@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Newsreader:opsz,wght@6..72,400;6..72,500;6..72,600&display=swap");:root{--paper:#fff;--surface:#fff;--surface-cool:#f6f7f9;--surface-sunk:#f1f3f6;--navy:#14161c;--navy-deep:#0c0e13;--ink:#101114;--ink-soft:#3a3d45;--muted:#6c7079;--muted-light:#9ca1aa;--on-navy:#f4f5f7;--on-navy-muted:#a4a9b4;--rule:#ebedf0;--rule-strong:#dcdfe4;--accent:#4f46e5;--accent-hover:#4338ca;--accent-soft:#eef0fe;--accent-line:#c7c9f7;--phrase:#f3f0ff;--phrase-secondary:#f8f7ff;--phrase-line:#cfc8f5;--grammar:#4f46e5;--grammar-soft:#f2f3fd;--correct:#2f6a4d;--correct-soft:#eef5f1;--correct-line:#a7c8b6;--wrong:#a1443c;--wrong-soft:#fbefed;--wrong-line:#d6a9a3;--warning:#9a6b16;--gold:#c08d2e;--focus:#4f46e5;--font-ui:"Inter",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--font-reading:"Newsreader",Georgia,"Times New Roman",serif;--measure:43rem;--measure-read:40rem;--measure-wide:76rem;--radius-sm:0.375rem;--radius-md:0.625rem;--radius-lg:1rem;--radius-xl:1.5rem;--space-1:0.25rem;--space-2:0.5rem;--space-3:1rem;--space-4:1.5rem;--space-5:2rem;--space-6:3rem;--space-7:5rem;--space-8:7.5rem;--shadow-sm:0 1px 2px rgba(16,17,20,.04);--shadow-md:0 4px 16px rgba(16,17,20,.07),0 1px 3px rgba(16,17,20,.04);--shadow-lg:0 16px 44px rgba(16,17,20,.13),0 2px 8px rgba(16,17,20,.05);--ease:cubic-bezier(0.22,0.61,0.36,1);--fast:140ms;--base:200ms;color-scheme:light}@media (prefers-reduced-motion:reduce){*,:after,:before{animation-duration:.01ms!important;transition-duration:.01ms!important}}*,:after,:before{box-sizing:border-box}html{color:var(--ink);font-family:var(--font-ui);font-size:16px;line-height:1.5;-webkit-text-size-adjust:100%;text-rendering:optimizeLegibility}body,html{background:var(--paper)}body{margin:0;min-width:320px;min-height:100vh;-webkit-font-smoothing:antialiased}button,input,select,textarea{font:inherit}.tok,a,button,label{-webkit-tap-highlight-color:transparent}button{color:inherit}a{color:var(--accent);text-underline-offset:.18em}a:hover{color:var(--accent-hover)}::selection{background:var(--accent-soft);color:var(--ink)}:focus-visible{outline:2px solid var(--focus);outline-offset:3px;border-radius:var(--radius-sm)}[lang=es]{font-family:var(--font-reading);font-feature-settings:"kern";font-kerning:normal}.site-header{z-index:60;background:hsla(0,0%,100%,.86);-webkit-backdrop-filter:saturate(180%) blur(12px);backdrop-filter:saturate(180%) blur(12px)}.site-header-inner{display:flex;align-items:center;margin-inline:auto;min-height:60px}.brand{font-family:var(--font-reading);font-size:1.22rem;font-weight:600;letter-spacing:-.02em;text-decoration:none}.brand:hover{color:var(--ink)}.nav-groups{display:flex;gap:.35rem}.nav-group{position:relative}.nav-top{display:inline-flex;align-items:center;min-height:44px;padding:0 .75rem;border-radius:var(--radius-sm);color:var(--ink-soft);font-size:.9rem;font-weight:500;text-decoration:none;transition:color var(--fast) var(--ease),background var(--fast) var(--ease)}.nav-top:hover{color:var(--ink);background:var(--surface-cool)}.nav-top.on{color:var(--accent)}.nav-menu{position:absolute;top:calc(100% - 2px);left:0;z-index:70;display:grid;grid-gap:.15rem;gap:.15rem;min-width:17rem;padding:.5rem;border:1px solid var(--rule);border-radius:var(--radius-md);background:var(--paper);box-shadow:var(--shadow-lg);opacity:0;transform:translateY(-4px);pointer-events:none;transition:opacity var(--fast) var(--ease),transform var(--fast) var(--ease)}.nav-menu.show{opacity:1;transform:none;pointer-events:auto}.nav-menu a{display:grid;grid-gap:.1rem;gap:.1rem;padding:.55rem .7rem;border-radius:var(--radius-sm);text-decoration:none}.nav-menu a:hover{background:var(--surface-cool)}.nav-menu-label{color:var(--ink);font-size:.88rem;font-weight:500}.nav-menu-hint{color:var(--muted);font-size:.78rem;line-height:1.4}.site-header-end{display:flex;align-items:center;gap:.4rem;margin-left:auto}.icon-link{display:inline-grid;place-items:center;width:36px;height:36px;border-radius:var(--radius-sm);color:var(--muted);transition:color var(--fast) var(--ease),background var(--fast) var(--ease)}.icon-link:hover{color:var(--ink);background:var(--surface-cool)}.icon-link.on{color:var(--accent)}.account-link{display:inline-flex;align-items:center;min-height:36px;padding:0 .85rem;border:1px solid var(--rule-strong);border-radius:999px;color:var(--ink-soft);font-size:.84rem;font-weight:500;text-decoration:none;transition:border-color var(--fast) var(--ease),color var(--fast) var(--ease)}.account-link:hover{border-color:var(--ink-soft);color:var(--ink)}.account-link.on{border-color:var(--accent);color:var(--accent)}.nav-toggle{display:none;width:40px;height:40px;padding:0;border:0;border-radius:var(--radius-sm);background:none;cursor:pointer}.nav-toggle span{display:block;width:18px;height:1.5px;margin:4px auto;background:var(--ink);border-radius:2px}@media (max-width:780px){.site-header-inner{gap:1rem}.nav-toggle{display:block}.nav-groups{position:absolute;top:100%;left:0;right:0;display:none;flex-direction:column;gap:0;padding:.5rem 1.25rem 1rem;border-bottom:1px solid var(--rule);background:var(--paper);box-shadow:var(--shadow-md)}.nav-groups.open{display:flex}.nav-top{min-height:48px;padding:0;font-size:1rem}.nav-menu{position:static;opacity:1;transform:none;pointer-events:auto;min-width:0;padding:0 0 .5rem .85rem;border:0;box-shadow:none}.account-link,.nav-menu-hint{display:none}}.wrap{width:min(calc(100% - 2rem),var(--measure));margin-inline:auto;padding-block:0 var(--space-7)}.back,.back-btn{display:inline-flex;align-items:center;gap:.4rem;min-height:44px;padding:0;border:0;background:none;color:var(--muted);cursor:pointer;font-size:.875rem;font-weight:600;text-decoration:none}.back-btn:before,.back:before{content:"←"}.back-btn:hover,.back:hover{color:var(--accent)}.hero{margin-inline:calc(50% - 50vw);margin-inline:calc(50% - 50dvw);padding:clamp(2.25rem,7vw,3.5rem) max(1rem,calc(50vw - var(--measure) / 2)) clamp(2rem,6vw,2.75rem);background:radial-gradient(120% 130% at 85% 0,#17364f 0,transparent 60%),var(--navy);color:var(--on-navy)}.hero h1{max-width:14ch;margin:0;font-family:var(--font-reading);font-size:clamp(2.3rem,9vw,3.6rem);font-weight:600;letter-spacing:-.03em;line-height:1.05}.hero h1 em{color:var(--gold);font-style:italic}.hero p{max-width:34rem;margin:1rem 0 0;color:var(--on-navy-muted);font-size:clamp(.95rem,3.4vw,1.05rem);line-height:1.6}.filters{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:1.75rem}.chip,.filters{align-items:center}.chip{display:inline-flex;justify-content:center;min-height:40px;padding:.45rem .95rem;border:1px solid hsla(0,0%,100%,.22);border-radius:999px;background:transparent;color:var(--on-navy-muted);cursor:pointer;font-size:.85rem;font-weight:600;line-height:1;transition:border-color .12s ease,background-color .12s ease,color .12s ease}.chip:hover{border-color:hsla(0,0%,100%,.5);color:var(--on-navy)}.chip.on{border-color:var(--accent);background:var(--accent);color:#fff}.filter-sep{width:1px;height:1.4rem;margin-inline:.2rem;background:hsla(0,0%,100%,.2)}.home-section{margin-top:var(--space-5)}.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:1rem;margin-bottom:.85rem}.section-head h2{margin:0;font-family:var(--font-reading);font-size:clamp(1.4rem,5vw,1.75rem);font-weight:600;letter-spacing:-.02em}.view-all{font-size:.85rem;font-weight:600;text-decoration:none}.view-all:after{content:" →"}.catalog{display:grid;grid-gap:.75rem;gap:.75rem}.catalog a{display:flex;gap:.9rem;align-items:center;padding:.75rem;border:1px solid var(--rule);border-radius:var(--radius-md);background:var(--surface);color:inherit;text-decoration:none;transition:border-color .12s ease,transform .12s ease}.catalog a:hover{border-color:var(--rule-strong);transform:translateY(-1px)}.catalog a:hover .catalog-title{color:var(--accent)}.thumb{flex:none;width:76px;height:62px;border-radius:var(--radius-sm);background:linear-gradient(140deg,#d8cdb8,#b9c7c2)}.t-family{background:linear-gradient(140deg,#e6c9a8,#cf9b6f)}.t-work{background:linear-gradient(140deg,#b9c3d2,#7f93ad)}.t-nature{background:linear-gradient(140deg,#b9cfae,#7fa383)}.t-food{background:linear-gradient(140deg,#e8bfa6,#cb8a63)}.t-school{background:linear-gradient(140deg,#cdc0dd,#9182ac)}.t-travel{background:linear-gradient(140deg,#a8cadd,#6f9cbb)}.catalog-body{display:grid;grid-gap:.3rem;gap:.3rem;min-width:0}.catalog-title{color:var(--ink);font-size:1rem;font-weight:650;letter-spacing:-.012em;line-height:1.3;transition:color .12s ease}.catalog .meta{display:flex;flex-wrap:wrap;gap:.3rem .5rem;font-size:.78rem}.catalog .meta>span+span:before{content:"· ";color:var(--muted-light)}.catalog .meta .level{color:var(--accent);font-weight:700;letter-spacing:.03em}.catalog .meta .level:before{content:none!important}.count{margin-top:var(--space-3);color:var(--muted-light);font-size:.78rem;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.empty{margin-block:var(--space-5);padding-block:var(--space-4);border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);color:var(--muted);text-align:center}.grammar-strip{display:flex;flex-wrap:wrap;gap:.5rem;margin:0;padding:0;list-style:none}.grammar-strip a{display:inline-flex;align-items:center;min-height:42px;padding:.45rem .9rem;border:1px solid var(--rule);border-radius:999px;background:var(--surface);color:var(--ink-soft);font-size:.85rem;font-weight:600;text-decoration:none}.grammar-strip a:hover{border-color:var(--grammar);color:var(--grammar)}.reading-head{padding:var(--space-4) 0 1.5rem}.reading-head h1{max-width:18ch;margin:.75rem 0 0;font-family:var(--font-reading);font-size:clamp(1.9rem,7.5vw,3rem);font-weight:600;letter-spacing:-.03em;line-height:1.08;text-wrap:balance}.reading-head .meta{display:flex;flex-wrap:wrap;gap:.3rem .55rem;margin:.85rem 0 0;color:var(--muted);font-size:.82rem}.reading{margin-top:clamp(1.5rem,5vw,2.5rem)}.reading p{margin:0 0 1.5em;color:var(--ink);font-family:var(--font-reading);font-size:clamp(1.22rem,4.6vw,1.42rem);line-height:1.75;hanging-punctuation:first last}.tok{position:relative;margin:0;padding:0;border:0;background:none;color:inherit;font:inherit;line-height:inherit;letter-spacing:inherit;text-align:inherit;border-radius:.15em;touch-action:manipulation;transition:color .1s ease,background-color .1s ease}.plain,.tok{cursor:pointer}.has-entry{box-shadow:inset 0 -1px 0 0 var(--phrase-line);transition:box-shadow var(--fast) var(--ease),background-color var(--fast) var(--ease),color var(--fast) var(--ease)}.in-phrase{background:var(--phrase);box-decoration-break:clone;-webkit-box-decoration-break:clone}.phrase-start{padding-left:.12em;border-radius:.25em 0 0 .25em}.phrase-end{padding-right:.12em;border-radius:0 .25em .25em 0}.phrase-start.phrase-end{border-radius:.25em}.in-phrase.secondary{background:var(--phrase-secondary)}.has-grammar{-webkit-text-decoration-line:underline;text-decoration-line:underline;-webkit-text-decoration-color:var(--grammar);text-decoration-color:var(--grammar);text-decoration-thickness:.1em;text-underline-offset:.17em}.tok.seen{color:var(--muted)}.tok.seen.has-entry{box-shadow:inset 0 -1px 0 0 var(--rule-strong)}.tok.hovered{color:var(--accent);box-shadow:inset 0 -1.5px 0 0 var(--accent)}.tok.is-saved{box-shadow:inset 0 -2px 0 0 var(--accent-line)}.tok.active{background-color:var(--accent-soft);color:var(--accent-hover);box-shadow:inset 0 -1.5px 0 0 var(--accent)}.tok:focus-visible{outline:2px solid var(--focus);outline-offset:3px}.hover-hint{position:absolute;z-index:15;transform:translateY(-100%);max-width:90vw;padding:.3rem .55rem;border-radius:var(--radius-sm);background:var(--navy);color:var(--on-navy);font-family:var(--font-ui);font-size:.78rem;line-height:1.3;white-space:nowrap;overflow:hidden;pointer-events:none;text-overflow:ellipsis}.finish{display:flex;flex-wrap:wrap;gap:1rem;align-items:center;justify-content:space-between;margin-top:var(--space-5);padding-top:var(--space-4);border-top:1px solid var(--rule)}.lookup-count{margin:0;color:var(--muted);font-size:.82rem;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.btn{min-height:48px;padding:.75rem 1.35rem;border:1px solid var(--rule-strong);border-radius:var(--radius-md);background:var(--surface);color:var(--ink);font-weight:650;line-height:1;transition:background-color .12s ease,border-color .12s ease,color .12s ease}.btn:hover{border-color:var(--ink-soft)}.btn:disabled{opacity:.5;cursor:default}.btn.primary{border-color:var(--accent)}.btn.primary:hover{border-color:var(--accent-hover)}.btn.wide{width:100%;margin-top:1.5rem}.card{background:var(--surface);color:var(--ink);font-family:var(--font-ui)}.popover{position:absolute;z-index:60;width:min(22.5rem,calc(100vw - 2rem));padding:1.35rem 1.4rem 1.4rem;border:1px solid var(--rule);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);animation:card-in .18s var(--ease)}@keyframes card-in{0%{opacity:0;transform:translateY(-6px) scale(.985)}to{opacity:1;transform:none}}.sheet{position:fixed;z-index:100;right:0;bottom:0;left:0;max-height:min(78vh,42rem);overflow-y:auto;padding:1.25rem 1.25rem calc(1.25rem + env(safe-area-inset-bottom));border-top:1px solid var(--rule);border-radius:var(--radius-xl) var(--radius-xl) 0 0;box-shadow:var(--shadow-lg);animation:rise .22s var(--ease)}.sheet:before{margin:-.35rem auto 1rem}@keyframes rise{0%{transform:translateY(100%)}to{transform:none}}.card-word{margin:0;font-family:var(--font-reading);font-size:1.55rem;font-weight:600;letter-spacing:-.02em;line-height:1.15}.card-meta{margin:.3rem 0 0;color:var(--muted);font-size:.76rem;font-weight:600;letter-spacing:.03em}.card-gloss{margin:.6rem 0 0;font-size:1.02rem;font-weight:500;line-height:1.45}.card-gloss.muted{color:var(--muted);font-weight:500}.card-base{margin:.4rem 0 0;color:var(--muted);font-size:.82rem}.card-base strong{color:var(--ink)}.card-note{margin:.8rem 0 0;color:var(--muted);font-size:.82rem;line-height:1.55}.card-here{margin:1.05rem 0 0;padding-top:.95rem;border-top:1px solid var(--rule);color:var(--ink-soft);font-size:.89rem;line-height:1.62}.card-here-label{display:block;margin-bottom:.4rem;color:var(--accent);font-size:.66rem;font-weight:600;letter-spacing:.11em;text-transform:uppercase}.card-region{display:inline-flex;align-items:center;gap:.35rem;margin-top:.85rem;padding:.2rem .55rem;border:1px solid var(--rule);border-radius:999px;color:var(--muted);font-size:.72rem;font-weight:500}.card-example{margin:.9rem 0 0;padding-left:.85rem;border-left:2px solid var(--phrase);font-family:var(--font-reading);font-size:1.02rem;line-height:1.5}.card-example-en{display:block;margin-top:.2rem;color:var(--muted);font-family:var(--font-ui);font-size:.8rem}.card-grammar{margin-top:1rem;padding-top:.9rem;border-top:1px solid var(--rule)}.card-grammar h4{margin:0;color:var(--grammar);font-size:.76rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase}.card-grammar p{margin:.35rem 0 0;color:var(--ink-soft);font-size:.84rem;line-height:1.55}.card-grammar a{display:inline-flex;align-items:center;min-height:40px;color:var(--grammar);font-size:.82rem;font-weight:650}.card-actions{display:flex;gap:.6rem;margin-top:1.1rem}.card-actions .btn{flex:1 1;min-height:44px;padding:.6rem 1rem}.card-actions .btn:first-child{border-color:var(--accent);background:var(--accent);color:#fff}.card-actions .btn:first-child:hover{background:var(--accent-hover)}.practice,.quiz{padding-top:var(--space-4)}.quiz-top{display:flex;align-items:center;justify-content:space-between;gap:1rem}.progress-count{color:var(--muted);font-size:.85rem;font-weight:600;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.progress{height:3px;margin:.5rem 0 var(--space-5);border-radius:999px;background:var(--rule);overflow:hidden}.progress>span{display:block;height:100%;background:var(--accent);transition:width .2s ease}.drills>h2,.practice>h2,.quiz>h2,.results h2{margin:0 0 1rem;font-family:var(--font-reading);font-size:clamp(1.5rem,5.5vw,2rem);font-weight:600;letter-spacing:-.025em;line-height:1.15}.quiz-prompt{margin:0 0 1.5rem;font-family:var(--font-reading);font-size:clamp(1.25rem,5vw,1.6rem);line-height:1.4}.answers{display:flex;flex-wrap:wrap;gap:.6rem}.answers>*{flex:1 1 14rem}.answer{display:flex;gap:.85rem;align-items:center;width:100%;min-height:52px;padding:.8rem 1rem;border:1px solid var(--rule);border-radius:var(--radius-md);background:var(--surface);cursor:pointer;text-align:left;line-height:1.4;transition:border-color .12s ease,background-color .12s ease}.answer:hover:not(:disabled){border-color:var(--rule-strong)}.answer:disabled{cursor:default}.answer-letter{display:grid;place-items:center;flex:none;width:28px;height:28px;border:1px solid var(--rule-strong);border-radius:999px;color:var(--muted);font-size:.78rem;font-weight:700}.answer-text{flex:1 1}.answer-mark{flex:none;color:var(--correct);font-weight:700}.answer.chosen{border-color:var(--accent)}.answer.right{border-color:var(--correct-line);background:var(--correct-soft)}.answer.right .answer-letter{border-color:var(--correct-line);background:var(--correct);color:#fff}.answer.wrong{border-color:var(--wrong-line);background:var(--wrong-soft)}.answer.wrong .answer-letter{border-color:var(--wrong-line);background:var(--wrong);color:#fff}.why{margin-top:1.25rem;padding:.9rem 1rem;border:1px solid var(--rule);border-radius:var(--radius-md);background:var(--surface-cool)}.why h3{margin:0 0 .3rem;color:var(--ink);font-size:.85rem;font-weight:700}.why h3:before{content:"💡 "}.why p{margin:0;color:var(--ink-soft);font-size:.9rem;line-height:1.6}.results{padding-top:var(--space-4)}.results-panel{padding:clamp(1.5rem,6vw,2.25rem);border-radius:var(--radius-lg);background:radial-gradient(110% 130% at 80% 0,#17364f 0,transparent 62%),var(--navy);color:var(--on-navy)}.results-panel h2{margin:.3rem 0 0;color:var(--on-navy)}.eyebrow{margin:0;font-weight:700;letter-spacing:.09em}.eyebrow,.results-lead{color:var(--on-navy-muted)}.results-lead{margin:.6rem 0 0;font-size:.95rem;line-height:1.6}.stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:1rem .5rem;gap:1rem .5rem;margin:1.75rem 0 0;padding-top:1.5rem;border-top:1px solid hsla(0,0%,100%,.15)}.stats>div{min-width:0;text-align:center}.stats dd,.stats dt{margin:0}.stats dd{color:var(--on-navy);font-size:clamp(1.5rem,6.5vw,2rem);font-weight:700;letter-spacing:-.03em;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.stats dt{margin-top:.2rem;color:var(--on-navy-muted);font-size:.75rem;font-weight:600}.stats>div{display:flex;flex-direction:column-reverse}.results-note-box{margin-top:1.5rem;padding:.9rem 1rem;border-radius:var(--radius-md);background:hsla(0,0%,100%,.07)}.results-note-box p{margin:0;color:var(--on-navy);font-size:.88rem;line-height:1.55}.wrap-actions{display:flex;flex-direction:column;gap:.65rem;margin-top:1.25rem}.wrap-actions .btn{flex:1 1}.results-note{margin-top:1.25rem;color:var(--muted);line-height:1.6}.results-note.small{font-size:.82rem}.practice{text-align:center}.practice .progress,.practice .quiz-top{text-align:left}.practice-prompt{margin:var(--space-4) 0 0;color:var(--muted);font-size:.85rem;font-weight:600}.practice-word{margin:1.5rem auto 2rem;font-family:var(--font-reading);font-size:clamp(2.4rem,12vw,4rem);font-weight:500;letter-spacing:-.035em;line-height:1.05;text-wrap:balance}.practice-word.en{font-family:var(--font-ui);font-size:clamp(1.6rem,8vw,2.4rem);font-weight:600}.practice-options{display:flex;flex-wrap:wrap;gap:.65rem}.practice-options>*{flex:1 1 12rem}.opt-btn{display:flex;gap:.5rem;align-items:center;justify-content:center;width:100%;min-height:56px;padding:.8rem 1rem;border:1px solid var(--rule);border-radius:var(--radius-md);background:var(--surface);color:var(--ink);cursor:pointer;font-weight:600;line-height:1.4;transition:border-color .12s ease,background-color .12s ease}.opt-btn:hover:not(:disabled){border-color:var(--rule-strong)}.opt-btn:disabled{cursor:default}.opt-btn.right{border-color:var(--correct-line);background:var(--correct-soft);color:#24583f}.opt-btn.wrong{border-color:var(--wrong-line);background:var(--wrong-soft);color:#7d342f}.opt-btn.small{min-height:44px;width:auto;min-width:6rem;font-size:.9rem}.grammar-group{margin-top:var(--space-5)}.grammar-group>h2{margin:0 0 .6rem;color:var(--muted);font-size:.72rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase}.grammar-group .catalog a{align-items:flex-start}.grammar-group .catalog h3{margin:0;font-family:var(--font-reading);font-size:1.15rem;font-weight:600;letter-spacing:-.015em}.grammar-group .catalog p{margin:.3rem 0 0;color:var(--muted);font-size:.88rem;line-height:1.55}.grammar-group .catalog .meta{display:inline-block;margin-bottom:.35rem;color:var(--grammar);font-size:.72rem;font-weight:700;letter-spacing:.05em}.lesson-hero{margin-inline:calc(50% - 50vw);margin-inline:calc(50% - 50dvw);margin-bottom:var(--space-5);padding:clamp(1.75rem,6vw,2.75rem) max(1rem,calc(50vw - var(--measure) / 2));background:radial-gradient(120% 130% at 85% 0,#17364f 0,transparent 60%),var(--navy);color:var(--on-navy)}.grammar-tag{margin:0;color:var(--accent);font-size:.72rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase}.lesson-hero h1{max-width:16ch;margin:.5rem 0 0;font-family:var(--font-reading);font-size:clamp(2rem,8vw,3.1rem);font-weight:600;letter-spacing:-.03em;line-height:1.05}.grammar-lead{max-width:38rem;margin:.9rem 0 0;color:var(--on-navy-muted);font-size:1rem;line-height:1.65}.duo{display:grid;grid-gap:.85rem;gap:.85rem;margin-bottom:var(--space-5)}.duo-card{padding:1.1rem 1.25rem;border:1px solid var(--rule);border-radius:var(--radius-md)}.duo-card.left{border-color:var(--correct-line);background:var(--correct-soft)}.duo-card.right{border-color:#e3bda6;background:var(--accent-soft)}.duo-card h2{margin:0 0 .75rem;font-family:var(--font-reading);font-size:1.2rem;font-weight:600}.duo-card.left h2{color:#23543d}.duo-card.right h2{color:var(--accent-hover)}.duo-card ul{margin:0;padding:0;list-style:none;display:grid;grid-gap:.55rem;gap:.55rem}.duo-card li{position:relative;padding-left:1.5rem;font-size:.9rem;line-height:1.5}.duo-card li:before{position:absolute;left:0;content:"✓";font-weight:700}.duo-card.left li:before{color:var(--correct)}.duo-card.right li:before{color:var(--accent)}.grammar-section{margin-top:var(--space-5);padding-top:var(--space-4);border-top:1px solid var(--rule)}.grammar-section>h2{margin:0 0 .9rem;font-family:var(--font-reading);font-size:clamp(1.4rem,5.5vw,1.85rem);font-weight:600;letter-spacing:-.025em}.grammar-section>p{margin:.75rem 0;color:var(--ink-soft);line-height:1.7}.tick-list{margin:1.1rem 0;padding:0;list-style:none}.tick-list li{position:relative;margin:.65rem 0;padding-left:1.5rem;color:var(--ink-soft);line-height:1.6}.tick-list li:before{position:absolute;left:0;color:var(--correct);content:"✓";font-weight:700}.examples{margin:1.25rem 0;padding:0;list-style:none}.examples li{display:grid;grid-gap:.15rem;gap:.15rem;padding:.65rem 0 .65rem .9rem;border-left:2px solid var(--phrase)}.examples [lang=es]{color:var(--ink);font-size:1.05rem;line-height:1.45}.examples .en{color:var(--muted);font-family:var(--font-ui);font-size:.85rem}.examples .en em{font-style:italic;opacity:.8}.table-wrap{width:100%;margin:1.25rem 0;overflow-x:auto;border:1px solid var(--rule);border-radius:var(--radius-md);background:var(--surface);-webkit-overflow-scrolling:touch}.table-wrap table{width:100%;min-width:24rem;border-collapse:collapse;font-size:.9rem}.table-wrap td,.table-wrap th{padding:.7rem .85rem;border-bottom:1px solid var(--rule);text-align:left;vertical-align:top}.table-wrap th{background:var(--surface-cool);color:var(--ink);font-size:.72rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase}.table-wrap td{color:var(--ink-soft)}.table-wrap tr:last-child td{border-bottom:0}.contrast{border:1px solid var(--rule);border-radius:var(--radius-md);overflow:hidden}.contrast-head{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:1px;gap:1px;background:var(--rule)}.contrast-head span{padding:.6rem .9rem;background:var(--surface-cool);color:var(--ink);font-size:.75rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase}.contrast-row{padding:.9rem;border-top:1px solid var(--rule)}.contrast-case{margin:0 0 .6rem;color:var(--muted);font-size:.76rem;font-weight:650}.contrast-pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:.75rem;gap:.75rem}.contrast-pair>div{display:grid;grid-gap:.2rem;gap:.2rem;min-width:0}.contrast-pair [lang=es]{font-size:.98rem;line-height:1.45}.contrast-pair .en{color:var(--muted);font-size:.8rem;line-height:1.4}.mistake{margin:1.25rem 0;padding-left:1rem;border-left:3px solid var(--wrong)}.mistake p{margin:0;font-size:1rem;line-height:1.5}.mistake .wrong{color:var(--wrong);text-decoration:line-through;text-decoration-thickness:1.5px}.mistake .right{margin-top:.35rem;color:var(--correct);font-weight:650}.mistake .why{margin-top:.5rem;color:var(--muted);font-family:var(--font-ui);font-size:.85rem;line-height:1.6}.grammar-watch{margin:1.5rem 0;padding:1rem 1.15rem;border:1px solid #e0cda0;border-radius:var(--radius-md);background:#fbf3e3;color:#5a4820}.grammar-watch h2{margin:0 0 .35rem;font-size:.74rem;font-weight:700;letter-spacing:.07em;text-transform:uppercase}.grammar-watch p{margin:0;font-size:.9rem;line-height:1.6}.drills{margin-top:var(--space-5);padding:1.25rem;border:1px solid var(--rule);border-radius:var(--radius-md);background:var(--surface-cool)}.drill{padding:1.1rem 0;border-bottom:1px solid var(--rule)}.drill:first-of-type{padding-top:0}.drill:last-of-type{padding-bottom:0;border-bottom:0}.drill-prompt{margin:0 0 .75rem;font-size:1.05rem;font-weight:600;line-height:1.5}.drill-options{display:flex;flex-wrap:wrap;gap:.5rem}.drill-why{margin:.75rem 0 0;padding-left:.8rem;border-left:2px solid var(--grammar);color:var(--muted);font-size:.85rem;line-height:1.6}.drill-score{margin-top:1.1rem;color:var(--grammar);font-size:1.1rem;font-weight:700;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.grammar-readings{margin-top:var(--space-5);padding-top:var(--space-4);border-top:1px solid var(--rule)}.grammar-readings>h2{margin:0 0 .75rem;font-family:var(--font-reading);font-size:1.35rem;font-weight:600}.grammar-readings a{display:block;padding:.85rem 0;border-top:1px solid var(--rule);color:var(--ink);text-decoration:none}.grammar-readings a:last-child{border-bottom:1px solid var(--rule)}.grammar-readings a:hover strong{color:var(--accent)}.grammar-readings strong{display:block;font-size:1rem;font-weight:650}.grammar-readings .meta{display:block;margin-top:.2rem;color:var(--muted);font-size:.8rem}.grammar-related{margin-top:var(--space-5)}.grammar-related>h2{margin:0 0 .6rem;color:var(--muted);font-size:.72rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase}.grammar-related ul{display:flex;flex-wrap:wrap;gap:.5rem;margin:0;padding:0;list-style:none}.grammar-related a{display:inline-flex;align-items:center;min-height:42px;padding:.45rem .9rem;border:1px solid var(--rule);border-radius:999px;background:var(--surface);color:var(--ink-soft);font-size:.85rem;font-weight:600;text-decoration:none}.grammar-related a:hover{border-color:var(--grammar);color:var(--grammar)}@media (min-width:38rem){.site-header-inner,.wrap{width:min(calc(100% - 3rem),var(--measure))}.duo{grid-template-columns:repeat(2,minmax(0,1fr))}.stats{grid-template-columns:repeat(4,minmax(0,1fr))}.wrap-actions{flex-direction:row}.thumb{width:96px;height:72px}.btn.wide{width:auto;min-width:16rem}}@media (prefers-reduced-motion:reduce){*,:after,:before{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}}.masthead{padding:var(--space-5) 0 var(--space-4)}.masthead h1{margin:.5rem 0 0;font-family:var(--font-reading);font-size:clamp(2rem,8vw,2.9rem);font-weight:600;letter-spacing:-.03em;line-height:1.05}.masthead p{max-width:34rem;margin:.85rem 0 0;color:var(--muted);line-height:1.6}.grammar-page,.series{padding-top:var(--space-4)}.series{margin-top:var(--space-5);border-top:1px solid var(--rule)}.series>h2{margin:0 0 .6rem;color:var(--muted);font-size:.72rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase}.series ol{margin:0 0 1.25rem;padding:0;list-style:none}.series li{border-top:1px solid var(--rule)}.series li:last-of-type{border-bottom:1px solid var(--rule)}.series a,.series span{display:flex;gap:.75rem;align-items:center;min-height:52px;padding:.7rem 0;color:var(--ink);font-size:.95rem;font-weight:600;text-decoration:none}.series em{display:grid;place-items:center;flex:none;width:26px;height:26px;border:1px solid var(--rule-strong);border-radius:999px;color:var(--muted);font-size:.75rem;font-style:normal;font-weight:700}.series li.on span{color:var(--accent)}.series li.on em{border-color:var(--accent);background:var(--accent);color:#fff}.series a:hover{color:var(--accent)}.focus-link{display:inline-flex;flex-direction:column;gap:.1rem;margin-top:1rem;padding:.6rem .9rem;border:1px solid var(--grammar);border-radius:var(--radius-md);background:var(--grammar-soft);color:var(--grammar);text-decoration:none}.focus-link span{font-size:.7rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;opacity:.8}.focus-link strong{font-size:.95rem;font-weight:650}.focus-link:hover{background:#dee7f2;color:var(--grammar)}.badge{display:inline-block;margin-left:.5rem;padding:.15rem .45rem;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-size:.65rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;vertical-align:middle}.collections{display:grid;grid-gap:.65rem;gap:.65rem}.collections a{display:grid;grid-gap:.2rem;gap:.2rem;padding:1rem 1.15rem;border:1px solid var(--rule);border-radius:var(--radius-md);background:radial-gradient(120% 160% at 90% 0,rgba(23,54,79,.06) 0,transparent 60%),var(--surface);color:inherit;text-decoration:none;transition:border-color .12s ease,transform .12s ease}.collections a:hover{border-color:var(--navy);transform:translateY(-1px)}.collection-tag{color:var(--accent);font-size:.7rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.collections strong{font-family:var(--font-reading);font-size:1.2rem;font-weight:600;letter-spacing:-.015em}.collection-count{color:var(--muted);font-size:.8rem}@media (min-width:38rem){.collections{grid-template-columns:repeat(3,minmax(0,1fr))}}.practises{margin-top:1.25rem;padding:1rem 1.15rem;border:1px solid var(--rule);border-radius:var(--radius-md);background:var(--surface)}.practises>h2{margin:0 0 .7rem;color:var(--muted);font-size:.72rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase}.practises ul{display:grid;grid-gap:.35rem;gap:.35rem;margin:0;padding:0;list-style:none}.practises a{display:flex;flex-wrap:wrap;gap:.3rem .6rem;align-items:baseline;min-height:40px;padding:.35rem 0;color:var(--ink);text-decoration:none}.practises strong{font-size:.98rem;font-weight:650}.practises .level,.practises a:hover strong{color:var(--grammar)}.practises .level{padding:.1rem .4rem;border-radius:999px;background:var(--grammar-soft);font-size:.68rem;font-weight:700;letter-spacing:.04em}.practises .hits{color:var(--muted);font-size:.8rem}.practises li.main strong{color:var(--accent)}.practises li.main .level{background:var(--accent-soft);color:var(--accent)}img.thumb{flex:none;width:76px;height:62px;border-radius:var(--radius-sm)}.hero-image,img.thumb{object-fit:cover;background:var(--surface-cool)}.hero-image{display:block;width:100%;height:auto;margin-top:var(--space-4);border-radius:var(--radius-md);aspect-ratio:4/3}.hero-image+.reading-head{padding-top:1.25rem}@media (min-width:38rem){img.thumb{width:96px;height:72px}.hero-image{aspect-ratio:16/9}}.phrase-group{margin-top:var(--space-5)}.phrase-group>h2{margin:0 0 .75rem;color:var(--muted);font-size:.72rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase}.phrase-group ul{margin:0;padding:0;list-style:none;display:grid;grid-gap:.6rem;gap:.6rem}.phrase-group li{padding:.9rem 1.05rem;border:1px solid var(--rule);border-radius:var(--radius-md);background:var(--surface)}.phrase-es{display:flex;flex-wrap:wrap;gap:.5rem;align-items:baseline;margin:0;font-family:var(--font-reading);font-size:1.2rem;font-weight:500;line-height:1.35}.phrase-en{margin:.2rem 0 0;color:var(--ink-soft);font-size:.92rem}.phrase-note{margin:.55rem 0 0;padding-left:.75rem;border-left:2px solid var(--phrase);color:var(--muted);font-size:.86rem;line-height:1.55}.register{padding:.12rem .45rem;border-radius:999px;background:var(--surface-cool);color:var(--muted);font-family:var(--font-ui);font-size:.65rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase}.phrase-es .register{white-space:nowrap}.phrase-links{display:flex;flex-wrap:wrap;gap:.4rem .9rem;margin:.6rem 0 0}.phrase-links a{display:inline-flex;align-items:center;min-height:36px;color:var(--grammar);font-size:.82rem;font-weight:600;text-decoration:none}.phrase-links a:hover{text-decoration:underline}.register.local{background:var(--accent-soft);color:var(--accent)}.variants{display:flex;flex-wrap:wrap;gap:.35rem .5rem;margin:.65rem 0 0}.variants>div{display:flex;gap:.35rem;align-items:baseline;padding:.25rem .55rem;border:1px solid var(--rule);border-radius:999px;background:var(--paper)}.variants dt{margin:0;color:var(--muted);font-size:.68rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase}.variants dd{margin:0;font-family:var(--font-reading);font-size:.92rem}.chapters{margin-top:var(--space-4)}.chapter-tag{color:var(--accent);font-size:.7rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.chapters ol{display:flex;flex-wrap:wrap;gap:.4rem;margin:.5rem 0 0;padding:0;list-style:none;counter-reset:ch}.chapters li{counter-increment:ch}.chapters a,.chapters li>span{display:inline-flex;align-items:center;gap:.35rem;min-height:36px;padding:.35rem .75rem;border:1px solid var(--rule);border-radius:999px;color:var(--muted);font-size:.8rem;font-weight:600;text-decoration:none}.chapters a:before,.chapters li>span:before{content:counter(ch);opacity:.6}.chapters a:hover{border-color:var(--accent);color:var(--accent)}.chapters li.on>span{border-color:var(--accent);background:var(--accent);color:#fff}.next-chapter{display:grid;grid-gap:.15rem;gap:.15rem;margin-top:1.25rem;padding:1rem 1.15rem;border:1px solid var(--rule);border-radius:var(--radius-md);background:var(--surface);text-decoration:none;color:inherit}.next-chapter span{color:var(--accent);font-size:.7rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.next-chapter strong{font-family:var(--font-reading);font-size:1.15rem;font-weight:600}.next-chapter:hover{border-color:var(--accent)}.practice-sentence{margin:1.5rem auto .75rem;max-width:32rem;font-family:var(--font-reading);font-size:clamp(1.3rem,5.5vw,1.7rem);line-height:1.6;text-wrap:balance}.practice-hint{margin:0 0 1.75rem;color:var(--muted);font-size:.9rem}.account{margin-top:var(--space-4)}.notice{padding:1.25rem 1.35rem;border:1px solid var(--rule);border-radius:var(--radius-md);background:var(--surface)}.notice h2{margin:0 0 .5rem;font-family:var(--font-reading);font-size:1.25rem;font-weight:600}.notice p{margin:0 0 1rem;color:var(--ink-soft);line-height:1.65}.notice .btn{display:inline-flex}.signin{display:grid;grid-gap:.6rem;gap:.6rem}.signin input{min-height:48px;padding:.7rem .9rem;border:1px solid var(--rule-strong);border-radius:var(--radius-md);background:var(--paper);color:var(--ink)}.signin input:focus-visible{outline:3px solid var(--focus);outline-offset:2px}.account-link{margin-left:auto}.vocab-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));margin:var(--space-4) 0 0;padding:1rem 0;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);text-align:center}.vocab-stats div{display:flex;flex-direction:column}.vocab-stats dd{margin:0;font-size:clamp(1.4rem,6vw,1.9rem);font-weight:700;letter-spacing:-.03em;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.vocab-stats dt{margin-top:.15rem;color:var(--muted);font-size:.72rem;font-weight:600}.vocab-list{display:grid;grid-gap:.6rem;gap:.6rem;margin:var(--space-4) 0 0;padding:0;list-style:none}.vocab-list li{padding:.9rem 1.05rem;border:1px solid var(--rule);border-radius:var(--radius-md);background:var(--surface)}.vocab-form{display:flex;flex-wrap:wrap;gap:.5rem;align-items:baseline;margin:0;font-family:var(--font-reading);font-size:1.2rem;font-weight:500}.vocab-gloss{margin:.15rem 0 0;color:var(--ink-soft);font-size:.92rem}.vocab-meta{display:flex;flex-wrap:wrap;gap:.3rem .85rem;margin:.45rem 0 0;color:var(--muted);font-size:.8rem}.vocab-meta a{color:var(--grammar);font-weight:600;text-decoration:none}.vocab-status{padding:.12rem .45rem;border-radius:999px;background:var(--surface-cool);color:var(--muted);font-family:var(--font-ui);font-size:.65rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase}.vocab-status.s-learning{background:var(--accent-soft);color:var(--accent)}.vocab-status.s-familiar{background:var(--grammar-soft);color:var(--grammar)}.vocab-status.s-mastered{background:var(--correct-soft);color:var(--correct)}.sync-note{margin-top:var(--space-5)}.vocab-form span[aria-label]{color:var(--accent);font-size:.9rem}.site-footer{margin-top:var(--space-7)}.site-footer-inner{width:min(calc(100% - 2rem),var(--measure));margin-inline:auto;padding:var(--space-5) 0 var(--space-6)}.footer-brand{margin:0 0 .75rem;font-family:var(--font-reading);font-size:1.05rem;font-weight:600}.site-footer nav{display:flex;flex-wrap:wrap;gap:.5rem 1.25rem}.site-footer nav a{display:inline-flex;align-items:center;min-height:40px;color:var(--muted);font-size:.875rem;font-weight:600;text-decoration:none}.site-footer nav a:hover{color:var(--accent)}.footer-note{margin:.75rem 0 0;color:var(--muted-light);font-size:.8rem}.prose{max-width:36rem}.prose h2{margin:var(--space-5) 0 .6rem;font-family:var(--font-reading);font-size:1.3rem;font-weight:600;letter-spacing:-.02em}.prose p{line-height:1.75}.prose p,.prose ul{margin:0 0 1rem;color:var(--ink-soft)}.prose ul{padding-left:1.1rem;line-height:1.8}.prose em{font-style:italic}.prose .card-actions{display:flex;gap:.6rem}.exercise{margin-top:var(--space-5)}.exercise-instructions{margin:0 0 var(--space-4);padding:.85rem 1rem;border-left:3px solid var(--accent);background:var(--surface);color:var(--ink-soft);font-size:.92rem;line-height:1.6}.exercise-items{margin:0;padding:0;list-style:none;counter-reset:q}.exercise-items>li{counter-increment:q;padding:1rem 0 1rem 2.25rem;border-bottom:1px solid var(--rule);position:relative}.exercise-items>li:before{content:counter(q);position:absolute;left:0;top:1.05rem;display:grid;place-items:center;width:24px;height:24px;border:1px solid var(--rule-strong);border-radius:999px;color:var(--muted);font-family:var(--font-ui);font-size:.72rem;font-weight:700}.exercise-items>li.v-right:before{border-color:var(--correct-line);background:var(--correct);color:#fff}.exercise-items>li.v-empty:before,.exercise-items>li.v-wrong:before{border-color:var(--wrong-line);background:var(--wrong);color:#fff}.exercise-items>li.v-accent:before{border-color:#d8b46a;background:var(--warning);color:#fff}.exercise-line{margin:0;font-family:var(--font-reading);font-size:1.12rem;white-space:pre-wrap}.exercise-line .cue{margin:0 .35rem;color:var(--muted);font-family:var(--font-ui);font-size:.8rem;font-style:italic;white-space:normal}.exercise-line .grow-field{min-width:7rem;padding:.1rem .35rem;margin:0 .15rem;border:0;border-bottom:1.5px solid var(--rule-strong);border-radius:0;background:transparent;color:var(--accent);font-family:var(--font-reading);font-size:1.05rem;text-align:center}.exercise-line .grow-field.joined{min-width:4.5rem;margin:0;padding:.1rem .2rem}.exercise-line .grow-field:focus{outline:none;border-bottom-color:var(--accent)}.exercise-line .grow-field:focus-visible{outline:2px solid var(--focus);outline-offset:4px}.exercise-line .grow-field:disabled{color:var(--ink);opacity:1}.v-empty .exercise-line .grow-field,.v-wrong .exercise-line input{color:var(--wrong);border-bottom-color:var(--wrong-line)}.exercise-feedback{margin:.5rem 0 0;color:var(--muted);font-size:.86rem;line-height:1.55}.exercise-feedback strong{color:var(--correct);font-family:var(--font-reading);font-size:1rem}.exercise-actions{display:flex;flex-wrap:wrap;gap:1rem;align-items:center;margin-top:var(--space-4)}.exercise-score{margin:0;font-size:1.5rem;font-weight:700;letter-spacing:-.03em;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}@media print{.back,.exercise-actions,.site-footer,.site-header{display:none}.exercise-line .grow-field{border-bottom:1px solid #999;min-width:10rem}}.reading-lead{max-width:34rem;margin:.85rem 0 0;color:var(--ink-soft);font-size:1.02rem;line-height:1.6}.results .practises{margin-top:var(--space-4)}.results .practises a{flex-wrap:nowrap}.skeleton{display:grid;grid-gap:.65rem;gap:.65rem}.skeleton .bar{height:.85rem;border-radius:4px;background:linear-gradient(90deg,var(--surface-cool) 0,#eceae3 50%,var(--surface-cool) 100%);background-size:200% 100%;animation:shimmer 1.4s ease-in-out infinite}.skeleton .w-90{width:90%}.skeleton .w-60{width:60%}.skeleton .w-40{width:40%}@keyframes shimmer{to{background-position:-200% 0}}@media (prefers-reduced-motion:reduce){.skeleton .bar{animation:none}}.wide{width:min(calc(100% - 2.5rem),var(--measure-wide));margin-inline:auto}.landing-hero{padding:clamp(3.5rem,9vw,var(--space-8)) 0 clamp(2.5rem,6vw,var(--space-7))}.landing-hero h1{max-width:15ch;margin:0;font-family:var(--font-reading);font-size:clamp(2.5rem,6.2vw,4rem);font-weight:500;letter-spacing:-.028em;line-height:1.05;text-wrap:balance}.landing-hero p.lead{max-width:38rem;margin:1.35rem 0 0;color:var(--ink-soft);font-size:clamp(1.05rem,2.4vw,1.2rem);line-height:1.65}.hero-actions{display:flex;flex-wrap:wrap;gap:1.25rem;align-items:center;margin-top:2rem}.text-link{display:inline-flex;align-items:center;gap:.3rem;min-height:44px;color:var(--ink-soft);font-size:.95rem;font-weight:600;text-decoration:none}.text-link:after{content:"→";transition:transform .18s ease-out}.text-link:hover{color:var(--accent)}.text-link:hover:after{transform:translateX(3px)}.hero-meta{display:flex;flex-wrap:wrap;gap:.4rem 1.5rem;margin:2.25rem 0 0;color:var(--muted);font-size:.85rem}.hero-meta span{display:inline-flex;align-items:center;gap:.45rem}.hero-meta span:before{content:"";width:4px;height:4px;border-radius:999px;background:var(--accent)}.band{padding:clamp(3rem,8vw,var(--space-8)) 0;border-bottom:1px solid var(--rule)}.band:last-of-type{border-bottom:0}.band-head{max-width:34rem;margin-bottom:var(--space-5)}.band-head h2{margin:0;font-family:var(--font-reading);font-size:clamp(1.75rem,4vw,2.15rem);font-weight:500;letter-spacing:-.022em;line-height:1.15}.band-head p{margin:.75rem 0 0;color:var(--muted);font-size:1.02rem;line-height:1.65}.band-foot{margin-top:var(--space-5)}.demo{display:grid;grid-gap:var(--space-5);gap:var(--space-5);align-items:start}.demo-paper{padding:clamp(1.5rem,4vw,2.5rem);border:1px solid var(--rule);border-radius:var(--radius-lg);background:var(--surface)}.demo-paper p{margin:0 0 1.1rem;font-family:var(--font-reading);font-size:clamp(1.25rem,3vw,1.5rem);line-height:1.8}.demo-paper p:last-of-type{margin-bottom:0}.demo-hint{margin-top:1.5rem!important;color:var(--muted);font-family:var(--font-ui)!important;font-size:.85rem!important}.demo-card{padding:1.35rem 1.5rem 1.5rem;border:1px solid var(--rule);border-radius:var(--radius-lg);background:var(--surface);box-shadow:0 12px 28px rgba(23,24,28,.06)}.demo-card .card-word{font-size:1.75rem}.demo-empty{color:var(--muted);font-size:.95rem;line-height:1.6}@media (min-width:56rem){.demo{grid-template-columns:1.35fr 1fr;gap:var(--space-6)}}.feature-grid{display:grid;grid-gap:1.75rem 1.5rem;gap:1.75rem 1.5rem}.feature-grid a{display:grid;grid-gap:.85rem;gap:.85rem;color:inherit;text-decoration:none}.feature-grid figure{margin:0;overflow:hidden;border-radius:var(--radius-md);background:var(--surface-cool);aspect-ratio:4/3}.feature-grid img{display:block;width:100%;height:100%;object-fit:cover;transition:transform .22s ease-out}.feature-grid a:hover img{transform:scale(1.015)}.feature-grid h3{margin:0;font-family:var(--font-reading);font-size:1.15rem;font-weight:500;letter-spacing:-.015em;line-height:1.25;transition:color .16s ease-out}.feature-grid a:hover h3{color:var(--accent)}.feature-grid p{margin:0;color:var(--muted);font-size:.9rem;line-height:1.5}.feature-grid .meta{color:var(--muted-light);font-size:.82rem}@media (min-width:48rem){.feature-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}.expr-preview{display:grid;grid-gap:0;gap:0;border-top:1px solid var(--rule)}.expr-preview>div{padding:1.5rem 0;border-bottom:1px solid var(--rule)}.expr-preview .es{margin:0;font-family:var(--font-reading);font-size:1.35rem;line-height:1.4}.expr-preview .en{margin:.3rem 0 0;color:var(--ink-soft);font-size:1rem}.expr-preview .why{margin:.6rem 0 0;color:var(--muted);font-size:.92rem;line-height:1.6;max-width:44rem}.expr-preview .where{display:inline-block;margin-top:.7rem;color:var(--accent);font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.collection-feature{display:grid;grid-gap:var(--space-5);gap:var(--space-5);align-items:center}.collection-feature figure{margin:0;overflow:hidden;border-radius:var(--radius-md);background:var(--surface-cool);aspect-ratio:16/10}.collection-feature img{display:block;width:100%;height:100%;object-fit:cover}.collection-feature h2{margin:.5rem 0 0;font-family:var(--font-reading);font-size:clamp(1.75rem,4vw,2.15rem);font-weight:500;letter-spacing:-.022em}.collection-feature p{margin:.85rem 0 0;color:var(--muted);line-height:1.7}.collection-feature .meta{margin-top:1rem;color:var(--muted-light);font-size:.85rem}@media (min-width:56rem){.collection-feature{grid-template-columns:1fr 1fr;gap:var(--space-6)}}.grammar-preview{display:grid;grid-gap:0;gap:0;border-top:1px solid var(--rule)}.grammar-preview a{display:flex;flex-wrap:wrap;gap:.4rem 1rem;align-items:baseline;padding:1.1rem 0;border-bottom:1px solid var(--rule);color:inherit;text-decoration:none}.grammar-preview strong{font-size:1.05rem;font-weight:600}.grammar-preview .level{color:var(--muted-light);font-size:.78rem;font-weight:700;letter-spacing:.05em}.grammar-preview span:last-child{color:var(--muted);font-size:.92rem}.grammar-preview a:hover strong{color:var(--accent)}.made-by{max-width:40rem}.made-by h2{margin:0;font-family:var(--font-reading);font-size:clamp(1.5rem,3.5vw,1.9rem);font-weight:500;letter-spacing:-.02em;line-height:1.25}.made-by p{margin:.85rem 0 0;color:var(--muted);font-size:1.02rem;line-height:1.7}.page-head{padding:clamp(2.5rem,6vw,4rem) 0 var(--space-5)}.page-head h1{margin:0;font-family:var(--font-reading);font-size:clamp(2.2rem,5.5vw,3rem);font-weight:500;letter-spacing:-.025em;line-height:1.1}.page-head p{max-width:36rem;margin:1rem 0 0;color:var(--muted);font-size:1.02rem;line-height:1.65}.page-head .filters{margin-top:2rem}.page-head .chip{border-color:var(--rule-strong);color:var(--ink-soft)}.page-head .chip:hover{border-color:var(--accent);color:var(--accent)}.page-head .chip.on{border-color:var(--accent);background:var(--accent);color:#fff}.page-head .filter-sep{background:var(--rule)}.catalog.grid{display:grid;grid-gap:2rem 1.5rem;gap:2rem 1.5rem;grid-template-columns:repeat(auto-fill,minmax(15rem,1fr))}.catalog.grid a{display:grid;grid-gap:.8rem;gap:.8rem;align-content:start;padding:0;border:0;background:none;border-radius:0}.catalog.grid a:hover{transform:none}.catalog figure,.catalog.grid figure{margin:0;overflow:hidden;border-radius:var(--radius-md);background:var(--surface-cool);aspect-ratio:4/3}.catalog.grid img{display:block;width:100%;height:100%;object-fit:cover;transition:transform .22s ease-out}.catalog.grid a:hover img{transform:scale(1.015)}.catalog.grid .catalog-body{gap:.35rem}.catalog.grid .catalog-title{font-family:var(--font-reading);font-size:1.05rem;font-weight:500;letter-spacing:-.012em;line-height:1.3}.catalog-teaser{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;color:var(--muted);font-size:.88rem;line-height:1.5}.catalog.grid .meta{font-size:.75rem}.thumb-fill{display:block;width:100%;height:100%;background:linear-gradient(140deg,#d8cdb8,#b9c7c2)}.btn.secondary{background:var(--surface)}.page{margin-inline:auto;padding-bottom:var(--space-7)}.page,.page.wide{width:min(calc(100% - 2.5rem),var(--measure-wide))}.page.article{width:min(calc(100% - 2.5rem),48rem)}.page.read{width:min(calc(100% - 2.5rem),var(--measure-read))}.read-progress{position:fixed;top:56px;left:0;right:0;z-index:30;height:2px;background:transparent;pointer-events:none}.read-progress span{display:block;height:100%;background:var(--accent);transform-origin:left;transition:transform 90ms linear}.page.read .reading p{font-size:clamp(1.18rem,3.6vw,1.32rem);line-height:1.82;margin-bottom:1.75em}.page.read .reading{margin-top:clamp(2rem,6vw,3rem)}.page.read .reading-head{padding-top:var(--space-5)}.page.read .hero-image{margin-top:var(--space-5);aspect-ratio:16/10}.card-more{margin-top:.9rem}.card-more summary{cursor:pointer;color:var(--muted);font-size:.8rem;font-weight:600;list-style:none}.card-more summary::-webkit-details-marker{display:none}.card-more summary:after{content:" ↓"}.card-more[open] summary:after{content:" ↑"}.card-more summary:hover{color:var(--accent)}.popover,.sheet{border-radius:var(--radius-lg)}.popover{box-shadow:0 16px 40px rgba(23,24,28,.1),0 2px 6px rgba(23,24,28,.05)}.sheet:before{content:"";display:block;width:36px;height:4px;margin:0 auto 1rem;border-radius:999px;background:var(--rule-strong)}.collection-head{display:grid;grid-gap:var(--space-4);gap:var(--space-4);padding:var(--space-5) 0 var(--space-6)}.collection-head figure{margin:0;overflow:hidden;border-radius:var(--radius-md);background:var(--surface-cool);aspect-ratio:16/10}.collection-head img{display:block;width:100%;height:100%;object-fit:cover}.collection-head h1{margin:.5rem 0 0;font-family:var(--font-reading);font-size:clamp(2rem,5vw,2.8rem);font-weight:500;letter-spacing:-.025em;line-height:1.1}.collection-head p{max-width:38rem;margin:1rem 0 0;color:var(--muted);line-height:1.7}.collection-head .meta{margin-top:1rem;color:var(--muted-light);font-size:.85rem}@media (min-width:56rem){.collection-head{grid-template-columns:1fr 1fr;gap:var(--space-6);align-items:center}}.toc{margin:0;padding:0;list-style:none;border-top:1px solid var(--rule)}.toc li{border-bottom:1px solid var(--rule)}.toc a{display:grid;grid-template-columns:2.5rem 1fr;grid-gap:.25rem 1rem;gap:.25rem 1rem;align-items:baseline;padding:1.35rem 0;color:inherit;text-decoration:none}.toc-num{color:var(--muted-light);font-size:.85rem;font-weight:700;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.toc-body{display:grid;grid-gap:.3rem;gap:.3rem}.toc-title{font-family:var(--font-reading);font-size:1.3rem;font-weight:500;letter-spacing:-.015em;transition:color .16s ease-out}.toc a:hover .toc-title{color:var(--accent)}.toc-teaser{color:var(--muted);font-size:.95rem;line-height:1.55}.toc-meta{grid-column:2;color:var(--muted-light);font-size:.82rem}@media (min-width:48rem){.toc a{grid-template-columns:2.5rem 1fr auto}.toc-meta{grid-column:3;grid-row:1}}.site-header{position:-webkit-sticky;position:sticky;top:0;z-index:40;border-bottom:1px solid var(--rule);background:hsla(0,0%,100%,.92);-webkit-backdrop-filter:saturate(180%) blur(8px);backdrop-filter:saturate(180%) blur(8px);color:var(--ink)}.site-header-inner{width:min(calc(100% - 2.5rem),var(--measure-wide));min-height:56px;gap:2rem}.brand{color:var(--ink);font-size:1.1rem;letter-spacing:-.015em}.site-header nav{gap:1.5rem}.site-header nav a{color:var(--muted);font-size:.9rem}.site-header nav a:hover{color:var(--ink)}.site-header nav a.on{color:var(--ink);border-bottom-color:var(--accent)}@media (min-width:40rem){.site-header-inner{min-height:64px}}.site-footer{margin-top:0;border-top:1px solid var(--rule);background:var(--surface)}.site-footer-inner{width:min(calc(100% - 2.5rem),var(--measure-wide))}.book{margin-top:var(--space-5)}.book-spread{display:grid;grid-gap:var(--space-4);gap:var(--space-4);align-items:start}@media (min-width:56rem){.book-spread{grid-template-columns:1fr 1fr;gap:var(--space-6);align-items:center}}.book-spread{animation:page-in .22s ease-out}.book-spread.turn-next{animation:page-next .22s ease-out}.book-spread.turn-prev{animation:page-prev .22s ease-out}@keyframes page-in{0%{opacity:0}to{opacity:1}}@keyframes page-next{0%{opacity:0;transform:translateX(2.5%)}to{opacity:1;transform:none}}@keyframes page-prev{0%{opacity:0;transform:translateX(-2.5%)}to{opacity:1;transform:none}}@media (prefers-reduced-motion:reduce){.book-spread,.book-spread.turn-next,.book-spread.turn-prev{animation:none}}.book-picture{overflow:hidden;border:1px solid var(--rule);border-radius:var(--radius-md);background:var(--surface-cool);aspect-ratio:4/3}.book-picture img{display:block;width:100%;height:100%;object-fit:cover}.book-picture-empty{display:block;width:100%;height:100%;background:linear-gradient(140deg,#eef0f3,#e3e7ea)}.book-text .reading p{font-size:clamp(1.3rem,4vw,1.5rem);line-height:1.75;margin-bottom:1.15em}.book-text .reading p:last-child{margin-bottom:0}.book-caption{margin:1.25rem 0 0;padding-top:1rem;color:var(--muted);font-family:var(--font-ui);font-size:.88rem;line-height:1.55}.book-caption,.book-nav{border-top:1px solid var(--rule)}.book-nav{display:flex;gap:1rem;align-items:center;justify-content:space-between;margin-top:var(--space-5);padding-top:var(--space-4)}.book-arrow{display:grid;place-items:center;width:48px;height:48px;border:1px solid var(--rule-strong);border-radius:999px;background:var(--surface);color:var(--ink);cursor:pointer;font-size:1.1rem}.book-arrow:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}.book-arrow:disabled{opacity:.35;cursor:default}.book-finish{min-height:48px}.book-dots{display:flex;gap:.5rem;margin:0;padding:0;list-style:none}.book-dots button{display:block;width:10px;height:10px;padding:0;border:0;border-radius:999px;background:var(--rule-strong);cursor:pointer;transition:background-color .16s ease-out,transform .16s ease-out}.book-dots button:hover{background:var(--muted)}.book-dots button.on{background:var(--accent);transform:scale(1.25)}.book-count{margin-top:1rem;color:var(--muted-light);font-size:.82rem;text-align:center}.printable{width:min(calc(100% - 2.5rem),52rem);margin-inline:auto;padding-bottom:var(--space-7)}.print-head{padding:clamp(2.5rem,6vw,4rem) 0 var(--space-5)}.print-head h1{margin:.5rem 0 0;font-family:var(--font-reading);font-size:clamp(2rem,5vw,2.6rem);font-weight:500;letter-spacing:-.025em}.print-head>p{max-width:38rem;margin:1rem 0 1.5rem;color:var(--muted);line-height:1.65}.sheet{display:grid;grid-gap:1.5rem;gap:1.5rem}.sheet-page{position:relative;aspect-ratio:210/297;overflow:hidden;border:1px solid var(--rule);border-radius:var(--radius-sm);background-color:var(--surface-cool);background-size:cover;background-position:50%;color:#fff}.sheet-page.plain{background:var(--surface);color:var(--ink);padding:8% 9%}.sheet-page .scrim{position:absolute;left:0;right:0;height:58%}.sheet-page .scrim.bottom{bottom:0;background:linear-gradient(0deg,rgba(12,16,22,.88),rgba(12,16,22,.7) 34%,rgba(12,16,22,.25) 68%,rgba(12,16,22,0))}.sheet-page .scrim.top{top:0;background:linear-gradient(180deg,rgba(12,16,22,.88),rgba(12,16,22,.7) 34%,rgba(12,16,22,.25) 68%,rgba(12,16,22,0))}.spread-words{position:absolute;left:8%;right:8%;bottom:6%}.spread-words p[lang=es]{margin:0 0 .35rem;font-family:var(--font-reading);font-size:clamp(.95rem,2.4vw,1.35rem);line-height:1.45}.spread-words .en{margin:0 0 1rem;color:hsla(0,0%,100%,.82);font-size:clamp(.7rem,1.6vw,.9rem);font-style:italic;line-height:1.35}.cover-words{position:absolute;top:8%;left:10%;right:10%;text-align:center}.cover-words h2{margin:0;font-family:var(--font-reading);font-size:clamp(1.8rem,5.5vw,3rem);font-weight:500;line-height:1.05}.cover-words .rule{display:block;width:4rem;height:1px;margin:1rem auto;background:hsla(0,0%,100%,.7)}.cover-words p{margin:0;font-family:var(--font-reading);font-style:italic}.cover-foot{position:absolute;left:0;right:0;bottom:4%;margin:0;text-align:center;font-size:.8rem;opacity:.9}.folio{position:absolute;right:5%;bottom:3%;font-size:.75rem;opacity:.75}.sheet-page.plain h2{margin:0 0 1.25rem;color:var(--muted);font-size:.75rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase}.vocab-cols{column-count:2;column-gap:2rem}.vocab-cols>div{page-break-inside:avoid;break-inside:avoid;margin-bottom:.85rem}.vocab-cols .es{margin:0;font-family:var(--font-reading);font-size:1.02rem}.vocab-cols .en{margin:0;color:var(--ink-soft);font-size:.85rem}.vocab-cols .base{margin:0;color:var(--muted-light);font-size:.75rem}.print-questions{margin:0;padding-left:1.2rem}.print-questions li{margin-bottom:1.5rem}.print-questions p{margin:0 0 .6rem;font-family:var(--font-reading);font-size:1.05rem}.rule-line{display:block;height:1.6rem;border-bottom:1px solid var(--rule-strong)}.print-answers{margin:0;padding-left:1.2rem;color:var(--ink-soft)}.print-answers li{margin-bottom:.5rem}.sheet-foot{position:absolute;left:9%;bottom:5%;margin:0;color:var(--muted-light);font-size:.7rem;letter-spacing:.06em}@media print{@page{size:A4;margin:0}body{background:#fff}.no-print,.site-footer,.site-header{display:none!important}.printable{width:100%;padding:0}.sheet{display:block;gap:0}.sheet-page{aspect-ratio:auto;width:210mm;height:297mm;border:0;border-radius:0;page-break-after:always;print-color-adjust:exact;-webkit-print-color-adjust:exact}.sheet-page:last-child{page-break-after:auto}.sheet-page.plain{padding:20mm 18mm}.spread-words p[lang=es]{font-size:19pt}.spread-words .en{font-size:12.5pt}.cover-words h2{font-size:40pt}}.print-link{color:var(--accent);font-weight:600;text-decoration:none}.print-link:before{content:"· ";color:var(--muted-light)}.exam{margin-top:var(--space-5)}.exam-task{margin-bottom:var(--space-6);padding-top:var(--space-5);border-top:1px solid var(--rule)}.exam-task:first-child{border-top:0;padding-top:0}.exam-instructions{margin:.35rem 0 var(--space-4);color:var(--ink-soft);font-size:.98rem;line-height:1.6}.exam-text{padding:1.25rem 1.4rem;border:1px solid var(--rule);border-radius:var(--radius-md);background:var(--surface-cool)}.exam-text p{margin:0 0 1rem;font-family:var(--font-reading);font-size:1.08rem;line-height:1.75}.exam-text p:last-child{margin-bottom:0}.exam-text.gapped p{line-height:2}.exam-sources{display:grid;grid-gap:.85rem;gap:.85rem;margin-bottom:var(--space-4)}.exam-sources article{padding:1.1rem 1.25rem;border:1px solid var(--rule);border-radius:var(--radius-md);background:var(--surface-cool)}.exam-sources h3{margin:0 0 .5rem;font-size:1rem;font-weight:650}.exam-sources p{margin:0;font-family:var(--font-reading);font-size:1rem;line-height:1.65}.exam-sources .tag{display:inline-grid;place-items:center;width:24px;height:24px;margin-right:.35rem;border-radius:999px;background:var(--accent);color:#fff;font-size:.75rem;font-weight:700}.exam-questions{margin:var(--space-4) 0 0;padding-left:1.4rem}.exam-questions>li{margin-bottom:1.75rem}.exam-questions .q{margin:0 0 .75rem;font-size:1.02rem;font-weight:600;line-height:1.5}.match-row{display:flex;flex-wrap:wrap;gap:.5rem}.match-btn{min-width:48px;min-height:48px;padding:.6rem 1rem;border:1px solid var(--rule-strong);background:var(--surface);font-weight:650}.match-btn.wide{min-width:5.5rem;font-family:var(--font-reading);font-weight:500}.match-btn:hover:not(:disabled){border-color:var(--accent)}.match-btn:disabled{cursor:default}.match-btn.chosen{border-color:var(--accent);background:var(--accent-soft)}.match-btn.right{border-color:var(--correct-line);background:var(--correct-soft);color:#24583f}.match-btn.wrong{border-color:var(--wrong-line);background:var(--wrong-soft);color:#7d342f}.exam-why{margin:.7rem 0 0;padding-left:.8rem;border-left:2px solid var(--phrase);color:var(--muted);font-size:.88rem;line-height:1.6}.exam-score{margin-bottom:var(--space-6);padding:1.5rem;border-radius:var(--radius-md);background:var(--surface-cool)}.exam-score h2{margin:.2rem 0 .75rem;font-family:var(--font-reading);font-size:2.4rem;font-weight:600;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.exam-score ul{margin:0 0 1rem;padding-left:1.1rem;color:var(--ink-soft)}.exam-score li{margin-bottom:.3rem}.exam-submit{display:flex;flex-wrap:wrap;gap:1rem;align-items:center;justify-content:space-between;padding-top:var(--space-4);border-top:1px solid var(--rule)}.exam-submit .results-note{margin:0}@media (min-width:48rem){.exam-sources{grid-template-columns:repeat(3,minmax(0,1fr))}}.exercise-story{padding:1.5rem 1.6rem;border:1px solid var(--rule);border-radius:var(--radius-md);background:var(--surface-cool)}.exercise-story p{margin:0 0 1.1rem;font-family:var(--font-reading);font-size:1.12rem;line-height:2.4}.exercise-story p:last-child{margin-bottom:0}.gap{white-space:nowrap}.gap-no{align-self:center;display:inline-grid;place-items:center;width:18px;height:18px;border-radius:999px;background:var(--rule-strong);color:#fff;font-size:.62rem;font-weight:700}.gap .cue,.gap-no{font-family:var(--font-ui)}.gap .cue{color:var(--muted);font-size:.78rem;font-style:italic}.gap .grow-field{min-width:6.5rem;padding:.1rem .3rem;border:0;border-bottom:1.5px solid var(--rule-strong);background:transparent;color:var(--accent);font-family:var(--font-reading);font-size:1.05rem;text-align:center}.gap input:focus{outline:none;border-bottom-color:var(--accent)}.gap input:focus-visible{outline:2px solid var(--focus);outline-offset:3px}.gap input:disabled{opacity:1}.gap.v-right .gap-no{background:var(--correct)}.gap.v-right input{color:var(--correct);border-bottom-color:var(--correct-line)}.gap.v-empty .gap-no,.gap.v-wrong .gap-no{background:var(--wrong)}.gap.v-empty input,.gap.v-wrong input{color:var(--wrong);border-bottom-color:var(--wrong-line)}.gap.v-accent .gap-no{background:#d8b46a}.gap.v-accent input{color:var(--warning);border-bottom-color:#d8b46a}.story-feedback{margin:var(--space-4) 0 0;padding-left:1.6rem}.story-feedback li{margin-bottom:.7rem;color:var(--muted);font-size:.9rem;line-height:1.6}.story-feedback strong{color:var(--correct);font-family:var(--font-reading);font-size:1rem}.grow-wrap{position:relative;display:inline-block;max-width:100%;vertical-align:baseline}.grow-mirror{position:absolute;top:0;left:0;visibility:hidden;pointer-events:none;white-space:pre;letter-spacing:normal}.grow-field,.grow-mirror{font-family:var(--font-reading);font-size:1.05rem;line-height:1.6;padding:.05rem .35rem}.grow-field{display:inline-block;vertical-align:bottom;box-sizing:content-box;max-width:100%;min-height:1.75rem;margin:0 .15rem;border:0;border-bottom:1.5px solid var(--rule-strong);border-radius:0;background:transparent;color:var(--accent);overflow:hidden;resize:none;white-space:pre-wrap;word-break:break-word;transition:width var(--fast) var(--ease),border-color var(--fast) var(--ease)}.grow-field:focus{outline:none;border-bottom-color:var(--accent)}.grow-field:focus-visible{outline:2px solid var(--focus);outline-offset:4px}.grow-field:disabled{color:var(--ink);opacity:1;-webkit-text-fill-color:var(--ink)}.grow-wrap.joined{margin:0}.grow-wrap.joined .grow-field{margin:0;padding:.1rem .2rem}.exercise-line{line-height:2.1}.exercise-items>li{align-items:baseline;padding-block:.15rem}.v-right .exercise-line .grow-field{color:var(--correct)}.v-empty .exercise-line .grow-field,.v-wrong .exercise-line .grow-field{color:var(--wrong)}.v-accent .exercise-line .grow-field{color:var(--warning);border-bottom-color:#d8b46a}.gap{display:inline-flex;align-items:baseline;gap:.25rem;white-space:normal}.gap .gap-no{align-self:center}@media (max-width:560px){.grow-wrap{display:block;margin-top:.35rem}.grow-field{width:100%!important;margin-left:0}}.browser{display:grid;grid-template-columns:minmax(0,1fr) 18rem;grid-gap:clamp(2rem,5vw,4rem);gap:clamp(2rem,5vw,4rem);align-items:start;margin-top:var(--space-5)}@media (max-width:900px){.browser{grid-template-columns:1fr;gap:var(--space-5)}.browser-side{order:-1;position:static}}.browser-status{display:flex;align-items:center;gap:.9rem;min-height:2rem;margin-bottom:1.25rem;color:var(--muted);font-family:var(--font-ui);font-size:.82rem;letter-spacing:.02em}.browser-empty{padding:3rem 0;color:var(--muted);text-align:center}.browser-list{display:grid;grid-gap:1rem;gap:1rem;margin:0;padding:0;list-style:none}.browser-card{display:flex;gap:1.1rem;padding:1.4rem 1.6rem;border:1px solid var(--rule);border-radius:var(--radius-md);background:#fff;transition:border-color .15s ease,box-shadow .15s ease}.browser-card:hover{border-color:var(--rule-strong);box-shadow:0 2px 14px rgba(20,24,32,.05)}.browser-card .dot{flex:none;width:10px;height:10px;margin-top:.5rem;border-radius:999px;background:var(--rule-strong)}.browser-card.k-reading .dot{background:#7c4dff}.browser-card.k-grammar .dot{background:#e0a300}.browser-card.k-exercise .dot{background:#2f9e8f}.browser-card.k-expressions .dot{background:#d2557a}.browser-card.k-exam .dot{background:#4b7bd8}.browser-card.k-collection .dot{background:#8a8f98}.browser-card-body{min-width:0;flex:1 1}.browser-kind{display:flex;flex-wrap:wrap;align-items:center;gap:.85rem;margin:0 0 .5rem;color:var(--muted);font-family:var(--font-ui);font-size:.68rem;font-weight:600;letter-spacing:.09em;text-transform:uppercase}.browser-kind .count,.browser-kind .level{color:var(--ink-soft);font-weight:500;letter-spacing:.05em}.browser-card h2{margin:0 0 .45rem;font-family:var(--font-reading);font-size:1.15rem;font-weight:600;line-height:1.35;letter-spacing:-.01em}.browser-card h2 a{color:var(--ink);text-decoration:none}.browser-card h2 a:hover{color:var(--accent)}.browser-blurb{margin:0 0 .85rem;color:var(--ink-soft);font-size:.94rem;line-height:1.6}.browser-go{display:inline-block;font-family:var(--font-ui);font-size:.7rem;font-weight:600;letter-spacing:.09em;text-transform:uppercase;text-decoration:none;color:var(--accent)}.browser-go:hover{text-decoration:underline}.browser-results>.btn.ghost{margin-top:1.5rem}.browser-side{position:-webkit-sticky;position:sticky;top:5rem;padding:1.6rem 1.5rem;border:1px solid var(--rule);border-radius:var(--radius-md);background:#fff}.browser-search input{width:100%;padding:.72rem 1rem;border:1px solid var(--rule-strong);border-radius:999px;background:transparent;color:var(--ink);font-family:var(--font-ui);font-size:.9rem}.browser-search input::placeholder{color:var(--muted)}.browser-search input:focus-visible{outline:2px solid var(--focus);outline-offset:2px}.browser-side-title{margin:2rem 0 .9rem;font-family:var(--font-ui);font-size:.72rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--muted)}.pills{display:flex;flex-wrap:wrap;gap:.7rem}.pill{width:3.6rem;height:3.6rem;border:0;border-radius:999px;background:var(--pill,var(--rule-strong));color:#fff;font-family:var(--font-ui);font-size:.8rem;font-weight:600;cursor:pointer;opacity:.82;box-shadow:0 0 0 0 transparent;transition:opacity .15s ease,transform .15s ease,box-shadow .15s ease}.pill:hover{opacity:1;transform:translateY(-1px)}.pill.on{opacity:1;transform:scale(1.04);box-shadow:0 0 0 3px #fff,0 0 0 5px var(--pill)}.pill:focus-visible{outline:2px solid var(--focus);outline-offset:4px}.pill.p-A1A2{--pill:#7c4dff}.pill.p-B1{--pill:#3aa6d8}.pill.p-B2{--pill:#e0a300}.side-list{margin:0;padding:0;list-style:none}.side-list li+li{border-top:1px solid var(--rule)}.side-list button{display:flex;justify-content:space-between;align-items:center;gap:1rem;width:100%;padding:.6rem 0;border:0;background:none;color:var(--ink-soft);font-family:var(--font-ui);font-size:.9rem;text-align:left;cursor:pointer}.side-list button:hover{color:var(--accent)}.side-list button.on{color:var(--accent);font-weight:600}.side-list .n{flex:none;color:var(--muted);font-size:.8rem;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.side-list .label{display:flex;align-items:center;gap:.6rem}.side-list .label:before{content:"";width:8px;height:8px;flex:none;border-radius:999px;background:var(--kind,var(--rule-strong))}.side-list .k-reading{--kind:#7c4dff}.side-list .k-grammar{--kind:#e0a300}.side-list .k-exercise{--kind:#2f9e8f}.side-list .k-expressions{--kind:#d2557a}.side-list .k-exam{--kind:#4b7bd8}.side-list .k-collection{--kind:#8a8f98}.side-list button.on .n{color:var(--accent)}.chips{display:flex;flex-wrap:wrap;gap:.45rem}.chip.clear,.chips .chip{padding:.35rem .75rem;border:1px solid var(--rule-strong);border-radius:999px;background:transparent;color:var(--ink-soft);font-family:var(--font-ui);font-size:.78rem;line-height:1.4;cursor:pointer}.chip.clear:hover,.chips .chip:hover{border-color:var(--accent);color:var(--accent)}.chips .chip.on{background:var(--accent);border-color:var(--accent);color:#fff}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}@media (max-width:560px){.browser-card{padding:1.15rem 1.2rem;gap:.85rem}.browser-side{padding:1.25rem 1.2rem}.pill{width:3.2rem;height:3.2rem}}.home-hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);grid-gap:clamp(2rem,6vw,5rem);gap:clamp(2rem,6vw,5rem);align-items:center;padding:clamp(3rem,7vw,5.5rem) 0 clamp(2.5rem,5vw,4rem)}@media (max-width:900px){.home-hero{grid-template-columns:1fr;gap:2.5rem;padding-top:2.5rem}}.eyebrow{margin:0 0 1.1rem;color:var(--accent);font-size:.72rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase}.home-hero-copy h1{margin:0;font-family:var(--font-reading);font-size:clamp(2.5rem,5.2vw,3.75rem);font-weight:500;line-height:1.06;letter-spacing:-.032em;text-wrap:balance}.home-hero-copy .lead{max-width:30rem;margin:1.35rem 0 0;color:var(--muted);font-size:1.08rem;line-height:1.62}.home-hero-actions{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:2rem}.home-hero-meta{display:flex;flex-wrap:wrap;gap:1.5rem;margin:2rem 0 0;color:var(--muted-light);font-size:.82rem}.home-hero-demo{min-width:0}.figures{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-gap:1.5rem;gap:1.5rem;padding:2.25rem 0;border-block:1px solid var(--rule)}.figures div{display:grid;grid-gap:.3rem;gap:.3rem}.figures strong{font-family:var(--font-reading);font-size:1.9rem;font-weight:500;letter-spacing:-.02em;line-height:1}.figures span{color:var(--muted);font-size:.82rem;line-height:1.4}@media (max-width:640px){.figures{grid-template-columns:repeat(2,1fr);gap:1.75rem 1rem}.figures strong{font-size:1.6rem}}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;min-height:44px;padding:0 1.35rem;border:1px solid transparent;border-radius:999px;font-family:var(--font-ui);font-size:.92rem;font-weight:500;text-decoration:none;cursor:pointer;transition:background var(--fast) var(--ease),border-color var(--fast) var(--ease),color var(--fast) var(--ease),transform var(--fast) var(--ease)}.btn:active{transform:translateY(1px)}.btn.primary{background:var(--accent);color:#fff}.btn.primary:hover{background:var(--accent-hover);color:#fff}.btn.primary[disabled]{background:var(--rule-strong);color:var(--muted);cursor:default}.btn.secondary{border-color:var(--rule-strong);background:transparent;color:var(--ink)}.btn.secondary:hover{border-color:var(--ink-soft);color:var(--ink)}.btn.ghost{border-color:var(--rule);background:transparent;color:var(--ink-soft)}.btn.ghost:hover{border-color:var(--rule-strong);color:var(--ink)}.catalog.grid{gap:2.75rem 1.75rem}.catalog.grid a{transition:transform var(--base) var(--ease)}.catalog.grid figure{border-radius:var(--radius-md);background:var(--surface-sunk)}.catalog.grid img{transition:transform .4s var(--ease)}.catalog.grid a:hover img{transform:scale(1.03)}.catalog.grid h3{font-family:var(--font-reading);font-weight:500;letter-spacing:-.015em}.catalog .meta{color:var(--muted);font-size:.7rem;font-weight:600;letter-spacing:.09em;text-transform:uppercase}.level{font-feature-settings:"tnum";font-variant-numeric:tabular-nums;letter-spacing:.06em}.masthead h1,.page-head h1{font-family:var(--font-reading);font-weight:500;letter-spacing:-.03em}.masthead p,.page-head p,.reading-lead{color:var(--muted)}.browser-card,.browser-side{box-shadow:var(--shadow-sm)}.browser-card:hover{box-shadow:var(--shadow-md)}.v-right .exercise-line .grow-field{border-bottom-color:var(--correct-line)}.v-empty .exercise-line .grow-field,.v-wrong .exercise-line .grow-field{border-bottom-color:var(--wrong-line)}.exercise-feedback{padding:.65rem .85rem;border-radius:var(--radius-sm);background:var(--surface-cool);color:var(--ink-soft)}.exercise-feedback strong{color:var(--ink)}.home-hero-demo .demo{grid-template-columns:1fr!important;gap:1rem}.home-hero-demo .demo-card,.home-hero-demo .demo-paper{min-width:0}.home-hero-demo .demo-paper p{font-size:clamp(1.1rem,2.2vw,1.3rem);line-height:1.7}.home-hero-demo .demo-card .card-word{font-size:1.35rem}body,html{overflow-x:clip}.band,.figures,.home-hero,.home-hero>*{min-width:0}.home-hero{position:relative}.home-hero:before{content:"";position:absolute;z-index:-1;inset:-1px 0 0;background:radial-gradient(60rem 26rem at 22% 0,#f0efff 0,rgba(240,239,255,0) 62%),radial-gradient(44rem 22rem at 88% 12%,#eef6fb 0,rgba(238,246,251,0) 60%);box-shadow:0 0 0 100vmax #f7f7fd;-webkit-clip-path:inset(0 -100vmax);clip-path:inset(0 -100vmax)}.figures div{position:relative;padding-left:.9rem}.figures div:before{content:"";position:absolute;left:0;top:.35rem;bottom:.35rem;width:3px;border-radius:2px;background:var(--tint,var(--rule-strong))}.figures div:first-child{--tint:#7c4dff}.figures div:nth-child(2){--tint:#e0a300}.figures div:nth-child(3){--tint:#d2557a}.figures div:nth-child(4){--tint:#2f9e8f}.level-chip{display:inline-flex;align-items:center;padding:.15rem .5rem;border-radius:999px;background:var(--chip-bg,var(--surface-cool));color:var(--chip-ink,var(--muted));font-size:.68rem;font-weight:700;letter-spacing:.07em}.level-chip.l-a{--chip-bg:#f1efff;--chip-ink:#5b46c4}.level-chip.l-b1{--chip-bg:#e9f4fa;--chip-ink:#2a6f92}.level-chip.l-b2{--chip-bg:#fbf1dc;--chip-ink:#8a6412}.band-head h2{position:relative;padding-top:1.1rem}.band-head h2:before{content:"";position:absolute;top:0;left:0;width:2.25rem;height:3px;border-radius:2px;background:var(--accent)}.catalog.grid a figure,.feature-grid a figure{position:relative;overflow:hidden}.catalog.grid a figure:after,.feature-grid a figure:after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform var(--base) var(--ease)}.catalog.grid a:hover figure:after,.feature-grid a:hover figure:after{transform:scaleX(1)}.quote-block{border-left:3px solid var(--accent-line);padding-left:1.25rem}.hint-wrap{display:inline-flex;align-items:baseline;gap:.4rem}.hint-btn{display:inline-grid;place-items:center;width:1.15rem;height:1.15rem;padding:0;border:1px solid var(--rule-strong);border-radius:999px;background:transparent;color:var(--muted);font-family:var(--font-ui);font-size:.68rem;font-style:italic;font-weight:700;line-height:1;cursor:pointer;transform:translateY(-1px);transition:border-color var(--fast) var(--ease),color var(--fast) var(--ease),background var(--fast) var(--ease)}.hint-btn:hover{border-color:var(--accent);color:var(--accent)}.hint-btn.on{border-color:var(--accent);background:var(--accent);color:#fff}.hint-btn:focus-visible{outline:2px solid var(--focus);outline-offset:2px}.hint-text{color:var(--accent);font-family:var(--font-ui);font-size:.76rem;font-style:normal;white-space:nowrap}@media (max-width:560px){.hint-text{white-space:normal}}.exercise-base{position:-webkit-sticky;position:sticky;top:4.5rem;z-index:5;margin:1.5rem 0 2rem;padding:1rem 1.25rem;border:1px solid var(--accent-line);border-radius:var(--radius-md);background:var(--accent-soft);color:var(--ink);font-family:var(--font-reading);font-size:1.22rem;line-height:1.5}.exercise-base-label{display:block;margin-bottom:.3rem;color:var(--accent);font-family:var(--font-ui);font-size:.66rem;font-weight:700;letter-spacing:.11em;text-transform:uppercase}.exercise-items .cue{font-style:normal}.word-bank{position:-webkit-sticky;position:sticky;top:60px;z-index:20;margin:1.25rem 0 1.75rem;padding:.9rem 1.15rem 1rem;border:1px solid var(--rule);border-radius:var(--radius-md);background:rgba(246,247,249,.94);-webkit-backdrop-filter:saturate(180%) blur(10px);backdrop-filter:saturate(180%) blur(10px);box-shadow:0 6px 18px -12px rgba(16,17,20,.35);max-height:34vh;overflow-y:auto}.word-bank-label{margin:0 0 .75rem;color:var(--muted);font-family:var(--font-ui);font-size:.78rem;line-height:1.45}.word-bank ul{display:flex;flex-wrap:wrap;gap:.5rem;margin:0;padding:0;list-style:none}.bank-chip{padding:.4rem .8rem;border:1px solid var(--rule-strong);border-radius:999px;background:var(--paper);color:var(--ink);font-family:var(--font-reading);font-size:1rem;cursor:-webkit-grab;cursor:grab;transition:border-color var(--fast) var(--ease),color var(--fast) var(--ease),opacity var(--fast) var(--ease),transform var(--fast) var(--ease)}.bank-chip:hover{border-color:var(--accent);color:var(--accent)}.bank-chip:active{cursor:-webkit-grabbing;cursor:grabbing;transform:scale(.97)}.bank-chip:focus-visible{outline:2px solid var(--focus);outline-offset:2px}.bank-chip.used{opacity:.32;cursor:default;text-decoration:line-through}.bank-chip.used:hover{border-color:var(--rule-strong);color:var(--ink)}.grow-field:focus{border-bottom-width:2px}@media (min-width:34rem){.answers>*{flex:0 1 auto;min-width:8rem}.answer,.opt{justify-content:center;text-align:center}.answers .answer{width:auto}}.topic-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(17rem,1fr));grid-gap:1rem;gap:1rem;margin:var(--space-5) 0 0;padding:0;list-style:none}.topic-grid a{display:block;height:100%;padding:1.35rem 1.5rem;border:1px solid var(--rule);border-radius:var(--radius-md);background:#fff;text-decoration:none;transition:border-color var(--fast) var(--ease),box-shadow var(--fast) var(--ease)}.topic-grid a:hover{border-color:var(--rule-strong);box-shadow:var(--shadow-md)}.topic-grid h2{margin:.35rem 0 .4rem;font-family:var(--font-reading);font-size:1.2rem;font-weight:600;color:var(--ink)}.topic-tagline{margin:0;color:var(--ink-soft);font-size:.92rem;line-height:1.5}.topic-meta{gap:.8rem;margin:0;color:var(--muted);font-family:var(--font-ui);font-size:.7rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase}.mode-tabs,.topic-meta{display:flex;flex-wrap:wrap}.mode-tabs{gap:.4rem;margin:var(--space-4) 0 var(--space-5);padding-bottom:.6rem;border-bottom:1px solid var(--rule)}.mode-tabs button{padding:.5rem .95rem;border:1px solid transparent;border-radius:999px;background:none;color:var(--muted);font-family:var(--font-ui);font-size:.88rem;font-weight:500;cursor:pointer;transition:color var(--fast) var(--ease),background var(--fast) var(--ease)}.mode-tabs button:hover{color:var(--ink);background:var(--surface-cool)}.mode-tabs button.on{background:var(--accent);color:#fff}.vocab-list section{margin-bottom:var(--space-5)}.vocab-list h2{margin:0 0 .9rem;font-family:var(--font-ui);font-size:.72rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--muted)}.vocab-list ul{margin:0;padding:0;list-style:none}.vocab-list li{padding:.85rem 0;border-top:1px solid var(--rule)}.vocab-es{display:flex;flex-wrap:wrap;align-items:baseline;gap:.55rem;margin:0;font-family:var(--font-reading);font-size:1.15rem;font-weight:600}.vocab-tag{padding:.1rem .45rem;border-radius:999px;background:var(--surface-cool);color:var(--muted);font-family:var(--font-ui);font-size:.66rem;font-weight:600;letter-spacing:.05em;text-transform:uppercase}.vocab-en{margin:.15rem 0 0;color:var(--ink-soft);font-size:.98rem}.vocab-example{margin:.45rem 0 0;color:var(--ink-soft);font-family:var(--font-reading);font-size:.95rem;font-style:italic}.vocab-example span{font-style:normal;color:var(--muted)}.vocab-note{margin:.45rem 0 0;padding-left:.75rem;border-left:2px solid var(--accent-line);color:var(--muted);font-size:.86rem;line-height:1.55}.flash-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem;color:var(--muted);font-size:.8rem}.flash-head,.flash-swap{font-family:var(--font-ui)}.flash-swap{border:1px solid var(--rule-strong);border-radius:999px;padding:.35rem .8rem;background:none;color:var(--ink-soft);font-size:.78rem;cursor:pointer}.flash-swap:hover{border-color:var(--accent);color:var(--accent)}.flash-card{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.9rem;width:100%;min-height:15rem;padding:2rem 1.5rem;border:1px solid var(--rule-strong);border-radius:var(--radius-lg);background:#fff;box-shadow:var(--shadow-sm);cursor:pointer;text-align:center;transition:border-color var(--fast) var(--ease),box-shadow var(--fast) var(--ease)}.flash-card:hover{box-shadow:var(--shadow-md)}.flash-card.open{border-color:var(--accent-line)}.flash-word{font-family:var(--font-reading);font-size:clamp(1.8rem,6vw,2.6rem);font-weight:500;letter-spacing:-.02em;line-height:1.15}.flash-answer{padding-top:.9rem;border-top:1px solid var(--rule);width:min(100%,22rem);color:var(--accent);font-family:var(--font-ui);font-size:1.1rem;font-weight:600}.flash-example{color:var(--muted);font-family:var(--font-reading);font-size:.95rem;font-style:italic}.flash-hint{color:var(--muted-light);font-family:var(--font-ui);font-size:.78rem}.flash-actions{display:flex;flex-wrap:wrap;gap:.75rem;justify-content:center;margin-top:1.25rem}.flash-actions .btn{flex:1 1 9rem;max-width:14rem}.flash-done{padding:var(--space-5) 0;text-align:center}.flash-score{margin:0;font-family:var(--font-reading);font-size:clamp(2.4rem,10vw,3.4rem);font-weight:500}.flash-line{margin:.4rem 0 0;color:var(--muted)}.match-lead{color:var(--muted);font-size:.9rem}.match-cols{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-column-gap:clamp(3rem,9vw,6rem);column-gap:clamp(3rem,9vw,6rem);grid-row-gap:.6rem;row-gap:.6rem;margin-top:1.25rem}.match-cols ul{display:grid;grid-gap:.6rem;gap:.6rem;margin:0;padding:0;list-style:none}.match-btn{width:100%;min-height:52px;padding:.7rem .9rem;border:1px solid var(--rule);border-radius:var(--radius-md);background:#fff;color:var(--ink);font-family:var(--font-reading);font-size:1rem;line-height:1.35;cursor:pointer;transition:border-color var(--fast) var(--ease),background var(--fast) var(--ease),opacity var(--fast) var(--ease)}.match-btn:hover:not(:disabled){border-color:var(--rule-strong)}.match-btn.picked{border-color:var(--accent);background:var(--accent-soft)}.match-btn.miss{border-color:var(--wrong-line);background:var(--wrong-soft)}.match-btn.done{opacity:.32;cursor:default}.match-done{margin-top:1.5rem;text-align:center}.quiz-next{margin-top:1.25rem;text-align:center}.quiz-next .vocab-note{margin-bottom:1rem;text-align:left}.match-frame{position:relative;margin-top:1.25rem}.match-lines{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;overflow:visible}.match-lines path{animation:line-in .26s var(--ease)}@keyframes line-in{0%{opacity:0}to{opacity:1}}.match-cols{margin-top:0}.match-btn.done{opacity:.85;background:#fff;text-decoration:none}.match-btn.done:hover{opacity:.85}.mode-progress{height:3px;margin-bottom:var(--space-4);border-radius:2px;background:var(--rule);overflow:hidden}.mode-progress span{display:block;height:100%;background:var(--accent);transition:width var(--base) var(--ease)}.match-toggle{display:flex;align-items:center;gap:.55rem;margin:-.75rem 0 1.25rem;color:var(--ink-soft);font-family:var(--font-ui);font-size:.86rem;cursor:pointer}.match-cols.wide .match-btn{font-size:.94rem;line-height:1.4;text-align:left}.produce{padding-top:var(--space-2);text-align:center}.produce-prompt{margin:0 0 .4rem;font-family:var(--font-reading);font-size:clamp(1.7rem,5.5vw,2.4rem);font-weight:500;letter-spacing:-.02em}.produce-lead{max-width:28rem;margin:0 auto 1.5rem;color:var(--muted);font-size:.9rem;line-height:1.5}.produce-input{width:min(100%,22rem);padding:.7rem 1rem;border:1px solid var(--rule-strong);border-radius:var(--radius-md);background:transparent;color:var(--ink);font-family:var(--font-reading);font-size:1.15rem;text-align:center}.produce-input:focus-visible{outline:2px solid var(--focus);outline-offset:2px}.produce-input.right{border-color:var(--correct-line)}.produce-input.accent{border-color:#d8b46a}.produce-input.wrong{border-color:var(--wrong-line)}.produce .btn{margin-top:1.1rem}.produce-after{margin-top:1.25rem}.produce-verdict{margin:0 0 .5rem;font-family:var(--font-ui);font-size:.95rem}.produce-verdict strong{font-family:var(--font-reading);font-size:1.15rem}.produce-verdict.v-right{color:var(--correct)}.produce-verdict.v-accent{color:var(--warning)}.produce-verdict.v-wrong{color:var(--wrong)}.produce-example{margin:.3rem 0 0;color:var(--muted);font-family:var(--font-reading);font-style:italic}.produce-after .vocab-note{max-width:30rem;margin-inline:auto;text-align:left}.syn-list{display:flex;flex-wrap:wrap;gap:.5rem;justify-content:center;margin:0 0 .75rem;padding:0;list-style:none}.syn-list li{padding:.4rem .85rem;border:1px solid var(--accent-line);border-radius:999px;background:var(--accent-soft);color:var(--accent-hover);font-family:var(--font-reading);font-size:1.02rem}.gender{padding-top:var(--space-2);text-align:center}.gender-word{margin:0;font-family:var(--font-reading);font-size:clamp(2rem,7vw,3rem);font-weight:500}.gender-gloss{margin:.3rem 0 1.75rem;color:var(--muted)}.gender-buttons{display:flex;gap:.9rem;justify-content:center}.gender-btn{width:7rem;height:4.5rem;border:1px solid var(--rule-strong);border-radius:var(--radius-md);background:#fff;color:var(--ink);font-family:var(--font-reading);font-size:1.6rem;cursor:pointer;transition:border-color var(--fast) var(--ease),background var(--fast) var(--ease)}.gender-btn:hover:not(:disabled){border-color:var(--accent)}.gender-btn.right{border-color:var(--correct-line);background:var(--correct-soft);color:var(--correct)}.gender-btn.wrong{border-color:var(--wrong-line);background:var(--wrong-soft);color:var(--wrong)}.own-input{width:100%;max-width:34rem;padding:.85rem 1rem;border:1px solid var(--rule-strong);border-radius:var(--radius-md);background:transparent;color:var(--ink);font-family:var(--font-reading);font-size:1.05rem;line-height:1.6;resize:vertical}.own-input:focus-visible{outline:2px solid var(--focus);outline-offset:2px}.own-compare{display:grid;grid-gap:1rem;gap:1rem;max-width:34rem;margin:0 auto 1.25rem;text-align:left}@media (min-width:40rem){.own-compare{grid-template-columns:1fr 1fr}}.own-compare>div{padding:.9rem 1.1rem;border:1px solid var(--rule);border-radius:var(--radius-md)}.own-compare>div:last-child{border-color:var(--accent-line);background:var(--accent-soft)}.own-compare p{margin:0;font-family:var(--font-reading);line-height:1.55}.own-label{margin-bottom:.35rem!important;color:var(--muted);font-family:var(--font-ui)!important;font-size:.68rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase}.own-en{margin-top:.35rem!important;color:var(--muted);font-size:.9rem}.topic-readings{margin-top:var(--space-6);padding-top:var(--space-4);border-top:1px solid var(--rule)}.topic-readings h2{margin:0 0 .75rem;font-family:var(--font-ui);font-size:.72rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--muted)}.topic-readings ul{display:flex;flex-wrap:wrap;gap:.5rem;margin:0;padding:0;list-style:none}.topic-readings a{display:inline-block;padding:.45rem .9rem;border:1px solid var(--rule-strong);border-radius:999px;color:var(--ink);font-size:.9rem;text-decoration:none}.topic-readings a:hover{border-color:var(--accent);color:var(--accent)}.fam-list{display:grid;grid-gap:var(--space-5);gap:var(--space-5)}.fam{padding:1.4rem 1.5rem;border:1px solid var(--rule);border-radius:var(--radius-md);background:#fff}.fam header{display:flex;flex-wrap:wrap;align-items:baseline;gap:.7rem;padding-bottom:.9rem;margin-bottom:1rem;border-bottom:1px solid var(--rule)}.fam h2{margin:0;font-family:var(--font-reading);font-size:1.5rem;font-weight:600;letter-spacing:-.02em}.fam-gloss{color:var(--muted);font-size:.92rem}.fam-syn{display:grid;grid-gap:.85rem;gap:.85rem;margin:0;padding:0;list-style:none}.fam-word{display:flex;flex-wrap:wrap;align-items:baseline;gap:.5rem;margin:0;font-family:var(--font-reading);font-size:1.08rem;font-weight:600}.fam-note{margin:.1rem 0 0;color:var(--ink-soft);font-size:.9rem;line-height:1.5}.fam-example{margin:.25rem 0 0;color:var(--muted);font-family:var(--font-reading);font-size:.92rem;font-style:italic}.reg{padding:.08rem .45rem;border-radius:999px;font-family:var(--font-ui);font-size:.64rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase}.reg-coloquial{background:#fdf0e4;color:#92602a}.reg-neutro{background:var(--surface-cool);color:var(--muted)}.reg-formal{background:var(--accent-soft);color:var(--accent-hover)}.fam-ant{margin-top:1.1rem;padding-top:.9rem;border-top:1px dashed var(--rule-strong)}.fam-ant-label{margin:0 0 .4rem;color:var(--muted);font-family:var(--font-ui);font-size:.66rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase}.fam-ant ul{display:grid;grid-gap:.3rem;gap:.3rem;margin:0;padding:0;list-style:none}.fam-ant span[lang]{font-family:var(--font-reading);font-weight:600}.fits{padding-top:var(--space-2)}.fits-sentence{max-width:34rem;margin:0 auto var(--space-4);font-family:var(--font-reading);font-size:clamp(1.15rem,3.4vw,1.4rem);line-height:1.7;text-align:center}.fits-gap{display:inline-block;min-width:6rem;padding:0 .4rem;border-bottom:2px solid var(--rule-strong);color:var(--muted-light)}.fits-gap.filled{border-bottom-color:var(--accent);color:var(--accent)}.fits-why{max-width:34rem;margin:0 auto 1.1rem;color:var(--ink-soft);font-size:.92rem;line-height:1.6;text-align:left}.ladder{padding-top:var(--space-2);text-align:center}.ladder-slots{display:flex;flex-wrap:wrap;gap:.5rem;justify-content:center;align-items:center;min-height:3.5rem;margin:0 0 1.25rem;padding:.75rem;border:1px dashed var(--rule-strong);border-radius:var(--radius-md);list-style:none;counter-reset:step}.ladder-empty{color:var(--muted-light)}.ladder-pool{display:flex;flex-wrap:wrap;gap:.5rem;justify-content:center;margin-bottom:1.25rem}.ladder-chip{padding:.45rem .9rem;border:1px solid var(--rule-strong);border-radius:999px;background:#fff;color:var(--ink);font-family:var(--font-reading);font-size:1rem;cursor:pointer;transition:border-color var(--fast) var(--ease),color var(--fast) var(--ease)}.ladder-chip:hover{border-color:var(--accent);color:var(--accent)}.ladder-chip.placed{border-color:var(--accent);background:var(--accent-soft)}.ladder-chip.right{border-color:var(--correct-line);background:var(--correct-soft);color:var(--correct)}.ladder-chip.wrong{border-color:var(--wrong-line);background:var(--wrong-soft);color:var(--wrong)}.ladder-answer{max-width:30rem;margin:0 auto 1.1rem;padding-left:1.2rem;text-align:left}.ladder-answer li{margin-bottom:.35rem}.ladder-answer span[lang]{font-family:var(--font-reading);font-weight:600}.lift-plain{font-size:clamp(1.15rem,3.4vw,1.45rem);font-style:italic;color:var(--ink-soft)}.fits-context{max-width:34rem;margin:0 auto 1.1rem;padding:.75rem 1rem;border-left:3px solid var(--accent-line);background:var(--surface-cool);border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-size:.92rem}.fits-context,.pair-notes{color:var(--ink-soft);line-height:1.6;text-align:left}.pair-notes{max-width:32rem;margin:0 auto 1.25rem;padding:0;list-style:none;font-size:.9rem}.pair-notes li{margin-bottom:.35rem}.pair-notes span[lang]{font-family:var(--font-reading);font-weight:600}@media (max-width:640px){.word-bank{top:56px;padding:.7rem .85rem .8rem;max-height:30vh}.word-bank-label{margin-bottom:.55rem;font-size:.72rem}.bank-chip{padding:.35rem .65rem;font-size:.94rem}}.exercise-base+.word-bank{top:8.5rem}.nudge{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.9rem;margin:-.5rem 0 1.5rem;padding:.85rem 1.1rem;border:1px solid var(--accent-line);border-radius:var(--radius-md);background:var(--accent-soft)}.nudge p{flex:1 1 18rem;margin:0;color:var(--ink-soft);font-size:.88rem;line-height:1.55}.nudge strong{color:var(--ink);font-weight:600}.nudge-actions{display:flex;align-items:center;gap:.75rem}.nudge .btn{min-height:38px;padding:0 1rem;font-size:.86rem}.nudge-dismiss{border:0;background:none;color:var(--muted);font-family:var(--font-ui);font-size:.84rem;cursor:pointer}.nudge-dismiss:hover{color:var(--ink)}.account-how{max-width:34rem;color:var(--muted);font-size:.9rem}.practice-block{margin:var(--space-4) 0 var(--space-6);padding-bottom:var(--space-5);border-bottom:1px solid var(--rule)}.practice-block>h2{margin:0 0 .25rem;font-family:var(--font-ui);font-size:.72rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--muted)}.practice-note{margin:-.5rem 0 1.25rem;padding:.7rem .95rem;border-left:3px solid var(--accent-line);background:var(--surface-cool);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--ink-soft);font-size:.88rem;line-height:1.55}.produce-input.close{border-color:var(--accent-line)}.produce-verdict.v-close{color:var(--accent-hover)}@media (max-width:560px){.match-cols{column-gap:1.5rem}}