:root{--ink:#123b70;--muted:#597494;--blue:#2f73f2;--violet:#7458eb;--cyan:#36c4df;--mint:#36c59e;--gold:#ffc44c;--danger:#ef6471;--surface:#fff;--line:#dbeafb;--bg:#eaf6ff;--shadow:0 14px 34px rgba(25,70,130,.16)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:"Segoe UI",Tahoma,Arial,sans-serif;color:var(--ink);background:radial-gradient(circle at 12% 20%,#d7fff4 0 10%,transparent 25%),radial-gradient(circle at 92% 10%,#e7ddff 0 12%,transparent 28%),linear-gradient(145deg,#eefaff,#dcecff 55%,#edf0ff);min-height:100vh}button,input{font:inherit}.shell{width:min(1180px,calc(100% - 28px));margin:auto}.topbar{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.88);backdrop-filter:blur(14px);border-bottom:1px solid rgba(163,202,238,.6)}.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:12px 0}.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-weight:900}.brand-mark{width:46px;height:46px;border-radius:15px;background:linear-gradient(145deg,var(--cyan),var(--violet));display:grid;place-items:center;color:white;font-size:24px;box-shadow:0 7px 0 #285fc0}.nav{display:flex;gap:7px;flex-wrap:wrap}.nav a{color:var(--ink);text-decoration:none;font-weight:800;padding:10px 13px;border-radius:14px}.nav a:hover,.nav a.active{background:#e2f2ff;color:#125dc0}.icon-btn{border:0;background:#eff7ff;color:var(--ink);width:44px;height:44px;border-radius:14px;cursor:pointer;font-size:20px}.hero{margin:28px 0 22px;padding:clamp(25px,5vw,55px);border-radius:32px;color:#fff;background:linear-gradient(125deg,#0e9ec8,#3977ee 58%,#7659ec);box-shadow:0 12px 0 #2564b5,var(--shadow);position:relative;overflow:hidden}.hero:after{content:"Aa";position:absolute;left:5%;bottom:-25px;font-size:150px;font-weight:900;opacity:.1}.eyebrow{font-weight:900;color:#dffcff}.hero h1{font-size:clamp(34px,6vw,66px);line-height:1;margin:10px 0}.hero p{font-size:clamp(17px,2vw,22px);max-width:720px;line-height:1.7}.actions{display:flex;gap:12px;flex-wrap:wrap}.btn{border:0;border-radius:16px;padding:13px 19px;font-weight:900;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer}.btn-primary{background:#fff;color:#1b5fd0;box-shadow:0 6px 0 #bfd7ff}.btn-secondary{background:#143f77;color:#fff;box-shadow:0 6px 0 #0b2b54}.btn-gold{background:var(--gold);color:#5a3d00;box-shadow:0 6px 0 #d99418}.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:18px}.card{background:rgba(255,255,255,.93);border:1px solid #d6eafb;border-radius:24px;padding:22px;box-shadow:var(--shadow)}.card h2,.card h3{margin-top:0}.span-8{grid-column:span 8}.span-4{grid-column:span 4}.span-6{grid-column:span 6}.section-title{font-size:clamp(25px,3vw,38px);margin:38px 0 16px}.level-grid,.topic-grid,.word-grid,.mastery-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:14px}.level-card,.topic-card,.word-card{background:#fff;border:2px solid var(--line);border-radius:20px;padding:18px;text-decoration:none;color:var(--ink);transition:.2s;box-shadow:0 7px 0 #dbeafb}.level-card:hover,.topic-card:hover,.word-card:hover{transform:translateY(-3px);border-color:#74b9ff}.level-pill{display:inline-grid;place-items:center;min-width:54px;height:38px;border-radius:13px;background:linear-gradient(135deg,#35caa2,#38a8e8);color:white;font-weight:900}.topic-icon{font-size:38px}.word-card .word{font-size:25px;font-weight:900;direction:ltr;text-align:left}.word-card .meaning{color:var(--muted);font-weight:700}.progress{height:12px;border-radius:999px;background:#dce9f4;overflow:hidden}.progress>span{display:block;height:100%;background:linear-gradient(90deg,var(--mint),var(--cyan),var(--gold));border-radius:inherit}.stat-row{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}.stat{flex:1;min-width:120px;padding:13px;border-radius:16px;background:#edf7ff;text-align:center}.stat b{display:block;font-size:25px}.word-hero{display:grid;grid-template-columns:1fr auto;gap:20px;align-items:center}.word-title{font-size:clamp(45px,8vw,82px);line-height:1;direction:ltr;text-align:left;margin:0}.ipa{font-size:21px;color:var(--muted);direction:ltr;text-align:left}.audio-buttons{display:flex;gap:9px}.audio-btn{border:0;border-radius:18px;background:#ddf6ff;color:#075491;padding:13px 16px;font-weight:900;cursor:pointer}.sense{border-right:6px solid var(--mint)}.english{direction:ltr;text-align:left}.example{padding:15px;border-radius:16px;background:#f2f8ff;margin:10px 0}.chips{display:flex;flex-wrap:wrap;gap:9px}.chip{padding:8px 12px;border-radius:999px;background:#e6f3ff;font-weight:800}.error{background:#fff0f1;border-color:#ffc8cc}.mastery-item{padding:12px;border-radius:14px;background:#eef7ff}.mastery-item strong{display:flex;justify-content:space-between}.filters{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0}.filter{border:1px solid #b9d9f7;border-radius:999px;padding:9px 14px;background:white;cursor:pointer;color:var(--ink);font-weight:800}.filter.active{background:var(--ink);color:white}.review-shell{max-width:850px;margin:30px auto}.question{font-size:clamp(25px,4vw,38px);font-weight:900;text-align:center;margin:30px 0}.choices{display:grid;gap:12px}.choice{border:2px solid #cce2f7;background:white;color:var(--ink);padding:16px;border-radius:18px;font-weight:900;cursor:pointer;box-shadow:0 5px 0 #d1e2f2}.choice:hover{border-color:#5da7ef}.choice.correct{background:#dffbed;border-color:#35c78c}.choice.wrong{background:#ffe4e6;border-color:#f06c77}.answer-input{width:100%;border:2px solid #bcd8f3;border-radius:18px;padding:17px;direction:ltr;text-align:left;font-size:20px}.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,120px);opacity:0;transition:.25s;z-index:50;background:#123b70;color:#fff;padding:14px 20px;border-radius:16px;font-weight:900;box-shadow:var(--shadow)}.toast.show{transform:translate(-50%,0);opacity:1}.footer{padding:45px 0;color:var(--muted);text-align:center}@media(max-width:760px){.topbar-inner{align-items:flex-start}.nav{justify-content:flex-end}.nav a{padding:8px;font-size:13px}.span-8,.span-4,.span-6{grid-column:1/-1}.hero{border-radius:24px}.word-hero{grid-template-columns:1fr}.audio-buttons{justify-content:flex-start}.card{padding:17px}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* Vocabulary application layout compatibility */
.vocab-header{position:sticky;top:10px;z-index:30;width:min(1180px,calc(100% - 28px));margin:14px auto;padding:11px 16px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:18px;background:rgba(255,255,255,.93);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);backdrop-filter:blur(16px)}
.vocab-header .brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-weight:950;white-space:nowrap}.vocab-header .brand span{width:44px;height:44px;display:grid;place-items:center;border-radius:14px;background:linear-gradient(145deg,var(--cyan),var(--violet));font-size:23px;box-shadow:0 5px 0 #b9d7fa}.vocab-header nav{display:flex;justify-content:center;gap:6px;flex-wrap:wrap}.vocab-header nav a{color:var(--ink);text-decoration:none;font-weight:850;padding:9px 12px;border-radius:13px}.vocab-header nav a:hover,.vocab-header nav a:focus-visible{background:#e2f2ff;color:#125dc0}.sound-toggle{border:0;background:#eff7ff;color:var(--ink);width:44px;height:44px;border-radius:14px;cursor:pointer;font-size:20px;box-shadow:0 4px 0 #c8def2}
#app>main{width:min(1180px,calc(100% - 28px));margin:0 auto 40px}#app>footer{width:min(1180px,calc(100% - 28px));margin:auto;padding:34px 0;color:var(--muted);text-align:center}
.primary,.secondary{border:0;border-radius:16px;padding:13px 19px;font-weight:900;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;font-family:inherit}.primary{background:#fff;color:#1b5fd0;box-shadow:0 6px 0 #bfd7ff}.secondary{background:#143f77;color:#fff;box-shadow:0 6px 0 #0b2b54}.primary:active,.secondary:active{transform:translateY(3px);box-shadow:none}.hero>div:first-child{position:relative;z-index:2;max-width:78%}.hero-orbit{position:absolute;z-index:1;left:4%;top:50%;transform:translateY(-50%);display:grid;gap:4px;justify-items:center;font-size:clamp(38px,6vw,78px);line-height:.9;opacity:.2;filter:drop-shadow(0 16px 18px rgba(20,63,119,.18));pointer-events:none}.hero-orbit span,.hero-orbit em{font-size:.3em;font-style:normal}
.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:22px 0}.stat-grid article{background:rgba(255,255,255,.94);border:1px solid #d6eafb;border-radius:20px;padding:18px;text-align:center;box-shadow:var(--shadow)}.stat-grid strong{display:block;font-size:30px;color:var(--ink)}.stat-grid span{color:var(--muted);font-weight:750}
.section-title{display:flex;align-items:end;justify-content:space-between;gap:14px;margin:30px 0 14px}.section-title h2{margin:0;font-size:clamp(24px,3vw,34px)}.section-title p{margin:0;color:var(--muted)}
.topic-grid,.word-grid,.filter-grid,.skill-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.topic-card,.word-card,.filter-card{display:block;background:rgba(255,255,255,.94);border:1px solid #d7eafa;border-radius:20px;padding:18px;color:var(--ink);text-decoration:none;box-shadow:var(--shadow);transition:.2s transform,.2s box-shadow}.topic-card:hover,.word-card:hover,.filter-card:hover{transform:translateY(-3px);box-shadow:0 18px 38px rgba(29,72,129,.18)}.topic-card strong,.word-card strong,.filter-card strong{display:block;font-size:20px;margin-bottom:6px}.topic-card span,.word-card span,.filter-card span{color:var(--muted)}.level{display:inline-flex!important;width:auto!important;color:#fff!important;background:linear-gradient(135deg,var(--cyan),var(--violet));padding:4px 9px;border-radius:999px;font-size:12px;margin-bottom:10px}.mini-progress{height:8px;background:#dceaf5;border-radius:99px;overflow:hidden;margin-top:13px}.mini-progress i{display:block;height:100%;background:linear-gradient(90deg,#30cba3,#f5d94e);border-radius:inherit}
.page-intro{padding:28px;border-radius:28px;background:linear-gradient(135deg,#e9f9ff,#f1ebff);border:1px solid #d5e7fb;margin:20px 0}.page-intro h1{margin:0 0 8px;font-size:clamp(34px,5vw,58px)}.page-intro p{margin:0;color:var(--muted);font-size:18px}.tabs{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0}.tabs button,.tabs a{border:0;background:#eaf4ff;color:var(--ink);border-radius:14px;padding:10px 14px;font-weight:850;text-decoration:none;cursor:pointer}.tabs .active{background:var(--ink);color:white}
.back{display:inline-flex;margin:12px 0;color:#135fbf;text-decoration:none;font-weight:900}.word-detail{background:rgba(255,255,255,.96);border:1px solid #d5e8f8;border-radius:28px;padding:clamp(20px,4vw,42px);box-shadow:var(--shadow)}.word-top{display:grid;grid-template-columns:1fr auto;gap:20px;align-items:start}.word-top h1{font-size:clamp(48px,8vw,86px);margin:0}.ipa{font:700 22px system-ui;color:#22659f;direction:ltr;text-align:left}.listen-buttons{display:flex;gap:8px;flex-wrap:wrap}.listen-buttons button{border:0;border-radius:14px;padding:10px 14px;background:#dff3ff;color:#134e83;font-weight:900;cursor:pointer}.meaning{background:#fff0b9;border-radius:18px;padding:16px 18px;margin:18px 0;font-size:22px;font-weight:900;color:#654a00}.detail-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:15px}.detail-grid>section{background:#f5faff;border:1px solid #deebf6;border-radius:20px;padding:18px}.detail-grid h2{margin-top:0}.example{direction:ltr;text-align:left;background:white;border-radius:14px;padding:13px;margin:9px 0}.chips{display:flex;gap:8px;flex-wrap:wrap}.chips span{background:#dff4ee;padding:8px 11px;border-radius:999px;font-weight:800}.errors{background:#fff1f3!important;border-color:#ffd4dc!important}.skill-grid{grid-template-columns:repeat(3,1fr);margin-top:18px}.skill-grid article{background:white;border:1px solid #dbeaf6;border-radius:18px;padding:15px}.skill-grid progress{width:100%;accent-color:#25b798}
.review-shell{max-width:860px;margin:20px auto;background:rgba(255,255,255,.96);border:1px solid #d9eaf8;border-radius:28px;padding:clamp(20px,4vw,40px);box-shadow:var(--shadow)}.review-head{display:flex;align-items:center;justify-content:space-between;gap:15px}.review-head progress{flex:1;accent-color:#29bd96}.prompt{background:linear-gradient(135deg,#e7f8ff,#f4efff);padding:24px;border-radius:22px;margin:20px 0;text-align:center;font-size:clamp(24px,4vw,38px);font-weight:950}.options{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.options button{border:2px solid #cee2f3;background:white;border-radius:17px;padding:16px;font:850 18px inherit;cursor:pointer;color:var(--ink)}.options button:hover{border-color:#42a9ed;background:#eef9ff}.answer-box{display:flex;gap:10px}.answer-box input{flex:1;min-width:0;border:2px solid #c9e0f2;border-radius:16px;padding:14px 16px;font:800 18px inherit;direction:ltr}.feedback{margin-top:16px;padding:15px;border-radius:16px;font-weight:850}.feedback.ok{background:#dff9e9;color:#14643b}.feedback.bad{background:#ffe5e8;color:#962d40}.filter-card.active{outline:3px solid #42a9ed;background:#eef9ff}
@media(max-width:800px){.vocab-header{grid-template-columns:1fr auto;top:6px}.vocab-header nav{grid-column:1/-1;order:3;flex-wrap:nowrap;overflow-x:auto;justify-content:flex-start;padding-bottom:2px}.hero-orbit{display:none}.stat-grid,.topic-grid,.word-grid,.filter-grid,.skill-grid,.detail-grid{grid-template-columns:1fr 1fr}.word-top{grid-template-columns:1fr}.options{grid-template-columns:1fr}}
@media(max-width:520px){#app>main,.vocab-header,#app>footer{width:min(100% - 18px,1180px)}.vocab-header{padding:9px 11px}.vocab-header .brand b{font-size:14px}.hero{padding:25px 20px}.stat-grid,.topic-grid,.word-grid,.filter-grid,.skill-grid,.detail-grid{grid-template-columns:1fr}.section-title{align-items:start;flex-direction:column}.answer-box{flex-direction:column}.word-detail,.review-shell{border-radius:22px}.word-top h1{font-size:48px}}

/* Adaptive vocabulary practice */
.practice-head{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;margin:28px 0 16px}.practice-head h1{margin:5px 0;font-size:clamp(30px,5vw,52px)}.practice-kicker{color:#146cc2;font-weight:950}.practice-score{min-width:125px;text-align:center;background:linear-gradient(135deg,#fff4b9,#ffd35f);border:2px solid #fff;border-radius:22px;padding:12px;box-shadow:0 7px 0 #e5a91d;font-weight:950;font-size:20px}.practice-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;font-weight:850;color:var(--muted)}.practice-progress{height:13px;border-radius:999px;background:#d5e7f4;overflow:hidden;margin:12px 0 22px}.practice-progress>span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,#31c598,#36bee4,#665cf0);transition:width .25s ease}.practice-card{background:rgba(255,255,255,.97);border:2px solid #d5e9fa;border-radius:28px;padding:clamp(20px,4vw,38px);box-shadow:0 10px 0 #b9d8f1,var(--shadow);min-height:420px}.practice-card h2{text-align:center;font-size:clamp(25px,4vw,40px);margin:4px 0 10px}.practice-card .instruction{text-align:center;color:var(--muted);font-weight:800;margin-bottom:22px}.practice-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;max-width:850px;margin:22px auto}.practice-option,.match-tile{border:2px solid #cde2f5;background:#fff;color:var(--ink);border-radius:18px;padding:16px;min-height:68px;font-weight:900;cursor:pointer;box-shadow:0 5px 0 #bdd6e9;transition:transform .15s,border-color .15s}.practice-option:hover,.match-tile:hover{transform:translateY(-2px);border-color:#42a9ed}.practice-option.correct,.match-tile.matched{background:#d9f8e9;border-color:#2bc18f;color:#126847}.practice-option.wrong,.match-tile.wrong{background:#ffe1e5;border-color:#ee6a78;color:#9e2940}.option-visual,.question-visual{font-size:clamp(42px,7vw,82px);display:block;margin-bottom:8px}.question-visual{text-align:center;margin:16px auto}.audio-actions,.finish-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin:18px 0}.audio-actions button,.finish-actions a,.finish-actions button,.typed-form button{border:0;border-radius:16px;padding:13px 20px;background:linear-gradient(135deg,var(--blue),var(--violet));color:#fff;font-weight:900;cursor:pointer;box-shadow:0 5px 0 #225ab7;text-decoration:none}.context-line,.arabic-support{max-width:850px;margin:15px auto;padding:18px;border-radius:18px;text-align:center;font-size:clamp(20px,3vw,30px);font-weight:900}.context-line{background:#e8f7ff;direction:ltr}.arabic-support{background:#fff0b9;color:#6b4b00}.typed-form{max-width:720px;margin:25px auto;display:flex;gap:12px}.typed-form input{flex:1;min-width:0;border:3px solid #c9e0f2;border-radius:17px;padding:15px 17px;font-size:21px;font-weight:800;direction:ltr}.practice-feedback{margin:20px auto 0;max-width:850px;padding:15px 18px;border-radius:17px;font-weight:900;text-align:center}.practice-feedback.ok{background:#dff8e9;color:#126847}.practice-feedback.bad{background:#ffe5e8;color:#952d40}.matching-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;max-width:820px;margin:25px auto}.match-tile.selected{outline:4px solid #ffd35f;border-color:#efb51e}.practice-finish,.empty-state{text-align:center;padding:35px 18px}.practice-finish h2{font-size:clamp(32px,5vw,54px)}
@media(max-width:680px){.practice-head{align-items:stretch;flex-direction:column}.practice-score{align-self:flex-start}.practice-options{grid-template-columns:1fr}.practice-card{min-height:360px;padding:20px 14px}.matching-grid{grid-template-columns:1fr}.typed-form{flex-direction:column}.practice-meta{font-size:13px}}