/* ============================================================
   Klar shared stylesheet.
   One source of truth for the look. Every page links this file,
   so a colour or spacing change here updates the whole site.
   ============================================================ */

:root{
  --bg:#121319; --surface:#1C1E27; --surface-2:#242732;
  --text:#ECE9E1; --muted:#9B9DA8; --gold:#E9B84C;
  --gold-soft:rgba(233,184,76,0.14); --line:rgba(255,255,255,0.10);
  --correct:#5BBF7B; --wrong:#E0685E; --radius:18px;
}

*{box-sizing:border-box;margin:0;padding:0;}
body{
  font-family:"Inter",system-ui,-apple-system,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

/* ---- skip link (accessibility) ---- */
.skip-link{position:absolute;top:-40px;left:0;background:var(--gold);color:#1a1500;padding:8px 16px;z-index:100;font-weight:600;border-radius:0 0 8px 0;transition:top .15s ease;}
.skip-link:focus{top:0;}

/* ---- loading spinner ---- */
.loading{text-align:center;padding:40px 20px;color:var(--muted);}
.loading::before{content:"";display:block;width:28px;height:28px;border:3px solid var(--line);border-top-color:var(--gold);border-radius:50%;margin:0 auto 12px;animation:spin .7s linear infinite;}
@keyframes spin{to{transform:rotate(360deg);}}

/* ---- error state ---- */
.error-state{text-align:center;padding:40px 20px;color:var(--muted);}
.error-state p{margin-bottom:14px;}
.error-state .btn{font-size:14px;padding:8px 18px;}
.wrap{width:100%;max-width:680px;margin:0 auto;padding:0 20px;}
.wrap.wide{max-width:1040px;}

/* ---- top navigation chrome ---- */
.topbar{display:flex;align-items:center;justify-content:space-between;padding:16px 0;border-bottom:1px solid var(--line);gap:10px;flex-wrap:wrap;}
.logo{font-family:"Fraunces",serif;font-weight:600;font-size:22px;color:var(--text);text-decoration:none;flex-shrink:0;}
.logo .dot{color:var(--gold);}
.back{color:var(--muted);text-decoration:none;font-size:14px;font-weight:500;cursor:pointer;background:none;border:none;font-family:inherit;flex-shrink:0;}
.back:hover{color:var(--gold);}
.topbar .nav-user{margin-left:auto;}

/* ---- headings ---- */
.eyebrow{font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--gold);font-weight:600;}
h1{font-family:"Fraunces",serif;font-weight:600;font-size:clamp(26px,5vw,32px);}
h2{font-family:"Fraunces",serif;font-weight:600;}
.hint{color:var(--muted);font-size:14px;}
.intro{padding:26px 0 8px;}
.intro h1{margin:4px 0 6px;}

/* ---- buttons ---- */
.btn{font:inherit;font-weight:600;border-radius:999px;padding:11px 20px;cursor:pointer;border:1px solid transparent;text-decoration:none;display:inline-block;transition:transform .08s ease,opacity .18s ease,background .18s ease;}
.btn:active{transform:translateY(1px);}
.btn-gold{background:var(--gold);color:#1a1500;}
.btn-gold:hover{opacity:.88;}
.btn-line{background:transparent;color:var(--text);border-color:var(--line);}
.btn-line:hover{background:rgba(255,255,255,.05);}
.btn:disabled{opacity:.4;cursor:not-allowed;}
.btn:focus-visible{outline:2px solid var(--gold);outline-offset:3px;}

/* ---- level tabs (shared selector) ---- */
.tabs{display:flex;gap:8px;margin:20px 0 18px;}
.tab{flex:1;text-align:center;padding:10px 0;border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--muted);font-weight:600;cursor:pointer;font-size:14px;font-family:inherit;transition:all .15s ease;}
.tab:hover{border-color:rgba(233,184,76,.5);}
.tab.active{background:var(--gold);color:#1a1500;border-color:var(--gold);}

/* ---- library list ---- */
.lib{display:flex;flex-direction:column;gap:12px;margin-bottom:60px;}
.lib-card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:18px;cursor:pointer;transition:transform .1s ease,border-color .15s ease;}
.lib-card:hover{transform:translateY(-2px);border-color:rgba(233,184,76,.5);}
.lib-card h3{font-family:"Fraunces",serif;font-weight:600;font-size:18px;margin-bottom:4px;}
.lib-card p{color:var(--muted);font-size:14px;}
.lib-card .meta{display:flex;gap:10px;margin-top:10px;font-size:12px;color:var(--muted);align-items:center;}
.badge{background:var(--gold-soft);color:var(--gold);border-radius:999px;padding:2px 10px;font-weight:600;}

/* ---- view switching ---- */
.view{display:none;}
.view.show{display:block;}

/* ---- reader ---- */
.reader-head{padding:20px 0 4px;}
.reader-head h2{font-size:24px;margin-top:8px;}
.reader{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px 22px;margin:16px 0 120px;font-size:20px;line-height:1.95;}
.reader p{margin-bottom:14px;}
.w{cursor:pointer;border-bottom:1px dashed rgba(233,184,76,.45);padding:0 1px;border-radius:3px;transition:background .12s ease;}
.w:hover{background:var(--gold-soft);}
.w.active{background:var(--gold);color:#1a1500;border-bottom-color:transparent;}

/* ---- bottom sheet (word details) ---- */
.sheet{position:fixed;left:0;right:0;bottom:0;background:var(--surface-2);border-top:1px solid var(--line);border-radius:20px 20px 0 0;padding:22px 22px 28px;transform:translateY(110%);transition:transform .28s ease;box-shadow:0 -10px 40px rgba(0,0,0,.4);max-width:680px;margin:0 auto;}
.sheet.show{transform:translateY(0);}
.sheet .row1{display:flex;align-items:baseline;justify-content:space-between;gap:12px;}
.sheet .de{font-family:"Fraunces",serif;font-weight:600;font-size:26px;}
.sheet .close{background:none;border:none;color:var(--muted);font-size:22px;cursor:pointer;line-height:1;}
.sheet .en{color:var(--gold);font-size:17px;margin-top:2px;}
.sheet .grid{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.tag{background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:6px 13px;font-size:13px;}
.tag b{color:var(--text);} .tag span{color:var(--muted);}
.sheet .note{margin-top:14px;font-size:14px;color:var(--muted);}
.sheet .note b{color:var(--gold);font-weight:600;}

/* ---- small helpers ---- */
.notice{color:var(--muted);font-size:14px;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px 16px;}
.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;}

/* ---- matching game ---- */
.scorebar{display:flex;gap:12px;align-items:center;}
.pill{background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:7px 14px;font-size:14px;font-weight:600;}
.pill span{color:var(--muted);font-weight:500;}
.progress{flex:1;height:8px;background:var(--surface);border:1px solid var(--line);border-radius:999px;overflow:hidden;}
.progress-fill{height:100%;width:0%;background:var(--gold);transition:width .35s ease;}
.source{font-size:12px;color:var(--muted);margin-top:10px;}
.board{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:18px;}
.col-title{font-size:12px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;margin-bottom:8px;}
.column{display:flex;flex-direction:column;gap:10px;}
.match-card{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:16px 14px;font-size:17px;font-weight:500;cursor:pointer;text-align:center;transition:transform .08s ease,border-color .15s ease,background .15s ease;user-select:none;}
.match-card.german{font-family:"Fraunces",serif;font-weight:600;}
.match-card:hover{transform:translateY(-1px);border-color:rgba(233,184,76,.4);}
.match-card.selected{border-color:var(--gold);background:var(--surface-2);}
.match-card.correct{border-color:var(--correct);color:var(--correct);cursor:default;}
.match-card.wrong{border-color:var(--wrong);animation:shake .3s;}
.match-card.done{opacity:.4;pointer-events:none;}
@keyframes shake{0%,100%{transform:translateX(0);}25%{transform:translateX(-5px);}75%{transform:translateX(5px);}}
.done-panel{display:none;text-align:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px 20px;margin-top:20px;}
.done-panel.show{display:block;}
.done-panel h2{margin-bottom:6px;}
.done-panel p{color:var(--muted);margin-bottom:16px;}

/* ---- shadowing trainer ---- */
.trainer{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;margin-top:8px;}
.phrase{font-family:"Fraunces",serif;font-weight:600;font-size:26px;line-height:1.35;}
.phrase-en{color:var(--muted);margin-top:6px;}
.controls{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px;}
.btn.recording{background:var(--wrong);color:#fff;animation:pulse 1.1s infinite;}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.6;}}
.result{margin-top:22px;display:none;}
.result.show{display:block;}
.heard{color:var(--muted);font-size:14px;}
.heard b{color:var(--text);}
.scoreline{display:flex;align-items:center;gap:14px;margin-top:12px;}
.score{font-family:"Fraunces",serif;font-weight:600;font-size:34px;}
.meter{flex:1;height:10px;background:var(--surface-2);border-radius:999px;overflow:hidden;}
.meter-fill{height:100%;width:0%;transition:width .4s ease;}
.verdict{margin-top:8px;font-size:14px;}
.nav-row{display:flex;justify-content:space-between;align-items:center;margin-top:26px;}
.counter{color:var(--muted);font-size:14px;}
.unsupported{margin-top:14px;font-size:14px;color:#E0B05E;background:rgba(224,176,94,.1);border:1px solid rgba(224,176,94,.3);border-radius:12px;padding:12px 14px;display:none;}
.unsupported.show{display:block;}

/* ---- grammar module ---- */
.lesson{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px 22px;margin:16px 0 20px;}
.lesson h3{font-family:"Fraunces",serif;font-weight:600;font-size:20px;margin-bottom:10px;}
.lesson p{margin-bottom:10px;}
.examples{display:flex;flex-direction:column;gap:8px;margin-top:12px;}
.example{background:var(--surface-2);border:1px solid var(--line);border-radius:12px;padding:10px 14px;}
.example .ex-de{font-family:"Fraunces",serif;font-size:16px;}
.example .ex-en{color:var(--muted);font-size:13px;margin-top:2px;}
.example .ex-note{color:var(--gold);font-size:12px;margin-top:4px;}
.exercise{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px 20px;margin-bottom:80px;}
.ex-count{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;}
.ex-prompt{font-size:18px;margin:8px 0 16px;}
.opts{display:flex;flex-direction:column;gap:10px;}
.opt{text-align:left;background:var(--surface-2);border:1px solid var(--line);border-radius:12px;padding:13px 15px;cursor:pointer;font:inherit;color:var(--text);transition:border-color .15s ease,background .15s ease;}
.opt:hover{border-color:rgba(233,184,76,.5);}
.opt:disabled{cursor:default;}
.opt.correct{border-color:var(--correct);background:rgba(91,191,123,.12);color:var(--correct);}
.opt.wrong{border-color:var(--wrong);background:rgba(224,104,94,.12);color:var(--wrong);}
.fill-row{display:flex;gap:10px;flex-wrap:wrap;}
.fill-input{flex:1;min-width:0;background:var(--surface-2);border:1px solid var(--line);border-radius:12px;padding:12px 14px;color:var(--text);font:inherit;}
.fill-input:focus{outline:2px solid var(--gold);outline-offset:1px;}
.feedback{margin-top:14px;font-size:14px;display:none;}
.feedback.show{display:block;}
.feedback .fb-verdict{font-weight:600;}
.feedback .fb-note{color:var(--muted);margin-top:4px;}
.ex-foot{display:flex;justify-content:flex-end;margin-top:16px;}
.lesson-done{text-align:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:30px 20px;margin-bottom:80px;}
.lesson-done h2{margin-bottom:6px;}
.lesson-done p{color:var(--muted);margin-bottom:16px;}

/* ---- exam suite ---- */
.skills{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:60px;}
.skill-tile{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px 20px;display:flex;flex-direction:column;}
.skill-tile .k{font-family:"Fraunces",serif;font-weight:600;font-size:30px;color:var(--gold);}
.skill-tile h3{font-family:"Fraunces",serif;font-weight:600;font-size:18px;margin:8px 0 4px;}
.skill-tile p{color:var(--muted);font-size:13px;margin-bottom:14px;flex:1;}
.skill-tile .soon{color:var(--muted);font-size:13px;}
.exam-bar{position:sticky;top:0;background:var(--bg);display:flex;justify-content:space-between;align-items:center;padding:12px 0;border-bottom:1px solid var(--line);z-index:5;}
.exam-bar .title{font-weight:600;}
.timer{font-family:"Fraunces",serif;font-weight:600;font-size:22px;}
.timer.low{color:var(--wrong);}
.passage{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin:16px 0;font-size:17px;line-height:1.85;}
.passage p{margin-bottom:12px;}
.question{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:18px;margin-bottom:14px;}
.question .q-num{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;}
.question .q-prompt{font-size:16px;margin:6px 0 12px;}
.opt.sel{border-color:var(--gold);background:var(--surface-2);}
.submit-row{margin:10px 0 80px;}
.result-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px 22px;margin-bottom:20px;text-align:center;}
.result-card h2{font-size:36px;font-family:"Fraunces",serif;font-weight:600;}
.result-card .band{margin-top:6px;font-weight:600;}
.result-card p{color:var(--muted);margin-top:8px;}

/* ---- listening (Hörverstehen) ---- */
.audio-area{}
.listen-box{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin:16px 0;display:flex;align-items:center;gap:16px;flex-wrap:wrap;}
.listen-label{color:var(--muted);font-size:14px;flex:1;min-width:180px;}
.play-count{font-size:13px;color:var(--muted);}

/* ---- writing (Schreiben) ---- */
.write-prompt{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin:16px 0;}
.write-task{font-size:17px;line-height:1.7;}
.write-bullets{margin:0 0 16px;}
.write-bullets ul{list-style:disc;padding-left:22px;color:var(--muted);font-size:15px;line-height:1.8;}
.write-area{width:100%;min-height:220px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px;color:var(--text);font:inherit;font-size:16px;line-height:1.75;resize:vertical;}
.write-area:focus{outline:2px solid var(--gold);outline-offset:1px;}
.write-meta{display:flex;justify-content:space-between;align-items:center;margin-top:8px;font-size:13px;}
.word-count{font-weight:600;}
.word-target{color:var(--muted);}

/* ---- speaking (Sprechen) ---- */
.speak-prompt{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin:16px 0;}
.speak-bullets{margin:0 0 16px;}
.speak-bullets ul{list-style:disc;padding-left:22px;color:var(--muted);font-size:15px;line-height:1.8;}
.speak-status{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px;font-size:15px;text-align:center;}
.speak-status.prep{color:var(--gold);border-color:rgba(233,184,76,.3);}
.speak-status.active{color:var(--correct);border-color:rgba(91,191,123,.3);}

/* ---- self-assessment rubric ---- */
.rubric-head{padding:20px 0 4px;}
.rubric-head h2{font-family:"Fraunces",serif;font-weight:600;font-size:22px;}
.rubric-response{margin:16px 0;}
.rubric-text{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px;font-size:15px;line-height:1.8;white-space:pre-wrap;max-height:200px;overflow-y:auto;}
.rubric-grid{display:flex;flex-direction:column;gap:16px;margin-bottom:20px;}
.rubric-row{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px;}
.rubric-criterion h3{font-family:"Fraunces",serif;font-weight:600;font-size:16px;margin-bottom:2px;}
.rubric-criterion p{color:var(--muted);font-size:13px;margin-bottom:12px;}
.rubric-levels{display:flex;flex-direction:column;gap:8px;}
.rubric-level{text-align:left;background:var(--surface-2);border:1px solid var(--line);border-radius:10px;padding:10px 14px;cursor:pointer;font:inherit;font-size:14px;color:var(--text);transition:border-color .15s ease,background .15s ease;}
.rubric-level:hover{border-color:rgba(233,184,76,.5);}
.rubric-level.sel{border-color:var(--gold);background:rgba(233,184,76,.1);}
.rubric-level .rl-score{font-family:"Fraunces",serif;font-weight:600;color:var(--gold);margin-right:6px;}
.rubric-total{margin-bottom:10px;}

/* ---- landing page ---- */
body.landing{background-image:radial-gradient(60vw 50vh at 15% 0%,rgba(233,184,76,0.08),transparent 60%);background-repeat:no-repeat;}
.landing .wrap.wide{max-width:1040px;}
.nav{display:flex;align-items:center;justify-content:space-between;padding:20px 0;gap:12px;}
.nav .logo{font-size:26px;flex-shrink:0;}
.nav-actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap;justify-content:flex-end;}
.btn-solid{background:var(--gold);color:#1a1500;}
.btn-solid:hover{opacity:.88;}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line);}
.btn-ghost:hover{background:rgba(255,255,255,.05);}

.hero{display:grid;grid-template-columns:1.05fr 0.95fr;gap:50px;align-items:center;padding:60px 0 64px;}
.hero h1{font-family:"Fraunces",serif;font-weight:600;font-size:clamp(38px,6.5vw,60px);line-height:1.05;letter-spacing:-0.015em;margin-bottom:22px;}
.hero h1 em{font-style:italic;font-weight:400;color:var(--gold);}
.hero p.lead{font-size:clamp(16px,2.3vw,19px);color:var(--muted);max-width:34ch;margin-bottom:30px;}
.hero .eyebrow{margin-bottom:20px;}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;}

.ladder{display:flex;align-items:flex-end;gap:14px;height:280px;width:100%;max-width:100%;}
.step{flex:1;min-width:0;background:var(--surface);border:1px solid var(--line);border-radius:16px;display:flex;flex-direction:column;justify-content:flex-end;padding:14px 12px;overflow:hidden;}
.step .lvl{font-family:"Fraunces",serif;font-weight:600;font-size:clamp(18px,4vw,24px);}
.step .tag{font-size:clamp(9px,2vw,11px);color:var(--muted);letter-spacing:.04em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.step.s1{height:46%;}.step.s2{height:64%;}.step.s3{height:82%;}
.step.s4{height:100%;background:var(--gold);color:#1a1500;border-color:var(--gold);box-shadow:0 0 40px rgba(233,184,76,0.35);}
.step.s4 .tag{color:rgba(26,21,0,0.7);}

.section{padding:60px 0;border-top:1px solid var(--line);}
.section-head{margin-bottom:30px;}
.section-head .num{font-family:"Fraunces",serif;color:var(--gold);font-size:15px;letter-spacing:.06em;}
.section-head h2{font-family:"Fraunces",serif;font-weight:600;font-size:clamp(26px,4vw,38px);line-height:1.1;margin-top:4px;}
.section-head .sub{color:var(--muted);margin-top:8px;max-width:48ch;}

.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px;}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px 22px;display:flex;flex-direction:column;gap:12px;transition:transform .12s ease,border-color .18s ease,background .18s ease;text-decoration:none;color:var(--text);}
.card:hover{transform:translateY(-4px);border-color:rgba(233,184,76,0.5);background:var(--surface-2);}
.chip{width:44px;height:44px;border-radius:12px;background:var(--gold-soft);color:var(--gold);display:grid;place-items:center;font-size:20px;}
.card h3{font-family:"Fraunces",serif;font-weight:600;font-size:19px;}
.card .en{color:var(--muted);font-size:14px;flex:1;}
.card .foot{display:flex;align-items:center;justify-content:space-between;margin-top:4px;}
.card .level{font-size:12px;color:var(--muted);letter-spacing:.05em;}
.card a.play{font-weight:600;color:var(--gold);text-decoration:none;}
.card a.play:hover{text-decoration:underline;}

.pillars{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;}
.pillar{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px 18px;}
.pillar .k{font-family:"Fraunces",serif;font-weight:600;color:var(--gold);font-size:30px;}
.pillar h4{font-size:16px;margin:8px 0 4px;}
.pillar p{font-size:13px;color:var(--muted);}
.exam-foot{display:flex;align-items:center;gap:18px;margin-top:26px;flex-wrap:wrap;}
.exam-foot .badges{color:var(--muted);font-size:13px;letter-spacing:.03em;}

.signup-wrap{padding:60px 0;}
.signup{background:var(--surface-2);border:1px solid var(--line);border-radius:24px;padding:44px 40px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;position:relative;overflow:hidden;}
.signup::before{content:"";position:absolute;inset:0;background:radial-gradient(40vw 30vh at 100% 0%,rgba(233,184,76,0.14),transparent 60%);pointer-events:none;}
.signup h2{font-family:"Fraunces",serif;font-weight:600;font-size:clamp(24px,4vw,34px);position:relative;}
.signup p{color:var(--muted);margin-top:8px;max-width:40ch;position:relative;}
.signup .btn{position:relative;}

footer.legal{padding:26px 0;font-size:13px;color:var(--muted);display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;}
footer.legal .legal-links{display:flex;gap:14px;}
footer.legal a{color:var(--muted);text-decoration:none;}
footer.legal a:hover{color:var(--gold);}

/* ---- legal pages (Terms, Privacy) ---- */
.legal-content{padding:8px 0 80px;}
.legal-content .updated{color:var(--muted);font-size:13px;margin-bottom:28px;}
.legal-content h2{font-size:21px;margin:32px 0 10px;}
.legal-content h2:first-of-type{margin-top:8px;}
.legal-content p{margin-bottom:14px;color:var(--text);}
.legal-content ul{margin:0 0 14px;padding-left:22px;color:var(--text);}
.legal-content li{margin-bottom:6px;}
.legal-content a{color:var(--gold);text-decoration:none;}
.legal-content a:hover{text-decoration:underline;}

.fade{opacity:0;transform:translateY(12px);animation:rise .7s ease forwards;}
.fade.d1{animation-delay:.06s;}
.fade.d2{animation-delay:.16s;}
@keyframes rise{to{opacity:1;transform:none;}}
@media(prefers-reduced-motion:reduce){
  .fade{animation:none;opacity:1;transform:none;}
  .match-card,.lib-card,.card,.step{transition:none;}
  .btn{transition:none;}
  .loading::before{animation:none;border-top-color:var(--gold);}
}

/* ---- focus visible for keyboard users ---- */
.match-card:focus-visible,.lib-card:focus-visible,.opt:focus-visible,.rubric-level:focus-visible,.skill-tile:focus-visible{outline:2px solid var(--gold);outline-offset:2px;}
.tab:focus-visible{outline:2px solid var(--gold);outline-offset:2px;}

/* ---- nav user stats (shared across all pages) ---- */
.nav-user{display:flex;align-items:center;gap:10px;font-size:14px;flex-wrap:wrap;justify-content:flex-end;}
.nav-streak{background:var(--gold-soft);color:var(--gold);border-radius:999px;padding:4px 10px;font-weight:600;font-size:13px;flex-shrink:0;}
.nav-xp{color:var(--muted);font-weight:500;font-size:13px;flex-shrink:0;}
.nav-username{font-weight:600;color:var(--text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:160px;}
.btn-signout{font-size:13px;padding:7px 14px;flex-shrink:0;border-color:var(--gold);color:var(--gold);}

/* ---- empty state ---- */
.empty-state{text-align:center;padding:48px 20px;color:var(--muted);}
.empty-state .empty-icon{font-size:36px;margin-bottom:12px;opacity:.5;}
.empty-state p{margin-bottom:8px;}

@media(max-width:760px){
  .hero{grid-template-columns:1fr;gap:30px;padding:36px 0;}
  .ladder{height:180px;gap:10px;}
  .step{border-radius:12px;padding:10px 8px;min-width:0;}
  .step .lvl{font-size:20px;}
  .step .tag{font-size:10px;}
  .cards{grid-template-columns:1fr;}
  .pillars{grid-template-columns:1fr 1fr;}
  .signup{padding:32px 24px;}
  .nav-user{gap:8px;}
  .nav-username{max-width:120px;font-size:13px;}
  .nav-streak,.nav-xp{font-size:12px;padding:3px 8px;}
  .btn-signout{font-size:12px;padding:6px 12px;}
}
@media(max-width:480px){
  .nav{flex-wrap:wrap;}
  .nav-actions{width:100%;justify-content:flex-end;}
  .ladder{height:150px;gap:8px;}
  .step{padding:8px 6px;border-radius:10px;}
  .step .lvl{font-size:18px;}
  .nav-username{max-width:100px;font-size:12px;}
}

/* ============================================================
   Session progress bar. Fixed to the top of active training
   sessions. Include <div class="session-bar"><div
   class="session-bar-fill" style="width:40%"></div></div> on
   any activity page and toggle the hidden attribute.
   ============================================================ */
.session-bar{position:fixed;top:0;left:0;right:0;height:4px;background:var(--surface-2);z-index:50;}
.session-bar[hidden]{display:none;}
.session-bar-fill{height:100%;background:linear-gradient(90deg,var(--gold),#F0D060);transition:width .4s ease;border-radius:0 2px 2px 0;}

/* ============================================================
   Topic Grid. A matrix of topics (rows) x CEFR levels (cols).
   Active cells glow gold and link to the matching activity.
   ============================================================ */
.topic-grid{display:flex;flex-direction:column;gap:2px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);}
.tg-row{display:grid;grid-template-columns:1fr repeat(4,80px);gap:1px;background:var(--line);}
.tg-header .tg-label{font-size:12px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;}
.tg-level-head{background:var(--surface-2);font-family:"Fraunces",serif;font-weight:600;font-size:16px;color:var(--gold);text-align:center;padding:14px 8px;}
.tg-label{background:var(--surface);padding:16px 20px;font-size:15px;font-weight:500;display:flex;align-items:center;gap:10px;min-height:56px;}
.tg-icon{color:var(--gold);font-size:16px;width:22px;text-align:center;flex-shrink:0;}
.tg-cell{background:var(--surface);display:flex;align-items:center;justify-content:center;padding:8px;}
.tg-dot{width:44px;height:44px;border-radius:12px;background:var(--gold-soft);border:2px solid rgba(233,184,76,0.3);display:grid;place-items:center;transition:transform .12s ease,background .15s ease,border-color .15s ease,box-shadow .15s ease;text-decoration:none;}
.tg-dot::after{content:"";width:14px;height:14px;border-radius:50%;background:var(--gold);transition:transform .15s ease;}
.tg-dot:hover{transform:scale(1.12);background:rgba(233,184,76,0.22);border-color:var(--gold);box-shadow:0 0 14px rgba(233,184,76,0.2);}
.tg-dot:active{transform:scale(0.96);}
.tg-dot:focus-visible{outline:2px solid var(--gold);outline-offset:2px;}
.tg-empty{opacity:.15;}
.tg-empty::after{content:"";width:8px;height:8px;border-radius:50%;background:var(--muted);}

/* ============================================================
   Flashcard Arena. 3D perspective flip using rotateY(180deg).
   Each card has a German front and English back. Gender is
   color coded: masculine=blue, feminine=rose, neuter=green.
   ============================================================ */
.flashcard-section{background:radial-gradient(50vw 40vh at 80% 20%,rgba(233,184,76,0.06),transparent 60%);}
.flashcard-deck{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:20px;perspective:1200px;}
.flashcard{height:240px;cursor:pointer;outline:none;-webkit-tap-highlight-color:transparent;}
.fc-inner{position:relative;width:100%;height:100%;transform-style:preserve-3d;transition:transform .6s cubic-bezier(0.4,0,0.2,1);}
.flashcard.flipped .fc-inner{transform:rotateY(180deg);}
.fc-front,.fc-back{position:absolute;inset:0;-webkit-backface-visibility:hidden;backface-visibility:hidden;border-radius:var(--radius);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px 16px;gap:6px;border:1px solid var(--line);}
.fc-front{background:var(--surface);}
.fc-front.fc-masculine{border-color:rgba(100,149,237,0.35);background:linear-gradient(160deg,var(--surface) 40%,rgba(100,149,237,0.07));}
.fc-front.fc-feminine{border-color:rgba(219,112,147,0.35);background:linear-gradient(160deg,var(--surface) 40%,rgba(219,112,147,0.07));}
.fc-front.fc-neuter{border-color:rgba(144,238,144,0.35);background:linear-gradient(160deg,var(--surface) 40%,rgba(144,238,144,0.07));}
.fc-article{font-size:13px;font-weight:600;color:var(--muted);letter-spacing:.06em;text-transform:lowercase;}
.fc-word{font-family:"Fraunces",serif;font-weight:600;font-size:26px;text-align:center;line-height:1.2;}
.fc-hint{font-size:11px;color:var(--muted);opacity:.5;margin-top:auto;}
.fc-back{background:var(--gold);color:#1a1500;transform:rotateY(180deg);border-color:var(--gold);}
.fc-en{font-family:"Fraunces",serif;font-weight:600;font-size:28px;text-align:center;}
.fc-back .fc-hint{color:rgba(26,21,0,0.45);}
.fc-actions{display:flex;gap:14px;justify-content:center;margin-top:30px;flex-wrap:wrap;}
.fc-counter{text-align:center;margin-top:12px;font-size:13px;color:var(--muted);}
.fc-level{text-align:center;margin-top:4px;font-size:14px;font-weight:600;color:var(--gold);}

/* ============================================================
   Mobile-first touch-target sizing. All interactive elements
   get at least 44x44px on coarse-pointer (touch) devices.
   ============================================================ */
@media(pointer:coarse){
  .btn{min-height:44px;min-width:44px;padding:12px 22px;}
  .tab{min-height:44px;}
  .opt{min-height:44px;padding:14px 16px;}
  .match-card{min-height:48px;padding:16px 14px;}
  .tg-dot{min-width:44px;min-height:44px;}
  .rubric-level{min-height:44px;padding:12px 16px;}
  .skill-tile .btn,.card a.play{min-height:44px;min-width:44px;display:inline-flex;align-items:center;justify-content:center;}
  .flashcard{min-height:200px;}
}

@media(max-width:760px){
  .tg-row{grid-template-columns:1fr repeat(4,60px);}
  .tg-label{font-size:13px;padding:12px 14px;min-height:48px;}
  .tg-level-head{font-size:14px;padding:10px 4px;}
  .tg-dot{width:40px;height:40px;border-radius:10px;}
  .flashcard-deck{grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:14px;}
  .flashcard{height:210px;}
  .fc-word{font-size:22px;}
  .fc-en{font-size:24px;}
}

@media(max-width:480px){
  .tg-row{grid-template-columns:1fr repeat(4,50px);}
  .tg-label{font-size:12px;padding:10px 10px;}
  .tg-icon{display:none;}
  .tg-dot{width:36px;height:36px;border-radius:8px;}
  .tg-dot::after{width:10px;height:10px;}
  .flashcard-deck{grid-template-columns:1fr 1fr;gap:12px;}
  .flashcard{height:190px;}
  .fc-word{font-size:20px;}
  .fc-en{font-size:22px;}
  .fc-front,.fc-back{padding:18px 12px;}
}