:root{
  color-scheme:light dark;
  --canvas:#f3eee4; --surface:#fffdf8; --surface-2:#f9f4ea;
  --ink:#18211f; --muted:#5b635e; --line:#ded5c5;
  --cinnabar:#a9342f; --cinnabar-strong:#872621; --cinnabar-soft:#f4dfd9;
  --jade:#27745b; --jade-soft:#dcece4; --gold:#8b5e12;
  --disabled-ink:var(--muted); --disabled-bg:var(--surface-2); --disabled-line:var(--line);
  --cinnabar-fill:var(--cinnabar); --cinnabar-fill-strong:var(--cinnabar-strong); --jade-fill:var(--jade);
  --shadow-sm:0 1px 2px rgba(35,29,22,.06),0 8px 22px rgba(35,29,22,.05);
  --shadow-lg:0 18px 48px rgba(35,29,22,.12);
  --radius-sm:10px; --radius-md:16px; --radius-lg:24px;
  --ease:cubic-bezier(.2,.75,.25,1);
  --hanzi:"Noto Serif SC","Songti SC","STSong","SimSun",serif;
  --ui:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  --paper:var(--canvas); --paper-2:var(--surface); --ink-soft:var(--muted);
  --shadow:var(--shadow-lg); --radius:var(--radius-md);
}

@media (prefers-color-scheme:dark){
  :root{
    --canvas:#101817; --surface:#182220; --surface-2:#202c29;
    --ink:#f1ebe0; --muted:#aaa99f; --line:#374641;
    --cinnabar:#df675b; --cinnabar-strong:#f17a6c; --cinnabar-soft:#402825;
    --jade:#68b895; --jade-soft:#213d34; --gold:#d2a55c;
    --disabled-ink:var(--muted); --disabled-bg:var(--surface-2); --disabled-line:var(--line);
    --cinnabar-fill:#872621; --cinnabar-fill-strong:#6b1d1b; --jade-fill:#1d624a;
    --shadow-sm:0 1px 2px rgba(0,0,0,.26),0 9px 24px rgba(0,0,0,.2);
    --shadow-lg:0 20px 54px rgba(0,0,0,.34);
  }
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
html{background:var(--canvas);scroll-behavior:smooth}
body{
  min-height:100vh;background-color:var(--canvas);color:var(--ink);
  font:16px/1.5 var(--ui);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  background-image:
    radial-gradient(circle at 18% 0,rgba(169,52,47,.055),transparent 36rem),
    radial-gradient(circle at 92% 30%,rgba(39,116,91,.045),transparent 34rem),
    repeating-linear-gradient(112deg,transparent 0,transparent 7px,rgba(68,57,43,.018) 8px,transparent 9px);
}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button,input,select,textarea,.brand{-webkit-tap-highlight-color:transparent}
:focus-visible{outline:3px solid var(--cinnabar);outline-offset:3px;border-radius:6px}

/* ---------- shell e navigazione ---------- */
.wrap{
  width:min(100%,1160px);margin:0 auto;
  padding:0 16px calc(112px + env(safe-area-inset-bottom));
}
header.top{
  position:sticky;top:0;z-index:40;border-bottom:1px solid color-mix(in srgb,var(--line) 78%,transparent);
  background:color-mix(in srgb,var(--canvas) 91%,transparent);backdrop-filter:blur(18px);
}
.top-in{width:min(100%,1160px);min-height:68px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;gap:16px}
.brand{
  display:flex;align-items:center;gap:11px;min-width:0;margin-right:auto;padding:3px 5px 3px 3px;
  border-radius:var(--radius-sm);cursor:pointer;transition:background .18s var(--ease),transform .18s var(--ease);
}
.brand:hover{background:color-mix(in srgb,var(--surface) 70%,transparent)}
.brand:active{transform:translateY(1px)}
.seal{
  width:42px;height:42px;flex:none;display:grid;place-items:center;border-radius:11px;
  color:#fff8ed;background:var(--cinnabar-fill);box-shadow:inset 0 0 0 1px rgba(255,255,255,.18),0 5px 16px rgba(135,38,33,.2);
  font:25px/1 var(--hanzi);
}
.brand h1{margin:0;font-size:17px;font-weight:720;letter-spacing:-.015em;line-height:1.2}
.brand span{display:block;overflow:hidden;color:var(--muted);font-size:11px;letter-spacing:.02em;white-space:nowrap;text-overflow:ellipsis}
nav.tabs{
  position:fixed;left:12px;right:12px;bottom:calc(10px + env(safe-area-inset-bottom));z-index:70;
  display:flex;gap:4px;padding:5px;border:1px solid color-mix(in srgb,var(--line) 88%,transparent);
  border-radius:18px;background:color-mix(in srgb,var(--surface) 94%,transparent);box-shadow:var(--shadow-lg);
  backdrop-filter:blur(20px) saturate(1.2);
}
nav.tabs button{
  flex:1;min-width:0;min-height:52px;padding:5px 8px;border:0;border-radius:13px;background:transparent;
  color:var(--muted);font-size:11px;font-weight:680;line-height:1.1;letter-spacing:.01em;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  transition:color .2s var(--ease),background .2s var(--ease),transform .16s var(--ease);
}
nav.tabs button:hover{color:var(--ink);background:var(--surface-2)}
nav.tabs button:active{transform:scale(.97)}
nav.tabs button[aria-selected="true"]{color:#fffaf0;background:var(--cinnabar-fill);box-shadow:0 6px 16px rgba(135,38,33,.2)}
.tab-icon{font:18px/1 var(--hanzi)}
main{padding-top:26px}
section[role=tabpanel][hidden]{display:none}
.page-head{max-width:690px;margin-bottom:24px}
.eyebrow{margin:0 0 5px;color:var(--cinnabar);font-size:11px;font-weight:760;letter-spacing:.16em;text-transform:uppercase}
h2.sec{margin:0 0 6px;font-family:var(--hanzi);font-size:clamp(28px,8vw,40px);font-weight:650;letter-spacing:-.035em;line-height:1.12}
p.sub{margin:0;color:var(--muted);font-size:14px;line-height:1.6}

/* ---------- controlli condivisi ---------- */
.panel{padding:18px;border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--surface);box-shadow:var(--shadow-sm)}
.field{margin-bottom:17px}
.field label{display:block;margin-bottom:7px;font-size:13px;font-weight:700;letter-spacing:.005em}
.field .hint{margin-left:5px;color:var(--muted);font-size:11px;font-weight:450}
.field input,.field textarea,.field select,.toolbar input[type=search],.toolbar select,.typing-form input{
  width:100%;min-height:48px;padding:11px 13px;border:1px solid var(--line);border-radius:var(--radius-sm);
  background:var(--surface-2);box-shadow:inset 0 1px 0 rgba(255,255,255,.28);
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease);
}
.field input:hover,.field textarea:hover,.field select:hover,.toolbar input:hover,.toolbar select:hover,.typing-form input:hover{border-color:color-mix(in srgb,var(--muted) 65%,var(--line))}
.field input:focus,.field textarea:focus,.field select:focus,.toolbar input:focus,.toolbar select:focus,.typing-form input:focus{
  border-color:var(--cinnabar);outline:0;background:var(--surface);box-shadow:0 0 0 3px color-mix(in srgb,var(--cinnabar) 18%,transparent);
}
.field textarea{min-height:82px;resize:vertical}
.field input.hanzi-in{padding:7px 12px;font:32px/1.3 var(--hanzi);text-align:center}
.row2{display:grid;grid-template-columns:1fr;gap:0}
.btn{
  min-height:46px;padding:10px 17px;border:1px solid var(--line);border-radius:var(--radius-sm);
  background:var(--surface-2);color:var(--ink);box-shadow:0 1px 1px rgba(35,29,22,.04);
  font-size:14px;font-weight:700;line-height:1.15;
  transition:transform .14s var(--ease),border-color .18s var(--ease),background .18s var(--ease),box-shadow .18s var(--ease),color .18s var(--ease);
}
.btn:hover{border-color:color-mix(in srgb,var(--muted) 72%,var(--line));background:var(--surface)}
.btn:active{transform:translateY(1px) scale(.985);box-shadow:none}
.btn.primary{border-color:var(--cinnabar-fill);background:var(--cinnabar-fill);color:#fffaf2;box-shadow:0 7px 18px rgba(135,38,33,.17)}
.btn.primary:hover{border-color:var(--cinnabar-fill-strong);background:var(--cinnabar-fill-strong)}
.btn.ghost{border-color:transparent;background:transparent;box-shadow:none}
.btn.ghost:hover{border-color:var(--line);background:var(--surface-2)}
.btn.danger{border-color:color-mix(in srgb,var(--cinnabar) 35%,var(--line));color:var(--cinnabar);background:transparent}
.btn.danger:hover{border-color:var(--cinnabar);background:var(--cinnabar-soft)}
.btn.sm{min-height:44px;padding:8px 12px;border-radius:9px;font-size:13px}
.btn[disabled]{cursor:not-allowed;opacity:1;color:var(--disabled-ink);background:var(--disabled-bg);border-color:var(--disabled-line);box-shadow:none;filter:none}
.btn[disabled]:hover{cursor:not-allowed;opacity:1;color:var(--disabled-ink);background:var(--disabled-bg);border-color:var(--disabled-line);box-shadow:none;transform:none;filter:none}
.btn[disabled]:active{transform:none}
.actions{display:flex;gap:9px;flex-wrap:wrap;margin-top:20px}
.url-row{display:flex;align-items:stretch;gap:8px}
.url-row input{min-width:0;flex:1}
.img-status{min-height:18px;margin-top:6px;font-size:12px}
.img-status.ok{color:var(--jade)}
.img-status.err{color:var(--cinnabar)}
.field-note{margin:7px 0 0;color:var(--muted);font-size:12px;line-height:1.55}

/* ---------- catalogo ---------- */
.catalog-summary{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:0 0 20px}
.summary-card{
  min-width:0;min-height:62px;padding:8px 10px;border:1px solid var(--line);border-radius:12px;
  background:var(--surface);box-shadow:var(--shadow-sm);display:grid;grid-template-columns:minmax(0,1fr);
  grid-template-rows:auto auto;align-content:center;justify-items:center;row-gap:3px;text-align:center;
}
.summary-card--lead{
  grid-column:auto;min-height:62px;padding:8px 10px;border-color:var(--cinnabar-soft);border-top:3px solid var(--cinnabar);
  color:var(--ink);background:var(--surface);box-shadow:var(--shadow-sm);
}
.summary-card--lead::after{
  display:none;
}
.summary-label{grid-column:1/-1;max-width:100%;color:var(--muted);font-size:10px;font-weight:770;letter-spacing:.08em;line-height:1.1;text-align:center;text-transform:uppercase;overflow-wrap:anywhere}
.summary-card--lead .summary-label{color:var(--cinnabar)}
.summary-card strong{grid-column:1/-1;align-self:center;justify-self:center;margin:2px 0 0;color:var(--ink);font-size:22px;font-weight:730;letter-spacing:-.04em;line-height:1;font-variant-numeric:tabular-nums}
.summary-card--lead strong{font-size:23px}
.grid-decks{display:grid;grid-template-columns:minmax(0,1fr);gap:14px}
.deck{
  --deck-accent:var(--jade);--deck-soft:var(--jade-soft);position:relative;overflow:hidden;
  padding:19px;border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--surface);box-shadow:var(--shadow-sm);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.deck::before{content:"";position:absolute;top:0;left:22px;right:22px;height:3px;border-radius:0 0 9px 9px;background:var(--deck-accent)}
.deck[data-tone="mine"]{--deck-accent:var(--cinnabar);--deck-soft:var(--cinnabar-soft)}
.deck[data-tone="hsk"]{--deck-accent:var(--gold);--deck-soft:color-mix(in srgb,var(--gold) 18%,var(--surface))}
.deck-head{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;margin:3px 0 0}
.deck-head h3{margin:2px 0 0;font-family:var(--hanzi);font-size:22px;font-weight:680;letter-spacing:-.025em;line-height:1.2}
.deck-kicker{color:var(--deck-accent);font-size:10px;font-weight:800;letter-spacing:.14em;text-transform:uppercase}
.deck-badge-group{display:flex;align-items:center;gap:6px;flex:none}
.deck-total,.deck-progress-pill{
  width:64px;min-height:29px;display:inline-flex;align-items:center;justify-content:center;gap:3px;
  padding:6px;border-radius:999px;background:var(--deck-soft);color:var(--muted);
  font-size:10px;line-height:1;white-space:nowrap;text-align:center;
}
.deck-total strong,.deck-progress-pill strong{color:var(--ink);font-size:12px;font-variant-numeric:tabular-nums}
.deck-progress-pill{color:var(--deck-accent)}
.deck-desc{min-height:2.8em;margin:8px 0 17px;color:var(--muted);font-size:13px;line-height:1.45}
.deck-metrics,.deck-num{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px;margin:14px 0 16px}
.deck-metrics span{min-width:0;padding:8px 6px;border-radius:9px;background:var(--surface-2);color:var(--muted);font-size:10px;line-height:1.25;text-align:center}
.deck-metrics strong{display:block;margin-bottom:2px;color:var(--ink);font-size:15px;font-weight:720;font-variant-numeric:tabular-nums}
.deck-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.deck-actions .btn{width:100%;padding-inline:8px}
.deck-actions [data-sfoglia]{grid-column:1/-1}
.deck-empty{margin:11px 0 0;padding:9px 11px;border-radius:9px;background:var(--cinnabar-soft);color:var(--cinnabar);font-size:11px;line-height:1.4}
.badge{
  display:inline-flex;align-items:center;justify-content:center;min-width:21px;height:19px;padding:0 5px;margin-left:5px;
  border-radius:99px;background:color-mix(in srgb,var(--ink) 11%,transparent);font-size:10px;font-variant-numeric:tabular-nums;
}
.btn.primary .badge{background:rgba(255,255,255,.2)}
.btn[disabled] .badge{opacity:1}
.tools-note{padding:6px 2px;color:var(--muted);font-size:12px}

/* ---------- creazione e flashcard ---------- */
.grid-create{display:grid;grid-template-columns:minmax(0,1fr);gap:22px;align-items:start}
.create-preview{grid-row:1;max-width:380px;width:100%;margin-inline:auto}
#form-card{grid-row:2}
.card{width:100%;padding:0;border:0;background:none;display:block;perspective:1400px;container-type:inline-size}
.card-inner{
  position:relative;width:100%;aspect-ratio:3/4;transform-style:preserve-3d;
  transition:transform .55s var(--ease);
}
.card.flipped .card-inner{transform:rotateY(180deg)}
.face{
  position:absolute;inset:0;overflow:hidden;padding:18px;border:1px solid var(--line);border-radius:var(--radius-lg);
  background:var(--surface);box-shadow:var(--shadow-lg);backface-visibility:hidden;-webkit-backface-visibility:hidden;
  display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;
}
.face::before{content:"";position:absolute;inset:10px;border:1px solid color-mix(in srgb,var(--line) 52%,transparent);border-radius:calc(var(--radius-lg) - 8px);pointer-events:none}
.face.back{transform:rotateY(180deg)}
.face .hanzi{max-width:100%;font-family:var(--hanzi);line-height:1.05;word-break:break-word;overflow-wrap:anywhere}

/* La dimensione segue la larghezza della CARTA, non della finestra: in una
   miniatura della griglia 18vw restava enorme e il testo usciva dal riquadro.
   cqw = percentuale della larghezza del contenitore. */
.face .hanzi.len-1{font-size:min(46cqw,150px)}
.face .hanzi.len-2{font-size:min(34cqw,110px)}
.face .hanzi.len-3{font-size:min(25cqw,84px)}
.face .hanzi.len-4{font-size:min(20cqw,68px)}

/* Browser senza container query: si ripiega su corpi fissi per lunghezza,
   piu piccoli ma sempre dentro il riquadro. */
@supports not (container-type: inline-size){
  .face .hanzi.len-1{font-size:clamp(44px,12vw,120px)}
  .face .hanzi.len-2{font-size:clamp(34px,9vw,88px)}
  .face .hanzi.len-3{font-size:clamp(26px,7vw,66px)}
  .face .hanzi.len-4{font-size:clamp(22px,6vw,54px)}
}
.face .tagchip{position:absolute;top:13px;right:15px;padding:4px 9px;border-radius:99px;background:var(--cinnabar-soft);color:var(--cinnabar);font-size:10px;font-weight:720}
.face .img-box{width:100%;min-height:0;flex:1;display:grid;place-items:center;overflow:hidden;border-radius:var(--radius-sm);background:var(--surface-2)}
.face .img-box img{display:block;max-width:100%;max-height:100%;object-fit:contain}
.face .img-box .noimg{padding:20px;color:var(--muted);font-size:13px}
.face .pinyin{margin-top:12px;color:var(--cinnabar);font-size:clamp(18px,4.4vw,28px);font-weight:650;letter-spacing:.01em}
.face .meaning{margin-top:2px;color:var(--muted);font-size:15px}
.face .note{margin-top:8px;color:var(--muted);font-size:12px;font-style:italic}
.face .meaning.veiled{visibility:hidden}

/* ---------- archivio ---------- */
.toolbar{display:flex;flex-direction:column;align-items:stretch;gap:12px;margin-bottom:22px}
.toolbar-group{display:flex;flex-wrap:wrap;gap:8px}
.toolbar input[type=search]{min-width:0;flex:1 1 100%}
.toolbar select{min-width:0;flex:1 1 150px}
.stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;margin-bottom:20px}
.stat-card{padding:12px;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--surface)}
.stat-value{display:block;color:var(--ink);font-size:20px;font-weight:720;font-variant-numeric:tabular-nums}
.stat-label{display:block;margin-top:2px;color:var(--muted);font-size:11px}
.grid-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(145px,1fr));gap:16px}
.cell .card-inner{aspect-ratio:3/4}
.cell .tools{display:flex;gap:6px;justify-content:center;margin-top:8px;opacity:1;transition:opacity .18s var(--ease)}
.box-dots{position:absolute;right:0;bottom:10px;left:0;display:flex;justify-content:center;gap:4px}
.box-dots i{display:block;width:6px;height:6px;border-radius:99px;background:var(--line)}
.box-dots i.on{background:var(--jade)}
.empty{padding:48px 20px;border:1px dashed var(--line);border-radius:var(--radius-lg);background:color-mix(in srgb,var(--surface) 55%,transparent);color:var(--muted);text-align:center}
.empty .big{display:block;margin-bottom:12px;color:var(--line);font:48px/1 var(--hanzi)}
.empty-actions{margin-top:16px}

/* ---------- setup e sessione di studio ---------- */
.review-setup{width:min(100%,640px);margin-inline:auto}
.review-setup .field{margin-bottom:15px}
.review-setup .field:last-child{margin-bottom:0}
.setup-group{
  padding:16px;border:1px solid color-mix(in srgb,var(--line) 82%,transparent);
  border-radius:var(--radius-md);background:var(--surface-2);
}
.setup-group + .setup-group{margin-top:12px}
.review-setup > .actions{margin-top:18px}
.review-setup #btn-start{width:100%;min-height:48px}
.review-stage{
  width:min(100%,460px);max-height:calc(100vh - 104px);max-height:calc(100dvh - 104px);margin:0 auto;padding:2px 3px 8px;
  overflow-y:auto;overscroll-behavior:contain;scrollbar-width:thin;
}
.progress{height:6px;margin-bottom:16px;overflow:hidden;border-radius:99px;background:var(--line)}
.progress i{display:block;height:100%;background:var(--cinnabar);transition:width .3s var(--ease)}
.review-meta{display:flex;justify-content:space-between;margin-bottom:10px;color:var(--muted);font-size:12px;font-variant-numeric:tabular-nums}
.review-stage #review-card{width:min(100%,54vh,420px);margin-inline:auto}
.review-stage #review-card .card-inner{max-height:min(72vh,560px)}
.review-actions{display:grid;grid-template-columns:minmax(0,1fr);gap:9px;margin-top:16px}
.review-actions .btn{width:100%;min-height:52px;padding:12px 10px}
.review-primary{grid-column:1/-1}
.btn.know{border-width:2px;border-color:var(--jade);color:var(--jade);font-weight:780}
.btn.again{border-width:2px;border-color:var(--cinnabar);color:var(--cinnabar);font-weight:780}
.btn.know[disabled],.btn.again[disabled]{color:var(--disabled-ink);background:var(--disabled-bg);border-color:var(--disabled-line);cursor:not-allowed}
.btn.translate{border-color:color-mix(in srgb,var(--gold) 45%,var(--line));color:var(--gold)}
.btn.translate[disabled]{cursor:not-allowed;opacity:1;color:var(--disabled-ink);background:var(--disabled-bg);border-color:var(--disabled-line)}
.keys{margin-top:14px;color:var(--muted);font-size:11px;text-align:center}
.keys kbd{padding:2px 6px;border:1px solid var(--line);border-bottom-width:2px;border-radius:5px;font:10px var(--ui)}
.summary{width:min(100%,640px);margin-inline:auto;padding:16px;text-align:center}
.summary-result{
  position:relative;isolation:isolate;overflow:hidden;padding:32px 18px 27px;border-radius:calc(var(--radius-lg) - 6px);
  color:#fff8ee;background:linear-gradient(145deg,var(--cinnabar-fill-strong),var(--cinnabar-fill));
  box-shadow:0 16px 36px rgba(135,38,33,.2);
}
.summary-result::after{
  content:"成";position:absolute;right:-12px;bottom:-43px;z-index:-1;color:rgba(255,255,255,.1);
  font:148px/1 var(--hanzi);transform:rotate(-8deg);pointer-events:none;
}
.summary-kicker{display:block;color:rgba(255,248,238,.82);font-size:10px;font-weight:800;letter-spacing:.16em;text-transform:uppercase}
.summary-score{display:block;margin:7px 0 20px;font-size:clamp(62px,22vw,92px);font-weight:720;letter-spacing:-.065em;line-height:.95;font-variant-numeric:tabular-nums}
.summary-breakdown{display:flex;flex-wrap:wrap;justify-content:center;gap:7px;margin:0}
.summary-breakdown span{padding:7px 10px;border:1px solid rgba(255,255,255,.24);border-radius:999px;background:rgba(255,255,255,.1);font-size:11px;font-weight:680;white-space:nowrap}
.summary-actions{display:grid;grid-template-columns:minmax(0,1fr);gap:9px;margin-top:14px}
.summary-actions .btn{width:100%;min-height:52px}
.back-link{display:inline-flex;align-items:center;margin-bottom:12px}
.scope-count{margin:6px 0 0;color:var(--muted);font-size:12px}
.quiz,.quiz-opts,.typing-form,.listen,.writing-box{
  border:1px solid var(--line);background:var(--surface);box-shadow:var(--shadow-sm);
}
.quiz{
  min-height:240px;padding:30px 20px;border-radius:var(--radius-lg);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;text-align:center;
}
.quiz-prompt{max-width:100%;font-family:inherit;line-height:1.1;overflow-wrap:anywhere}
.quiz-prompt.len-1{font-size:clamp(56px,14vw,88px)}
.quiz-prompt.len-2{font-size:clamp(46px,11vw,72px)}
.quiz-prompt.len-3{font-size:clamp(36px,9vw,58px)}
.quiz-prompt.len-4{font-size:clamp(30px,7vw,48px)}
.quiz-note{margin:0;color:var(--muted);font-size:13px}
.quiz-opts{display:grid;grid-template-columns:1fr;gap:8px;margin-top:12px;padding:10px;border-radius:var(--radius-md)}
.quiz-opt{min-height:52px;display:flex;align-items:center;justify-content:flex-start;gap:10px;padding:12px 14px;text-align:left}
.quiz-num{width:23px;height:23px;flex:none;display:inline-flex;align-items:center;justify-content:center;border-radius:6px;background:color-mix(in srgb,var(--ink) 8%,transparent);font-size:12px}
.quiz-opt.is-ok{border-width:2px;border-color:var(--jade-fill);border-radius:15px;background:var(--jade-fill);color:#fff;font-weight:800;box-shadow:0 7px 18px color-mix(in srgb,var(--jade-fill) 25%,transparent)}
.quiz-opt.is-ko{border-width:2px;border-color:var(--cinnabar-fill-strong);border-radius:15px;background:var(--cinnabar-fill-strong);color:#fff;font-weight:800;box-shadow:0 7px 18px color-mix(in srgb,var(--cinnabar-fill-strong) 25%,transparent)}
.quiz-opt.is-ok::after,.quiz-opt.is-ko::after{width:26px;height:26px;flex:none;display:grid;place-items:center;margin-left:auto;border:2px solid currentColor;background:rgba(255,255,255,.12);font-size:16px;line-height:1}
.quiz-opt.is-ok::after{content:"✓";border-radius:50%}
.quiz-opt.is-ko::after{content:"×";border-radius:5px}
.quiz-opt.is-ok .quiz-num,.quiz-opt.is-ko .quiz-num{background:rgba(255,255,255,.2)}
.typing-form{display:grid;grid-template-columns:minmax(0,1fr);gap:8px;margin-top:12px;padding:10px;border-radius:var(--radius-md)}
.typing-form input{min-width:0}
.typing-form .btn{width:100%;min-height:50px}
.typing-esito{width:100%;margin-top:8px;padding:11px 13px;border-left:5px solid currentColor;border-radius:var(--radius-sm);font-size:16px;font-weight:650;text-align:left}
.typing-esito.esatto{color:var(--jade);background:var(--jade-soft)}
.typing-esito.quasi{color:var(--ink);border-left-color:var(--gold);background:color-mix(in srgb,var(--gold) 15%,var(--surface))}
.typing-esito.errato{color:var(--ink);border-left-color:var(--cinnabar);background:var(--cinnabar-soft)}
.listen-play{min-width:72px;min-height:72px;border:1px solid var(--line);border-radius:50%;background:var(--surface-2);box-shadow:var(--shadow-sm);font-size:40px;line-height:1}
.listen-hint,.listen-warn,.listen-err,.listen-pinyin,.listen-meaning{margin:0}
.listen-hint{color:var(--muted);font-size:13px}
.listen-warn{color:var(--gold);font-size:12px}
.listen-err{color:var(--cinnabar);font-size:13px}
.listen-pinyin{margin-top:4px;font-size:20px}
.listen-meaning{margin-top:2px;color:var(--muted);font-size:15px}
.writing-hint{margin:0;color:var(--muted);font-size:15px}
.writing-box{position:relative;width:220px;max-width:100%;height:220px;overflow:hidden;border-radius:var(--radius-md);background:#fffdf8;touch-action:none}
.writing-box svg,.writing-box canvas{display:block;width:100%;max-width:100%;height:auto;touch-action:none}
.writing-step{margin:0;color:var(--muted);font-size:12px}
.audio-field input[type=range]{width:100%}
.audio-state{margin:6px 0 0;color:var(--muted);font-size:12px}
.audio-state.warn{color:var(--gold)}
.audio-state.err{color:var(--cinnabar)}
.toast{
  position:fixed;left:50%;bottom:calc(91px + env(safe-area-inset-bottom));z-index:80;
  max-width:calc(100% - 32px);padding:11px 18px;border:1px solid color-mix(in srgb,var(--surface) 18%,transparent);
  border-radius:99px;background:var(--ink);color:var(--canvas);box-shadow:var(--shadow-lg);
  font-size:13px;text-align:center;transform:translateX(-50%) translateY(160%);
  opacity:0;visibility:hidden;pointer-events:none;
  transition:transform .28s var(--ease),opacity .28s var(--ease),visibility 0s linear .28s;
}
.toast.show{transform:translateX(-50%) translateY(0);opacity:1;visibility:visible;transition-delay:0s,0s,0s}

/* Sessione scaduta: da quel momento niente arriva piu al server, quindi
   l'avviso resta in cima e non se ne va da solo come un toast. */
.sync-gone{
  position:fixed;left:0;right:0;top:0;z-index:120;
  padding:10px 16px;border-bottom:1px solid color-mix(in srgb,var(--surface) 18%,transparent);
  background:var(--ink);color:var(--canvas);font-size:13px;text-align:center;
}
.sync-gone a{color:var(--canvas);text-decoration:underline;font-weight:600}

@media (max-width:699px){
  header.top{backdrop-filter:none}
  body[data-view="ripasso"] .tabs{display:none}
  body[data-view="ripasso"] #btn-back{display:inline-flex}
  body[data-view="ripasso"] .wrap{padding-bottom:calc(34px + env(safe-area-inset-bottom))}
  body[data-view="ripasso"] .toast{bottom:calc(18px + env(safe-area-inset-bottom))}
}

@media (min-width:380px){
  .review-actions{grid-template-columns:repeat(auto-fit,minmax(100px,1fr))}
  .quiz-opts,.typing-form,.summary-actions{grid-template-columns:repeat(2,minmax(0,1fr))}
  .typing-form input{grid-column:1/-1}
}

@media (min-width:480px){
  .wrap,.top-in{padding-left:22px;padding-right:22px}
  .row2{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
  .deck-actions{grid-template-columns:repeat(3,minmax(0,1fr))}
  .deck-actions [data-sfoglia]{grid-column:auto}
}

@media (max-width:699px){
  body[data-view="mazzi"] main{padding-top:18px}
  #pan-mazzi .page-head{margin-bottom:16px}
  #pan-mazzi .catalog-summary{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-bottom:14px}
  #pan-mazzi .summary-card,#pan-mazzi .summary-card--lead{min-height:58px;padding:7px 7px;column-gap:5px}
  #pan-mazzi .summary-label{font-size:9px;letter-spacing:.05em}
  #pan-mazzi .summary-card strong,#pan-mazzi .summary-card--lead strong{font-size:21px}
  #pan-mazzi .grid-decks{gap:10px}
  #pan-mazzi .deck{padding:14px}
  #pan-mazzi .deck-kicker{display:block;max-width:100%;font-size:10px;letter-spacing:.1em;line-height:1.25;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  #pan-mazzi .deck-desc{min-height:0;margin:6px 0 11px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  #pan-mazzi .deck-metrics{margin:10px 0 12px}
  #pan-mazzi .deck-metrics span{padding:6px 4px;font-size:10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
}

@media (min-width:390px) and (max-width:699px){
  #pan-mazzi .grid-decks{grid-template-columns:repeat(2,minmax(0,1fr))}
  #pan-mazzi .deck-head{display:block}
  #pan-mazzi .deck-head > div:first-child{min-width:0}
  #pan-mazzi .deck-head h3{max-width:100%;font-size:19px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  #pan-mazzi .deck-badge-group{gap:4px;margin-top:7px;justify-content:flex-start}
  #pan-mazzi .deck-total,#pan-mazzi .deck-progress-pill{width:auto;min-width:48px;min-height:28px;padding:5px 9px;font-size:9px}
  #pan-mazzi .deck-total strong,#pan-mazzi .deck-progress-pill strong{font-size:10px}
  #pan-mazzi .deck-kicker{font-size:10px}
  #pan-mazzi .deck-actions{grid-template-columns:minmax(0,1fr)}
  #pan-mazzi .deck-actions [data-sfoglia]{grid-column:auto}
}

@media (min-width:700px){
  .wrap{padding-bottom:54px}
  .top-in{min-height:76px}
  .brand h1{font-size:19px}
  .brand span{font-size:12px}
  nav.tabs{
    position:static;display:flex;width:auto;padding:4px;border-radius:12px;background:var(--surface);box-shadow:var(--shadow-sm);backdrop-filter:none;
  }
  nav.tabs button{min-width:106px;min-height:44px;padding:8px 13px;flex-direction:row;gap:7px;font-size:13px}
  .tab-icon{font-size:16px}
  main{padding-top:40px}
  .page-head{margin-bottom:30px}
  .catalog-summary{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-bottom:22px}
  .summary-card,.summary-card--lead{min-height:68px;padding:10px}
  .summary-card:not(.summary-card--lead){padding:14px}
  .grid-decks{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
  .panel{padding:22px}
  .toolbar{align-items:flex-start}
  .toolbar input[type=search]{flex-basis:280px}
  .stats{grid-template-columns:repeat(4,minmax(0,1fr))}
  .grid-cards{grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:22px}
  .toast{bottom:28px}
}

@media (min-width:880px){
  .grid-create{grid-template-columns:minmax(0,1fr) minmax(320px,420px)}
  #form-card{grid-column:1;grid-row:1}
  .create-preview{grid-column:2;grid-row:1;position:sticky;top:112px}
}

@media (min-width:900px){
  .grid-decks{grid-template-columns:repeat(3,minmax(0,1fr))}
  .deck:hover{transform:translateY(-2px);border-color:color-mix(in srgb,var(--deck-accent) 35%,var(--line));box-shadow:var(--shadow-lg)}
}

@media (hover:hover){
  .cell:hover .tools .btn{border-color:color-mix(in srgb,var(--cinnabar) 34%,var(--line))}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;
    animation-iteration-count:1!important;transition-duration:.01ms!important}
}