:root{
  --bg:#f6f3ec;
  --bg2:#efe9dd;
  --surface:#ffffff;
  --surface-2:#f4f1ea;
  --ink:#182228;
  --ink-2:#5a6a72;
  --line:#e2ddd1;
  --brand:#0f6b63;
  --brand-2:#0b534d;
  --accent:#e0913a;
  --ok:#1c8a5a;
  --ok-bg:#e4f4ea;
  --bad:#c8443c;
  --bad-bg:#fbe9e7;
  --radius:20px;
  --shadow:0 1px 2px rgba(24,34,40,.05),0 8px 24px rgba(24,34,40,.06);
  --shadow-lg:0 18px 60px rgba(24,34,40,.16);
  --tap:56px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang TC","PingFang HK","Noto Sans TC","Microsoft JhengHei",system-ui,sans-serif;
}
html[data-theme="dark"]{
  --bg:#0e1519;
  --bg2:#0a1013;
  --surface:#162127;
  --surface-2:#1c2a31;
  --ink:#eef4f4;
  --ink-2:#93a6ad;
  --line:#26353c;
  --brand:#3fb8a8;
  --brand-2:#2f9b8d;
  --accent:#eaa757;
  --ok:#4cc38a;
  --ok-bg:#12301f;
  --bad:#f0736a;
  --bad-bg:#33191a;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px rgba(0,0,0,.35);
  --shadow-lg:0 24px 70px rgba(0,0,0,.6);
}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
[hidden]{display:none!important}
html,body{height:100%}
body{
  font-family:var(--font);
  background:radial-gradient(120% 80% at 50% 0%,var(--bg) 0%,var(--bg2) 100%);
  background-attachment:fixed;
  color:var(--ink);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
  padding-bottom:calc(84px + env(safe-area-inset-bottom));
}
svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;display:block}
.ico-play{fill:currentColor;stroke:none}

.app{max-width:720px;margin:0 auto;padding:0 16px}

/* ---------- header ---------- */
.top{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:calc(18px + env(safe-area-inset-top)) 2px 14px;
}
.brand h1{font-size:1.32rem;letter-spacing:.01em;font-weight:700}
.brand p{font-size:.8rem;color:var(--ink-2);margin-top:2px}
.icon-btn{
  width:44px;height:44px;display:grid;place-items:center;border:1px solid var(--line);
  background:var(--surface);color:var(--ink-2);border-radius:14px;cursor:pointer;
}
.icon-btn:active{transform:scale(.96)}

/* ---------- view ---------- */
.view{animation:fade .18s ease-out}
@keyframes fade{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}

/* ---------- practice ---------- */
.now-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:18px;text-align:center;
}
.now-top{display:flex;justify-content:center;gap:8px;margin-bottom:6px}
.chip{
  font-size:.75rem;font-weight:600;letter-spacing:.02em;padding:5px 11px;border-radius:999px;
  background:var(--surface-2);color:var(--ink-2);max-width:60%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.chip.ghost{background:transparent;border:1px solid var(--line)}
.counter{font-size:3.4rem;font-weight:700;font-variant-numeric:tabular-nums;line-height:1.05;letter-spacing:-.02em}
.counter-sep{color:var(--ink-2);font-weight:400;margin:0 4px;font-size:2.2rem;vertical-align:.12em}
.word{
  margin:8px auto 2px;padding:12px 16px;border-radius:14px;background:var(--ok-bg);color:var(--ok);
  font-size:1.5rem;font-weight:700;max-width:100%;word-break:break-word;
}
.play-btn{
  width:100%;min-height:88px;margin:14px 0 10px;border:none;border-radius:18px;cursor:pointer;
  background:linear-gradient(180deg,var(--brand),var(--brand-2));color:#fff;
  display:flex;align-items:center;justify-content:center;gap:10px;
  font-size:1.15rem;font-weight:700;letter-spacing:.02em;
  box-shadow:0 10px 24px rgba(15,107,99,.28);
  transition:transform .12s ease,box-shadow .12s ease;
}
.play-btn svg{width:26px;height:26px}
.play-btn:active{transform:translateY(1px) scale(.995);box-shadow:0 6px 14px rgba(15,107,99,.24)}
.play-btn.playing{background:linear-gradient(180deg,var(--accent),#c97d2c);box-shadow:0 10px 24px rgba(224,145,58,.3)}
.sub-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.status{margin-top:12px;font-size:.86rem;color:var(--ink-2);min-height:20px}

.btn{
  border:1px solid transparent;border-radius:14px;min-height:44px;padding:10px 16px;
  font-size:.92rem;font-weight:600;font-family:inherit;cursor:pointer;
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  transition:transform .12s,background .15s,border-color .15s;
}
.btn:active{transform:scale(.98)}
.btn.primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(15,107,99,.22)}
.btn.ghost{background:var(--surface);border-color:var(--line);color:var(--ink)}
.btn.tiny{min-height:44px;padding:10px 15px;font-size:.84rem;background:var(--surface-2);color:var(--ink-2)}
.btn.danger-ghost{background:transparent;border-color:var(--line);color:var(--bad)}
.btn.small{min-height:40px;font-size:.85rem}
.btn:disabled{opacity:.45;cursor:default}

.mark-row{display:grid;grid-template-columns:1.35fr 1fr;gap:10px;margin:14px 0}
.mark{
  min-height:var(--tap);border-radius:16px;border:1px solid var(--line);background:var(--surface);
  display:flex;align-items:center;justify-content:center;gap:9px;cursor:pointer;
  font-family:inherit;font-size:1rem;font-weight:700;color:var(--ink);
  box-shadow:var(--shadow);transition:transform .12s;
}
.mark:active{transform:scale(.985)}
.mark b{font-size:1.35rem;line-height:1}
.mark.ok b{color:var(--ok)}
.mark.bad b{color:var(--bad)}
.mark.ok{background:var(--ok-bg);border-color:color-mix(in srgb,var(--ok) 30%,transparent)}
.mark.bad{background:var(--bad-bg);border-color:color-mix(in srgb,var(--bad) 25%,transparent)}
.mark:disabled{opacity:.4}
.mark.idle{opacity:.5}
.mark.idle:active{opacity:.75}

.progress-wrap{margin:4px 0 10px}
.dots{display:flex;gap:6px;justify-content:center;flex-wrap:wrap;min-height:10px}
.dot{width:9px;height:9px;border-radius:50%;background:color-mix(in srgb,var(--ink-2) 32%,transparent)}
.dot.ok{background:var(--ok)}
.dot.bad{background:var(--bad)}
.dot.now{outline:2px solid var(--brand);outline-offset:2px}
.bar{height:5px;border-radius:3px;background:var(--line);margin-top:12px;overflow:hidden}
.bar i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--brand),var(--accent));transition:width .3s ease}

.nav-row{display:flex;gap:8px;justify-content:space-between}
.nav-row .btn{flex:1}
.kbd-hint{margin:14px 2px 0;text-align:center;font-size:.75rem;color:var(--ink-2);display:none}
@media (hover:hover) and (pointer:fine){.kbd-hint{display:block}}
kbd{font-family:ui-monospace,monospace;font-size:.72rem;padding:1px 5px;border:1px solid var(--line);border-radius:5px;background:var(--surface);margin:0 2px}

/* ---------- cards / lists ---------- */
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:18px;margin-bottom:14px;
}
.card h2{font-size:1.05rem;margin-bottom:12px}
.list-picker{display:flex;gap:8px;margin-bottom:14px}
.list-picker select{flex:1}
.row-2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.field{display:block;margin-bottom:12px}
.field>span{display:block;font-size:.8rem;font-weight:600;color:var(--ink-2);margin-bottom:6px}
input[type=text],select,textarea{
  width:100%;font-family:inherit;font-size:.95rem;color:var(--ink);
  background:var(--surface-2);border:1px solid var(--line);border-radius:12px;padding:12px;
  min-height:46px;
}
textarea{resize:vertical;line-height:1.7}
input[type=text]:focus,select:focus,textarea:focus{outline:2px solid color-mix(in srgb,var(--brand) 45%,transparent);outline-offset:1px}
.hint-row{display:flex;justify-content:space-between;align-items:center;margin:-4px 0 14px}
.btn-row{display:flex;gap:10px;flex-wrap:wrap}
.btn-row.tight{gap:8px;margin:6px 0 14px}
.btn-row .btn{flex:1}
.link{background:none;border:none;color:var(--brand);font:inherit;font-size:.82rem;font-weight:600;cursor:pointer;text-decoration:underline;text-underline-offset:3px}
.muted{color:var(--ink-2)}
.small{font-size:.8rem}
.templates{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.tpl{
  text-align:left;padding:12px;border-radius:12px;border:1px solid var(--line);background:var(--surface-2);
  font-family:inherit;font-size:.85rem;color:var(--ink);cursor:pointer;line-height:1.35;
}
.tpl b{display:block;font-size:.92rem;margin-bottom:2px}
.tpl span{color:var(--ink-2);font-size:.76rem}

/* ---------- records ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:14px}
.stat{background:var(--surface-2);border-radius:12px;padding:12px;text-align:center}
.stat b{display:block;font-size:1.4rem;font-variant-numeric:tabular-nums}
.stat span{font-size:.72rem;color:var(--ink-2)}
.history{display:flex;flex-direction:column;gap:6px;max-height:300px;overflow:auto}
.hitem{display:flex;justify-content:space-between;gap:10px;font-size:.84rem;padding:9px 0;border-bottom:1px solid var(--line)}
.hitem:last-child{border-bottom:none}
.hitem time{color:var(--ink-2);font-size:.76rem}
.wrong-list{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:12px}
.wchip{
  padding:7px 11px;border-radius:9px;background:var(--bad-bg);color:var(--bad);
  font-size:.86rem;font-weight:600;border:1px solid color-mix(in srgb,var(--bad) 20%,transparent);
}
.empty{color:var(--ink-2);font-size:.86rem;padding:6px 0}

/* ---------- tabs ---------- */
.tabs{
  position:fixed;left:0;right:0;bottom:0;z-index:20;
  display:flex;background:color-mix(in srgb,var(--surface) 86%,transparent);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-top:1px solid var(--line);padding:6px 10px calc(6px + env(safe-area-inset-bottom));
}
.tabs button{
  flex:1;min-height:54px;border:none;background:none;color:var(--ink-2);font:inherit;font-size:.72rem;
  font-weight:600;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;cursor:pointer;border-radius:12px;
}
.tabs button.active{color:var(--brand)}
.tabs button.active svg{stroke-width:2.2}

/* ---------- sheets ---------- */
.sheet-backdrop{
  position:fixed;inset:0;background:rgba(12,20,24,.44);z-index:40;
  display:flex;align-items:flex-end;justify-content:center;
  animation:fade .16s ease-out;padding:0;
}
.sheet{
  width:100%;max-width:560px;max-height:88vh;overflow:auto;background:var(--surface);
  border-radius:22px 22px 0 0;padding:20px 20px calc(24px + env(safe-area-inset-bottom));
  box-shadow:var(--shadow-lg);animation:up .22s cubic-bezier(.2,.9,.25,1);
}
@keyframes up{from{transform:translateY(24px)}to{transform:none}}
.sheet-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.sheet h2{font-size:1.15rem}
.switch{display:flex;align-items:center;gap:10px;padding:11px 0;font-size:.9rem;border-top:1px solid var(--line);cursor:pointer}
.switch input{width:20px;height:20px;accent-color:var(--brand)}
input[type=range]{width:100%;accent-color:var(--brand);height:34px}
output{font-weight:700;color:var(--brand);float:right}
.summary{text-align:center}
.score{font-size:3rem;font-weight:700;line-height:1.1;margin:6px 0}
.score-sub{color:var(--ink-2);font-size:.9rem;margin-bottom:14px}
.summary .wrong-list{justify-content:center}
.btn-col{display:flex;flex-direction:column;gap:9px;margin-top:8px}

/* ---------- toast ---------- */
.toast{
  position:fixed;left:50%;bottom:calc(96px + env(safe-area-inset-bottom));transform:translate(-50%,14px);
  background:var(--ink);color:var(--bg);padding:11px 18px;border-radius:12px;font-size:.85rem;font-weight:600;
  opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:60;max-width:88vw;text-align:center;
}
.toast.on{opacity:1;transform:translate(-50%,0)}

@media (min-width:720px){
  .app{padding:0 24px}
  .brand h1{font-size:1.5rem}
  .counter{font-size:4rem}
  .mark-row{grid-template-columns:1fr 1fr}
  .sheet{border-radius:22px;margin-bottom:5vh}
  .sheet-backdrop{align-items:center}
  .kbd-hint{display:block}
}
@media (max-width:380px){
  .nav-row{flex-wrap:wrap}
  .nav-row #btnRestart{order:3;flex:0 0 100%}
  .mark-row{grid-template-columns:1fr 1fr}
  .counter{font-size:2.9rem}
  .play-btn{min-height:74px;font-size:1.05rem}
  .btn{padding:9px 12px;font-size:.88rem}
  .mark{font-size:.92rem}
  .templates{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
}