/* base.css — 版面、header、按鈕、卡片、footer 等共用件 */
/* ---- clean layout ---- */
html,body{min-height:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}
button,input{font-family:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
::selection{background:var(--tint);color:var(--ink)}
*{box-sizing:border-box}

.app{max-width:860px;margin:0 auto;padding:20px 16px calc(28px + env(safe-area-inset-bottom,0px))}

/* header */
/* header: one tight row */
.top{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:16px}
.brand{display:flex;align-items:center;gap:10px;margin-right:auto}
.mark{width:42px;height:42px;flex-shrink:0;border:var(--bw) solid var(--rule-strong);border-radius:calc(var(--r-btn) - 2px);box-shadow:var(--shadow);background:var(--tint);color:var(--tint-deep);display:flex;flex-direction:column;align-items:center;justify-content:center;line-height:1.05}
.mark span:first-child{font-weight:800;font-size:.92rem}
.mark span:last-child{font-weight:800;font-size:.66rem}
h1{margin:0;font-size:1.25rem;font-weight:800;letter-spacing:.01em;line-height:1.15}
h1 em{font-style:normal;color:var(--accent)}
.star-total{margin:2px 0 0;font-size:.72rem;font-weight:700;color:var(--ink-faint)}
.top-mid{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.star-count{margin:0;font-size:.78rem;font-weight:800;color:var(--ink-soft);white-space:nowrap}

/* theme dots inline in header */
.theme-switcher{display:flex;gap:6px;align-items:center}
.theme-switcher.foot-theme{justify-content:center;margin:16px 0 0}
.theme-dot{width:22px;height:22px;border-radius:var(--r-pill);border:var(--bw) solid var(--rule-strong);background:linear-gradient(135deg,var(--dot-bg) 50%,var(--dot-accent) 50%);flex-shrink:0}
.theme-dot:hover{transform:scale(1.14)}
.theme-dot.active{outline:2px solid var(--ink);outline-offset:2px}
.theme-dot[data-theme="classic"]{--dot-bg:#f7f5f0;--dot-accent:#e3a899}
.theme-dot[data-theme="pop"]{--dot-bg:#faf3ec;--dot-accent:#ff5c39}
.theme-dot[data-theme="french"]{--dot-bg:#f3ede1;--dot-accent:#a05a4a}
.theme-dot[data-theme="jp"]{--dot-bg:#fbfbfa;--dot-accent:#2f4f3e}
.theme-dot[data-theme="hk"]{--dot-bg:#f2f3f5;--dot-accent:#1e4b8f}
.theme-dot[data-theme="crisp"]{--dot-bg:#f7f7f8;--dot-accent:#e11d48}
.theme-dot[data-theme="night"]{--dot-bg:#211c33;--dot-accent:#ff7d5e}
.theme-dot[data-theme="neon"]{--dot-bg:#0d0b1a;--dot-accent:#7c3aed}

/* mode + progress: one compact bar */
.ctrlbar{display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap;margin-bottom:14px}
.seg{display:inline-flex;background:var(--card);border:var(--bw) solid var(--rule-strong);border-radius:var(--r-btn);overflow:hidden;box-shadow:var(--shadow)}
.seg button{border:none;background:transparent;color:var(--ink-soft);font-weight:800;font-size:.88rem;padding:9px 14px;min-height:40px}
.seg button[aria-pressed="true"]{background:var(--accent);color:var(--on-accent)}
.seg button+button{border-left:1px solid var(--rule)}
.toggle{min-height:36px;padding:6px 12px;border-radius:var(--r-pill);border:1px solid var(--rule-strong);background:var(--card);color:var(--ink-faint);font-weight:700;font-size:.78rem}
.toggle[aria-pressed="true"]{background:var(--tint);color:var(--tint-deep);border-color:var(--tint-deep)}

/* study + quiz card */
.card{background:var(--card);border:var(--bw) solid var(--rule-strong);border-radius:var(--r-card);box-shadow:var(--shadow-soft);padding:18px 18px 16px}
.rule{margin:0 0 14px;padding:10px 14px;background:var(--eca-bg);color:var(--eca-fg);border-radius:calc(var(--r-card) - 4px);font-weight:700;font-size:.88rem;line-height:1.55}
.rule::before{content:"📌";margin-right:6px}
.panel-title{margin:0 0 6px;font-size:1.05rem;font-weight:800}
.hint{margin:0 0 12px;color:var(--ink-soft);font-size:.84rem}


.icon-btn{width:34px;height:34px;flex-shrink:0;border-radius:999px;border:1px solid var(--rule);background:transparent;color:var(--ink-faint);display:inline-flex;align-items:center;justify-content:center}
.icon-btn:hover{background:var(--tint);color:var(--tint-deep);border-color:var(--tint-deep)}

.actions{display:flex;gap:8px;margin-top:14px}
.btn-primary,.btn-secondary{flex:1;min-height:46px;border-radius:var(--r-btn);font-weight:800;font-size:.95rem;padding:10px 14px}
.btn-primary{background:var(--accent);color:var(--on-accent);border:var(--bw) solid var(--accent);box-shadow:var(--shadow)}
.btn-primary:hover{background:var(--accent-hover)}
.btn-secondary{background:var(--card);color:var(--ink);border:var(--bw) solid var(--rule-strong)}
.btn-secondary:hover{background:var(--tint);color:var(--tint-deep)}

/* footer bits */
.foot{margin:16px 0 0;text-align:center;color:var(--ink-faint);font-size:.72rem;line-height:1.5}
.voice-note{margin:12px 0 0;text-align:center;color:var(--ink-faint);font-size:.72rem}
.voice-note strong{color:var(--ink-soft)}
.roadmap-row{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin-top:12px}
.chip{min-height:32px;padding:4px 10px;border-radius:var(--r-pill);border:1px dashed var(--rule-strong);background:transparent;color:var(--ink-faint);font-weight:700;font-size:.74rem;display:inline-flex;align-items:center;gap:4px}
.roadmap-note{margin:8px 0 0;font-size:.76rem;font-weight:600;color:var(--ink-soft);text-align:center}

@keyframes rise{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.card{animation:rise .25s ease}
@media (prefers-reduced-motion:reduce){.card,.choice.is-wrong{animation:none}.theme-dot,.choice,.btn-primary,.seg button,.lm-dot{transition:none}}
html[data-theme="pop"] .btn-primary,html[data-theme="night"] .btn-primary,html[data-theme="pop"] .seg button[aria-pressed="true"],html[data-theme="night"] .seg button[aria-pressed="true"]{border-color:var(--ink)}
html[data-theme="neon"] .btn-primary,html[data-theme="neon"] .seg button[aria-pressed="true"],html[data-theme="neon"] .meter>span{background:linear-gradient(135deg,#7c3aed,#4c1d95);color:var(--on-accent);border-color:transparent}
html[data-theme="classic"] .btn-primary,html[data-theme="classic"] .seg button[aria-pressed="true"]{background:var(--accent-deep);border-color:var(--accent-deep)}

@media (max-width:560px){
  .top{gap:8px}
  h1{font-size:1.1rem}
}
@media (max-width:420px){.actions{flex-direction:column}}