:root{
  --bg:#0f172a; --bg2:#1e293b; --card:#ffffff; --ink:#0f172a; --muted:#64748b;
  --line:#e2e8f0; --accent:#f59e0b; --accent2:#6366f1; --good:#10b981; --warn:#ef4444;
  --radius:16px; --shadow:0 6px 24px rgba(15,23,42,.08);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,"PingFang TC","Noto Sans TC","Helvetica Neue",sans-serif;
  color:var(--ink); background:#f1f5f9;
  -webkit-font-smoothing:antialiased; padding-bottom:env(safe-area-inset-bottom);
}
.hidden{display:none !important}
button{font-family:inherit;cursor:pointer}
h1,h2,h3{margin:0}
a{color:var(--accent2)}

/* ---------- 登入 ---------- */
.login{position:fixed;inset:0;background:linear-gradient(160deg,#0f172a,#312e81);
  display:flex;align-items:center;justify-content:center;z-index:50;padding:20px}
.login-card{background:#fff;border-radius:24px;padding:34px 28px;width:100%;max-width:340px;text-align:center;box-shadow:0 20px 60px rgba(0,0,0,.4)}
.login-emoji{font-size:46px}
.login-card h1{font-size:20px;margin:8px 0 2px}
.login-card p{color:var(--muted);margin:0 0 18px;font-size:14px}
.login-card input{width:100%;padding:13px 14px;border:1px solid var(--line);border-radius:12px;font-size:16px;margin-bottom:12px}
.login-card button{width:100%;padding:13px;border:0;border-radius:12px;background:var(--accent2);color:#fff;font-size:16px;font-weight:600}
.err{color:var(--warn);font-size:13px;margin-top:10px;min-height:18px}

/* ---------- 版面 ---------- */
.app{max-width:720px;margin:0 auto;min-height:100vh;display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;justify-content:space-between;padding:16px 18px 10px;position:sticky;top:0;background:#f1f5f9;z-index:10}
.brand{font-weight:700;font-size:17px}
.brand span{vertical-align:middle}
.biz-switch{display:flex;background:#e2e8f0;border-radius:999px;padding:3px}
.biz-switch button{border:0;background:transparent;padding:7px 14px;border-radius:999px;font-size:14px;font-weight:600;color:var(--muted)}
.biz-switch button.active{background:#fff;color:var(--ink);box-shadow:0 2px 6px rgba(0,0,0,.08)}

.tabs{display:flex;gap:6px;padding:0 14px 8px;position:sticky;top:52px;background:#f1f5f9;z-index:9}
.tabs button{flex:1;border:0;background:#fff;padding:11px 6px;border-radius:12px;font-size:14px;font-weight:600;color:var(--muted);box-shadow:var(--shadow)}
.tabs button.active{color:var(--ink);outline:2px solid var(--accent)}

main{flex:1;padding:8px 14px 30px}
.view{display:none;animation:fade .25s}
.view.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

.card{background:var(--card);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);margin-bottom:14px}
.card h2{font-size:16px;margin-bottom:12px}
.card h3{font-size:13px;color:var(--muted);margin-bottom:8px;font-weight:600}

/* ---------- 投幣口 ---------- */
.slot-wrap{display:flex;flex-direction:column;align-items:center;margin:14px 0 20px;position:relative}
.slot{width:150px;height:150px;border-radius:50%;
  background:radial-gradient(circle at 50% 35%,#fbbf24,#f59e0b 70%,#d97706);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  box-shadow:inset 0 -8px 18px rgba(0,0,0,.2),0 10px 30px rgba(245,158,11,.4);
  position:relative;transition:transform .15s}
.slot.bump{animation:bump .4s}
@keyframes bump{0%,100%{transform:scale(1)}30%{transform:scale(1.06)}60%{transform:scale(.97)}}
.slot-mouth{width:64px;height:10px;background:#78350f;border-radius:6px;box-shadow:inset 0 2px 4px rgba(0,0,0,.6);margin-bottom:10px}
.slot-label{color:#7c2d12;font-weight:700;font-size:15px}
.coin{position:absolute;width:34px;height:34px;border-radius:50%;
  background:radial-gradient(circle at 40% 35%,#fde68a,#f59e0b);border:2px solid #d97706;
  left:calc(50% - 17px);top:-40px;display:flex;align-items:center;justify-content:center;font-size:16px;z-index:2}
.coin.drop{animation:coindrop .55s cubic-bezier(.5,.05,.7,1) forwards}
@keyframes coindrop{0%{top:-40px;opacity:1;transform:rotate(0)}70%{opacity:1}100%{top:60px;opacity:0;transform:rotate(220deg) scale(.5)}}
.streak{margin-top:14px;font-weight:700;color:#b45309;font-size:15px;min-height:20px}

/* ---------- 表單 ---------- */
.field{display:block;margin-bottom:15px}
.field>span{display:block;font-size:13px;font-weight:600;margin-bottom:7px}
.field em{color:var(--muted);font-style:normal;font-weight:400}
.field input,.field textarea{width:100%;padding:12px;border:1px solid var(--line);border-radius:12px;font-size:16px;font-family:inherit}
.field textarea{resize:vertical}
.field.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{border:1px solid var(--line);background:#f8fafc;padding:8px 13px;border-radius:999px;font-size:14px;user-select:none}
.chip.on{background:var(--accent2);color:#fff;border-color:var(--accent2)}
.chip.type.on{background:var(--accent);border-color:var(--accent);color:#3b2100}
.file-btn{display:inline-block;background:#eef2ff;color:var(--accent2);padding:10px 14px;border-radius:12px;font-size:14px;font-weight:600}
.follow{font-size:14px;display:flex;align-items:center;gap:6px}
.file-list{display:flex;flex-wrap:wrap;gap:8px;margin:4px 0 8px}
.file-pill{background:#f1f5f9;border-radius:8px;padding:6px 10px;font-size:12px;display:flex;gap:6px;align-items:center}
.file-pill.up{opacity:.5}
.file-pill b{font-weight:600}
.drop-btn{width:100%;padding:16px;border:0;border-radius:14px;background:var(--accent);color:#3b2100;font-size:18px;font-weight:800;margin-top:6px;box-shadow:0 6px 16px rgba(245,158,11,.35)}
.drop-btn:disabled{opacity:.5}
.msg{text-align:center;font-size:14px;margin-top:10px;min-height:20px}
.msg.ok{color:var(--good);font-weight:600}
.msg.bad{color:var(--warn)}

/* ---------- 儀表板 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:14px}
.stat{background:#fff;border-radius:14px;padding:14px 8px;text-align:center;box-shadow:var(--shadow)}
.stat b{display:block;font-size:24px}
.stat span{font-size:11px;color:var(--muted)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.ranklist .row,.followlist .row{display:flex;justify-content:space-between;gap:8px;padding:9px 0;border-bottom:1px solid var(--line);font-size:14px;align-items:center}
.ranklist .row:last-child,.followlist .row:last-child{border-bottom:0}
.ranklist .n{font-weight:600}
.ranklist .meta{color:var(--muted);font-size:12px}
.pill{font-size:11px;padding:2px 8px;border-radius:999px;background:#f1f5f9;color:var(--muted)}
.pill.hot{background:#fef3c7;color:#b45309}
.pill.cold{background:#fee2e2;color:#b91c1c}
.bars{display:flex;flex-direction:column;gap:7px}
.bar-row{display:grid;grid-template-columns:96px 1fr 30px;align-items:center;gap:8px;font-size:12px}
.bar-track{background:#f1f5f9;border-radius:6px;height:16px;overflow:hidden}
.bar-fill{height:100%;background:linear-gradient(90deg,var(--accent2),#818cf8);border-radius:6px}
.trend-cols{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.followlist .row .s{flex:1}
.followlist .who{font-weight:600}
.followlist .dt{color:var(--muted);font-size:12px}
.empty{color:var(--muted);font-size:13px;padding:6px 0}

/* ---------- 查學員 ---------- */
.mhead{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;margin-bottom:6px}
.mhead h2{font-size:20px}
.minfo{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:8px}
.minfo .kv{background:#f1f5f9;border-radius:8px;padding:5px 10px;font-size:12px}
.minfo .kv b{color:var(--muted);font-weight:600;margin-right:4px}
.timeline{margin-top:6px}
.tl{border-left:3px solid var(--line);padding:0 0 16px 16px;position:relative}
.tl:before{content:"";position:absolute;left:-8px;top:2px;width:13px;height:13px;border-radius:50%;background:var(--accent2)}
.tl.q:before{background:var(--warn)} .tl.f:before{background:var(--good)}
.tl .d{font-size:12px;color:var(--muted)}
.tl .tp{font-size:12px;font-weight:700;margin-right:6px}
.tl .sm{margin:3px 0}
.tl .tg{display:flex;gap:5px;flex-wrap:wrap;margin-top:4px}
.tl .tg span{font-size:11px;background:#eef2ff;color:var(--accent2);padding:2px 8px;border-radius:999px}
.tl .att{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}
.tl .att a{display:block}
.tl .att img{max-width:120px;max-height:120px;border-radius:8px;border:1px solid var(--line)}
.tl .att .doc{font-size:12px;background:#f1f5f9;padding:6px 10px;border-radius:8px}
.flag{color:var(--warn);font-size:12px}

/* ---------- 批次匯入 ---------- */
.hint{color:var(--muted);font-size:13px;margin:0 0 14px}
.batch-sum{font-size:15px;margin-bottom:6px}
.batch-list{display:flex;flex-direction:column;gap:6px;margin-bottom:6px}
.brow{display:grid;grid-template-columns:1fr 20px minmax(120px,1.4fr);align-items:center;gap:8px;padding:7px 10px;border-radius:10px;font-size:14px}
.brow.ok{background:#ecfdf5}
.brow.no{background:#fef2f2}
.brow .arrow{color:var(--muted);text-align:center}
.brow select{padding:7px;border:1px solid var(--line);border-radius:8px;font-size:14px;font-family:inherit;width:100%}

.foot{text-align:center;color:var(--muted);font-size:12px;padding:16px}

@media(max-width:560px){
  .grid2,.trend-cols{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
}