/* 競賽作戰台 · 視覺（Apple / Google / Edge 風格：中性、留白、細線、單一強調色） */
:root{
  --bg:#f5f5f7;
  --bg-soft:#fbfbfd;
  --surface:#ffffff;
  --surface-2:#fafafa;
  --ink:#1d1d1f;
  --sub:#6e6e73;
  --faint:#8e8e93;
  --line:rgba(0,0,0,.09);
  --line-2:rgba(0,0,0,.16);
  --soft:rgba(0,0,0,.045);
  --accent:#0071e3;
  --accent-soft:rgba(0,113,227,.10);
  --ok:#1d8f4e;
  --bad:#d70015;
  --warn:#b25000;
  --radius:18px;
  --shadow:0 1px 2px rgba(0,0,0,.04), 0 4px 16px rgba(0,0,0,.05);
  --shadow-lg:0 12px 40px rgba(0,0,0,.12);
}
html[data-theme="dark"]{
  --bg:#000000;
  --bg-soft:#0a0a0a;
  --surface:#1c1c1e;
  --surface-2:#242426;
  --ink:#f5f5f7;
  --sub:#a1a1a6;
  --faint:#7c7c80;
  --line:rgba(255,255,255,.11);
  --line-2:rgba(255,255,255,.22);
  --soft:rgba(255,255,255,.06);
  --accent:#0a84ff;
  --accent-soft:rgba(10,132,255,.16);
  --ok:#30d158;
  --bad:#ff453a;
  --warn:#ff9f0a;
  --shadow:0 1px 2px rgba(0,0,0,.5);
  --shadow-lg:0 20px 60px rgba(0,0,0,.6);
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%}
body{
  background:var(--bg);
  color:var(--ink);
  font:15px/1.55 -apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI Variable Text","Segoe UI","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  -webkit-font-smoothing:antialiased;
  letter-spacing:-.003em;
}
html[data-theme="light"] body{
  background:
    radial-gradient(1200px 600px at 50% -240px, rgba(0,113,227,.055), transparent 70%),
    var(--bg);
}
button,input,select,textarea{font:inherit;color:inherit}
a{color:var(--accent);text-decoration:none}
[hidden]{display:none !important}

/* ---------- 登入 ---------- */
.login-wrap{min-height:100dvh;display:grid;place-items:center;padding:24px}
.login-card{
  width:min(420px,100%);background:var(--surface);border:1px solid var(--line);
  border-radius:24px;padding:40px 34px;box-shadow:var(--shadow-lg);
}
.brand-lg{font-size:26px;font-weight:600;letter-spacing:-.02em;display:flex;align-items:center;gap:10px}
.brand-lg .mark,.brand .mark{font-size:19px;line-height:1}
.login-sub{color:var(--sub);font-size:14px;margin:10px 0 28px;line-height:1.5}
.login-card label{display:block;font-size:12.5px;color:var(--sub);font-weight:500;margin-bottom:16px}
.login-card input{
  display:block;width:100%;margin-top:7px;padding:12px 14px;border-radius:12px;
  border:1px solid var(--line-2);background:var(--surface);font-size:15px;outline:none;transition:.15s;
}
.login-card input:focus{border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}
.login-err{color:var(--bad);font-size:13px;min-height:20px;margin-bottom:8px}
.login-foot{color:var(--faint);font-size:12px;margin:22px 0 0;text-align:center;line-height:1.6}

/* ---------- 版面 ---------- */
.topbar{
  position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:18px;
  padding:0 24px;height:56px;
  background:color-mix(in srgb, var(--surface) 78%, transparent);
  backdrop-filter:blur(22px) saturate(180%);
  border-bottom:1px solid var(--line);
}
.brand{font-weight:600;font-size:14.5px;letter-spacing:-.01em;display:flex;align-items:center;gap:9px;white-space:nowrap}
.brand .mark{display:grid;place-items:center;width:22px;height:22px;border-radius:6px;background:var(--ink);
  color:var(--bg);font-size:11.5px;font-weight:700;flex:none}
.brand-lg .mark{display:grid;place-items:center;width:30px;height:30px;border-radius:9px;background:var(--ink);
  color:var(--bg);font-size:14px;font-weight:700;flex:none}
.tabs{display:inline-flex;gap:2px;background:var(--soft);border-radius:11px;padding:3px;margin:0 auto}
.tabs button{border:0;background:transparent;color:var(--sub);font-size:13px;font-weight:500;padding:6px 16px;
  border-radius:8px;cursor:pointer;transition:.15s;white-space:nowrap}
.tabs button:hover{color:var(--ink)}
.tabs button.on{background:var(--surface);color:var(--ink);box-shadow:0 1px 2px rgba(0,0,0,.10);font-weight:600}
.top-right{display:flex;align-items:center;gap:10px}
.icon-btn{border:1px solid var(--line);background:transparent;width:32px;height:32px;border-radius:9px;cursor:pointer;
  font-size:14px;line-height:1;color:var(--sub);transition:.15s}
.icon-btn:hover{color:var(--ink);border-color:var(--line-2)}
.user{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:500;color:var(--sub);cursor:pointer}
.avatar{width:26px;height:26px;border-radius:50%;display:grid;place-items:center;color:#fff;font-size:11px;font-weight:600;
  background:linear-gradient(180deg,#3a3a3c,#1d1d1f)}
html[data-theme="dark"] .avatar{background:linear-gradient(180deg,#636366,#3a3a3c)}
main{max-width:1080px;margin:0 auto;padding:36px 24px 80px}
.view{animation:fade .25s cubic-bezier(.2,.7,.3,1)}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* ---------- 通用 ---------- */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.h1{font-size:30px;font-weight:600;letter-spacing:-.022em;margin:0 0 6px;line-height:1.2}
.h2{font-size:15px;font-weight:600;margin:0 0 14px;display:flex;align-items:center;gap:8px;letter-spacing:-.01em}
.sub{color:var(--sub);font-size:14px;margin:0}
.btn{border:1px solid var(--line-2);background:var(--surface);color:var(--ink);padding:8px 15px;border-radius:10px;
  font-size:13px;font-weight:500;cursor:pointer;transition:.15s;display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.btn:hover{background:var(--soft)}
.btn.primary{background:var(--accent);border-color:transparent;color:#fff;font-weight:500}
.btn.primary:hover{filter:brightness(1.08)}
.btn.ghost{background:transparent;border-color:transparent;color:var(--sub)}
.btn.ghost:hover{background:var(--soft);color:var(--ink)}
.btn.sm{padding:5px 11px;font-size:12px;border-radius:8px}
.btn.danger:hover{border-color:var(--bad);color:var(--bad);background:transparent}
.btn.block{width:100%;justify-content:center;padding:12px;border-radius:12px;font-size:14px}
.row{display:flex;align-items:center;gap:10px}
.spread{display:flex;align-items:center;justify-content:space-between;gap:16px}
.pill{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;font-weight:500;padding:2px 9px;border-radius:6px;
  background:var(--soft);color:var(--sub);white-space:nowrap}
.pill.hard{background:rgba(215,0,21,.10);color:var(--bad)}
html[data-theme="dark"] .pill.hard{background:rgba(255,69,58,.16)}
.pill.done{background:rgba(29,143,78,.10);color:var(--ok)}
.dot{width:7px;height:7px;border-radius:50%;display:inline-block;flex:none}
.mono{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

/* ---------- 總覽 ---------- */
.hero{display:grid;grid-template-columns:1.28fr 1fr;gap:16px;margin-bottom:16px}
.hero-main{position:relative;overflow:hidden;background:#1d1d1f;color:#fff;border:0;padding:28px 30px;
  display:flex;flex-direction:column;justify-content:center}
html[data-theme="dark"] .hero-main{background:var(--surface-2)}
.hero-main::after{content:"";position:absolute;right:-80px;top:-80px;width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle, rgba(255,255,255,.10), transparent 70%)}
.hero-main .label{font-size:12px;opacity:.62;letter-spacing:.03em;font-weight:500;text-transform:none}
.hero-main .big{font-size:54px;font-weight:600;line-height:1.08;margin:8px 0 4px;letter-spacing:-.03em}
.hero-main .ev{font-size:14.5px;opacity:.92;line-height:1.45;max-width:92%}
.hero-main .when{font-size:12.5px;opacity:.55;margin-top:10px}
.hero-side{display:grid;grid-template-rows:1fr 1fr;gap:16px}
.stat{display:flex;flex-direction:column;justify-content:center;padding:20px 24px}
.stat .n{font-size:32px;font-weight:600;letter-spacing:-.03em;line-height:1.1}
.stat .l{font-size:12.5px;color:var(--sub);margin-top:6px;line-height:1.4}
.comp-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:16px}
.comp-card{position:relative;cursor:pointer;transition:.18s;padding:18px 18px 16px}
.comp-card:hover{border-color:var(--line-2);box-shadow:var(--shadow);transform:translateY(-1px)}
.comp-card .bar{display:none}
.comp-card .nm{font-weight:600;font-size:15px;display:flex;align-items:center;gap:8px;letter-spacing:-.01em}
.comp-card .sb{font-size:12px;color:var(--faint);margin-top:2px}
.comp-card .next{font-size:12.5px;color:var(--sub);margin-top:14px;min-height:42px;line-height:1.5}
.comp-card .meta{display:flex;gap:14px;font-size:11.5px;color:var(--faint);margin-top:10px;
  border-top:1px solid var(--line);padding-top:10px}
.two-col{display:grid;grid-template-columns:1.1fr .9fr;gap:16px}
.list{display:flex;flex-direction:column}
.li{display:flex;align-items:center;gap:12px;padding:11px 10px;border-radius:10px;transition:.12s;cursor:default}
.li:hover{background:var(--soft)}
.li .nm{font-size:13.5px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.li .mt{font-size:11.5px;color:var(--faint);margin-top:2px}
.empty{color:var(--faint);font-size:13px;text-align:center;padding:34px 8px}

/* ---------- 檔案庫 ---------- */
.chips{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 14px}
.chip{border:1px solid var(--line);background:transparent;padding:6px 14px;border-radius:980px;font-size:12.5px;
  font-weight:500;color:var(--sub);cursor:pointer;transition:.15s;display:flex;align-items:center;gap:7px}
.chip:hover{background:var(--soft);color:var(--ink)}
.chip.on{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.chip .cnt{font-size:10.5px;opacity:.55;font-variant-numeric:tabular-nums}
.chip.on .cnt{opacity:.75}
.chips.sub{margin-top:-8px}
.chips.sub .chip{font-size:11.5px;padding:4px 11px}
.list-meta{font-size:11.5px;color:var(--faint);margin:0 0 12px 2px}
.tag{background:var(--soft);color:var(--sub);font-size:10.5px;font-weight:500;padding:1px 7px;border-radius:5px;
  max-width:260px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* 搜尋 + 開關 */
.search{border:1px solid var(--line-2);background:var(--surface);border-radius:10px;padding:8px 13px;font-size:13px;
  outline:none;width:220px;transition:.15s}
.search::placeholder{color:var(--faint)}
.search:focus{border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}
.switch{display:inline-flex;align-items:center;gap:8px;cursor:pointer;user-select:none;font-size:12.5px;
  color:var(--sub);font-weight:500;white-space:nowrap}
.switch input{display:none}
.switch .track{width:36px;height:21px;border-radius:99px;background:var(--line-2);position:relative;
  transition:.2s;flex:none}
.switch .knob{position:absolute;top:2px;left:2px;width:17px;height:17px;border-radius:50%;background:#fff;
  box-shadow:0 1px 3px rgba(0,0,0,.28);transition:.2s}
.switch input:checked + .track{background:var(--accent)}
.switch input:checked + .track .knob{transform:translateX(15px)}

/* 麵包屑 */
.crumbs{display:flex;align-items:center;gap:2px;flex-wrap:wrap;margin:0 0 14px;font-size:12.5px}
.crumbs button{border:0;background:transparent;padding:3px 8px;border-radius:7px;color:var(--sub);font-weight:500;
  cursor:pointer;transition:.12s}
.crumbs button:hover{background:var(--soft);color:var(--ink)}
.crumbs .cur{font-weight:600;color:var(--ink);padding:3px 8px}
.crumbs .sep{color:var(--faint);font-size:11px;opacity:.7}

/* 上傳 */
.drop{border:1.5px dashed var(--line-2);border-radius:16px;padding:24px;text-align:center;margin-bottom:16px;
  transition:.18s;background:transparent}
.drop:hover{border-color:var(--accent);background:var(--accent-soft)}
.drop.hot{border-color:var(--accent);background:var(--accent-soft)}
.drop .big{font-size:14px;font-weight:500;margin-bottom:4px}
.drop .sm{font-size:12px;color:var(--faint)}
.drop.hint{cursor:default;border-style:dashed;opacity:.65}
.drop.hint:hover{border-color:var(--line-2);background:transparent}
.progress{height:3px;border-radius:99px;background:var(--soft);overflow:hidden;margin-top:12px}
.progress > i{display:block;height:100%;width:0;background:var(--accent);transition:width .2s}

/* 資料夾 / 檔案 */
.folders{display:flex;flex-direction:column;gap:1px;background:var(--line);border:1px solid var(--line);
  border-radius:14px;overflow:hidden;margin-bottom:14px}
.folder{display:flex;align-items:center;gap:14px;padding:13px 16px;background:var(--surface);cursor:pointer;transition:.12s}
.folder:hover{background:var(--surface-2)}
.folder .ficon{background:transparent;color:var(--faint);font-size:17px;width:24px;height:24px;border-radius:0}
.folder:hover .ficon{color:var(--sub)}
.folder .fname{font-weight:500;font-size:13.5px}
.folder .chev{color:var(--faint);font-size:17px;line-height:1;padding-right:2px}
.files{display:flex;flex-direction:column;gap:1px;background:var(--line);border:1px solid var(--line);
  border-radius:14px;overflow:hidden}
.file{display:flex;align-items:center;gap:14px;padding:13px 16px;background:var(--surface);transition:.12s}
.file:hover{background:var(--surface-2)}
.ficon{width:34px;height:34px;border-radius:8px;display:grid;place-items:center;font-size:10px;font-weight:600;
  background:var(--soft);color:var(--sub);flex:none;letter-spacing:.02em}
.fmain{flex:1;min-width:0}
.fname{font-size:13.5px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;letter-spacing:-.005em}
.fmeta{font-size:11.5px;color:var(--faint);margin-top:3px;display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.facts{display:flex;gap:6px;flex:none}

/* ---------- 任務 ---------- */
.board{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;align-items:start}
.col{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:16px;min-height:140px}
.col h3{margin:0 0 12px;font-size:12px;font-weight:600;display:flex;align-items:center;gap:8px;color:var(--sub);
  letter-spacing:.02em}
.col h3 .cnt{margin-left:auto;font-size:11px;background:var(--soft);padding:1px 8px;border-radius:99px;font-weight:600}
.task{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin-bottom:8px;transition:.15s}
.task:hover{border-color:var(--line-2);box-shadow:var(--shadow)}
.task .t{font-size:13.5px;font-weight:500;line-height:1.45}
.task .m{font-size:11.5px;color:var(--faint);margin-top:6px;display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.task .acts{display:flex;gap:5px;margin-top:10px;opacity:0;transition:.15s}
.task:hover .acts{opacity:1}
.task.done .t{text-decoration:line-through;color:var(--faint)}
.task-form{display:grid;grid-template-columns:1.4fr .85fr .85fr .85fr auto;gap:8px;margin-bottom:16px}
.task-form input,.task-form select{padding:9px 12px;border-radius:10px;border:1px solid var(--line-2);
  background:var(--surface);font-size:13px;outline:none;transition:.15s}
.task-form input:focus,.task-form select:focus{border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}

/* ---------- 日曆 ---------- */
.cal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.cal-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:14px;overflow:hidden}
.cal-dow{text-align:center;font-size:11px;font-weight:600;color:var(--faint);padding:10px 0;background:var(--surface-2);
  letter-spacing:.04em}
.day{min-height:86px;padding:8px 9px;background:var(--surface);transition:.12s}
.day.out{background:var(--surface-2);opacity:.6}
.day.today{background:var(--accent-soft);box-shadow:inset 0 0 0 1.5px var(--accent)}
.day .d{font-size:11.5px;font-weight:600;color:var(--sub)}
.day.today .d{color:var(--accent)}
.day .e{font-size:10.5px;line-height:1.35;margin-top:4px;padding:2px 5px;border-radius:4px;
  background:var(--soft);color:var(--sub);font-weight:500;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;
  -webkit-box-orient:vertical;border-left:2px solid var(--c,var(--faint))}
.day .e.hard{background:rgba(215,0,21,.09);color:var(--bad);border-left-color:var(--bad)}
html[data-theme="dark"] .day .e.hard{background:rgba(255,69,58,.14)}
.agenda{margin-top:4px;display:flex;flex-direction:column}
.ag{display:flex;gap:16px;padding:12px 8px;align-items:flex-start;border-bottom:1px solid var(--line)}
.ag:last-child{border-bottom:0}
.ag .dt{width:60px;flex:none;font-size:12px;font-weight:600;color:var(--sub);font-variant-numeric:tabular-nums}
.ag .bd{flex:1;min-width:0}
.ag .tt{font-size:13.5px;font-weight:500;line-height:1.4}

/* ---------- 練題 ---------- */
.quiz-card{text-align:center;padding:52px 24px}
.quiz-card .qz{font-size:40px;margin-bottom:14px;opacity:.9}

/* ---------- 彈窗 / Toast ---------- */
.modal-mask{position:fixed;inset:0;background:rgba(0,0,0,.5);backdrop-filter:blur(8px);z-index:60;
  display:grid;place-items:center;padding:20px}
.modal{background:var(--surface);border-radius:18px;box-shadow:var(--shadow-lg);width:min(1000px,100%);
  max-height:88dvh;display:flex;flex-direction:column;overflow:hidden;border:1px solid var(--line)}
.modal-head{display:flex;align-items:center;gap:12px;padding:14px 18px;border-bottom:1px solid var(--line)}
.modal-head .nm{font-weight:500;font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1}
.modal-body{flex:1;overflow:auto;background:var(--surface-2)}
.modal-body iframe{width:100%;height:74dvh;border:0;background:#fff}
.pdfobj{width:100%;height:74dvh;border:0;background:#fff;display:block}
.pdfFallback{padding:52px 24px;text-align:center;color:var(--sub);font-size:14px;background:var(--surface);height:100%}
.modal-body img{display:block;max-width:100%;margin:0 auto}
.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%);background:#1d1d1f;color:#fff;
  padding:11px 20px;border-radius:12px;font-size:13px;font-weight:500;z-index:90;box-shadow:var(--shadow-lg)}
html[data-theme="dark"] .toast{background:#f5f5f7;color:#000}

/* ---------- 響應式 ---------- */
@media(hover:none){
  .task .acts{opacity:1}
}
@media(max-width:900px){
  .hero,.two-col{grid-template-columns:1fr}
  .hero-side{grid-template-rows:auto}
  .search{width:100%}
  .comp-grid{grid-template-columns:repeat(2,1fr)}
  .board{grid-template-columns:1fr}
  .task-form{grid-template-columns:1fr 1fr}
  .topbar{height:auto;padding:10px 14px;flex-wrap:wrap;gap:10px}
  .tabs{order:3;width:100%;justify-content:space-between;margin:0}
  .tabs button{flex:1;padding:7px 4px;font-size:12.5px;text-align:center}
  main{padding:22px 16px 64px}
  .h1{font-size:24px}
  .hero-main .big{font-size:42px}
  .hero-main{padding:24px}
  .day{min-height:66px;padding:6px}
  .day .e{font-size:10px}
}
@media(max-width:560px){
  .comp-grid{grid-template-columns:1fr}
  .file,.folder{padding:11px 12px;gap:10px}
  .fmeta{font-size:11px}
  .facts .btn{padding:4px 9px}
  .spread{flex-wrap:wrap}
}


/* ============================================================
   v3：環境漸層、檔案類型色、頁面轉場
   ============================================================ */

/* 1. 頂部環境光（很淡的三色，讓白底不平） */
body::before{
  content:"";position:fixed;left:0;right:0;top:0;height:600px;pointer-events:none;z-index:0;
  background:
    radial-gradient(700px 340px at 10% -8%, rgba(0,113,227,.16), transparent 70%),
    radial-gradient(560px 320px at 58% -14%, rgba(122,90,255,.13), transparent 72%),
    radial-gradient(640px 340px at 98% -6%, rgba(0,172,150,.12), transparent 70%);
  opacity:.95;
}
html[data-theme="dark"] body::before{opacity:.5}
main{position:relative;z-index:1}

/* 2. 檔案類型色（Finder / Google Drive 那種淡底＋同色字） */
.ficon{--tc:#8e8e93;background:color-mix(in srgb,var(--tc) 12%,transparent);color:var(--tc)}
html[data-theme="dark"] .ficon{
  background:color-mix(in srgb,var(--tc) 22%,transparent);
  color:color-mix(in srgb,var(--tc) 75%,#ffffff);
}
.ficon.t-pdf{--tc:#d6453d}
.ficon.t-doc{--tc:#2f6fbf}
.ficon.t-xls{--tc:#1d8f4e}
.ficon.t-ppt{--tc:#c1660f}
.ficon.t-img{--tc:#7b5cff}
.ficon.t-zip{--tc:#9a7420}
.ficon.t-code{--tc:#67718a}
.ficon.t-file{--tc:#8e8e93}

/* 3. 卡片與主視覺加一點色彩 */
.comp-card{
  background:
    radial-gradient(220px 120px at 100% 0%, color-mix(in srgb,var(--c) 15%, transparent), transparent 72%),
    var(--surface);
}
.hero-main{
  background:linear-gradient(135deg,#16161a 0%,#221d33 52%,#14222e 100%);
}
html[data-theme="dark"] .hero-main{
  background:linear-gradient(135deg,#1b1b1e 0%,#241f38 58%,#152230 100%);
}
.btn.primary{background:linear-gradient(180deg,#0a84ff 0%,#0071e3 100%);border-color:transparent}
.btn.primary:hover{filter:brightness(1.06)}
.chip.on{background:linear-gradient(180deg,#3a3a3c,#1d1d1f);border-color:#1d1d1f}
html[data-theme="dark"] .chip.on{background:linear-gradient(180deg,#f5f5f7,#e8e8ed);color:#000}

/* 4. 頁面／列表轉場 */
.view{animation:viewIn .34s cubic-bezier(.22,.61,.36,1) both}
@keyframes viewIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
::view-transition-old(root){animation:vtOut .18s ease both}
::view-transition-new(root){animation:vtIn .3s cubic-bezier(.22,.61,.36,1) both}
@keyframes vtOut{to{opacity:0;transform:translateY(-8px) scale(.996)}}
@keyframes vtIn{from{opacity:0;transform:translateY(10px) scale(.996)}to{opacity:1;transform:none}}

.files>.file,.folders>.folder{animation:rowIn .3s cubic-bezier(.22,.61,.36,1) both}
.files>.file:nth-child(1),.folders>.folder:nth-child(1){animation-delay:.01s}
.files>.file:nth-child(2),.folders>.folder:nth-child(2){animation-delay:.035s}
.files>.file:nth-child(3),.folders>.folder:nth-child(3){animation-delay:.06s}
.files>.file:nth-child(4),.folders>.folder:nth-child(4){animation-delay:.085s}
.files>.file:nth-child(5),.folders>.folder:nth-child(5){animation-delay:.11s}
.files>.file:nth-child(6),.folders>.folder:nth-child(6){animation-delay:.135s}
.files>.file:nth-child(7),.folders>.folder:nth-child(7){animation-delay:.16s}
.files>.file:nth-child(8),.folders>.folder:nth-child(8){animation-delay:.185s}
.files>.file:nth-child(n+9),.folders>.folder:nth-child(n+9){animation-delay:.2s}
@keyframes rowIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

/* 5. 尊重系統的減少動態設定 */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-delay:0ms !important;transition-duration:.001ms !important}
}

.files.searching>.file,.folders.searching>.folder{animation:none !important}


/* ============================================================
   v4：帳號管理、個人行程
   ============================================================ */
.role-tag{font-size:10px;font-weight:600;padding:1px 6px;border-radius:5px;background:var(--soft);color:var(--sub);flex:none}
.role-tag.captain{background:var(--accent-soft);color:var(--accent)}
.role-tag.admin{background:rgba(122,90,255,.14);color:#6b4bff}
html[data-theme="dark"] .role-tag.admin{background:rgba(122,90,255,.22);color:#b9a6ff}

/* 日曆上的個人行程 */
.day .p{font-size:10.5px;line-height:1.35;margin-top:4px;padding:2px 5px;border-radius:4px;
  background:var(--soft);color:var(--sub);overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;
  -webkit-box-orient:vertical;border-left:2px solid var(--faint)}
.day .p.mine{background:var(--accent-soft);color:var(--accent);border-left-color:var(--accent)}
.day .p b{font-weight:700}

/* 表單 */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:6px;font-size:12px;color:var(--sub);font-weight:500}
.field.full{grid-column:1/-1}
.field input,.field select{padding:10px 12px;border:1px solid var(--line-2);border-radius:10px;background:var(--surface);
  font-size:14px;color:var(--ink);outline:none;transition:.15s;font-weight:400}
.field input:focus,.field select:focus{border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}
.checkline{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--sub);margin-top:16px;cursor:pointer}
.checkline input{width:16px;height:16px;accent-color:var(--accent)}

/* 帳號管理 */
.admin-table{width:100%;border-collapse:collapse;font-size:13px}
.admin-table th{text-align:left;font-size:11px;color:var(--faint);font-weight:600;padding:12px 16px;
  border-bottom:1px solid var(--line);background:var(--surface-2);letter-spacing:.03em}
.admin-table td{padding:12px 16px;border-bottom:1px solid var(--line)}
.admin-table tr:last-child td{border-bottom:0}
.admin-table tr:hover td{background:var(--surface-2)}
.chk-grid{display:flex;flex-wrap:wrap;gap:10px}
.chk{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--sub);cursor:pointer;
  border:1px solid var(--line);border-radius:10px;padding:8px 13px;transition:.15s}
.chk input{accent-color:var(--accent)}
.chk:has(input:checked){border-color:var(--accent);background:var(--accent-soft);color:var(--ink)}

@media(max-width:900px){
  .form-grid{grid-template-columns:1fr}
  .admin-table th:nth-child(4),.admin-table td:nth-child(4){display:none}
}


/* ============================================================
   v5：作業／評分／排行
   ============================================================ */
.work-card{padding:18px 20px;margin-bottom:14px}
.wc-title{font-size:16px;font-weight:600;letter-spacing:-.01em;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.wc-meta{font-size:12px;color:var(--faint);margin-top:5px}
.wc-detail{font-size:13px;color:var(--sub);margin-top:12px;line-height:1.6;white-space:pre-wrap}
.wc-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px;
  padding-top:12px;border-top:1px solid var(--line);flex-wrap:wrap}
.wc-stats{font-size:12px;color:var(--sub)}
.leave-box{margin-top:12px;padding:12px 14px;border-radius:10px;background:rgba(194,102,15,.07);
  border:1px solid rgba(194,102,15,.18)}
html[data-theme="dark"] .leave-box{background:rgba(255,159,10,.1);border-color:rgba(255,159,10,.25)}

.rank-head{display:flex;align-items:center;gap:8px;padding:14px 18px;font-size:13px;font-weight:600;
  border-bottom:1px solid var(--line);background:var(--surface-2)}
.rank-table td{padding:10px 16px}
.rank-table .rank-no{color:var(--faint);width:36px}
.rank-me td{background:var(--accent-soft)}
.rank-me td:first-child{box-shadow:inset 2px 0 0 var(--accent)}

.grade-row{border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin-bottom:12px}
.grade-text{font-size:12.5px;color:var(--sub);background:var(--soft);border-radius:8px;padding:8px 10px;
  max-height:90px;overflow:auto;white-space:pre-wrap}
.score-input{width:92px;padding:8px 10px;border:1px solid var(--line-2);border-radius:9px;background:var(--surface);font-size:13px}
.feedback-input{flex:1;min-width:180px;padding:8px 10px;border:1px solid var(--line-2);border-radius:9px;
  background:var(--surface);font-size:13px}
.score-input:focus,.feedback-input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.notice{margin-top:14px;font-size:12.5px;color:var(--sub);background:var(--soft);border-radius:10px;padding:10px 12px}
.notice.warn{background:rgba(215,0,21,.08);color:var(--bad)}
html[data-theme="dark"] .notice.warn{background:rgba(255,69,58,.12)}

.field textarea{padding:10px 12px;border:1px solid var(--line-2);border-radius:10px;background:var(--surface);
  font-size:14px;color:var(--ink);outline:none;resize:vertical;font-family:inherit;line-height:1.6}
.field textarea:focus{border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}

@media(max-width:700px){
  .rank-table th:nth-child(4),.rank-table td:nth-child(4),
  .rank-table th:nth-child(5),.rank-table td:nth-child(5),
  .rank-table th:nth-child(8),.rank-table td:nth-child(8){display:none}
  .wc-bar{flex-direction:column;align-items:flex-start}
}


/* ============================================================
   v6：咕值顏色（洛谷風格）
   ============================================================ */
.tier-gray{color:#8e8e93}
.tier-blue{color:#2f6fbf}
.tier-green{color:#1d8f4e}
.tier-orange{color:#c1660f}
.tier-red{color:#d6453d}
.tier-purple{color:#8b5cf6}
html[data-theme="dark"] .tier-gray{color:#98989d}
html[data-theme="dark"] .tier-blue{color:#5aa0ef}
html[data-theme="dark"] .tier-green{color:#3ddc97}
html[data-theme="dark"] .tier-orange{color:#f0b45c}
html[data-theme="dark"] .tier-red{color:#ff6b6b}
html[data-theme="dark"] .tier-purple{color:#b39dff}
.rn{font-size:11px;color:var(--faint);margin-left:6px;font-weight:400}
.rank-table .tag{margin-left:6px}
.rank-table td{vertical-align:middle}


/* ============================================================
   v7：語言選單、教材、背景層次
   ============================================================ */
.lang-menu{position:relative}
.lang-menu{cursor:pointer}
.lang-menu::after{display:none}
.lang-list{display:none;position:absolute;right:0;top:38px;z-index:60;min-width:168px;
  background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:6px;
  box-shadow:var(--shadow-lg)}
.lang-menu.open .lang-list{display:block}
.lang-list button{display:flex;align-items:center;gap:6px;width:100%;text-align:left;border:0;background:transparent;
  padding:8px 10px;border-radius:8px;font-size:13px;color:var(--ink);cursor:pointer}
.lang-list button:hover{background:var(--soft)}
.lang-list button.on{background:var(--accent-soft);color:var(--accent);font-weight:600}
.lang-list .dim{font-size:10px;color:var(--faint)}

.tb-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px}
.tb-card{padding:0;overflow:hidden;display:flex;flex-direction:column}
.tb-cover{height:96px;display:grid;place-items:center;font-size:12px;font-weight:700;letter-spacing:.08em;
  color:#fff;background:linear-gradient(135deg,#3a3a3c,#1d1d1f)}
.tb-cover.pdf{background:linear-gradient(135deg,#d6453d,#a8241d)}
.tb-body{padding:14px}
.tb-title{font-size:13.5px;font-weight:600;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;
  -webkit-box-orient:vertical;overflow:hidden;min-height:40px}
.tb-meta{font-size:11.5px;color:var(--faint);margin-top:6px}

/* 背景：多層光暈 + 極淡網格，讓白底有層次 */
html[data-theme="light"] body{background:#f5f5f7}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(1100px 620px at 4% -16%, rgba(0,113,227,.34), transparent 68%),
    radial-gradient(900px 520px at 48% -20%, rgba(122,90,255,.30), transparent 70%),
    radial-gradient(1000px 560px at 98% -12%, rgba(0,172,150,.26), transparent 68%),
    radial-gradient(900px 520px at 12% 108%, rgba(0,113,227,.16), transparent 70%),
    radial-gradient(900px 520px at 88% 112%, rgba(160,90,255,.18), transparent 72%);
}
html[data-theme="dark"] body::before{opacity:.45}
body::after{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:
    linear-gradient(rgba(20,40,90,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20,40,90,.045) 1px, transparent 1px);
  background-size:32px 32px;
  -webkit-mask-image:radial-gradient(1100px 520px at 50% -6%, #000 25%, transparent 72%);
  mask-image:radial-gradient(1100px 520px at 50% -6%, #000 25%, transparent 72%);
}
html[data-theme="dark"] body::after{background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px)}
main{position:relative;z-index:1}


/* 拼音／注音模式：字變長了，縮一點避免爆版 */
html[lang="pinyin"] .tabs button,
html[lang="zhuyin"] .tabs button{font-size:10.5px;padding:6px 7px;line-height:1.25}
html[lang="pinyin"] .brand,
html[lang="zhuyin"] .brand{font-size:10.5px}
html[lang="pinyin"] .brand .mark,
html[lang="zhuyin"] .brand .mark{font-size:8px}
html[lang="pinyin"] .h1,
html[lang="zhuyin"] .h1{font-size:24px;line-height:1.35}
html[lang="pinyin"] .hero-main .big,
html[lang="zhuyin"] .hero-main .big{font-size:38px;line-height:1.2}
html[lang="zhuyin"] body{font-family:"Microsoft JhengHei","PingFang TC","Noto Sans TC",system-ui,sans-serif}


/* ============================================================
   v8：課表、課表晶片、更飽和的背景
   ============================================================ */
.cls-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:10px}
.cls-col{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:10px;min-height:160px}
.cls-hd{font-size:11.5px;font-weight:700;color:var(--faint);letter-spacing:.06em;margin-bottom:8px;text-align:center}
.cls-item{background:var(--soft);border-radius:10px;padding:8px 9px;margin-bottom:8px;border-left:2px solid var(--line-2)}
.cls-item.mine{background:var(--accent-soft);border-left-color:var(--accent)}
.cls-time{font-size:10.5px;color:var(--sub);font-variant-numeric:tabular-nums}
.cls-course{font-size:12.5px;font-weight:600;line-height:1.35;margin-top:2px}
.cls-who{font-size:10.5px;color:var(--faint);margin-top:2px}
.cls-empty{text-align:center;color:var(--faint);font-size:12px;padding:10px 0}
.cls-chip{margin-top:5px;font-size:10px;font-weight:600;color:var(--accent);background:var(--accent-soft);
  border-radius:5px;padding:1px 5px;display:inline-block;cursor:pointer}
.cls-chip:hover{filter:brightness(.95)}
@media(max-width:900px){
  .cls-grid{grid-template-columns:1fr}
  .cls-col{min-height:0}
}


/* canvas-mesh：把漸層放到 body 上，整個頁面（含長頁）都吃得到 */
html{background:#f5f5f7}
body::before{display:none !important}
html[data-theme="light"] body{
  background:
    radial-gradient(1200px 680px at 2% -14%, rgba(0,113,227,.30), transparent 66%),
    radial-gradient(980px 560px at 46% -18%, rgba(122,90,255,.26), transparent 68%),
    radial-gradient(1080px 600px at 100% -10%, rgba(0,172,150,.24), transparent 66%),
    radial-gradient(1000px 620px at 8% 112%, rgba(0,113,227,.16), transparent 70%),
    radial-gradient(1000px 620px at 92% 116%, rgba(160,90,255,.16), transparent 72%),
    #f5f5f7;
  background-attachment:fixed;
}
html[data-theme="dark"] body{
  background:
    radial-gradient(1100px 620px at 4% -12%, rgba(10,132,255,.20), transparent 66%),
    radial-gradient(900px 520px at 60% -16%, rgba(122,90,255,.18), transparent 70%),
    radial-gradient(900px 560px at 100% 108%, rgba(0,172,150,.12), transparent 70%),
    #000;
  background-attachment:fixed;
}


/* canvas-v2：漸層放到 html，避免頁尾出現白帶 */
html[data-theme="light"]{
  background:
    radial-gradient(1200px 680px at 2% -14%, rgba(0,113,227,.30), transparent 66%),
    radial-gradient(980px 560px at 46% -18%, rgba(122,90,255,.26), transparent 68%),
    radial-gradient(1080px 600px at 100% -10%, rgba(0,172,150,.24), transparent 66%),
    radial-gradient(1000px 620px at 8% 112%, rgba(0,113,227,.14), transparent 72%),
    radial-gradient(1000px 620px at 92% 116%, rgba(160,90,255,.14), transparent 72%),
    #f5f5f7;
  background-attachment:fixed;
  min-height:100%;
}
html[data-theme="dark"]{
  background:
    radial-gradient(1100px 620px at 4% -12%, rgba(10,132,255,.20), transparent 66%),
    radial-gradient(900px 520px at 60% -16%, rgba(122,90,255,.18), transparent 70%),
    radial-gradient(900px 560px at 100% 108%, rgba(0,172,150,.12), transparent 70%),
    #000;
  background-attachment:fixed;
  min-height:100%;
}
html[data-theme="light"] body, html[data-theme="dark"] body{background:transparent}