/* 國中模考題庫：墨綠 + 金色 + 米白 */
:root {
  --bg: #f4f1e8;
  --card: #ffffff;
  --line: #e9e4d6;
  --line-soft: #f0ece2;
  --ink: #1d2a24;
  --ink-2: #4b5a52;
  --muted: #8a918b;
  --green: #1d4a3b;
  --green-2: #2c6350;
  --green-deep: #10231c;
  --green-side: #122a21;
  --gold: #b8914f;
  --gold-2: #c9a15a;
  --gold-ink: #8a6a2e;
  --track: #efebe0;
  --red: #b4483c;
  --red-bg: #fbeeec;
  --ok: #2f7d5b;
  --ok-bg: #e8f3ed;
  --warn-bg: #fbf4e6;
  --radius: 20px;
  --shadow: 0 1px 2px rgba(29, 42, 36, .04), 0 6px 20px rgba(29, 42, 36, .04);
  --serif: 'Noto Serif TC', 'Songti TC', serif;
  --sans: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, 'PingFang TC', sans-serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
}
a { color: var(--green); text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
h1, h2, h3 { font-family: var(--serif); margin: 0; color: var(--green-deep); letter-spacing: .02em; }
.boot { padding: 40vh 0; text-align: center; color: var(--muted); }
.muted { color: var(--muted); }
.nowrap { white-space: nowrap; }
.num { font-variant-numeric: tabular-nums; }

/* ---------- 版面 ---------- */
.shell { min-height: 100vh; }
.sidebar {
  position: fixed; inset: 0 auto 0 0; width: 272px; z-index: 40;
  background: var(--green-side); color: #d8dfd9;
  display: flex; flex-direction: column; padding: 22px 14px 18px;
  transform: translateX(-100%); transition: transform .25s ease;
  padding-top: max(22px, env(safe-area-inset-top));
}
.shell.open .sidebar { transform: none; }
.scrim { position: fixed; inset: 0; background: rgba(16, 35, 28, .45); backdrop-filter: blur(3px); z-index: 30; display: none; }
.shell.open .scrim { display: block; }
.brand { display: flex; gap: 14px; align-items: center; padding: 0 8px 20px; border-bottom: 1px solid rgba(255,255,255,.08); margin-bottom: 16px; }
.brand-logo {
  width: 52px; height: 52px; border-radius: 14px; border: 2px solid var(--gold-2);
  display: grid; place-items: center; font-family: var(--serif); font-weight: 900; font-size: 26px; color: #f4ecd8; background: #16352a;
}
.brand-name { font-family: var(--serif); font-weight: 700; font-size: 20px; color: #f4ecd8; }
.brand-sub { font-size: 11px; letter-spacing: .28em; color: #9fb0a6; }
.nav { display: flex; flex-direction: column; gap: 4px; flex: 1; overflow-y: auto; }
.nav a {
  display: flex; align-items: center; gap: 14px; padding: 12px 16px; border-radius: 14px;
  color: #cfd8d2; font-size: 16px; position: relative;
}
.nav a:hover { background: rgba(255,255,255,.04); }
.nav a.active { background: #2a2f22; color: #f4ecd8; font-weight: 700; }
.nav a.active::before { content: ''; position: absolute; left: 0; top: 12px; bottom: 12px; width: 4px; border-radius: 4px; background: var(--gold-2); }
.nav svg { width: 22px; height: 22px; flex: none; stroke: currentColor; fill: none; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.nav .sep { font-size: 11px; letter-spacing: .2em; color: #6f8479; padding: 14px 16px 4px; }
.me { background: #16302a; border: 1px solid rgba(255,255,255,.06); border-radius: 16px; padding: 14px; margin-top: 12px; }
.me-row { display: flex; gap: 12px; align-items: center; margin-bottom: 12px; min-width: 0; }
.avatar { width: 44px; height: 44px; border-radius: 50%; background: var(--gold); color: var(--green-deep); display: grid; place-items: center; font-weight: 700; font-family: var(--serif); font-size: 20px; flex: none; }
.me-name { color: #f4ecd8; font-weight: 700; }
.me-mail { font-size: 13px; color: #9fb0a6; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.me .btn-ghost { width: 100%; border-color: rgba(255,255,255,.18); color: #d8dfd9; }
.me-links { display: flex; justify-content: center; margin-top: 8px; font-size: 13px; }
.me-links a { color: #9fb0a6; }

.topbar {
  position: sticky; top: 0; z-index: 20; background: #fff; border-bottom: 1px solid var(--line);
  display: flex; align-items: center; gap: 12px; padding: 12px 16px; padding-top: max(12px, env(safe-area-inset-top));
}
.topbar h1 { font-size: 22px; }
.icon-btn { border: 0; background: none; padding: 8px; border-radius: 10px; cursor: pointer; display: grid; place-items: center; }
.icon-btn svg { width: 26px; height: 26px; stroke: var(--ink-2); fill: none; stroke-width: 1.8; stroke-linecap: round; }
.main { max-width: 1120px; margin: 0 auto; padding: 22px 16px 60px; }

@media (min-width: 1024px) {
  .sidebar { transform: none; }
  .scrim, .topbar .icon-btn { display: none !important; }
  .content { margin-left: 272px; }
  .topbar { padding-left: 32px; }
  .main { padding: 32px 32px 80px; }
}

/* ---------- 共用元件 ---------- */
.page-head { margin-bottom: 20px; display: flex; flex-wrap: wrap; gap: 12px; align-items: flex-end; justify-content: space-between; }
.page-head h2 { font-size: 30px; font-weight: 900; }
.page-head p { margin: 4px 0 0; color: var(--muted); }
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (min-width: 900px) { .grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); } .grid-2-lg { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 899px) { .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.stack { display: flex; flex-direction: column; gap: 16px; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.card-head { padding: 20px 24px 16px; border-bottom: 1px solid var(--line-soft); display: flex; gap: 12px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.card-head h3 { font-size: 20px; }
.card-head p { margin: 2px 0 0; color: var(--muted); font-size: 14px; }
.card-body { padding: 20px 24px; }
.card-link { display: block; padding: 24px; color: inherit; transition: transform .15s, box-shadow .15s; }
.card-link:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(29,42,36,.08); }
.card-link h3 { font-size: 21px; margin-bottom: 6px; }
.card-link p { margin: 0; color: var(--muted); }

.stat { padding: 20px 22px; }
.stat-label { color: var(--ink-2); font-size: 15px; }
.stat-value { font-family: var(--serif); font-weight: 900; font-size: 40px; line-height: 1.25; color: var(--green-deep); font-variant-numeric: tabular-nums; }
.stat-value.gold { color: var(--gold-ink); }
.stat-value.red { color: var(--red); }
.stat-sub { font-size: 14px; color: var(--ink-2); }
@media (max-width: 420px) { .stat-value { font-size: 34px; } }

.bars { display: flex; flex-direction: column; gap: 18px; }
.bar-row .bar-top { display: flex; justify-content: space-between; gap: 12px; margin-bottom: 8px; }
.bar-row .bar-name { font-weight: 700; color: var(--ink); min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bar-row .bar-val { color: var(--muted); white-space: nowrap; font-variant-numeric: tabular-nums; }
.track { height: 12px; background: var(--track); border-radius: 99px; overflow: hidden; }
.fill { height: 100%; border-radius: 99px; background: var(--green); min-width: 4px; }
.fill.grad { background: linear-gradient(90deg, var(--green), var(--gold-2)); }
.fill.warn { background: var(--gold); }
.fill.bad { background: var(--red); }

.list { list-style: none; margin: 0; padding: 0; }
.list > li { padding: 16px 24px; border-top: 1px solid var(--line-soft); display: flex; align-items: center; gap: 14px; }
.list > li:first-child { border-top: 0; }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--gold); flex: none; }
.list .grow { flex: 1; min-width: 0; }
.list .time { color: var(--muted); font-size: 14px; white-space: nowrap; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px 18px; border-radius: 12px;
  border: 1px solid var(--green); background: var(--green); color: #fff; font-weight: 700; cursor: pointer; white-space: nowrap;
  font-size: 15px; line-height: 1.3; min-height: 42px;
}
.btn:hover { background: var(--green-2); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-ghost { background: transparent; color: var(--green); border-color: var(--line); }
.btn-ghost:hover { background: var(--line-soft); }
.btn-gold { background: var(--gold); border-color: var(--gold); color: #fff; }
.btn-gold:hover { background: var(--gold-ink); }
.btn-danger { background: transparent; color: var(--red); border-color: #efd3cf; }
.btn-danger:hover { background: var(--red-bg); }
.btn-sm { padding: 6px 12px; min-height: 34px; font-size: 14px; border-radius: 10px; }
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.link-arrow { color: var(--ink-2); font-weight: 700; white-space: nowrap; }

.tag { display: inline-block; font-size: 12px; padding: 2px 9px; border-radius: 99px; background: var(--line-soft); color: var(--ink-2); white-space: nowrap; }
.tag.green { background: var(--ok-bg); color: var(--ok); }
.tag.red { background: var(--red-bg); color: var(--red); }
.tag.gold { background: var(--warn-bg); color: var(--gold-ink); }
.tags { display: flex; flex-wrap: wrap; gap: 6px; }

/* 表單 */
.form { display: grid; gap: 14px; }
.field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.field > span { font-size: 14px; color: var(--ink-2); font-weight: 500; }
.input, select.input, textarea.input {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 12px; background: #fff; min-height: 42px; font-size: 16px;
}
textarea.input { min-height: 96px; resize: vertical; line-height: 1.6; }
.input:focus { outline: 2px solid rgba(184,145,79,.35); border-color: var(--gold); }
.row { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
.checks { display: flex; flex-wrap: wrap; gap: 8px; }
.chk { display: inline-flex; align-items: center; gap: 6px; padding: 7px 12px; border: 1px solid var(--line); border-radius: 99px; cursor: pointer; background: #fff; font-size: 14px; user-select: none; }
.chk input { accent-color: var(--green); margin: 0; }
.chk:has(input:checked) { border-color: var(--green); background: var(--ok-bg); color: var(--green); font-weight: 700; }
.err { color: var(--red); font-size: 14px; min-height: 1em; white-space: pre-wrap; }

/* 表格 */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table.table { width: 100%; border-collapse: collapse; font-size: 15px; }
.table th, .table td { text-align: left; padding: 12px 16px; border-top: 1px solid var(--line-soft); vertical-align: middle; }
.table th { font-size: 13px; color: var(--muted); font-weight: 500; border-top: 0; background: #fbfaf6; white-space: nowrap; }
.table tr.click { cursor: pointer; }
.table tr.click:hover td { background: #fbfaf6; }

/* 題目 */
.q { padding: 20px 24px; border-top: 1px solid var(--line-soft); }
.q:first-child { border-top: 0; }
.q-head { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-bottom: 10px; }
.q-no { font-family: var(--serif); font-weight: 900; color: var(--gold-ink); font-size: 18px; }
.q-content { font-size: 17px; line-height: 1.85; word-break: break-word; }
.q-img { max-width: 100%; max-height: 320px; margin: 10px 0; border-radius: 10px; border: 1px solid var(--line-soft); display: block; }
.opts { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; }
.opt { display: flex; gap: 12px; align-items: flex-start; padding: 12px 14px; border: 1.5px solid var(--line); border-radius: 14px; cursor: pointer; background: #fff; transition: border-color .12s, background .12s; }
.opt:hover { border-color: #d6cdb5; }
.opt .letter { width: 30px; height: 30px; border-radius: 50%; border: 1.5px solid var(--line); display: grid; place-items: center; font-weight: 700; flex: none; font-size: 14px; color: var(--ink-2); }
.opt .txt { padding-top: 3px; min-width: 0; word-break: break-word; }
.opt.sel { border-color: var(--green); background: var(--ok-bg); }
.opt.sel .letter { background: var(--green); border-color: var(--green); color: #fff; }
.opt.right { border-color: var(--ok); background: var(--ok-bg); }
.opt.right .letter { background: var(--ok); border-color: var(--ok); color: #fff; }
.opt.wrong { border-color: var(--red); background: var(--red-bg); }
.opt.wrong .letter { background: var(--red); border-color: var(--red); color: #fff; }
.opt.static { cursor: default; }
.explain { margin-top: 14px; padding: 14px 16px; background: var(--warn-bg); border-radius: 14px; font-size: 15px; line-height: 1.8; }
.explain b { color: var(--gold-ink); }
.verdict { font-weight: 700; }
.verdict.ok { color: var(--ok); }
.verdict.no { color: var(--red); }

/* 作答 */
.quiz-bar { position: sticky; top: 64px; z-index: 10; background: rgba(244,241,232,.94); backdrop-filter: blur(6px); padding: 10px 0; margin: -10px 0 10px; display: flex; gap: 12px; align-items: center; }
.quiz-bar .track { flex: 1; height: 8px; }
.timer { font-variant-numeric: tabular-nums; font-weight: 700; color: var(--ink-2); }
.timer.low { color: var(--red); }
.qnav { display: flex; flex-wrap: wrap; gap: 6px; }
.qnav button { width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--line); background: #fff; cursor: pointer; font-variant-numeric: tabular-nums; }
.qnav button.done { background: var(--green); color: #fff; border-color: var(--green); }
.qnav button.cur { outline: 2px solid var(--gold); }
.qnav button.right { background: var(--ok-bg); border-color: var(--ok); color: var(--ok); }
.qnav button.wrong { background: var(--red-bg); border-color: var(--red); color: var(--red); }

.score-ring { font-family: var(--serif); font-size: 64px; font-weight: 900; color: var(--gold-ink); line-height: 1; }
.empty { padding: 36px 24px; text-align: center; color: var(--muted); }

/* 登入 */
.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 24px 16px; background: radial-gradient(1200px 600px at 20% -10%, #1d4a3b 0%, var(--green-deep) 55%); }
.login-card { width: 100%; max-width: 420px; background: #fff; border-radius: 24px; padding: 32px 28px; box-shadow: 0 30px 80px rgba(0,0,0,.35); }
.login-card .brand { border: 0; padding: 0 0 18px; margin: 0; }
.login-card .brand-name { color: var(--green-deep); }
.login-card .brand-sub { color: var(--muted); }
.login-card .brand-logo { background: var(--green-deep); }

/* 分析 */
.trend { width: 100%; height: auto; display: block; }
.heat { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 10px; }
.heat-cell { border-radius: 14px; padding: 12px 14px; border: 1px solid var(--line); }
.heat-cell .h-name { font-weight: 700; font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.heat-cell .h-val { font-family: var(--serif); font-weight: 900; font-size: 24px; }
.heat-cell .h-sub { font-size: 12px; color: var(--ink-2); }
.dist { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.dist span { font-size: 13px; padding: 2px 10px; border-radius: 99px; background: var(--line-soft); }
.dist span.c { background: var(--ok-bg); color: var(--ok); font-weight: 700; }
.dist span.w { background: var(--red-bg); color: var(--red); }
.clamp { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.tabs { display: flex; gap: 6px; flex-wrap: wrap; }
.tabs a { padding: 8px 14px; border-radius: 99px; border: 1px solid var(--line); background: #fff; color: var(--ink-2); font-size: 14px; }
.tabs a.on { background: var(--green); border-color: var(--green); color: #fff; font-weight: 700; }

/* 對話框 */
.modal-bg { position: fixed; inset: 0; z-index: 60; background: rgba(16,35,28,.5); display: grid; place-items: center; padding: 16px; }
.modal { background: #fff; border-radius: 22px; width: 100%; max-width: 520px; max-height: 90vh; overflow: auto; }
.modal .card-head { position: sticky; top: 0; background: #fff; z-index: 1; }

#toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%) translateY(20px); background: var(--green-deep); color: #fff; padding: 12px 20px; border-radius: 14px; opacity: 0; pointer-events: none; transition: all .2s; z-index: 100; max-width: calc(100vw - 32px); }
#toast.show { opacity: 1; transform: translateX(-50%); }
#toast.error { background: var(--red); }

.pager { display: flex; gap: 8px; align-items: center; justify-content: center; padding: 16px; }
.preview { border: 1px dashed var(--line); border-radius: 14px; padding: 4px 0; background: #fcfbf8; }

/* ---------- 列印（匯出 PDF） ---------- */
.paper-sheet { background: #fff; color: #000; padding: 28px; border-radius: var(--radius); border: 1px solid var(--line); font-family: 'Times New Roman', 'DFKai-SB', 'BiauKai', var(--serif); }
.paper-sheet h1 { text-align: center; font-size: 24px; color: #000; margin-bottom: 4px; }
.paper-meta { text-align: center; margin-bottom: 18px; font-size: 15px; }
.paper-q { margin: 0 0 16px; break-inside: avoid; font-size: 16px; line-height: 1.9; }
.paper-q .p-opts { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 2px 18px; margin-top: 2px; }
.paper-q img { max-width: 60%; max-height: 240px; display: block; margin: 6px 0; }
.answer-key { margin-top: 24px; border-top: 2px solid #000; padding-top: 12px; }
.answer-key table { border-collapse: collapse; }
.answer-key td { border: 1px solid #000; padding: 2px 10px; text-align: center; }

@media print {
  @page { size: A4; margin: 16mm 14mm; }
  body { background: #fff; }
  .sidebar, .topbar, .scrim, .no-print, #toast { display: none !important; }
  .content { margin: 0 !important; }
  .main { padding: 0 !important; max-width: none; }
  .paper-sheet { border: 0; padding: 0; border-radius: 0; }
  .page-break { break-before: page; }
}

/* 檔案上傳區 */
.drop { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; text-align: center; padding: 28px 16px; border: 2px dashed #d6cdb5; border-radius: 16px; background: #fcfbf8; cursor: pointer; transition: background .15s, border-color .15s; }
.drop:hover, .drop.over { border-color: var(--gold); background: var(--warn-bg); }
.drop input { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.drop b { color: var(--green); }
.file-list { border: 1px solid var(--line-soft); border-radius: 14px; }
.file-list > li { padding: 12px 16px; flex-wrap: wrap; }