/* =========================================================
   心理健康量表平台  Psychological Care
   共用樣式表
   ========================================================= */

:root {
  /* 色彩 */
  --c-bg:            #f6f8fa;
  --c-surface:       #ffffff;
  --c-surface-alt:   #eef3f7;
  --c-border:        #dde5ec;
  --c-text:          #1f2a37;
  --c-text-soft:     #5b6b7c;
  --c-text-faint:    #8798a8;

  --c-primary:       #2f7d8f;
  --c-primary-dark:  #23606e;
  --c-primary-soft:  #e3f1f4;
  --c-accent:        #6b8fb5;

  /* 嚴重度色階 */
  --c-lv0: #3f9d6d;   /* 正常 / 良好 */
  --c-lv1: #86a63c;   /* 輕度 */
  --c-lv2: #d99b26;   /* 中度 */
  --c-lv3: #d9702b;   /* 中重度 */
  --c-lv4: #c1443b;   /* 重度 */

  --c-lv0-soft: #e6f4ec;
  --c-lv1-soft: #f0f5e2;
  --c-lv2-soft: #fbf1dc;
  --c-lv3-soft: #fbe9dd;
  --c-lv4-soft: #f9e3e1;

  --c-warn-bg:   #fff6e5;
  --c-warn-bd:   #f0c674;
  --c-alert-bg:  #fdeceb;
  --c-alert-bd:  #e6a09a;

  --radius:    14px;
  --radius-sm: 9px;
  --shadow:    0 1px 2px rgba(31,42,55,.05), 0 6px 20px rgba(31,42,55,.06);
  --shadow-sm: 0 1px 2px rgba(31,42,55,.06);
  --maxw: 940px;

  --font: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", -apple-system,
          BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --c-bg:          #12171d;
    --c-surface:     #1a2129;
    --c-surface-alt: #212b34;
    --c-border:      #2e3a45;
    --c-text:        #e7edf3;
    --c-text-soft:   #a8b7c5;
    --c-text-faint:  #7d8d9c;
    --c-primary:     #57b0c2;
    --c-primary-dark:#7ec8d8;
    --c-primary-soft:#1d333a;
    --c-accent:      #8aabce;
    --c-lv0-soft: #162b22; --c-lv1-soft: #232b16; --c-lv2-soft: #33280f;
    --c-lv3-soft: #351f13; --c-lv4-soft: #351a19;
    --c-warn-bg:  #2e2513; --c-warn-bd:  #6b5320;
    --c-alert-bg: #331b19; --c-alert-bd: #6e3833;
    --shadow:     0 1px 2px rgba(0,0,0,.35), 0 6px 20px rgba(0,0,0,.30);
    --shadow-sm:  0 1px 2px rgba(0,0,0,.35);
  }
}
:root[data-theme="dark"] {
  --c-bg:          #12171d;
  --c-surface:     #1a2129;
  --c-surface-alt: #212b34;
  --c-border:      #2e3a45;
  --c-text:        #e7edf3;
  --c-text-soft:   #a8b7c5;
  --c-text-faint:  #7d8d9c;
  --c-primary:     #57b0c2;
  --c-primary-dark:#7ec8d8;
  --c-primary-soft:#1d333a;
  --c-accent:      #8aabce;
  --c-lv0-soft: #162b22; --c-lv1-soft: #232b16; --c-lv2-soft: #33280f;
  --c-lv3-soft: #351f13; --c-lv4-soft: #351a19;
  --c-warn-bg:  #2e2513; --c-warn-bd:  #6b5320;
  --c-alert-bg: #331b19; --c-alert-bd: #6e3833;
  --shadow:     0 1px 2px rgba(0,0,0,.35), 0 6px 20px rgba(0,0,0,.30);
  --shadow-sm:  0 1px 2px rgba(0,0,0,.35);
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;     /* iOS 橫置時不自動放大字級 */
  scroll-behavior: smooth;
  overscroll-behavior-y: none;        /* 避免下拉時整頁橡皮筋回彈 */
}

/* 觸控裝置：移除點擊時的灰色閃爍，改用自訂的 :active 狀態 */
* { -webkit-tap-highlight-color: transparent; }

body {
  margin: 0;
  /* iPhone 瀏海／底部 Home Indicator 的安全區域 */
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-text);
  background: var(--c-bg);
  overflow-wrap: break-word;
}

a { color: var(--c-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; height: auto; }

h1, h2, h3, h4 { line-height: 1.35; margin: 0 0 .6em; font-weight: 700; letter-spacing: .01em; }
h1 { font-size: 1.85rem; }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.08rem; }
p  { margin: 0 0 1em; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 760px; }

/* ---------- 頁首 ---------- */
.site-header {
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  position: sticky; top: 0; z-index: 50;
}
.site-header .wrap {
  display: flex; align-items: center; gap: 16px;
  min-height: 62px; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--c-text); font-size: 1.05rem; }
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 32px; height: 32px; flex: none; border-radius: 9px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  display: grid; place-items: center; color: #fff; font-size: 17px;
}
.brand-sub { font-weight: 400; font-size: .78rem; color: var(--c-text-faint); display: block; line-height: 1.2; }
.site-nav { margin-left: auto; display: flex; gap: 4px; flex-wrap: wrap; }
.site-nav a {
  padding: 7px 12px; border-radius: 8px; font-size: .9rem;
  color: var(--c-text-soft);
}
.site-nav a:hover { background: var(--c-surface-alt); text-decoration: none; color: var(--c-text); }
.site-nav a[aria-current="page"] { color: var(--c-primary); background: var(--c-primary-soft); font-weight: 600; }

.theme-toggle {
  border: 1px solid var(--c-border); background: var(--c-surface); color: var(--c-text-soft);
  width: 44px; height: 44px; border-radius: 10px; cursor: pointer; font-size: 16px;
  display: grid; place-items: center; padding: 0;
  touch-action: manipulation; flex: none;
}
.theme-toggle:hover { background: var(--c-surface-alt); }

/* ---------- 主體 ---------- */
main { padding: 34px 0 60px; }
.section { margin-bottom: 40px; }

.hero {
  background: linear-gradient(160deg, var(--c-primary-soft), var(--c-surface) 70%);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 38px 32px;
  margin-bottom: 34px;
}
.hero h1 { font-size: 2rem; margin-bottom: .35em; }
.hero p { color: var(--c-text-soft); max-width: 62ch; margin-bottom: 0; }
.hero .lede { font-size: 1.05rem; }

.pill {
  display: inline-block; font-size: .76rem; font-weight: 600; letter-spacing: .04em;
  padding: 4px 11px; border-radius: 999px;
  background: var(--c-primary-soft); color: var(--c-primary-dark);
  border: 1px solid var(--c-border); margin-bottom: 14px;
}

/* ---------- 卡片格線 ---------- */
.grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); }

.card {
  background: var(--c-surface); border: 1px solid var(--c-border);
  border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow-sm);
}

.scale-card {
  display: flex; flex-direction: column;
  transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease;
  color: inherit; position: relative;
}
a.scale-card:hover {
  text-decoration: none; transform: translateY(-3px);
  box-shadow: var(--shadow); border-color: var(--c-primary);
}
.scale-card .code {
  font-size: .74rem; font-weight: 700; letter-spacing: .09em;
  color: var(--c-primary); text-transform: uppercase; margin-bottom: 6px;
}
.scale-card h3 { margin-bottom: .35em; font-size: 1.12rem; }
.scale-card p { color: var(--c-text-soft); font-size: .9rem; flex: 1; margin-bottom: 14px; }
.scale-meta {
  display: flex; gap: 14px; flex-wrap: wrap;
  font-size: .8rem; color: var(--c-text-faint);
  border-top: 1px dashed var(--c-border); padding-top: 12px;
}
.scale-meta span { display: inline-flex; align-items: center; gap: 5px; }
.done-flag {
  position: absolute; top: 14px; right: 14px; font-size: .7rem; font-weight: 600;
  background: var(--c-lv0-soft); color: var(--c-lv0);
  border: 1px solid currentColor; border-radius: 999px; padding: 2px 9px;
}

/* ---------- 按鈕 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px; min-height: 48px; border-radius: 10px;
  font-size: .95rem; font-weight: 600;
  border: 1px solid transparent; cursor: pointer; font-family: inherit;
  background: var(--c-primary); color: #fff;
  transition: background .15s ease, opacity .15s, transform .08s;
  -webkit-user-select: none; user-select: none; touch-action: manipulation;
}
@media (hover: hover) and (pointer: fine) {
  .btn:hover { background: var(--c-primary-dark); text-decoration: none; color: #fff; }
}
.btn:active { transform: scale(.98); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-ghost { background: transparent; color: var(--c-primary); border-color: var(--c-border); }
.btn-ghost:hover { background: var(--c-surface-alt); color: var(--c-primary-dark); }
.btn-sm { padding: 9px 15px; min-height: 40px; font-size: .86rem; }
.btn-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }

/* ---------- 提示框 ---------- */
.note {
  border: 1px solid var(--c-border); background: var(--c-surface-alt);
  border-radius: var(--radius-sm); padding: 15px 18px; font-size: .9rem;
  color: var(--c-text-soft);
}
.note strong { color: var(--c-text); }
.note.warn  { background: var(--c-warn-bg);  border-color: var(--c-warn-bd); }
.note.alert { background: var(--c-alert-bg); border-color: var(--c-alert-bd); }
.note.alert strong { color: var(--c-lv4); }
.note :last-child { margin-bottom: 0; }
.note-title { font-weight: 700; color: var(--c-text); display: block; margin-bottom: 4px; }

/* ---------- 表格 ---------- */
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; margin-bottom: 1em; }
table { border-collapse: collapse; width: 100%; font-size: .9rem; min-width: 460px; }
th, td { text-align: left; padding: 10px 13px; border-bottom: 1px solid var(--c-border); }
th { background: var(--c-surface-alt); font-weight: 600; font-size: .84rem; color: var(--c-text-soft); }
tbody tr:last-child td { border-bottom: none; }

/* ---------- 測驗 ---------- */
.quiz-head { margin-bottom: 22px; }
.quiz-head .code { font-size: .78rem; font-weight: 700; letter-spacing: .09em; color: var(--c-primary); }

.progress-bar {
  position: sticky; top: 62px; z-index: 40;
  background: var(--c-bg); padding: 12px 0 10px; margin-bottom: 18px;
  border-bottom: 1px solid var(--c-border);
}
.progress-track { height: 7px; border-radius: 99px; background: var(--c-border); overflow: hidden; }
.progress-fill {
  height: 100%; width: 0; border-radius: 99px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
  transition: width .3s ease;
}
.progress-label {
  display: flex; justify-content: space-between; gap: 10px;
  font-size: .82rem; color: var(--c-text-soft); margin-top: 7px;
}

.q-item {
  background: var(--c-surface); border: 1px solid var(--c-border);
  border-radius: var(--radius); padding: 20px 22px; margin-bottom: 14px;
  scroll-margin-top: 150px;
}
.q-item.unanswered-hl { border-color: var(--c-lv4); box-shadow: 0 0 0 3px var(--c-lv4-soft); }
.q-group-title {
  font-size: .82rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
  color: var(--c-primary); margin: 26px 0 10px; padding-left: 2px;
}
.q-text { font-weight: 600; margin-bottom: 4px; display: flex; gap: 10px; align-items: baseline; }
.q-num {
  flex: none; font-size: .8rem; font-weight: 700; color: var(--c-primary);
  background: var(--c-primary-soft); border-radius: 6px; padding: 1px 7px; min-width: 30px; text-align: center;
}
.q-hint { font-size: .84rem; color: var(--c-text-faint); margin: 0 0 12px 40px; }

.opts { display: grid; gap: 8px; margin-left: 40px; }
.opts.cols { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
@media (max-width: 640px) { .opts, .q-hint { margin-left: 0; } .opts.cols { grid-template-columns: 1fr; } }

.opt {
  display: flex; align-items: center; gap: 11px; cursor: pointer;
  border: 1px solid var(--c-border); border-radius: var(--radius-sm);
  padding: 11px 14px; font-size: .92rem; background: var(--c-surface);
  min-height: 48px;                    /* 觸控目標下限 */
  transition: border-color .12s, background .12s, transform .08s;
  -webkit-user-select: none; user-select: none;
}
/* 只有真正有滑鼠的裝置才套用 hover，避免手機點完後殘留高亮 */
@media (hover: hover) and (pointer: fine) {
  .opt:hover { border-color: var(--c-primary); background: var(--c-primary-soft); }
}
.opt:active { transform: scale(.985); background: var(--c-primary-soft); }
.opt input { accent-color: var(--c-primary); width: 17px; height: 17px; flex: none; margin: 0; }
.opt input:focus-visible { outline: 2px solid var(--c-primary); outline-offset: 2px; }
.opt.checked { border-color: var(--c-primary); background: var(--c-primary-soft); font-weight: 600; }
.opt .opt-val { margin-left: auto; font-size: .76rem; color: var(--c-text-faint); font-variant-numeric: tabular-nums; }

.field { margin-left: 40px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
@media (max-width: 640px) { .field { margin-left: 0; } }
.field input {
  font-family: inherit;
  /* 必須 ≥16px：iOS Safari 對小於 16px 的輸入框會在聚焦時自動放大整個頁面 */
  font-size: 16px;
  padding: 11px 13px; min-height: 46px;
  border: 1px solid var(--c-border); border-radius: var(--radius-sm);
  background: var(--c-surface); color: var(--c-text); max-width: 190px;
}
.field input:focus { outline: 2px solid var(--c-primary); outline-offset: 1px; border-color: var(--c-primary); }
.field .unit { font-size: .88rem; color: var(--c-text-soft); }

.quiz-actions {
  display: flex; gap: 12px; align-items: center; flex-wrap: wrap;
  margin-top: 26px; padding-top: 22px; border-top: 1px solid var(--c-border);
}
.quiz-actions .hint { font-size: .86rem; color: var(--c-text-faint); }

/* ---------- 結果 ---------- */
.result-hero {
  border: 1px solid var(--c-border); border-radius: var(--radius);
  padding: 28px 30px; margin-bottom: 22px; background: var(--c-surface);
  border-left: 6px solid var(--lv-color, var(--c-primary));
}
.result-score {
  display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-bottom: 6px;
}
.result-score .num {
  font-size: 3.1rem; font-weight: 800; line-height: 1;
  color: var(--lv-color, var(--c-primary)); font-variant-numeric: tabular-nums;
}
.result-score .max { font-size: 1.05rem; color: var(--c-text-faint); }
.result-badge {
  display: inline-block; font-weight: 700; font-size: .95rem; padding: 5px 15px;
  border-radius: 999px; background: var(--lv-soft, var(--c-primary-soft));
  color: var(--lv-color, var(--c-primary)); border: 1px solid currentColor;
}
.result-summary { color: var(--c-text-soft); margin: 14px 0 0; }

.gauge { margin: 20px 0 6px; }
.gauge svg { display: block; width: 100%; height: auto; overflow: visible; }

.bands { display: grid; gap: 7px; margin-top: 4px; }
.band-row {
  display: grid; grid-template-columns: 12px 88px 1fr; gap: 11px; align-items: center;
  font-size: .87rem; padding: 7px 11px; border-radius: var(--radius-sm);
  border: 1px solid transparent;
}
.band-row.is-current { border-color: currentColor; background: var(--band-soft); font-weight: 600; }
.band-dot { width: 12px; height: 12px; border-radius: 50%; background: var(--band-color); }
.band-range { font-variant-numeric: tabular-nums; color: var(--c-text-soft); font-size: .84rem; }
.band-row.is-current .band-range, .band-row.is-current .band-name { color: var(--band-color); }

.sub-list { display: grid; gap: 11px; }
.sub-row { display: grid; grid-template-columns: 1fr; gap: 5px; }
.sub-top { display: flex; justify-content: space-between; gap: 12px; font-size: .9rem; align-items: baseline; }
.sub-top .sub-name { font-weight: 600; }
.sub-top .sub-val { font-variant-numeric: tabular-nums; color: var(--c-text-soft); flex: none; }
.sub-track { height: 9px; border-radius: 99px; background: var(--c-surface-alt); overflow: hidden; }
.sub-fill { height: 100%; border-radius: 99px; background: var(--c-primary); transition: width .5s ease; }
.sub-desc { font-size: .82rem; color: var(--c-text-faint); }

.advice-list { margin: 0; padding-left: 1.25em; }
.advice-list li { margin-bottom: .5em; color: var(--c-text-soft); }
.advice-list li::marker { color: var(--c-primary); }

.sync-status { font-size: .84rem; color: var(--c-text-faint); display: inline-flex; align-items: center; gap: 7px; }
.sync-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--c-text-faint); flex: none; }
.sync-status.ok  .sync-dot { background: var(--c-lv0); }
.sync-status.err .sync-dot { background: var(--c-lv2); }

/* ---------- 統計 ---------- */
.stat-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
.stat {
  background: var(--c-surface); border: 1px solid var(--c-border);
  border-radius: var(--radius-sm); padding: 16px 18px; text-align: center;
}
.stat .n { font-size: 1.7rem; font-weight: 800; color: var(--c-primary); font-variant-numeric: tabular-nums; line-height: 1.2; }
.stat .l { font-size: .82rem; color: var(--c-text-soft); }

/* ---------- 頁尾 ---------- */
.site-footer {
  border-top: 1px solid var(--c-border); background: var(--c-surface);
  padding: 30px 0; font-size: .86rem; color: var(--c-text-soft);
}
.site-footer .cols { display: grid; gap: 22px; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); }
.site-footer h4 { font-size: .9rem; margin-bottom: .5em; color: var(--c-text); }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 5px; }
.site-footer .copy {
  margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--c-border);
  font-size: .8rem; color: var(--c-text-faint);
}

/* ---------- 雜項 ---------- */
.crumb { font-size: .85rem; color: var(--c-text-faint); margin-bottom: 14px; }
.crumb a { color: var(--c-text-soft); }
.muted { color: var(--c-text-faint); font-size: .86rem; }
.hidden { display: none !important; }
.center { text-align: center; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: -9999px; top: 0; background: var(--c-primary); color: #fff;
  padding: 10px 16px; z-index: 100; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

.divider { height: 1px; background: var(--c-border); border: 0; margin: 32px 0; }

/* ---------- 外部連結卡片（含 QR Code） ---------- */
.link-cards { display: grid; gap: 16px; }

.link-card {
  display: flex; align-items: center; gap: 20px;
  background: var(--c-surface); border: 1px solid var(--c-border);
  border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow-sm);
  transition: border-color .16s ease, box-shadow .16s ease;
}
.link-card:hover { border-color: var(--c-primary); box-shadow: var(--shadow); }

.link-card-main { flex: 1; min-width: 0; color: inherit; display: block; }
.link-card-main:hover { text-decoration: none; }
.link-card-main h3 { margin-bottom: .4em; font-size: 1.05rem; color: var(--c-primary); }
.link-card-main:hover h3 { color: var(--c-primary-dark); }
.link-card-main p { color: var(--c-text-soft); font-size: .89rem; margin-bottom: 10px; }
.link-card-main .ext { font-size: .85em; opacity: .75; }
.link-url {
  display: inline-block; font-size: .78rem; color: var(--c-text-faint);
  background: var(--c-surface-alt); border: 1px solid var(--c-border);
  border-radius: 6px; padding: 3px 9px; letter-spacing: .02em;
}

/* QR Code：永遠維持白底，深色模式下也要能掃描 */
.qr-box { flex: none; width: 124px; text-align: center; }
.qr-box img {
  width: 124px; height: 124px; display: block;
  background: #fff; padding: 7px; border-radius: 10px;
  border: 1px solid var(--c-border);
}
.qr-box span { display: block; margin-top: 6px; font-size: .72rem; color: var(--c-text-faint); }

@media (max-width: 560px) {
  .link-card { gap: 14px; padding: 16px; align-items: flex-start; }
  .qr-box { width: 92px; }
  .qr-box img { width: 92px; height: 92px; padding: 5px; }
  .link-card-main h3 { font-size: .98rem; }
  .link-card-main p { font-size: .85rem; }
}

/* ---------- 加入主畫面提示列 ---------- */
.install-banner {
  position: fixed; left: 12px; right: 12px;
  bottom: calc(12px + env(safe-area-inset-bottom));
  z-index: 80; display: flex; align-items: center; gap: 11px;
  background: var(--c-surface); border: 1px solid var(--c-border);
  border-radius: 14px; padding: 12px 14px;
  box-shadow: 0 6px 28px rgba(31,42,55,.18);
  font-size: .86rem; color: var(--c-text-soft);
  animation: install-in .35s ease both;
  max-width: 560px; margin: 0 auto;
}
@keyframes install-in { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .install-banner { animation: none; } }
.install-icon { font-size: 1.3rem; flex: none; }
.install-text { flex: 1; line-height: 1.5; }
.install-text b { font-style: normal; }
.install-banner .btn { flex: none; min-height: 40px; padding: 8px 16px; }
.install-close {
  flex: none; width: 34px; height: 34px; border-radius: 8px; padding: 0;
  border: none; background: transparent; color: var(--c-text-faint);
  font-size: 15px; cursor: pointer; line-height: 1;
}
.install-close:hover { background: var(--c-surface-alt); color: var(--c-text); }

@media print {
  .site-header, .site-footer, .quiz-actions, .btn, .progress-bar, .skip-link,
  .install-banner { display: none !important; }
  body { background: #fff; }
  .card, .result-hero, .q-item { box-shadow: none; break-inside: avoid; }
}

/* ---------- 頁尾與主內容的底部安全區（iPhone Home Indicator） ---------- */
.site-footer { padding-bottom: calc(30px + env(safe-area-inset-bottom)); }

/* ---------- 手機版頁首：導覽列改為橫向捲動，避免佔用過多高度 ---------- */
@media (max-width: 700px) {
  /* 頁首改為隨頁面捲動，把有限的螢幕高度留給題目；
     進度條改為吸附在最上方 */
  .site-header { position: static; }
  .site-header .wrap {
    min-height: 0; padding-top: 10px; padding-bottom: 8px;
    gap: 10px; row-gap: 8px;
  }
  .brand { order: 1; flex: 1 1 auto; font-size: .96rem; }
  .brand-mark { width: 28px; height: 28px; font-size: 15px; }
  .theme-toggle { order: 2; margin-left: auto; }
  .site-nav {
    order: 3; flex: 1 0 100%; margin-left: 0;
    flex-wrap: nowrap; overflow-x: auto; overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch; scrollbar-width: none;
  }
  .site-nav::-webkit-scrollbar { display: none; }
  .site-nav a {
    white-space: nowrap; font-size: .87rem;
    /* 觸控目標高度 ≥44px */
    padding: 11px 13px; display: inline-flex; align-items: center; min-height: 44px;
  }

  .progress-bar {
    top: 0;
    /* 進度條吸附時要蓋住底下捲動的內容 */
    padding-top: calc(10px + env(safe-area-inset-top, 0px));
    box-shadow: 0 4px 12px -6px rgba(0,0,0,.18);
  }
  .q-item { scroll-margin-top: 96px; }
  main { padding-top: 22px; padding-bottom: calc(48px + env(safe-area-inset-bottom)); }

  /* 卡片與區塊在手機上縮小留白，讓內容佔更多空間 */
  .wrap { padding-left: 16px; padding-right: 16px; }
  .card { padding: 18px 16px; }
  .section { margin-bottom: 30px; }
  .hero { padding: 24px 18px; border-radius: 12px; }

  /* 題號與題目文字在窄螢幕改為上下排列，題目可用整行寬度 */
  .q-text { gap: 9px; }
  .q-num { min-width: 28px; font-size: .78rem; }

  /* 送出按鈕在手機上放大為整行，方便單手點擊 */
  .quiz-actions { flex-direction: column; align-items: stretch; gap: 10px; }
  .quiz-actions .btn { width: 100%; }
  .quiz-actions .hint { text-align: center; }

  /* 結果頁的動作按鈕同樣排成整行 */
  .btn-row { flex-direction: column; align-items: stretch; }
  .btn-row .btn { width: 100%; }

  /* 分數主卡在手機上的字級 */
  .result-score .num { font-size: 2.6rem; }
  .result-hero { padding: 20px 16px; border-left-width: 5px; }

  /* 頁尾欄位改為單欄 */
  .site-footer .cols { gap: 18px; }
}

/* ---------- 橫置手機：頁首恢復吸附，避免捲動時失去導覽 ---------- */
@media (max-width: 900px) and (orientation: landscape) {
  .site-header { position: sticky; top: 0; }
  .progress-bar { top: 56px; }
}

@media (max-width: 560px) {
  h1 { font-size: 1.5rem; }
  .hero { padding: 26px 20px; }
  .hero h1 { font-size: 1.6rem; }
  .result-hero { padding: 22px 20px; }
  .q-item { padding: 16px 16px; }
  .band-row { grid-template-columns: 12px 74px 1fr; gap: 8px; font-size: .82rem; }
}