/* 商用英文專區 — 菲妮克絲AI語文學院（Phoenix AI Academy） */
:root {
  --bg: #FBF6EC;
  --bg-2: #F3EBDA;
  --ink: #1B1F3B;
  --ink-soft: #4A4F6B;
  --line: #E2D8C3;
  --card: #FFFFFF;
  --navy: #1E2A5A;
  --phoenix: #C2410C;
  --phoenix-soft: #FDE7D9;
  --gold: #F2B134;
  --good: #137A4B;
  --good-bg: #DDF4E7;
  --bad: #B3261E;
  --bad-bg: #FBE3E1;

  --lv-beginner: #0F7C7E;
  --lv-intermediate: #2F5DA8;
  --lv-advanced: #8E2C5C;

  --sec-cover: #1E2A5A;
  --sec-dialogue: #2F5DA8;
  --sec-pattern: #C2410C;
  --sec-tone: #0F7C7E;
  --sec-template: #8E2C5C;
  --sec-quiz: #A86A00;
  --sec-result: #137A4B;
  --sec-worksheet: #5B3FA0;

  --sp-BOSS: #1E2A5A;
  --sp-STAFF: #0F7C7E;
  --sp-MAN: #2F5DA8;
  --sp-WOMAN: #B03A6F;
  --sp-NARRATOR: #5B5F77;

  --fs-scale: 1;
  --fs-base: clamp(15px, calc(10px + 0.6vw), 24px);
  --radius: 1.4rem;
  --shadow: 0 0.6rem 2rem rgba(30, 42, 90, 0.12);
  --tap: 3.1rem;
}

* { box-sizing: border-box; }
html { font-size: calc(var(--fs-base) * var(--fs-scale)); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", "Heiti TC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.55;
  overscroll-behavior: none;
}
button { font: inherit; color: inherit; cursor: pointer; -webkit-tap-highlight-color: transparent; }
button:focus-visible, [tabindex]:focus-visible { outline: 0.2rem solid var(--gold); outline-offset: 0.15rem; }
[hidden] { display: none !important; }

.en { font-family: "Inter", "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; }
.zh { color: var(--ink-soft); }
.app.hide-zh .zh { display: none !important; }

/* ===== 版面骨架 ===== */
.app {
  height: 100vh; height: 100dvh;
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr) auto auto;
  grid-template-columns: minmax(0, 1fr);
  max-width: 100rem;
  margin: 0 auto;
  position: relative;
}
.app[data-view="home"] .bottombar { display: none; }

/* ===== 頂部列 ===== */
.topbar {
  display: flex; align-items: center; gap: 0.6rem;
  padding: 0.6rem 0.9rem;
  padding-top: calc(0.6rem + env(safe-area-inset-top, 0px));
}
.topbar-title { flex: 1; display: flex; align-items: center; gap: 0.6rem; min-width: 0; font-weight: 800; font-size: 1.15rem; color: var(--navy); }
.topbar-text { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.topbar-actions { display: flex; gap: 0.4rem; }
.brand-mark {
  flex: none; width: 2.2rem; height: 2.2rem; border-radius: 0.7rem;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--phoenix), var(--gold)); color: #fff; font-weight: 900;
  box-shadow: 0 0.2rem 0.6rem rgba(194, 65, 12, 0.35);
}
.btn {
  min-height: var(--tap); min-width: var(--tap);
  display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
  border: 0.12rem solid transparent; border-radius: 1rem;
  padding: 0.4rem 0.9rem; background: var(--card); font-weight: 700;
  touch-action: manipulation; user-select: none;
  transition: transform 0.12s ease, background 0.15s ease, box-shadow 0.15s ease;
}
.btn:active { transform: scale(0.96); }
.btn-ghost { background: rgba(255, 255, 255, 0.7); border-color: var(--line); color: var(--navy); }
.btn-ghost[aria-pressed="false"] { opacity: 0.6; }
.btn-primary { background: var(--phoenix); color: #fff; box-shadow: 0 0.35rem 1rem rgba(194, 65, 12, 0.35); }
.btn-primary:hover { background: #A8370A; }
.btn-secondary { background: var(--navy); color: #fff; }
.btn-lg { min-height: 3.8rem; padding: 0.6rem 1.8rem; font-size: 1.25rem; border-radius: 1.2rem; }
.btn[disabled] { opacity: 0.45; cursor: not-allowed; }

/* ===== 設定／跳頁面板 ===== */
.popover {
  position: absolute; z-index: 30; right: 0.9rem; top: 4.4rem;
  width: min(30rem, calc(100vw - 1.8rem));
  background: var(--card); border: 0.1rem solid var(--line); border-radius: 1.2rem;
  box-shadow: var(--shadow); padding: 1rem;
  max-height: calc(100dvh - 9rem); overflow: auto;
}
.set-row { display: flex; flex-direction: column; gap: 0.35rem; padding: 0.55rem 0; border-bottom: 0.08rem dashed var(--line); }
.set-row:last-child { border-bottom: 0; }
.set-label { font-weight: 800; color: var(--navy); }
.set-label small { font-weight: 500; color: var(--ink-soft); margin-left: 0.4rem; }
.set-row-note { font-size: 0.85rem; color: var(--ink-soft); line-height: 1.5; }
.seg { display: flex; border: 0.12rem solid var(--line); border-radius: 0.9rem; overflow: hidden; background: var(--bg); }
.seg button { flex: 1; min-height: 2.7rem; border: 0; background: transparent; font-weight: 700; padding: 0.3rem 0.5rem; }
.seg button + button { border-left: 0.08rem solid var(--line); }
.seg button[aria-pressed="true"] { background: var(--navy); color: #fff; }

.popover-jump { top: auto; bottom: 5.6rem; left: 50%; right: auto; transform: translateX(-50%); width: min(44rem, calc(100vw - 1.8rem)); }
.jump-group { margin-bottom: 0.9rem; }
.jump-group-title { font-weight: 800; font-size: 0.95rem; margin-bottom: 0.4rem; display: flex; align-items: center; gap: 0.5rem; }
.jump-group-title i { width: 0.8rem; height: 0.8rem; border-radius: 50%; display: inline-block; }
.jump-chips { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.chip {
  min-width: 2.8rem; min-height: 2.8rem; border-radius: 0.8rem; border: 0.12rem solid var(--line);
  background: var(--bg); font-weight: 800; padding: 0 0.6rem;
}
.chip.seen { background: var(--good-bg); border-color: #A6DDBF; }
.chip.current { background: var(--navy); color: #fff; border-color: var(--navy); }

/* ===== 進度條 ===== */
.progress { height: 0.5rem; margin: 0 0.9rem; border-radius: 1rem; background: var(--bg-2); overflow: hidden; cursor: pointer; }
.progress-fill { height: 100%; width: 0; background: linear-gradient(90deg, var(--phoenix), var(--gold)); border-radius: 1rem; transition: width 0.35s ease; }

/* ===== 主舞台與卡片 ===== */
.stage { position: relative; padding: 0.7rem 0.9rem; min-height: 0; touch-action: pan-y; }
.stage:focus, .stage:focus-visible { outline: none; }
.card {
  height: 100%; overflow-y: auto; overflow-x: hidden;
  background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow);
  border: 0.1rem solid rgba(30, 42, 90, 0.06);
  padding: 1.4rem 1.6rem 1.8rem;
  animation: cardIn 0.32s ease both;
  -webkit-overflow-scrolling: touch;
}
.stage[data-dir="back"] .card { animation-name: cardInBack; }
@keyframes cardIn { from { opacity: 0; transform: translateX(2.2rem); } to { opacity: 1; transform: none; } }
@keyframes cardInBack { from { opacity: 0; transform: translateX(-2.2rem); } to { opacity: 1; transform: none; } }

.card-head { display: flex; align-items: center; gap: 0.7rem; flex-wrap: wrap; margin-bottom: 1rem; }
.sec-chip {
  display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.25rem 0.9rem; border-radius: 2rem;
  color: #fff; font-weight: 800; font-size: 0.95rem; background: var(--navy);
}
.card[data-sec="cover"] .sec-chip { background: var(--sec-cover); }
.card[data-sec="dialogue"] .sec-chip { background: var(--sec-dialogue); }
.card[data-sec="pattern"] .sec-chip { background: var(--sec-pattern); }
.card[data-sec="tone"] .sec-chip { background: var(--sec-tone); }
.card[data-sec="template"] .sec-chip { background: var(--sec-template); }
.card[data-sec="quiz"] .sec-chip { background: var(--sec-quiz); }
.card[data-sec="result"] .sec-chip { background: var(--sec-result); }
.card[data-sec="worksheet"] .sec-chip { background: var(--sec-worksheet); }
.card-title { font-size: 1.6rem; font-weight: 900; color: var(--navy); margin: 0; line-height: 1.3; }
.card-sub { margin: 0.2rem 0 0; font-size: 1.05rem; }

/* ===== 朗讀小喇叭 ===== */
.spk {
  flex: none; width: 2.9rem; height: 2.9rem; border-radius: 50%;
  border: 0.12rem solid var(--line); background: var(--bg);
  display: inline-grid; place-items: center; color: var(--navy);
  touch-action: manipulation; transition: background 0.15s, transform 0.12s;
}
.spk svg { width: 1.45rem; height: 1.45rem; fill: currentColor; }
.spk:active { transform: scale(0.92); }
.spk:hover { background: var(--phoenix-soft); }
.spk.playing { background: var(--phoenix); color: #fff; border-color: var(--phoenix); animation: pulse 1s ease-in-out infinite; }
.spk.unsupported { opacity: 0.35; }
@keyframes pulse { 0%, 100% { box-shadow: 0 0 0 0 rgba(194, 65, 12, 0.45); } 50% { box-shadow: 0 0 0 0.55rem rgba(194, 65, 12, 0); } }

/* ===== 首頁 ===== */
.home { height: 100%; overflow-y: auto; padding: 0.2rem 0.1rem 1rem; -webkit-overflow-scrolling: touch; }
.hero {
  border-radius: var(--radius); padding: 1.6rem 1.8rem; color: #fff;
  background: radial-gradient(circle at 85% 20%, rgba(242, 177, 52, 0.45), transparent 45%), linear-gradient(135deg, #1E2A5A, #3B2F7A 60%, #8E2C5C);
  box-shadow: var(--shadow); display: grid; gap: 0.8rem;
}
.hero h1 { margin: 0; font-size: 2rem; line-height: 1.25; }
.hero p { margin: 0; opacity: 0.92; font-size: 1.05rem; }
.hero-stats { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-top: 0.3rem; }
.stat { background: rgba(255, 255, 255, 0.16); border-radius: 1rem; padding: 0.45rem 1rem; font-weight: 700; }
.stat b { font-size: 1.3rem; margin-right: 0.3rem; }
.level { margin-top: 1.6rem; }
.level-head { display: flex; align-items: baseline; gap: 0.8rem; flex-wrap: wrap; margin: 0 0.2rem 0.8rem; }
.level-badge { padding: 0.2rem 1rem; border-radius: 2rem; color: #fff; font-weight: 900; font-size: 1.15rem; }
.level[data-level="beginner"] .level-badge { background: var(--lv-beginner); }
.level[data-level="intermediate"] .level-badge { background: var(--lv-intermediate); }
.level[data-level="advanced"] .level-badge { background: var(--lv-advanced); }
.level-desc { color: var(--ink-soft); font-size: 0.95rem; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr)); gap: 0.9rem; }
.mod {
  position: relative; text-align: left; border: 0.12rem solid var(--line); border-radius: 1.2rem; background: var(--card);
  padding: 1rem 1.1rem 1.1rem; display: grid; gap: 0.45rem; box-shadow: 0 0.3rem 1rem rgba(30, 42, 90, 0.06);
  transition: transform 0.15s ease, box-shadow 0.15s ease; min-height: 11rem;
}
.mod:hover { transform: translateY(-0.2rem); box-shadow: var(--shadow); }
.mod:active { transform: scale(0.98); }
.mod-top { display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; }
.mod-no { font-weight: 900; font-size: 0.95rem; color: #fff; padding: 0.1rem 0.7rem; border-radius: 2rem; }
.level[data-level="beginner"] .mod-no { background: var(--lv-beginner); }
.level[data-level="intermediate"] .mod-no { background: var(--lv-intermediate); }
.level[data-level="advanced"] .mod-no { background: var(--lv-advanced); }
.mod-icon { font-size: 1.7rem; }
.mod-title { font-size: 1.25rem; font-weight: 900; color: var(--navy); line-height: 1.3; }
.mod-en { font-size: 0.9rem; color: var(--ink-soft); margin-top: -0.3rem; }
.mod-tag { font-size: 0.9rem; color: var(--ink-soft); }
.mod-foot { display: flex; align-items: center; gap: 0.6rem; margin-top: auto; }
.bar { flex: 1; height: 0.55rem; background: var(--bg-2); border-radius: 1rem; overflow: hidden; }
.bar > i { display: block; height: 100%; background: linear-gradient(90deg, var(--phoenix), var(--gold)); border-radius: 1rem; }
.pct { font-weight: 900; font-size: 0.95rem; min-width: 2.8rem; text-align: right; }
.badge { font-size: 0.8rem; font-weight: 800; padding: 0.1rem 0.6rem; border-radius: 2rem; border: 0.1rem solid var(--line); background: var(--bg); }
.badge.ready { background: var(--good-bg); color: var(--good); border-color: #A6DDBF; }
.badge.soon { background: var(--phoenix-soft); color: var(--phoenix); border-color: #F6C4A8; }
.mod-quiz { font-size: 0.85rem; color: var(--ink-soft); }

/* ===== 封面 ===== */
.cover { display: grid; gap: 1.2rem; }
.cover-hero { display: flex; gap: 1.2rem; align-items: center; flex-wrap: wrap; }
.cover-icon { font-size: 3.2rem; }
.cover h2 { margin: 0; font-size: 2.2rem; color: var(--navy); line-height: 1.2; }
.cover .en-title { font-size: 1.3rem; color: var(--ink-soft); margin: 0.2rem 0 0; }
.level-pill { display: inline-block; color: #fff; padding: 0.15rem 0.9rem; border-radius: 2rem; font-weight: 800; font-size: 0.95rem; }
.level-pill[data-level="beginner"] { background: var(--lv-beginner); }
.level-pill[data-level="intermediate"] { background: var(--lv-intermediate); }
.level-pill[data-level="advanced"] { background: var(--lv-advanced); }
.box { background: var(--bg); border: 0.1rem solid var(--line); border-radius: 1rem; padding: 1rem 1.2rem; }
.box h3 { margin: 0 0 0.5rem; font-size: 1.1rem; color: var(--navy); }
.box ul { margin: 0; padding-left: 1.3rem; display: grid; gap: 0.35rem; font-size: 1.1rem; }
.start-row { display: flex; gap: 0.8rem; flex-wrap: wrap; align-items: center; }
.start-note { font-size: 0.9rem; color: var(--ink-soft); }
.warn { background: #FFF4D6; border: 0.1rem solid #F2D27A; border-radius: 1rem; padding: 0.7rem 1rem; font-size: 0.95rem; }
.outline-list { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.outline-list span { background: #fff; border: 0.1rem solid var(--line); border-radius: 2rem; padding: 0.15rem 0.8rem; font-size: 0.9rem; font-weight: 700; }

/* ===== 對話 ===== */
.scene { margin: 0 0 1rem; padding: 0.7rem 1rem; background: var(--bg); border-left: 0.35rem solid var(--sec-dialogue); border-radius: 0.6rem; font-size: 1rem; }
.lines { display: grid; gap: 0.8rem; }
.line {
  display: grid; grid-template-columns: auto 1fr auto; gap: 0.9rem; align-items: center;
  padding: 0.8rem 1rem; border-radius: 1.1rem; border: 0.12rem solid var(--line); background: #fff;
  transition: background 0.2s, border-color 0.2s, box-shadow 0.2s;
}
.line.active { background: #FFF8E6; border-color: var(--gold); box-shadow: 0 0 0 0.2rem rgba(242, 177, 52, 0.35); }
.who {
  width: 3.6rem; text-align: center; display: grid; gap: 0.15rem; justify-items: center;
}
.avatar {
  width: 2.8rem; height: 2.8rem; border-radius: 50%; display: grid; place-items: center; color: #fff; font-weight: 900; font-size: 1.1rem;
  background: var(--sp-NARRATOR);
}
.who small { font-size: 0.72rem; font-weight: 800; color: var(--ink-soft); line-height: 1.1; }
.line[data-sp="BOSS"] .avatar { background: var(--sp-BOSS); }
.line[data-sp="STAFF"] .avatar { background: var(--sp-STAFF); }
.line[data-sp="MAN"] .avatar { background: var(--sp-MAN); }
.line[data-sp="WOMAN"] .avatar { background: var(--sp-WOMAN); }
.line[data-sp="NARRATOR"] .avatar { background: var(--sp-NARRATOR); }
.line .en { font-size: 1.45rem; font-weight: 600; line-height: 1.45; }
.line .zh { font-size: 1.1rem; margin-top: 0.15rem; }
.accent-tag { font-size: 0.7rem; font-weight: 800; color: var(--ink-soft); }
.toolbar { display: flex; gap: 0.6rem; flex-wrap: wrap; margin: 0 0 1rem; align-items: center; }

/* ===== 句型 ===== */
.pattern-formula {
  font-size: 2rem; font-weight: 900; color: var(--phoenix); background: var(--phoenix-soft);
  border-radius: 1.1rem; padding: 0.9rem 1.2rem; margin: 0 0 0.9rem; line-height: 1.35;
}
.pattern-label { font-size: 1.2rem; font-weight: 800; color: var(--navy); margin: 0 0 0.4rem; }
.pattern-desc { font-size: 1.1rem; margin: 0 0 1.1rem; }
.examples { display: grid; gap: 0.7rem; }
.ex { display: grid; grid-template-columns: 1fr auto; gap: 0.8rem; align-items: center; padding: 0.8rem 1rem; border: 0.12rem solid var(--line); border-radius: 1rem; }
.ex .en { font-size: 1.4rem; font-weight: 600; }
.ex .zh { font-size: 1.05rem; margin-top: 0.1rem; }
.ex-no { font-size: 0.8rem; font-weight: 900; color: var(--phoenix); }

/* ===== 語氣切換卡 ===== */
.situation { font-size: 1.25rem; font-weight: 800; color: var(--navy); margin: 0 0 0.9rem; }
.tone-tabs { display: none; margin-bottom: 0.8rem; }
.tone-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.9rem; }
.tone[data-tone="formal"] { --tc: #1E2A5A; --tcbg: #E8EBF7; }
.tone[data-tone="neutral"] { --tc: #0F7C7E; --tcbg: #DEF3F3; }
.tone[data-tone="casual"] { --tc: #B8470B; --tcbg: #FDE7D9; }
.tone { border: 0.14rem solid var(--tc); border-radius: 1.1rem; background: var(--tcbg); padding: 0.9rem 1rem; display: grid; gap: 0.5rem; align-content: start; }
.tone-head { display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; }
.tone-name { font-weight: 900; color: var(--tc); font-size: 1.1rem; }
.tone .en { font-size: 1.3rem; font-weight: 600; }
.tone .zh { font-size: 1.05rem; }
.tone-grid.tabs { grid-template-columns: 1fr; }
.tone-grid.tabs .tone { display: none; }
.tone-grid.tabs .tone.on { display: grid; }
.seg.tone-tabs.on { display: flex; margin-bottom: 0.8rem; }

/* ===== 範本 ===== */
.tpl-meta { margin: 0 0 0.8rem; font-size: 1.05rem; }
.mail { border: 0.14rem solid var(--line); border-radius: 1.1rem; overflow: hidden; background: #fff; }
.mail-row { display: grid; grid-template-columns: auto 1fr auto; gap: 0.8rem; align-items: center; padding: 0.7rem 1rem; border-bottom: 0.1rem solid var(--line); background: var(--bg); }
.mail-k { font-weight: 900; color: var(--sec-template); }
.mail-v { font-weight: 800; font-size: 1.25rem; }
.para { display: grid; grid-template-columns: 1fr auto; gap: 0.8rem; align-items: start; padding: 0.7rem 1rem; border-bottom: 0.08rem dashed var(--line); }
.para:last-child { border-bottom: 0; }
.para .en { font-size: 1.3rem; white-space: pre-line; }
.para .zh { font-size: 1.05rem; margin-top: 0.15rem; white-space: pre-line; }
.copy-row { display: flex; gap: 0.7rem; flex-wrap: wrap; margin-top: 1rem; }
.btn-copy { background: var(--sec-template); color: #fff; box-shadow: 0 0.35rem 1rem rgba(142, 44, 92, 0.3); }
.btn-copy.done { background: var(--good); }

/* ===== 小測驗 ===== */
.q-no { font-weight: 900; color: var(--sec-quiz); font-size: 1.05rem; }
.q-text { display: grid; grid-template-columns: 1fr auto; gap: 0.8rem; align-items: start; margin: 0.4rem 0 1rem; }
.q-text .en { font-size: 1.55rem; font-weight: 700; line-height: 1.4; }
.q-text .zh { font-size: 1.1rem; margin-top: 0.2rem; }
.opts { display: grid; gap: 0.7rem; }
.opt { display: grid; grid-template-columns: 1fr auto; gap: 0.6rem; align-items: center; }
.opt-main {
  display: flex; align-items: center; gap: 0.9rem; text-align: left; min-height: 3.8rem; padding: 0.6rem 1rem;
  border: 0.14rem solid var(--line); border-radius: 1.1rem; background: #fff; font-size: 1.3rem; font-weight: 600; width: 100%;
}
.opt-main:hover:not([disabled]) { border-color: var(--navy); background: #F4F6FD; }
.opt-letter { flex: none; width: 2.2rem; height: 2.2rem; border-radius: 50%; display: grid; place-items: center; background: var(--bg-2); font-weight: 900; font-size: 1rem; }
.opt.correct .opt-main { background: var(--good-bg); border-color: var(--good); }
.opt.correct .opt-letter { background: var(--good); color: #fff; }
.opt.wrong .opt-main { background: var(--bad-bg); border-color: var(--bad); }
.opt.wrong .opt-letter { background: var(--bad); color: #fff; }
.opt-main[disabled] { cursor: default; opacity: 1; }
.explain { margin-top: 1rem; padding: 1rem 1.2rem; border-radius: 1rem; font-size: 1.1rem; border: 0.14rem solid var(--line); background: var(--bg); }
.explain.ok { background: var(--good-bg); border-color: var(--good); }
.explain.no { background: var(--bad-bg); border-color: var(--bad); }
.explain b { display: block; font-size: 1.2rem; margin-bottom: 0.2rem; }

/* ===== 成績 ===== */
.score-wrap { display: grid; gap: 1rem; justify-items: center; text-align: center; padding: 0.6rem 0; }
.score-ring { width: 11rem; height: 11rem; border-radius: 50%; display: grid; place-items: center; background: conic-gradient(var(--good) calc(var(--p) * 1%), var(--bg-2) 0); }
.score-ring > div { width: 8.6rem; height: 8.6rem; border-radius: 50%; background: #fff; display: grid; place-items: center; font-size: 2.6rem; font-weight: 900; color: var(--navy); line-height: 1; }
.score-ring small { font-size: 1rem; font-weight: 700; color: var(--ink-soft); display: block; }
.score-msg { font-size: 1.5rem; font-weight: 900; color: var(--navy); }
.recap { width: 100%; display: grid; gap: 0.5rem; text-align: left; }
.recap-item { display: flex; gap: 0.7rem; align-items: center; padding: 0.6rem 0.9rem; border-radius: 0.9rem; border: 0.1rem solid var(--line); font-size: 1.05rem; }
.recap-item.ok { background: var(--good-bg); }
.recap-item.no { background: var(--bad-bg); }
.recap-item .mark { font-weight: 900; }
.recap-item button { margin-left: auto; }

/* ===== 底部導覽 ===== */
.bottombar {
  display: grid; grid-template-columns: 1fr minmax(8rem, 14rem) 1fr; gap: 0.7rem; align-items: center;
  padding: 0.5rem 0.9rem; padding-bottom: calc(0.5rem + env(safe-area-inset-bottom, 0px));
}
.btn-nav { min-height: 3.6rem; font-size: 1.15rem; background: var(--navy); color: #fff; border-radius: 1.2rem; box-shadow: 0 0.3rem 1rem rgba(30, 42, 90, 0.25); }
.btn-nav.btn-next { background: var(--phoenix); }
.btn-nav[disabled] { opacity: 0.35; box-shadow: none; }
.btn-jump { min-height: 3.6rem; flex-direction: column; gap: 0; border-color: var(--line); font-size: 1.15rem; border-radius: 1.2rem; line-height: 1.2; }
.jump-sub { font-size: 0.75rem; font-weight: 700; color: var(--ink-soft); }

.footer { text-align: center; font-size: 0.8rem; color: var(--ink-soft); padding: 0.2rem 0.8rem calc(0.4rem + env(safe-area-inset-bottom, 0px)); }
.app[data-view="module"] .footer { padding-top: 0; }

/* ===== Toast ===== */
.toast {
  position: fixed; left: 50%; bottom: 6.5rem; transform: translate(-50%, 1rem); opacity: 0; pointer-events: none; z-index: 60;
  background: var(--ink); color: #fff; padding: 0.7rem 1.4rem; border-radius: 2rem; font-weight: 800; font-size: 1.05rem;
  transition: opacity 0.2s, transform 0.2s; max-width: calc(100vw - 2rem); text-align: center;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ===== 藍圖預覽（尚未製作的模組） ===== */
.bp-grid { display: grid; gap: 1rem; grid-template-columns: repeat(2, 1fr); }
.bp-grid .full { grid-column: 1 / -1; }
.bp-ex { display: grid; gap: 0.5rem; }
.bp-ex .item { display: grid; grid-template-columns: 1fr auto; gap: 0.6rem; align-items: center; padding: 0.5rem 0.7rem; background: #fff; border: 0.1rem solid var(--line); border-radius: 0.9rem; }
.bp-ex .en { font-size: 1.2rem; font-weight: 600; }
.bp-ex .zh { font-size: 1rem; }


/* ===== 首頁：學習優勢 ===== */
.features-wrap { margin-top: 1.6rem; }
.features-title { margin: 0 0.2rem 0.8rem; font-size: 1.4rem; color: var(--navy); }
.features { display: grid; grid-template-columns: repeat(auto-fill, minmax(19rem, 1fr)); gap: 0.8rem; }
.feature { display: flex; gap: 0.8rem; align-items: flex-start; background: var(--card); border: 0.12rem solid var(--line); border-radius: 1.1rem; padding: 0.9rem 1rem; }
.feature.hl { border-color: var(--sec-worksheet); background: linear-gradient(135deg, #F4EFFC, #fff 70%); box-shadow: 0 0.3rem 1rem rgba(91, 63, 160, 0.15); grid-column: span 2; }
.feature-icon { flex: none; font-size: 1.8rem; line-height: 1.2; }
.feature-title { font-weight: 900; color: var(--navy); font-size: 1.08rem; display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
.feature-badge { font-size: 0.75rem; font-weight: 900; color: #fff; background: var(--sec-worksheet); padding: 0.05rem 0.6rem; border-radius: 2rem; }
.feature-desc { color: var(--ink-soft); font-size: 0.95rem; margin-top: 0.15rem; }
@media (max-width: 900px) { .feature.hl { grid-column: auto; } }

/* ===== 學習單頁（螢幕預覽）===== */
.ws-box ul { font-size: 1.05rem; }
.ws-preview { margin-top: 1rem; padding: 0.8rem; border: 0.12rem dashed var(--line); border-radius: 1rem; background: #fff; overflow-x: auto; }

/* ===== 學習單本體（螢幕預覽與列印共用）===== */
#printRoot { display: none; }
.ws { color: #000; font-size: 10.5pt; line-height: 1.5; font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif; background: #fff; }
.ws * { box-sizing: border-box; }
.ws .en { font-family: "Inter", "Segoe UI", Roboto, Arial, sans-serif; }
.ws-header { border-bottom: 2pt solid #000; padding-bottom: 6pt; margin-bottom: 8pt; }
.ws-brand { display: flex; align-items: center; gap: 6pt; font-size: 9pt; font-weight: 700; }
.ws-mark { display: inline-grid; place-items: center; width: 15pt; height: 15pt; border-radius: 4pt; background: #000; color: #fff; font-weight: 900; font-size: 9pt; }
.ws-title { margin: 6pt 0 0; font-size: 17pt; line-height: 1.25; }
.ws-sub { font-size: 10pt; color: #333; }
.ws-id { display: flex; justify-content: space-between; gap: 10pt; margin-top: 8pt; font-size: 10.5pt; }
.ws-intro { margin: 6pt 0 0; font-size: 9.5pt; color: #222; }
.ws-part { margin-top: 10pt; }
.ws-part-head { display: flex; align-items: baseline; gap: 8pt; background: #000; color: #fff; padding: 3pt 8pt; border-radius: 3pt; margin-bottom: 6pt; }
.ws-part-no { font-weight: 900; font-size: 13pt; }
.ws-part-title { font-weight: 900; font-size: 12pt; }
.ws-part-en { font-size: 9pt; opacity: 0.85; margin-left: auto; }
.ws-task { margin: 0 0 9pt; }
.ws-task-title { margin: 0 0 3pt; font-size: 11pt; }
.ws-task-no { display: inline-block; min-width: 20pt; padding: 0 4pt; border: 1pt solid #000; border-radius: 3pt; text-align: center; font-size: 9.5pt; }
.ws-inst { margin: 2pt 0 4pt; }
.ws-tip { margin: 3pt 0 0; font-size: 9.5pt; color: #222; }
.ws-readlist { margin: 3pt 0 4pt; padding-left: 18pt; font-size: 11pt; }
.ws-readlist li { margin-bottom: 2pt; }
.ws-check { display: flex; flex-wrap: wrap; gap: 4pt 14pt; font-size: 9.5pt; margin-top: 3pt; }
.ws-check-one { margin: 4pt 0 0; font-size: 9.5pt; }
.ws-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 6pt; margin: 3pt 0; }
.ws-card { border: 1pt solid #000; border-radius: 4pt; padding: 4pt 6pt; font-size: 10pt; }
.ws-card p { margin: 2pt 0 0; }
.ws-phrases { margin-top: 3pt; font-size: 10pt; }
.ws-phrases ul { margin: 2pt 0 0; padding-left: 16pt; }
.ws-prompt { font-weight: 700; font-size: 11.5pt; border-left: 3pt solid #000; padding-left: 6pt; margin: 3pt 0; }
.ws-checklist { display: grid; gap: 1.5pt; font-size: 10pt; margin: 3pt 0; }
.ws-qa { margin: 4pt 0 6pt; }
.ws-given { font-weight: 600; }
.ws-ctx { font-size: 9.5pt; color: #222; }
.ws-lines { margin-top: 2pt; }
.ws-line { height: 16pt; border-bottom: 0.6pt solid #000; }
.ws-inline { display: inline-block; width: 78%; height: 13pt; vertical-align: bottom; }
.ws-subject-row { margin: 4pt 0; }
.ws-table { width: 100%; border-collapse: collapse; font-size: 9.5pt; margin: 3pt 0 6pt; }
.ws-table th, .ws-table td { border: 0.6pt solid #000; padding: 2pt 4pt; text-align: left; vertical-align: top; }
.ws-table th { background: #e8e8e8; }
.ws-w { font-weight: 700; white-space: nowrap; }
.ws-pos { white-space: nowrap; color: #333; }
.ws-exzh { color: #333; font-size: 9pt; }
.ws-match { display: grid; grid-template-columns: 1fr 1fr; gap: 14pt; margin: 3pt 0; }
.ws-match-row { display: flex; gap: 6pt; align-items: baseline; padding: 1.5pt 0; }
.ws-blank { display: inline-block; min-width: 20pt; border-bottom: 0.8pt solid #000; text-align: center; font-weight: 700; }
.ws-bank { display: flex; flex-wrap: wrap; gap: 4pt 10pt; border: 1pt solid #000; border-radius: 4pt; padding: 3pt 8pt; margin: 3pt 0 5pt; font-weight: 700; }
.ws-fill { margin: 2.5pt 0; }
.ws-blank-inline { display: inline-block; min-width: 70pt; border-bottom: 0.8pt solid #000; text-align: center; margin: 0 2pt; }
.ws-score { display: flex; flex-wrap: wrap; gap: 4pt 16pt; margin-top: 10pt; padding: 5pt 8pt; border: 1.2pt solid #000; border-radius: 4pt; font-size: 10pt; }
.ws-model { margin: 2pt 0; padding: 2pt 6pt; border-left: 3pt solid #000; background: #eee; font-size: 10pt; }
.ws-model .en, .ws-model span { font-family: "Inter", "Segoe UI", Roboto, Arial, sans-serif; }
.ws-model-mail { padding: 5pt 8pt; }
.ws-subject { font-weight: 700; margin: 2pt 0 4pt; }
.ws-mailbody { white-space: pre-line; }
.ws-ans { font-weight: 700; background: #eee; }
.ws-rubric td { height: 20pt; }
.ws-footer { margin-top: 12pt; padding-top: 4pt; border-top: 0.6pt solid #000; font-size: 8pt; color: #333; text-align: center; }

/* ===== 響應式 ===== */
@media (max-width: 900px) {
  .tone-grid { grid-template-columns: 1fr; }
  .bp-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  :root { --fs-base: 16px; --radius: 1.1rem; }
  .topbar .lbl { display: none; }
  .card { padding: 1rem 1rem 1.4rem; }
  .card-title { font-size: 1.35rem; }
  .hero h1 { font-size: 1.6rem; }
  .cover h2 { font-size: 1.7rem; }
  .line { grid-template-columns: 1fr auto; padding: 0.7rem 0.8rem; }
  .line .who { grid-column: 1 / -1; width: auto; grid-template-columns: auto 1fr; justify-items: start; align-items: center; gap: 0.5rem; }
  .line .who .avatar { width: 2rem; height: 2rem; font-size: 0.9rem; }
  .line .en { font-size: 1.2rem; }
  .pattern-formula { font-size: 1.4rem; }
  .ex .en, .tone .en, .para .en { font-size: 1.15rem; }
  .q-text .en { font-size: 1.3rem; }
  .opt-main { font-size: 1.1rem; }
  .btn-nav .lbl { display: none; }
  .bottombar { grid-template-columns: 4rem 1fr 4rem; }
  .popover { right: 0.5rem; }
  .mail-row { grid-template-columns: 1fr auto; }
  .mail-k { grid-column: 1 / -1; }
}
@media (min-width: 1700px) {
  .app { max-width: 130rem; }
}
/* 86 吋 4K 電子白板：視窗很寬時自動放大基準字級 */
@media (min-width: 2400px) {
  :root { --fs-base: 1.05vw; }
  .app { max-width: none; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
@media print {
  .topbar, .bottombar, .progress, .popover, .toast { display: none !important; }
  .app { height: auto; display: block; }
  .card { box-shadow: none; overflow: visible; }
}

/* ===== 列印學習單（另存為 PDF）===== */
@page { size: A4; margin: 13mm; }
@media print {
  body.printing { background: #fff; }
  body.printing .app, body.printing .toast, body.printing .popover { display: none !important; }
  body.printing #printRoot { display: block; }
  body.printing .ws { font-size: 10.5pt; }
  .ws-break { break-before: page; }
  .ws-task, .ws-card, .ws-qa, .ws-table tr, .ws-model { break-inside: avoid; }
  .ws-part-head { break-after: avoid; }
  .ws-part-head, .ws-table th, .ws-mark, .ws-model, .ws-ans { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
}