:root {
  --paper: #F4F5EF;
  --surface: #FBFBF7;
  --ink: #25304A;
  --muted: #5D6475;
  --line: #DCDFD3;
  --madder: #A4485C;
  --madder-soft: #F3E6E7;
  --leaf: #4A6E4D;
  --leaf-soft: #E7EEE3;
  --gold: #A8761F;
  --gold-soft: #F6ECD6;
  --on-accent: #FFFFFF;
  --art-filter: none;
  --kai: "LXGW WenKai TC", "BiauKai", "DFKai-SB", "標楷體", serif;
  --sans: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", "微軟正黑體", sans-serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #171B24; --surface: #1F2430; --ink: #E6E8EE; --muted: #A3A9B7; --line: #343A48;
    --madder: #E28C9E; --madder-soft: #33242B; --leaf: #92BB93; --leaf-soft: #1F2B22;
    --gold: #E2B45C; --gold-soft: #2E2819; --on-accent: #1A1D26; --art-filter: brightness(.9) saturate(.95);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --paper: #171B24; --surface: #1F2430; --ink: #E6E8EE; --muted: #A3A9B7; --line: #343A48;
  --madder: #E28C9E; --madder-soft: #33242B; --leaf: #92BB93; --leaf-soft: #1F2B22;
  --gold: #E2B45C; --gold-soft: #2E2819; --on-accent: #1A1D26; --art-filter: brightness(.9) saturate(.95);
  color-scheme: dark;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); font-size: 16px; line-height: 1.85; letter-spacing: .01em; }
img { max-width: 100%; }
[hidden] { display: none !important; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--madder); outline-offset: 3px; border-radius: 4px; }
h1, h2, h3 { font-family: var(--kai); font-weight: 700; text-wrap: balance; margin: 0; line-height: 1.35; }
p { margin: 0; }
ul, ol { margin: 0; }
button { font: inherit; color: inherit; }
.label { font-size: 12.5px; font-weight: 700; letter-spacing: .14em; color: var(--muted); }

/* 水彩畫框 */
.art { background: #FBF6EA; border-radius: 14px; overflow: hidden; aspect-ratio: 16 / 9; filter: var(--art-filter); }
.art svg { display: block; width: 100%; height: 100%; }
.art svg g > * { mix-blend-mode: multiply; }
.art svg .nb { mix-blend-mode: normal; }
.art .grain { mix-blend-mode: multiply; opacity: .4; }

/* 頂部導覽 */
.topbar { position: sticky; top: 0; z-index: 20; background: var(--paper); border-bottom: 1px solid var(--line); }
.topbar-in { max-width: 1180px; margin: 0 auto; padding: 10px 24px; display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.brand { font-family: var(--kai); font-weight: 700; font-size: 20px; text-decoration: none; margin-right: auto; }
.topnav { display: flex; gap: 4px; flex-wrap: wrap; }
.topnav a { text-decoration: none; font-size: 15px; padding: 5px 12px; border-radius: 999px; color: var(--muted); }
.topnav a:hover { color: var(--ink); background: var(--surface); }
.topnav a[aria-current="page"] { color: var(--ink); background: var(--surface); box-shadow: inset 0 0 0 1px var(--line); }

.wrap { max-width: 1180px; margin: 0 auto; padding: 40px 24px 72px; }
.col { max-width: 68ch; }
.footer { max-width: 1180px; margin: 0 auto; padding: 20px 24px 40px; border-top: 1px solid var(--line); font-size: 13.5px; color: var(--muted); }

/* 按鈕 */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 20px; border-radius: 999px; border: 1px solid var(--line); background: var(--surface); text-decoration: none; font-size: 15.5px; font-weight: 500; cursor: pointer; }
.btn:hover { border-color: var(--muted); }
.btn.primary { background: var(--madder); border-color: var(--madder); color: var(--on-accent); }
.btn.primary:hover { filter: brightness(1.06); }

/* 首頁 */
.hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); gap: 48px; align-items: center; }
.hero-text { display: flex; flex-direction: column; gap: 18px; }
.hero h1 { font-size: 48px; letter-spacing: .02em; }
.hero .lede { font-size: 17.5px; color: var(--muted); }
.hero .actions { display: flex; gap: 10px; flex-wrap: wrap; padding-top: 6px; }
.notice { background: var(--gold-soft); border-radius: 10px; padding: 14px 18px; font-size: 15px; }
.notice strong { color: var(--gold); }

.edition-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; font-size: 15px; color: var(--muted); }
.book-switch { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 18px; }
.book-group { display: inline-flex; align-items: center; gap: 8px; }
.book-subject { font-family: var(--kai); font-size: 17px; font-weight: 700; color: var(--ink); }
.edition-switch { display: inline-flex; padding: 3px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); }
.edition-switch button { border: 0; background: transparent; padding: 5px 16px; border-radius: 999px; font-size: 15px; font-weight: 500; color: var(--muted); cursor: pointer; }
.edition-switch button:hover { color: var(--ink); }
.edition-switch button[aria-pressed="true"] { background: var(--madder); color: var(--on-accent); }
.home-section .sec-head h2 { font-size: 30px; }
#units { scroll-margin-top: 110px; }

.home-section { display: flex; flex-direction: column; gap: 20px; margin-top: 72px; }
.home-section > h2 { font-size: 30px; }
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; list-style: none; padding: 0; counter-reset: step; }
.steps li { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 16px 18px; display: flex; flex-direction: column; gap: 4px; font-size: 15px; counter-increment: step; }
.steps li::before { content: "第 " counter(step) " 步"; font-size: 12.5px; font-weight: 700; letter-spacing: .14em; color: var(--madder); }
.steps b { font-family: var(--kai); font-size: 20px; }

.unit-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.ucard { display: flex; flex-direction: column; text-decoration: none; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; transition: transform .2s ease, border-color .2s ease; }
.ucard:hover { transform: translateY(-2px); border-color: var(--muted); }
.ucard .art { border-radius: 0; aspect-ratio: 16 / 10; }
.ucard-body { padding: 14px 18px 16px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.ucard-title { display: flex; align-items: baseline; gap: 10px; }
.ucard-title b { font-family: var(--kai); font-size: 28px; color: var(--madder); line-height: 1; }
.ucard-title span { font-family: var(--kai); font-size: 21px; font-weight: 700; }
.ucard-secs { font-size: 13.5px; color: var(--muted); line-height: 1.6; }
.progress { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--muted); margin-top: auto; padding-top: 6px; font-variant-numeric: tabular-nums; }
.bar { flex: 1; height: 5px; border-radius: 9px; background: var(--line); overflow: hidden; }
.bar i { display: block; height: 100%; background: var(--leaf); border-radius: 9px; }
.pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.pcard { display: grid; grid-template-columns: 160px 1fr; gap: 18px; align-items: center; text-decoration: none; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 12px; }
.pcard:hover { border-color: var(--muted); }
.pcard .art { border-radius: 8px; aspect-ratio: 4 / 3; }
.pcard h3 { font-size: 22px; }
.pcard p { font-size: 14.5px; color: var(--muted); }

/* 內頁 */
.page { display: grid; grid-template-columns: 210px minmax(0, 1fr); gap: 48px; }
.side { position: sticky; top: 76px; align-self: start; display: flex; flex-direction: column; gap: 10px; }
.side ol { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 1px; }
.side a { display: grid; grid-template-columns: 24px 1fr 10px; align-items: center; gap: 4px; text-decoration: none; padding: 5px 8px; border-radius: 6px; font-size: 14.5px; color: var(--muted); }
.side a:hover { background: var(--surface); color: var(--ink); }
.side a[aria-current="page"] { background: var(--surface); color: var(--ink); font-weight: 500; box-shadow: inset 0 0 0 1px var(--line); }
.side a b { font-family: var(--kai); color: var(--madder); font-size: 16px; }
.side a.plain { grid-template-columns: 1fr; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--line); }
.dot.some { background: var(--gold); }
.dot.all { background: var(--leaf); }

.content { display: flex; flex-direction: column; gap: 40px; min-width: 0; }
.content > .art { aspect-ratio: 21 / 9; }
.crumb { font-size: 14px; color: var(--muted); }
.crumb a { text-decoration: none; }
.crumb a:hover { text-decoration: underline; }
.page-title { font-size: 38px; }
.uhead { display: grid; grid-template-columns: auto 1fr; gap: 4px 20px; align-items: end; }
.uhead .no { font-family: var(--kai); font-size: 72px; line-height: .9; color: var(--madder); font-weight: 700; grid-row: span 2; }
.uhead h1 { font-size: 38px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chips span { font-size: 13px; padding: 1px 10px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); background: var(--surface); font-variant-numeric: tabular-nums; }
.image-line { font-size: 17px; }
.image-line em { font-style: normal; font-family: var(--kai); font-size: 21px; color: var(--madder); }

.sec { display: flex; flex-direction: column; gap: 14px; }
.sec > h2, .sec-head h2 { font-size: 25px; }
.sec-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.sec-note { font-size: 15px; color: var(--muted); }

.story { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 22px 26px; display: flex; flex-direction: column; gap: 12px; }
.story p { font-family: var(--kai); font-size: 20px; line-height: 1.95; }
.story .ask { font-family: var(--sans); font-size: 15px; color: var(--muted); padding-top: 10px; border-top: 1px dashed var(--line); }
.story .ask strong { color: var(--madder); font-weight: 500; }

.week { list-style: none; padding: 0; border-top: 1px solid var(--line); }
.week li { display: grid; grid-template-columns: 62px 66px 1fr; gap: 12px; align-items: baseline; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 15.5px; }
.week .day { font-family: var(--kai); font-size: 18px; font-weight: 700; }
.stage { font-size: 12.5px; font-weight: 700; letter-spacing: .08em; padding: 1px 0; text-align: center; border-radius: 999px; border: 1px solid currentColor; }
.stage.s1 { color: var(--gold); }
.stage.s2 { color: var(--madder); }
.stage.s3 { color: var(--ink); }
.stage.s4 { color: var(--leaf); }

.checklist { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.checklist label { display: grid; grid-template-columns: 26px 1fr; gap: 10px; align-items: start; padding: 12px 16px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); cursor: pointer; font-size: 15.5px; }
.checklist input { appearance: none; width: 22px; height: 22px; margin: 3px 0 0; border: 2px solid var(--muted); border-radius: 6px; display: grid; place-items: center; cursor: pointer; background: transparent; }
.checklist input:checked { background: var(--leaf); border-color: var(--leaf); }
.checklist input:checked::after { content: ""; width: 6px; height: 11px; border: solid var(--on-accent); border-width: 0 2.5px 2.5px 0; transform: translateY(-1px) rotate(45deg); }
.checklist label:has(input:checked) .act-t { text-decoration: line-through; text-decoration-color: var(--leaf); color: var(--muted); }
.act-t { font-weight: 700; }
.count { font-size: 14px; color: var(--muted); font-variant-numeric: tabular-nums; }

.two { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 22px; }
.panel { border: 1px solid var(--line); border-radius: 12px; padding: 16px 20px; display: flex; flex-direction: column; gap: 8px; }
.panel ul { padding-left: 1.2em; font-size: 15px; display: flex; flex-direction: column; gap: 3px; }
.panel p { font-size: 15.5px; }

.bridge { background: var(--leaf-soft); border-radius: 12px; padding: 18px 24px; display: flex; flex-direction: column; gap: 8px; }
.bridge .label { color: var(--leaf); }
.bridge ul { padding-left: 1.2em; display: flex; flex-direction: column; gap: 5px; font-size: 15.5px; }
.watch { background: var(--madder-soft); border-radius: 8px; padding: 10px 14px; font-size: 15px; margin-top: 4px; }
.watch strong { color: var(--madder); }

.tablewrap { overflow-x: auto; }
table.nums { border-collapse: collapse; width: 100%; font-size: 15px; min-width: 460px; }
table.nums th { text-align: left; font-weight: 700; font-size: 12.5px; letter-spacing: .12em; color: var(--muted); padding: 6px 10px; border-bottom: 1px solid var(--line); }
table.nums td { padding: 7px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.nums td:first-child { font-family: var(--kai); font-size: 22px; color: var(--madder); width: 44px; text-align: center; }

.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding-top: 12px; }
.pager a { display: flex; flex-direction: column; gap: 2px; text-decoration: none; border: 1px solid var(--line); border-radius: 12px; padding: 14px 18px; background: var(--surface); }
.pager a:hover { border-color: var(--muted); }
.pager a.next { text-align: right; grid-column: 2; }
.pager span { font-size: 13px; color: var(--muted); }
.pager b { font-family: var(--kai); font-size: 20px; }

.rhythm { list-style: none; padding: 0; border-top: 1px solid var(--line); }
.rhythm li { display: grid; grid-template-columns: 64px 1fr; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 15.5px; }
.rhythm .min { font-variant-numeric: tabular-nums; color: var(--gold); font-weight: 700; font-size: 14px; }
.three { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.three div { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; display: flex; flex-direction: column; gap: 4px; font-size: 15px; }
.three b { font-family: var(--kai); font-size: 20px; color: var(--madder); }
.verse { font-family: var(--kai); font-size: 20px; line-height: 1.9; background: var(--madder-soft); padding: 20px 26px; border-radius: 12px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 28px; }
.chant { background: var(--gold-soft); border-radius: 12px; padding: 18px 24px; display: flex; flex-direction: column; }
.chant-title { font-family: var(--kai); font-size: 22px; font-weight: 700; color: var(--gold); margin-bottom: 8px; }
.chant-line { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 2px 20px; align-items: baseline; padding: 6px 0; border-top: 1px dashed var(--line); }
.chant-text { font-family: var(--kai); font-size: 21px; line-height: 1.7; }
.chant-move { font-size: 14.5px; color: var(--muted); }
.sm-verse { text-align: center; line-height: 2; }
.tips { display: flex; flex-direction: column; gap: 14px; list-style: none; padding: 0; }
.tips li { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 16px 20px; display: flex; flex-direction: column; gap: 2px; font-size: 15.5px; }
.tips b { font-family: var(--kai); font-size: 20px; }
.source { font-size: 13.5px; color: var(--muted); }

/* 說故事模式 */
.storymode { position: fixed; inset: 0; z-index: 50; background: var(--paper); display: flex; flex-direction: column; }
.sm-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 24px; border-bottom: 1px solid var(--line); }
.sm-top .label { font-size: 13px; }
.sm-body { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 28px; padding: 24px; overflow: auto; cursor: pointer; }
.sm-body .art { width: min(760px, 100%); aspect-ratio: 21 / 9; flex-shrink: 0; }
.sm-text { font-family: var(--kai); font-size: clamp(22px, 3.1vw, 34px); line-height: 1.9; max-width: 28em; text-wrap: pretty; }
.sm-ask { display: flex; flex-direction: column; gap: 10px; align-items: center; text-align: center; }
.sm-ask .label { color: var(--madder); }
.sm-bottom { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 24px 20px; }
.sm-dots { display: flex; gap: 8px; justify-content: center; }
.sm-dots i { width: 9px; height: 9px; border-radius: 50%; background: var(--line); }
.sm-dots i.on { background: var(--madder); }
.sm-hint { font-size: 13px; color: var(--muted); text-align: center; }
.sm-bottom .btn[disabled] { visibility: hidden; }

@media (prefers-reduced-motion: reduce) {
  .ucard { transition: none; }
  .ucard:hover { transform: none; }
}

@media (max-width: 1000px) {
  .page { grid-template-columns: minmax(0, 1fr); }
  .side { display: none; }
  .unit-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; gap: 24px; }
  .hero h1 { font-size: 36px; }
  .steps, .three, .two, .pair { grid-template-columns: 1fr; }
  .unit-grid { grid-template-columns: 1fr; }
  .uhead .no { font-size: 52px; }
  .uhead h1, .page-title { font-size: 30px; }
  .content > .art { aspect-ratio: 16 / 9; }
  .verse { grid-template-columns: 1fr; }
  .chant-line { grid-template-columns: 1fr; }
  .week li { grid-template-columns: 52px 60px 1fr; font-size: 15px; }
  .pcard { grid-template-columns: 110px 1fr; }
  .wrap { padding-top: 24px; }
  .sm-hint { display: none; }
}

@media print {
  .topbar, .side, .pager, .btn, .storymode, .footer { display: none !important; }
  .page { grid-template-columns: minmax(0, 1fr); }
  .story, .bridge, .panel, .week li { break-inside: avoid; }
}