/* N3 每日短文：全站共用樣式 */
:root {
  --bg: #f4f6f9; --surface: #ffffff; --fg: #1b2330; --muted: #5b6678; --line: #dde2ea;
  --accent: #2f4b8a; --accent-soft: #e4eaf6; --grammar: #17766a; --grammar-soft: #dcf1ed;
  --warm: #b4532a; --ok: #17766a; --bad: #b3372f;
  --font-serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --font-sans: "Noto Sans JP", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #11161f; --surface: #1a212d; --fg: #e8ecf3; --muted: #9aa5b8; --line: #2b3444;
    --accent: #8fa9e6; --accent-soft: #24304a; --grammar: #5cc5b4; --grammar-soft: #17353a;
    --warm: #e6966e; --ok: #5cc5b4; --bad: #ef8a82; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #11161f; --surface: #1a212d; --fg: #e8ecf3; --muted: #9aa5b8; --line: #2b3444;
  --accent: #8fa9e6; --accent-soft: #24304a; --grammar: #5cc5b4; --grammar-soft: #17353a;
  --warm: #e6966e; --ok: #5cc5b4; --bad: #ef8a82; color-scheme: dark;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font-family: var(--font-sans); font-size: 16px; line-height: 1.7;
  padding: 24px max(16px, env(safe-area-inset-right)) 56px max(16px, env(safe-area-inset-left));
}
main { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 28px; }
h1, h2, h3 { text-wrap: balance; line-height: 1.35; margin: 0; }
h2 { font-size: 1.15rem; display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
h2 small { font-size: .78rem; font-weight: 400; color: var(--muted); }
p { margin: 0; }
a { color: var(--accent); }
button { font: inherit; cursor: pointer; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* 頂部導覽 */
.nav { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.brand { font-family: var(--font-serif); font-weight: 700; color: var(--fg); text-decoration: none; font-size: 1.05rem; }
.navlinks { display: flex; gap: 8px; flex-wrap: wrap; }
.pill {
  display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--line); background: var(--surface);
  color: var(--accent); text-decoration: none; font-size: .88rem; font-weight: 500; line-height: 1.4;
  padding: 6px 14px; border-radius: 999px;
}
.pill:hover { border-color: var(--accent); }
.pill[aria-pressed="true"], .pill.on { background: var(--accent); border-color: var(--accent); color: var(--bg); }

/* 標題區 */
header.hero { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; flex-wrap: wrap; }
.eyebrow { font-size: .78rem; letter-spacing: .08em; color: var(--muted); }
header.hero h1 { font-family: var(--font-serif); font-size: 1.9rem; margin-top: 4px; }
.count { text-align: right; font-variant-numeric: tabular-nums; }
.count b { font-family: var(--font-serif); font-size: 2.4rem; color: var(--accent); line-height: 1; }
.count span { display: block; font-size: .78rem; color: var(--muted); }
.bar { height: 6px; background: var(--line); border-radius: 3px; overflow: hidden; margin-top: -12px; }
.bar i { display: block; height: 100%; background: var(--accent); }

.card { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 22px; }
.lbl { font-size: .75rem; letter-spacing: .08em; color: var(--muted); margin-bottom: 6px; display: block; }

/* 短文 */
.story .tools { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.story h2 { font-family: var(--font-serif); font-size: 1.3rem; }
.story-text { font-family: var(--font-serif); font-size: 1.15rem; line-height: 2.3; display: flex; flex-direction: column; gap: 14px; }
rt { font-family: var(--font-sans); font-size: .5em; color: var(--muted); }
.no-rt rt { display: none; }
.no-rt .story-text { line-height: 2; }
.v { background: var(--accent-soft); color: var(--accent); font-weight: 700; padding: 1px 3px; border-radius: 3px; }
.g { border-bottom: 2px solid var(--grammar); color: var(--grammar); font-weight: 700; }
.legend { display: flex; gap: 18px; flex-wrap: wrap; font-size: .82rem; color: var(--muted); margin-top: 14px; }
.toggle { border: 1px solid var(--line); background: var(--bg); color: var(--fg); padding: 6px 14px; border-radius: 999px; font-size: .85rem; }
.toggle[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--bg); }

/* 表格 */
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: .95rem; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: .75rem; letter-spacing: .06em; color: var(--muted); font-weight: 500; white-space: nowrap; }
.vocab table { min-width: 620px; }
.vocab td:first-child { font-family: var(--font-serif); font-size: 1.1rem; font-weight: 700; white-space: nowrap; }
td.pos { color: var(--muted); font-size: .85rem; white-space: nowrap; }
td.tip { color: var(--muted); font-size: .88rem; }
.type { display: inline-block; font-size: .72rem; border-radius: 4px; padding: 1px 7px; white-space: nowrap; border: 1px solid currentColor; }
.type.k { color: var(--accent); }
.type.f { color: var(--warm); }
.type.w { color: var(--grammar); }
.cmp { min-width: 480px; }
.cmp td:first-child { white-space: nowrap; font-weight: 500; }

/* 文法卡 */
.grammar-list { display: grid; gap: 18px; }
.gcard { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.gh { padding: 16px 20px 14px; background: var(--grammar-soft); border-bottom: 1px solid var(--line); }
.gh h3 { font-family: var(--font-serif); font-size: 1.35rem; color: var(--grammar); }
.gh p { font-size: .95rem; }
.gbody { padding: 18px 20px 20px; display: flex; flex-direction: column; gap: 18px; }
.formula { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.chip { border: 1px solid var(--line); background: var(--bg); border-radius: 6px; padding: 4px 10px; font-size: .92rem; line-height: 1.4; }
.chip small { display: block; font-size: .7rem; color: var(--muted); }
.chip.fix { background: var(--grammar); border-color: var(--grammar); color: var(--bg); font-family: var(--font-serif); font-weight: 700; display: flex; align-items: center; }
.op { color: var(--muted); }
.conj { font-family: var(--font-serif); font-size: .95rem; color: var(--muted); margin-top: 8px; }
.points { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 8px; }
.points li { display: grid; grid-template-columns: 4.5em 1fr; gap: 10px; font-size: .95rem; }
.points li b { color: var(--grammar); font-weight: 500; font-size: .82rem; padding-top: 2px; }
.exs { display: flex; flex-direction: column; gap: 10px; }
.ex { border-left: 3px solid var(--line); padding: 2px 0 2px 14px; font-family: var(--font-serif); font-size: 1.08rem; line-height: 1.8; }
.ex.src { border-left-color: var(--grammar); }
.ex small { display: block; font-family: var(--font-sans); color: var(--muted); font-size: .85rem; line-height: 1.5; }
.ex .tag { display: inline-block; font-family: var(--font-sans); font-size: .7rem; letter-spacing: .06em; color: var(--muted); border: 1px solid var(--line); border-radius: 4px; padding: 0 6px; margin-right: 6px; vertical-align: 2px; }
.note { font-size: .92rem; color: var(--muted); margin-top: 10px; }

/* 翻譯、測驗 */
details > summary { cursor: pointer; font-weight: 700; list-style: none; display: flex; justify-content: space-between; align-items: center; }
details > summary::-webkit-details-marker { display: none; }
details > summary::after { content: "展開"; font-size: .8rem; color: var(--muted); font-weight: 400; }
details[open] > summary::after { content: "收合"; }
.zh { display: flex; flex-direction: column; gap: 12px; margin-top: 14px; }
.quiz { display: flex; flex-direction: column; gap: 22px; }
.q .stem { font-weight: 500; margin-bottom: 10px; }
.q .ja { font-family: var(--font-serif); }
.opts { display: flex; flex-direction: column; gap: 8px; }
.opt { text-align: left; border: 1px solid var(--line); background: var(--bg); color: var(--fg); padding: 10px 14px; border-radius: 8px; }
.opt:hover { border-color: var(--accent); }
.opt.right { border-color: var(--ok); background: var(--grammar-soft); }
.opt.wrong { border-color: var(--bad); }
.fb { margin-top: 10px; font-size: .92rem; color: var(--muted); }

/* 上一篇／下一篇 */
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.pager a { display: block; text-decoration: none; color: var(--fg); background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; }
.pager a:hover { border-color: var(--accent); }
.pager small { display: block; color: var(--muted); font-size: .78rem; }
.pager b { font-family: var(--font-serif); font-weight: 700; }
.pager .next { text-align: right; grid-column: 2; }
.center { display: flex; justify-content: center; }
footer { color: var(--muted); font-size: .82rem; text-align: center; }

/* 書架 */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.stat { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; }
.stat b { display: block; font-family: var(--font-serif); font-size: 1.6rem; color: var(--accent); line-height: 1.2; font-variant-numeric: tabular-nums; }
.stat span { font-size: .8rem; color: var(--muted); }
.filters { display: flex; flex-direction: column; gap: 12px; }
.search { width: 100%; font: inherit; padding: 10px 14px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); color: var(--fg); }
.filterrow { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.filterrow .hint { font-size: .82rem; color: var(--muted); margin-left: auto; }
.day h2 { font-size: 1rem; color: var(--muted); font-weight: 500; margin-bottom: 10px; }
.list { display: grid; gap: 10px; }
.item { display: grid; grid-template-columns: 3.2em 1fr; gap: 12px; text-decoration: none; color: var(--fg); background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; }
.item:hover { border-color: var(--accent); }
.item .hr { font-variant-numeric: tabular-nums; color: var(--muted); font-size: .9rem; padding-top: 2px; }
.item .t, .item .s { display: block; }
.item .t { font-family: var(--font-serif); font-weight: 700; font-size: 1.1rem; }
.item .s { color: var(--muted); font-size: .9rem; }
.item .gs { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.item .gs span { font-size: .75rem; color: var(--grammar); background: var(--grammar-soft); border-radius: 4px; padding: 0 6px; }
.item.read .t::after { content: "已讀"; font-family: var(--font-sans); font-size: .7rem; font-weight: 400; color: var(--muted); border: 1px solid var(--line); border-radius: 4px; padding: 0 5px; margin-left: 8px; vertical-align: 3px; }
.empty { text-align: center; color: var(--muted); padding: 32px 0; }

/* 文法索引 */
.gindex { display: grid; gap: 8px; }
.grow { display: block; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 10px 16px; text-decoration: none; color: var(--fg); }
.grow:hover { border-color: var(--accent); }
.grow b { display: block; font-family: var(--font-serif); color: var(--grammar); font-size: 1.1rem; }
.grow span { display: block; color: var(--muted); font-size: .88rem; }
.grow i { font-style: normal; color: var(--accent); }

@media (max-width: 520px) {
  header.hero h1 { font-size: 1.5rem; }
  .card { padding: 18px 16px; }
  .story-text { font-size: 1.05rem; }
  .points li { grid-template-columns: 1fr; gap: 2px; }
  .stat b { font-size: 1.3rem; }
}