/* 投放助手公開頁：純靜態、無外部字型或腳本 */
:root {
  --bg: #f7f6f2;
  --surface: #ffffff;
  --text: #1d2521;
  --muted: #56615b;
  --line: #d9ddd6;
  --accent: #1f5f4a;
  --accent-soft: #e3efe9;
  --draft-bg: #fff4d6;
  --draft-line: #d9a93a;
  --draft-text: #5a4210;
  --pending-bg: #fdebd8;
  --pending-text: #7a3b0c;
  --focus: #0b57d0;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141816;
    --surface: #1c211e;
    --text: #e6ebe7;
    --muted: #a3ada7;
    --line: #333b36;
    --accent: #7cc6a8;
    --accent-soft: #213229;
    --draft-bg: #33290f;
    --draft-line: #a8812a;
    --draft-text: #f3dc9f;
    --pending-bg: #3a2616;
    --pending-text: #f5c49a;
    --focus: #8ab4f8;
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  font-size: 1.0625rem;
  line-height: 1.75;
}

a { color: var(--accent); text-underline-offset: 0.2em; }

a:focus-visible, summary:focus-visible, [tabindex]:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  padding: 0.5rem 0.75rem;
  background: var(--surface);
  border: 1px solid var(--line);
  z-index: 10;
}
.skip-link:focus { top: 0.75rem; }

.wrap {
  width: 100%;
  max-width: 46rem;
  margin: 0 auto;
  padding: 0 1rem;
}

.draft-banner {
  background: var(--draft-bg);
  border-bottom: 2px solid var(--draft-line);
  color: var(--draft-text);
  font-size: 0.9375rem;
}
.draft-banner p { margin: 0; padding: 0.6rem 0; }

.site-header { border-bottom: 1px solid var(--line); background: var(--surface); }
.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
}
.brand {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: 0.04em;
}
.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.1rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.9375rem;
}
.site-nav a { color: var(--muted); text-decoration: none; }
.site-nav a:hover { color: var(--accent); text-decoration: underline; }
.site-nav a[aria-current="page"] { color: var(--text); font-weight: 600; text-decoration: underline; }

main { padding: 2.5rem 0 3rem; }

h1 { font-size: 2rem; line-height: 1.3; margin: 0 0 0.75rem; }
h2 { font-size: 1.3rem; line-height: 1.4; margin: 2.25rem 0 0.5rem; }
p, ol, ul { margin: 0 0 1rem; }
ol li, ul li { margin-bottom: 0.4rem; }

.lead { font-size: 1.25rem; color: var(--text); margin-bottom: 1.25rem; }
.meta { color: var(--muted); font-size: 0.9375rem; }

.status {
  display: inline-block;
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
}

.pending {
  background: var(--pending-bg);
  color: var(--pending-text);
  padding: 0.05rem 0.35rem;
  border-radius: 3px;
  font-size: 0.9em;
}

.notice {
  border-left: 4px solid var(--draft-line);
  background: var(--surface);
  padding: 0.9rem 1rem;
  margin: 1.5rem 0;
}
.notice > :last-child { margin-bottom: 0; }

.link-list { list-style: none; padding: 0; }
.link-list li {
  border-top: 1px solid var(--line);
  margin: 0;
  padding: 0.7rem 0;
}
.link-list li:last-child { border-bottom: 1px solid var(--line); }

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
  font-size: 0.875rem;
}
.site-footer .wrap { padding-top: 1.25rem; padding-bottom: 1.5rem; }
.site-footer p { margin: 0 0 0.35rem; }
.site-footer ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1rem;
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0;
}

@media (max-width: 480px) {
  body { font-size: 1rem; }
  h1 { font-size: 1.65rem; }
  .lead { font-size: 1.125rem; }
  main { padding-top: 1.75rem; }
}