/* ============================================================
   HK Info Cloud News — 香港資訊雲 News
   Apple-inspired theme. System fonts only, no external CDN.
   Type sizes kept MODERATE (hero ~26-33px, body 16px).
   ============================================================ */

:root {
  --bg: #f5f5f7;
  --surface: #ffffff;
  --text: #1d1d1f;
  --text-2: #6e6e73;
  --border: #d2d2d7;
  --accent: #0071e3;
  --accent-2: #2997ff;
  --radius: 12px;
  --radius-sm: 8px;
  --nav-h: 52px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Icons",
    "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang TC",
    "Hiragino Sans CNS", "Microsoft JhengHei", "Noto Sans TC", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --surface: #1c1c1e;
    --text: #f5f5f7;
    --text-2: #86868b;
    --border: #2c2c2e;
    --accent: #2997ff;
    --accent-2: #0a84ff;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); }

.container { width: min(1068px, 92vw); margin: 0 auto; }

/* ---------- Sticky glass nav ---------- */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 70%, transparent);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: var(--nav-h);
}

.site-brand {
  color: var(--text);
  text-decoration: none;
  font-size: 1.22rem;
  font-weight: 650;
  letter-spacing: -0.015em;
  white-space: nowrap;
}

.site-brand-en {
  display: inline-block;
  margin-left: 0.45rem;
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--text-2);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-links { display: flex; gap: 1.1rem; align-items: center; }

.nav-links a {
  color: var(--text);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  padding: 4px 0;
  white-space: nowrap;
}

.nav-links a:hover { color: var(--accent); }

.nav-links a.active { color: var(--accent); font-weight: 600; }

@media (max-width: 640px) {
  .nav-inner { flex-wrap: wrap; height: auto; padding: 0.55rem 0; gap: 0.4rem 0.9rem; }
  .nav-links { flex-wrap: wrap; gap: 0.8rem; }
  .nav-links a { font-size: 0.82rem; }
}

.demo-note {
  margin-top: 0.9rem;
  padding: 0.45rem 0.8rem;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-2);
}

/* ---------- Layout ---------- */

main { padding: 1.6rem 0 3rem; }

.crumbs { margin: 0.4rem 0 0; font-size: 0.85rem; }
.crumbs a { text-decoration: none; color: var(--text-2); }
.crumbs a:hover { color: var(--accent); }

/* ---------- Hero (moderate, centered, airy) ---------- */

.hero-link-wrap {
  display: block;
  padding: 2.8rem 1rem 2.2rem;
  text-align: center;
  color: inherit;
  text-decoration: none;
}

.hero-latest {
  display: inline-block;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.hero-title {
  font-size: clamp(1.55rem, 3vw, 2.05rem); /* ~25-33px */
  line-height: 1.28;
  letter-spacing: -0.015em;
  font-weight: 700;
  margin: 0.6rem auto 0.5rem;
  max-width: 32ch;
}

.hero-excerpt {
  color: var(--text-2);
  font-size: 1rem;
  max-width: 52ch;
  margin: 0 auto 1.1rem;
}

.hero-link-wrap .card-link { font-size: 0.95rem; }

/* ---------- Section ---------- */

.section-title {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin: 2.2rem 0 0.3rem;
}

.section-title-en {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-2);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ---------- Article grid / cards ---------- */

.article-grid {
  display: grid;
  gap: 1.05rem;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .article-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 960px) {
  .article-grid { grid-template-columns: repeat(3, 1fr); }
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem 1.15rem 1rem;
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.card:hover { border-color: var(--accent-2); transform: translateY(-2px); }

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.45rem;
}

.card-date { font-size: 0.78rem; color: var(--text-2); }

.card-title {
  font-size: 1.08rem;
  line-height: 1.42;
  letter-spacing: -0.01em;
  margin: 0.35rem 0;
}

.card-title a { color: var(--text); text-decoration: none; }
.card-title a:hover { color: var(--accent); }

.card-en {
  margin: 0 0 0.5rem;
  font-size: 0.8rem;
  color: var(--text-2);
}

.card-excerpt {
  flex: 1;
  margin: 0 0 1rem;
  font-size: 0.92rem;
  color: var(--text-2);
}

.card-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
}

.card-link:hover { text-decoration: underline; }

/* ---------- Badges ---------- */

.badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.74rem;
  font-weight: 600;
  white-space: nowrap;
}

.badge-ai    { background: rgba(0, 113, 227, 0.12); color: #0071e3; }
.badge-city  { background: rgba(52, 199, 89, 0.12); color: #248a3d; }
.badge-hot   { background: rgba(255, 59, 48, 0.12); color: #d70015; }
.badge-other { background: var(--surface); border: 1px solid var(--border); color: var(--text-2); }

@media (prefers-color-scheme: dark) {
  .badge-ai { color: #2997ff; }
  .badge-city { color: #30d158; }
  .badge-hot { color: #ff6961; }
}

/* ---------- Article page ---------- */

.article-page-body { background: var(--bg); }

.article-page-body main { padding-top: 2rem; }

.article-column { max-width: 720px; }

.article-meta-top { margin-bottom: 0.6rem; }

.article-title {
  font-size: clamp(1.5rem, 2.2vw, 1.9rem); /* ~24-30px */
  line-height: 1.32;
  letter-spacing: -0.02em;
  font-weight: 700;
  margin: 0 0 0.5rem;
}

.en-subtitle {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-2);
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.45rem;
  margin: 1rem 0 1.3rem;
  padding: 0.6rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  font-size: 0.83rem;
  color: var(--text-2);
}

.meta-sep { opacity: 0.5; }
.meta-tags { margin-left: auto; display: flex; gap: 0.35rem; flex-wrap: wrap; }

.tag-badge {
  display: inline-block;
  padding: 0.12rem 0.55rem;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 0.73rem;
  font-weight: 500;
}

/* ---------- Article body typography ---------- */

.article-body {
  font-size: 1.02rem; /* ~16px */
  line-height: 1.7;
  word-wrap: break-word;
}

.article-body p { margin: 0 0 1.1rem; }

.article-body h3 {
  margin: 1.8rem 0 0.6rem;
  font-size: 1.14rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.article-body ul {
  margin: 0 0 1.1rem;
  padding-left: 1.4rem;
}

.article-body li { margin-bottom: 0.45rem; }

.article-body code {
  background: rgba(0, 0, 0, 0.055);
  padding: 0.12rem 0.35rem;
  border-radius: 5px;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.9em;
}

.article-body pre {
  background: #16161a;
  color: #f5f5f7;
  border-radius: var(--radius-sm);
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-size: 0.9rem;
}

.article-body blockquote {
  margin: 1.3rem 0 1.5rem;
  padding: 0.9rem 1.1rem;
  background: var(--surface);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.94rem;
  color: var(--text-2);
}

.article-body blockquote p { margin: 0.2rem 0; }
.article-body blockquote strong { color: var(--text); }

.article-body blockquote.ai-note {
  border-left-color: var(--accent-2);
  font-size: 0.88rem;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-2);
  text-align: center;
  padding: 2.4rem 0;
  font-size: 0.85rem;
}

.footer-brand {
  margin: 0 0 0.4rem;
  color: var(--text);
  font-weight: 650;
}

.site-footer p { margin: 0.25rem 0; }