/* _shared/common.css — 全局共享样式 */
@font-face {
  font-family: 'WorkSans';
  src: url('./fonts/WorkSans-Regular.ttf') format('truetype');
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: 'WorkSans';
  src: url('./fonts/WorkSans-Bold.ttf') format('truetype');
  font-weight: 700;
  font-display: swap;
}
@font-face {
  font-family: 'InstrumentSerif';
  src: url('./fonts/InstrumentSerif-Regular.ttf') format('truetype');
  font-weight: 400;
  font-display: swap;
}

:root {
  --bg: #FAF7F2;
  --bg2: #F3EDE4;
  --surface: #FFFFFF;
  --ink: #2A2622;
  --muted: #7A7068;
  --rule: #E6DED2;
  --accent: #B5651D;
  --accent-soft: #B5651D1A;
  --accent2: #4A7C59;
  --accent2-soft: #4A7C591A;
  --blue: #3B7DD8;
  --blue-soft: #3B7DD81A;
  --warn: #C0392B;
  --shadow: 0 1px 3px rgba(42,38,34,0.06), 0 8px 24px rgba(42,38,34,0.05);
  --nav-h: 56px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: 'WorkSans', 'Noto Sans CJK SC', 'Microsoft YaHei', 'PingFang SC', sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

/* ---------- NAV ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: var(--ink);
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
}
.site-nav .nav-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  margin-right: 2.5rem;
  flex-shrink: 0;
}
.site-nav .nav-brand svg { flex-shrink: 0; }
.site-nav .nav-links {
  display: flex;
  gap: 0.3rem;
}
.site-nav .nav-link {
  text-decoration: none;
  color: #C9BFB4;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.45rem 1rem;
  border-radius: 8px;
  transition: all 0.15s ease;
  white-space: nowrap;
}
.site-nav .nav-link:hover { color: #fff; background: rgba(255,255,255,0.08); }
.site-nav .nav-link.active {
  color: #fff;
  background: rgba(255,255,255,0.12);
}
.site-nav .nav-link.active::after {
  content: "";
  display: block;
  width: 18px;
  height: 3px;
  border-radius: 2px;
  background: var(--accent);
  margin: 4px auto 0;
}
.site-nav .nav-link[data-page="home"].active::after { background: var(--accent); }
.site-nav .nav-link[data-page="score"].active::after { background: var(--accent2); }
.site-nav .nav-link[data-page="compare"].active::after { background: var(--blue); }

/* Nav auth area */
.nav-auth {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.nav-user {
  color: #C9BFB4;
  font-size: 0.85rem;
  font-weight: 600;
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.nav-logout {
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.35rem 0.8rem;
  border-radius: 7px;
  border: 1px solid rgba(255,255,255,0.25);
  background: transparent;
  color: #fff;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}
.nav-logout:hover { background: rgba(255,255,255,0.12); border-color: rgba(255,255,255,0.4); }
.nav-login-link {
  text-decoration: none;
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.4rem 1rem;
  border-radius: 8px;
  background: var(--accent);
  transition: background 0.15s ease;
  white-space: nowrap;
}
.nav-login-link:hover { background: #9C5419; }
.nav-badge-compare {
  background: var(--accent);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.1rem 0.4rem;
  border-radius: 99px;
  margin-left: 0.25rem;
  min-width: 1.1rem;
  text-align: center;
}

/* Mobile hamburger */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.4rem;
  cursor: pointer;
  padding: 0.3rem;
}

/* ---------- Container ---------- */
.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ---------- Section helpers ---------- */
.section-head {
  margin-bottom: 2.5rem;
  max-width: 720px;
}
.section-head .kicker {
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent2);
  font-weight: 700;
  margin-bottom: 0.6rem;
}
.section-head h2 {
  font-family: 'InstrumentSerif', 'Noto Serif CJK SC', serif;
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 400;
  line-height: 1.2;
  margin-bottom: 0.8rem;
}
.section-head p { color: var(--muted); font-size: 1.02rem; }

section { padding: 3.5rem 0; }

/* ---------- Buttons ---------- */
.btn {
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.5rem 1.1rem;
  border-radius: 8px;
  border: 1px solid var(--rule);
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: #9C5419; color: #fff; }
.btn-green { background: var(--accent2); color: #fff; border-color: var(--accent2); }
.btn-green:hover { background: #3C6449; color: #fff; }
.btn-blue { background: var(--blue); color: #fff; border-color: var(--blue); }
.btn-blue:hover { background: #2E65B0; color: #fff; }

/* ---------- Callouts ---------- */
.callout {
  background: linear-gradient(135deg, var(--accent2-soft), var(--accent-soft));
  border: 1px solid var(--rule);
  border-radius: 14px;
  padding: 2rem;
  margin: 2rem 0;
}
.callout h3 {
  font-family: 'InstrumentSerif', serif;
  font-size: 1.4rem;
  font-weight: 400;
  margin-bottom: 0.8rem;
  color: var(--ink);
}
.callout p { color: var(--ink); font-size: 0.98rem; }

mark.key { background: none; color: var(--accent); font-weight: 600; }

/* ---------- Inline citations ---------- */
sup a {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.75em;
  font-weight: 600;
}
sup a:hover { text-decoration: underline; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--rule);
  padding: 2rem 0;
  margin-top: 1rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.82rem;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .site-nav .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: var(--ink);
    flex-direction: column;
    padding: 0.5rem 1rem 1rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  }
  .site-nav .nav-links.open { display: flex; }
  .site-nav .nav-link { padding: 0.7rem 1rem; }
  .container { padding: 0 1rem; }
  section { padding: 2.5rem 0; }
}

@media print {
  .site-nav { position: static; }
  .nav-toggle { display: none !important; }
}