/* ============================================================
   墨韵纸香 — Global layout & shared components
   Supplements design-system/tokens.css. All colors via CSS vars.
   ============================================================ */

* { box-sizing: border-box; }
body { position: relative; min-height: 100vh; }

/* ---------- Navigation ---------- */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-gutter-desktop);
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: var(--tracking-display);
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--fg);
  cursor: pointer;
  padding: var(--space-2);
}
.nav-toggle svg { width: 24px; height: 24px; }

/* ---------- Page container ---------- */
.page {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 100px var(--container-gutter-desktop) var(--space-20);
  position: relative;
  z-index: 1;
}

/* ---------- Hero (non-asymmetric) ---------- */
.hero {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: var(--space-12);
  align-items: end;
  margin-bottom: var(--space-16);
}
.hero__title {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: var(--space-2) 0 0;
}
.hero__title em {
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
}
.hero__desc {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--muted);
  line-height: 1.75;
  max-width: 26rem;
}
.hero__meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--meta);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-3);
}

/* ---------- Module entry cards ---------- */
.module-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-16);
}
.module-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  text-decoration: none;
}
.module-card__icon {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  background: var(--surface-warm);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--accent);
  margin-bottom: var(--space-2);
}
.module-card__icon svg { width: 22px; height: 22px; }
.module-card__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
  color: var(--fg);
}
.module-card__desc {
  font-size: var(--text-sm);
  color: var(--muted);
  line-height: 1.65;
}
.module-card__link {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin-top: var(--space-1);
}
.module-card__link svg { width: 16px; height: 16px; }

/* ---------- Section title ---------- */
.section-head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}
.section-head__line { flex: 1; height: 1px; background: var(--border); }
.section-intro {
  color: var(--muted);
  font-size: var(--text-sm);
  max-width: 36rem;
  margin-bottom: var(--space-8);
  line-height: 1.7;
}

/* ---------- Novel cards ---------- */
.novel-list { display: flex; flex-direction: column; gap: var(--space-6); }
.novel-card {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: var(--space-6);
  text-decoration: none;
  color: inherit;
}
.novel-card__cover {
  border-radius: var(--radius-sm);
  min-height: 220px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: var(--space-4);
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-sm);
  color: var(--meta);
}
.novel-card__body { display: flex; flex-direction: column; gap: var(--space-3); padding-top: var(--space-2); }
.novel-card__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
}
.novel-card__desc { color: var(--muted); font-size: var(--text-sm); line-height: 1.7; max-width: 32rem; }
.novel-card__meta {
  display: flex;
  gap: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--meta);
  letter-spacing: 0.04em;
}
.tag-row { display: flex; gap: var(--space-2); flex-wrap: wrap; }

/* ---------- Prose paragraphs (chapter / essay / character body text) ----------
   Base .prose (serif, line-height, drop-cap) lives in tokens.css.
   Here we only add inter-paragraph rhythm + Chinese first-line indent. */
.prose p { margin: 0 0 var(--space-5); }
.prose p + p { text-indent: 2em; }

/* ---------- Featured preview ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--space-6);
}
.feature-prose {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-8);
}

/* ---------- Footer ---------- */
.site-footer {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-12) var(--container-gutter-desktop) var(--space-10);
  border-top: 1px solid var(--border);
  position: relative;
  z-index: 1;
}
.footer-text {
  text-align: center;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--meta);
  letter-spacing: 0.1em;
  margin: 0;
}
.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--space-6);
  margin-bottom: var(--space-4);
}

/* ---------- State messages (loading / error / empty) ---------- */
.state-msg {
  text-align: center;
  padding: var(--space-8);
  color: var(--meta);
  font-size: var(--text-sm);
  font-family: var(--font-body);
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .nav-container, .page, .reader-layout, .site-footer {
    padding-left: var(--container-gutter-phone);
    padding-right: var(--container-gutter-phone);
  }
  .nav-menu {
    position: fixed;
    top: 60px; left: 0; right: 0;
    flex-direction: column;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: var(--space-4);
    gap: var(--space-1);
    transform: translateY(-120%);
    transition: transform var(--motion-base) var(--ease-standard);
    box-shadow: var(--elev-raised);
  }
  .nav-menu--open { transform: translateY(0); }
  .nav-toggle { display: flex; }
  .hero { grid-template-columns: 1fr; gap: var(--space-6); }
  .hero__title { font-size: 2.5rem; }
  .module-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .novel-card { grid-template-columns: 1fr; }
  .novel-card__cover { min-height: 140px; }
  .character-grid { grid-template-columns: 1fr; }
  .reader-layout { grid-template-columns: 1fr; padding-top: 80px; }
  .reader-toc { display: none; }
  .reader-toc-mobile { display: block; margin-top: var(--space-8); }
  .reader-bar { padding: 0 var(--container-gutter-phone); }
  .reader-ch-title { font-size: var(--text-sm); }
}
@media (max-width: 1024px) and (min-width: 769px) {
  .nav-container, .page, .reader-layout, .site-footer {
    padding-left: var(--container-gutter-tablet);
    padding-right: var(--container-gutter-tablet);
  }
}