/* ═══════════════════════════════════════════════
   site.css — shared styles for tuantran.org
   Used by: poetry.html, themes.html (and other
   pages sharing this header/nav/footer/poem layout)
   ═══════════════════════════════════════════════ */

/* ── RESET & BASE ─────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --ink: #1a1610;
  --ink-soft: #4a3f30;
  --ink-faint: #8a7a68;
  --paper: #f5f0e8;
  --paper-warm: #ede5d4;
  --paper-deep: #ddd2bc;
  --red: #8b2020;
  --red-soft: #a83030;
  --gold: #9a7a3a;
  --gold-light: #c4a265;

  --font-display: 'Cinzel', serif;
  --font-body: 'Crimson Pro', serif;
  --font-quote: 'Cormorant Garamond', serif;
  --font-vietnamese: 'Be Vietnam', 'Crimson Pro', serif;

  --max-w: 960px;
  --side: clamp(1.25rem, 5vw, 3rem);
}

html { scroll-behavior: smooth; }

body {
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: clamp(1.05rem, 1.8vw, 1.2rem);
  line-height: 1.75;
  min-height: 100vh;
}

/* ── TEXTURE OVERLAY ──────────────────────────── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
}

/* ── SKIP LINK ────────────────────────────────── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--red);
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: 0 0 4px 4px;
  font-family: var(--font-body);
  transition: top 0.2s;
  z-index: 999;
}
.skip-link:focus { top: 0; }

/* ── SCREEN READER ONLY ───────────────────────── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── HEADER ───────────────────────────────────── */
header {
  position: relative;
  z-index: 10;
  background: var(--ink);
  color: var(--paper);
  padding: 2.5rem var(--side) 2rem;
  text-align: center;
  border-bottom: 3px solid var(--gold);
}

.site-eyebrow {
  font-family: var(--font-display);
  font-size: clamp(0.6rem, 1.2vw, 0.75rem);
  letter-spacing: 0.25em;
  color: var(--gold-light);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.site-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4.5vw, 3rem);
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.2;
  color: var(--paper);
}

.site-title a {
  color: inherit;
  text-decoration: none;
}

.site-subtitle {
  font-family: var(--font-quote);
  font-style: italic;
  font-size: clamp(0.95rem, 1.8vw, 1.2rem);
  color: var(--gold-light);
  margin-top: 0.5rem;
  font-weight: 300;
}

/* ── NAV ──────────────────────────────────────── */
nav.main-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--ink);
  border-bottom: 1px solid var(--gold);
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--side);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 1rem 0;
  background: none;
  border: none;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--gold-light);
  transition: all 0.3s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.nav-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
}

.nav-links a {
  display: block;
  padding: 0.85rem 0.9rem;
  font-family: var(--font-display);
  font-size: clamp(0.55rem, 1vw, 0.7rem);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--paper-warm);
  text-decoration: none;
  transition: color 0.2s, background 0.2s;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--gold-light);
  background: rgba(255,255,255,0.05);
}

/* ── BANNER ───────────────────────────────────── */
.banner {
  width: 100%;
  max-height: 280px;
  object-fit: cover;
  object-position: center top;
  display: block;
  filter: sepia(20%) contrast(0.9);
}

/* ── PAGE TITLE BLOCK ─────────────────────────── */
.page-title-block {
  background: var(--paper-warm);
  border-bottom: 1px solid var(--paper-deep);
  padding: 2rem var(--side);
  text-align: center;
}

.page-label {
  font-family: var(--font-display);
  font-size: 0.65rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--red);
  display: block;
  margin-bottom: 0.5rem;
}

.page-title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.5vw, 2.2rem);
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--ink);
  line-height: 1.2;
}

.page-desc {
  font-family: var(--font-quote);
  font-style: italic;
  font-weight: 300;
  font-size: clamp(0.95rem, 1.8vw, 1.1rem);
  color: var(--ink-faint);
  margin-top: 0.5rem;
}

/* ── MAIN ─────────────────────────────────────── */
main {
  position: relative;
  z-index: 1;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3rem var(--side) 4rem;
}

/* ── PROSE ────────────────────────────────────── */
.prose p {
  margin-bottom: 1.4em;
  color: var(--ink-soft);
}

.prose p:last-child { margin-bottom: 0; }

.prose h2, .prose h3 {
  font-family: var(--font-display);
  font-size: clamp(0.8rem, 1.4vw, 0.95rem);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--red);
  margin: 2.5rem 0 1rem;
}

/* ── BILINGUAL POEM LAYOUT ───────────────────── */
.archive-poem-list {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.poem-entry {
  background: rgba(237, 229, 212, 0.4);
  padding: 1.5rem;
  border-radius: 4px;
  page-break-inside: avoid;
}

.poem-number {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 1rem;
  display: block;
  font-weight: 600;
}

/* Two-column grid: English | Vietnamese */
.poem-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

.poem-text {
  font-family: var(--font-quote);
  font-style: italic;
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  line-height: 2;
  color: var(--ink);
  white-space: pre-line;
}

.poem-text.vi {
  font-family: var(--font-vietnamese);
  font-style: normal;
  font-weight: 300;
  font-size: clamp(0.95rem, 1.4vw, 1.1rem);
  line-height: 2;
  color: var(--ink-soft);
  border-left: 2px solid var(--paper-deep);
  padding-left: 1.5rem;
}

/* Column labels */
.col-label {
  font-family: var(--font-display);
  font-size: 0.55rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 0.75rem;
  display: block;
}

.col-label.vi-label {
  padding-left: 1.5rem;
}

/* Responsive: stack vertically on small screens */
@media (max-width: 680px) {
  .poem-columns {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .poem-text.vi {
    border-left: none;
    border-top: 2px solid var(--paper-deep);
    padding-left: 0;
    padding-top: 1rem;
  }

  .col-label.vi-label {
    padding-left: 0;
  }
}

/* ── FOOTER ───────────────────────────────────── */
footer {
  position: relative;
  z-index: 1;
  background: var(--ink);
  color: var(--ink-faint);
  text-align: center;
  padding: 2rem var(--side);
  border-top: 1px solid rgba(154,122,58,0.3);
}

footer p {
  font-family: var(--font-body);
  font-size: 0.85rem;
  line-height: 1.8;
}

footer a { color: var(--gold-light); text-decoration: none; }
footer a:hover { text-decoration: underline; }

.footer-nav {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.25rem 1.5rem;
  margin-bottom: 1.25rem;
}

.footer-nav a {
  font-family: var(--font-display);
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.footer-nav a:hover { color: var(--gold-light); }

/* ── PAGE NAV (prev / next) ───────────────────── */
.page-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--paper-deep);
}

.page-nav a {
  font-family: var(--font-display);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--red);
  text-decoration: none;
  transition: color 0.2s;
}

.page-nav a:hover { color: var(--red-soft); }
.page-nav .next { margin-left: auto; }

/* ── RESPONSIVE NAV ───────────────────────────── */
@media (max-width: 680px) {
  .nav-toggle { display: flex; }

  .nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
    border-top: 1px solid rgba(255,255,255,0.1);
  }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    width: 100%;
    border-top: 1px solid rgba(255,255,255,0.1);
    max-height: 75vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .nav-inner { flex-wrap: wrap; }
}

/* ── ANIMATIONS ───────────────────────────────── */
@media (prefers-reduced-motion: no-preference) {
  main { animation: fadeUp 0.6s ease both; }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── BUTTON STYLING ───────────────────────────── */
.print-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--red);
  color: #fff;
  border: none;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  border-radius: 4px;
  transition: background-color 0.2s, transform 0.1s;
}
.print-btn:hover {
  background-color: var(--red-soft);
  transform: translateY(-1px);
}
.print-btn:active {
  transform: translateY(0);
}

/* ── PRINT STYLES ─────────────────────────────── */
@media print {
  nav.main-nav, footer, .page-nav, .skip-link, .print-btn, .nav-toggle {
    display: none !important;
  }

  body::before { display: none !important; }

  body {
    background: white !important;
    color: #000 !important;
    font-size: 12pt;
    line-height: 1.6;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  main {
    max-width: 100% !important;
    padding: 0 !important;
    margin: 0 auto;
  }

  .poem-entry {
    display: block !important;
    visibility: visible !important;
    background: transparent !important;
    border-left: 3px solid #000 !important;
    border-radius: 0;
    padding: 1rem 0 1rem 1.5rem;
    margin: 2rem 0;
    page-break-inside: avoid;
    break-inside: avoid;
  }

  .poem-entry *,
  .poem-text,
  .poem-number,
  .poem-text.vi {
    color: #000 !important;
    background: transparent !important;
    opacity: 1 !important;
  }

  /* Keep side-by-side in print */
  .poem-columns {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }

  .poem-text.vi {
    border-left: 1px solid #ccc;
    padding-left: 1rem;
  }

  h1, h2, h3, p, .prose p, .prose h3 {
    color: #000 !important;
    page-break-after: avoid;
  }

  /* Avoid blank pages between grouped sections (e.g. theme sections) */
  .theme-section {
    break-inside: avoid;
    margin-top: 3rem;
  }
}