/* ================================================================
   WHISPERHEAVEN LIBRARY — style.css
   Aesthetic: Gothic Scholar · Dark · Arcane · Editorial
   ================================================================ */

/* ── CUSTOM PROPERTIES ─────────────────────────────────────────── */
:root {
  --ink:        #0d0b08;
  --parchment:  #f5f0e6;
  --gold:       #b8923a;
  --gold-light: #d4a84b;
  --gold-dim:   #7a5f28;
  --amber:      #c9832a;
  --crimson:    #7a2020;
  --teal:       #1a4a4a;
  --stone:      #1c1812;
  --stone-mid:  #2a231a;
  --stone-soft: #3a3028;
  --text-main:  #e8dfc8;
  --text-muted: #9a8f78;
  --text-dim:   #6a5f4a;
  --border:     rgba(184, 146, 58, 0.25);
  --border-mid: rgba(184, 146, 58, 0.5);
  --shadow:     rgba(0, 0, 0, 0.6);

  --font-display: 'Cinzel Decorative', serif;
  --font-heading: 'Cinzel', serif;
  --font-body:    'EB Garamond', serif;

  --radius: 4px;
  --max-w: 1200px;
  --max-prose: 800px;
}

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

html { scroll-behavior: smooth; }

body {
  background-color: var(--ink);
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.75;
  min-height: 100vh;
  overflow-x: hidden;
  background-image:
    radial-gradient(ellipse at 20% 0%, rgba(90,60,20,0.15) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 100%, rgba(30,20,10,0.3) 0%, transparent 60%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='4' height='4'%3E%3Crect width='4' height='4' fill='%230d0b08'/%3E%3Crect width='1' height='1' fill='%23141008' opacity='0.5'/%3E%3C/svg%3E");
}

/* ── WARNING NOTE ───────────────────────────────────────────────── */
.warning-note {
  background: rgba(122, 32, 32, 0.15);
  border: 1px solid rgba(122, 32, 32, 0.5);
  border-left: 3px solid var(--crimson);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  font-size: 0.92rem;
  color: var(--text-muted);
  font-family: var(--font-heading);
  letter-spacing: 0.02em;
}

.warning-note strong { color: #c06060; }

/* ── PARTICLE CANVAS ───────────────────────────────────────────── */
#particles {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.7;
}

/* ── HEADER ─────────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 11, 8, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.logo-block {
  display: flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
  color: inherit;
}

.logo-sigil {
  font-size: 1.8rem;
  color: var(--gold);
  line-height: 1;
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-3px); }
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--gold);
  letter-spacing: 0.05em;
  line-height: 1.2;
}

.logo-subtitle {
  font-size: 0.7rem;
  color: var(--text-dim);
  font-family: var(--font-heading);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.main-nav {
  display: flex;
  gap: 0.25rem;
}

.nav-link {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.4rem 0.9rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: all 0.2s;
}

.nav-link:hover,
.nav-link.active {
  color: var(--gold);
  border-color: var(--border-mid);
  background: rgba(184,146,58,0.08);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-mid);
  color: var(--gold);
  font-size: 1.1rem;
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  cursor: pointer;
}

.header-rule {
  text-align: center;
  color: var(--gold-dim);
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  padding: 0.2rem 0;
  border-top: 1px solid var(--border);
}

/* ── MOBILE NAV ─────────────────────────────────────────────────── */
.mobile-nav {
  display: none;
  flex-direction: column;
  background: var(--stone);
  border-bottom: 1px solid var(--border);
  padding: 0.5rem 1rem;
  z-index: 99;
  position: relative;
}

.mobile-nav.open { display: flex; }

.mobile-nav .nav-link {
  padding: 0.75rem 0.5rem;
  border-bottom: 1px solid var(--border);
  border-radius: 0;
}

/* ── HERO ───────────────────────────────────────────────────────── */
.hero {
  position: relative;
  z-index: 1;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 5rem 2rem 4rem;
  text-align: center;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 50%; transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(184,146,58,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-eyebrow {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--gold-dim);
  margin-bottom: 1.25rem;
  animation: fadeUp 0.8s ease forwards;
  opacity: 0;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.15;
  color: var(--parchment);
  margin-bottom: 1.5rem;
  animation: fadeUp 0.8s 0.1s ease forwards;
  opacity: 0;
}

.hero-title em {
  color: var(--gold);
  font-style: italic;
}

.hero-body {
  max-width: 640px;
  margin: 0 auto 2.5rem;
  color: var(--text-muted);
  font-size: 1.15rem;
  animation: fadeUp 0.8s 0.2s ease forwards;
  opacity: 0;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  animation: fadeUp 0.8s 0.35s ease forwards;
  opacity: 0;
}

.stat { text-align: center; }

.stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--gold);
  line-height: 1;
  margin-bottom: 0.25rem;
}

.stat-label {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.stat-div {
  color: var(--gold-dim);
  font-size: 0.9rem;
}

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

/* ── PAGE HERO (about, copyright) ───────────────────────────────── */
.page-hero {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 4rem 2rem 2rem;
  border-bottom: 1px solid var(--border);
}

.page-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 3rem);
  color: var(--parchment);
  margin-top: 0.5rem;
}

/* ── SEARCH & FILTERS ───────────────────────────────────────────── */
.catalogue-controls {
  position: relative;
  z-index: 1;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2rem 2rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.search-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--stone-mid);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius);
  padding: 0.6rem 1rem;
  max-width: 480px;
}

.search-icon { color: var(--gold-dim); font-size: 1rem; }

.search-bar input {
  background: none;
  border: none;
  outline: none;
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 1rem;
  width: 100%;
}

.search-bar input::placeholder { color: var(--text-dim); }

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.filter-btn {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 0.35rem 0.85rem;
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.2s;
}

.filter-btn:hover {
  border-color: var(--gold-dim);
  color: var(--gold);
}

.filter-btn.active {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink);
}

/* ── CATALOGUE GRID ─────────────────────────────────────────────── */
.catalogue {
  position: relative;
  z-index: 1;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1.5rem 2rem 3rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
  align-items: start;
}

/* ── WORK CARD ──────────────────────────────────────────────────── */
.work-card {
  background: var(--stone-mid);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  position: relative;
  overflow: hidden;
  animation: fadeUp 0.5s ease forwards;
  opacity: 0;
  transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
}

.work-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold-dim), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

.work-card:hover {
  border-color: var(--gold-dim);
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.5);
}

.work-card:hover::before { opacity: 1; }

.card-genre {
  font-family: var(--font-heading);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold-dim);
}

.card-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--parchment);
  line-height: 1.3;
}

.card-author {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.card-year { color: var(--text-dim); font-size: 0.85rem; }

.card-summary {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
  flex: 1;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tag {
  font-family: var(--font-heading);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: rgba(184,146,58,0.1);
  border: 1px solid var(--border);
  color: var(--gold-dim);
  padding: 0.2rem 0.5rem;
  border-radius: 2px;
}

.card-footer { margin-top: 0.5rem; }

.card-btn {
  font-family: var(--font-heading);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.45rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--gold-dim);
  color: var(--gold);
  display: inline-block;
  transition: all 0.2s;
}

.card-btn:hover {
  background: var(--gold);
  color: var(--ink);
}

.card-btn.unavailable {
  border-color: var(--border);
  color: var(--text-dim);
  cursor: default;
  opacity: 0.6;
}

/* ── EMPTY STATE ─────────────────────────────────────────────────── */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-dim);
  font-style: italic;
  font-size: 1.1rem;
}

/* ── UPLOAD PROMPT ──────────────────────────────────────────────── */
.upload-prompt {
  position: relative;
  z-index: 1;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1rem 2rem 3rem;
  border-top: 1px solid var(--border);
}

.upload-text {
  color: var(--text-dim);
  font-size: 0.9rem;
}

.upload-text a {
  color: var(--gold-dim);
  text-decoration: underline;
  cursor: pointer;
}

.upload-guide {
  margin-top: 1.25rem;
  background: var(--stone);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius);
  padding: 1.75rem;
  max-width: 640px;
}

.upload-guide h3 {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--gold);
  margin-bottom: 1rem;
}

.upload-guide ol {
  padding-left: 1.25rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.upload-guide code {
  background: rgba(184,146,58,0.12);
  color: var(--gold-light);
  padding: 0.1em 0.4em;
  border-radius: 3px;
  font-size: 0.85em;
}

/* ── PROSE PAGE (About, Copyright) ──────────────────────────────── */
.prose-page {
  position: relative;
  z-index: 1;
  max-width: var(--max-prose);
  margin: 0 auto;
  padding: 3rem 2rem 5rem;
}

.prose-block {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.prose-block h2 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--parchment);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
}

.prose-block p {
  color: var(--text-muted);
  line-height: 1.85;
}

.prose-block blockquote {
  border-left: 3px solid var(--gold-dim);
  padding: 1rem 1.5rem;
  margin: 0.5rem 0;
  background: rgba(184,146,58,0.05);
  color: var(--text-muted);
  font-style: italic;
  font-size: 1.05rem;
  line-height: 1.8;
}

.ornament {
  text-align: center;
  color: var(--gold-dim);
  letter-spacing: 0.5em;
  font-size: 0.9rem;
  margin: 0.5rem 0;
}

.external-link {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  color: var(--gold);
  text-decoration: none;
  border: 1px solid var(--border-mid);
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius);
  display: inline-block;
  transition: all 0.2s;
}

.external-link:hover {
  background: rgba(184,146,58,0.1);
  border-color: var(--gold);
}

/* ── LICENSE GRID (copyright page) ─────────────────────────────── */
.license-badge {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  background: var(--stone-mid);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius);
  padding: 1.25rem 1.75rem;
}

.license-icon {
  font-size: 2.5rem;
  color: var(--gold);
  line-height: 1;
  flex-shrink: 0;
}

.license-text {
  font-family: var(--font-heading);
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.license-code {
  color: var(--gold);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.05em;
}

.license-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}

.license-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.license-card.allowed  { border-top: 3px solid #2a7a3a; }
.license-card.conditions { border-top: 3px solid var(--gold-dim); }
.license-card.forbidden  { border-top: 3px solid var(--crimson); }

.lc-icon {
  font-size: 1.5rem;
  font-family: var(--font-display);
}

.license-card.allowed .lc-icon    { color: #4aaa5a; }
.license-card.conditions .lc-icon { color: var(--gold); }
.license-card.forbidden .lc-icon  { color: #c04040; }

.license-card h3 {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-main);
}

.license-card ul {
  padding-left: 1.1rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* ── SCROLL REVEAL ──────────────────────────────────────────────── */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-on-scroll.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ── FOOTER ─────────────────────────────────────────────────────── */
.site-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
  padding: 3rem 2rem;
  text-align: center;
}

.footer-sigil {
  font-size: 1.5rem;
  color: var(--gold-dim);
  margin-bottom: 1rem;
}

.footer-copy {
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.8;
}

.footer-copy a {
  color: var(--gold-dim);
  text-decoration: underline;
  text-decoration-color: var(--border);
}

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

.footer-note {
  margin-top: 0.75rem;
  font-style: italic;
  color: var(--text-dim);
  opacity: 0.6;
  font-size: 0.85rem;
}

/* ── RESPONSIVE ─────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .main-nav { display: none; }
  .nav-toggle { display: flex; align-items: center; justify-content: center; }
  .logo-subtitle { display: none; }
  .hero { padding: 3rem 1.5rem 2.5rem; }
  .hero-stats { gap: 1.25rem; }
  .stat-num { font-size: 1.5rem; }
  .catalogue { grid-template-columns: 1fr; padding: 1rem 1.25rem 2rem; }
  .catalogue-controls { padding: 1.5rem 1.25rem 0.5rem; }
  .prose-page { padding: 2rem 1.25rem 3rem; }
  .license-grid { grid-template-columns: 1fr; }
  .header-inner { padding: 0.85rem 1.25rem; }
  .upload-prompt { padding: 1rem 1.25rem 2rem; }
}

@media (max-width: 480px) {
  .logo-title { font-size: 0.9rem; }
  .hero-title { font-size: 1.75rem; }
  .hero-stats { flex-direction: column; gap: 0.75rem; }
  .stat-div { display: none; }
}