/* lectures/style — inherits site styles, adds lecture-list specifics */

/* Re-use the root variables from the parent style.css */
:root {
  --parchment: #f5e6c8;
  --parchment-dark: #e8d5a3;
  --ink: #2c1a0e;
  --ink-light: #4a2f1a;
  --crimson: #8b1a1a;
  --gold: #c8972a;
  --gold-light: #e8b84b;
  --shadow: rgba(0, 0, 0, 0.45);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: #1a1008;
  background-image: radial-gradient(ellipse at top, #2e1e0a 0%, #1a1008 60%);
  color: var(--parchment);
  font-family: 'Georgia', 'Times New Roman', serif;
  line-height: 1.7;
  min-height: 100vh;
}

header {
  text-align: center;
  padding: 3rem 1.5rem 2rem;
  border-bottom: 2px solid var(--gold);
}

.site-title {
  font-size: clamp(1.8rem, 5vw, 3rem);
  color: var(--gold-light);
  text-shadow: 0 2px 12px var(--shadow);
  letter-spacing: 0.06em;
  font-variant: small-caps;
}

.site-subtitle {
  margin-top: 0.4rem;
  font-size: clamp(0.9rem, 2vw, 1.15rem);
  color: var(--parchment-dark);
  font-style: italic;
}

.divider {
  margin: 1.2rem auto;
  width: 8rem;
  height: 2px;
  background: linear-gradient(to right, transparent, var(--gold), transparent);
}

nav {
  background: rgba(0, 0, 0, 0.35);
  border-bottom: 1px solid var(--gold);
}

nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}

nav ul li a {
  display: block;
  padding: 0.9rem 2rem;
  color: var(--parchment-dark);
  text-decoration: none;
  font-variant: small-caps;
  letter-spacing: 0.08em;
  font-size: 1rem;
  transition: color 0.2s, background 0.2s;
}

nav ul li a:hover,
nav ul li a:focus {
  color: var(--gold-light);
  background: rgba(200, 151, 42, 0.12);
  outline: none;
}

main {
  max-width: 860px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

.page-heading {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  color: var(--gold-light);
  font-variant: small-caps;
  letter-spacing: 0.06em;
  margin-bottom: 0.6rem;
}

.page-intro {
  color: var(--parchment-dark);
  font-style: italic;
  margin-bottom: 2.5rem;
  font-size: 1rem;
}

/* ── Lecture list ─────────────────────────────────────────────── */

.lecture-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.lecture-item {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(200, 151, 42, 0.3);
  border-radius: 4px;
  padding: 1.2rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1rem;
  transition: border-color 0.2s, background 0.2s;
}

.lecture-item:hover {
  border-color: var(--gold);
  background: rgba(200, 151, 42, 0.06);
}

.lecture-date {
  flex: 0 0 auto;
  font-size: 0.82rem;
  color: rgba(200, 151, 42, 0.7);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.lecture-title {
  flex: 1 1 200px;
  font-size: 1.05rem;
  color: var(--parchment);
}

.lecture-link {
  flex: 0 0 auto;
  font-size: 0.9rem;
  color: var(--gold-light);
  text-decoration: none;
  border: 1px solid rgba(200, 151, 42, 0.4);
  border-radius: 3px;
  padding: 0.2rem 0.75rem;
  white-space: nowrap;
  transition: background 0.2s, color 0.2s;
}

.lecture-link:hover,
.lecture-link:focus {
  background: rgba(200, 151, 42, 0.15);
  color: #fff;
  outline: none;
}

.lecture-notes {
  flex: 1 0 100%;
  font-size: 0.9rem;
  color: var(--parchment-dark);
  font-style: italic;
  margin-top: 0.1rem;
}

/* ── Empty state ──────────────────────────────────────────────── */

.empty-state {
  text-align: center;
  padding: 4rem 1rem;
  color: rgba(245, 230, 200, 0.4);
  font-style: italic;
  font-size: 1.05rem;
}

.empty-state span {
  display: block;
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

footer {
  text-align: center;
  padding: 1.5rem 1rem;
  border-top: 1px solid rgba(200, 151, 42, 0.3);
  color: rgba(245, 230, 200, 0.4);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
}