:root {
  --ink: #1a1a1a;
  --muted: #5e5e5e;
  --paper: #f8f5f0;
  --accent: #124559;
  --accent-2: #c44900;
  --weather: #0b6e4f;
  --politics: #3a0ca3;
  --culture: #b23a48;
  --card: #ffffff;
  --line: #d6cbbd;
  --shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Source Serif Pro", Georgia, serif;
  color: var(--ink);
  background: radial-gradient(1200px 600px at 80% -10%, #f0e7d7 0%, transparent 60%),
    radial-gradient(800px 500px at 10% 10%, #e6efe7 0%, transparent 55%),
    var(--paper);
}

header {
  padding: 32px 24px 12px;
  max-width: 1100px;
  margin: 0 auto;
}

h1 {
  font-size: clamp(28px, 4vw, 44px);
  margin: 0 0 8px;
  letter-spacing: 0.3px;
}

header p {
  margin: 0;
  color: var(--muted);
  max-width: 70ch;
}

.controls {
  margin: 20px 0 0;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid #eadfce;
  border-radius: 14px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  box-shadow: var(--shadow);
}

.controls label {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 14px;
  color: var(--ink);
}

.controls input[type="search"] {
  flex: 1 1 240px;
  border: 1px solid #d7c7b4;
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 14px;
  font-family: "Source Sans Pro", Arial, sans-serif;
}

.controls button {
  border: 1px solid #d7c7b4;
  background: #fffaf2;
  border-radius: 10px;
  padding: 10px 12px;
  cursor: pointer;
  font-family: "Source Sans Pro", Arial, sans-serif;
}

main {
  max-width: 1100px;
  margin: 16px auto 60px;
  padding: 0 24px;
}

.timeline {
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--line);
}

.month-marker {
  font-size: 14px;
  color: var(--muted);
  margin: 26px 0 12px 0;
  font-weight: 600;
  letter-spacing: 0.6px;
  text-transform: uppercase;
}

.card {
  position: relative;
  background: var(--card);
  border-radius: 16px;
  padding: 16px 18px 14px;
  margin-bottom: 18px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--accent);
}

.card::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 22px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--paper);
}

.card h3 {
  margin: 0 0 6px;
  font-size: 18px;
}

.card .description {
  font-size: 14px;
  color: var(--ink);
  margin: 8px 0;
  line-height: 1.5;
}

.card .diaspora-impact {
  font-size: 13px;
  color: var(--muted);
  margin: 8px 0;
  padding: 8px;
  background: rgba(18, 69, 89, 0.05);
  border-left: 2px solid var(--accent);
  line-height: 1.5;
}

.card .meta {
  font-size: 13px;
  color: var(--muted);
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  font-family: "Source Sans Pro", Arial, sans-serif;
  margin-top: 8px;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: #fff;
}

.tag-icon {
  font-size: 10px;
}

.tag.weather {
  background: var(--weather);
}

.tag.politics {
  background: var(--politics);
}

.tag.culture {
  background: var(--culture);
}

.tag.economic {
  background: #1e6091;
}

.tag.legal {
  background: #5e4fa2;
}

.tag.ofw,
.tag.diaspora {
  background: #2563eb;
}

.tag.religious {
  background: #d4a017;
}

.tag.international {
  background: #0d7377;
}

.card a {
  color: var(--accent-2);
  text-decoration: none;
}

.card a:hover {
  text-decoration: underline;
}

.card .dynasties {
  margin-top: 12px;
  padding: 10px;
  background: rgba(58, 12, 163, 0.05);
  border-left: 2px solid var(--politics);
  border-radius: 6px;
  font-size: 13px;
}

.card .dynasties .dynasty-link {
  color: var(--politics);
  font-weight: 500;
}

.card .description,
.card .significance,
.card .diaspora {
  font-size: 14px;
  color: var(--ink);
  margin: 8px 0;
  line-height: 1.6;
}

.empty {
  padding: 22px;
  border: 1px dashed #cdbfac;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.6);
  color: var(--muted);
}

.methodology {
  max-width: 1100px;
  margin: 0 auto 60px;
  padding: 16px 24px;
  background: #ffffff;
  border-radius: 12px;
  box-shadow: var(--shadow);
  font-size: 13px;
  color: var(--muted);
}

.methodology h2 {
  margin: 0 0 8px;
  font-size: 15px;
  color: var(--ink);
}

.methodology p {
  margin: 0 0 8px;
}

.methodology ul {
  margin: 0;
  padding-left: 18px;
}

.methodology a {
  color: var(--accent);
  text-decoration: none;
}

.methodology a:hover {
  text-decoration: underline;
}

@media (max-width: 720px) {
  header {
    padding: 24px 18px 10px;
  }

  main {
    padding: 0 18px;
  }

  .timeline {
    padding-left: 0;
  }

  .timeline::before,
  .card::before {
    display: none;
  }

  .card {
    border-left: 6px solid var(--accent);
  }
}

/* Accessibility utilities */
.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;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--ink);
  color: #fff;
  padding: 8px 16px;
  z-index: 1000;
  text-decoration: none;
  font-family: "Source Sans Pro", Arial, sans-serif;
}

.skip-link:focus {
  top: 0;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}