/* ── Chronos — Maailmanhistorian aikajana ──────────────────────────────── */

:root {
  --bg: #0c0c10;
  --bg-surface: #141418;
  --bg-card: #1c1c24;
  --bg-card-hover: #24242e;
  --text: #e8e8f0;
  --text-dim: #7a7a90;
  --text-muted: #50506a;
  --accent: #7c6cf0;
  --accent-dim: rgba(124, 108, 240, 0.15);
  --accent-glow: rgba(124, 108, 240, 0.3);
  --gold: #f0c050;
  --green: #50d890;
  --red: #f05060;
  --blue: #5090f0;
  --orange: #f08040;
  --border: #2a2a38;
  --border-light: #3a3a48;
  --radius: 10px;
  --radius-sm: 6px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Playfair Display', Georgia, serif;
  --header-h: 56px;
  --year-h: 44px;
  --region-h: 52px;
  --filter-h: 44px;
  --top-offset: calc(var(--header-h) + var(--year-h) + var(--region-h) + var(--filter-h));
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── Header ──────────────────────────────────────────────────────────── */

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(12, 12, 16, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
}

.header-left {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.logo {
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--accent);
  letter-spacing: -0.5px;
}

.tagline {
  font-size: 12px;
  color: var(--text-dim);
  letter-spacing: 0.5px;
}

.btn-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text-dim);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}
.btn-icon:hover {
  background: var(--bg-card);
  color: var(--text);
  border-color: var(--accent);
}

/* ── Year indicator ──────────────────────────────────────────────────── */

.year-indicator {
  position: sticky;
  top: var(--header-h);
  z-index: 90;
  height: var(--year-h);
  background: rgba(12, 12, 16, 0.85);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--border);
}

.year-text {
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--gold);
  letter-spacing: 1px;
}

/* ── Region bar ──────────────────────────────────────────────────────── */

.region-bar {
  position: sticky;
  top: calc(var(--header-h) + var(--year-h));
  z-index: 80;
  height: var(--region-h);
  background: rgba(12, 12, 16, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 8px;
  overflow-x: auto;
}

.region-tags {
  display: flex;
  gap: 8px;
  flex-wrap: nowrap;
}

.region-tag {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text);
  white-space: nowrap;
  cursor: default;
  transition: all 0.2s;
}

.region-tag .color-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.region-tag .remove-btn {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: none;
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}
.region-tag .remove-btn:hover {
  background: var(--red);
  color: #fff;
}

.btn-add-region {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px dashed var(--border-light);
  background: transparent;
  color: var(--text-dim);
  font-size: 13px;
  font-family: var(--font);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s;
}
.btn-add-region:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

/* ── Filter bar ──────────────────────────────────────────────────────── */

.filter-bar {
  position: sticky;
  top: calc(var(--header-h) + var(--year-h) + var(--region-h));
  z-index: 80;
  height: var(--filter-h);
  background: rgba(12, 12, 16, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 20px;
  overflow-x: auto;
  scrollbar-width: none;
}
.filter-bar::-webkit-scrollbar { display: none; }

.filter-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.filter-chips {
  display: flex;
  gap: 6px;
  flex-wrap: nowrap;
}

.filter-chip {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 4px 12px;
  font-size: 0.78rem;
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
  font-family: var(--font);
}
.filter-chip:hover {
  border-color: var(--accent);
  color: var(--text);
}
.filter-chip.active {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 500;
}

/* ── Timeline container ──────────────────────────────────────────────── */

.timeline-container {
  padding: 0 20px;
  min-height: calc(100vh - var(--top-offset));
}

.timeline-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 50vh;
  color: var(--text-muted);
  font-size: 15px;
}
.timeline-empty.hidden { display: none; }

.timeline-columns {
  display: grid;
  gap: 16px;
  padding-bottom: 100px;
}
.timeline-columns.hidden { display: none; }

/* ── Era divider ─────────────────────────────────────────────────────── */

.era-divider {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 32px 0 16px;
}

.era-divider .era-year {
  font-family: var(--font-display);
  font-size: 28px;
  color: var(--gold);
  white-space: nowrap;
  flex-shrink: 0;
}

.era-divider .era-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--border-light), transparent);
}

.era-divider .era-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  white-space: nowrap;
}

/* ── Event row ───────────────────────────────────────────────────────── */

.event-row {
  display: contents;
}

/* ── Event card ──────────────────────────────────────────────────────── */

.event-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
}

.event-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-light);
  transform: translateY(-1px);
}

.event-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  border-radius: 3px 0 0 3px;
}

.event-card .event-year-badge {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.event-card .event-year-badge .significance-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}
.significance-dot.high { background: var(--gold); }
.significance-dot.medium { background: var(--text-dim); }
.significance-dot.low { background: var(--text-muted); }

.event-card .event-title {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 4px;
}

.event-card .event-desc {
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.event-card .event-type-badge {
  display: inline-block;
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--accent-dim);
  color: var(--accent);
  margin-top: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ── Empty column placeholder ────────────────────────────────────────── */

.event-card.empty {
  border-style: dashed;
  border-color: var(--border);
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60px;
  cursor: default;
}
.event-card.empty:hover {
  transform: none;
  background: transparent;
}
.event-card.empty .event-desc {
  color: var(--text-muted);
  font-style: italic;
  text-align: center;
}

/* ── Column headers (sticky in grid) ─────────────────────────────────── */

.column-header {
  position: sticky;
  top: var(--top-offset);
  z-index: 70;
  background: var(--bg);
  padding: 12px 0 8px;
  text-align: center;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  border-bottom: 2px solid var(--border);
}

/* ── "Samaan aikaan" highlight ────────────────────────────────────────── */

.event-card.highlight {
  border-color: var(--gold);
  box-shadow: 0 0 12px rgba(240, 192, 80, 0.1);
}

/* ── Modals ──────────────────────────────────────────────────────────── */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}
.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  width: 90%;
  max-width: 520px;
  max-height: 80vh;
  overflow-y: auto;
  padding: 20px;
}
.modal.modal-sm { max-width: 360px; }

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}
.modal-header h3 {
  font-size: 16px;
  font-weight: 600;
}

.btn-close {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: none;
  background: var(--bg-card);
  color: var(--text-dim);
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}
.btn-close:hover { background: var(--red); color: #fff; }

.modal-search {
  width: 100%;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  font-size: 14px;
  font-family: var(--font);
  outline: none;
  margin-bottom: 16px;
  transition: border-color 0.2s;
}
.modal-search:focus { border-color: var(--accent); }

.region-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 8px;
}

.region-option {
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
  text-align: center;
  transition: all 0.15s;
}
.region-option:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
}
.region-option.active {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}
.region-option .region-count {
  display: block;
  font-size: 10px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ── Jump modal ──────────────────────────────────────────────────────── */

.jump-form { display: flex; flex-direction: column; gap: 12px; }
.jump-input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  font-size: 18px;
  font-family: var(--font);
  outline: none;
  text-align: center;
}
.jump-input:focus { border-color: var(--accent); }

.jump-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
}
.jump-presets button {
  padding: 6px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-dim);
  font-size: 12px;
  font-family: var(--font);
  cursor: pointer;
  transition: all 0.15s;
}
.jump-presets button:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}

.btn-primary {
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  background: var(--accent);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: all 0.2s;
}
.btn-primary:hover { opacity: 0.9; }

/* ── Event detail modal ──────────────────────────────────────────────── */

#eventContent {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
}
#eventContent .detail-year {
  font-family: var(--font-display);
  font-size: 24px;
  color: var(--gold);
  margin-bottom: 8px;
}
#eventContent .detail-region {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
}
#eventContent .detail-desc { margin-bottom: 16px; color: var(--text); }
#eventContent .detail-wiki {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 6px;
  background: var(--accent-dim);
  color: var(--accent);
  text-decoration: none;
  font-size: 13px;
  transition: all 0.15s;
}
#eventContent .detail-wiki:hover { background: var(--accent); color: #fff; }

#eventContent .same-time {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
#eventContent .same-time h4 {
  font-size: 13px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 10px;
}
#eventContent .same-time-item {
  padding: 8px 12px;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  margin-bottom: 6px;
  font-size: 13px;
}
#eventContent .same-time-item .st-region {
  font-size: 11px;
  color: var(--text-muted);
}

/* ── Loading ─────────────────────────────────────────────────────────── */

.loading-more {
  grid-column: 1 / -1;
  text-align: center;
  padding: 30px;
  color: var(--text-muted);
  font-size: 13px;
}

/* ── Scrollbar ───────────────────────────────────────────────────────── */

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ── Responsive ──────────────────────────────────────────────────────── */

@media (max-width: 640px) {
  .header { padding: 0 14px; }
  .tagline { display: none; }
  .timeline-container { padding: 0 10px; }
  .region-bar { padding: 0 10px; }
  .filter-bar { padding: 0 10px; }
  .filter-chip { padding: 3px 8px; font-size: 0.72rem; }

  .timeline-columns {
    gap: 10px;
  }

  .event-card {
    padding: 10px 12px;
  }

  .era-divider .era-year {
    font-size: 22px;
  }

  .modal { padding: 16px; }
  .region-grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); }
}

/* ── Event thumbnails ────────────────────────────────────── */

.event-thumb {
  width: 100%;
  height: 120px;
  overflow: hidden;
  border-radius: 6px;
  margin-bottom: 8px;
}

.event-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.3s ease;
}

.event-card:hover .event-thumb img {
  transform: scale(1.05);
}

/* Person portrait: circular crop */
.event-thumb.person-thumb {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  margin: 0 auto 8px;
  border: 2px solid var(--border-light);
}

/* Detail modal image */
.detail-image {
  width: 100%;
  max-height: 300px;
  overflow: hidden;
  border-radius: 8px;
  margin-bottom: 16px;
}

.detail-image img {
  width: 100%;
  max-height: 300px;
  object-fit: cover;
  display: block;
}

.detail-image.person-image {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  margin: 0 auto 16px;
  border: 3px solid var(--accent);
}

.detail-image.person-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}