:root {
  --bg: #f6f4ef;
  --surface: #fcfbf8;
  --surface-2: #f0ede7;
  --border: #ddd7cd;
  --text: #242019;
  --muted: #716e67;
  --primary: #0f6d73;
  --primary-soft: #d5e5e3;
  --accent: #9a4f22;
  --shadow: 0 8px 24px rgba(28, 24, 18, 0.08);

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;

  --sidebar-left: 280px;
  --sidebar-right: 320px;
  --topbar-height: 80px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

button,
input {
  font: inherit;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
}

.skip-link:focus {
  left: 16px;
  top: 16px;
  background: #fff;
  color: #000;
  padding: 10px 14px;
  border-radius: 8px;
  z-index: 999;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.app-shell {
  min-height: 100vh;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--topbar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 0 var(--space-6);
  background: rgba(246, 244, 239, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.brand-mark {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: var(--text);
  color: #fff;
  font-weight: 700;
  font-size: 20px;
}

.brand-text h1 {
  margin: 0;
  font-size: 24px;
}

.brand-text p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.topbar-actions {
  display: flex;
  gap: var(--space-3);
}

.layout {
  display: grid;
  grid-template-columns: var(--sidebar-left) minmax(0, 1fr) var(--sidebar-right);
  gap: var(--space-6);
  padding: var(--space-6);
  align-items: start;
}

.sidebar,
.content {
  min-width: 0;
}

.left-sidebar,
.right-sidebar {
  position: sticky;
  top: calc(var(--topbar-height) + 24px);
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
  padding: var(--space-5);
}

.panel + .panel {
  margin-top: var(--space-5);
}

.panel-head {
  margin-bottom: var(--space-4);
}

.panel-head h2 {
  margin: 0;
  font-size: 18px;
}

.panel-head-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
}

.muted {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.eyebrow {
  display: inline-block;
  margin-bottom: var(--space-3);
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
}

.hero-title {
  margin: 0 0 var(--space-3);
  font-size: 36px;
  line-height: 1.1;
}

.hero-text {
  margin: 0;
  max-width: 70ch;
  color: var(--muted);
}

.segmented {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
}

.segmented-btn,
.tag-chip,
.ghost-btn,
.primary-btn {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
  color: var(--text);
  cursor: pointer;
  transition: 0.2s ease;
}

.segmented-btn,
.tag-chip,
.ghost-btn {
  padding: 10px 12px;
}

.segmented-btn:hover,
.tag-chip:hover,
.ghost-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.segmented-btn.active,
.tag-chip.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.primary-btn {
  padding: 10px 14px;
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  font-weight: 600;
}

.primary-btn:hover {
  filter: brightness(0.95);
}

.ghost-btn.small {
  padding: 8px 10px;
}

.tag-list,
.detail-tags,
.event-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tag-chip {
  text-align: left;
}

.stack {
  display: grid;
  gap: var(--space-3);
}

.option-row {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
}

.search-field input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #fff;
  outline: none;
}

.search-field input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(15, 109, 115, 0.12);
}

.timeline-panel,
.events-panel {
  margin-top: var(--space-5);
}

.timeline-tools {
  display: flex;
  gap: var(--space-2);
}

.timeline-ruler {
  position: relative;
  margin-top: var(--space-6);
  padding: 30px 0 20px;
  min-height: 96px;
}

.ruler-line {
  position: absolute;
  top: 38px;
  left: 0;
  right: 0;
  height: 4px;
  border-radius: 999px;
  background: linear-gradient(90deg, #d8d4ce 0%, #c9c3bb 100%);
}

.ruler-point {
  position: absolute;
  top: 18px;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.ruler-dot {
  width: 18px;
  height: 18px;
  border-radius: 999px;
  background: #fff;
  border: 4px solid var(--text);
  box-shadow: 0 0 0 6px rgba(36, 32, 25, 0.05);
}

.ruler-point.active .ruler-dot {
  border-color: var(--accent);
  box-shadow: 0 0 0 8px rgba(154, 79, 34, 0.12);
}

.ruler-label {
  font-size: 13px;
  color: var(--muted);
}

.density-bar {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.density-segment {
  border-radius: 999px;
  min-height: 12px;
  background: #d7d2cb;
}

.density-segment.low {
  height: 12px;
}

.density-segment.medium {
  height: 18px;
  background: #bfcfcd;
}

.density-segment.peak {
  height: 26px;
  background: var(--primary);
}

.event-list {
  display: grid;
  gap: var(--space-4);
}

.event-card {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: var(--space-4);
  padding: var(--space-4);
  border: 1px solid var(--border);
  border-radius: 16px;
  background: #fff;
  transition: 0.2s ease;
  cursor: pointer;
}

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

.event-card.active {
  background: #fbf6f2;
  border-color: #d9b39d;
}

.event-card[hidden] {
  display: none !important;
}

.event-time {
  display: flex;
  flex-direction: column;
  gap: 4px;
  color: var(--muted);
  font-size: 14px;
}

.event-time .hour {
  font-size: 18px;
  color: var(--text);
  font-weight: 700;
}

.event-body h3 {
  margin: 0 0 8px;
  font-size: 20px;
}

.event-body p {
  margin: 0;
  color: var(--muted);
}

.mini-tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text);
  font-size: 12px;
  font-weight: 600;
}

.detail-block + .detail-block {
  margin-top: var(--space-5);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border);
}

.detail-label {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.detail-value,
.detail-text,
.detail-link {
  font-size: 15px;
}

.detail-text {
  margin: 0;
  color: var(--text);
}

.sticky-panel {
  min-height: 320px;
}

@media (max-width: 1200px) {
  .layout {
    grid-template-columns: 260px 1fr;
  }

  .right-sidebar {
    grid-column: 1 / -1;
    position: static;
  }
}

@media (max-width: 860px) {
  .topbar {
    height: auto;
    padding: var(--space-4);
    flex-direction: column;
    align-items: stretch;
  }

  .topbar-actions {
    justify-content: flex-start;
  }

  .layout {
    grid-template-columns: 1fr;
    padding: var(--space-4);
  }

  .left-sidebar,
  .right-sidebar {
    position: static;
    top: auto;
  }

  .hero-title {
    font-size: 28px;
  }

  .event-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .panel {
    padding: var(--space-4);
  }

  .brand-text h1 {
    font-size: 20px;
  }

  .hero-title {
    font-size: 24px;
  }

  .panel-head-row {
    flex-direction: column;
  }

  .timeline-tools {
    width: 100%;
  }

  .timeline-tools .ghost-btn {
    flex: 1;
  }
}