/* =========================
   Base reset & typography
   ========================= */

:root {
  --text: #1a1a2e;
  --muted: #5a6270;
  --bg: #fafbfd;
  --link: #3b7dd8;
  --link-hover: #2a5ca8;
  --border: #e0e4ea;
  --accent: #f0f3f8;
  --code-bg: #f0f3f8;
  --card-bg: #ffffff;
  --header-from: #2c3e6b;
  --header-to: #4a6fa5;
  --badge-scheduled: #2e7d32;
  --badge-completed: #1565c0;
  --badge-cancelled: #c62828;
  --badge-tentative: #e65100;
  --chip-bg: #e8edf5;
  --chip-hover: #d0d8ea;
  --dot-fill: #3b7dd8;
  --dot-glow: #6ca0dc;
  --map-bg: #eef2f7;
  --map-land: #c8d5e0;
  --map-border: #a0b0c0;
  --map-grid: #dde3ea;
  --stats-from: #eef2f9;
  --stats-to: #f5f0fa;
  --detail-from: #f5f7fb;
  --detail-to: #f0f0f8;
  --btn-from: #3b7dd8;
  --btn-to: #5a95e0;
  --cloud-to: #e0e6f2;
  --cloud-border: #c8d0e0;
  --chip-hover-border: #b0bbd0;
  --heading-color: #2c3e6b;
  --notes-bg: #fffbe6;
  --notes-border: #e0dca3;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont,
               "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
}

/* =========================
   Layout
   ========================= */

.container {
  max-width: 920px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem;
}

.site-header {
  background: linear-gradient(135deg, var(--header-from), var(--header-to));
  color: #fff;
  border-bottom: none;
}

.site-header .container {
  padding: 1rem 1.25rem;
}

.site-footer {
  margin-top: 3rem;
  border-top: 1px solid var(--border);
  background: var(--accent);
  font-size: 0.9rem;
  color: var(--muted);
}

/* =========================
   Navigation
   ========================= */

.nav {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.nav-item {
  text-decoration: none;
  color: rgba(255,255,255,0.85);
  font-weight: 500;
  padding: 0.2rem 0;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.nav-item:hover {
  color: #fff;
  border-bottom-color: rgba(255,255,255,0.6);
  text-decoration: none;
}

/* =========================
   Site title in header
   ========================= */

.site-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
  color: #fff;
  letter-spacing: 0.02em;
}

/* =========================
   Headings
   ========================= */

h1, h2, h3, h4 {
  line-height: 1.3;
  margin-top: 2rem;
}

h1 {
  font-size: 2rem;
  margin-top: 0;
  color: var(--header-from);
}

h2 {
  font-size: 1.5rem;
  border-bottom: 2px solid var(--border);
  padding-bottom: 0.3rem;
  color: var(--heading-color);
}

h3 {
  font-size: 1.25rem;
}

/* =========================
   Text & lists
   ========================= */

p {
  margin: 0.75rem 0;
}

ul {
  padding-left: 1.2rem;
}

li {
  margin: 0.75rem 0;
}

/* Compact list items used on index pages */
li > p {
  margin: 0.25rem 0;
}

/* =========================
   Links
   ========================= */

a {
  color: var(--link);
  transition: color 0.15s;
}

a:hover {
  color: var(--link-hover);
}

/* =========================
   Blockquotes (metadata line)
   ========================= */

blockquote {
  margin: 1rem 0;
  padding: 0.5rem 1rem;
  background: var(--accent);
  border-left: 4px solid var(--link);
  color: var(--muted);
  border-radius: 0 6px 6px 0;
}

/* =========================
   Code & pre
   ========================= */

code {
  background: var(--code-bg);
  padding: 0.15rem 0.3rem;
  border-radius: 3px;
  font-size: 0.95em;
}

pre {
  background: var(--code-bg);
  padding: 0.75rem 1rem;
  overflow-x: auto;
  border-radius: 4px;
}

/* =========================
   Details / summary (Canceled section)
   ========================= */

details {
  margin-top: 1rem;
  padding: 0.5rem 0.75rem;
  background: var(--accent);
  border: 1px solid var(--border);
  border-radius: 6px;
}

summary {
  cursor: pointer;
  font-weight: 500;
}

/* =========================
   Tag chips (inline in markdown)
   ========================= */

a code {
  background: var(--chip-bg);
  border: 1px solid var(--border);
}

/* =========================
   Notes block (editable)
   ========================= */

.notes {
  background: var(--notes-bg);
  border: 1px dashed var(--notes-border);
  padding: 0.75rem 1rem;
  margin: 1.5rem 0;
  font-size: 0.95rem;
  border-radius: 6px;
}

/* =========================
   Stats bar
   ========================= */

.stats-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  padding: 0.7rem 1.1rem;
  background: linear-gradient(135deg, var(--stats-from), var(--stats-to));
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 0.92rem;
  color: var(--muted);
  margin-bottom: 1.2rem;
}

.stats-bar strong {
  color: var(--header-from);
  font-size: 1.15em;
}

/* =========================
   Cards + chips board view
   ========================= */

.board {
  margin: 1rem 0 2rem;
}

.board-section {
  margin: 1.5rem 0;
}

.board-section-title {
  font-weight: 700;
  margin: 0 0 0.75rem 0;
  font-size: 1.1rem;
  color: var(--header-from);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 0.9rem;
}

.talk-card {
  grid-column: span 6; /* 2 per row on desktop */
  border: 1px solid var(--border);
  border-left: 4px solid var(--link);
  border-radius: 12px;
  background: var(--card-bg);
  padding: 1rem 1.1rem;
  box-shadow: 0 2px 8px rgba(44,62,107,0.06);
  transition: transform 0.15s, box-shadow 0.15s;
}

.talk-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(44,62,107,0.12);
}

@media (max-width: 900px) {
  .talk-card { grid-column: span 12; } /* 1 per row on small screens */
}

.talk-topline {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.6rem;
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
}

.badge {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: #fff;
  background: var(--badge-completed);
  border: none;
}

.badge-scheduled,
.talk-topline .badge:first-child {
  /* Default status coloring handled below */
}

/* Status-specific badge colors via content matching (applied in Python) */

.talk-title {
  margin: 0.2rem 0 0.4rem 0;
  font-size: 1.05rem;
  line-height: 1.35;
  font-weight: 600;
}

.talk-title a {
  text-decoration: none;
  color: var(--text);
}

.talk-title a:hover {
  color: var(--link);
  text-decoration: underline;
}

.talk-sub {
  color: var(--muted);
  font-size: 0.92rem;
  margin: 0.2rem 0;
}

.talk-sub a {
  color: var(--link);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.6rem;
}

.chip {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--chip-bg);
  font-size: 0.82rem;
  color: var(--text);
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s;
}

.chip:hover {
  background: var(--chip-hover);
  border-color: var(--chip-hover-border);
  color: var(--text);
}

.linkrow {
  margin-top: 0.65rem;
  display: flex;
  gap: 0.9rem;
  font-size: 0.9rem;
}

/* =========================
   Talk detail page
   ========================= */

.talk-detail {
  margin: 1rem 0 1.5rem;
  padding: 1.1rem 1.3rem;
  background: linear-gradient(135deg, var(--detail-from), var(--detail-to));
  border: 1px solid var(--border);
  border-radius: 12px;
}

.talk-detail-badges {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.7rem;
}

.talk-detail-row {
  margin: 0.4rem 0;
  font-size: 0.95rem;
}

.talk-detail-row strong {
  color: var(--header-from);
}

.talk-detail-links {
  margin-top: 0.85rem;
  display: flex;
  gap: 0.6rem;
}

.btn {
  display: inline-block;
  padding: 0.45rem 1.1rem;
  background: linear-gradient(135deg, var(--btn-from), var(--btn-to));
  color: #fff;
  border-radius: 8px;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: 0 2px 6px rgba(59,125,216,0.25);
  transition: transform 0.1s, box-shadow 0.1s;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(59,125,216,0.35);
  color: #fff;
}

/* =========================
   Chip cloud (tags/types index)
   ========================= */

.chip-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
  margin: 1rem 0;
}

.cloud-chip {
  padding: 0.35rem 0.8rem;
  background: linear-gradient(135deg, var(--chip-bg), var(--cloud-to));
  border-color: var(--cloud-border);
  transition: transform 0.1s, background 0.15s;
}

.cloud-chip:hover {
  transform: scale(1.06);
  background: var(--chip-hover);
}

.cloud-chip small {
  color: var(--muted);
  font-size: 0.8em;
}

/* =========================
   Card abstract (collapsible)
   ========================= */

.card-abstract {
  margin-top: 0.5rem;
  padding: 0.4rem 0.6rem;
  font-size: 0.88rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
}

.card-abstract p {
  margin: 0.3rem 0 0;
  color: var(--muted);
}

/* =========================
   World map
   ========================= */

.world-map {
  margin: 1rem 0 1.5rem;
  max-width: 100%;
}

.world-map svg {
  width: 100%;
  height: auto;
  border-radius: 10px;
}

.map-dot .map-label {
  opacity: 0;
  transition: opacity 0.2s;
  pointer-events: none;
  paint-order: stroke;
  stroke: var(--map-bg);
  stroke-width: 3px;
}

.map-dot:hover .map-label {
  opacity: 1;
}

.map-dot:hover circle {
  filter: brightness(1.3);
}

/* =========================
   Calendar view
   ========================= */

.calendar {
  margin: 1rem 0 2rem;
}

.calendar-month {
  margin: 1.5rem 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.calendar-month-header {
  padding: 0.75rem 1rem;
  background: linear-gradient(135deg, var(--header-from), var(--header-to));
  color: #fff;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
}

.calendar-dow {
  padding: 0.5rem 0.5rem;
  font-size: 0.85rem;
  color: var(--muted);
  background: var(--accent);
  border-bottom: 1px solid var(--border);
  text-align: center;
}

.calendar-cell {
  min-height: 100px;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 0.5rem 0.5rem;
}

.calendar-cell:nth-child(7n) {
  border-right: none;
}

.calendar-daynum {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 0.4rem;
}

.calendar-cell.is-empty {
  background: var(--bg);
}

.calendar-item {
  display: block;
  text-decoration: none;
  margin: 0.35rem 0;
}

.calendar-chip {
  display: inline-block;
  max-width: 100%;
  padding: 0.25rem 0.45rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--chip-bg);
  color: var(--text);
  font-size: 0.85rem;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.calendar-meta {
  display: block;
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 0.15rem;
}

/* =========================
   Dark mode
   ========================= */

@media (prefers-color-scheme: dark) {
  :root {
    --text: #e0e4ea;
    --muted: #8a92a0;
    --bg: #12141e;
    --link: #6ca0dc;
    --link-hover: #8cb8e8;
    --border: #2a2e3a;
    --accent: #1a1e2e;
    --code-bg: #1e2230;
    --card-bg: #1a1e2e;
    --header-from: #1e2a4a;
    --header-to: #2a4070;
    --chip-bg: #1e2a3e;
    --chip-hover: #283850;
    --chip-hover-border: #3a4a60;
    --dot-fill: #6ca0dc;
    --dot-glow: #4a80c0;
    --map-bg: #151824;
    --map-land: #252a3a;
    --map-border: #3a4050;
    --map-grid: #1e2230;
    --stats-from: #1a1e2e;
    --stats-to: #1e2238;
    --detail-from: #1a1e2e;
    --detail-to: #1e2238;
    --btn-from: #4a80c0;
    --btn-to: #6ca0dc;
    --cloud-to: #222e42;
    --cloud-border: #2a3a50;
    --heading-color: #8cb8e8;
    --notes-bg: #1e1e14;
    --notes-border: #3a3a20;
    --badge-scheduled: #388e3c;
    --badge-completed: #1e88e5;
    --badge-cancelled: #e53935;
    --badge-tentative: #f57c00;
  }

  .badge {
    opacity: 0.9;
  }

  .talk-card:hover {
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
  }

  .btn {
    box-shadow: 0 2px 6px rgba(0,0,0,0.3);
  }
}

/* =========================
   Small screens
   ========================= */

@media (max-width: 600px) {
  .container {
    padding: 1rem 0.75rem;
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.35rem;
  }

  .nav {
    gap: 0.75rem;
  }

  .stats-bar {
    gap: 1rem;
    font-size: 0.85rem;
  }

  .chip-cloud {
    gap: 0.4rem;
  }

  .talk-detail {
    padding: 0.75rem 1rem;
  }

  .talk-detail-links {
    flex-wrap: wrap;
  }

  .card-grid {
    gap: 0.6rem;
  }
}