@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --primary: #473059;
  --primary-light: #6d4f85;
  --primary-lighter: #9d7ab8;
  --accent: #c72e76;
  --bg: #f9fafb;
  --bg-card: #ffffff;
  --text: #1f2937;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --shadow: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.05);
  --radius: 8px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Type colors */
  --color-networking: #c72e76;
  --color-demo: #008264;
  --color-panel: #25a789;
  --color-hands-on: #e6b736;
  --color-master-class: #8f0043;
  --color-conversation: #9d7ab8;
  --color-special: #00523f;
  --color-one-on-one: #cb9b15;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

a:hover {
  text-decoration: underline;
}

/* Navigation */
.site-header {
  background: var(--primary);
  color: white;
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
}

.site-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: white;
  padding: 1.1rem 0;
  text-decoration: none;
  white-space: nowrap;
}

.site-logo:hover {
  text-decoration: none;
  opacity: 0.9;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 0;
}

.nav-links a {
  color: rgba(255,255,255,0.85);
  padding: 1.1rem 1.15rem;
  display: block;
  font-size: 0.95rem;
  font-weight: 500;
  transition: background 0.15s;
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a.active {
  background: rgba(255,255,255,0.15);
  color: white;
  text-decoration: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
}

/* Main content */
.main-content {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.page-header {
  margin-bottom: 1.25rem;
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.35rem;
}

.page-subtitle {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Filter bar */
.filter-bar-sentinel {
  height: 1px;
  margin: 0;
  padding: 0;
}

.filter-bar {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.6rem;
  margin-bottom: 1rem;
  padding: 1.4rem 1.5rem 0.65rem;
  border-top: 3px solid transparent;
  border-bottom: none;
  background: #ddd5e5;
  position: sticky;
  top: 3.45rem; /* below the sticky header */
  z-index: 90;
  transition: border-top-color 0.2s ease;
}

.filter-bar.is-stuck {
  border-top: 3px solid var(--primary);
}

.filter-group:first-child {
  grid-column: 1 / -1;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.filter-label {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.filter-select,
.filter-search {
  font-size: 0.85rem;
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: white;
  color: var(--text);
  font-family: var(--font);
  width: 100%;
}

.filter-select {
  cursor: pointer;
  appearance: none;
  padding-right: 2rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M3 5l3 3 3-3'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.6rem center;
}

.filter-select:focus,
.filter-search:focus {
  outline: 2px solid var(--primary-light);
  outline-offset: -1px;
  border-color: var(--primary-light);
}

.filter-search::placeholder {
  color: #9ca3af;
}

.session-count {
  font-size: 0.8rem;
  color: var(--text-muted);
  grid-column: 1 / -1;
  margin: 0;
  padding: 0;
}

/* Day groups */
.day-group {
  margin-bottom: 2.5rem;
}

.day-heading {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text);
  padding: 0.75rem 0 0.75rem;
  border-bottom: 4px solid var(--primary);
  margin-bottom: 1rem;
  position: sticky;
  top: 0; /* JS will set the actual offset */
  z-index: 80;
  background: #ebe6f0;
  box-shadow: 0 -2rem 0 0 var(--bg);
}

/* Time slot groups */
.time-slot {
  margin-bottom: 1rem;
}

.time-slot-heading {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.2px;
  padding: 0.4rem 0;
  margin-bottom: 0;
}

.time-slot-events {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* Event cards */
.event-card {
  display: grid;
  grid-template-columns: 160px 1fr;
  grid-template-rows: auto auto auto auto;
  gap: 0;
  background: var(--tint, var(--bg-card));
  border: 1px solid var(--border);
  border-left: 5px solid var(--primary);
  border-radius: var(--radius);
  padding: 0;
  transition: all 0.15s;
}

.event-card:hover {
  border-color: var(--border-left-color, var(--primary));
  box-shadow: var(--shadow-md);
}

/* Pass border-left-color through for hover outline */
.event-card[data-type="Networking"]         { --border-left-color: var(--color-networking); }
.event-card[data-type="Demo"]               { --border-left-color: var(--color-demo); }
.event-card[data-type="Panel"]              { --border-left-color: var(--color-panel); }
.event-card[data-type="Hands-on"]           { --border-left-color: var(--color-hands-on); }
.event-card[data-type="Master Class"]       { --border-left-color: var(--color-master-class); }
.event-card[data-type="NICAR Conversation"] { --border-left-color: var(--color-conversation); }
.event-card[data-type="Special"]            { --border-left-color: var(--color-special); }
.event-card[data-type="One-on-one"]         { --border-left-color: var(--color-one-on-one); }

/* Left accent + background tint by type */
.event-card[data-type="Networking"]        { border-left-color: var(--color-networking); --tint: rgba(199, 46, 118, 0.07); --tint-meta: rgba(199, 46, 118, 0.12); }
.event-card[data-type="Demo"]              { border-left-color: var(--color-demo); --tint: rgba(0, 130, 100, 0.07); --tint-meta: rgba(0, 130, 100, 0.12); }
.event-card[data-type="Panel"]             { border-left-color: var(--color-panel); --tint: rgba(37, 167, 137, 0.07); --tint-meta: rgba(37, 167, 137, 0.12); }
.event-card[data-type="Hands-on"]          { border-left-color: var(--color-hands-on); --tint: rgba(230, 183, 54, 0.07); --tint-meta: rgba(230, 183, 54, 0.12); }
.event-card[data-type="Master Class"]      { border-left-color: var(--color-master-class); --tint: rgba(143, 0, 67, 0.07); --tint-meta: rgba(143, 0, 67, 0.12); }
.event-card[data-type="NICAR Conversation"] { border-left-color: var(--color-conversation); --tint: rgba(157, 122, 184, 0.08); --tint-meta: rgba(157, 122, 184, 0.14); }
.event-card[data-type="Special"]           { border-left-color: var(--color-special); --tint: rgba(0, 82, 63, 0.07); --tint-meta: rgba(0, 82, 63, 0.12); }
.event-card[data-type="One-on-one"]        { border-left-color: var(--color-one-on-one); --tint: rgba(203, 155, 21, 0.07); --tint-meta: rgba(203, 155, 21, 0.12); }

/* Row 1 left: time */
.event-meta {
  grid-column: 1;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.2rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  background: var(--tint-meta, #f7f7f9);
  border-right: 1px solid var(--border);
  padding: 0.6rem 0.9rem;
}

.event-time {
  font-weight: 600;
  color: var(--text);
  font-size: 0.82rem;
  white-space: nowrap;
}

.event-date {
  display: none;
}

/* Full-width divider between top and bottom sections */
.event-card-divider {
  grid-column: 1 / -1;
  grid-row: 2;
  height: 1px;
  background: var(--border);
}

/* Row 3 left: room */
.event-room {
  grid-column: 1;
  grid-row: 3;
  font-size: 0.78rem;
  color: var(--text);
  line-height: 1.3;
  background: var(--tint-meta, #f7f7f9);
  border-right: 1px solid var(--border);
  padding: 0.45rem 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.event-room::before {
  content: '';
  display: inline-block;
  width: 12px;
  height: 12px;
  flex-shrink: 0;
  background: currentColor;
  opacity: 0.5;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M21 10c0 7-9 13-9 13s-9-6-9-13a9 9 0 0 1 18 0z'/%3E%3Ccircle cx='12' cy='10' r='3'/%3E%3C/svg%3E") center/contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M21 10c0 7-9 13-9 13s-9-6-9-13a9 9 0 0 1 18 0z'/%3E%3Ccircle cx='12' cy='10' r='3'/%3E%3C/svg%3E") center/contain no-repeat;
}

/* Row 1 right: title + tags */
.event-header {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 0.75rem 1rem;
}

.event-title {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
}

.event-title a {
  color: var(--primary);
}

.event-title a:hover {
  color: var(--primary-light);
  text-decoration: underline;
}

/* Tags — filled pill style */
.event-tags {
  display: flex;
  gap: 0.3rem;
  flex-wrap: wrap;
  align-items: center;
}

.event-type {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  color: white;
  background: var(--primary);
  white-space: nowrap;
}

.event-type--networking { background: var(--color-networking); }
.event-type--demo { background: var(--color-demo); }
.event-type--panel { background: var(--color-panel); }
.event-type--hands-on { background: var(--color-hands-on); }
.event-type--master-class { background: var(--color-master-class); }
.event-type--conversation { background: var(--color-conversation); }
.event-type--special { background: var(--color-special); }
.event-type--one-on-one { background: var(--color-one-on-one); }

.event-tracks {
  display: inline;
}

.track-tag {
  font-size: 0.68rem;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  background: white;
}

/* Row 3 right: speakers */
.event-speakers-detail {
  grid-column: 2;
  grid-row: 3;
  display: flex;
  gap: 0.3rem;
  flex-wrap: wrap;
  align-items: center;
  padding: 0.4rem 1rem;
}

.speaker-pill {
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  border: 1px solid #d1d5db;
  color: var(--text);
  background: #f9fafb;
  white-space: nowrap;
}

/* Row 4: expandable details */
.event-details {
  grid-column: 1 / -1;
  grid-row: 4;
  margin-top: 0;
  padding: 0.5rem 1rem;
  border-top: 1px solid var(--border);
}

.event-details-toggle {
  font-size: 0.8rem;
  color: var(--primary);
  cursor: pointer;
  font-weight: 500;
}

.event-details-toggle:hover {
  text-decoration: underline;
}

.event-description {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-top: 0.5rem;
  max-width: 700px;
}

.event-skill-detail {
  font-size: 0.8rem;
  color: var(--text);
  margin-top: 0.15rem;
  font-weight: 600;
}

/* Hidden states */
.session-card.hidden,
.event-card.hidden,
.day-group.hidden,
.time-slot.hidden {
  display: none;
}

/* Tables (tracks.html) */
.schedule-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.schedule-table thead {
  background: var(--primary);
  color: white;
}

.schedule-table th {
  padding: 0.6rem 0.75rem;
  text-align: left;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.schedule-table td {
  padding: 0.6rem 0.75rem;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
  vertical-align: top;
}

.schedule-table tbody tr:hover {
  background: #f3eef8;
}

/* Track buttons */
.track-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
}

.track-btn {
  font-family: var(--font);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: white;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.track-btn:hover {
  border-color: var(--primary-light);
  color: var(--primary);
}

.track-btn.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.track-count {
  font-weight: 400;
  opacity: 0.7;
}

.track-section {
  margin-bottom: 2rem;
}

.track-day-heading {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--primary);
  margin-bottom: 0.5rem;
  margin-top: 1.25rem;
}

.track-day-heading:first-child {
  margin-top: 0;
}

.track-day-sessions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

/* Calendar grid */
.calendar-controls {
  margin-bottom: 1rem;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  min-height: 400px;
}

.calendar-day {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.5rem;
  min-width: 0;
}

.cal-day-header {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary);
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--accent);
  margin-bottom: 0.4rem;
}

.cal-event {
  padding: 0.4rem;
  margin-bottom: 0.35rem;
  border-radius: 4px;
  border-left: 3px solid var(--primary-light);
  background: #f3eef8;
  font-size: 0.78rem;
}

.cal-event-title {
  font-weight: 600;
  display: block;
  line-height: 1.3;
}

.cal-event-time {
  color: var(--text-muted);
  font-size: 0.72rem;
}

.cal-event-date {
  display: none;
}

.cal-event.hidden {
  display: none;
}

/* Session detail */
.session-detail {
  max-width: 800px;
}

.session-detail .detail-title {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.session-detail .detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.session-detail .detail-description {
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.session-detail .detail-speakers {
  margin-top: 1rem;
}

.session-detail .detail-speakers h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

/* Footer */
.site-footer {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.site-footer a {
  color: var(--primary);
}

/* Session cards grid (for any remaining grid pages) */
.sessions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 0.75rem;
}

.session-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.session-title {
  font-size: 1rem;
  font-weight: 600;
}

.session-title a {
  color: var(--text);
}

.session-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Bookmark button */
.bookmark-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  padding: 0.3rem 0.6rem;
  font-size: 0.75rem;
  font-family: var(--font);
  font-weight: 500;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: all 0.15s;
  white-space: nowrap;
  z-index: 5;
}

.bookmark-btn:hover {
  border-color: var(--primary-light);
  color: var(--primary);
}

.bookmark-btn.saved {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.bookmark-btn.saved:hover {
  background: var(--primary-light);
  border-color: var(--primary-light);
}

/* Calendar event color coding */
.cal-event[data-type="Networking"]          { border-left-color: var(--color-networking); background: rgba(199, 46, 118, 0.08); }
.cal-event[data-type="Demo"],
.cal-event[data-type="demo"]               { border-left-color: var(--color-demo); background: rgba(0, 130, 100, 0.08); }
.cal-event[data-type="Panel"]              { border-left-color: var(--color-panel); background: rgba(37, 167, 137, 0.08); }
.cal-event[data-type="Hands-on"]           { border-left-color: var(--color-hands-on); background: rgba(230, 183, 54, 0.08); }
.cal-event[data-type="Master Class"]       { border-left-color: var(--color-master-class); background: rgba(143, 0, 67, 0.08); }
.cal-event[data-type="NICAR Conversation"] { border-left-color: var(--color-conversation); background: rgba(157, 122, 184, 0.1); }
.cal-event[data-type="Special"]            { border-left-color: var(--color-special); background: rgba(0, 82, 63, 0.08); }
.cal-event[data-type="One-on-one"]         { border-left-color: var(--color-one-on-one); background: rgba(203, 155, 21, 0.08); }

/* Nav badge for saved count */
.nav-badge {
  background: var(--accent);
  color: white;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.1rem 0.4rem;
  border-radius: 10px;
  margin-left: 0.35rem;
  vertical-align: middle;
}

/* My Schedule empty state */
.my-schedule-empty {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--text-muted);
}

.my-schedule-empty h2 {
  font-size: 1.25rem;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.my-schedule-empty p {
  font-size: 0.9rem;
  max-width: 500px;
  margin: 0 auto;
  line-height: 1.6;
}

.my-schedule-empty a {
  color: var(--primary);
  font-weight: 500;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--primary);
    box-shadow: var(--shadow-md);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 0.75rem 1rem;
    border-top: 1px solid rgba(255,255,255,0.1);
  }

  .event-card {
    grid-template-columns: 1fr;
    border-left-width: 5px;
  }

  .event-meta {
    grid-column: 1;
    grid-row: 1;
    flex-direction: row;
    gap: 0.5rem;
    border-right: none;
    padding: 0.65rem 0.9rem;
    background: #f7f7f9;
  }

  .event-room {
    grid-column: 1;
    grid-row: 2;
    border-right: none;
    background: #f7f7f9;
    border-top: 1px solid #e5e5ea;
    padding: 0.35rem 0.9rem;
  }

  .event-card-divider {
    grid-column: 1;
    grid-row: 3;
  }

  .event-header {
    grid-column: 1;
    grid-row: 4;
    padding: 0.75rem 0.9rem;
  }

  .event-speakers-detail {
    grid-column: 1;
    grid-row: 5;
    padding: 0.3rem 0.9rem;
  }

  .event-details {
    grid-column: 1;
    grid-row: 6;
  }

  .sessions-grid {
    grid-template-columns: 1fr;
  }

  .calendar-grid {
    grid-template-columns: 1fr;
  }

  .schedule-table {
    font-size: 0.8rem;
  }

  .schedule-table th,
  .schedule-table td {
    padding: 0.4rem 0.5rem;
  }

  .filter-bar {
    grid-template-columns: 1fr;
  }
}