:root {
  --bg: #0d1117;
  --surface: #161b22;
  --border: #30363d;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --accent: #58a6ff;
  --green: #3fb950;
  --yellow: #d29922;
  --red: #f85149;
  --gold: #f0c000;
  --silver: #c0c0c0;
  --bronze: #cd7f32;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

/* Header */
header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

header h1 { font-size: 1.3rem; white-space: nowrap; }

.controls {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

select, input[type="text"], input[type="number"],
input[type="datetime-local"] {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 0.9rem;
}

select { min-width: 220px; }

/* Buttons */
.btn-primary {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 6px 14px;
  font-size: 0.9rem;
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary:hover { opacity: 0.9; }

.btn-secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 14px;
  font-size: 0.9rem;
  cursor: pointer;
}
.btn-secondary:hover { background: var(--surface); }

/* Main layout */
main { padding: 20px 24px; max-width: 1100px; margin: 0 auto; }

.hidden { display: none !important; }

/* Landing page */
.landing {
  max-width: 900px;
  margin: 40px auto;
  padding: 0 24px;
}
.landing-content {
  text-align: center;
}
.landing-image {
  max-width: 100%;
  max-height: 320px;
  border-radius: 12px;
  border: 1px solid var(--border);
  margin-bottom: 24px;
  object-fit: contain;
}
.landing-content h2 {
  font-size: 1.8rem;
  margin-bottom: 16px;
  color: var(--accent);
}
.landing-content > p {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 640px;
  margin: 0 auto 32px;
}
.landing-features {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.landing-feature {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px 20px;
  flex: 1;
  min-width: 200px;
  max-width: 260px;
}
.landing-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: 12px;
}
.landing-feature h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--text);
}
.landing-feature p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}
.landing-cta {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-style: italic;
}

/* Workshop Curriculum */
.workshop-curriculum {
  text-align: left;
  margin: 40px auto 32px;
  max-width: 820px;
}
.curriculum-title {
  font-size: 1.25rem;
  color: var(--accent);
  margin-bottom: 16px;
  text-align: center;
}
.curriculum-table-wrapper {
  overflow-x: auto;
}
.curriculum-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.curriculum-table thead th {
  background: var(--surface);
  color: var(--text-muted);
  font-weight: 600;
  padding: 10px 14px;
  text-align: left;
  border-bottom: 2px solid var(--border);
}
.curriculum-table tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
}
.curriculum-table tbody tr:hover {
  background: rgba(88, 166, 255, 0.06);
}
.curriculum-table td {
  padding: 12px 14px;
  vertical-align: middle;
}
.module-num {
  text-align: center;
  font-weight: 700;
  color: var(--accent);
  width: 50px;
}
.module-title {
  font-weight: 600;
  color: var(--text);
}
.module-learn {
  color: var(--text-muted);
  font-size: 0.85rem;
}
.module-link {
  text-align: center;
  white-space: nowrap;
}
.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  text-decoration: none;
}
.badge-ready {
  background: var(--green);
  color: #fff;
}
.badge-ready:hover {
  opacity: 0.85;
}
.badge-soon {
  background: var(--border);
  color: var(--text-muted);
}

/* Session info */
.session-info {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  margin-bottom: 16px;
  font-size: 0.95rem;
}
.session-info strong { color: var(--accent); }

/* Stats bar */
.session-stats {
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  justify-content: center;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 28px;
  text-align: center;
  flex: 1;
  min-width: 140px;
}
.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  display: block;
}
.stat-label {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 4px;
}
.stat-card.highlight .stat-value { color: var(--green); }

/* ============ PODIUM ============ */
.podium-section {
  background: linear-gradient(180deg, #0a1628 0%, #142240 50%, #0d1b2e 100%);
  border-radius: 16px;
  padding: 40px 20px 24px;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}
.podium-section::before {
  content: '';
  position: absolute;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(88,166,255,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.podium {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  gap: 16px;
  position: relative;
  z-index: 1;
}
.podium-empty {
  text-align: center;
  color: var(--text-muted);
  padding: 40px;
  font-size: 1rem;
}

.podium-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 20px 24px 16px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  min-width: 160px;
  max-width: 200px;
  backdrop-filter: blur(4px);
  position: relative;
}

/* Ordering: 2nd left, 1st center, 3rd right */
.podium-card.rank-2 { order: 1; }
.podium-card.rank-1 { order: 2; margin-bottom: 20px; }
.podium-card.rank-3 { order: 3; }

.podium-card.rank-1 {
  background: rgba(240, 192, 0, 0.06);
  border-color: rgba(240, 192, 0, 0.25);
  min-width: 180px;
  padding: 24px 28px 20px;
}
.podium-card.rank-2 {
  background: rgba(192, 192, 192, 0.04);
  border-color: rgba(192, 192, 192, 0.15);
}
.podium-card.rank-3 {
  background: rgba(205, 127, 50, 0.04);
  border-color: rgba(205, 127, 50, 0.15);
}

.podium-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 3px solid var(--border);
  object-fit: cover;
  background: var(--bg);
}
.podium-card.rank-1 .podium-avatar {
  width: 100px;
  height: 100px;
  border-color: var(--gold);
  box-shadow: 0 0 20px rgba(240, 192, 0, 0.25);
}
.podium-card.rank-2 .podium-avatar {
  border-color: var(--silver);
}
.podium-card.rank-3 .podium-avatar {
  border-color: var(--bronze);
}

.podium-username {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
  text-align: center;
  word-break: break-all;
}
.podium-card.rank-1 .podium-username { font-size: 1.1rem; }

.podium-trophy {
  font-size: 1.8rem;
  line-height: 1;
}
.podium-card.rank-1 .podium-trophy { font-size: 2.2rem; }

.podium-time {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
}

.podium-rank-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.podium-card.rank-1 .podium-rank-label { color: var(--gold); }
.podium-card.rank-2 .podium-rank-label { color: var(--silver); }
.podium-card.rank-3 .podium-rank-label { color: var(--bronze); }

.podium-countdown {
  text-align: center;
  margin-top: 20px;
  position: relative;
  z-index: 1;
}
.podium-countdown .countdown-label {
  color: var(--text-muted);
  font-size: 0.85rem;
}
.podium-countdown .countdown-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin-top: 4px;
}

/* ============ PARTICIPANTS TABLE ============ */
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  overflow-x: auto;
  margin-bottom: 16px;
}
.panel h2 {
  font-size: 1rem;
  margin-bottom: 12px;
  color: var(--text-muted);
}

table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }

th {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
  font-weight: 600;
  white-space: nowrap;
}

td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

tr:hover td { background: rgba(88, 166, 255, 0.05); }

.rank-cell { font-weight: 700; color: var(--text-muted); width: 50px; }
.rank-1-cell { color: var(--gold); }
.rank-2-cell { color: var(--silver); }
.rank-3-cell { color: var(--bronze); }

.user-cell {
  display: flex;
  align-items: center;
  gap: 10px;
}
.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--bg);
}
.user-name {
  font-weight: 500;
}
.user-handle {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.status-badge {
  display: inline-block;
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 600;
}
.status-completed {
  background: var(--green);
  color: #fff;
}
.status-started {
  background: var(--yellow);
  color: #000;
}

/* Feed */
#feed-panel { max-height: 240px; overflow-y: auto; }

#feed-list { list-style: none; }

#feed-list li {
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
}
#feed-list li:last-child { border-bottom: none; }

.feed-time {
  color: var(--text-muted);
  margin-right: 8px;
  font-size: 0.8rem;
}

.feed-avatar {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  vertical-align: middle;
  margin-right: 4px;
  object-fit: cover;
  background: var(--bg);
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  width: 90vw;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
}
.modal h2 { margin-bottom: 16px; }

.modal label {
  display: block;
  margin-bottom: 12px;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.modal label input {
  display: block;
  width: 100%;
  margin-top: 4px;
}

.form-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 16px;
}

.snippet-result {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.snippet-result h3 { color: var(--green); margin-bottom: 8px; }
.snippet-result code {
  background: var(--bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9rem;
  color: var(--accent);
}
.snippet-result pre {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px;
  font-size: 0.8rem;
  overflow-x: auto;
  white-space: pre;
  margin: 8px 0;
  line-height: 1.6;
}

/* Responsive */
@media (max-width: 700px) {
  .podium { gap: 8px; }
  .podium-card { min-width: 100px; padding: 14px 12px; }
  .podium-card.rank-1 { min-width: 120px; }
  .podium-avatar { width: 60px; height: 60px; }
  .podium-card.rank-1 .podium-avatar { width: 76px; height: 76px; }
  .stat-card { padding: 12px 16px; }
}

/* Repo link */
.repo-link {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.8rem;
  word-break: break-all;
}
.repo-link:hover { text-decoration: underline; }

/* Search modal wide */
.modal-wide {
  max-width: 800px;
}
.modal-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 16px;
}
.search-input-row {
  display: flex;
  gap: 8px;
  align-items: center;
}
.search-input-row input {
  flex: 1;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 0.95rem;
}

/* Search user profile */
.search-user-profile {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 12px;
}
.search-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
  background: var(--bg);
}
.search-profile-name {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
}
.search-profile-stats {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Search results */
.search-results {
  margin-top: 16px;
  overflow-x: auto;
}
.search-empty {
  text-align: center;
  color: var(--text-muted);
  padding: 32px 0;
  font-size: 0.95rem;
}