/* ── Variables ─────────────────────────────────────────────────────────────── */
:root {
  --green-900: #1b4332;
  --green-700: #2d6a4f;
  --green-500: #40916c;
  --green-400: #52b788;
  --green-100: #d8f3dc;
  --green-50:  #f0faf4;

  --gray-900: #111827;
  --gray-700: #374151;
  --gray-500: #6b7280;
  --gray-200: #e5e7eb;
  --gray-100: #f3f4f6;
  --white:    #ffffff;

  --radius:     14px;
  --shadow-md:  0 4px 24px rgba(0,0,0,.10);
  --transition: .25s ease;
}

/* ── Reset ─────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
  height: 100%;
  overflow: hidden; /* no scrolling — it's a display */
}
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--gray-100);
  color: var(--gray-900);
  display: flex;
  flex-direction: column;
}
img { display: block; max-width: 100%; }

/* ── Header ────────────────────────────────────────────────────────────────── */
.display-header {
  background: linear-gradient(135deg, var(--green-900) 0%, var(--green-700) 100%);
  color: var(--white);
  padding: 0 2rem;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}
.header-logo {
  display: flex;
  align-items: baseline;
  gap: .6rem;
}
.logo-icon   { font-size: 1.6rem; align-self: center; }
.logo-text   { font-size: 1.6rem; font-weight: 800; letter-spacing: -.02em; }
.logo-tagline {
  font-size: .85rem;
  opacity: .7;
  font-weight: 400;
  letter-spacing: 0;
}
.header-meta {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}
.stat-pill {
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 999px;
  padding: .3rem .9rem;
  font-size: .9rem;
  font-weight: 600;
}
.live-clock {
  font-size: .95rem;
  font-weight: 500;
  opacity: .85;
}

/* ── Main layout ───────────────────────────────────────────────────────────── */
.display-main {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 1.5rem;
  padding: 1.5rem 2rem;
  min-height: 0; /* allow children to shrink */
}

/* ── Panels ────────────────────────────────────────────────────────────────── */
.panel {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
}
.panel-heading {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--gray-900);
  padding: 1rem 1.25rem .75rem;
  flex-shrink: 0;
}

/* ── Carousel ──────────────────────────────────────────────────────────────── */
.carousel-panel { }

.carousel-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.carousel-inner {
  flex: 1;
  position: relative;
  background: var(--gray-900);
  min-height: 0;
}
.carousel-track {
  position: absolute;
  inset: 0;
}
.carousel-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity .6s ease;
}
.carousel-slide.active { opacity: 1; }
.carousel-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.carousel-no-photo {
  width: 100%; height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--green-900);
  font-size: 5rem;
}
.carousel-caption {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: linear-gradient(transparent, rgba(0,0,0,.78));
  padding: 2.5rem 1.25rem 1.1rem;
  color: var(--white);
}
.carousel-desc {
  font-size: 1.2rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: .75rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.carousel-user {
  display: flex;
  align-items: center;
  gap: .65rem;
}
.user-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid rgba(255,255,255,.5);
  flex-shrink: 0;
}
.user-avatar-fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--green-500);
  font-size: .95rem;
  font-weight: 700;
  color: var(--white);
}
.carousel-user-info {
  display: flex;
  flex-direction: column;
  gap: .1rem;
  flex: 1;
  min-width: 0;
}
.user-name {
  font-size: .95rem;
  font-weight: 700;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.user-handle {
  font-size: .8rem;
  opacity: .7;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.carousel-time {
  font-size: .8rem;
  opacity: .65;
  white-space: nowrap;
  margin-left: auto;
  flex-shrink: 0;
}
.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .65rem 1.25rem;
  flex-shrink: 0;
  border-top: 1px solid var(--gray-200);
}
.carousel-btn {
  background: none;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  width: 34px; height: 34px;
  font-size: 1rem;
  cursor: pointer;
  color: var(--gray-700);
  transition: background var(--transition);
}
.carousel-btn:hover { background: var(--gray-100); }
#carousel-dots { display: flex; gap: .45rem; align-items: center; }
.dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--gray-200);
  transition: background var(--transition), transform var(--transition);
}
.dot.active { background: var(--green-500); transform: scale(1.4); }

/* ── Leaderboard ───────────────────────────────────────────────────────────── */
.leaderboard-panel { }

.lb-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem .75rem;
  flex-shrink: 0;
}
.lb-header .panel-heading { padding: 0; }

.period-badge {
  font-size: .8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  background: var(--green-100);
  color: var(--green-700);
  border-radius: 999px;
  padding: .25rem .75rem;
  transition: opacity .3s;
}

#leaderboard-list {
  list-style: none;
  flex: 1;
  overflow-y: auto;
  padding: .25rem 0 .75rem;
}

.lb-row {
  display: grid;
  grid-template-columns: 3rem 1fr auto;
  align-items: center;
  gap: .5rem;
  padding: .8rem 1.25rem;
  transition: background var(--transition);
}
.lb-row:hover { background: var(--gray-100); }

.lb-rank {
  font-size: 1.3rem;
  text-align: center;
}
.lb-name {
  font-size: 1rem;
  font-weight: 500;
  color: var(--gray-700);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.lb-count {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--green-500);
  min-width: 2rem;
  text-align: right;
}

.rank-1 .lb-name  { color: var(--gray-900); font-weight: 700; }
.rank-1 .lb-count { color: var(--green-700); }

/* ── States ────────────────────────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 2.5rem 1rem;
  color: var(--gray-500);
  font-size: 1rem;
}
.loading-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: 2rem;
  color: var(--gray-500);
  font-size: .95rem;
}
.spinner {
  width: 18px; height: 18px;
  border: 2px solid var(--gray-200);
  border-top-color: var(--green-500);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  display: inline-block;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }