/* ── Reset & variables ─────────────────────────────────────────────────────── */

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

:root {
  --bg:         #0d0d14;
  --surface:    #16161f;
  --surface2:   #1e1e2a;
  --border:     #26263a;
  --text:       #e6e6f0;
  --muted:      #6a6a8a;
  --accent:     #c9a040;
  --radius:     10px;
  --transition: 0.15s ease;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  font-size: 15px;
  line-height: 1.5;
}

/* ── Header ────────────────────────────────────────────────────────────────── */

header {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--border);
  gap: 0.5rem;
}

.logo {
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--accent);
  text-transform: uppercase;
}

nav {
  display: flex;
  gap: 0.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.2rem;
}

.tab {
  padding: 0.35rem 1rem;
  border: none;
  background: transparent;
  color: var(--muted);
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: color var(--transition), background var(--transition);
}
.tab:hover  { color: var(--text); }
.tab.active { background: var(--surface2); color: var(--text); }

.header-actions {
  display: flex;
  gap: 0.4rem;
  justify-content: flex-end;
}

/* ── Layout ────────────────────────────────────────────────────────────────── */

main { padding: 1.25rem; }

.view { display: none; }
.view.active { display: block; }

/* ── Compare: arena ────────────────────────────────────────────────────────── */

.arena {
  display: grid;
  grid-template-columns: 1fr 2rem 1fr;
  gap: 0.75rem;
  align-items: start;
  max-width: 860px;
  margin: 0 auto 1.25rem;
}

.vs {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--muted);
  text-align: center;
  padding-top: 10.5rem;
}

/* ── Movie card ─────────────────────────────────────────────────────────────── */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s, opacity 0.25s, transform 0.15s, box-shadow 0.2s;
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.card:hover {
  border-color: rgba(201, 160, 64, 0.5);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.card.voting-disabled {
  cursor: default;
  pointer-events: none;
}

.card.winner { border-color: var(--accent); }
.card.loser  { opacity: 0.45; }

.poster-wrap {
  position: relative;
  aspect-ratio: 2 / 3;
  background: var(--surface2);
  overflow: hidden;
}
.poster-wrap img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}
.poster-wrap img.hidden { display: none; }

.poster-placeholder {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 3rem; color: var(--border);
}

.card-body { padding: 0.75rem; }

.movie-title {
  font-size: 0.88rem;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 0.15rem;
}

.movie-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.6rem;
}
.movie-year { font-size: 0.75rem; color: var(--muted); }
.card-elo {
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: 0.3rem;
}

.reveal-btn {
  width: 100%;
  padding: 0.4rem;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.75rem;
  font-family: inherit;
  transition: border-color var(--transition), color var(--transition);
}
.reveal-btn:hover { border-color: var(--accent); color: var(--text); }

.reveal-content {
  margin-top: 0.6rem;
  padding-top: 0.6rem;
  border-top: 1px solid var(--border);
}
.reveal-content.hidden { display: none; }

.card-rating {
  font-size: 0.82rem;
  color: var(--accent);
  margin-bottom: 0.35rem;
  font-weight: 500;
}

.card-review {
  font-size: 0.75rem;
  color: var(--muted);
  line-height: 1.5;
  font-style: italic;
}

/* ── Vote buttons ────────────────────────────────────────────────────────────── */

.vote-row {
  display: flex;
  justify-content: center;
  margin: 0 auto 1rem;
}

.vote {
  padding: 0.6rem 2rem;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 500;
  font-family: inherit;
  transition: all var(--transition);
  -webkit-tap-highlight-color: transparent;
}
.vote:hover    { border-color: var(--accent); color: var(--text); }
.vote:disabled { opacity: 0.3; cursor: not-allowed; }

/* ── Leaderboard ──────────────────────────────────────────────────────────────── */

#lb-wrap {
  max-width: 860px;
  margin: 0 auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.lb-header,
.lb-row {
  display: grid;
  grid-template-columns: 2.2rem 2.4rem 1fr 5.5rem 3.5rem 3rem;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
}

.lb-header {
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.lb-row {
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}
.lb-row:last-child { border-bottom: none; }
.lb-row:hover { background: var(--surface); }

.lb-rank {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  text-align: right;
}
.lb-rank.gold   { color: #f5c842; }
.lb-rank.silver { color: #b0b0c8; }
.lb-rank.bronze { color: #c07840; }

.lb-thumb {
  width: 2rem;
  aspect-ratio: 2/3;
  object-fit: cover;
  border-radius: 3px;
  background: var(--border);
  display: block;
}
.lb-thumb-empty {
  width: 2rem;
  aspect-ratio: 2/3;
  background: var(--surface2);
  border-radius: 3px;
  border: 1px solid var(--border);
}

.lb-title  { font-size: 0.82rem; font-weight: 500; }
.lb-year   { font-size: 0.68rem; color: var(--muted); }
.lb-star   { font-size: 0.78rem; color: var(--accent); }
.lb-elo    { font-size: 0.82rem; font-weight: 600; text-align: right; }
.lb-games  { font-size: 0.68rem; color: var(--muted); text-align: right; }

.num { text-align: right; }

/* ── Buttons ────────────────────────────────────────────────────────────────── */

.import-btn {
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 500;
  font-family: inherit;
  transition: all var(--transition);
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
}
.import-btn:hover    { border-color: var(--accent); color: var(--text); }
.import-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ── Toast ───────────────────────────────────────────────────────────────────── */

.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  font-size: 0.85rem;
  z-index: 100;
  transition: opacity 0.3s;
  white-space: nowrap;
}
.toast.hidden { opacity: 0; pointer-events: none; }

/* ── Empty state ─────────────────────────────────────────────────────────────── */

.hidden { display: none; }

.empty-state {
  text-align: center;
  padding: 4rem 1.5rem;
  color: var(--muted);
  line-height: 2;
}
.empty-state .import-btn {
  margin-top: 1rem;
  color: var(--text);
  border-color: var(--accent);
  padding: 0.5rem 1.25rem;
}

/* ── Loading skeleton ────────────────────────────────────────────────────────── */

.skeleton {
  background: linear-gradient(90deg, var(--surface2) 25%, var(--border) 50%, var(--surface2) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
  border-radius: 4px;
}

@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ── Mobile ──────────────────────────────────────────────────────────────────── */

@media (max-width: 500px) {
  header {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
    padding: 0.6rem 0.75rem;
    gap: 0.5rem;
  }

  .logo { grid-column: 1; grid-row: 1; }

  .header-actions {
    grid-column: 2; grid-row: 1;
    justify-content: flex-end;
  }

  nav {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-content: center;
  }

  .tab { flex: 1; text-align: center; }

  /* Hide Backup/Restore on mobile — still accessible via leaderboard */
  #backup-btn, #restore-btn { display: none; }

  main { padding: 0.75rem; }

  .arena {
    grid-template-columns: 1fr 1.5rem 1fr;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
  }

  .vs { padding-top: 8rem; font-size: 0.55rem; }

  .card-body { padding: 0.5rem; }
  .movie-title { font-size: 0.8rem; }
  .reveal-btn { font-size: 0.7rem; padding: 0.35rem; }

  .vote { padding: 0.7rem 2rem; font-size: 0.82rem; }

  /* Leaderboard: hide "My rating" column on small screens */
  .lb-header,
  .lb-row {
    grid-template-columns: 1.8rem 2rem 1fr 3rem 2.5rem;
    gap: 0.4rem;
    padding: 0.45rem 0.6rem;
  }
  .lb-star { display: none; }
  .lb-header span:nth-child(4) { display: none; }
  .lb-title { font-size: 0.78rem; }
  .lb-elo   { font-size: 0.78rem; }
}