/**
 * Leaderboard Module — RFDD.org (S4)
 * Arcade high-score board: CRT scanlines, neon glow, monospace score column.
 */
.leaderboard { padding: 120px 20px 80px; }
.leaderboard__inner { max-width: 760px; margin: 0 auto; }
.leaderboard__head { text-align: center; margin-bottom: 26px; }
.leaderboard__title {
  font-size: clamp(34px, 7vw, 60px);
  letter-spacing: 0.04em;
  background: var(--rfdd-gradient-wide);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  text-shadow: 0 0 40px rgba(57, 255, 20, 0.35);
}
.leaderboard__sub { color: var(--rfdd-text-secondary); }

.leaderboard__tabs { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; margin-bottom: 18px; }
.leaderboard__tabgroup {
  display: inline-flex;
  background: var(--rfdd-dark-card);
  border: 1px solid var(--rfdd-border);
  border-radius: 999px;
  padding: 4px;
}
.leaderboard__tab {
  font-family: var(--rfdd-font-nav);
  font-size: 13px; font-weight: 600;
  padding: 8px 16px;
  border: none; background: transparent;
  color: var(--rfdd-text-secondary);
  border-radius: 999px; cursor: pointer;
  transition: color var(--rfdd-transition), background var(--rfdd-transition);
}
.leaderboard__tab.is-active { background: var(--rfdd-gradient); color: var(--rfdd-dark); }
.leaderboard__tab:not(.is-active):hover { color: var(--rfdd-neon-green); }

/* CRT shell */
.leaderboard__crt {
  position: relative;
  background: var(--rfdd-dark-card);
  border: 1px solid var(--rfdd-border);
  border-radius: var(--rfdd-radius-lg);
  padding: 10px;
  box-shadow: var(--rfdd-glow-green), inset 0 0 60px rgba(0, 245, 255, 0.05);
  overflow: hidden;
}
.leaderboard__crt::after {
  content: '';
  position: absolute; inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0) 0px,
    rgba(0, 0, 0, 0) 2px,
    rgba(0, 0, 0, 0.18) 3px
  );
  mix-blend-mode: multiply;
  border-radius: var(--rfdd-radius-lg);
}

.leaderboard__list { list-style: none; margin: 0; padding: 0; }
.leaderboard__row {
  display: grid;
  grid-template-columns: 44px 40px 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--rfdd-border);
}
.leaderboard__row:last-child { border-bottom: none; }
.leaderboard__row--top { background: rgba(57, 255, 20, 0.04); }
.leaderboard__row--1 { box-shadow: inset 3px 0 0 var(--rfdd-neon-green); }
.leaderboard__row--2 { box-shadow: inset 3px 0 0 var(--rfdd-neon-cyan); }
.leaderboard__row--3 { box-shadow: inset 3px 0 0 var(--rfdd-neon-blue); }

.leaderboard__rank {
  font-family: var(--rfdd-font-display);
  font-size: 20px; text-align: center; color: var(--rfdd-text-secondary);
}
.leaderboard__avatar {
  width: 36px; height: 36px;
  border-radius: 9px;
  display: grid; place-items: center;
  font-family: var(--rfdd-font-display);
  font-size: 16px; color: #00150a;
}
.leaderboard__name {
  font-family: var(--rfdd-font-nav);
  font-weight: 600; font-size: 15px;
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.leaderboard__creator { color: var(--rfdd-neon-blue); }
.leaderboard__value {
  font-family: 'Courier New', monospace;
  font-weight: 700; font-size: 18px;
  color: var(--rfdd-neon-cyan);
  text-shadow: 0 0 12px rgba(0, 245, 255, 0.5);
  white-space: nowrap;
}
.leaderboard__badge {
  font-size: 9px; text-transform: uppercase; letter-spacing: 0.05em;
  padding: 2px 7px; border-radius: 999px;
}
.leaderboard__badge--synced { background: rgba(0, 245, 255, 0.16); color: var(--rfdd-neon-cyan); }
.leaderboard__badge--self { background: rgba(255, 255, 255, 0.08); color: var(--rfdd-text-muted); }
.leaderboard__tier {
  font-family: var(--rfdd-font-nav);
  font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em;
  padding: 2px 8px; border-radius: 999px;
  background: rgba(57, 255, 20, 0.12); color: var(--rfdd-neon-green);
  border: 1px solid var(--rfdd-border-hover);
}
.leaderboard__streak { font-size: 11px; font-weight: 700; color: #ffb347; white-space: nowrap; }
.leaderboard__loading, .leaderboard__empty { padding: 28px; text-align: center; color: var(--rfdd-text-muted); }
.leaderboard__footnote { margin-top: 16px; text-align: center; font-size: 12px; color: var(--rfdd-text-muted); }

@media (max-width: 480px) {
  .leaderboard__row { grid-template-columns: 32px 32px 1fr auto; gap: 8px; padding: 10px 8px; }
  .leaderboard__value { font-size: 15px; }
  .leaderboard__name { font-size: 13px; }
}