* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background:
    radial-gradient(circle at top, rgba(59, 130, 246, 0.2), transparent 35%),
    linear-gradient(180deg, #0b1220 0%, #111827 45%, #0f172a 100%);
  color: #f9fafb;
}

.page {
  display: grid;
  grid-template-columns: 320px minmax(560px, 1fr);
  gap: 24px;
  min-height: 100vh;
  padding: 24px;
  align-items: start;
}

.panel {
  background: rgba(31, 41, 55, 0.88);
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 24px;
  padding: 20px;
  box-shadow: 0 24px 60px rgba(2, 6, 23, 0.38);
  backdrop-filter: blur(12px);
}

h1 {
  margin-top: 0;
  margin-bottom: 8px;
}

.subtitle {
  margin-top: 0;
  color: #cbd5e1;
}

.page-links {
  display: flex;
  gap: 10px;
  margin-bottom: 18px;
}

.page-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  color: #cbd5e1;
  text-decoration: none;
  background: rgba(15, 23, 42, 0.6);
}

.page-link.active {
  color: #f8fafc;
  background: rgba(37, 99, 235, 0.28);
  border-color: rgba(96, 165, 250, 0.35);
}

.room-actions,
.status-box,
.controls-row {
  margin-top: 20px;
}

.auth-box {
  margin-top: 20px;
  padding: 16px;
  border-radius: 18px;
  background: rgba(15, 23, 42, 0.82);
  border: 1px solid rgba(148, 163, 184, 0.12);
}

.auth-status {
  margin-bottom: 12px;
}

.auth-form {
  display: grid;
  gap: 8px;
}

.auth-actions {
  margin-top: 12px;
}

.auth-message {
  margin-bottom: 0;
  color: #cbd5e1;
  line-height: 1.45;
}

.reset-request-panel {
  margin-top: 20px;
  padding: 16px;
  border-radius: 18px;
  background: rgba(30, 41, 59, 0.86);
  border: 1px solid rgba(96, 165, 250, 0.22);
}

.reset-request-text {
  line-height: 1.45;
  color: #e2e8f0;
}

.reset-request-actions {
  display: flex;
  gap: 10px;
  margin-top: 14px;
}

label {
  display: block;
  margin-bottom: 6px;
}

.join-row,
.controls-row {
  display: flex;
  gap: 8px;
}

input,
button {
  border-radius: 10px;
  border: 1px solid #475569;
  font-size: 16px;
}

input {
  flex: 1;
  padding: 10px 12px;
  background: #0f172a;
  color: #f8fafc;
}

button {
  padding: 10px 14px;
  background: #2563eb;
  color: white;
  cursor: pointer;
}

button:hover:enabled {
  background: #1d4ed8;
}

button.secondary-button {
  background: #475569;
  border-color: #334155;
  color: #e2e8f0;
}

button.secondary-button:hover:enabled {
  background: #334155;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.status-box {
  display: grid;
  gap: 10px;
  padding: 16px;
  border-radius: 18px;
  background: rgba(15, 23, 42, 0.82);
  border: 1px solid rgba(148, 163, 184, 0.12);
}

.board-panel {
  display: flex;
  flex-direction: column;
  gap: 18px;
  align-items: center;
  justify-content: center;
  transition: box-shadow 180ms ease, border-color 180ms ease;
}

.board-panel.theme-player-1 {
  box-shadow: 0 24px 60px rgba(127, 29, 29, 0.35);
}

.board-panel.theme-player-2 {
  box-shadow: 0 24px 60px rgba(133, 77, 14, 0.35);
}

.board-panel.theme-winner {
  box-shadow: 0 24px 70px rgba(34, 197, 94, 0.28);
}

.board-panel.theme-draw,
.board-panel.theme-waiting {
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.4);
}

.board-hud,
.board-shell,
.column-buttons,
.board {
  width: min(100%, 720px);
}

.board-hud {
  display: grid;
  gap: 14px;
}

.turn-banner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  border-radius: 22px;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.96), rgba(30, 41, 59, 0.9));
  border: 1px solid rgba(148, 163, 184, 0.18);
  overflow: hidden;
}

.turn-banner::after {
  content: "";
  position: absolute;
  inset: auto -20px -60px auto;
  width: 160px;
  height: 160px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  filter: blur(12px);
}

.turn-banner.player-1 {
  border-color: rgba(248, 113, 113, 0.35);
  background: linear-gradient(135deg, rgba(69, 10, 10, 0.94), rgba(127, 29, 29, 0.86));
}

.turn-banner.player-2 {
  border-color: rgba(250, 204, 21, 0.35);
  background: linear-gradient(135deg, rgba(113, 63, 18, 0.94), rgba(161, 98, 7, 0.86));
}

.turn-banner.winner {
  box-shadow: inset 0 0 0 1px rgba(34, 197, 94, 0.3), 0 18px 30px rgba(34, 197, 94, 0.16);
}

.turn-banner.draw {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.96), rgba(51, 65, 85, 0.88));
}

.turn-badge {
  position: relative;
  z-index: 1;
  min-width: 104px;
  padding: 10px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-align: center;
  color: #e2e8f0;
  background: rgba(15, 23, 42, 0.5);
  border: 1px solid rgba(148, 163, 184, 0.16);
}

.turn-copy {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 6px;
}

.turn-title {
  font-size: 1.2rem;
  font-weight: 700;
}

.turn-subtitle {
  color: #cbd5e1;
  line-height: 1.45;
}

.player-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.player-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(148, 163, 184, 0.14);
  color: #cbd5e1;
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.player-card strong,
.player-card span {
  display: block;
}

.player-dot {
  width: 18px;
  height: 18px;
  border-radius: 999px;
  box-shadow: inset 0 -3px 6px rgba(0, 0, 0, 0.28);
}

.player-card.player-1 .player-dot {
  background: linear-gradient(180deg, #f87171, #dc2626);
}

.player-card.player-2 .player-dot {
  background: linear-gradient(180deg, #fde047, #eab308);
}

.player-card.ready {
  color: #f8fafc;
}

.player-card.active {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.22);
  box-shadow: 0 14px 26px rgba(15, 23, 42, 0.28);
}

.board-shell {
  display: grid;
  gap: 14px;
  padding: 18px;
  border-radius: 26px;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.92), rgba(30, 41, 59, 0.88));
  border: 1px solid rgba(148, 163, 184, 0.16);
}

.column-buttons,
.board {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 10px;
}

.column-button {
  height: 60px;
  display: grid;
  align-content: center;
  justify-items: center;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  box-shadow: inset 0 -3px 0 rgba(0, 0, 0, 0.18);
  transition: transform 140ms ease, box-shadow 140ms ease, filter 140ms ease;
}

.column-button.active-column {
  transform: translateY(-2px);
  box-shadow: 0 14px 24px rgba(15, 23, 42, 0.28), inset 0 -3px 0 rgba(0, 0, 0, 0.18);
}

.column-number {
  font-size: 1rem;
}

.column-action {
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  opacity: 0.82;
}

.column-button.player-1-button {
  background: #dc2626;
  border-color: #b91c1c;
  color: #fff7f7;
}

.column-button.player-1-button:hover:enabled {
  background: #b91c1c;
}

.column-button.player-2-button {
  background: #eab308;
  border-color: #ca8a04;
  color: #111827;
}

.column-button.player-2-button:hover:enabled {
  background: #ca8a04;
}

.column-button.spectator-button {
  background: #475569;
  border-color: #334155;
  color: #e2e8f0;
}

.column-button.spectator-button:hover:enabled {
  background: #334155;
}

.board {
  position: relative;
  padding: 16px;
  background: linear-gradient(180deg, #2563eb 0%, #1d4ed8 45%, #1e40af 100%);
  border-radius: 22px;
  box-shadow: inset 0 -12px 22px rgba(15, 23, 42, 0.35);
  overflow: hidden;
}

.board::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top, rgba(255, 255, 255, 0.14), transparent 45%);
  pointer-events: none;
}

.board.turn-player-1 {
  box-shadow: inset 0 -12px 22px rgba(15, 23, 42, 0.35), 0 20px 36px rgba(127, 29, 29, 0.22);
}

.board.turn-player-2 {
  box-shadow: inset 0 -12px 22px rgba(15, 23, 42, 0.35), 0 20px 36px rgba(133, 77, 14, 0.22);
}

.board.winner-board {
  box-shadow: inset 0 -12px 22px rgba(15, 23, 42, 0.35), 0 20px 40px rgba(34, 197, 94, 0.24);
}

.cell {
  aspect-ratio: 1 / 1;
  position: relative;
  border-radius: 999px;
  background: radial-gradient(circle at 35% 30%, #f8fafc, #cbd5e1 75%);
  border: 4px solid rgba(0, 0, 0, 0.18);
  transition: transform 180ms ease, box-shadow 180ms ease, opacity 180ms ease;
}

.cell.player-1 {
  background: radial-gradient(circle at 35% 30%, #fca5a5, #ef4444 58%, #b91c1c 100%);
  box-shadow: inset 0 -8px 14px rgba(127, 29, 29, 0.34);
}

.cell.player-2 {
  background: radial-gradient(circle at 35% 30%, #fef08a, #facc15 58%, #ca8a04 100%);
  box-shadow: inset 0 -8px 14px rgba(133, 77, 14, 0.34);
}

.cell.hover-column {
  transform: translateY(-1px);
}

.cell.preview {
  opacity: 0.55;
  transform: scale(0.95);
}

.cell.preview.player-1 {
  box-shadow: inset 0 -8px 14px rgba(127, 29, 29, 0.28), 0 0 0 4px rgba(248, 113, 113, 0.18);
}

.cell.preview.player-2 {
  box-shadow: inset 0 -8px 14px rgba(133, 77, 14, 0.28), 0 0 0 4px rgba(250, 204, 21, 0.2);
}

.cell.last-played::after {
  content: "";
  position: absolute;
  inset: -7px;
  border-radius: 999px;
  border: 3px solid rgba(255, 255, 255, 0.55);
  animation: lastMovePulse 1.1s ease-out 2;
}

.cell.dropping {
  animation: tokenDrop 560ms cubic-bezier(0.2, 0.85, 0.32, 1), tokenBounce 560ms ease-out;
}

.cell.winning {
  outline: 5px solid #22c55e;
  outline-offset: 2px;
  animation: winnerPulse 900ms ease-in-out infinite alternate;
}

.leaderboard-page {
  grid-template-columns: 320px minmax(620px, 1fr);
}

.leaderboard-panel {
  display: grid;
  gap: 18px;
}

.leaderboard-header h2 {
  margin: 0 0 8px;
}

.leaderboard-table-wrap {
  overflow-x: auto;
}

.leaderboard-table {
  width: 100%;
  border-collapse: collapse;
  border-radius: 18px;
  overflow: hidden;
  background: rgba(15, 23, 42, 0.78);
  border: 1px solid rgba(148, 163, 184, 0.14);
}

.leaderboard-table th,
.leaderboard-table td {
  padding: 14px 16px;
  text-align: left;
}

.leaderboard-table thead {
  background: rgba(30, 41, 59, 0.92);
}

.leaderboard-table tbody tr:nth-child(odd) {
  background: rgba(255, 255, 255, 0.02);
}

.leaderboard-table tbody tr:hover {
  background: rgba(59, 130, 246, 0.08);
}

@keyframes tokenDrop {
  0% {
    transform: translateY(calc(-1 * var(--drop-distance, 320px))) scale(0.88);
  }
  72% {
    transform: translateY(10px) scale(1.02);
  }
  100% {
    transform: translateY(0) scale(1);
  }
}

@keyframes tokenBounce {
  0% {
    filter: brightness(1);
  }
  70% {
    filter: brightness(1.18);
  }
  100% {
    filter: brightness(1);
  }
}

@keyframes lastMovePulse {
  0% {
    opacity: 0;
    transform: scale(0.84);
  }
  35% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: scale(1.18);
  }
}

@keyframes winnerPulse {
  from {
    transform: scale(1);
    box-shadow: 0 0 0 rgba(34, 197, 94, 0.2);
  }
  to {
    transform: scale(1.04);
    box-shadow: 0 0 22px rgba(34, 197, 94, 0.34);
  }
}

@media (max-width: 980px) {
  .page {
    grid-template-columns: 1fr;
  }

  .leaderboard-page {
    grid-template-columns: 1fr;
  }

  .board-hud,
  .board-shell,
  .column-buttons,
  .board {
    width: 100%;
  }
}

@media (max-width: 680px) {
  .page {
    padding: 16px;
    gap: 16px;
  }

  .panel {
    padding: 16px;
  }

  .page-links {
    flex-wrap: wrap;
  }

  .turn-banner {
    flex-direction: column;
    align-items: flex-start;
  }

  .player-strip {
    grid-template-columns: 1fr;
  }

  .column-buttons,
  .board {
    gap: 7px;
  }

  .board-shell {
    padding: 12px;
  }

  .column-button {
    height: 52px;
  }
}