:root {
  --bg-dark: #0a1428;
  --bg-ocean: #0d1f3f;
  --bg-panel: #1a2847;
  --text: #e0f0ff;
  --muted: #90b0d8;
  --accent-blue: #4da6ff;
  --accent-cyan: #40e0d0;
  --accent-gold: #ffd700;
  --accent-orange: #ffa500;
  --accent-green: #50fa7b;
  --accent-red: #ff6b6b;
  --accent-purple: #bd93f9;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.6);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  overflow: hidden;
}

body {
  background: radial-gradient(circle at top, #1e3a5f, var(--bg-dark) 70%);
  color: var(--text);
  font-family: "Lexend", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

/* Header */
.app-header {
  padding: 16px 24px;
  border-bottom: 2px solid var(--accent-cyan);
  background: linear-gradient(180deg, var(--bg-ocean), transparent);
}

.title-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  flex-wrap: wrap;
}

.help-btn {
  margin-left: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--accent-cyan);
  background: var(--bg-panel);
  color: var(--accent-cyan);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s;
  font-weight: 700;
}

.help-btn:hover {
  background: var(--accent-cyan);
  color: var(--bg-dark);
  box-shadow: 0 0 15px var(--accent-cyan);
}

.help-btn:active {
  transform: translateY(1px);
}

.limit-badge,
.game-title {
  font-size: 32px;
  font-weight: 900;
  color: var(--accent-cyan);
  line-height: 1;
  text-shadow: 0 0 10px var(--accent-cyan);
}

.tagline {
  font-family: "Space Mono", monospace;
  font-size: 16px;
  color: var(--accent-gold);
  text-shadow: 0 0 8px var(--accent-gold);
  white-space: nowrap;
}

.game-info {
  display: flex;
  gap: 32px;
  margin-top: 8px;
  flex-wrap: wrap;
}

.round-info,
.pot-info {
  font-family: "Space Mono", monospace;
  font-size: 14px;
}

.round-info .label,
.pot-info .label {
  color: var(--muted);
}

.round-info .value,
.pot-info .value {
  color: var(--accent-gold);
  font-weight: 700;
  margin-left: 8px;
}

/* Layout */
.layout {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 16px;
  padding: 16px;
  height: calc(100vh - 140px);
}

.ocean {
  background: linear-gradient(135deg, #0a3d62 0%, #001f3f 100%);
  border-radius: 16px;
  box-shadow: var(--shadow);
  overflow: hidden;
  border: 2px solid var(--accent-cyan);
  position: relative;
}

.ocean::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 20px,
    rgba(64, 224, 208, 0.03) 20px,
    rgba(64, 224, 208, 0.03) 40px
  );
  pointer-events: none;
}

.right-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow-y: auto;
}

/* Arena */
.arena {
  position: absolute;
  inset: 0;
  padding: 20px;
}

.center-area {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
}

.nugget-pot {
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
  border: 2px solid var(--accent-gold);
  border-radius: 14px;
  padding: 10px 20px;
  text-align: center;
  box-shadow: 0 0 20px rgba(255, 215, 0, 0.5);
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

.pot-label {
  font-size: 11px;
  color: var(--bg-dark);
  font-family: "Space Mono", monospace;
  font-weight: 700;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.pot-amount {
  font-size: 24px;
  font-weight: 900;
  color: var(--bg-dark);
  font-family: "Space Mono", monospace;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.sea-area {
  display: flex;
  gap: 16px;
  align-items: center;
}

.pile {
  width: 110px;
  height: 150px;
  border-radius: 12px;
  background: linear-gradient(135deg, #1e5f8f 0%, #0d3a5f 100%);
  border: 3px solid var(--accent-cyan);
  box-shadow: 0 0 20px rgba(64, 224, 208, 0.4);
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.sea-count {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--bg-dark);
  color: var(--accent-cyan);
  font-family: "Space Mono";
  font-size: 16px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  border: 2px solid var(--accent-cyan);
}

.sea-label {
  font-family: "Space Mono", monospace;
  font-size: 13px;
  color: var(--accent-cyan);
  font-weight: 700;
  text-shadow: 0 0 8px var(--accent-cyan);
  text-align: center;
}

/* Players Container */
.players-container {
  position: relative;
  width: 100%;
  height: 100%;
}

.player-seat {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  max-width: 250px;
}

.player-info {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  background: var(--bg-panel);
  border: 2px solid #4a5f80;
  border-radius: 12px;
  padding: 10px 12px;
  box-shadow: var(--shadow);
  min-width: 130px;
  position: relative;
}

.player-seat.active .player-info {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 25px rgba(64, 224, 208, 0.6);
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    box-shadow: 0 0 25px rgba(64, 224, 208, 0.6);
  }
  50% {
    box-shadow: 0 0 35px rgba(64, 224, 208, 0.9);
  }
}

.player-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  border: 3px solid #4a5f80;
  background: #0d1428;
  box-shadow: var(--shadow);
  background-size: cover;
  background-position: center;
  font-size: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.player-seat.active .player-avatar {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 20px rgba(64, 224, 208, 0.5);
}

.player-seat.eliminated .player-avatar {
  opacity: 0.3;
  filter: grayscale(1);
}

.player-name {
  font-weight: 700;
  font-size: 15px;
  color: var(--text);
  text-align: center;
}

.player-nuggets {
  font-family: "Space Mono", monospace;
  font-size: 14px;
  color: var(--accent-gold);
  font-weight: 700;
}

.player-cards-count {
  font-family: "Space Mono", monospace;
  font-size: 12px;
  color: var(--muted);
  font-style: italic;
}

/* Player hands */
.player-hand {
  display: flex;
  gap: 6px;
  margin-top: 8px;
  flex-wrap: wrap;
  justify-content: center;
  max-width: 240px;
}

/* Coprime Pairs Display */
.coprime-pairs {
  margin-top: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: center;
}

.pairs-label {
  font-size: 11px;
  color: var(--accent-gold);
  font-weight: 700;
  font-family: "Space Mono", monospace;
}

.pairs-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  justify-content: center;
  max-width: 240px;
}

.pair-badge {
  background: linear-gradient(135deg, var(--accent-green), var(--accent-cyan));
  color: var(--bg-dark);
  padding: 3px 8px;
  border-radius: 12px;
  font-family: "Space Mono", monospace;
  font-size: 11px;
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* Cards */
.card {
  width: 45px;
  height: 63px;
  border-radius: 6px;
  background: linear-gradient(180deg, #ffffff 0%, #f0f4ff 100%);
  color: #222;
  border: 2px solid #d0d8e6;
  box-shadow: var(--shadow);
  position: relative;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 4px;
  font-family: "Space Mono", monospace;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}

.card.selected {
  transform: translateY(-6px) scale(1.05);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(64, 224, 208, 0.8);
}

.card .rank {
  font-weight: 700;
  font-size: 12px;
}

.card .suit {
  font-size: 14px;
  text-align: right;
}

.card.hearts,
.card.diamonds {
  color: #dc143c;
}

.card.spades,
.card.clubs {
  color: #0d0f1a;
}

.card.back {
  background: radial-gradient(circle at 30% 30%, var(--accent-cyan), #1a3a5f);
  border-color: var(--accent-cyan);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  letter-spacing: 0.5px;
  font-size: 9px;
  cursor: default;
}

.card.back:hover {
  transform: none;
  box-shadow: var(--shadow);
}

/* Panels */
.status-box,
.controls-box,
.history-box {
  background: var(--bg-panel);
  border: 2px solid var(--accent-cyan);
  border-radius: 14px;
  padding: 16px;
  box-shadow: var(--shadow);
}

.status-box {
  display: flex;
  justify-content: space-around;
  text-align: center;
}

.status-item .label {
  font-size: 12px;
  color: var(--muted);
  display: block;
}

.status-item .value {
  display: block;
  font-size: 22px;
  font-weight: 700;
  font-family: "Space Mono";
  margin-top: 4px;
  color: var(--accent-cyan);
}

.controls-box {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.question {
  text-align: center;
  font-weight: 700;
  color: var(--accent-cyan);
  font-size: 16px;
  padding: 8px;
  background: rgba(64, 224, 208, 0.1);
  border-radius: 8px;
}

.player-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ask-card-actions,
.play-pair-actions,
.go-fish-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.action-label {
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
}

.action-select {
  width: 100%;
  padding: 10px;
  border-radius: 8px;
  border: 2px solid var(--accent-cyan);
  background: var(--bg-dark);
  color: var(--text);
  font-family: "Space Mono", monospace;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
}

.action-select:hover {
  background: var(--bg-ocean);
  box-shadow: 0 0 10px rgba(64, 224, 208, 0.3);
}

.action-select:focus {
  outline: none;
  box-shadow: 0 0 15px rgba(64, 224, 208, 0.5);
}

.action-btn {
  padding: 12px;
  border-radius: 10px;
  border: none;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.action-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(64, 224, 208, 0.4);
}

.action-btn:active {
  transform: translateY(0);
}

.action-btn.primary {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
}

.action-btn.secondary {
  background: linear-gradient(135deg, #6c757d, #495057);
}

.instruction-text {
  text-align: center;
  color: var(--accent-gold);
  font-size: 14px;
  margin: 0;
  font-weight: 600;
}

.pair-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 250px;
  overflow-y: auto;
  padding: 4px;
}

.pair-option {
  padding: 12px;
  border-radius: 8px;
  border: 2px solid var(--accent-cyan);
  background: var(--bg-dark);
  color: var(--text);
  font-family: "Space Mono", monospace;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
}

.pair-option::before {
  content: "▶";
  position: absolute;
  left: -8px;
  color: var(--accent-cyan);
  opacity: 0;
  transition: all 0.2s;
}

.pair-option:hover {
  background: var(--bg-ocean);
  box-shadow: 0 0 12px rgba(64, 224, 208, 0.4);
  transform: translateX(8px);
  border-color: var(--accent-gold);
}

.pair-option:hover::before {
  opacity: 1;
  left: 6px;
}

.pair-option .cards {
  font-weight: 700;
  color: var(--accent-cyan);
}

.pair-option .explanation {
  font-size: 11px;
  color: var(--muted);
}

.hidden {
  display: none !important;
}

/* History */
.history-box h3 {
  margin: 0 0 10px;
  text-align: center;
  color: var(--accent-cyan);
  font-size: 16px;
}

.history-list {
  margin: 0;
  padding-left: 20px;
  max-height: 200px;
  overflow-y: auto;
  overflow-x: hidden;
}

.history-list li {
  margin: 4px 0;
  padding: 4px 0;
  font-family: "Space Mono";
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
}

.history-list li.highlight {
  color: var(--accent-cyan);
  font-weight: 700;
}

.history-list li.warning {
  color: var(--accent-gold);
}

.history-list li.error {
  color: var(--accent-red);
}

.history-list li.success {
  color: var(--accent-green);
}

/* Overlays */
.overlay {
  position: fixed;
  inset: 0;
  display: none;
  place-items: center;
  background: rgba(10, 20, 40, 0.92);
  backdrop-filter: blur(8px);
  z-index: 100;
}

.overlay.visible {
  display: grid;
}

.overlay .card {
  background: var(--bg-dark);
  border: 2px solid var(--accent-cyan);
  border-radius: 20px;
  padding: 32px;
  box-shadow: 0 0 40px rgba(64, 224, 208, 0.3);
  color: var(--text);
  max-width: 90vw;
  max-height: 85vh;
  overflow-y: auto;
}

.overlay .card h2 {
  margin: 0 0 20px;
  color: var(--accent-cyan);
  font-size: 28px;
  text-shadow: 0 0 10px var(--accent-cyan);
}

.overlay .card h3 {
  color: var(--accent-gold);
  font-size: 20px;
  margin: 20px 0 10px;
}

.overlay .card h4 {
  color: var(--accent-green);
  font-size: 16px;
  margin: 14px 0 8px;
}

.overlay .card p,
.overlay .card ul,
.overlay .card ol {
  margin: 10px 0;
  line-height: 1.7;
}

.overlay .card ul,
.overlay .card ol {
  padding-left: 28px;
}

.overlay .card li {
  margin: 6px 0;
}

/* Instructions overlay */
.instructions {
  width: min(1100px, 90vw);
  min-height: 60vh;
}

.instructions-content {
  max-height: 60vh;
  overflow-y: auto;
  padding-right: 10px;
}

.countdown {
  margin-top: 20px;
  text-align: center;
  color: var(--accent-gold);
  font-family: "Space Mono";
  font-size: 18px;
  font-weight: 700;
}

button.primary {
  width: 100%;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  border: none;
  color: #fff;
  padding: 14px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 16px;
  cursor: pointer;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  transition: transform 0.2s;
  box-shadow: 0 4px 15px rgba(64, 224, 208, 0.3);
}

button.primary:hover {
  transform: scale(1.02);
  box-shadow: 0 6px 20px rgba(64, 224, 208, 0.5);
}

button.primary:active {
  transform: scale(0.98);
}

/* Setup overlay */
.setup {
  width: min(950px, 90vw);
  min-height: 50vh;
  max-height: 85vh;
  overflow-y: auto;
}

.setup form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.setup label {
  display: block;
  color: var(--text);
  font-size: 14px;
  font-weight: 700;
}

.setup input,
.setup select {
  width: 100%;
  padding: 12px;
  margin-top: 6px;
  border-radius: 8px;
  background: var(--bg-dark);
  color: var(--text);
  border: 2px solid var(--accent-cyan);
  font-size: 14px;
}

#playerSetupContainer {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.player-setup {
  background: var(--bg-panel);
  border: 2px solid #4a5f80;
  border-radius: 12px;
  padding: 16px;
}

.player-setup h4 {
  margin: 0 0 12px;
  color: var(--accent-cyan);
}

.avatar-preview {
  width: 80px;
  height: 80px;
  border: 3px solid var(--accent-cyan);
  border-radius: 12px;
  padding: 10px;
  background: var(--bg-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 8px 0;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.avatar-preview img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.avatar-preview:hover {
  border-color: var(--accent-gold);
  box-shadow: 0 4px 16px rgba(64, 224, 208, 0.4);
}

.change-avatar-btn {
  width: 100%;
  padding: 10px;
  border: 2px solid var(--accent-cyan);
  border-radius: 8px;
  background: var(--bg-panel);
  color: var(--accent-cyan);
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
  margin-top: 8px;
}

.change-avatar-btn:hover {
  background: var(--accent-cyan);
  color: var(--bg-dark);
  box-shadow: 0 0 15px rgba(64, 224, 208, 0.3);
}

/* Avatar selection modal */
.avatar-modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 20, 40, 0.92);
  backdrop-filter: blur(8px);
  z-index: 200;
}

.avatar-modal.hidden {
  display: none;
}

.avatar-modal-content {
  background: var(--bg-dark);
  border: 2px solid var(--accent-cyan);
  border-radius: 20px;
  padding: 32px;
  box-shadow: 0 0 40px rgba(64, 224, 208, 0.3);
  max-width: 90vw;
  max-height: 85vh;
  overflow-y: auto;
}

.avatar-modal-content h3 {
  margin: 0 0 20px;
  color: var(--accent-cyan);
  font-size: 24px;
  text-align: center;
}

.avatar-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.avatar-option {
  width: 80px;
  height: 80px;
  border: 3px solid var(--accent-cyan);
  border-radius: 12px;
  padding: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  background: var(--bg-panel);
  display: flex;
  align-items: center;
  justify-content: center;
}

.avatar-option img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.avatar-option:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 12px rgba(64, 224, 208, 0.6);
  border-color: var(--accent-gold);
}

.avatar-option.selected {
  border-color: var(--accent-gold);
  box-shadow: 0 0 20px rgba(255, 215, 0, 0.5);
}

.avatar-modal-close {
  width: 100%;
  padding: 12px;
  border: 2px solid var(--muted);
  border-radius: 10px;
  background: var(--bg-panel);
  color: var(--text);
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
}

.avatar-modal-close:hover {
  background: var(--muted);
  color: var(--bg-dark);
}

/* Game over overlay */
.gameover {
  width: min(650px, 90vw);
  min-height: 40vh;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
}

.gameover h2 {
  font-size: 38px;
  margin: 0;
  text-shadow: 0 0 20px var(--accent-cyan);
}

.gameover p {
  font-size: 18px;
  margin: 0;
}

.final-score-display {
  font-size: 26px;
  font-weight: 700;
  color: var(--accent-gold);
  font-family: "Space Mono";
}

.gameover-actions {
  display: flex;
  gap: 12px;
  width: 100%;
  max-width: 400px;
}

.gameover-actions button {
  flex: 1;
}

.chip {
  padding: 10px 16px;
  border-radius: 999px;
  border: 2px solid var(--accent-cyan);
  background: var(--bg-panel);
  color: var(--accent-cyan);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}

.chip:hover {
  background: var(--accent-cyan);
  color: var(--bg-dark);
  box-shadow: 0 0 15px var(--accent-cyan);
}

/* Help overlay */
.help {
  width: min(1200px, 92vw);
  max-height: 85vh;
  min-height: 60vh;
}

.help-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.help-content {
  max-height: 70vh;
  overflow-y: auto;
  padding-right: 10px;
}

.close-btn {
  background: var(--bg-panel);
  border: 2px solid var(--accent-cyan);
  color: var(--accent-cyan);
  border-radius: 8px;
  font-size: 20px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  transition: all 0.2s;
  font-weight: 700;
}

.close-btn:hover {
  background: var(--accent-cyan);
  color: var(--bg-dark);
  box-shadow: 0 0 15px var(--accent-cyan);
}

/* Responsive */
@media (max-width: 1200px) {
  .layout {
    grid-template-columns: 1fr 380px;
  }
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
    height: auto;
  }

  body {
    overflow-y: auto;
  }

  .right-panel {
    height: auto;
  }
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-dark);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb {
  background: var(--accent-cyan);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-blue);
}