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

:root {
  --bg: #0f0f1a;
  --surface: #1a1a2e;
  --accent: #e94560;
  --accent2: #0f3460;
  --text: #eaeaea;
  --text-dim: #8888aa;
  --gold: #f5c842;
  --green: #2ecc71;
  --board-dark: #16213e;
  --board-light: #1a1a2e;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  -webkit-user-select: none;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100%;
  height: 100dvh;
  max-width: 500px;
  margin: 0 auto;
  padding-top: var(--safe-top);
  padding-bottom: var(--safe-bottom);
  padding-left: var(--safe-left);
  padding-right: var(--safe-right);
}

/* ===== Wallet Bar ===== */

#wallet-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 14px;
  background: var(--surface);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  font-size: 11px;
  flex-shrink: 0;
}

#wallet-status {
  display: flex;
  align-items: center;
  gap: 6px;
}

#user-pfp {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

#user-pfp.hidden { display: none; }

#wallet-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-dim);
  flex-shrink: 0;
  transition: background 0.3s;
}

#wallet-dot.connected {
  background: var(--green);
}

#wallet-addr {
  color: var(--text-dim);
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 11px;
}

#wallet-addr.username {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--text);
  font-weight: 600;
}

#wallet-info {
  display: flex;
  gap: 8px;
  color: var(--text-dim);
  font-size: 10px;
}

#wallet-chain {
  background: var(--accent2);
  padding: 1px 6px;
  border-radius: 4px;
  font-weight: 600;
}

/* ===== Header ===== */

header {
  padding: 8px 16px 2px;
  flex-shrink: 0;
}

.score-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.score-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 56px;
}

.score-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
}

.score-value {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.2;
}

.title-area {
  text-align: center;
}

.title-area h1 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 1px;
}

#onchain-stats {
  display: flex;
  gap: 10px;
  justify-content: center;
  font-size: 10px;
  color: var(--text-dim);
  margin-top: 2px;
}

#onchain-stats.hidden {
  display: none;
}

#turn-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 4px 0 2px;
  min-height: 24px;
}

#turn-indicator {
  font-size: 13px;
  font-weight: 600;
  color: var(--gold);
  transition: color 0.2s;
}

#turn-indicator.ai-turn {
  color: var(--text-dim);
}

#timer-display {
  font-size: 12px;
  font-family: 'SF Mono', monospace;
  color: var(--text-dim);
  min-width: 2.5em;
}

#timer-display.hidden { display: none; }
#timer-display.low { color: var(--accent); }

#options-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 14px 16px;
  padding: 6px 0 4px;
}

.option-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

#difficulty-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
}

.diff-label {
  font-size: 11px;
  color: var(--text-dim);
  margin-right: 4px;
}

.diff-btn {
  padding: 4px 10px;
  font-size: 11px;
  border-radius: 12px;
  background: rgba(255,255,255,0.08);
  color: var(--text-dim);
  border: 1px solid rgba(255,255,255,0.1);
}

.diff-btn.active {
  background: var(--accent2);
  color: var(--gold);
  border-color: var(--gold);
}

.diff-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.color-btn {
  padding: 4px 10px;
  font-size: 11px;
  border-radius: 12px;
  background: rgba(255,255,255,0.08);
  color: var(--text-dim);
  border: 1px solid rgba(255,255,255,0.1);
}

.color-btn.active {
  background: var(--accent2);
  color: var(--gold);
  border-color: var(--gold);
}

.icon-btn {
  padding: 4px 8px;
  font-size: 14px;
  border-radius: 8px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.1);
  cursor: pointer;
  line-height: 1;
}

.icon-btn.active {
  background: var(--accent2);
  border-color: var(--gold);
}

.icon-btn.muted {
  opacity: 0.5;
}

.theme-btn {
  padding: 4px 8px;
  font-size: 10px;
  border-radius: 10px;
  background: rgba(255,255,255,0.08);
  color: var(--text-dim);
  border: 1px solid rgba(255,255,255,0.1);
}

.theme-btn.active {
  background: var(--accent2);
  color: var(--gold);
  border-color: var(--gold);
}

/* ===== Themes ===== */
body[data-theme="light"] {
  --bg: #e8e8f0;
  --surface: #fff;
  --text: #1a1a2e;
  --text-dim: #555;
  --board-dark: #b8c4d0;
  --board-light: #d4dce4;
}

body[data-theme="classic"] {
  --bg: #1a3d1a;
  --surface: #2d5a2d;
  --text: #eaeaea;
  --text-dim: #aaccaa;
  --board-dark: #2d5016;
  --board-light: #4a7c23;
}

/* ===== Board ===== */

#board-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  min-height: 0;
}

#board {
  border-radius: 8px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.5);
}

/* ===== Footer Controls ===== */

footer {
  flex-shrink: 0;
  padding: 8px 16px 12px;
  display: flex;
  justify-content: center;
  gap: 10px;
}

button {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 10px 24px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s, opacity 0.15s;
  -webkit-tap-highlight-color: transparent;
}

button:active {
  transform: scale(0.95);
  opacity: 0.85;
}

#stats-btn {
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
}

#leaderboard-btn {
  background: var(--accent2);
  border: 1px solid rgba(255,255,255,0.1);
}

#score-card-btn {
  background: var(--accent2);
  border: 1px solid rgba(255,255,255,0.15);
}

.confetti-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 90;
}

/* ===== Result Overlay ===== */

#result-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  animation: fadeIn 0.25s ease;
}

#result-overlay.hidden { display: none; }

.result-box {
  background: var(--surface);
  border-radius: 16px;
  padding: 28px 24px;
  text-align: center;
  max-width: 320px;
  width: 92%;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  animation: slideUp 0.3s ease;
}

.result-box h2 {
  font-size: 22px;
  margin-bottom: 6px;
}

.result-box p {
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 16px;
}

.result-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.result-actions button {
  width: 100%;
}

#submit-score-btn {
  background: var(--green);
}

#submit-tip-btn {
  background: transparent;
  border: 1px solid var(--green);
  color: var(--green);
}

#share-btn {
  background: var(--accent2);
  border: 1px solid rgba(255,255,255,0.15);
}

.hidden { display: none !important; }

#tx-status {
  font-size: 12px;
  color: var(--gold);
  padding: 6px 0;
  word-break: break-all;
}

#tx-status.success { color: var(--green); }
#tx-status.error { color: var(--accent); }

/* ===== Leaderboard Overlay ===== */

#leaderboard-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.8);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: 200;
  animation: fadeIn 0.2s ease;
}

#leaderboard-overlay.hidden { display: none; }

.leaderboard-box {
  background: var(--surface);
  border-radius: 16px 16px 0 0;
  padding: 20px 16px 28px;
  width: 100%;
  max-width: 500px;
  max-height: 70vh;
  overflow-y: auto;
  animation: slideUp 0.3s ease;
}

.lb-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.lb-header h2 { font-size: 18px; }

#lb-close {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 24px;
  padding: 0 6px;
  cursor: pointer;
}

.lb-loading {
  text-align: center;
  color: var(--text-dim);
  padding: 20px 0;
  font-size: 13px;
}

.lb-empty {
  text-align: center;
  color: var(--text-dim);
  padding: 28px 0;
  font-size: 13px;
}

.lb-row {
  display: flex;
  align-items: center;
  padding: 10px 12px;
  border-radius: 10px;
  margin-bottom: 4px;
  background: rgba(255,255,255,0.03);
}

.lb-row.me {
  background: rgba(233, 69, 96, 0.15);
  border: 1px solid rgba(233, 69, 96, 0.3);
}

.lb-rank {
  width: 28px;
  font-weight: 700;
  font-size: 14px;
  color: var(--text-dim);
  flex-shrink: 0;
}

.lb-rank.gold { color: var(--gold); }
.lb-rank.silver { color: #c0c0c0; }
.lb-rank.bronze { color: #cd7f32; }

.lb-player {
  flex: 1;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 12px;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
}

.lb-score {
  font-weight: 700;
  font-size: 16px;
  color: var(--gold);
  margin-left: 12px;
}

.lb-section-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
  padding: 12px 0 6px;
}

.lb-stat-row {
  display: flex;
  justify-content: space-between;
  padding: 6px 12px;
  font-size: 13px;
}

.lb-stat-label { color: var(--text-dim); }
.lb-stat-value { font-weight: 600; }

/* ===== Animations ===== */

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { transform: translateY(24px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* ===== Tutorial ===== */
#tutorial-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 300;
  animation: fadeIn 0.2s ease;
}

#tutorial-overlay.hidden { display: none; }

.tutorial-box {
  background: var(--surface);
  border-radius: 16px;
  padding: 24px;
  max-width: 320px;
  width: 92%;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}

.tutorial-box h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

.tutorial-box p {
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.5;
  margin-bottom: 18px;
}

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

.tutorial-skip {
  font-size: 12px;
  color: var(--text-dim);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
}

.tutorial-actions div {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}

.tutorial-actions button {
  padding: 8px 20px;
  font-size: 13px;
}

/* ===== Stats Overlay ===== */
#stats-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.8);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: 200;
  animation: fadeIn 0.2s ease;
}

#stats-overlay.hidden { display: none; }

.stats-box {
  max-height: 50vh;
}

.lb-close-style {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 24px;
  padding: 0 6px;
  cursor: pointer;
}

#score-card-canvas.hidden {
  position: absolute;
  left: -9999px;
}