#flaggame {
  --fg-bg: #0d1117;
  --fg-surface: #161b22;
  --fg-surface-hover: #1c2128;
  --fg-border: #21262d;
  --fg-border-light: #30363d;
  --fg-blue: #58a6ff;
  --fg-blue-glow: rgba(88,166,255,0.35);
  --fg-blue-dim: rgba(88,166,255,0.08);
  --fg-cyan: #39d2c0;
  --fg-cyan-glow: rgba(57,210,192,0.35);
  --fg-green: #3fb950;
  --fg-green-glow: rgba(63,185,80,0.3);
  --fg-red: #f85149;
  --fg-red-glow: rgba(248,81,73,0.4);
  --fg-amber: #d29922;
  --fg-purple: #bc8cff;
  --fg-text: #e6edf3;
  --fg-text-sec: #8b949e;
  --fg-text-mut: #484f58;
  --fg-radius: 12px;
  --fg-radius-sm: 8px;
  --fg-radius-lg: 16px;

  background: var(--fg-bg);
  color: var(--fg-text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  max-width: 680px;
  margin: 0 auto;
  padding: 20px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  box-sizing: border-box;
  overflow: hidden;
}
#flaggame *, #flaggame *::before, #flaggame *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ── Screens ── */
#flaggame .screen {
  display: none;
  flex-direction: column;
  align-items: center;
  flex: 1;
  opacity: 0;
  transform: translateY(8px);
}
#flaggame .screen.active {
  display: flex;
  animation: fg-screenIn 0.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
@keyframes fg-screenIn {
  to { opacity: 1; transform: translateY(0); }
}

/* ── Menu Screen ── */
#flaggame .game-title {
  text-align: center;
  margin-top: 12vh;
  margin-bottom: 40px;
}
#flaggame .game-title h1 {
  font-size: 42px;
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.1;
  background: linear-gradient(135deg, var(--fg-text) 0%, var(--fg-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
#flaggame .game-title p {
  color: var(--fg-text-sec);
  font-size: 15px;
  margin-top: 8px;
}

/* Auth */
#flaggame .auth-box {
  background: var(--fg-surface);
  border: 1px solid var(--fg-border);
  border-radius: var(--fg-radius-lg);
  padding: 24px;
  width: 100%;
  max-width: 360px;
  margin-bottom: 20px;
}
#flaggame .auth-box h3 {
  font-size: 14px;
  color: var(--fg-text-sec);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
  font-weight: 600;
}
#flaggame .auth-box input {
  width: 100%;
  padding: 10px 14px;
  background: var(--fg-bg);
  border: 1px solid var(--fg-border);
  border-radius: var(--fg-radius-sm);
  color: var(--fg-text);
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s ease;
  margin-bottom: 10px;
}
#flaggame .auth-box input:focus {
  border-color: var(--fg-blue);
  box-shadow: 0 0 0 3px var(--fg-blue-dim);
}
#flaggame .auth-box input::placeholder { color: var(--fg-text-mut); }
#flaggame .auth-row {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}
#flaggame .logged-in-box {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 0;
}
#flaggame .logged-in-box .username {
  color: var(--fg-cyan);
  font-weight: 600;
}
#flaggame .logged-in-box .btn-logout {
  margin-left: auto;
}

/* Buttons */
#flaggame .btn {
  padding: 10px 20px;
  border-radius: var(--fg-radius-sm);
  border: 1px solid var(--fg-border);
  background: var(--fg-surface);
  color: var(--fg-text);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  user-select: none;
}
#flaggame .btn:hover {
  background: var(--fg-surface-hover);
  border-color: var(--fg-border-light);
}
#flaggame .btn:active {
  transform: scale(0.97);
}
#flaggame .btn-primary {
  background: var(--fg-blue);
  border-color: var(--fg-blue);
  color: #fff;
  font-weight: 600;
}
#flaggame .btn-primary:hover {
  background: #4d9aef;
  border-color: #4d9aef;
}
#flaggame .btn-play {
  width: 100%;
  max-width: 360px;
  padding: 16px 32px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.5px;
  background: linear-gradient(135deg, var(--fg-blue), var(--fg-cyan));
  border: none;
  border-radius: var(--fg-radius);
  color: #fff;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}
#flaggame .btn-play:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--fg-blue-glow);
}
#flaggame .btn-play:active {
  transform: translateY(0) scale(0.98);
}
#flaggame .btn-small {
  padding: 6px 12px;
  font-size: 12px;
}
#flaggame .btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--fg-text-sec);
}
#flaggame .btn-ghost:hover {
  color: var(--fg-text);
  background: var(--fg-surface);
}
#flaggame .msg {
  font-size: 13px;
  margin-top: 8px;
  min-height: 20px;
}
#flaggame .msg.error { color: var(--fg-red); }
#flaggame .msg.success { color: var(--fg-green); }

/* ── Game HUD ── */
#flaggame .game-hud {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  padding-top: 8px;
}
#flaggame .timer-wrap {
  flex: 1;
  height: 6px;
  background: var(--fg-surface);
  border-radius: 3px;
  overflow: hidden;
}
#flaggame .timer-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--fg-cyan), var(--fg-blue));
  border-radius: 3px;
  transition: width 0.3s linear;
  will-change: width;
}
#flaggame .timer-bar.urgent {
  background: linear-gradient(90deg, var(--fg-red), var(--fg-amber));
}
#flaggame .hud-stat {
  text-align: center;
  min-width: 60px;
}
#flaggame .hud-stat .value {
  font-size: 22px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
  transition: color 0.2s ease;
}
#flaggame .hud-stat .label {
  font-size: 11px;
  color: var(--fg-text-mut);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
#flaggame .time-value { color: var(--fg-cyan); }
#flaggame .score-value { color: var(--fg-text); }
#flaggame .streak-value { color: var(--fg-amber); }
#flaggame .streak-hot { color: var(--fg-green) !important; text-shadow: 0 0 12px var(--fg-green-glow); }
#flaggame .streak-fire { color: var(--fg-red) !important; text-shadow: 0 0 16px var(--fg-red-glow); }

/* ── Question ── */
#flaggame .question-area {
  text-align: center;
  margin-bottom: 28px;
}
#flaggame .country-name {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1.2;
  transition: opacity 0.1s ease;
}
#flaggame .question-count {
  font-size: 13px;
  color: var(--fg-text-mut);
  margin-top: 4px;
}

/* ── Flags Grid ── */
#flaggame .flags-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  width: 100%;
  max-width: 560px;
}
#flaggame .flag-card {
  position: relative;
  background: var(--fg-surface);
  border: 2px solid var(--fg-border);
  border-radius: var(--fg-radius);
  padding: 12px;
  cursor: pointer;
  transition: all 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  user-select: none;
  opacity: 0;
  transform: translateY(12px);
}
#flaggame .flag-card.visible {
  opacity: 1;
  transform: translateY(0);
}
#flaggame .flag-card:nth-child(1) { transition-delay: 0ms; }
#flaggame .flag-card:nth-child(2) { transition-delay: 30ms; }
#flaggame .flag-card:nth-child(3) { transition-delay: 60ms; }
#flaggame .flag-card:nth-child(4) { transition-delay: 90ms; }
#flaggame .flag-card:hover {
  border-color: var(--fg-border-light);
  background: var(--fg-surface-hover);
  transform: translateY(-2px);
}
#flaggame .flag-card:active {
  transform: scale(0.97);
}
#flaggame .flag-card .flag-img {
  width: 100%;
  aspect-ratio: 3/2;
  object-fit: contain;
  border-radius: 4px;
  pointer-events: none;
}
#flaggame .flag-card .key-hint {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--fg-bg);
  border: 1px solid var(--fg-border);
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--fg-text-mut);
}

/* Answer feedback */
#flaggame .flag-card.correct {
  border-color: var(--fg-green) !important;
  background: rgba(63,185,80,0.08) !important;
  box-shadow: 0 0 20px var(--fg-green-glow);
}
#flaggame .flag-card.wrong {
  border-color: var(--fg-red) !important;
  background: rgba(248,81,73,0.06) !important;
}
#flaggame .flag-card.disabled {
  pointer-events: none;
  opacity: 0.5;
}

/* Score popup */
#flaggame .score-popup {
  position: fixed;
  pointer-events: none;
  font-size: 20px;
  font-weight: 700;
  color: var(--fg-green);
  opacity: 0;
  z-index: 100;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  animation: fg-scoreUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
@keyframes fg-scoreUp {
  0% { opacity: 1; transform: translateY(0) scale(0.8); }
  100% { opacity: 0; transform: translateY(-40px) scale(1); }
}

/* ── Results Screen ── */
#flaggame .results-header {
  margin-top: 8vh;
  text-align: center;
  margin-bottom: 32px;
}
#flaggame .results-header h2 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 4px;
}
#flaggame .results-header p {
  color: var(--fg-text-sec);
  font-size: 15px;
}
#flaggame .final-score {
  font-size: 64px;
  font-weight: 800;
  letter-spacing: -2px;
  text-align: center;
  margin-bottom: 24px;
  background: linear-gradient(135deg, var(--fg-cyan), var(--fg-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
#flaggame .stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  width: 100%;
  max-width: 400px;
  margin-bottom: 28px;
}
#flaggame .stat-card {
  background: var(--fg-surface);
  border: 1px solid var(--fg-border);
  border-radius: var(--fg-radius-sm);
  padding: 14px;
  text-align: center;
}
#flaggame .stat-card .stat-val {
  font-size: 24px;
  font-weight: 700;
  line-height: 1.2;
}
#flaggame .stat-card .stat-label {
  font-size: 11px;
  color: var(--fg-text-mut);
  text-transform: uppercase;
  letter-spacing: 0.3px;
  margin-top: 2px;
}
#flaggame .results-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 32px;
}

/* ── Leaderboard ── */
#flaggame .leaderboard {
  width: 100%;
  max-width: 400px;
  margin-top: 8px;
}
#flaggame .leaderboard h3 {
  font-size: 14px;
  color: var(--fg-text-sec);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
  font-weight: 600;
  text-align: center;
}
#flaggame .lb-list {
  background: var(--fg-surface);
  border: 1px solid var(--fg-border);
  border-radius: var(--fg-radius);
  overflow: hidden;
}
#flaggame .lb-row {
  display: flex;
  align-items: center;
  padding: 10px 16px;
  gap: 12px;
  font-size: 14px;
  border-bottom: 1px solid var(--fg-border);
}
#flaggame .lb-row:last-child { border-bottom: none; }
#flaggame .lb-rank {
  width: 24px;
  font-weight: 700;
  color: var(--fg-text-mut);
  text-align: center;
}
#flaggame .lb-row:nth-child(1) .lb-rank { color: var(--fg-amber); }
#flaggame .lb-row:nth-child(2) .lb-rank { color: var(--fg-text-sec); }
#flaggame .lb-row:nth-child(3) .lb-rank { color: var(--fg-amber); opacity: 0.7; }
#flaggame .lb-name { flex: 1; font-weight: 500; }
#flaggame .lb-score { font-weight: 700; font-variant-numeric: tabular-nums; color: var(--fg-cyan); }
#flaggame .lb-empty {
  padding: 24px;
  text-align: center;
  color: var(--fg-text-mut);
  font-size: 13px;
}

/* ── Settings Overlay ── */
#flaggame .settings-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s ease;
}
#flaggame .settings-overlay.open {
  opacity: 1;
  pointer-events: auto;
}
#flaggame .settings-panel {
  background: var(--fg-surface);
  border: 1px solid var(--fg-border);
  border-radius: var(--fg-radius-lg);
  padding: 24px;
  width: 320px;
  max-width: 90vw;
  transform: translateY(8px);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}
#flaggame .settings-overlay.open .settings-panel {
  transform: translateY(0);
}
#flaggame .settings-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
#flaggame .settings-header h3 {
  font-size: 16px;
  font-weight: 600;
}
#flaggame .settings-desc {
  font-size: 13px;
  color: var(--fg-text-sec);
  margin-bottom: 16px;
}
#flaggame .key-binds-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
#flaggame .key-bind-row {
  display: flex;
  align-items: center;
  gap: 12px;
}
#flaggame .key-bind-label {
  flex: 1;
  font-size: 14px;
  color: var(--fg-text-sec);
}
#flaggame .key-bind-input {
  width: 48px;
  height: 36px;
  text-align: center;
  font-size: 16px;
  font-weight: 700;
  background: var(--fg-bg);
  border: 1px solid var(--fg-border);
  border-radius: var(--fg-radius-sm);
  color: var(--fg-text);
  cursor: pointer;
  outline: none;
  transition: border-color 0.15s ease;
}
#flaggame .key-bind-input:focus {
  border-color: var(--fg-blue);
  box-shadow: 0 0 0 3px var(--fg-blue-dim);
}

/* ── Responsive ── */
@media (max-width: 500px) {
  #flaggame { padding: 12px; }
  #flaggame .game-title h1 { font-size: 32px; }
  #flaggame .game-title { margin-top: 6vh; margin-bottom: 28px; }
  #flaggame .country-name { font-size: 24px; }
  #flaggame .flags-grid { gap: 8px; }
  #flaggame .flag-card { padding: 8px; border-radius: var(--fg-radius-sm); }
  #flaggame .flag-card .key-hint { width: 20px; height: 20px; font-size: 11px; top: 6px; right: 6px; }
  #flaggame .final-score { font-size: 48px; }
  #flaggame .game-hud { gap: 10px; }
  #flaggame .hud-stat .value { font-size: 18px; }
  #flaggame .stats-grid { gap: 8px; }
  #flaggame .results-header { margin-top: 4vh; }
}