:root {
  /* Supabaze Design Tokens */
  --canvas: #ffffff;
  --canvas-night: #1c1c1c;
  --ink: #171717;
  --ink-mute: #707070;
  --primary: #3ecf8e;
  --primary-deep: #24b47e;
  --hairline: #dfdfdf;
  --hairline-strong: #c7c7c7;
  --success: #24b47e;
  --danger: #ef4444;
  --radius-sm: 6px;
  --radius-lg: 12px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Inter', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  background-color: var(--canvas);
  color: var(--ink);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  -webkit-font-smoothing: antialiased;
}

.app {
  width: min(720px, 100%);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.hero {
  text-align: center;
}

.hero h1 {
  margin: 0 0 8px;
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 500;
  letter-spacing: -1.44px;
  color: var(--ink);
}

.subtitle {
  margin: 0;
  color: var(--ink-mute);
  font-size: 16px;
  line-height: 1.5;
}

.panel {
  background: var(--canvas);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.status-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 16px;
}

.stat {
  background: #fafafa;
  padding: 16px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--hairline);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-mute);
  font-weight: 500;
}

.stat strong {
  font-size: 28px;
}

.unit {
  font-size: 14px;
  color: var(--ink-mute);
  margin-left: 4px;
}

.rpg-status-bar {
  background: #2d2d2d;
  padding: 16px;
  border-radius: var(--radius-lg);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.player-stats {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
}

.level-badge {
  background: var(--primary);
  color: #000;
  font-weight: 800;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 18px;
  min-width: 60px;
  text-align: center;
}

.xp-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.xp-label {
  font-size: 12px;
  opacity: 0.8;
}

.xp-bar-bg, .hp-bar-bg {
  height: 12px;
  background: rgba(255,255,255,0.1);
  border-radius: 6px;
  overflow: hidden;
}

.xp-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #facc15, #eab308);
  transition: width 0.3s ease;
}

.game-area {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.monster-zone {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px;
  background: #fafafa;
  border-radius: var(--radius-lg);
  border: 1px solid var(--hairline);
}

.monster-sprite {
  font-size: 64px;
  animation: float 2s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.monster-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.monster-name {
  font-weight: 700;
  font-size: 18px;
  color: var(--ink);
}

.hp-bar-bg {
  background: #e5e7eb;
  height: 16px;
}

.hp-bar-fill {
  height: 100%;
  width: 100%;
  background: var(--danger);
  transition: width 0.2s ease;
}

.hp-text {
  font-size: 12px;
  color: var(--ink-mute);
  text-align: right;
}

.word-display {
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 500;
  letter-spacing: -0.72px;
  text-align: center;
  padding: 24px;
  border-radius: var(--radius-lg);
  background: var(--canvas-night);
  color: #ffffff;
  min-height: 96px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s ease;
}

.word-input {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--hairline-strong);
  background: var(--canvas);
  color: var(--ink);
  font-size: 18px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.word-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(62, 207, 142, 0.2);
}

.word-input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.feedback {
  min-height: 20px;
  font-size: 14px;
  text-align: center;
  color: var(--ink-mute);
}

.feedback.success {
  color: var(--success);
}

.feedback.error {
  color: var(--danger);
}

.user-setup {
  margin-bottom: 8px;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
}

.control-label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--ink-mute);
  font-weight: 500;
}

select {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--hairline-strong);
  background: var(--canvas);
  color: var(--ink);
  font-size: 15px;
  outline: none;
  cursor: pointer;
}

.primary-btn {
  flex: 1;
  min-width: 160px;
  padding: 12px 20px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--primary);
  color: var(--ink);
  font-weight: 500;
  font-size: 15px;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.1s ease;
}

.primary-btn:hover {
  background: #35bd80;
}

.primary-btn:active {
  background: var(--primary-deep);
  transform: translateY(1px);
}

.leaderboard-panel {
  gap: 16px;
}

.leaderboard-header h2 {
  margin: 0;
  font-size: 20px;
}

.leaderboard-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.leaderboard-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: #fafafa;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md, 8px);
  font-size: 14px;
}

.leaderboard-item .rank {
  font-weight: 600;
  color: var(--ink);
  width: 24px;
}

.leaderboard-item .meta {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.leaderboard-item .date {
  font-size: 11px;
  color: var(--ink-mute);
}

.leaderboard-item .record {
  font-weight: 700;
  color: var(--success);
}

.difficulty-tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--hairline-strong);
  font-size: 12px;
  font-weight: 600;
  color: var(--ink);
  background: #fff;
  margin-right: 8px;
}

.difficulty-very-easy {
  border-color: #bae6fd;
  background: #f0f9ff;
}

.difficulty-easy {
  border-color: #a3e4d7;
  background: #ecfdf5;
}

.difficulty-intermediate {
  border-color: #fcd34d;
  background: #fffbeb;
}

.difficulty-hard {
  border-color: #fca5a5;
  background: #fef2f2;
}

.difficulty-the-hardest {
  border-color: #c084fc;
  background: #faf5ff;
}

.empty-record {
  text-align: center;
  padding: 24px;
  color: var(--ink-mute);
  font-size: 14px;
}

@media (max-width: 520px) {
  .panel {
    padding: 20px;
  }

  .controls {
    flex-direction: column;
    align-items: stretch;
  }

  .primary-btn {
    width: 100%;
  }
}