/* ===== RESET & BASE ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #0f0e17;
  --surface: #1a1932;
  --card: #232146;
  --card-hover: #2d2a5e;
  --primary: #ff6e6c;
  --secondary: #67e8f9;
  --accent: #c084fc;
  --success: #4ade80;
  --warning: #fbbf24;
  --danger: #ef4444;
  --text: #f0f0f0;
  --text-dim: #a0a0b8;
  --text-muted: #6b6b80;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 8px 32px rgba(0,0,0,0.3);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.2);
  --transition: 0.2s ease;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

input, button, select { font-family: inherit; }

/* ===== SCREENS ===== */
.screen { display: none; min-height: 100vh; }
.screen.active { display: flex; flex-direction: column; }

/* ===== LANDING ===== */
.landing {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 40px 20px;
  text-align: center;
}
.landing-hero { margin-bottom: 40px; }
.landing-emoji {
  font-size: 5rem;
  display: block;
  margin-bottom: 16px;
  animation: float 3s ease-in-out infinite;
}
.landing h1 {
  font-size: clamp(2.2rem, 7vw, 3.5rem);
  background: linear-gradient(135deg, var(--primary), var(--accent), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}
.landing-tagline {
  font-size: 1.2rem;
  color: var(--text-dim);
  max-width: 400px;
}
.landing-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  max-width: 700px;
  width: 100%;
  margin-bottom: 40px;
}
.feature-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
}
.feature-emoji { font-size: 2.5rem; display: block; margin-bottom: 8px; }
.feature-card h3 { margin-bottom: 6px; font-size: 1.1rem; }
.feature-card p { color: var(--text-dim); font-size: 0.88rem; line-height: 1.4; }

.landing-games-preview {
  margin-bottom: 40px;
  max-width: 600px;
}
.landing-games-preview h2 {
  font-size: 1.3rem;
  margin-bottom: 16px;
  color: var(--text-dim);
}
.game-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}
.chip {
  background: var(--card);
  padding: 10px 18px;
  border-radius: 24px;
  font-size: 0.95rem;
  color: var(--text);
  white-space: nowrap;
}

.landing-cta { margin-top: 10px; }
.btn-lg {
  padding: 18px 48px;
  font-size: 1.2rem;
}
.landing-sub {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 12px;
}

/* ===== AUTH ===== */
.auth-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
}
.auth-hero {
  text-align: center;
  margin-bottom: 40px;
}
.auth-logo {
  font-size: 5rem;
  display: block;
  margin-bottom: 12px;
  animation: float 3s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
.auth-hero h1 {
  font-size: 2.5rem;
  background: linear-gradient(135deg, var(--primary), var(--accent), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.tagline { color: var(--text-dim); font-size: 1.1rem; margin-top: 4px; }
.auth-form {
  background: var(--card);
  border-radius: var(--radius);
  padding: 28px;
  width: 100%;
  max-width: 360px;
  box-shadow: var(--shadow);
}
.auth-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 20px;
  background: var(--bg);
  border-radius: var(--radius-sm);
  padding: 4px;
}
.auth-tab {
  flex: 1;
  padding: 10px;
  border: none;
  background: transparent;
  color: var(--text-dim);
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition);
}
.auth-tab.active {
  background: var(--card);
  color: var(--text);
}
.auth-panel { display: none; flex-direction: column; gap: 12px; }
.auth-panel.active { display: flex; }
.auth-form input {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg);
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 1rem;
  outline: none;
  transition: border-color var(--transition);
}
.auth-form input:focus { border-color: var(--accent); }
.auth-form input::placeholder { color: var(--text-muted); }
.auth-hint { color: var(--text-muted); font-size: 0.8rem; text-align: center; }
.auth-error { color: var(--danger); font-size: 0.9rem; text-align: center; min-height: 1.2em; margin-top: 8px; }

/* ===== HOME ===== */
.home-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: var(--surface);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  position: sticky;
  top: 0;
  z-index: 100;
}
.home-user { display: flex; align-items: center; gap: 10px; }
.avatar-badge {
  font-size: 1.8rem;
  background: var(--card);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}
.user-name { font-weight: 600; font-size: 1.1rem; }
.home-nav { display: flex; gap: 6px; }
.nav-btn {
  background: var(--card);
  border: none;
  color: var(--text);
  width: 40px;
  height: 40px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 1.2rem;
  position: relative;
  transition: background var(--transition);
}
.nav-btn:hover { background: var(--card-hover); }
.badge {
  position: absolute;
  top: 2px;
  right: 2px;
  background: var(--primary);
  color: white;
  font-size: 0.65rem;
  font-weight: 700;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hidden { display: none !important; }

.home-body { flex: 1; padding: 20px; max-width: 1200px; margin: 0 auto; width: 100%; }

.stats-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
}
.stat {
  flex: 1;
  background: var(--card);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: center;
}
.stat-value { font-size: 1.6rem; font-weight: 700; display: block; }
.stat-label { color: var(--text-dim); font-size: 0.8rem; }

.category-filters {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 12px;
  margin-bottom: 16px;
  scrollbar-width: none;
}
.category-filters::-webkit-scrollbar { display: none; }
.cat-btn {
  white-space: nowrap;
  padding: 8px 16px;
  border-radius: 20px;
  border: 2px solid transparent;
  background: var(--card);
  color: var(--text-dim);
  cursor: pointer;
  font-size: 0.9rem;
  transition: var(--transition);
}
.cat-btn:hover { border-color: var(--accent); }
.cat-btn.active { border-color: var(--accent); color: var(--text); background: rgba(192, 132, 252, 0.1); }

/* ===== GAME GRID ===== */
.game-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}
.game-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 24px;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  border: 2px solid transparent;
  position: relative;
}
.game-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--accent); }
.game-card .emoji { font-size: 2.5rem; display: block; margin-bottom: 10px; }
.game-card h3 { font-size: 1.15rem; margin-bottom: 6px; }
.game-card p { color: var(--text-dim); font-size: 0.88rem; line-height: 1.4; }
.game-card .card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.card-stars { color: var(--warning); }
.card-stage { background: rgba(255,255,255,0.06); padding: 3px 10px; border-radius: 12px; }

/* ===== GAME SCREEN ===== */
.game-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: var(--surface);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  flex-wrap: wrap;
  gap: 8px;
}
.game-header h2 { font-size: 1.2rem; }
.game-header-right { display: flex; align-items: center; gap: 10px; }
.btn-back {
  background: var(--card);
  border: none;
  color: var(--text);
  padding: 8px 16px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 0.95rem;
  transition: background var(--transition);
}
.btn-back:hover { background: var(--primary); }
.btn-challenge {
  background: var(--card);
  border: none;
  color: var(--text);
  width: 36px;
  height: 36px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 1.1rem;
  transition: background var(--transition);
}
.btn-challenge:hover { background: var(--accent); }
.score-display { font-size: 1rem; font-weight: 600; color: var(--secondary); }

.stage-picker {
  display: flex;
  gap: 10px;
  justify-content: center;
  padding: 16px 20px;
  flex-wrap: wrap;
}
.stage-btn {
  background: var(--card);
  border: 2px solid transparent;
  color: var(--text);
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  transition: var(--transition);
  text-align: center;
  min-width: 120px;
}
.stage-btn:hover { border-color: var(--accent); }
.stage-btn.active { border-color: var(--success); background: rgba(74, 222, 128, 0.1); }
.stage-btn.locked {
  opacity: 0.4;
  cursor: not-allowed;
  position: relative;
}
.stage-btn.locked::after { content: '🔒'; margin-left: 6px; }
.stage-btn .stage-stars { display: block; font-size: 0.8rem; color: var(--warning); margin-top: 4px; }

.game-area {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px 20px;
  min-height: 300px;
}
.game-footer {
  padding: 12px 20px 20px;
  text-align: center;
}
#progress-bar-container {
  height: 6px;
  background: var(--card);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 10px;
}
#progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 3px;
  width: 0%;
  transition: width 0.3s;
}
.game-message {
  font-size: 1rem;
  color: var(--text-dim);
  min-height: 1.4em;
}

/* ===== BUTTONS ===== */
.btn {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border: none;
  color: white;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s, opacity 0.2s;
  width: 100%;
}
.btn:hover { transform: scale(1.03); }
.btn:active { transform: scale(0.97); }
.btn-secondary { background: var(--card); border: 2px solid var(--accent); }
.btn-success { background: linear-gradient(135deg, #22c55e, #4ade80); }
.btn-sm { padding: 10px 20px; font-size: 0.9rem; width: auto; }
.btn-group { display: flex; gap: 10px; justify-content: center; margin-top: 20px; flex-wrap: wrap; }

/* ===== CHALLENGES ===== */
.screen-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: var(--surface);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.challenges-list, .leaderboard-list {
  padding: 20px;
  max-width: 600px;
  margin: 0 auto;
  width: 100%;
}
.challenge-card, .leaderboard-entry {
  background: var(--card);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.challenge-card .challenge-info { flex: 1; }
.challenge-card .challenge-info strong { display: block; margin-bottom: 4px; }
.challenge-card .challenge-info span { color: var(--text-dim); font-size: 0.85rem; }
.challenge-vs { font-size: 1.5rem; color: var(--accent); }
.send-challenge { padding: 20px; max-width: 600px; margin: 0 auto; width: 100%; }
.send-challenge input {
  width: 100%;
  padding: 12px 16px;
  background: var(--card);
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 1rem;
  outline: none;
  margin-bottom: 12px;
}
.send-challenge input:focus { border-color: var(--accent); }
.search-result {
  background: var(--card);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-bottom: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: background var(--transition);
}
.search-result:hover { background: var(--card-hover); }

/* ===== LEADERBOARD ===== */
.leaderboard-entry {
  justify-content: space-between;
}
.leaderboard-entry .rank { font-weight: 700; font-size: 1.2rem; width: 30px; text-align: center; }
.leaderboard-entry .player-info { flex: 1; display: flex; align-items: center; gap: 8px; }
.leaderboard-entry .lb-score { font-weight: 700; color: var(--secondary); }

#leaderboard-game-select {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 16px 20px;
  scrollbar-width: none;
}
#leaderboard-game-select::-webkit-scrollbar { display: none; }

/* ===== END SCREEN ===== */
.end-screen { text-align: center; padding: 30px 20px; }
.end-screen .big-emoji { font-size: 4rem; display: block; margin-bottom: 12px; }
.end-screen h2 { font-size: 1.8rem; margin-bottom: 8px; }
.end-screen .star-row { font-size: 2rem; margin: 12px 0; }
.end-screen .stat { color: var(--text-dim); font-size: 1rem; margin-bottom: 6px; }
.end-screen .summary { color: var(--text-dim); max-width: 400px; margin: 12px auto; line-height: 1.6; }

/* ===== ANIMATIONS ===== */
@keyframes pop-in {
  0% { transform: scale(0); opacity: 0; }
  70% { transform: scale(1.15); }
  100% { transform: scale(1); opacity: 1; }
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}
@keyframes celebrate {
  0% { transform: scale(1); }
  50% { transform: scale(1.12); }
  100% { transform: scale(1); }
}
.celebrate { animation: celebrate 0.4s ease; }
.shake { animation: shake 0.4s; }
.pop-in { animation: pop-in 0.3s ease-out; }

/* ===== PROFILE ===== */
.profile-content {
  padding: 20px;
  max-width: 700px;
  margin: 0 auto;
  width: 100%;
}
.profile-summary {
  background: var(--card);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 20px;
}
.profile-avatar { font-size: 3.5rem; }
.profile-info h3 { font-size: 1.3rem; margin-bottom: 4px; }
.profile-info p { color: var(--text-dim); font-size: 0.9rem; }
.profile-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}
.profile-stat {
  background: var(--card);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: center;
}
.profile-stat-value { font-size: 1.5rem; font-weight: 700; display: block; }
.profile-stat-label { color: var(--text-dim); font-size: 0.8rem; }
.profile-game-list { display: flex; flex-direction: column; gap: 10px; }
.profile-game-card {
  background: var(--card);
  border-radius: var(--radius-sm);
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.profile-game-card .pg-emoji { font-size: 2rem; }
.profile-game-card .pg-info { flex: 1; }
.profile-game-card .pg-info strong { display: block; font-size: 0.95rem; }
.profile-game-card .pg-info span { color: var(--text-dim); font-size: 0.82rem; }
.profile-game-card .pg-stars { color: var(--warning); font-size: 0.9rem; }
.profile-bar {
  height: 6px;
  background: rgba(255,255,255,0.08);
  border-radius: 3px;
  overflow: hidden;
  margin-top: 6px;
}
.profile-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 3px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 600px) {
  .game-grid { grid-template-columns: 1fr; }
  .stats-bar { flex-direction: row; gap: 8px; }
  .stat { padding: 12px 8px; }
  .stat-value { font-size: 1.3rem; }
  .stat-label { font-size: 0.75rem; }
  .auth-hero h1 { font-size: 2rem; }
  .auth-logo { font-size: 4rem; }
  .landing h1 { font-size: 2.2rem; }
  .landing-features { grid-template-columns: 1fr; }
  .game-header { padding: 10px 14px; }
  .game-header h2 { font-size: 1rem; }
  .home-header { padding: 12px 14px; }
  .home-body { padding: 14px; }
  .game-area { padding: 12px 14px; min-height: 250px; }
  .profile-stats { grid-template-columns: repeat(3, 1fr); gap: 6px; }
  .profile-stat { padding: 10px 6px; }
  .profile-stat-value { font-size: 1.2rem; }
  .btn-lg { padding: 16px 36px; font-size: 1.1rem; }
  .feature-card { padding: 18px 14px; }
  .auth-form { padding: 20px; }
}

@media (max-width: 380px) {
  .stat-value { font-size: 1.1rem; }
  .landing-emoji { font-size: 3.5rem; }
  .auth-logo { font-size: 3rem; }
}