/* ═══════════════════════ RESET & BASE ═══════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
.hidden { display: none !important; }

:root {
  --bg: #0a0a10;
  --bg-panel: rgba(255,255,255,0.04);
  --bg-panel-hover: rgba(255,255,255,0.08);
  --cyan: #00e5ff;
  --magenta: #ff00ff;
  --yellow: #ffea00;
  --green: #00ff88;
  --red: #ff3d5a;
  --text: #e0e0e8;
  --text-dim: #888899;
  --border: rgba(255,255,255,0.08);
  --radius: 8px;
}

html, body {
  width: 100%; height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, 'SF Pro Display', 'Segoe UI', system-ui, sans-serif;
  overflow: hidden;
}
html { overflow-y: hidden; }

/* ═══════════════════════ SCREENS ═══════════════════════ */
.screen {
  display: none;
  position: absolute;
  inset: 0;
  flex-direction: column;
}
.screen.active { display: flex; }

/* ═══════════════════════ TOP BAR ═══════════════════════ */
.top-bar {
  display: flex;
  align-items: center;
  padding: 12px 24px;
  border-bottom: 1px solid var(--border);
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(12px);
  z-index: 10;
  gap: 16px;
}
.logo {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
}
.accent { color: var(--cyan); }

/* ═══════════════════════ BUTTONS ═══════════════════════ */
button {
  cursor: pointer;
  border: none;
  font-family: inherit;
  font-weight: 600;
  transition: all 0.15s;
}
.btn-primary {
  background: var(--cyan);
  color: #000;
  padding: 12px 32px;
  border-radius: var(--radius);
  font-size: 16px;
}
.btn-primary:hover { filter: brightness(1.2); transform: scale(1.02); }
.btn-primary:disabled { opacity: 0.3; cursor: not-allowed; transform: none; }
.btn-secondary {
  background: var(--bg-panel);
  color: var(--text);
  padding: 12px 32px;
  border-radius: var(--radius);
  font-size: 16px;
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--bg-panel-hover); }
.btn-back {
  background: transparent;
  color: var(--text-dim);
  padding: 8px 12px;
  border-radius: var(--radius);
  font-size: 14px;
}
.btn-back:hover { color: var(--text); }
.btn-glow {
  box-shadow: 0 0 20px rgba(0,229,255,0.3), 0 0 60px rgba(0,229,255,0.1);
  animation: glow-pulse 2s ease-in-out infinite;
}
@keyframes glow-pulse {
  0%, 100% { box-shadow: 0 0 20px rgba(0,229,255,0.3), 0 0 60px rgba(0,229,255,0.1); }
  50% { box-shadow: 0 0 30px rgba(0,229,255,0.5), 0 0 80px rgba(0,229,255,0.2); }
}

/* ═══════════════════════ BOTTOM BAR ═══════════════════════ */
.bottom-bar {
  display: flex;
  justify-content: center;
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(12px);
}

/* ═══════════════════════ LIBRARY SCREEN ═══════════════════════ */
.library-content {
  flex: 1;
  display: flex;
  overflow: hidden;
  gap: 1px;
  background: var(--border);
}
.search-section, .songs-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 20px;
  background: var(--bg);
  overflow-y: auto;
}
.search-section h2, .songs-section h2 {
  font-size: 16px;
  color: var(--text-dim);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.search-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}
.search-bar input {
  flex: 1;
  background: var(--bg-panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 16px;
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s;
}
.search-bar input:focus { border-color: var(--cyan); }
.search-bar button {
  background: var(--cyan);
  color: #000;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
}
.search-bar button:hover { filter: brightness(1.2); }

/* Search results */
.search-results { display: flex; flex-direction: column; gap: 6px; }
.search-heading { color: var(--accent); font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; margin: 0 0 4px 2px; }
.search-result-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  background: var(--bg-panel);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.15s;
}
.search-result-item:hover { background: var(--bg-panel-hover); }
.search-result-item img {
  width: 64px;
  height: 48px;
  object-fit: cover;
  border-radius: 4px;
  flex-shrink: 0;
  background: #222;
}
.search-result-info { flex: 1; min-width: 0; }
.search-result-title {
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.search-result-meta {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 2px;
}
.search-result-item .btn-dl,
.search-result-item .btn-play-stream {
  background: var(--green);
  color: #000;
  padding: 6px 14px;
  border-radius: var(--radius);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
  flex-shrink: 0;
}
.search-result-item .btn-dl:hover,
.search-result-item .btn-play-stream:hover { filter: brightness(1.2); }
.search-result-item .btn-dl:disabled,
.search-result-item .btn-play-stream:disabled { opacity: 0.4; cursor: not-allowed; }

/* Song list */
.songs-list { display: flex; flex-direction: column; gap: 6px; }
.song-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--bg-panel);
  border-radius: var(--radius);
  transition: background 0.15s;
}
.song-item:hover { background: var(--bg-panel-hover); }
.song-item.selected { border: 1px solid var(--cyan); background: rgba(0,229,255,0.06); }
.song-icon {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--cyan), var(--magenta));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}
img.song-icon.song-art {
  object-fit: cover;
  border-radius: 6px;
}
.song-info { flex: 1; min-width: 0; }
.song-title {
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.song-size { font-size: 12px; color: var(--text-dim); }
.song-item .btn-delete {
  background: transparent;
  color: var(--red);
  padding: 6px 10px;
  border-radius: var(--radius);
  font-size: 12px;
  opacity: 0;
  transition: opacity 0.15s;
}
.song-item:hover .btn-delete { opacity: 1; }
.empty-msg { color: var(--text-dim); font-size: 14px; text-align: center; padding: 40px 20px; }

/* ═══════════════════════ SETUP SCREEN ═══════════════════════ */
.setup-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  gap: 32px;
  overflow-y: auto;
}

/* Song selection cards */
.song-select-cards {
  width: 100%;
  max-width: 500px;
  text-align: center;
}
.song-select-cards h2 {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
  margin-bottom: 12px;
}
.song-card-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 240px;
  overflow-y: auto;
}
.song-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-panel);
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  text-align: left;
}
.song-card:hover { background: var(--bg-panel-hover); }
.song-card.selected {
  border-color: var(--cyan);
  background: rgba(0,229,255,0.08);
}
.song-card-icon {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--cyan), var(--magenta));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}
img.song-card-icon.song-art {
  object-fit: cover;
}
.song-card.selected .song-card-icon {
  box-shadow: 0 0 12px rgba(0,229,255,0.4);
}
.song-card-info { flex: 1; min-width: 0; }
.song-card-title {
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.song-card-meta {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 2px;
}
.ctrl-color { font-size: 16px; }
.vs-divider {
  font-size: 28px;
  font-weight: 900;
  color: var(--text-dim);
  letter-spacing: 4px;
}

/* Difficulty */
.difficulty-select { text-align: center; }
.difficulty-select h2 {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
  margin-bottom: 12px;
}
.diff-buttons { display: flex; gap: 8px; }
.diff-btn {
  padding: 10px 28px;
  border-radius: var(--radius);
  background: var(--bg-panel);
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  border: 1px solid var(--border);
  transition: all 0.15s;
}
.diff-btn:hover { background: var(--bg-panel-hover); }
.diff-btn.active {
  background: var(--cyan);
  color: #000;
  border-color: var(--cyan);
}

/* Controls reference */
.controls-reference {
  background: var(--bg-panel);
  border-radius: var(--radius);
  padding: 16px 24px;
  border: 1px solid var(--border);
}
.controls-reference h3 {
  text-align: center;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
  margin-bottom: 12px;
}
.controls-grid {
  display: flex;
  gap: 40px;
  justify-content: center;
}
.ctrl-col {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
  align-items: center;
}
.ctrl-col strong { color: var(--cyan); margin-bottom: 4px; }
kbd {
  display: inline-block;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 8px;
  font-family: monospace;
  font-size: 12px;
  min-width: 24px;
  text-align: center;
}

/* ═══════════════════════ GAME SCREEN ═══════════════════════ */
#screen-game {
  background: #000;
  position: relative;
}
#game-canvas {
  width: 100%;
  height: 100%;
  display: block;
}
#game-hud {
  position: absolute;
  top: 0; left: 0; right: 0;
  display: flex;
  align-items: center;
  padding: 8px 20px;
  z-index: 5;
  pointer-events: none;
}
.hud-left, .hud-right { flex: 1; }
.hud-right { text-align: right; }
.hud-center { flex: 1; display: flex; justify-content: center; }
.hud-score, .hud-combo, .hud-multi {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-shadow: 0 1px 8px rgba(0,0,0,0.7);
  color: var(--text);
}
.hud-score span, .hud-combo span, .hud-multi span {
  font-family: 'SF Mono', 'Menlo', 'Consolas', monospace;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 1px;
}
#hud-score-val { color: var(--cyan); text-shadow: 0 0 12px rgba(0,229,255,0.4); }
#hud-combo-val { color: var(--yellow); text-shadow: 0 0 12px rgba(255,234,0,0.4); }
#hud-multi-val { color: var(--magenta); text-shadow: 0 0 12px rgba(255,0,255,0.4); }

/* Crowd meter */
.crowd-meter-container { width: 200px; }
.crowd-meter-label {
  text-align: center;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--text-dim);
  margin-bottom: 4px;
}
.crowd-meter-bar {
  height: 10px;
  background: rgba(255,255,255,0.1);
  border-radius: 5px;
  overflow: hidden;
}
.crowd-meter-fill {
  height: 100%;
  width: 50%;
  background: linear-gradient(90deg, var(--red), var(--yellow), var(--green));
  border-radius: 5px;
  transition: width 0.3s;
}

/* Game overlay */
.game-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 20;
}
.game-overlay.hidden { display: none; }
.overlay-content { text-align: center; }
.countdown-song-info {
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  animation: fadeIn 0.5s ease;
}
.countdown-song-img {
  width: 240px;
  height: 135px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 0 30px rgba(0,229,255,0.3);
}
.countdown-song-img-placeholder {
  width: 240px;
  height: 135px;
  background: var(--surface);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  color: var(--text-dim);
}
.countdown-song-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  max-width: 400px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
@keyframes fadeIn {
  0% { opacity: 0; transform: translateY(-10px); }
  100% { opacity: 1; transform: translateY(0); }
}
.countdown-text {
  font-size: 120px;
  font-weight: 900;
  color: var(--cyan);
  text-shadow: 0 0 40px rgba(0,229,255,0.6);
  animation: pop 0.4s ease-out;
}
@keyframes pop {
  0% { transform: scale(2); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}
.loading-text {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  font-size: 18px;
  color: var(--text-dim);
}
.loading-text.hidden { display: none; }
.spinner {
  width: 40px; height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--cyan);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}
.pause-menu {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}
.pause-menu.hidden { display: none; }
.pause-menu h2 { font-size: 48px; font-weight: 900; }

/* ═══════════════════════ RESULTS SCREEN ═══════════════════════ */
#screen-results {
  align-items: center;
  justify-content: center;
  background: radial-gradient(ellipse at center, rgba(0,229,255,0.05) 0%, var(--bg) 70%);
}
.results-content {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}
.results-title {
  font-size: 36px;
  font-weight: 900;
}
.results-grade {
  font-size: 100px;
  font-weight: 900;
  width: 160px; height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 4px solid var(--cyan);
  color: var(--cyan);
  text-shadow: 0 0 30px rgba(0,229,255,0.5);
}
.results-score {
  font-size: 28px;
  font-weight: 700;
}
#results-score { color: var(--cyan); }
.results-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  min-width: 360px;
}
.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px;
  background: var(--bg-panel);
  border-radius: var(--radius);
}
.stat-label { font-size: 12px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 1px; }
.stat-value { font-size: 22px; font-weight: 700; color: var(--cyan); }
.results-buttons { display: flex; gap: 12px; margin-top: 8px; }

/* Results comparison badges */
.results-comparison {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}
.results-badge {
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.5px;
}
.badge-pb {
  background: rgba(255,234,0,0.15);
  color: var(--yellow);
  border: 1px solid rgba(255,234,0,0.3);
}
.badge-rank {
  background: rgba(0,229,255,0.1);
  color: var(--cyan);
  border: 1px solid rgba(0,229,255,0.25);
}
.badge-improvement {
  background: rgba(0,255,136,0.1);
  color: var(--green);
  border: 1px solid rgba(0,255,136,0.25);
}

/* ═══════════════════════ LEADERBOARD SCREEN ═══════════════════════ */
#screen-leaderboard {
  background: var(--bg);
}
.leaderboard-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 20px;
}
.lb-search-bar {
  margin-bottom: 16px;
}
.lb-search-bar input {
  width: 100%;
  background: var(--bg-panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 16px;
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s;
}
.lb-search-bar input:focus { border-color: var(--cyan); }

.lb-song-list {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.lb-song-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  background: var(--bg-panel);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.15s;
}
.lb-song-item:hover { background: var(--bg-panel-hover); }
.lb-rank {
  font-size: 20px;
  font-weight: 900;
  color: var(--text-dim);
  min-width: 36px;
  text-align: center;
}
.lb-rank:nth-child(1) { color: var(--yellow); }
.lb-song-item:nth-child(1) .lb-rank { color: var(--yellow); }
.lb-song-item:nth-child(2) .lb-rank { color: #ccc; }
.lb-song-item:nth-child(3) .lb-rank { color: #cd7f32; }
.lb-song-info { flex: 1; min-width: 0; }
.lb-song-title {
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.lb-song-plays {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 2px;
}
.lb-song-stats {
  text-align: right;
  flex-shrink: 0;
}
.lb-song-top-score {
  font-size: 16px;
  font-weight: 700;
  color: var(--cyan);
}
.lb-song-top-grade {
  font-size: 12px;
  color: var(--text-dim);
}
.lb-song-actions {
  flex-shrink: 0;
  display: flex;
  gap: 6px;
  align-items: center;
}
.lb-play-btn {
  background: var(--cyan);
  color: #000;
  padding: 6px 12px;
  border-radius: var(--radius);
  font-size: 11px;
  font-weight: 700;
  white-space: nowrap;
}
.lb-play-btn:hover { filter: brightness(1.2); }
.lb-dl-btn {
  background: var(--green);
  color: #000;
  padding: 6px 12px;
  border-radius: var(--radius);
  font-size: 11px;
  font-weight: 700;
  white-space: nowrap;
}
.lb-dl-btn:hover { filter: brightness(1.2); }
.lb-dl-btn.downloaded {
  background: var(--bg-panel);
  color: var(--text-dim);
  border: 1px solid var(--border);
  cursor: default;
}

/* Leaderboard detail */
.lb-detail {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.lb-detail.hidden { display: none; }
.lb-back-btn { margin-bottom: 4px; }
.lb-detail-title {
  font-size: 22px;
  font-weight: 800;
  color: var(--text);
}
.lb-detail-meta {
  font-size: 13px;
  color: var(--text-dim);
}
.lb-detail-scores {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.lb-score-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  background: var(--bg-panel);
  border-radius: var(--radius);
}
.lb-score-rank {
  font-size: 18px;
  font-weight: 900;
  color: var(--text-dim);
  min-width: 32px;
  text-align: center;
}
.lb-score-row:nth-child(1) .lb-score-rank { color: var(--yellow); }
.lb-score-row:nth-child(2) .lb-score-rank { color: #ccc; }
.lb-score-row:nth-child(3) .lb-score-rank { color: #cd7f32; }
.lb-score-info { flex: 1; }
.lb-score-value {
  font-size: 18px;
  font-weight: 700;
  color: var(--cyan);
}
.lb-score-details {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 2px;
}
.lb-score-grade {
  font-size: 28px;
  font-weight: 900;
  min-width: 40px;
  text-align: center;
}
.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
}

.lb-empty-msg {
  color: var(--text-dim);
  font-size: 14px;
  text-align: center;
  padding: 40px 20px;
}

/* ═══════════════════════ TOAST NOTIFICATIONS ═══════════════════════ */
#toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 1000;
}
.toast {
  padding: 12px 20px;
  background: rgba(20,20,30,0.95);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  backdrop-filter: blur(12px);
  animation: toast-in 0.3s ease-out;
  max-width: 340px;
}
.toast.success { border-left: 3px solid var(--green); }
.toast.error { border-left: 3px solid var(--red); }
.toast.info { border-left: 3px solid var(--cyan); }
@keyframes toast-in {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}

/* ═══════════════════════ SCROLLBAR ═══════════════════════ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.15); }

/* ═══════════════════════ AUTH SCREEN ═══════════════════════ */
.auth-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: 24px;
}
.auth-logo { font-size: 48px; margin-bottom: 32px; }
.auth-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.auth-tab {
  padding: 10px 32px;
  font-size: 14px;
  background: transparent;
  color: var(--text-dim);
  border: none;
}
.auth-tab.active {
  background: var(--cyan);
  color: #000;
  font-weight: 700;
}
.auth-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
  max-width: 340px;
}
.auth-form.hidden { display: none; }
.auth-form input {
  padding: 12px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-panel);
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s;
}
.auth-form input:focus { border-color: var(--cyan); }
.btn-link {
  background: transparent;
  color: var(--text-dim);
  font-size: 13px;
  text-decoration: underline;
  padding: 4px 0;
}
.btn-link:hover { color: var(--cyan); }
.auth-hint {
  font-size: 13px;
  color: var(--text-dim);
  text-align: center;
}
.recover-result {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  font-size: 14px;
  text-align: center;
}
.recover-result.hidden { display: none; }
.auth-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  max-width: 340px;
  margin: 20px 0;
  color: var(--text-dim);
  font-size: 13px;
}
.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}
.btn-guest {
  width: 100%;
  max-width: 340px;
}
.auth-note {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 8px;
}
.auth-error {
  background: rgba(255,61,90,0.15);
  border: 1px solid var(--red);
  border-radius: var(--radius);
  padding: 10px 16px;
  font-size: 13px;
  color: var(--red);
  max-width: 340px;
  width: 100%;
  margin-top: 12px;
  text-align: center;
}
.auth-error.hidden { display: none; }

/* user badge in top bar */
.top-bar-right {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}
.user-badge {
  font-size: 13px;
  color: var(--cyan);
  font-weight: 600;
}

/* leaderboard detail: score expansion */
.lb-score-row { cursor: pointer; }
.lb-score-row:hover { background: var(--bg-panel-hover); }
.lb-score-detail {
  display: none;
  padding: 8px 12px 12px 56px;
  font-size: 13px;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border);
}
.lb-score-detail.open { display: block; }
.lb-score-detail .detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 6px 16px;
  margin-top: 4px;
}
.lb-score-detail .detail-grid span { color: var(--text); }
.lb-score-username {
  font-size: 12px;
  color: var(--cyan);
  font-weight: 600;
}

/* library & search buttons */
.btn-play-lib, .btn-save-lib {
  background: transparent;
  color: var(--cyan);
  border: 1px solid var(--cyan);
  border-radius: 50%;
  width: 32px;
  height: 32px;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.15s;
}
.btn-play-lib:hover { background: var(--cyan); color: #000; }
.btn-save-lib { color: var(--green); border-color: var(--green); font-size: 20px; }
.btn-save-lib:hover { background: var(--green); color: #000; }
.btn-save-lib:disabled { opacity: 0.5; cursor: default; }
.btn-delete {
  background: transparent;
  color: var(--text-dim);
  border: none;
  font-size: 16px;
  padding: 4px 8px;
  flex-shrink: 0;
}
.btn-delete:hover { color: var(--red); }
.lb-top3 { font-size: 11px; color: var(--text-dim); margin-top: 2px; }
.lb-top3-entry { margin-right: 8px; }

/* ═══════════════════════ PROFILE ═══════════════════════ */
.profile-content { padding: 16px 24px; max-width: 700px; margin: 0 auto; overflow-y: auto; flex: 1; }
.profile-header { display: flex; align-items: center; gap: 20px; margin-bottom: 24px; padding: 20px; background: var(--surface); border-radius: 12px; border: 1px solid var(--border); }
.profile-avatar { font-size: 48px; width: 72px; height: 72px; display: flex; align-items: center; justify-content: center; background: var(--bg); border-radius: 50%; border: 2px solid var(--border); }
.profile-username { font-size: 24px; margin: 0 0 6px; }
.profile-badges { display: flex; gap: 8px; margin-bottom: 8px; }
.profile-mmr-badge { background: linear-gradient(135deg, #ffd70044, #ff8c0044); color: #ffd700; padding: 3px 10px; border-radius: 12px; font-size: 12px; font-weight: 600; }
.profile-online-badge { padding: 3px 10px; border-radius: 12px; font-size: 12px; }
.profile-online-badge.online { background: #00ff8833; color: var(--green); }
.profile-online-badge.offline { background: var(--surface); color: var(--text-dim); }
.profile-actions { display: flex; gap: 8px; }
.profile-actions .btn-sm { font-size: 12px; }
.profile-section-title { margin: 16px 0 8px; color: var(--text-dim); font-size: 14px; text-transform: uppercase; letter-spacing: 1px; }
.profile-scores { display: flex; flex-direction: column; gap: 6px; }
.profile-score-item { display: flex; align-items: center; gap: 12px; padding: 10px 14px; background: var(--surface); border-radius: 8px; border: 1px solid var(--border); cursor: default; }
.profile-score-info { flex: 1; min-width: 0; }
.profile-score-title { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.profile-score-meta { font-size: 12px; color: var(--text-dim); }
.profile-score-value { font-size: 18px; font-weight: 700; color: var(--cyan); min-width: 80px; text-align: right; }
.profile-score-grade { font-size: 22px; font-weight: 900; min-width: 30px; text-align: center; }

/* ═══════════════════════ FRIENDS ═══════════════════════ */
.friends-content { padding: 16px 24px; max-width: 600px; margin: 0 auto; overflow-y: auto; flex: 1; }
.friends-add-section { margin-bottom: 20px; }
.friend-add-result { margin-top: 8px; font-size: 13px; }
.friend-requests { margin-bottom: 16px; }
.friend-request-item { display: flex; align-items: center; justify-content: space-between; padding: 10px 14px; background: var(--surface); border: 1px solid var(--border); border-radius: 8px; margin-bottom: 6px; }
.friend-request-item .fr-name { font-weight: 600; }
.friend-request-item .fr-actions { display: flex; gap: 6px; }
.friends-list { display: flex; flex-direction: column; gap: 6px; }
.friend-item { display: flex; align-items: center; gap: 12px; padding: 10px 14px; background: var(--surface); border: 1px solid var(--border); border-radius: 8px; }
.friend-item .friend-name { flex: 1; font-weight: 600; }
.friend-item .friend-status { font-size: 11px; padding: 2px 8px; border-radius: 10px; }
.friend-item .friend-status.online { background: #00ff8833; color: var(--green); }
.friend-item .friend-status.offline { background: var(--surface); color: var(--text-dim); }
.friend-item .friend-actions { display: flex; gap: 6px; }

/* ═══════════════════════ COMPETITIVE ═══════════════════════ */
.competitive-content { padding: 16px 24px; max-width: 700px; margin: 0 auto; overflow-y: auto; flex: 1; -webkit-overflow-scrolling: touch; }
.comp-section { text-align: center; }
.comp-mmr-display { font-size: 18px; margin-bottom: 20px; color: var(--text-dim); }
.comp-mmr-display span { color: #ffd700; font-weight: 700; font-size: 22px; }
.comp-big-btn { font-size: 18px; padding: 16px 40px; }
.comp-queue-status { margin-top: 16px; }
.comp-queue-status p { margin: 8px 0; color: var(--text-dim); }
.comp-rankings { margin-top: 12px; text-align: left; }
.comp-rank-item { display: flex; align-items: center; gap: 12px; padding: 8px 14px; background: var(--surface); border: 1px solid var(--border); border-radius: 8px; margin-bottom: 4px; cursor: pointer; }
.comp-rank-item:hover { border-color: var(--cyan); }
.comp-rank-pos { font-weight: 700; color: var(--text-dim); min-width: 28px; }
.comp-rank-name { flex: 1; font-weight: 600; }
.comp-rank-mmr { color: #ffd700; font-weight: 600; }
.comp-opponent-label { font-size: 16px; color: var(--text-dim); margin-bottom: 12px; }
.comp-opponent-label span { color: var(--cyan); font-weight: 700; }
.comp-song-results { margin-top: 10px; max-height: 50vh; overflow-y: auto; text-align: left; }
.comp-chosen-song { font-size: 18px; font-weight: 600; margin: 12px 0; color: var(--cyan); }
.comp-results-title { font-size: 28px; margin-bottom: 16px; }
.comp-results-title.win { color: var(--green); }
.comp-results-title.lose { color: var(--red); }
.comp-results-title.draw { color: var(--yellow); }
.comp-results-grid { display: flex; gap: 20px; justify-content: center; align-items: flex-start; margin-bottom: 20px; }
.comp-result-col { flex: 1; max-width: 240px; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 16px; text-align: center; }
.comp-result-col.winner { border-color: var(--green); box-shadow: 0 0 12px #00ff8833; }
.comp-result-vs { font-size: 24px; font-weight: 900; color: var(--text-dim); align-self: center; }
.comp-player-name { font-size: 16px; margin: 0 0 8px; }
.comp-player-score { font-size: 28px; font-weight: 900; color: var(--cyan); }
.comp-player-grade { font-size: 36px; font-weight: 900; margin: 4px 0; }
.comp-player-stats { font-size: 12px; color: var(--text-dim); line-height: 1.6; }
.comp-mmr-change { font-size: 16px; margin-bottom: 16px; }
.comp-mmr-change .mmr-gain { color: var(--green); font-weight: 700; }
.comp-mmr-change .mmr-loss { color: var(--red); font-weight: 700; }
.comp-opponent-live { margin-top: 12px; font-size: 14px; color: var(--text-dim); }
.comp-opponent-live span { color: var(--cyan); font-weight: 600; }
.lb-username-link:hover { color: var(--cyan); text-decoration: underline; }

/* ═══════════════════════ PRE-GAME SONG INTRO ═══════════════════════ */
.song-intro-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.92);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 1;
  transition: opacity 0.5s;
}
.song-intro-overlay.fade-out { opacity: 0; }
.song-intro-art {
  width: 200px;
  height: 200px;
  border-radius: 12px;
  object-fit: cover;
  border: 2px solid var(--cyan);
  box-shadow: 0 0 40px rgba(0,229,255,0.3);
  margin-bottom: 24px;
}
.song-intro-art-placeholder {
  width: 200px;
  height: 200px;
  border-radius: 12px;
  background: var(--surface);
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 64px;
  margin-bottom: 24px;
}
.song-intro-title {
  font-size: 28px;
  font-weight: 800;
  text-align: center;
  max-width: 500px;
  margin-bottom: 8px;
}
.song-intro-vs {
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: 24px;
}
.song-intro-vs span { color: var(--cyan); font-weight: 700; }
.song-intro-countdown {
  font-size: 72px;
  font-weight: 900;
  color: var(--cyan);
  text-shadow: 0 0 30px rgba(0,229,255,0.5);
}

/* ═══════════════════════ COMP SONG TIMER ═══════════════════════ */
.comp-song-timer {
  font-size: 18px;
  font-weight: 700;
  color: var(--cyan);
  margin-left: 8px;
}
.comp-song-timer.urgent {
  color: var(--red);
  animation: timerPulse 0.5s ease-in-out infinite;
}
@keyframes timerPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ═══════════════════════ SLOT MACHINE ═══════════════════════ */
.slot-machine-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 250;
  opacity: 1;
  transition: opacity 0.6s;
}
.slot-machine-overlay.fade-out { opacity: 0; }
.slot-machine-container {
  text-align: center;
}
.slot-machine-title {
  font-size: 22px;
  font-weight: 700;
  color: rgba(255,255,255,0.8);
  margin-bottom: 20px;
  letter-spacing: 1px;
}
.slot-machine-window {
  width: 300px;
  height: 240px;
  border: 2px solid rgba(0,229,255,0.3);
  border-radius: 16px;
  overflow: hidden;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.03);
  box-shadow: 0 0 40px rgba(0,229,255,0.08), inset 0 0 30px rgba(0,0,0,0.3);
}
.slot-machine-card {
  text-align: center;
  padding: 12px;
}
.slot-machine-card.slot-flip {
  animation: slotFlip 0.1s ease-out;
}
.slot-machine-card.slot-selected {
  animation: slotBounce 0.5s ease;
}
@keyframes slotFlip {
  0% { transform: scaleY(0.2); opacity: 0.2; }
  100% { transform: scaleY(1); opacity: 1; }
}
@keyframes slotBounce {
  0% { transform: scale(1); }
  40% { transform: scale(1.12); }
  100% { transform: scale(1); }
}
.slot-card-img {
  width: 240px;
  height: 135px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.1);
}
.slot-card-placeholder {
  width: 240px;
  height: 135px;
  border-radius: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  color: var(--text-dim);
}
.slot-card-title {
  margin-top: 12px;
  font-size: 14px;
  font-weight: 600;
  color: rgba(255,255,255,0.9);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 270px;
}

/* ═══════════════════════ COMP RESULTS REDESIGN ═══════════════════════ */
.comp-results-header {
  margin-bottom: 24px;
}
.comp-results-title {
  font-size: 36px;
  font-weight: 900;
  letter-spacing: 2px;
}
.comp-results-song {
  font-size: 14px;
  color: var(--text-dim);
  margin-top: 4px;
}
.comp-results-grid {
  display: flex;
  gap: 16px;
  justify-content: center;
  align-items: stretch;
  margin-bottom: 20px;
}
.comp-result-col {
  flex: 1;
  max-width: 260px;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 16px;
  padding: 20px 16px;
  text-align: center;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.comp-result-col.winner {
  border-color: var(--green);
  box-shadow: 0 0 20px #00ff8833;
  background: linear-gradient(180deg, rgba(0,255,136,0.05) 0%, var(--surface) 100%);
}
.comp-result-col.loser {
  opacity: 0.7;
}
.comp-player-name {
  font-size: 14px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin: 0 0 12px;
}
.comp-player-grade {
  font-size: 48px;
  font-weight: 900;
  margin: 8px 0;
}
.comp-player-score {
  font-size: 32px;
  font-weight: 900;
  color: var(--cyan);
}
.comp-player-stats {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.8;
  margin-top: 12px;
  text-align: left;
  padding: 0 8px;
}
.comp-stat-row {
  display: flex;
  justify-content: space-between;
}
.comp-stat-row span:last-child { color: var(--text); font-weight: 600; }
.comp-result-vs {
  font-size: 20px;
  font-weight: 900;
  color: var(--text-dim);
  align-self: center;
  opacity: 0.5;
}
.comp-mmr-change {
  font-size: 18px;
  margin-bottom: 20px;
  padding: 10px 20px;
  background: var(--surface);
  border-radius: 10px;
  display: inline-block;
}
.comp-results-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
}

/* ═══════════════════════ COMP LOBBY ═══════════════════════ */
.comp-lobby-content {
  padding: 16px 24px;
  max-width: 700px;
  margin: 0 auto;
  overflow-y: auto;
  flex: 1;
  -webkit-overflow-scrolling: touch;
}
.comp-lobby-section { text-align: center; }
.comp-lobby-section.hidden { display: none; }
.comp-hint { font-size: 13px; color: var(--text-dim); margin-bottom: 16px; }

/* ═══════════════════════ COMP RESULTS PAGE ═══════════════════════ */
.comp-results-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: 40px 24px;
  text-align: center;
  overflow-y: auto;
}

/* ═══════════════════════ COMP WAITING PAGE ═══════════════════════ */
.comp-waiting-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: 40px 24px;
  text-align: center;
}

/* ═══════════════════════ BATTLE ROYALE ═══════════════════════ */
.br-queue-content {
  padding: 40px 24px;
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.br-queue-info h2 { font-size: 28px; margin-bottom: 8px; }
.br-desc { color: var(--text-dim); margin-bottom: 20px; font-size: 14px; }
.br-queue-status { text-align: center; }
.br-bot-timer { color: var(--text-dim); font-size: 13px; margin: 8px 0; }
.br-lobby-content {
  padding: 16px 24px;
  max-width: 700px;
  margin: 0 auto;
  overflow-y: auto;
  flex: 1;
}
.br-lobby-players {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}
.br-player-tag {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 13px;
  color: var(--text);
}
.br-player-tag.bot { color: var(--text-dim); font-style: italic; }
.br-lobby-timer { text-align: center; color: var(--cyan); font-size: 16px; font-weight: 700; margin-top: 16px; }
.br-lobby-timer.urgent { color: var(--red); animation: timerPulse 0.5s ease-in-out infinite; }
.br-results-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: 30px 24px;
  text-align: center;
  overflow-y: auto;
}
.br-results-title { font-size: 28px; margin-bottom: 8px; }
.br-placement { font-size: 22px; font-weight: 900; margin-bottom: 20px; }
.br-placement.winner { color: var(--yellow); }
.br-placement.top3 { color: var(--cyan); }
.br-placement.eliminated { color: var(--text-dim); }
.br-podium {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 8px;
  margin-bottom: 24px;
}
.br-podium-slot {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 120px;
}
.br-podium-crown { font-size: 28px; margin-bottom: 4px; }
.br-podium-name { font-weight: 700; font-size: 14px; margin-bottom: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 110px; }
.br-podium-score { font-size: 12px; color: var(--text-dim); margin-bottom: 6px; }
.br-podium-block {
  width: 100%;
  text-align: center;
  font-weight: 900;
  font-size: 16px;
  border-radius: 6px 6px 0 0;
  padding-top: 8px;
}
.br-podium-1 .br-podium-block { background: linear-gradient(to top, #b8860b, #ffd700); height: 100px; color: #000; }
.br-podium-2 .br-podium-block { background: linear-gradient(to top, #606060, #c0c0c0); height: 70px; color: #000; }
.br-podium-3 .br-podium-block { background: linear-gradient(to top, #6d3a00, #cd7f32); height: 50px; color: #000; }
.br-podium-1 .br-podium-name { color: var(--yellow); }
.br-podium-2 .br-podium-name { color: #c0c0c0; }
.br-podium-3 .br-podium-name { color: #cd7f32; }
.br-full-standings {
  width: 100%;
  max-width: 400px;
  margin-bottom: 20px;
}
.br-standing-row {
  display: flex;
  justify-content: space-between;
  padding: 6px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.br-standing-row.eliminated { color: var(--text-dim); text-decoration: line-through; }
.br-standing-row.self { color: var(--cyan); font-weight: 700; }