/* ═══════════════════════════════════════════
   Rhythmic – Main Stylesheet
   ═══════════════════════════════════════════ */

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-elevated: #1a1a26;
  --text-primary: #f0f0f5;
  --text-secondary: #8888a0;
  --text-muted: #555566;
  --accent: #f43f5e;
  --accent-glow: rgba(244, 63, 94, 0.3);
  --accent-secondary: #a855f7;
  --accent-tertiary: #3b82f6;
  --border-subtle: rgba(255, 255, 255, 0.06);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

#app {
  width: 100%;
  height: 100%;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ─── Main UI Container ─── */
.main-ui {
  position: relative;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  width: 100%;
  max-width: 600px;
  padding: 2rem;
  transition: var(--transition-smooth);
}

/* ─── Brand ─── */
.brand {
  text-align: center;
  transition: var(--transition-smooth);
  opacity: 1;
}

.brand.minimized {
  opacity: 0;
  transform: translateY(-30px) scale(0.8);
  pointer-events: none;
  position: absolute;
}

.brand-name {
  font-size: 3.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brand-tagline {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 300;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-top: 0.25rem;
}

/* ─── Track Info ─── */
.track-info {
  text-align: center;
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.track-info.hidden {
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  height: 0;
  overflow: hidden;
}

.track-info.visible {
  opacity: 1;
  transform: translateY(0);
}

.track-album-art {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  transition: var(--transition-smooth);
}

.track-album-art img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.track-title {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  max-width: 400px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.track-artist {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.track-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ─── Controls ─── */
.controls {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  transition: var(--transition-smooth);
}

.controls.shifted {
  transform: translateY(20px);
}

/* ─── Session Info ─── */
.session-info {
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: var(--transition-smooth);
}

.session-info.hidden {
  opacity: 0;
  height: 0;
  overflow: hidden;
  pointer-events: none;
}

.queue-indicator {
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.queue-indicator span {
  color: var(--accent);
  font-weight: 600;
}

.btn-save-mix {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-family: var(--font);
  cursor: pointer;
  transition: var(--transition-fast);
  letter-spacing: 0.05em;
}

.btn-save-mix:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ─── User Menu ─── */
.user-menu {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  z-index: 100;
  transition: var(--transition-fast);
}

.user-menu.hidden { display: none; }

.user-avatar-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 0.3rem 1rem 0.3rem 0.3rem;
  cursor: pointer;
  transition: var(--transition-fast);
  color: var(--text-primary);
  font-family: var(--font);
}

.user-avatar-btn:hover {
  border-color: rgba(255, 255, 255, 0.15);
  background: var(--bg-secondary);
}

.user-avatar-img {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--accent);
}

.user-name {
  font-size: 0.85rem;
  font-weight: 500;
}

.user-dropdown {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.5rem;
  min-width: 180px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
}

.user-dropdown.hidden { display: none; }

.dropdown-item {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  color: var(--text-primary);
  padding: 0.6rem 0.8rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-family: var(--font);
  cursor: pointer;
  transition: var(--transition-fast);
}

.dropdown-item:hover { background: rgba(255, 255, 255, 0.06); }
.dropdown-item.danger { color: var(--accent); }
.dropdown-item.danger:hover { background: rgba(244, 63, 94, 0.1); }

/* ─── Premium Badge ─── */
.premium-badge {
  position: fixed;
  top: 1.5rem;
  left: 1.5rem;
  z-index: 100;
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.15), rgba(244, 63, 94, 0.15));
  border: 1px solid rgba(168, 85, 247, 0.3);
  border-radius: var(--radius-full);
  padding: 0.3rem 0.8rem;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--accent-secondary);
}

.premium-badge.hidden { display: none; }

/* ─── Toast ─── */
.toast-container {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
}

.toast {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.8rem 1.5rem;
  font-size: 0.85rem;
  color: var(--text-primary);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  animation: toastIn 0.3s ease-out, toastOut 0.3s ease-in 2.7s forwards;
  max-width: 400px;
  text-align: center;
}

.toast.error { border-color: rgba(244, 63, 94, 0.3); }
.toast.success { border-color: rgba(52, 211, 153, 0.3); }

@keyframes toastIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(-10px); }
}

/* ─── Hidden utility ─── */
.hidden { display: none !important; }

/* ─── Responsive ─── */
@media (max-width: 640px) {
  .brand-name { font-size: 2.5rem; }
  .controls { flex-direction: column; gap: 1rem; }
  .track-title { font-size: 1.2rem; max-width: 280px; }
  .main-ui { padding: 1rem; }
}

/* ─── Footer ─── */
.site-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  text-align: center;
  padding: 1rem 1.5rem;
  font-size: 0.78rem;
  color: var(--text-secondary);
  background: linear-gradient(to top, rgba(10, 10, 15, 0.85), transparent);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 10;
  transition: opacity 0.3s;
}

.footer-inner {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-dot { opacity: 0.3; }

.footer-copy {
  color: var(--text-muted);
  font-size: 0.72rem;
}

.footer-copy { opacity: 0.6; }