:root {
  --bg: #0d1117;
  --bg-elevated: #121826;
  --bg-panel: #161d2d;
  --bg-soft: #1a2132;
  --text: #e6ebf5;
  --muted: #91a0b7;
  --primary: #7c6cff;
  --primary-strong: #5a4de0;
  --secondary: #243049;
  --danger: #ff6b7a;
  --border: rgba(255, 255, 255, 0.08);
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
}

html[data-theme="light"] {
  --bg: #f5f7fb;
  --bg-elevated: #ffffff;
  --bg-panel: #ffffff;
  --bg-soft: #edf1f7;
  --text: #132033;
  --muted: #5d6b80;
  --primary: #5c52ff;
  --primary-strong: #4638df;
  --secondary: #d8e0ef;
  --danger: #dc4c64;
  --border: rgba(10, 25, 41, 0.08);
  --shadow: 0 22px 50px rgba(17, 25, 40, 0.08);
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--bg); color: var(--text); font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
button { cursor: pointer; }
img { max-width: 100%; display: block; }

.app-layout { display: grid; grid-template-columns: 280px 1fr; min-height: 100vh; }
.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 24px;
  background: linear-gradient(180deg, var(--bg-elevated), var(--bg-panel));
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 24px;
  z-index: 20;
}
.brand { display: flex; gap: 14px; align-items: center; }
.brand-mark,
.brand-mark-img,
.artwork {
  width: 54px;
  height: 54px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--primary), #22c1c3);
  color: white;
  font-weight: 800;
  box-shadow: var(--shadow);
  object-fit: cover;
}
.brand-name, .topbar-title, h1, h2, h3 { margin: 0; }
.brand-tagline, .eyebrow, .sidebar-label, .stat-label, .player-label, .control-label, .field-note, .auth-note, .auth-copy p, .page-header p, .hero p, .card p, .sidebar-username, .definition-list dd { color: var(--muted); }
.brand-name { font-size: 1.1rem; font-weight: 800; }
.brand-tagline { font-size: 0.9rem; }
.nav { display: flex; flex-direction: column; gap: 10px; }
.nav-link {
  padding: 14px 16px;
  border-radius: 14px;
  background: transparent;
  color: var(--text);
  transition: background 0.2s ease, transform 0.2s ease;
}
.nav-link:hover, .nav-link:focus-visible { background: var(--bg-soft); transform: translateX(2px); }
.sidebar-card, .panel, .public-card, .error-panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}
.sidebar-card { padding: 16px; display: flex; flex-direction: column; gap: 12px; margin-top: auto; }
.main-shell { display: flex; flex-direction: column; min-width: 0; }
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 24px;
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 15;
}
.topbar-title { font-size: 1.4rem; }
.topbar-eyebrow, .eyebrow { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--primary); font-weight: 700; }
.content { padding: 24px; padding-bottom: 260px; min-width: 0; }
.page-grid { display: grid; gap: 20px; }
.page-header {
  padding: 24px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
}
.header-stats { display: flex; gap: 12px; flex-wrap: wrap; }
.stat {
  min-width: 100px;
  padding: 14px 16px;
  border-radius: 16px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
}
.stat strong { font-size: 1.3rem; display: block; margin-top: 4px; }
.toolbar, .form-grid, .inline-form, .button-row, .transport-row, .inline-controls, .queue-header, .card-body, .seek-row {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}
.toolbar { padding: 20px; }
.input, .button, select, input[type="search"], input[type="text"], input[type="number"], input[type="password"], input[type="file"], textarea {
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--text);
}
.input, select, input[type="search"], input[type="text"], input[type="number"], input[type="password"] {
  width: 100%;
  padding: 13px 14px;
  outline: none;
}
.input:focus, select:focus, input:focus, textarea:focus, button:focus-visible {
  border-color: color-mix(in srgb, var(--primary) 70%, white);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 25%, transparent);
}
.button, .icon-button {
  border: 1px solid transparent;
  padding: 12px 16px;
  border-radius: 14px;
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease, opacity 0.18s ease;
}
.button:hover, .icon-button:hover { transform: translateY(-1px); }
.button-primary { background: linear-gradient(135deg, var(--primary), var(--primary-strong)); color: white; }
.button-secondary { background: var(--secondary); color: var(--text); }
.button-danger { background: color-mix(in srgb, var(--danger) 18%, var(--bg-soft)); color: var(--danger); }
.button-block { width: 100%; justify-content: center; }
.button-small { padding: 8px 12px; border-radius: 12px; }
.icon-button {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  background: var(--bg-soft);
  color: var(--text);
  border-color: var(--border);
}
.icon-button-primary { background: linear-gradient(135deg, var(--primary), var(--primary-strong)); color: white; }
.panel { padding: 20px; }
.library-grid, .card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 18px;
}
.library-card, .card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 16px;
}
.card-body { align-items: flex-start; }
.artwork {
  flex: 0 0 auto;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #7c6cff, #22c1c3);
}
.artwork::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.35), transparent 38%);
}
.artwork span { position: relative; z-index: 1; font-weight: 800; letter-spacing: 0.08em; }
.artwork-large { width: 160px; height: 160px; border-radius: 34px; font-size: 2rem; }
.artwork-small { width: 64px; height: 64px; border-radius: 20px; }
.hero-logo { width: 160px; height: 160px; border-radius: 34px; box-shadow: var(--shadow); object-fit: contain; padding: 8px; }
.song-meta, .card-meta { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.song-title, .card h3, .player-title { font-size: 1.05rem; font-weight: 700; }
.song-artist, .song-album { color: var(--muted); font-size: 0.95rem; }
.track-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.track-actions .button { padding: 10px 12px; }
.upload-panel .form-grid, .form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); align-items: end; }
.form-grid label { display: flex; flex-direction: column; gap: 8px; }
.field-error { color: var(--danger); font-size: 0.92rem; margin-top: 6px; }
.field-note { margin-top: 12px; min-height: 1.2em; }
.empty-state { text-align: center; padding: 32px; }
.player-dock {
  position: fixed;
  left: 280px;
  right: 0;
  bottom: 0;
  z-index: 30;
  display: grid;
  grid-template-columns: minmax(250px, 1.2fr) 1.6fr minmax(240px, 0.9fr) minmax(260px, 1fr);
  gap: 18px;
  padding: 16px 22px;
  background: color-mix(in srgb, var(--bg-elevated) 94%, transparent);
  border-top: 1px solid var(--border);
  backdrop-filter: blur(18px);
}
.player-now-playing, .player-transport, .player-side, .player-queue { min-width: 0; }
.player-now-playing { display: flex; gap: 14px; align-items: center; }
.player-title, .player-subtitle { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.player-transport { display: flex; flex-direction: column; gap: 10px; }
.seek-row { width: 100%; }
.seek-row input[type="range"], #player-volume { width: 100%; }
.player-side { display: flex; flex-direction: column; gap: 8px; }
.player-queue { display: flex; flex-direction: column; gap: 10px; }
.queue-list {
  max-height: 120px;
  overflow: auto;
  display: grid;
  gap: 8px;
}
.queue-item {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
  padding: 10px 12px;
  border-radius: 12px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
}
.queue-item[draggable="true"] { cursor: grab; }
.queue-item.drag-over { outline: 2px dashed var(--primary); }
.queue-item-title { font-weight: 600; }
.queue-item-meta { color: var(--muted); font-size: 0.9rem; }
.dialog::backdrop { background: rgba(0, 0, 0, 0.55); }
.dialog { border: none; background: transparent; }
.dialog-card { width: min(520px, calc(100vw - 24px)); }
.auth-layout, .hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: center;
}
.public-card { max-width: 1120px; margin: 32px auto; padding: 24px; }
.hero-copy h1, .auth-copy h1 { font-size: clamp(2.2rem, 4vw, 4rem); line-height: 1.04; }
.hero-panel { display: grid; gap: 18px; }
.hero-art { display: flex; justify-content: center; }
.feature-list { margin: 0; padding-left: 20px; color: var(--muted); display: grid; gap: 10px; }
.auth-form { padding: 24px; display: grid; gap: 14px; }
.auth-form label { display: grid; gap: 8px; }
.definition-list { display: grid; gap: 16px; }
.definition-list div { padding: 14px 0; border-bottom: 1px solid var(--border); }
.definition-list dt { font-weight: 700; }
.flash-stack { display: grid; gap: 10px; margin-bottom: 18px; }
.flash {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--bg-panel);
}
.flash-success { border-color: color-mix(in srgb, #31c48d 40%, var(--border)); }
.flash-error { border-color: color-mix(in srgb, var(--danger) 40%, var(--border)); }
.flash-info { border-color: color-mix(in srgb, var(--primary) 40%, var(--border)); }
.flash-dismiss { background: transparent; border: none; color: var(--muted); font-size: 1.2rem; }
.overlay { display: none; }
.sidebar-toggle { display: none; }
.public-shell { display: grid; min-height: 100vh; place-items: center; padding: 24px; }
.public-shell-wrap { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.error-panel { max-width: 620px; margin: 0 auto; text-align: center; display: grid; gap: 16px; padding: 32px; }
.select-grid { display: grid; gap: 14px; }
.playlist-list { display: grid; gap: 12px; }
.playlist-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 14px;
  border-radius: 16px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
}
.playlist-row .actions { display: flex; gap: 8px; flex-wrap: wrap; }

@media (max-width: 1200px) {
  .player-dock { grid-template-columns: 1fr 1fr; left: 0; }
  .content { padding-bottom: 340px; }
}

@media (max-width: 900px) {
  .app-layout { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 280px;
    transform: translateX(-100%);
    transition: transform 0.22s ease;
  }
  body.sidebar-open .sidebar { transform: translateX(0); }
  body.sidebar-open .overlay {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    z-index: 12;
  }
  .sidebar-toggle { display: grid; }
  .player-dock { left: 0; grid-template-columns: 1fr; }
  .auth-layout, .hero, .page-header { grid-template-columns: 1fr; display: grid; }
}

@media (max-width: 640px) {
  .content { padding: 16px; padding-bottom: 420px; }
  .topbar { padding: 14px 16px; }
  .toolbar, .button-row, .inline-form, .transport-row, .inline-controls { flex-direction: column; align-items: stretch; }
  .player-now-playing { align-items: flex-start; }
  .queue-item, .playlist-row { grid-template-columns: 1fr; }
}