:root {
  --bg: #0b0f14;
  --panel: #121922;
  --panel-2: #182230;
  --border: #273243;
  --text: #eaf1fb;
  --muted: #9eb0c7;
  --primary: #4dd0e1;
  --primary-dark: #24a8ba;
  --success: #31c48d;
  --danger: #ef4444;
  --shadow: 0 18px 50px rgba(0,0,0,.35);
  --radius: 18px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, system-ui, sans-serif;
  background: linear-gradient(180deg, #081019 0%, #0d141d 100%);
  color: var(--text);
}
a { color: inherit; text-decoration: none; }
.login-body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px;
}
.login-shell { width: 100%; max-width: 460px; }
.login-card, .panel, .stat-card, .artist-card {
  background: rgba(18,25,34,.92);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.login-card {
  padding: 32px;
}
.brand {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-bottom: 28px;
}
.brand-mark {
  width: 54px;
  height: 54px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--primary), #6ee7b7);
  color: #041016;
  font-size: 28px;
  font-weight: 700;
}
.brand h1, .topbar h1 { margin: 0; }
.brand p, .eyebrow, .muted, .panel-head p { color: var(--muted); }
.form-stack {
  display: grid;
  gap: 16px;
}
.form-stack.compact { gap: 14px; }
label {
  display: grid;
  gap: 8px;
  font-size: 14px;
  color: var(--muted);
}
.field-hint {
  font-size: 12px;
  color: var(--muted);
  opacity: 0.7;
}
input, select, textarea {
  width: 100%;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  border-radius: 12px;
  padding: 12px 14px;
  outline: none;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(77,208,225,.15);
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  padding: 12px 16px;
  border: 1px solid transparent;
  font-weight: 600;
  cursor: pointer;
}
.btn.small { padding: 9px 12px; font-size: 13px; }
.btn-primary {
  background: linear-gradient(135deg, var(--primary), #6ee7b7);
  color: #051016;
}
.btn-primary:hover { filter: brightness(1.05); }
.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost:hover {
  background: rgba(77,208,225,.07);
  border-color: var(--primary);
}
.topbar {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  padding: 28px 32px 12px;
  flex-wrap: wrap;
}
.topbar-actions {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}
.user-pill, .count-pill, .status-badge {
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 700;
}
.user-pill, .count-pill {
  background: rgba(77,208,225,.12);
  color: #9de8f2;
}
.app-grid {
  display: grid;
  gap: 22px;
  padding: 20px 32px 40px;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 18px;
}
.stat-card {
  padding: 22px;
}
.stat-card span {
  display: block;
  color: var(--muted);
  margin-bottom: 8px;
}
.stat-card strong {
  font-size: 34px;
}
.stat-card.success {
  border-color: rgba(49,196,141,.35);
}
.panel {
  padding: 24px;
}
.two-col {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 24px;
}
.inline-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.artist-list {
  display: grid;
  gap: 18px;
}
.artist-card {
  padding: 20px;
}
.artist-header, .panel-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 14px;
}
.toggle-arrow {
  display: inline-block;
  transition: transform 0.18s ease;
  font-size: 11px;
}
.gap-table-wrap {
  overflow-x: auto;
}
.gap-table {
  width: 100%;
  border-collapse: collapse;
}
.gap-table th, .gap-table td {
  padding: 14px 10px;
  border-top: 1px solid rgba(158,176,199,.14);
  vertical-align: top;
  text-align: left;
}
.gap-table th {
  color: var(--muted);
  font-size: 13px;
}
.status-badge.missing {
  background: rgba(239,68,68,.14);
  color: #fca5a5;
}
.status-badge.acquired {
  background: rgba(49,196,141,.14);
  color: #86efac;
}
.audio-player {
  max-width: 220px;
  height: 36px;
}
/* Tracklist Accordion */
.tracklist-accordion {
  margin-top: 16px;
  border-top: 1px solid rgba(158,176,199,.12);
  padding-top: 14px;
  animation: fadeIn 0.2s ease;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}
.tracklist-label {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.tracklist-table td, .tracklist-table th {
  padding: 10px 8px;
  font-size: 13px;
}
.fmt-badge {
  border-radius: 6px;
  padding: 3px 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.fmt-mp3  { background: rgba(77,208,225,.15); color: #9de8f2; }
.fmt-flac { background: rgba(49,196,141,.15); color: #86efac; }
.fmt-wav  { background: rgba(209,153,0,.15);  color: #fcd34d; }
.error-box, .hint-box, .empty-state {
  border-radius: 12px;
  padding: 12px 14px;
}
.error-box {
  background: rgba(239,68,68,.12);
  border: 1px solid rgba(239,68,68,.22);
  color: #fca5a5;
}
.hint-box, .empty-state {
  background: rgba(158,176,199,.08);
  border: 1px solid rgba(158,176,199,.12);
  color: var(--muted);
}
.empty-state.large {
  padding: 28px;
  text-align: center;
}
@media (max-width: 1200px) {
  .stats-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 1100px) {
  .two-col { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .topbar, .artist-header, .panel-head { flex-direction: column; align-items: flex-start; }
  .stats-grid, .two-col, .inline-grid { grid-template-columns: 1fr; }
  .app-grid, .topbar { padding-left: 16px; padding-right: 16px; }
  .login-card, .panel, .artist-card, .stat-card { padding: 18px; }
}