:root {
  color-scheme: dark;
  --bg: #07101a;
  --panel: #0e1d2b;
  --panel-light: #142b3d;
  --accent: #37d6a3;
  --text: #eef8fb;
  --muted: #a8bdc9;
  --danger: #fb7676;
  --line: rgba(255, 255, 255, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at top right, rgba(55, 214, 163, 0.15), transparent 30rem),
    linear-gradient(145deg, #061019, var(--bg));
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, sans-serif;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  width: min(100% - 2rem, 980px);
  margin: 0 auto;
  padding: 3rem 0 5rem;
}

.hero,
.player-card,
.upload-card,
.admin-card,
.playlist-card {
  background: rgba(14, 29, 43, 0.92);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.22);
}

.hero {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 1.5rem;
  padding: 2rem;
}

.eyebrow {
  margin: 0 0 0.4rem;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.13em;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0.4rem;
  font-size: clamp(2rem, 5vw, 3.5rem);
}

.subtitle,
.track-artist,
.now-playing p,
.drop-zone span,
.status-message,
.reorder-message {
  color: var(--muted);
}

.account-panel {
  width: min(100%, 310px);
}

.login-form,
.create-user-form {
  display: grid;
  gap: 0.75rem;
}

label {
  display: grid;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.85rem;
}

input,
select {
  width: 100%;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  outline: none;
  background: #061019;
  color: var(--text);
}

input:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(55, 214, 163, 0.15);
}

button {
  padding: 0.7rem 0.9rem;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #032218;
  font-weight: 800;
}

button:hover {
  background: #61e8bd;
}

.secondary-button,
.icon-button {
  background: var(--panel-light);
  color: var(--text);
}

.player-card {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 1.5rem;
  align-items: center;
  margin-bottom: 1.5rem;
  padding: 1.5rem;
}

.album-art {
  display: grid;
  width: 170px;
  aspect-ratio: 1;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, #37d6a3, #134767);
  color: #04131b;
  font-size: 5rem;
  font-weight: 900;
}

.timeline {
  display: grid;
  grid-template-columns: 42px 1fr 42px;
  align-items: center;
  gap: 0.7rem;
  margin: 1.2rem 0;
  color: var(--muted);
  font-size: 0.8rem;
}

input[type="range"] {
  padding: 0;
  accent-color: var(--accent);
}

.player-controls {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.icon-button,
.play-button {
  display: grid;
  place-items: center;
  border-radius: 999px;
}

.icon-button {
  width: 44px;
  height: 44px;
}

.play-button {
  width: 56px;
  height: 56px;
  font-size: 1.25rem;
}

.upload-card,
.admin-card,
.playlist-card {
  margin-top: 1.5rem;
  padding: 1.5rem;
}

.drop-zone {
  display: grid;
  gap: 0.45rem;
  place-items: center;
  min-height: 150px;
  margin-top: 1rem;
  padding: 1.5rem;
  border: 2px dashed rgba(55, 214, 163, 0.5);
  border-radius: 12px;
  background: rgba(55, 214, 163, 0.06);
  text-align: center;
  cursor: pointer;
}

.drop-zone.dragging {
  border-color: var(--accent);
  background: rgba(55, 214, 163, 0.17);
}

.playlist-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.track-count {
  color: var(--muted);
  font-size: 0.85rem;
}

.playlist {
  display: grid;
  gap: 0.7rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.track-row {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: 0.85rem;
  padding: 0.85rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.025);
  transition: 0.15s ease;
}

.track-row.active {
  border-color: rgba(55, 214, 163, 0.85);
  background: rgba(55, 214, 163, 0.1);
}

.track-row.draggable-track {
  cursor: grab;
}

.track-row.draggable-track:active,
.track-row.dragging-track {
  cursor: grabbing;
  opacity: 0.55;
}

.track-row.drag-over {
  border-color: var(--accent);
  background: rgba(55, 214, 163, 0.16);
  transform: translateY(-2px);
}

.track-play {
  width: 38px;
  height: 38px;
  padding: 0;
  border-radius: 999px;
}

.track-details {
  display: grid;
  gap: 0.2rem;
  min-width: 0;
}

.track-title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.track-download {
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 800;
  text-decoration: none;
}

.track-delete {
  background: transparent;
  color: var(--danger);
  padding: 0.3rem;
}

.empty-state {
  margin: 1.5rem 0 0;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 700px) {
  .hero,
  .player-card {
    grid-template-columns: 1fr;
  }

  .hero {
    display: grid;
  }

  .account-panel,
  .album-art {
    width: 100%;
  }

  .album-art {
    max-width: 220px;
  }

  .track-row {
    grid-template-columns: auto 1fr auto;
  }

  .track-delete {
    grid-column: 2 / 4;
    justify-self: start;
  }
}