:root {
  --bg: #09111f;
  --bg-soft: rgba(12, 23, 44, 0.72);
  --panel: rgba(20, 33, 58, 0.88);
  --line: rgba(255, 255, 255, 0.1);
  --text: #eff6ff;
  --muted: #9fb3c8;
  --accent: #61d7b6;
  --accent-2: #f6b15f;
  --danger: #ff7b7b;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "PingFang SC", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(97, 215, 182, 0.22), transparent 30%),
    radial-gradient(circle at top right, rgba(246, 177, 95, 0.18), transparent 28%),
    linear-gradient(135deg, #08101d 0%, #0d1d35 54%, #10284c 100%);
}

.page-shell {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 24px;
  padding: 24px;
}

.glass {
  backdrop-filter: blur(18px);
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.sidebar,
.content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.sidebar {
  padding: 24px;
}

.brand h1,
.hero h2 {
  margin: 0;
  font-size: 2rem;
}

.eyebrow {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.72rem;
  color: var(--accent);
}

.subtext {
  color: var(--muted);
  line-height: 1.6;
}

.panel,
.hero,
.library-panel,
.queue-panel {
  padding: 20px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 14px;
}

.panel-head h2 {
  margin: 0;
  font-size: 1.05rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 0.92rem;
}

input {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  border-radius: 14px;
  padding: 12px 14px;
}

button {
  border: 0;
  border-radius: 999px;
  padding: 11px 16px;
  cursor: pointer;
  transition: transform 0.18s ease, opacity 0.18s ease, background 0.18s ease;
}

button:hover {
  transform: translateY(-1px);
}

.primary-btn {
  background: linear-gradient(135deg, var(--accent), #2eb6f0);
  color: #072035;
  font-weight: 700;
}

.secondary-btn,
.ghost-btn {
  background: rgba(255, 255, 255, 0.07);
  color: var(--text);
}

.secondary-btn.active,
.ghost-btn.active {
  background: rgba(97, 215, 182, 0.18);
  color: var(--accent);
}

.content {
  min-width: 0;
}

.hero {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

audio {
  width: 100%;
}

.library-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 24px;
}

.folder-tree,
.queue-list,
.playlist-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 62vh;
  overflow: auto;
  padding-right: 4px;
}

.folder-node {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 14px;
  background: rgba(255, 255, 255, 0.03);
}

.folder-node h3,
.folder-node h4 {
  margin: 0 0 8px;
}

.folder-actions,
.track-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.track-item,
.playlist-item {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 14px;
  background: rgba(255, 255, 255, 0.03);
}

.track-name {
  display: block;
  margin-bottom: 5px;
}

.track-path {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
  word-break: break-all;
}

.playlist-item p {
  margin: 4px 0 0;
  color: var(--muted);
}

@media (max-width: 1080px) {
  .page-shell,
  .library-grid {
    grid-template-columns: 1fr;
  }

  .sidebar {
    order: 2;
  }
}