/* === app.css — Music Herebuy (dark theme, responsive) === */

:root {
  --bg-0: #0b0c10;
  --bg-1: #13151d;
  --bg-2: #1a1d27;
  --bg-3: #232633;
  --text: #e2e2e8;
  --text-dim: #8888a0;
  --accent: #7b61ff;
  --accent-2: #ff61a6;
  --accent-3: #4ecdc4;
  --gold: #f5c542;
  --border: #2a2d3b;
  --radius: 10px;
  --shadow: 0 4px 20px rgba(0,0,0,0.4);
}

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

html, body {
  background: var(--bg-0);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', system-ui, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; height: 520px;
  background:
    radial-gradient(ellipse 80% 60% at 20% 0%, rgba(123,97,255,0.22), transparent 60%),
    radial-gradient(ellipse 60% 50% at 90% 10%, rgba(255,97,166,0.16), transparent 60%),
    radial-gradient(ellipse 80% 40% at 50% 100%, rgba(78,205,196,0.10), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.container {
  max-width: 920px;
  margin: 0 auto;
  padding: 28px 20px 60px;
  position: relative;
  z-index: 1;
}

/* ── Header ── */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0 8px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 28px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand .logo {
  width: 36px; height: 36px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 30%, var(--accent-2), var(--accent) 70%, transparent 75%),
    var(--bg-2);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
}
.brand .name { font-weight: 700; font-size: 18px; letter-spacing: -0.3px; }
.brand .tag { color: var(--text-dim); font-size: 12px; }
.nav { display: flex; gap: 14px; }
.nav a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 13px;
  transition: color 0.2s;
}
.nav a:hover, .nav a.active { color: var(--accent-2); }

/* ── Page title ── */
.page-title { margin-bottom: 22px; }
.page-title h1 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.page-title p { color: var(--text-dim); font-size: 13px; margin-top: 4px; }
.page-title .date-badge {
  display: inline-block;
  margin-top: 8px;
  padding: 4px 10px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 12px;
  color: var(--text-dim);
}

/* ── Chart tab ── */
.tab-bar { display: flex; gap: 8px; margin-bottom: 18px; flex-wrap: wrap; }
.tab-bar button {
  background: var(--bg-2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 7px 14px;
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
}
.tab-bar button:hover { border-color: var(--accent); color: var(--text); }
.tab-bar button.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* ── Track list ── */
.track-list { display: flex; flex-direction: column; gap: 6px; }
.track-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius);
  transition: background 0.15s;
}
.track-row:hover { background: var(--bg-2); }
.track-row .rank {
  width: 28px;
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.track-row .rank.top3 { color: var(--gold); font-weight: 700; }
.track-row .info { flex: 1; min-width: 0; }
.track-row .title { font-weight: 600; font-size: 14.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.track-row .artist { color: var(--text-dim); font-size: 13px; }
.track-row .meta { color: var(--text-dim); font-size: 11.5px; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.track-row .meta .playcount { color: var(--accent-3); }
.track-row .sp-link {
  flex-shrink: 0;
  color: var(--accent);
  text-decoration: none;
  font-size: 12px;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  transition: all 0.2s;
}
.track-row .sp-link:hover { background: var(--accent); color: #fff; }

/* ── Ideas page ── */
.ideas-grid { display: grid; grid-template-columns: 1fr; gap: 14px; }
.idea-card {
  background: linear-gradient(135deg, var(--bg-2), var(--bg-1));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  box-shadow: var(--shadow);
  transition: border-color 0.2s, transform 0.15s;
}
.idea-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.idea-card .header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.idea-card .mood {
  background: var(--accent);
  color: #fff;
  font-size: 11.5px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
  letter-spacing: 0.3px;
  text-transform: uppercase;
}
.idea-card .style-hint {
  color: var(--accent-2);
  font-size: 11.5px;
  background: var(--bg-0);
  padding: 3px 8px;
  border-radius: 6px;
  border: 1px solid var(--border);
}
.idea-card .prompt {
  font-size: 14px;
  color: var(--text);
  line-height: 1.55;
  margin-bottom: 12px;
}
.idea-card .generated {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px;
  background: var(--bg-0);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.idea-card .generated .dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}
.idea-card .generated .dot.ready { background: var(--accent-3); box-shadow: 0 0 0 0 rgba(78,205,196,0.5); animation: pulse 2s infinite; }
.idea-card .generated .dot.empty { background: var(--text-dim); }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(78,205,196,0.6); } 70% { box-shadow: 0 0 0 10px rgba(78,205,196,0); } 100% { box-shadow: 0 0 0 0 rgba(78,205,196,0); } }
.idea-card .generated .state { color: var(--text-dim); font-size: 12.5px; flex: 1; }
.idea-card .generated audio { flex-shrink: 0; }

/* ── Track detail page ── */
.track-detail {
  background: linear-gradient(135deg, var(--bg-2), var(--bg-1));
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 26px 24px;
  box-shadow: var(--shadow);
  max-width: 640px;
  margin: 0 auto;
}
.track-detail .cover {
  width: 180px; height: 180px;
  border-radius: 12px;
  margin: 0 auto 22px;
  background:
    radial-gradient(circle at 30% 30%, var(--accent-2), var(--accent) 60%, var(--bg-0) 100%);
  display: flex; align-items: center; justify-content: center;
  font-size: 56px;
}
.track-detail h2 { font-size: 22px; text-align: center; margin-bottom: 4px; }
.track-detail .artist { text-align: center; color: var(--text-dim); margin-bottom: 18px; }
.track-detail .meta-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 16px; }
.track-detail .meta-item {
  padding: 10px 12px;
  background: var(--bg-0);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
}
.track-detail .meta-item .label { color: var(--text-dim); font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; display: block; margin-bottom: 3px; }
.track-detail .meta-item .value { word-break: break-all; color: var(--accent); }
.track-detail .sp-link-big {
  display: block;
  text-align: center;
  padding: 11px;
  margin-top: 18px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  transition: background 0.2s;
}
.track-detail .sp-link-big:hover { background: var(--accent-2); }

/* ── Footer ── */
footer {
  margin-top: 50px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 12px;
  text-align: center;
}
.tag-cloud { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; margin-bottom: 12px; }
.tag-cloud span {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 3px 9px;
  font-size: 11.5px;
  color: var(--text-dim);
}
.tag-cloud span.hot { color: var(--accent-2); border-color: var(--accent-2); }

/* ── Loading / empty / error ── */
.loading, .empty, .error {
  text-align: center;
  padding: 50px 20px;
  color: var(--text-dim);
}
.loading::after {
  content: '';
  display: inline-block;
  width: 18px; height: 18px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-left: 10px;
  vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }
.error { color: var(--accent-2); }

/* ── Responsive ── */
@media (min-width: 600px) {
  .ideas-grid { grid-template-columns: 1fr 1fr; }
  .track-detail { padding: 30px 32px; }
}
@media (max-width: 480px) {
  header { flex-direction: column; gap: 10px; }
  .track-row .sp-link { display: none; }
}