:root, [data-theme="dark"] {
  --bg:           #0E0E14;
  --surface:      #16161E;
  --surface-2:    #1E1E28;
  --border:       #2A2A36;
  --text:         #ECECF2;
  --text-dim:     #7878A0;
  --text-bright:  #FFFFFF;
  --key-current:  #4F9D69;     /* 4B = A-Dur green */
  --bpm:          #E0B423;
  --match:        #4F9D69;
  --mic:          #D62828;
}
[data-theme="light"] {
  --bg:           #F4F4F8;
  --surface:      #FFFFFF;
  --surface-2:    #ECECF1;
  --border:       #DCDCE4;
  --text:         #1A1A22;
  --text-dim:     #6A6A78;
  --text-bright:  #000000;
  --key-current:  #2E7A48;
  --bpm:          #B88A1A;
  --match:        #2E7A48;
  --mic:          #C4202A;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  -webkit-font-smoothing: antialiased;
  transition: background-color .18s, color .18s;
}
body { padding: 24px 32px; min-height: 100vh; }
.container { max-width: 1600px; margin: 0 auto; }

.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.brand { font-family: 'JetBrains Mono', monospace; font-size: 12px; font-weight: 700; letter-spacing: 0.3em; }
.topbar-right { display: flex; align-items: center; gap: 18px; }
.status { display: flex; align-items: center; gap: 8px; font-family: 'JetBrains Mono', monospace; font-size: 11px; color: var(--text-dim); letter-spacing: 0.12em; text-transform: uppercase; cursor: pointer; transition: color 0.12s; }
.status:hover { color: var(--text); }
.status i { color: var(--mic); font-size: 14px; }
.status.paused i { color: var(--text-dim); }

.theme-toggle {
  background: none; border: 1px solid var(--border); border-radius: 4px;
  padding: 5px 12px; color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace; font-size: 10px; letter-spacing: 0.15em; text-transform: uppercase;
  cursor: pointer; transition: all .12s;
}
.theme-toggle:hover { color: var(--text); border-color: var(--text-dim); }

.hero {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  position: relative;
  overflow: hidden;
  transition: grid-template-columns .3s ease, padding .3s ease, min-height .3s ease;
  min-height: 280px;
}
.hero::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0;
  width: 3px; background: var(--key-current);
  transition: background-color .18s;
}
/* WHEEL expanded mode */
.hero.wheel-mode {
  grid-template-columns: 1fr;
  padding: 48px;
  min-height: 600px;
}
.hero.wheel-mode .cover,
.hero.wheel-mode .info-top,
.hero.wheel-mode .info-mid { display: none; }
.hero.wheel-mode .info-bot { padding-top: 0; justify-content: center; }
.hero.wheel-mode .wheel-container { width: 100%; max-width: 520px; height: 520px; }
/* COVER expanded mode */
.hero.cover-mode { grid-template-columns: 1fr; min-height: 540px; }
.hero.cover-mode .info { display: none; }
.hero.cover-mode .cover {
  width: 100%; max-width: 480px; margin: 0 auto;
  aspect-ratio: 1; max-height: 460px;
}
@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; }
}

.cover {
  width: 100%; aspect-ratio: 1; max-height: 240px;
  border-radius: 8px; background: var(--surface-2);
  overflow: hidden; position: relative; cursor: pointer;
  transition: transform .15s;
}
.cover:hover { transform: scale(1.01); }
.cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.cover::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(79, 157, 105, 0.20), transparent 60%);
  pointer-events: none;
}
.cover-placeholder {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 8px;
  font-family: 'JetBrains Mono', monospace; font-size: 10px; color: var(--text-dim);
  letter-spacing: 0.2em; text-transform: uppercase;
}
.cover-placeholder .note { font-size: 32px; opacity: 0.3; }

.info { display: flex; flex-direction: column; min-width: 0; }
.info-top { display: flex; flex-direction: column; position: relative; }
.info-mid { display: flex; flex-direction: column; gap: 14px; margin-top: 16px; }
.info-bot { margin-top: auto; padding-top: 20px; display: flex; justify-content: flex-end; align-items: flex-end; min-height: 160px; }

.track-title { font-size: 30px; font-weight: 600; line-height: 1.1; letter-spacing: -0.01em; margin-bottom: 4px; }
.track-artist { font-size: 15px; color: var(--text-dim); }

.search-fallback-btn {
  position: absolute; top: 0; right: 0;
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 4px;
  padding: 6px 12px; color: var(--text-dim); font-size: 11px; cursor: pointer;
  font-family: 'JetBrains Mono', monospace; letter-spacing: 0.1em; text-transform: uppercase;
  transition: all .12s;
}
.search-fallback-btn:hover { background: var(--border); color: var(--text); }
.search-fallback-btn i { margin-right: 6px; }

.stats-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: 6px; overflow: hidden; }
.stat { background: var(--surface); padding: 12px 14px; }
.stat-label { font-family: 'JetBrains Mono', monospace; font-size: 9px; letter-spacing: 0.22em; text-transform: uppercase; color: var(--text-dim); margin-bottom: 6px; }
.stat-value { font-family: 'JetBrains Mono', monospace; font-size: 22px; font-weight: 700; font-feature-settings: 'tnum'; line-height: 1; }
.stat-value.k { color: var(--key-current); }
.stat-value.b { color: var(--bpm); }
.stat-value.m { color: var(--match); }
.stat-sub { font-size: 10px; color: var(--text-dim); margin-top: 4px; font-family: 'JetBrains Mono', monospace; }

.tags-row { display: flex; flex-wrap: wrap; gap: 6px; }
.tag { padding: 4px 10px; border-radius: 4px; font-size: 11px; font-family: 'JetBrains Mono', monospace; letter-spacing: 0.04em; }
.tag-key   { background: var(--key-current); color: #fff; font-weight: 700; }
.tag-genre { background: rgba(90, 138, 229, 0.13); color: #8AA8D8; border: 1px solid rgba(90, 138, 229, 0.32); }
[data-theme="light"] .tag-genre { background: rgba(52, 90, 156, 0.10); color: #345A9C; border-color: rgba(52, 90, 156, 0.28); }
.tag-mood  { background: rgba(214, 41, 102, 0.13); color: #D88096; border: 1px solid rgba(214, 41, 102, 0.32); }
[data-theme="light"] .tag-mood { background: rgba(168, 51, 106, 0.10); color: #A8336A; border-color: rgba(168, 51, 106, 0.28); }

.wheel-container {
  width: 140px; height: 140px;
  position: relative; cursor: pointer;
  transition: transform .15s, width .3s ease, height .3s ease;
}
.wheel-container:hover { transform: scale(1.04); }
.wheel-container svg { width: 100%; height: 100%; display: block; }
.close-btn {
  position: absolute; top: 12px; right: 12px;
  width: 32px; height: 32px;
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 50%; color: var(--text-dim);
  font-size: 18px; cursor: pointer;
  display: none; align-items: center; justify-content: center;
  line-height: 1; z-index: 5;
  transition: color .12s, border-color .12s;
}
.close-btn:hover { color: var(--text); border-color: var(--text-dim); }
.hero.wheel-mode .close-btn,
.hero.cover-mode .close-btn { display: flex; }

.section-title {
  font-family: 'JetBrains Mono', monospace; font-size: 11px;
  letter-spacing: 0.25em; text-transform: uppercase; color: var(--text-dim);
  margin: 28px 0 12px;
}
.suggestions { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.sug {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px; padding: 10px;
  display: flex; flex-direction: column; gap: 8px;
  cursor: pointer;
  transition: border-color .12s, transform .12s;
}
.sug:hover { border-color: var(--text-dim); transform: translateY(-2px); }
.sug-cover { width: 100%; aspect-ratio: 1; border-radius: 4px; background: var(--surface-2); overflow: hidden; position: relative; }
.sug-cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.sug-cover-placeholder { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: 20px; opacity: 0.25; }
.sug-meta { display: flex; justify-content: space-between; align-items: center; }
.sug-key { font-family: 'JetBrains Mono', monospace; font-size: 12px; font-weight: 700; padding: 4px 8px; border-radius: 3px; color: #fff; letter-spacing: 0.04em; }
.sug-bpm { font-family: 'JetBrains Mono', monospace; font-size: 11px; color: var(--text-dim); }
.sug-title { font-size: 13px; font-weight: 500; line-height: 1.25; overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.sug-artist { font-family: 'JetBrains Mono', monospace; font-size: 10px; color: var(--text-dim); }
.sug-compat {
  font-family: 'JetBrains Mono', monospace; font-size: 9px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--text-dim);
  padding-top: 4px; border-top: 1px solid var(--border);
}