:root{
  --bg: #121118;
  --nav-bg: #17161f;
  --border: #2a2833;
  --text: #eae7e2;
  --text-dim: #8b879c;
  --accent: #c9a227;
  --danger: #c9524a;
  --ok: #6fae7c;
}

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

body{
  background: var(--bg);
  color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  min-height:100vh;
}

nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding: 16px 24px;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--border);
}

nav a{ color: var(--text-dim); text-decoration:none; font-size: 13px; }
nav a:hover{ color: var(--accent); }

nav .brand{
  font-family: 'Space Grotesk', sans-serif;
  font-weight:600;
  font-size: 14px;
  color: var(--text-dim);
}

main{
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}

h1{
  font-family: 'Space Grotesk', sans-serif;
  font-weight:700;
  font-size: clamp(26px, 5vw, 38px);
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.subtitle{
  color: var(--text-dim);
  font-size: 12.5px;
  margin-bottom: 20px;
  line-height:1.6;
}

.data-status{
  font-size: 11px;
  color: var(--text-dim);
  margin-bottom: 18px;
  display:flex;
  align-items:center;
  gap: 8px;
}

.status-dot{ width:6px; height:6px; border-radius:50%; background: var(--text-dim); flex-shrink:0; }
.status-dot.ok{ background: var(--ok); }
.status-dot.err{ background: var(--danger); }

.search-input{
  width:100%;
  background: var(--nav-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
  color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  margin-bottom: 24px;
}
.search-input:focus{ outline:none; border-color: var(--accent); }

.song-grid{
  display:grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 14px;
}

.song-card{
  cursor:pointer;
  text-align:center;
}

.song-jacket{
  width:100%;
  aspect-ratio: 1;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--nav-bg);
  object-fit: cover;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.song-card:hover .song-jacket{
  border-color: var(--accent);
  transform: translateY(-2px);
}

.song-title{
  font-size: 10.5px;
  color: var(--text-dim);
  margin-top: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card{
  background: var(--nav-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.panel-overlay{
  display:none;
  position: fixed;
  inset:0;
  background: rgba(0,0,0,0.6);
  align-items:center;
  justify-content:center;
  padding: 20px;
  z-index: 50;
}

.panel-overlay.open{ display:flex; }

.panel{
  width: 100%;
  max-width: 560px;
  max-height: 84vh;
  overflow-y:auto;
  padding: 20px;
  position: relative;
}

.panel-header{
  display:flex;
  align-items:center;
  gap: 14px;
  margin-bottom: 20px;
}

.panel-jacket{
  width: 64px;
  height: 64px;
  border-radius: 8px;
  object-fit: cover;
  border: 1px solid var(--border);
  flex-shrink:0;
}

.panel-header h2{
  font-family: 'Space Grotesk', sans-serif;
  font-size: 17px;
  font-weight:600;
}

.panel-sub{
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 4px;
}

.close-btn{
  position:absolute;
  top: 14px;
  right: 14px;
  background:none;
  border:none;
  color: var(--text-dim);
  font-size: 22px;
  cursor:pointer;
  line-height:1;
}
.close-btn:hover{ color: var(--danger); }

.meta-list{
  display:flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 20px;
}

.meta-row{
  display:flex;
  justify-content: space-between;
  gap: 16px;
  padding: 9px 0;
  border-top: 1px solid var(--border);
  font-size: 12.5px;
}

.meta-row:first-child{ border-top:none; }

.meta-label{
  color: var(--text-dim);
  text-transform: uppercase;
  font-size: 10.5px;
  letter-spacing: 0.05em;
  flex-shrink:0;
}

.meta-value{
  text-align: right;
}

.btn-download-toggle{
  width:100%;
  background: var(--accent);
  color: #17161f;
  border: none;
  border-radius: 7px;
  padding: 11px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  font-weight: 600;
  cursor:pointer;
  transition: opacity 0.15s ease;
}
.btn-download-toggle:hover{ opacity: 0.9; }

.diff-row{
  display:flex;
  align-items:center;
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

.diff-tag{
  font-size: 10px;
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid var(--border);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  width: 70px;
  text-align:center;
  flex-shrink:0;
}

.diff-level{
  font-size: 12.5px;
  color: var(--text-dim);
  width: 30px;
  flex-shrink:0;
}

.diff-actions{
  display:flex;
  gap: 8px;
  margin-left: auto;
  flex-wrap: wrap;
}

.diff-actions a, .diff-actions button{
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  border-radius: 5px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  padding: 6px 10px;
  cursor:pointer;
  text-decoration:none;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.diff-actions a:hover, .diff-actions button:hover{
  border-color: var(--accent);
  color: var(--accent);
}

.diff-actions button.primary{
  background: var(--accent);
  color: #17161f;
  border-color: var(--accent);
  font-weight:600;
}
.diff-actions button.primary:hover{ opacity:0.9; color:#17161f; }

.empty-state{
  color: var(--text-dim);
  font-size: 12.5px;
  text-align:center;
  padding: 30px 0;
  grid-column: 1 / -1;
}

.hint{
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 26px;
  line-height: 1.6;
}