:root {
  --bg: #0b0d12;
  --bg-2: #12151d;
  --bg-3: #191d27;
  --border: #242938;
  --text: #e7e9ef;
  --text-dim: #9aa0b0;
  --text-mute: #6b7184;
  --accent: #ff6b35;
  --accent-2: #ffb36b;
  --accent-3: #65e0c0;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  background: radial-gradient(1200px 800px at 20% -20%, #1a1325 0%, var(--bg) 60%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", sans-serif;
  font-size: 14px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 32px;
  border-bottom: 1px solid var(--border);
  background: rgba(11, 13, 18, 0.85);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand { display: flex; align-items: center; gap: 12px; }
.logo { color: var(--accent); font-size: 22px; }
.name {
  font-family: var(--mono);
  font-weight: 700;
  letter-spacing: 0.2em;
  font-size: 14px;
}
.tag {
  color: var(--text-mute);
  font-size: 12px;
  font-style: italic;
  margin-left: 12px;
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px;
}

button {
  font-family: inherit;
  font-size: 13px;
  padding: 10px 18px;
  border-radius: 8px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
}
.primary {
  background: var(--accent);
  color: #141218;
  border-color: var(--accent);
  font-weight: 600;
}
.primary:hover { background: var(--accent-2); }
.ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.ghost:hover { border-color: var(--accent); color: var(--accent); }

.dropzone {
  border: 2px dashed var(--border);
  border-radius: 16px;
  padding: 72px 32px;
  text-align: center;
  transition: all 0.2s ease;
  background: var(--bg-2);
}
.dropzone.drag-over {
  border-color: var(--accent);
  background: rgba(255, 107, 53, 0.05);
  transform: scale(1.01);
}
.drop-title {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 10px;
}
.drop-sub {
  color: var(--text-dim);
  margin-bottom: 24px;
  font-size: 13px;
}

.progress {
  margin-top: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 40px;
}
.spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.progress-text { color: var(--text-dim); font-family: var(--mono); }

.results { margin-top: 32px; }

.results-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 20px;
  margin-bottom: 28px;
}

.card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px 24px;
}
.card h2 {
  margin: 0 0 16px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--text-mute);
  text-transform: uppercase;
  font-family: var(--mono);
}

.dna-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px 20px;
}
.dna-item { display: flex; flex-direction: column; }
.dna-label {
  font-size: 11px;
  color: var(--text-mute);
  font-family: var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.dna-value {
  margin-top: 4px;
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
}
.dna-value.accent { color: var(--accent-2); }
.dna-value.cool { color: var(--accent-3); }

.arrangement {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}
.arrangement .dna-label { margin-bottom: 10px; }
.arrangement-flow {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.arrangement-flow .seg {
  background: var(--bg-3);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
}
.arrangement-flow .seg.drop { border-color: var(--accent); color: var(--accent-2); }
.arrangement-flow .seg.build { border-color: var(--accent-3); color: var(--accent-3); }

.style dl {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.style dt {
  font-size: 11px;
  color: var(--text-mute);
  font-family: var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 3px;
}
.style dd {
  margin: 0;
  font-size: 15px;
  color: var(--text);
  font-weight: 500;
}

.tabs {
  display: flex;
  gap: 2px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.tab {
  background: transparent;
  border: none;
  color: var(--text-dim);
  padding: 12px 18px;
  font-size: 12px;
  font-family: var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  cursor: pointer;
}
.tab:hover { color: var(--text); }
.tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.panel { display: none; }
.panel.active { display: block; }

.item-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 12px;
}
.item {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.item-name {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text);
  word-break: break-all;
}
.item-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}
.tag-chip {
  font-size: 10px;
  padding: 2px 8px;
  background: var(--bg-3);
  border-radius: 999px;
  color: var(--text-dim);
  font-family: var(--mono);
}
.item-meta {
  font-size: 11px;
  color: var(--text-mute);
  font-family: var(--mono);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.item-source {
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--bg-3);
  color: var(--accent-3);
  font-family: var(--mono);
}
.item-source.seed { color: var(--text-mute); }

.midi-download, .item-preview {
  font-size: 11px;
  padding: 5px 10px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  border-radius: 6px;
  text-decoration: none;
  font-family: var(--mono);
  cursor: pointer;
}
.midi-download:hover, .item-preview:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.chain-group { margin-bottom: 22px; }
.chain-group h3 {
  font-size: 11px;
  color: var(--text-mute);
  font-family: var(--mono);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin: 0 0 10px;
}
.chain-flow {
  display: flex;
  gap: 4px;
  align-items: center;
  flex-wrap: wrap;
}
.chain-step {
  background: var(--bg-2);
  border: 1px solid var(--border);
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 13px;
  color: var(--text);
}
.chain-arrow { color: var(--text-mute); font-size: 12px; }

.preset-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 16px;
}
.preset-card h3 {
  margin: 0 0 14px;
  color: var(--accent-2);
  font-size: 16px;
}
.preset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 10px 24px;
}
.preset-field {
  font-size: 12px;
  display: flex;
  flex-direction: column;
}
.preset-field .k {
  color: var(--text-mute);
  font-family: var(--mono);
  text-transform: uppercase;
  font-size: 10px;
  letter-spacing: 0.1em;
}
.preset-field .v { color: var(--text); margin-top: 2px; }
.preset-notes {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 12px;
  font-style: italic;
}
.preset-fx {
  margin-top: 12px;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.preset-fx .tag-chip { background: rgba(255, 107, 53, 0.1); color: var(--accent-2); }

.arrangement-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.arrangement-list li {
  background: var(--bg-2);
  border: 1px solid var(--border);
  padding: 12px 18px;
  border-radius: 8px;
  font-family: var(--mono);
  display: flex;
  align-items: center;
  gap: 14px;
}
.arrangement-list li .idx {
  color: var(--text-mute);
  font-size: 11px;
  min-width: 30px;
}

.hidden { display: none !important; }

.empty-msg {
  color: var(--text-mute);
  font-style: italic;
  padding: 24px 0;
  text-align: center;
  font-size: 13px;
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
.modal-inner {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
  width: 520px;
  max-width: 92vw;
}
.modal-inner h2 { margin: 0 0 10px; font-size: 18px; }
.modal-inner p { color: var(--text-dim); margin: 0 0 16px; font-size: 13px; }
.modal-inner textarea {
  width: 100%;
  min-height: 120px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--mono);
  font-size: 12px;
  padding: 12px;
  border-radius: 8px;
  resize: vertical;
}
.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 16px;
}
.scan-status {
  margin-top: 14px;
  color: var(--accent-3);
  font-family: var(--mono);
  font-size: 12px;
}