:root {
  --bg: #0f1115;
  --panel: #181b22;
  --panel-2: #1f232c;
  --border: #2a2f3a;
  --text: #e8eaf0;
  --muted: #8a92a3;
  --accent: #c9a876;
  --accent-2: #6b8e7f;
  --danger: #d96b6b;
  --radius: 12px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 22px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand { display: flex; align-items: center; gap: 12px; }
.brand h1 { margin: 0; font-size: 18px; font-weight: 600; letter-spacing: 0.2px; }
.logo-dot {
  width: 14px; height: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: 4px;
}

.actions { display: flex; gap: 8px; }

.btn {
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  cursor: pointer;
  font-size: 13px;
  transition: background 0.15s, border-color 0.15s;
}
.btn:hover { background: #252a35; }
.btn.primary {
  background: var(--accent);
  color: #1a1a1a;
  border-color: var(--accent);
  font-weight: 600;
}
.btn.primary:hover { background: #d4b78a; }
.btn.ghost { background: transparent; }
.btn.tiny { padding: 4px 8px; font-size: 11px; }

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  padding: 18px;
  max-width: 1800px;
  margin: 0 auto;
}

@media (max-width: 1100px) {
  .grid { grid-template-columns: 1fr; }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--panel-2);
}
.panel-head h2 { margin: 0; font-size: 15px; font-weight: 600; }

.hex-pill {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: #2a2f3a;
  color: var(--muted);
}

.canvas-wrap {
  background: #0a0b0f;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 12px;
}
canvas {
  width: 100%;
  height: auto;
  max-height: 560px;
  border-radius: 8px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.4);
  display: block;
}

.controls {
  padding: 12px 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

details {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
}
details summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 13px;
  padding: 4px 0;
  list-style: none;
  user-select: none;
}
details summary::-webkit-details-marker { display: none; }
details summary::before {
  content: "▸ ";
  display: inline-block;
  transition: transform 0.15s;
}
details[open] summary::before { content: "▾ "; }

.row {
  display: grid;
  grid-template-columns: 90px 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
}
.row label {
  font-size: 12px;
  color: var(--muted);
}
.row input[type="color"] {
  width: 50px;
  height: 32px;
  border: 1px solid var(--border);
  background: transparent;
  cursor: pointer;
  border-radius: 6px;
  padding: 2px;
}
.row input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}
.row select, .hex-input {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 6px 8px;
  border-radius: 6px;
  font-size: 13px;
  font-family: inherit;
}
.hex-input { font-family: ui-monospace, monospace; text-transform: uppercase; }
.row input[type="file"] {
  font-size: 11px;
  color: var(--muted);
}
.val {
  font-size: 12px;
  color: var(--muted);
  font-family: ui-monospace, monospace;
  min-width: 36px;
  text-align: right;
}

.palettes {
  max-width: 1800px;
  margin: 0 auto 24px;
  padding: 18px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-left: 18px;
  margin-right: 18px;
}
.palettes h3 { margin: 0 0 12px; font-size: 14px; font-weight: 600; }
.palettes h4 { margin: 14px 0 8px; font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.5px; }

.target-row {
  display: flex;
  gap: 14px;
  align-items: center;
  font-size: 12px;
  color: var(--muted);
  background: var(--panel-2);
  padding: 8px 12px;
  border-radius: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.target-row label { display: inline-flex; align-items: center; gap: 4px; cursor: pointer; }
.target-row input[type="radio"] { accent-color: var(--accent); }

.swatches {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(56px, 1fr));
  gap: 6px;
}
.swatch {
  aspect-ratio: 1;
  border-radius: 6px;
  cursor: pointer;
  border: 2px solid transparent;
  position: relative;
  transition: transform 0.1s, border-color 0.1s;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  overflow: hidden;
}
.swatch:hover {
  transform: scale(1.06);
  border-color: var(--accent);
}
.swatch .sw-hex {
  font-size: 9px;
  font-family: ui-monospace, monospace;
  background: rgba(0,0,0,0.55);
  color: white;
  width: 100%;
  text-align: center;
  padding: 2px 0;
  opacity: 0;
  transition: opacity 0.1s;
}
.swatch:hover .sw-hex { opacity: 1; }

footer {
  padding: 18px;
  text-align: center;
  color: var(--muted);
  font-size: 12px;
  border-top: 1px solid var(--border);
}