:root {
  --bg: #0f1220;
  --bg2: #1a2036;
  --panel: #121726;
  --card: #171d31;
  --ink: #eef2ff;
  --muted: #a7b0d6;
  --accent: #ffb84d;
  --accent2: #4dd6ff;
  --danger: #ff5d6c;
  --ok: #7dffb3;
  --shadow: 0 12px 30px rgba(0,0,0,0.35);
}

* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0; height: 100%;
  font-family: "Segoe UI Variable", "Bahnschrift", "Trebuchet MS", sans-serif;
  color: var(--ink);
  background: radial-gradient(1200px 800px at 20% 10%, #25305a 0%, var(--bg) 45%) fixed,
              linear-gradient(180deg, var(--bg), var(--bg2));
}

.app {
  display: grid;
  grid-template-columns: 380px 1fr;
  min-height: 100vh;
}

.panel {
  padding: 20px;
  background: linear-gradient(180deg, rgba(18,23,38,0.95), rgba(16,20,34,0.98));
  box-shadow: var(--shadow);
  border-right: 1px solid rgba(255,255,255,0.05);
  overflow-y: auto;
}

.stage {
  position: relative;
  padding: 16px;
}

#canvas {
  width: 100%;
  height: calc(100vh - 32px);
  background: radial-gradient(700px 500px at 70% 20%, rgba(77,214,255,0.08), transparent 60%),
              radial-gradient(600px 400px at 30% 80%, rgba(255,184,77,0.08), transparent 60%),
              linear-gradient(180deg, #0b0f1d, #0d1324);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.brand { margin-bottom: 14px; }
.title { font-size: 26px; font-weight: 700; letter-spacing: 0.3px; }
.subtitle { color: var(--muted); font-size: 13px; }

.card {
  background: var(--card);
  padding: 14px;
  margin: 12px 0;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.06);
  box-shadow: 0 6px 18px rgba(0,0,0,0.25);
}

.card h2 {
  margin: 0 0 10px 0;
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--muted);
}

.label { font-size: 12px; color: var(--muted); }

.row {
  display: flex;
  gap: 8px;
  align-items: center;
  margin: 8px 0;
  flex-wrap: wrap;
}

input[type="text"], select {
  flex: 1;
  min-width: 140px;
  background: #0f1529;
  color: var(--ink);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  padding: 9px 10px;
  outline: none;
}

input[type="range"] { width: 100%; }
.row #timeline { flex: 1; min-width: 140px; }

button {
  background: #11182d;
  color: var(--ink);
  border: 1px solid rgba(255,255,255,0.08);
  padding: 9px 12px;
  border-radius: 10px;
  cursor: pointer;
  transition: transform 120ms ease, background 120ms ease;
}

button:hover { transform: translateY(-1px); background: #19203a; }
button.primary { background: linear-gradient(120deg, #ffc86b, #ff9f2f); color: #1b1203; font-weight: 700; }
button.danger { background: linear-gradient(120deg, #ff7a85, #ff4b5e); color: #1a0a0d; font-weight: 700; }

.tab { flex: 1; }
.tab.active { background: linear-gradient(120deg, #62e3ff, #4db8ff); color: #08111f; font-weight: 700; }

.output {
  min-height: 70px;
  padding: 10px;
  background: #0d1326;
  border-radius: 10px;
  border: 1px dashed rgba(255,255,255,0.15);
  font-family: "Cascadia Mono", "Consolas", monospace;
  font-size: 13px;
  color: var(--ok);
}

.legend { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; font-size: 12px; color: var(--muted); }
.swatch { display: inline-block; width: 12px; height: 12px; border-radius: 3px; margin-right: 6px; }
.swatch.active { background: var(--accent2); }
.swatch.visited { background: var(--ok); }
.swatch.compare { background: var(--accent); }
.swatch.insert { background: #f06bff; }

.stats { font-size: 13px; color: var(--muted); display: grid; gap: 4px; }
.hint { color: var(--muted); font-size: 12px; }

.hint-overlay {
  position: absolute;
  right: 24px;
  top: 22px;
  background: rgba(10,14,26,0.75);
  color: var(--muted);
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 12px;
  border: 1px solid rgba(255,255,255,0.08);
  pointer-events: none;
}

@media (max-width: 980px) {
  .app { grid-template-columns: 1fr; }
  #canvas { height: 60vh; }
  .panel { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.05); }
}