:root {
  --bg: #f6f8fb;
  --panel: #ffffff;
  --panel2: #f3f5f8;
  --text: rgba(16, 24, 40, 0.92);
  --muted: rgba(16, 24, 40, 0.62);
  --border: rgba(16, 24, 40, 0.14);
  --accent: rgba(80, 130, 255, 0.9);
  --danger: rgba(230, 80, 80, 0.95);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  background: radial-gradient(900px 700px at 15% 0%, rgba(80, 130, 255, 0.10), transparent),
    radial-gradient(900px 700px at 95% 10%, rgba(80, 130, 255, 0.06), transparent),
    var(--bg);
  color: var(--text);
}

.header {
  padding: 18px 18px 10px;
}

.title {
  font-size: 18px;
  font-weight: 700;
}

.subtitle {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

.topbar {
  height: 3px;
  background: rgba(16, 24, 40, 0.08);
}

.topbarInner {
  height: 3px;
  width: 32%;
  background: var(--accent);
  animation: slide 1.1s ease-in-out infinite;
}

@keyframes slide {
  0% {
    transform: translateX(-40%);
  }
  50% {
    transform: translateX(220%);
  }
  100% {
    transform: translateX(-40%);
  }
}

.layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 14px;
  padding: 14px 18px 18px;
}

.panel {
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 14px;
  padding: 14px;
}

.group {
  padding: 10px 0;
  border-bottom: 1px solid rgba(16, 24, 40, 0.08);
}

.group:last-child {
  border-bottom: 0;
}

.label {
  font-weight: 600;
  font-size: 13px;
  margin-bottom: 8px;
}

.hint {
  margin-top: 6px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.35;
}

.row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.labelInline {
  font-size: 12px;
  color: var(--muted);
  display: inline-flex;
  align-items: center;
}

input[type="number"] {
  padding: 9px 10px;
  border-radius: 12px;
  border: 1px solid rgba(16, 24, 40, 0.14);
  background: #ffffff;
  color: var(--text);
  outline: none;
  width: 90px;
}

.check {
  font-size: 13px;
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.toggles {
  display: grid;
  gap: 8px;
}

.toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 10px;
  border: 1px solid rgba(16, 24, 40, 0.12);
  border-radius: 12px;
  background: var(--panel2);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 13px;
}

.swatch {
  width: 14px;
  height: 14px;
  border-radius: 4px;
  border: 1px solid rgba(0, 0, 0, 0.25);
}

.hover {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.4;
}

.btn {
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(16, 24, 40, 0.14);
  background: #ffffff;
  color: var(--text);
  cursor: pointer;
}

.btn:hover {
  background: rgba(80, 130, 255, 0.08);
}

.btn.danger:hover {
  background: rgba(230, 80, 80, 0.08);
}

.canvasWrap {
  position: relative;
  border: 1px solid var(--border);
  background: #ffffff;
  border-radius: 14px;
  overflow: hidden;
  align-self: start;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
}

.canvasWrap.editing {
  cursor: move;
}

.tooltip {
  position: absolute;
  pointer-events: none;
  padding: 8px 10px;
  border-radius: 10px;
  background: rgba(245, 245, 245, 0.95);
  color: #111;
  border: 1px solid rgba(0, 0, 0, 0.15);
  font-size: 12px;
  white-space: nowrap;
  transform: translate(10px, 10px);
}

@media (max-width: 980px) {
  .layout {
    grid-template-columns: 1fr;
  }
  .canvasWrap {
    min-height: 60vh;
  }
}