:root {
  --bg: #0b1020;
  --bg2: #0f1733;
  --card: rgba(255, 255, 255, 0.06);
  --card2: rgba(255, 255, 255, 0.08);
  --border: rgba(255, 255, 255, 0.14);
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.65);
  --muted2: rgba(255, 255, 255, 0.5);
  --accent: #7c3aed;
  --accent2: #22c55e;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Microsoft YaHei",
    sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 900px at 20% 10%, #1d2b66 0%, transparent 55%),
    radial-gradient(900px 700px at 90% 25%, #3b155f 0%, transparent 55%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg2) 100%);
}

.app {
  max-width: 1400px;
  margin: 0 auto;
  padding: 18px 16px 28px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.04));
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
  position: sticky;
  top: 12px;
  z-index: 20;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 260px;
}

.logo {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #7c3aed 0%, #06b6d4 100%);
  font-weight: 800;
  color: white;
}

.title {
  font-weight: 700;
  letter-spacing: 0.2px;
}

.subtitle {
  color: var(--muted);
  font-size: 12px;
  margin-top: 2px;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.layout {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 16px;
  margin-top: 16px;
  align-items: start;
}

.panel {
  border: 1px solid var(--border);
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.03));
  box-shadow: var(--shadow);
  padding: 14px;
  backdrop-filter: blur(14px);
}

.workspace {
  display: grid;
  gap: 16px;
}

.section {
  padding: 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  background: rgba(0, 0, 0, 0.12);
}

.section-title {
  font-size: 13px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 10px;
}

.details > summary.section-title {
  list-style: none;
  cursor: pointer;
  user-select: none;
}

.details > summary.section-title::-webkit-details-marker {
  display: none;
}

.details[open] {
  background: rgba(0, 0, 0, 0.16);
}

.field span {
  display: block;
  font-size: 12px;
  color: var(--muted);
}

input,
select,
textarea {
  width: 100%;
  margin-top: 6px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(8, 12, 24, 0.6);
  color: var(--text);
  outline: none;
  font-size: 14px;
}

textarea {
  resize: vertical;
  line-height: 1.4;
}

input::placeholder {
  color: rgba(255, 255, 255, 0.35);
}

input:focus,
select:focus,
textarea:focus {
  border-color: rgba(124, 58, 237, 0.55);
  box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.18);
}

.grid2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.grid3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
  margin-top: 12px;
}

.grid4 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 12px;
}

.row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  flex-wrap: wrap;
}

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

.small {
  font-size: 12px;
  color: var(--muted2);
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.05);
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.35);
}

.btn {
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 12px;
  cursor: pointer;
  font-size: 14px;
  transition: transform 120ms ease, background 120ms ease, border-color 120ms ease;
}

.btn:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.btn.primary {
  border-color: rgba(124, 58, 237, 0.5);
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.85) 0%, rgba(99, 102, 241, 0.85) 100%);
}

.canvas-card,
.output-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.03));
  box-shadow: var(--shadow);
  padding: 14px;
  backdrop-filter: blur(14px);
}

.canvas-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.stage {
  border: 1px dashed rgba(255, 255, 255, 0.25);
  border-radius: 14px;
  background: rgba(0, 0, 0, 0.2);
  padding: 12px;
}

.stage-inner {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 12px;
  overflow: hidden;
  user-select: none;
  touch-action: none;
  background: rgba(0, 0, 0, 0.35);
}

.bg {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.prod {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  transform-origin: center center;
  max-width: none;
  cursor: grab;
  filter: drop-shadow(0 18px 40px rgba(0, 0, 0, 0.35));
}

.prod.dragging {
  cursor: grabbing;
}

.controls {
  margin-top: 12px;
}

.final {
  width: 100%;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(0, 0, 0, 0.25);
  margin-top: 10px;
}

@media (max-width: 1100px) {
  .layout {
    grid-template-columns: 1fr;
  }
  .top-actions {
    flex-wrap: wrap;
    justify-content: flex-end;
  }
}