:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --code: #ffffff;
  --line: rgba(0, 0, 0, .12);
  --text: #111827;
  --sub: #856259;
  --topbar: #ffffff;
  --primary: #fa9403;
  --muted: #667085;
}

html[data-theme="dark"] {
  --bg: #000;
  --surface: #000;
  --code: #444;
  --line: rgba(255, 255, 255, .16);
  --text: #e5e7eb;
  --sub: #d9b8a0;
  --topbar: #000;
  --muted: #9ca3af;
}

* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; color: var(--text); background: var(--bg); }

.dt-topbar {
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  background: var(--topbar);
  border-bottom: 1px solid var(--line);
}
.dt-brand { display: flex; align-items: center; gap: 12px; }
.dt-logotop { width: 500px; max-width: 100%; height: auto; display: block; }
.dt-title { color: var(--sub); font-weight: 700; }

.dt-secondary-btn,
button {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  border-radius: 10px;
  padding: 9px 12px;
  font-weight: 700;
  cursor: pointer;
}
.dt-secondary-btn:hover,
button:hover { border-color: var(--primary); color: var(--primary); }

.dt-main { width: 100%; margin: 18px 0; padding: 0 14px 40px; }

.bg-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 470px;
  gap: 16px;
  align-items: start;
}

.bg-stage,
.bg-panel {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px;
  background: var(--surface);
}

.bg-panel h1,
.bg-panel h2,
.bg-presets-box h2 {
  margin: 0 0 10px;
  color: var(--sub);
  font-weight: 600;
}

.bg-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin: 8px 0 14px;
}

.bg-tab-btn {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
}

.bg-tab-btn.is-active {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--primary) 45%, transparent);
}

.bg-tab-panel[hidden] { display: none !important; }

.bg-preview-wrap {
  position: relative;
  min-height: 580px;
  border-radius: 12px;
  overflow: hidden;
  display: grid;
  place-items: center;
}

.bg-preview-grid {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to right, rgba(127, 127, 127, .12) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(127, 127, 127, .12) 1px, transparent 1px);
  background-size: 24px 24px;
}

.bg-preview-btn {
  position: relative;
  z-index: 1;
  line-height: 1;
  cursor: pointer;
}

.bg-row { display: grid; gap: 10px; margin-bottom: 12px; }
.bg-row.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.bg-row.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.bg-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-bottom: 12px; }

label { display: block; font-size: 12px; font-weight: 700; }
input[type="range"] { width: 100%; margin-top: 6px; }
input[type="text"],
select,
textarea,
input[type="color"] {
  width: 100%;
  margin-top: 6px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 9px 10px;
  background: var(--surface);
  color: var(--text);
  font-size: 13px;
}

textarea {
  min-height: 120px;
  resize: vertical;
  background: var(--code);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

input[type="color"] {
  height: 38px;
  padding: 2px;
}

.bg-mini { display: inline-block; margin-top: 4px; color: var(--muted); font-size: 12px; }
.bg-check { display: flex; gap: 8px; align-items: center; margin: 8px 0 12px; }
.bg-check.compact { margin: 0; }
.bg-check input { margin: 0; }
.bg-actions { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 12px; align-items: center; }
.bg-feedback { min-height: 20px; color: #22c55e; font-weight: 700; margin: 8px 0 0; }

.bg-radius-readout { margin-bottom: 14px; }
.bg-radius-pill {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 10px;
  font-size: 12px;
  font-weight: 700;
  color: var(--text);
  background: color-mix(in srgb, var(--surface) 90%, transparent);
}
.bg-radius-pill strong { color: var(--sub); }

.bg-preset-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}
.bg-preset {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  padding: 10px 8px;
  text-align: left;
}
.bg-preset.is-active {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--primary) 45%, transparent);
}
.bg-preset .swatch {
  display: block ruby;
  min-height: 68px;
  border-radius: 8px;
  margin-bottom: 8px;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  border: 1px dashed var(--line);
  padding: 10px;
  text-align: center;
  padding-top: 25px;
}
.bg-preset .sample {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 44px;
  cursor: pointer;
  line-height: 1.1;
  margin: 0 auto;
}
.bg-preset .name { font-size: 11px; font-weight: 700; }
.is-hidden { display: none !important; }

@keyframes bgPulse {
  25% { transform: scale(1.06); }
  75% { transform: scale(0.96); }
}

@keyframes bgFloat {
  50% { transform: translateY(-8px); }
}

@keyframes bgSink {
  50% { transform: translateY(8px); }
}

@keyframes bgBuzz {
  16.65% { transform: translateX(3px) rotate(2deg); }
  33.3% { transform: translateX(-3px) rotate(-2deg); }
  49.95% { transform: translateX(2px) rotate(1deg); }
  66.6% { transform: translateX(-2px) rotate(-1deg); }
  83.25% { transform: translateX(1px) rotate(0deg); }
  100% { transform: translateX(0); }
}

@keyframes bgWobbleHorizontal {
  16.65% { transform: translateX(8px); }
  33.3% { transform: translateX(-6px); }
  49.95% { transform: translateX(4px); }
  66.6% { transform: translateX(-2px); }
  83.25% { transform: translateX(1px); }
  100% { transform: translateX(0); }
}

@keyframes bgPulseGrow {
  25% { transform: scale(1.08); }
  75% { transform: scale(1); }
}

@keyframes bgPulseShrink {
  25% { transform: scale(0.92); }
  75% { transform: scale(1); }
}

@keyframes bgPush {
  50% { transform: scale(0.85); }
  100% { transform: scale(1); }
}

@keyframes bgPop {
  50% { transform: scale(1.15); }
  100% { transform: scale(1); }
}

@keyframes bgBob {
  0% { transform: translateY(-8px); }
  50% { transform: translateY(-4px); }
  100% { transform: translateY(-8px); }
}

@keyframes bgHang {
  0% { transform: translateY(8px); }
  50% { transform: translateY(4px); }
  100% { transform: translateY(8px); }
}

@keyframes bgWobbleVertical {
  16.65% { transform: translateY(8px); }
  33.3% { transform: translateY(-6px); }
  49.95% { transform: translateY(4px); }
  66.6% { transform: translateY(-2px); }
  83.25% { transform: translateY(1px); }
  100% { transform: translateY(0); }
}

@keyframes bgWobbleToBottomRight {
  16.65% { transform: translate(8px, 8px); }
  33.3% { transform: translate(-6px, -6px); }
  49.95% { transform: translate(4px, 4px); }
  66.6% { transform: translate(-2px, -2px); }
  83.25% { transform: translate(1px, 1px); }
  100% { transform: translate(0, 0); }
}

@keyframes bgWobbleToTopRight {
  16.65% { transform: translate(8px, -8px); }
  33.3% { transform: translate(-6px, 6px); }
  49.95% { transform: translate(4px, -4px); }
  66.6% { transform: translate(-2px, 2px); }
  83.25% { transform: translate(1px, -1px); }
  100% { transform: translate(0, 0); }
}

@keyframes bgWobbleTop {
  16.65% { transform: skew(-12deg); }
  33.3% { transform: skew(10deg); }
  49.95% { transform: skew(-6deg); }
  66.6% { transform: skew(4deg); }
  83.25% { transform: skew(-2deg); }
  100% { transform: skew(0deg); }
}

@keyframes bgWobbleBottom {
  16.65% { transform: skew(12deg); }
  33.3% { transform: skew(-10deg); }
  49.95% { transform: skew(6deg); }
  66.6% { transform: skew(-4deg); }
  83.25% { transform: skew(2deg); }
  100% { transform: skew(0deg); }
}

@keyframes bgBuzzOut {
  10% { transform: translateX(3px) rotate(2deg); }
  20% { transform: translateX(-3px) rotate(-2deg); }
  30% { transform: translateX(3px) rotate(2deg); }
  40% { transform: translateX(-3px) rotate(-2deg); }
  50% { transform: translateX(2px) rotate(1deg); }
  60% { transform: translateX(-2px) rotate(-1deg); }
  70% { transform: translateX(2px) rotate(1deg); }
  80% { transform: translateX(-2px) rotate(-1deg); }
  90% { transform: translateX(1px) rotate(0deg); }
  100% { transform: translateX(0); }
}

@media (max-width: 1320px) {
  .bg-shell { grid-template-columns: 1fr; }
  .bg-preset-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  .bg-row.two,
  .bg-row.three,
  .bg-grid,
  .bg-preset-list { grid-template-columns: 1fr; }
}