:root {
  --bg: #f2f2f4;
  --text: #1d1d1f;
  --text-dim: #6e6e73;
  --text-faint: #86868b;
  --glass: rgba(255, 255, 255, 0.55);
  --glass-strong: rgba(255, 255, 255, 0.78);
  --glass-border: rgba(255, 255, 255, 0.6);
  --glass-edge: rgba(255, 255, 255, 0.9);
  --glass-shadow:
    0 1px 0 rgba(255, 255, 255, 0.7) inset,
    0 -1px 0 rgba(0, 0, 0, 0.04) inset,
    0 12px 40px rgba(31, 38, 135, 0.14),
    0 2px 8px rgba(0, 0, 0, 0.04);
  --control-bg: rgba(255, 255, 255, 0.7);
  --control-border: rgba(0, 0, 0, 0.08);
  --control-hover: rgba(0, 0, 0, 0.04);
  --segment-bg: rgba(0, 0, 0, 0.05);
  --group-bg: rgba(255, 255, 255, 0.32);
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --accent-soft: rgba(0, 113, 227, 0.18);
  --shadow-elev: 0 12px 36px rgba(0, 113, 227, 0.42), 0 2px 8px rgba(0, 0, 0, 0.18);
  --shadow-elev-hover: 0 18px 44px rgba(0, 113, 227, 0.52), 0 4px 12px rgba(0, 0, 0, 0.22);
  --radius: 18px;
  --radius-sm: 12px;
  --radius-lg: 28px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a0a0c;
    --text: #f5f5f7;
    --text-dim: #a1a1a6;
    --text-faint: #6e6e73;
    --glass: rgba(28, 28, 32, 0.55);
    --glass-strong: rgba(40, 40, 46, 0.78);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-edge: rgba(255, 255, 255, 0.16);
    --glass-shadow:
      0 1px 0 rgba(255, 255, 255, 0.08) inset,
      0 -1px 0 rgba(0, 0, 0, 0.3) inset,
      0 14px 44px rgba(0, 0, 0, 0.5),
      0 2px 8px rgba(0, 0, 0, 0.3);
    --control-bg: rgba(255, 255, 255, 0.06);
    --control-border: rgba(255, 255, 255, 0.1);
    --control-hover: rgba(255, 255, 255, 0.08);
    --segment-bg: rgba(255, 255, 255, 0.07);
    --group-bg: rgba(255, 255, 255, 0.03);
    --accent: #0a84ff;
    --accent-hover: #2196ff;
    --accent-soft: rgba(10, 132, 255, 0.25);
    --shadow-elev: 0 12px 36px rgba(10, 132, 255, 0.4), 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-elev-hover: 0 18px 44px rgba(10, 132, 255, 0.55), 0 4px 12px rgba(0, 0, 0, 0.5);
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Inter", "Helvetica Neue", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  letter-spacing: -0.005em;
}

/* ── Background ───────────────────────────────────────────── */
.bg-mesh {
  position: fixed;
  inset: -25vw;
  z-index: -2;
  filter: blur(100px) saturate(150%);
  opacity: 0.85;
  background:
    radial-gradient(at 18% 25%, #ff6ec7 0, transparent 45%),
    radial-gradient(at 72% 18%, #a78bfa 0, transparent 50%),
    radial-gradient(at 82% 72%, #60a5fa 0, transparent 48%),
    radial-gradient(at 28% 82%, #34d399 0, transparent 50%),
    radial-gradient(at 52% 50%, #fbbf24 0, transparent 45%);
  animation: drift 24s ease-in-out infinite alternate;
  pointer-events: none;
}

@media (prefers-color-scheme: dark) {
  .bg-mesh { opacity: 0.55; }
}

@keyframes drift {
  0%   { transform: translate3d(0, 0, 0) rotate(0deg) scale(1); }
  50%  { transform: translate3d(2vw, -1vw, 0) rotate(4deg) scale(1.05); }
  100% { transform: translate3d(-1vw, 2vw, 0) rotate(-3deg) scale(0.98); }
}

.bg-grain {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.04;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

@media (prefers-reduced-motion: reduce) {
  .bg-mesh { animation: none; }
}

/* ── Glass primitive ──────────────────────────────────────── */
.glass {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  backdrop-filter: blur(40px) saturate(180%);
  -webkit-backdrop-filter: blur(40px) saturate(180%);
  box-shadow: var(--glass-shadow);
}

/* ── Header ───────────────────────────────────────────────── */
.app-header {
  position: sticky;
  top: 16px;
  margin: 16px auto;
  max-width: 1340px;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 18px 10px 14px;
  border-radius: 999px;
  margin-left: 24px;
  margin-right: 24px;
}

.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.brand-mark {
  width: 30px; height: 30px;
  border-radius: 9px;
  flex-shrink: 0;
  display: inline-flex;
  filter: drop-shadow(0 4px 12px rgba(167, 139, 250, 0.45));
}
.brand-mark svg {
  width: 100%; height: 100%;
  display: block;
  border-radius: inherit;
}
.brand-name { font-size: 16px; font-weight: 600; letter-spacing: -0.01em; }
.brand-tag {
  font-size: 12px;
  color: var(--text-faint);
  font-weight: 400;
  padding-left: 12px;
  border-left: 1px solid var(--control-border);
  line-height: 1.3;
}
.brand-tag a {
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px dashed var(--text-faint);
}
.brand-tag a:hover { color: var(--text); }
@media (max-width: 720px) { .brand-tag { display: none; } }

.ghost-link {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--text);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  transition: background 0.2s var(--ease);
}
.ghost-link:hover { background: var(--control-hover); }

/* ── Layout ───────────────────────────────────────────────── */
.layout {
  display: grid;
  grid-template-columns: minmax(340px, 460px) 1fr;
  gap: 24px;
  padding: 0 24px 32px;
  max-width: 1340px;
  margin: 24px auto 0;
}

@media (max-width: 960px) {
  .layout { grid-template-columns: 1fr; }
}

.controls {
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-height: calc(100vh - 160px);
  overflow-y: auto;
  overscroll-behavior: contain;
}

@media (max-width: 960px) {
  .controls { max-height: none; }
}

.controls::-webkit-scrollbar { width: 10px; }
.controls::-webkit-scrollbar-track { background: transparent; }
.controls::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.12);
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: padding-box;
}
@media (prefers-color-scheme: dark) {
  .controls::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.12); background-clip: padding-box; }
}

/* ── Fields ───────────────────────────────────────────────── */
.field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.field label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.field.inline { gap: 4px; }

.hint {
  color: var(--text-dim);
  font-weight: 500;
  font-feature-settings: "tnum";
  font-size: 11px;
  text-transform: none;
  letter-spacing: 0;
}
.hint-line {
  margin: 0;
  font-size: 12px;
  color: var(--text-dim);
}
.hint-line.subtle { color: var(--text-faint); }
.hint-line code {
  background: var(--control-bg);
  padding: 1px 6px;
  border-radius: 5px;
  font-size: 11px;
  border: 1px solid var(--control-border);
}

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

/* ── Inputs ───────────────────────────────────────────────── */
input[type="text"],
select {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--control-border);
  background: var(--control-bg);
  color: var(--text);
  font: inherit;
  font-size: 14px;
  transition: border-color 0.15s var(--ease), box-shadow 0.15s var(--ease), background 0.15s var(--ease);
  -webkit-appearance: none;
  appearance: none;
}

select {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'><path d='M3 4.5 6 8l3-3.5' fill='none' stroke='%236e6e73' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/></svg>");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

input[type="text"]:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

input[type="text"]::placeholder { color: var(--text-faint); }

/* Range slider */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: var(--segment-bg);
  border-radius: 999px;
  outline: none;
  cursor: pointer;
  margin: 8px 0;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow:
    0 2px 6px rgba(0, 0, 0, 0.18),
    0 1px 0 rgba(255, 255, 255, 0.8) inset;
  cursor: pointer;
  transition: transform 0.12s var(--ease);
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.12); }
input[type="range"]::-webkit-slider-thumb:active { transform: scale(1.05); }
input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.18);
  cursor: pointer;
}

/* Color picker */
.color {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
}
.color input[type="color"] {
  width: 38px;
  height: 38px;
  border: 1px solid var(--control-border);
  border-radius: 11px;
  padding: 3px;
  background: var(--control-bg);
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}
.color input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; border-radius: 8px; overflow: hidden; }
.color input[type="color"]::-webkit-color-swatch { border: none; border-radius: 8px; }

/* Toggles */
.toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  user-select: none;
  color: var(--text);
}
.toggle input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 38px;
  height: 22px;
  background: rgba(120, 120, 128, 0.32);
  border-radius: 999px;
  position: relative;
  cursor: pointer;
  transition: background 0.2s var(--ease);
  flex-shrink: 0;
}
.toggle input[type="checkbox"]::after {
  content: "";
  position: absolute;
  top: 2px; left: 2px;
  width: 18px; height: 18px;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2), 0 0 0 0.5px rgba(0, 0, 0, 0.04);
  transition: left 0.22s var(--ease);
}
.toggle input[type="checkbox"]:checked { background: var(--accent); }
.toggle input[type="checkbox"]:checked::after { left: 18px; }
.toggle input[type="checkbox"]:focus-visible { box-shadow: 0 0 0 4px var(--accent-soft); }

/* Fieldset / group */
fieldset.group {
  border: 1px solid var(--glass-border);
  margin: 0;
  padding: 14px 14px 14px;
  border-radius: var(--radius-sm);
  background: var(--group-bg);
  display: flex;
  flex-direction: column;
  gap: 12px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}
fieldset.group legend {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  padding: 0 8px;
  background: var(--glass-strong);
  border-radius: 6px;
  border: 1px solid var(--glass-border);
}

.color-row { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.gradient-controls {
  display: grid;
  grid-template-columns: auto 1fr 1fr;
  gap: 10px 12px;
  align-items: end;
  padding-top: 4px;
  border-top: 1px dashed var(--control-border);
  padding-top: 12px;
}
.gradient-controls .color { grid-column: 1; grid-row: 1; }

@media (max-width: 540px) {
  .gradient-controls { grid-template-columns: 1fr 1fr; }
  .gradient-controls .color { grid-column: 1 / -1; }
}

/* Segmented control */
.segmented {
  display: inline-flex;
  background: var(--segment-bg);
  border-radius: 12px;
  padding: 3px;
  width: 100%;
  border: 1px solid var(--control-border);
}
.segmented button {
  flex: 1;
  border: none;
  background: transparent;
  padding: 9px 14px;
  border-radius: 9px;
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), box-shadow 0.2s var(--ease);
  letter-spacing: -0.01em;
}
.segmented button:hover { color: var(--text); }
.segmented button[aria-selected="true"] {
  background: var(--glass-strong);
  color: var(--text);
  box-shadow:
    0 1px 3px rgba(0, 0, 0, 0.12),
    0 0 0 0.5px rgba(0, 0, 0, 0.04);
}

[data-engine-mode="simple"] .styled-only { display: none !important; }
[data-engine-mode="styled"] [data-engine-only="simple"] { display: none; }
[data-engine-mode="simple"] [data-engine-only="styled"] { display: none; }

/* Logo row */
.logo-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.file-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--control-bg);
  border: 1px solid var(--control-border);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s var(--ease);
}
.file-btn:hover { background: var(--control-hover); }
.file-btn input[type="file"] {
  position: absolute;
  width: 1px; height: 1px;
  opacity: 0;
  pointer-events: none;
}

/* Buttons */
.ghost-btn {
  background: transparent;
  border: 1px solid var(--control-border);
  color: var(--text);
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s var(--ease), border-color 0.15s var(--ease);
}
.ghost-btn:hover { background: var(--control-hover); border-color: var(--text-faint); }
.ghost-btn:active { transform: scale(0.98); }

.actions { display: flex; justify-content: flex-end; padding-top: 4px; }

/* ── Preview ──────────────────────────────────────────────── */
.preview-pane {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
  padding-top: 8px;
}

.preview-card {
  position: relative;
  width: 100%;
  max-width: 580px;
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  border-radius: var(--radius-lg);
}
.preview-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(255,255,255,0.3), transparent 40%);
  pointer-events: none;
  mix-blend-mode: overlay;
}

.preview {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  min-height: 0;
}
.preview > * {
  max-width: 100% !important;
  max-height: 100% !important;
  width: auto !important;
  height: auto !important;
  border-radius: 10px;
  filter: drop-shadow(0 6px 20px rgba(0, 0, 0, 0.1));
  transition: transform 0.3s var(--ease);
}
.preview canvas, .preview svg, .preview img { display: block; }

/* Floating download button */
.floating-btn {
  position: absolute;
  bottom: -22px;
  left: 50%;
  transform: translateX(-50%);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border: none;
  border-radius: 999px;
  background: var(--accent);
  color: white;
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
  cursor: pointer;
  box-shadow: var(--shadow-elev);
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease), background 0.15s var(--ease);
  white-space: nowrap;
}
.floating-btn::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.2), transparent 60%);
  pointer-events: none;
}
.floating-btn:hover {
  background: var(--accent-hover);
  transform: translateX(-50%) translateY(-3px);
  box-shadow: var(--shadow-elev-hover);
}
.floating-btn:active { transform: translateX(-50%) translateY(-1px); }
.floating-btn:focus-visible { outline: 3px solid var(--accent-soft); outline-offset: 3px; }