*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #0b0b12;
  --bg-card: #14141f;
  --bg-elevated: #1c1c2e;
  --bg-hover: #25253d;
  --border: #2a2a45;
  --border-accent: #3a3a5c;
  --text: #eeeef4;
  --text-secondary: #9898b8;
  --text-muted: #6a6a88;
  --accent: #2b6bff;
  --accent-hover: #6a4ae6;
  --accent-glow: rgba(124,92,252,.25);
  --accent-subtle: rgba(124,92,252,.12);
  --success: #34d399;
  --warning: #fbbf24;
  --danger: #f87171;
  --info: #60a5fa;
  --radius: 14px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --shadow: 0 8px 32px rgba(0,0,0,.4);
  --transition: .28s cubic-bezier(.4,0,.2,1);
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --mono: 'JetBrains Mono', monospace;
}
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}
::selection { background: var(--accent); color: #fff; }
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg-card); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

.app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 24px 60px;
}

.header {
  text-align: center;
  margin-bottom: 44px;
  padding: 40px 20px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
}
.header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 100%, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}
.header h1 {
  font-size: 36px;
  font-weight: 900;
  background: linear-gradient(135deg, var(--accent) 0%, #4d86ff 40%, #f472b6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
}
.header p {
  color: var(--text-secondary);
  font-size: 15px;
  margin-top: 8px;
  position: relative;
}
.header .badges {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 16px;
  flex-wrap: wrap;
  position: relative;
}
.header .badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  padding: 5px 14px;
  border-radius: 20px;
  background: var(--accent-subtle);
  color: var(--accent);
  border: 1px solid rgba(124,92,252,.2);
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 24px;
  transition: border-color var(--transition);
}
.card:hover { border-color: var(--border-accent); }
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 12px;
}
.card-title {
  font-size: 17px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
}
.card-title .emoji { font-size: 20px; }
.card-action { flex-shrink: 0; }

/* ===== FORM ELEMENTS ===== */
label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: .5px;
  display: block;
  margin-bottom: 6px;
}
input[type="text"],
input[type="number"],
input[type="color"],
textarea,
select {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  transition: all var(--transition);
  outline: none;
}
input:focus, textarea:focus, select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
input[type="color"] {
  height: 52px;
  padding: 4px;
  cursor: pointer;
  border-radius: var(--radius-sm);
  min-width: 60px;
}
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 3px;
  outline: none;
  margin: 8px 0;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--text);
  cursor: pointer;
  transition: transform .15s;
  box-shadow: 0 2px 8px rgba(0,0,0,.3);
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.15); }
input[type="checkbox"] {
  accent-color: var(--accent);
  width: 17px;
  height: 17px;
  cursor: pointer;
}
select { cursor: pointer; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 9px 18px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--accent-glow);
}
.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  background: var(--bg-hover);
  color: var(--text);
  border-color: var(--border-accent);
  transform: translateY(-1px);
}
.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}
.btn-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
@media (max-width: 700px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}
.flex-row { display: flex; gap: 16px; flex-wrap: wrap; align-items: end; }
.flex-col { flex: 1; min-width: 140px; }

.color-swatch-large {
  width: 100%;
  height: 140px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: background .15s;
  position: relative;
  overflow: hidden;
}
.color-swatch-large::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 -40px 60px -20px rgba(0,0,0,.4);
  pointer-events: none;
}
.color-values {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 16px;
}
.color-values .value-group { background: var(--bg); border-radius: var(--radius-xs); padding: 8px 12px; }
.color-values .value-group .label { font-size: 10px; text-transform: uppercase; letter-spacing: .8px; color: var(--text-muted); font-weight: 600; }
.color-values .value-group .value { font-family: var(--mono); font-size: 13px; margin-top: 2px; color: var(--text); cursor: pointer; transition: color var(--transition); }
.color-values .value-group .value:hover { color: var(--accent); }

.palette-type-btn {
  padding: 7px 16px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}
.palette-type-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-subtle);
}
.palette-type-btn.active {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}
.palette-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 10px;
  margin-top: 16px;
}
.palette-swatch {
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  cursor: pointer;
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 8px;
  font-family: var(--mono);
  font-size: 10px;
  color: rgba(255,255,255,.9);
  text-shadow: 0 1px 4px rgba(0,0,0,.5);
  transition: all var(--transition);
  overflow: hidden;
}
.palette-swatch:hover {
  transform: scale(1.06);
  z-index: 2;
  box-shadow: 0 4px 20px rgba(0,0,0,.4);
}
.palette-swatch .copy-hint {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%) scale(.8);
  opacity: 0;
  transition: all var(--transition);
  background: rgba(0,0,0,.7);
  backdrop-filter: blur(4px);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 11px;
  font-family: var(--font);
  text-shadow: none;
  pointer-events: none;
}
.palette-swatch:hover .copy-hint { opacity: 1; transform: translate(-50%,-50%) scale(1); }
.palette-swatch .lock-btn {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: none;
  background: rgba(0,0,0,.4);
  backdrop-filter: blur(4px);
  color: #fff;
  font-size: 13px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
}
.palette-swatch:hover .lock-btn { opacity: 1; }
.palette-swatch .lock-btn.locked { opacity: 1; background: var(--accent); }

/* ===== CONTRAST ===== */
.contrast-preview {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100px;
  border-radius: var(--radius-sm);
  padding: 24px;
  font-size: 18px;
  font-weight: 600;
  transition: all var(--transition);
  border: 1px solid var(--border);
  margin-top: 12px;
}
.contrast-ratios {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 16px;
}
.contrast-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
}
.contrast-badge .pill {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 700;
}
.contrast-badge .pill.pass { background: rgba(52,211,153,.2); color: var(--success); }
.contrast-badge .pill.fail { background: rgba(248,113,113,.2); color: var(--danger); }

.gradient-preview {
  width: 100%;
  height: 120px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: background .3s;
  margin-top: 12px;
}
.gradient-controls {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: end;
}
.gradient-controls .color-input-wrap { flex: 1; min-width: 120px; }

.color-history-grid {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 12px;
}
.color-history-item {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border);
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
}
.color-history-item:hover {
  transform: scale(1.15);
  border-color: var(--accent);
  box-shadow: 0 0 16px var(--accent-glow);
}

.export-code {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.7;
  white-space: pre-wrap;
  max-height: 200px;
  overflow-y: auto;
  margin-top: 12px;
}

.toast {
  position: fixed;
  bottom: 28px;
  right: 28px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-sm);
  padding: 13px 22px;
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow);
  transform: translateY(100px);
  opacity: 0;
  transition: all var(--transition);
  z-index: 999;
  pointer-events: none;
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--danger); }

@media (max-width: 600px) {
  .app { padding: 16px 12px 40px; }
  .header { padding: 28px 16px 24px; }
  .header h1 { font-size: 26px; }
  .card { padding: 20px; }
  .color-values { grid-template-columns: 1fr; }
  .color-swatch-large { height: 100px; }
  .palette-grid { grid-template-columns: repeat(auto-fill, minmax(70px, 1fr)); }
}