:root {
  --bg-body: #1a1a1a;
  --bg-preview: #111;
  --bg-panel: #222;
  --bg-input: #333;
  --bg-input-hover: #444;
  --bg-code: #111;
  --border-color: #333;
  --border-input: #444;
  --text-primary: #e0e0e0;
  --text-secondary: #aaa;
  --text-muted: #666;
  --text-code: #4ecdc4;
  --accent: #3498db;
  --accent-hover: #2980b9;
  --danger: #c0392b;
  --danger-hover: #e74c3c;
  --shadow: rgba(0, 0, 0, 0.5);
  --picker-border: #444;
  --gradient-radius: 16px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg-body: #fdfcfa;
    --bg-preview: #f9f8f5;
    --bg-panel: #ffffff;
    --bg-input: #f0f0f0;
    --bg-input-hover: #e5e5e5;
    --bg-code: #f8f8f8;
    --border-color: #ddd;
    --border-input: #ccc;
    --text-primary: #333;
    --text-secondary: #555;
    --text-muted: #888;
    --text-code: #0d7377;
    --accent: #2980b9;
    --accent-hover: #1a5276;
    --danger: #c0392b;
    --danger-hover: #e74c3c;
    --shadow: rgba(0, 0, 0, 0.15);
    --picker-border: #bbb;
    --gradient-radius: 16px;
  }
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-body);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
}

.preview-panel {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  overflow: hidden;
}

.gradient-container {
  border-radius: var(--gradient-radius);
  overflow: hidden;
  position: relative;
  max-width: calc(100vw - 80px);
  max-height: calc(100vh - 80px);
  aspect-ratio: 1200 / 630;
}

.gradient-container canvas {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.debug-marker {
  position: absolute;
  z-index: 100;
  pointer-events: none;
}

.debug-center {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 0 4px rgba(0, 0, 0, 0.5);
  transform: translate(-50%, -50%);
  cursor: grab;
  pointer-events: auto;
}

.debug-center:hover {
  transform: translate(-50%, -50%) scale(1.2);
}

.debug-center.dragging {
  cursor: grabbing;
  transform: translate(-50%, -50%) scale(1.3);
}

.debug-radius {
  border: 1px dashed rgba(255, 255, 255, 0.4);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.controls-panel {
  width: 280px;
  padding: 16px;
  margin: 20px;
  border-radius: 12px;
  background: #ffffff;
  box-shadow: 0 4px 20px var(--shadow);
  align-self: center;
  max-height: calc(100vh - 80px);
  overflow-y: auto;
  font-size: 14px;
}

h1 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.section {
  margin-bottom: 12px;
}

.section:last-child {
  margin-bottom: 0;
}

.section-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 6px;
  margin-top: 16px;
}

.control {
  margin-bottom: 8px;
}

.control-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 3px;
}

.control-inline {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  padding: 6px 0;
}

.control-inline:has(.select-wrapper) {
  padding: 2px 0;
}

.control-inline label {
  min-width: 52px;
  flex-shrink: 0;
}

.control-inline input[type="range"] {
  flex: 1;
}

.control-inline .select-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
  padding: 0 8px;
  border: 1px solid transparent;
  border-radius: 8px;
}

.control-inline .select-wrapper select {
  flex: 1;
  padding: 1.5px 20px 1.5px 6px;
  background: white;
  border: none;
  border-radius: 3px;
  color: #333;
  font-size: 13px;
  font-weight: 500;
  line-height: 1;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23333' d='M6 8L2 4h8z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 6px center;
  background-size: 10px;
}

.control-inline .select-wrapper select:focus {
  outline: none;
}

.control-inline .section-title {
  margin-bottom: 0;
  min-width: auto;
  flex-shrink: 0;
}

label {
  font-size: 13px;
  color: var(--text-secondary);
}

input[type="range"] {
  width: 100%;
  height: 4px;
  -webkit-appearance: none;
  background: #d1d5db;
  border-radius: 2px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  background: white;
  border: 1px solid rgba(0, 0, 0, 0.15);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

input[type="range"]::-moz-range-track {
  width: 100%;
  height: 4px;
  background: #d1d5db;
  border-radius: 2px;
  border: none;
}

input[type="range"]::-moz-range-progress {
  height: 4px;
  background: #1f2937;
  border-radius: 2px;
}

input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  background: white;
  border: 1px solid rgba(0, 0, 0, 0.15);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

input[type="number"] {
  width: 70px;
  padding: 6px;
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: 4px;
  color: var(--text-primary);
  font-size: 14px;
}

select {
  width: 100%;
  padding: 6px 10px;
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: 4px;
  color: var(--text-primary);
  font-size: 14px;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23888' d='M6 8L2 4h8z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
}

.dimensions-compact {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-left: -8px;
}

.dim-input {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 2px 8px;
  border: 1px solid transparent;
  border-radius: 8px;
  transition: border-color 0.15s;
}

.dim-input:hover,
.dim-input:focus-within {
  border-color: var(--border-input);
}

.dim-input label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  min-width: 12px;
}

.dim-input input[type="number"] {
  width: 48px;
  padding: 4px 6px;
  background: white;
  border: none;
  border-radius: 3px;
  color: #333;
  font-size: 13px;
  font-weight: 500;
}

.dim-input input[type="number"]:focus {
  outline: none;
}

.dim-input input[type="number"]::-webkit-inner-spin-button,
.dim-input input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.dim-input input[type="number"] {
  -moz-appearance: textfield;
}

.colors-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin: 6px 0;
  min-height: 32px;
  min-width: 1px;
}

.color-item {
  position: relative;
}

.color-item.sortable-ghost .color-picker {
  opacity: 0.2;
}

.color-item.sortable-ghost .color-remove {
  display: none;
}

.color-item.sortable-chosen {
  opacity: 0.9;
}

.color-item.sortable-fallback {
  transform: scale(1.1);
  box-shadow: 0 4px 12px var(--shadow);
  border-radius: 4px;
}

.colors-list.sorting .color-remove {
  display: none;
}

.color-picker {
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  padding: 0;
  background: none;
}

.color-picker::-webkit-color-swatch-wrapper {
  padding: 0;
}

.color-picker::-webkit-color-swatch {
  border: 2px solid var(--picker-border);
  border-radius: 4px;
}

.color-picker:hover+.color-remove {
  opacity: 1;
}

.color-hex {
  display: none;
}

.color-remove {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 14px;
  height: 14px;
  background: var(--danger);
  border: none;
  border-radius: 50%;
  color: #fff;
  cursor: pointer;
  font-size: 11px;
  line-height: 12px;
  text-align: center;
  opacity: 0;
  transition: opacity 0.15s;
}

.color-item:hover .color-remove {
  opacity: 1;
}

.color-remove:hover {
  background: var(--danger-hover);
}

.btn {
  width: 100%;
  padding: 6px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  margin-top: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.15s ease;
}

.btn svg {
  flex-shrink: 0;
}

.btn-sm {
  padding: 5px 8px;
  font-size: 11px;
}

.btn-secondary {
  background: #fdfcfa;
  color: var(--text-primary);
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.btn-secondary:hover {
  background: #f5f2ed;
  border-color: rgba(0, 0, 0, 0.1);
}

.btn-secondary:active {
  background: #eeebe5;
  border-color: rgba(0, 0, 0, 0.15);
}

.btn-secondary:focus {
  outline: none;
  border-color: rgba(0, 0, 0, 0.15);
}

.btn-primary {
  background: #fdfcfa;
  color: var(--text-primary);
  border: 1px solid rgba(0, 0, 0, 0.1);
}

.btn-primary:hover {
  background: #f2efe8;
  border-color: rgba(0, 0, 0, 0.15);
}

.btn-primary:active {
  background: var(--text-primary);
  color: var(--bg-panel);
  border-color: var(--text-primary);
}

.btn-primary:focus {
  outline: none;
  background: #f2efe8;
  border-color: rgba(0, 0, 0, 0.15);
}

.btn-row {
  display: flex;
  gap: 8px;
}

.btn-row .btn {
  flex: 1;
}

.code-output {
  padding: 10px;
  background: var(--bg-code);
  min-height: 64px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-family: monospace;
  font-size: 10px;
  color: var(--text-muted);
  min-height: 70px;
  max-height: 120px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

.tabs {
  display: flex;
  gap: 4px;
  margin-top: 12px;
  margin-bottom: 0;
}

.tab {
  flex: 1;
  padding: 6px;
  background: var(--bg-input);
  border: none;
  border-radius: 6px;
  color: var(--text-muted);
  font-size: 12px;
  cursor: pointer;
}

.tab.active {
  background: var(--text-primary);
  color: var(--bg-panel);
}

.divider {
  height: 1px;
  background: var(--border-color);
  margin: 16px -16px;
}

.export-row {
  display: flex;
  gap: 8px;
  align-items: center;
}

.export-row .btn {
  flex: 1;
  margin-top: 0;
  padding: 6px 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.export-row .btn svg {
  flex-shrink: 0;
}

.export-row select {
  width: 70px;
  flex-shrink: 0;
  padding: 1.5px 24px 1.5px 10px;
  background: white;
  border: 1px solid transparent;
  border-radius: 4px;
  color: #333;
  font-size: 13px;
  font-weight: 500;
  line-height: 1;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23333' d='M6 8L2 4h8z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  background-size: 10px;
}

.export-row select:focus {
  outline: none;
}


@media (max-width: 768px) {
  body {
    flex-direction: column;
  }

  .preview-panel {
    padding: 12px;
  }

  .gradient-container {
    max-width: calc(100vw - 24px);
    max-height: calc(100vh - 24px);
  }

  .controls-panel {
    width: calc(100% - 24px);
    margin: 0 12px 12px 12px;
    padding: 20px;
    border-radius: 12px;
    max-height: none;
    align-self: stretch;
  }
}