@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

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

:root {
  --canvas: #000000;
  --sidebar: #0a0a0a;
  --control-bg: #0f0f0f;
  --control-track: #333333;
  --border: #1a1a1a;
  --border-hover: #333333;
  --text-primary: #ededed;
  --text-secondary: #a0a0a0;
  --text-tertiary: #666666;
  --text-muted: #4a4a4a;
  --radius: 6px;
}

body {
  font-family: 'Inter', ui-sans-serif, system-ui, sans-serif;
  background: var(--canvas);
  color: var(--text-primary);
  height: 100svh;
  overflow: hidden;
}

.layout {
  display: flex;
  height: 100svh;
}

/* Sidebar */
#controls {
  width: 280px;
  min-width: 280px;
  background: var(--sidebar);
  border-right: 1px solid var(--border);
  padding: 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
  scrollbar-width: thin;
  scrollbar-color: #333 transparent;
}

#controls::-webkit-scrollbar {
  width: 4px;
}

#controls::-webkit-scrollbar-thumb {
  background: #333;
  border-radius: 2px;
}

#controls::-webkit-scrollbar-track {
  background: transparent;
}

/* Header */
h1 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

h1 span {
  font-weight: 400;
  color: var(--text-tertiary);
  font-size: 11px;
  display: block;
  margin-top: 2px;
}

/* Sections */
.group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.group-title {
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  padding-top: 4px;
  border-top: 1px solid var(--border);
}

/* Labels */
label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 12px;
  color: var(--text-secondary);
}

/* Toggle */
.toggle-row {
  display: flex;
  gap: 2px;
  background: var(--control-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2px;
}

.toggle-label {
  flex: 1;
  text-align: center;
  cursor: pointer;
}

.toggle-label input {
  display: none;
}

.toggle-label span {
  display: block;
  padding: 5px 8px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-tertiary);
  transition: all 0.15s;
}

.toggle-label:hover span {
  color: var(--text-secondary);
}

.toggle-label input:checked + span {
  background: var(--text-primary);
  color: var(--canvas);
}

/* Inputs */
input[type='number'] {
  height: 28px;
  width: 100%;
  background: var(--control-bg);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 0 8px;
  border-radius: var(--radius);
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 12px;
  outline: none;
  transition: border-color 0.15s;
}

input[type='number']:hover {
  border-color: var(--border-hover);
}

input[type='number']:focus {
  border-color: var(--text-tertiary);
}

/* Range Slider */
input[type='range'] {
  -webkit-appearance: none;
  width: 100%;
  height: 2px;
  border-radius: 1px;
  background: var(--control-track);
  outline: none;
}

input[type='range']::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #ffffff;
  cursor: pointer;
  border: none;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.3), 0 1px 3px rgba(0, 0, 0, 0.4);
}

input[type='range']::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #ffffff;
  cursor: pointer;
  border: none;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.3), 0 1px 3px rgba(0, 0, 0, 0.4);
}

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

.range-row input[type='range'] {
  flex: 1;
}

.range-value {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 12px;
  color: var(--text-tertiary);
  min-width: 44px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* Download Section */
.download-section {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#dimDisplay {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 11px;
  color: var(--text-tertiary);
  text-align: center;
  font-variant-numeric: tabular-nums;
}

#warning {
  display: none;
  background: #1a1200;
  border: 1px solid #332a00;
  color: #cc9900;
  padding: 6px 8px;
  border-radius: var(--radius);
  font-size: 11px;
  line-height: 1.4;
}

#downloadBtn {
  background: var(--text-primary);
  color: var(--canvas);
  border: none;
  height: 32px;
  padding: 0 12px;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 500;
  font-family: 'Inter', ui-sans-serif, system-ui, sans-serif;
  cursor: pointer;
  transition: background 0.15s;
}

#downloadBtn:hover {
  background: #e0e0e0;
}

#downloadBtn:active {
  background: #cccccc;
}

/* Viewer */
#viewer {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: var(--canvas);
}

#viewer canvas {
  display: block;
}