:root {
  --background: #ffffff;
  --foreground: #09090b;
  --card: #ffffff;
  --card-foreground: #09090b;
  --border: #e4e4e7;
  --input: #e4e4e7;
  --primary: #18181b;
  --primary-foreground: #fafafa;
  --secondary: #f4f4f5;
  --secondary-foreground: #18181b;
  --muted: #f4f4f5;
  --muted-foreground: #71717a;
  --accent: #f4f4f5;
  --accent-foreground: #18181b;
  --destructive: #ef4444;
  --destructive-foreground: #fafafa;
  --ring: #18181b;
  --radius: 6px;
}

.dark {
  --background: #09090b;
  --foreground: #fafafa;
  --card: #09090b;
  --card-foreground: #fafafa;
  --border: #27272a;
  --input: #27272a;
  --primary: #fafafa;
  --primary-foreground: #18181b;
  --secondary: #27272a;
  --secondary-foreground: #fafafa;
  --muted: #27272a;
  --muted-foreground: #a1a1aa;
  --accent: #27272a;
  --accent-foreground: #fafafa;
  --destructive: #7f1d1d;
  --destructive-foreground: #fafafa;
  --ring: #d4d4d8;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--background);
  color: var(--foreground);
  line-height: 1.5;
  transition: background 0.2s, color 0.2s;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.header h1 {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.5px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--background);
  color: var(--foreground);
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
}

.btn:hover {
  background: var(--accent);
}

.btn-primary {
  background: var(--primary);
  color: var(--primary-foreground);
  border-color: var(--primary);
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-icon {
  padding: 8px;
}

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
}

.card-header {
  padding: 16px;
  border-bottom: 1px solid var(--border);
}

.card-header h2 {
  font-size: 16px;
  font-weight: 600;
}

.card-body {
  padding: 16px;
}

.input {
  width: 100%;
  padding: 8px 12px;
  font-size: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--background);
  color: var(--foreground);
  transition: border-color 0.15s;
}

.input:focus {
  outline: none;
  border-color: var(--ring);
}

.label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 8px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.flex {
  display: flex;
  gap: 16px;
}

.flex-col {
  flex-direction: column;
}

.flex-1 {
  flex: 1;
}

.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mb-4 { margin-bottom: 16px; }

.text-sm {
  font-size: 14px;
  color: var(--muted-foreground);
}

.text-center {
  text-align: center;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.table th,
.table td {
  padding: 8px 12px;
  text-align: left;
  border: 1px solid var(--border);
}

.table th {
  background: var(--muted);
  font-weight: 600;
}

.table tr:hover {
  background: var(--muted);
}

.canvas-container {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--muted);
}

#vectorCanvas {
  display: block;
  cursor: crosshair;
}

.vector-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.vector-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
}

.vector-color {
  width: 16px;
  height: 16px;
  border-radius: 4px;
  border: 1px solid var(--border);
}

.vector-info {
  flex: 1;
}

.vector-name {
  font-weight: 600;
  font-size: 14px;
}

.vector-coords {
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;
  font-size: 12px;
  color: var(--muted-foreground);
}

.btn-sm {
  padding: 4px 8px;
  font-size: 12px;
}

.hero {
  text-align: center;
  padding: 80px 24px;
}

.hero h1 {
  font-size: 48px;
  font-weight: 700;
  letter-spacing: -2px;
  margin-bottom: 16px;
}

.hero p {
  font-size: 20px;
  color: var(--muted-foreground);
  margin-bottom: 40px;
}

.mode-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  max-width: 600px;
  margin: 0 auto;
}

.mode-card {
  padding: 32px;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s;
}

.mode-card:hover {
  border-color: var(--ring);
}

.mode-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
}

.mode-card p {
  color: var(--muted-foreground);
}

.similarity-high {
  color: #16a34a;
  font-weight: 600;
}

.similarity-medium {
  color: #ca8a04;
  font-weight: 600;
}

.similarity-low {
  color: #dc2626;
  font-weight: 600;
}

@media (max-width: 768px) {
  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
  }

  .mode-cards {
    grid-template-columns: 1fr;
  }

  .header {
    flex-direction: column;
    gap: 16px;
    align-items: flex-start;
  }

  .nav {
    width: 100%;
    justify-content: space-between;
  }
}