/* CSS Variables & Theme */
:root {
  /* Colors - Derived from a premium, modern palette (Dark mode preference initially) */
  --color-bg-primary: #0f172a; /* Slate 900 */
  --color-bg-secondary: #1e293b; /* Slate 800 */
  --color-bg-tertiary: #334155; /* Slate 700 */

  --color-text-primary: #f8fafc; /* Slate 50 */
  --color-text-secondary: #94a3b8; /* Slate 400 */
  --color-text-highlight: #38bdf8; /* Sky 400 */

  --color-accent: #6366f1; /* Indigo 500 */
  --color-success: #10b981; /* Emerald 500 */
  --color-danger: #ef4444; /* Red 500 */
  --color-warning: #f59e0b; /* Amber 500 */

  /* Typography */
  --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;

  /* Borders & Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --border-color: #334155; /* Slate 700 */

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

/* Reset & Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family-base);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html {
  overflow-y: scroll;
}

/* Utilities */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.text-success {
  color: var(--color-success);
}

.text-danger {
  color: var(--color-danger);
}

.text-secondary {
  color: var(--color-text-secondary);
}

.card {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
}

/* Interactive Elements */
.category-pill:hover {
  opacity: 0.8;
  background-color: var(--color-accent) !important;
  color: white;
}

.account-cell:hover {
  color: var(--color-text-highlight) !important;
  text-decoration-color: var(--color-text-highlight) !important;
}

.category-legend-item:hover {
  color: var(--color-text-highlight) !important;
  text-decoration-color: var(--color-text-highlight) !important;
}