/* ==========================================================================
   Domain 29 — Financial SEC Filing QA — Design System (Light Mode)
   Version: V2.6
   
   Premium light-mode design system for financial data visualization.
   Optimized for trust, precision, and extended reading sessions.
   ========================================================================== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&family=Outfit:wght@400;500;600;700;800&display=swap');

/* --- Design Tokens --- */
:root {
  /* Surface Colors — Light Mode */
  --bg-base: #F8FAFC;
  --bg-surface-1: #FFFFFF;
  --bg-surface-2: #F1F5F9;
  --bg-surface-3: #E2E8F0;
  --bg-glass: rgba(255, 255, 255, 0.75);
  --bg-glass-hover: rgba(255, 255, 255, 0.88);

  /* Text Colors */
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-muted: #94A3B8;
  --text-inverse: #FFFFFF;

  /* Accent Colors (contrast-adjusted for light backgrounds) */
  --accent-cyan: #0891B2;
  --accent-cyan-light: #22D3EE;
  --accent-cyan-glow: rgba(8, 145, 178, 0.12);
  --accent-cyan-border: rgba(8, 145, 178, 0.30);

  --accent-emerald: #059669;
  --accent-emerald-light: #34D399;
  --accent-emerald-glow: rgba(5, 150, 105, 0.10);
  --accent-emerald-border: rgba(5, 150, 105, 0.25);

  --accent-amber: #D97706;
  --accent-amber-light: #FBBF24;
  --accent-amber-glow: rgba(217, 119, 6, 0.10);
  --accent-amber-border: rgba(217, 119, 6, 0.25);

  --accent-red: #DC2626;
  --accent-red-glow: rgba(220, 38, 38, 0.08);

  /* Borders & Dividers */
  --border-subtle: rgba(0, 0, 0, 0.06);
  --border-default: rgba(0, 0, 0, 0.10);
  --border-highlight: rgba(8, 145, 178, 0.25);

  /* Shadows (light mode depth) */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.06), 0 0 1px rgba(0, 0, 0, 0.08);
  --shadow-card-hover: 0 8px 24px rgba(0, 0, 0, 0.10), 0 0 1px rgba(0, 0, 0, 0.10);

  /* Typography */
  --font-display: 'Outfit', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --text-xs: 0.75rem;    /* 12px */
  --text-sm: 0.875rem;   /* 14px */
  --text-base: 1rem;     /* 16px */
  --text-lg: 1.125rem;   /* 18px */
  --text-xl: 1.25rem;    /* 20px */
  --text-2xl: 1.5rem;    /* 24px */
  --text-3xl: 1.875rem;  /* 30px */
  --text-4xl: 2.25rem;   /* 36px */

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Radii */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Transitions */
  --ease-out: cubic-bezier(0.33, 1, 0.68, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;

  /* Layout */
  --nav-height: 64px;
  --sidebar-width: 280px;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  min-height: 100vh;
}

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

a:hover {
  color: var(--accent-cyan-light);
}

a:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

button:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* --- Glassmorphic Panel --- */
.glass-panel {
  background: var(--bg-glass);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-out);
}

.glass-panel:hover {
  box-shadow: var(--shadow-card-hover);
}

/* --- Layout --- */
.app-layout {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.main-content {
  flex: 1;
  padding: var(--space-8);
  padding-top: calc(var(--nav-height) + var(--space-8));
  max-width: 1440px;
  margin: 0 auto;
  width: 100%;
}

.main-content-full {
  flex: 1;
  padding-top: var(--nav-height);
  width: 100%;
}

/* Grid Utilities */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

@media (max-width: 1200px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .main-content { padding: var(--space-4); padding-top: calc(var(--nav-height) + var(--space-4)); }
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-surface-2);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-surface-3);
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-surface-2);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* --- Utility Classes --- */
.text-display {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.text-mono {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
}

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

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

.text-emerald {
  color: var(--accent-emerald);
}

.text-amber {
  color: var(--accent-amber);
}

.text-cyan {
  color: var(--accent-cyan);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* --- Selection --- */
::selection {
  background: var(--accent-cyan-glow);
  color: var(--text-primary);
}