@layer base, components, utilities;

@layer base {
  :root {
    /* Professional FinTech Palette (Light) */
    --bg-color: oklch(0.99 0.005 240);
    --text-color: oklch(0.15 0.02 240);
    --text-muted: oklch(0.45 0.02 240);
    --primary-color: oklch(0.45 0.18 250); /* Deep Professional Blue */
    --accent-color: oklch(0.6 0.18 160); /* Emerald Growth */
    --warning-color: oklch(0.7 0.15 50); /* Amber warning */
    
    --card-bg: rgba(255, 255, 255, 0.85);
    --card-border: oklch(0.92 0.01 240);
    --card-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.05), 0 2px 4px -2px rgb(0 0 0 / 0.05);
    --card-shadow-hover: 0 20px 25px -5px rgb(0 0 0 / 0.05), 0 8px 10px -6px rgb(0 0 0 / 0.05);
    
    --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --radius-xl: 1rem;
    --radius-lg: 0.75rem;
    --radius-md: 0.5rem;
  }

  [data-theme="dark"] {
    --bg-color: oklch(0.1 0.02 240);
    --text-color: oklch(0.98 0.01 240);
    --text-muted: oklch(0.7 0.02 240);
    --primary-color: oklch(0.65 0.15 250);
    --accent-color: oklch(0.75 0.15 160);
    
    --card-bg: rgba(23, 23, 23, 0.8);
    --card-border: oklch(0.25 0.02 240 / 0.5);
    --card-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.3);
    --card-shadow-hover: 0 20px 25px -5px rgb(0 0 0 / 0.4);
  }

  body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    margin: 0;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    background-image: 
      radial-gradient(circle at 0% 0%, oklch(var(--primary-color) / 0.03) 0%, transparent 40%),
      radial-gradient(circle at 100% 100%, oklch(var(--accent-color) / 0.03) 0%, transparent 40%);
    background-attachment: fixed;
  }
}

@layer components {
  .app-header {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--card-border);
    padding: 0.75rem 2rem;
    position: sticky;
    top: 0;
    z-index: 1000;
  }

  .header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
  }

  .logo-icon {
    font-size: 1.5rem;
    filter: drop-shadow(0 2px 4px oklch(var(--primary-color) / 0.2));
  }

  .logo h1 {
    font-size: 1.125rem;
    margin: 0;
    font-weight: 800;
    letter-spacing: -0.04em;
    text-transform: uppercase;
    background: linear-gradient(135deg, var(--text-color), var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .theme-toggle {
    background: transparent;
    border: 1px solid var(--card-border);
    color: var(--text-color);
    padding: 0.5rem 0.875rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    font-size: 0.8125rem;
    transition: var(--transition-base);
  }

  .theme-toggle:hover {
    background: var(--card-border);
    transform: translateY(-1px);
  }

  .dashboard {
    max-width: 1400px;
    margin: 2.5rem auto;
    padding: 0 2rem;
    display: grid;
    gap: 2rem;
  }

  .market-overview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
  }

  .card {
    background: var(--card-bg);
    backdrop-filter: blur(24px);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-xl);
    padding: 1.75rem;
    box-shadow: var(--card-shadow);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
  }

  .card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-color);
    opacity: 0;
    transition: var(--transition-base);
  }

  .card:hover {
    box-shadow: var(--card-shadow-hover);
    transform: translateY(-2px);
    border-color: oklch(var(--primary-color) / 0.2);
  }

  .card:hover::before {
    opacity: 1;
  }

  .stat-card[data-index="nasdaq"]::before { background: oklch(0.6 0.18 160); }
  .stat-card[data-index="sp500"]::before { background: oklch(0.45 0.18 250); }
  .stat-card[data-index="djia"]::before { background: oklch(0.6 0.15 40); }

  .stat-card h3 {
    margin: 0;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 700;
  }

  .stat-card .price {
    font-size: 2.25rem;
    font-weight: 900;
    margin: 0.75rem 0;
    letter-spacing: -0.05em;
    font-variant-numeric: tabular-nums;
  }

  .stat-card .growth {
    font-weight: 600;
    font-size: 0.875rem;
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.625rem;
    background: oklch(var(--accent-color) / 0.1);
    color: var(--accent-color);
    border-radius: 2rem;
  }

  .chart-section {
    min-height: 500px;
  }

  .chart-card {
    padding: 2rem;
  }

  .chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
    gap: 1.5rem;
  }

  .chart-header h2 {
    margin: 0;
    font-size: 1.375rem;
    font-weight: 800;
    letter-spacing: -0.03em;
  }

  .chart-controls {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
  }

  .control-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
  }

  .control-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
  }

  .control-select {
    padding: 0.5rem 2rem 0.5rem 1rem;
    border-radius: var(--radius-md);
    background: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--card-border);
    font-family: inherit;
    font-weight: 700;
    font-size: 0.875rem;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='currentColor'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1rem;
    transition: var(--transition-base);
  }

  .control-select:hover {
    border-color: var(--primary-color);
  }

  .chart-container {
    height: 500px;
    position: relative;
  }

  .info-card {
    background: linear-gradient(to right, oklch(var(--primary-color) / 0.05), transparent);
    border-left: 4px solid var(--primary-color);
  }

  .info-card h3 {
    margin: 0 0 0.75rem 0;
    font-size: 1rem;
    font-weight: 800;
  }

  .info-card p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.875rem;
    line-height: 1.6;
  }

  .app-footer {
    padding: 3rem 2rem;
    border-top: 1px solid var(--card-border);
    margin-top: 4rem;
    background: var(--card-bg);
  }

  .footer-content {
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
  }

  .footer-content p {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 0;
    font-weight: 500;
  }
}

@media (max-width: 1024px) {
  .dashboard {
    padding: 0 1rem;
    margin: 1.5rem auto;
  }
  
  .chart-container {
    height: 400px;
  }
}

@media (max-width: 640px) {
  .header-content {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
  
  .chart-header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .stat-card .price {
    font-size: 1.75rem;
  }
}