@layer base, components, utilities;

@layer base {
  :root {
    /* Color Palette (OKLCH) */
    --primary: oklch(65.57% 0.19 252.73);
    --primary-light: oklch(75% 0.15 250);
    --secondary: oklch(62.42% 0.19 14.93);
    --accent: oklch(85% 0.2 100);
    --background: oklch(98.5% 0.01 250);
    --surface: oklch(100% 0 0);
    --text-primary: oklch(25% 0.02 250);
    --text-secondary: oklch(45% 0.02 250);
    --border: oklch(90% 0.02 250);
    
    /* Spacing & Layout */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --container-max-width: 1100px;
    --header-height: 70px;

    /* Shadows */
    --shadow-soft: 0 4px 12px oklch(0% 0 0 / 5%);
    --shadow-deep: 0 10px 30px oklch(0% 0 0 / 10%);
    --shadow-glow: 0 0 20px oklch(65.57% 0.19 252.73 / 20%);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
  }

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

  body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    /* Subtle noise texture */
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    background-blend-mode: soft-light;
    opacity: 0.98;
  }

  h1, h2, h3, h4 {
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
  }

  a {
    color: inherit;
    text-decoration: none;
  }
}

@layer components {
  .container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
  }

  /* Responsive Blog Feed Grid */
  .blog-feed {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    padding: var(--spacing-lg) 0;
  }

  @container (max-width: 400px) {
    .blog-feed {
      grid-template-columns: 1fr;
    }
  }

  /* Shared interactive glow effect */
  .interactive-glow:hover {
    box-shadow: var(--shadow-glow);
    transform: translateY(-4px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }
}

@layer utilities {
  .text-gradient {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .glassmorphism {
    background: oklch(100% 0 0 / 70%);
    backdrop-filter: blur(12px);
    border: 1px solid oklch(100% 0 0 / 20%);
  }
}