@layer base, components, utilities;

@layer base {
  :root {
    --bg-color: oklch(98% 0.01 200);
    --text-color: oklch(15% 0.02 200);
    --text-muted: oklch(45% 0.02 200);
    --primary-color: oklch(50% 0.15 250); /* AI Blue-ish */
    --accent-color: oklch(65% 0.2 300);
    --surface-color: oklch(100% 0 0 / 70%);
    --bg-surface: oklch(96% 0.01 200);
    
    --font-serif: 'Playfair Display', serif;
    --font-sans: 'Inter', system-ui, sans-serif;
    
    --container-width: 1400px;
    --section-py: 10rem;
    
    --shadow-soft: 0 10px 30px oklch(0% 0 0 / 4%);
    --shadow-deep: 0 40px 100px oklch(0% 0 0 / 8%);
    --noise-opacity: 0.03;
  }

  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }
  body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-sans);
    line-height: 1.5;
    overflow-x: hidden;
    position: relative;
  }

  /* Animated Noise */
  body::before {
    content: ""; position: fixed; top: -50%; left: -50%; width: 200%; height: 200%;
    opacity: var(--noise-opacity); z-index: 9999; pointer-events: none;
    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");
    animation: grain 10s steps(10) infinite;
  }
  @keyframes grain {
    0%, 100% { transform: translate(0, 0); }
    10% { transform: translate(-5%, -10%); }
    20% { transform: translate(-15%, 5%); }
    50% { transform: translate(-10%, 15%); }
  }

  h1, h2, h3 { font-family: var(--font-serif); font-weight: 900; letter-spacing: -0.04em; }
  a { color: inherit; text-decoration: none; transition: all 0.3s ease; }
}

@layer components {
  .container { max-width: var(--container-width); margin: 0 auto; padding: 0 2rem; }
  .py-xl { padding: var(--section-py) 0; }
  .bg-surface { background: var(--bg-surface); }
  .center { text-align: center; }
  .mt-xl { margin-top: 4rem; }

  /* Section Header */
  .section-header { margin-bottom: 5rem; }
  .section-header h2 { font-size: clamp(3rem, 6vw, 4.5rem); margin-top: 1.5rem; }
  .tag {
    display: inline-block; padding: 0.5rem 1.2rem; background: white; border-radius: 3rem;
    font-size: 0.75rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.15em;
    color: var(--primary-color); box-shadow: var(--shadow-soft);
  }

  /* Buttons */
  .btn {
    display: inline-flex; align-items: center; padding: 1.2rem 3rem; border-radius: 4rem;
    font-weight: 700; font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.1em;
    cursor: pointer; transition: all 0.5s cubic-bezier(0.19, 1, 0.22, 1);
  }
  .btn-primary { background: var(--text-color); color: white; box-shadow: 0 20px 40px oklch(0% 0 0 / 15%); }
  .btn-primary:hover { transform: translateY(-5px); background: var(--primary-color); box-shadow: 0 30px 60px oklch(50% 0.15 250 / 30%); }
  .btn-outline { border: 1px solid oklch(0% 0 0 / 10%); }
  .btn-outline:hover { background: white; transform: translateY(-5px); box-shadow: var(--shadow-soft); }

  /* Video Hero */
  #hero-video {
    height: 100vh; width: 100%; position: relative; overflow: hidden;
    display: flex; align-items: center; justify-content: center; text-align: center;
  }
  .video-container { position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: 1; }
  #bg-video { width: 100%; height: 100%; object-fit: cover; }
  .video-overlay {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(to bottom, rgba(0,0,0,0.2), rgba(0,0,0,0.5));
    backdrop-filter: blur(2px);
  }
  .hero-content { z-index: 10; color: white; max-width: 900px; padding: 0 2rem; }
  .hero-content h1 { font-size: clamp(4rem, 12vw, 10rem); color: white; margin-bottom: 1.5rem; text-shadow: 0 10px 30px rgba(0,0,0,0.3); }
  .hero-content p { font-size: 1.4rem; font-weight: 300; opacity: 0.9; margin-bottom: 3rem; }
  .hero-content .tag { background: rgba(255,255,255,0.2); color: white; backdrop-filter: blur(10px); }

  /* 3x3 Recommended Grid */
  .grid-3x3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
  }

  /* Reveal Utility */
  .reveal { opacity: 0; transform: translateY(40px); transition: all 1.2s cubic-bezier(0.19, 1, 0.22, 1); }
  .reveal.active { opacity: 1; transform: translateY(0); }

  /* Skill/Category Cards */
  .skills-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: 3rem; }
  .skill-card { padding: 4rem; border-radius: 2rem; transition: all 0.5s ease; text-align: center; }
  .skill-card:hover { transform: translateY(-15px); background: white; box-shadow: var(--shadow-deep); }
  .skill-card i { width: 3rem; height: 3rem; color: var(--primary-color); margin-bottom: 2rem; }
}

@layer utilities {
  .glass { background: var(--surface-color); backdrop-filter: blur(20px); border: 1px solid oklch(100% 0 0 / 15%); }
}

@media (max-width: 1024px) {
  .grid-3x3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .grid-3x3 { grid-template-columns: 1fr; }
  .hero-content h1 { font-size: 4rem; }
  :root { --section-py: 6rem; }
}