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

    :root {
      --pink: #ff0080;
      --pink-light: #ff99cc;
      --pink-dark: #cc0066;
      --dark: #0a0a0a;
      --gray: #1a1a1a;
      --gray-light: #2a2a2a;
      --text: #e0e0e0;
      --text-muted: #999;
    }

    body.light-mode {
      --dark: #ffffff;
      --gray: #f5f5f5;
      --gray-light: #e5e5e5;
      --text: #1a1a1a;
      --text-muted: #666;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
      background: var(--dark);
      color: var(--text);
      line-height: 1.6;
      overflow-x: hidden;
      transition: background 0.3s ease, color 0.3s ease;
    }

    .theme-toggle {
      position: fixed;
      top: 2rem;
      right: 2rem;
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--gray);
      border: 2px solid var(--gray-light);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      transition: all 0.3s ease;
      z-index: 1000;
    }

    .theme-toggle:hover {
      transform: scale(1.1);
      background: var(--gray-light);
    }

    .theme-toggle:active {
      transform: scale(0.95);
    }

    .theme-icon {
      transition: opacity 0.3s ease, transform 0.3s ease;
    }

    .sun-icon {
      opacity: 0;
      position: absolute;
    }

    body.light-mode .sun-icon {
      opacity: 1;
    }

    body.light-mode .moon-icon {
      opacity: 0;
    }

    .container {
      max-width: 1400px;
      margin: 0 auto;
      padding: 3rem 2rem;
      display: grid;
      grid-template-columns: 300px 1fr;
      gap: 4rem;
      min-height: 100vh;
    }

    /* Header */
    header {
      position: sticky;
      top: 3rem;
      height: fit-content;
    }

    .logo {
      font-size: 1.75rem;
      font-weight: 700;
      color: var(--pink);
      letter-spacing: -0.02em;
      line-height: 1.2;
      opacity: 0;
    }

    .logo-accent {
      display: block;
      font-size: 0.875rem;
      color: var(--text-muted);
      font-weight: 400;
      margin-top: 0.5rem;
      letter-spacing: 0.1em;
      text-transform: uppercase;
    }

    /* Main Content */
    main {
      max-width: 800px;
    }

    .hero {
      margin-bottom: 4rem;
      opacity: 0;
    }

    .hero h1 {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 1rem;
      line-height: 1.1;
    }

    .hero-highlight {
      color: var(--pink);
      position: relative;
      display: inline-block;
    }

    .section {
      margin-bottom: 3rem;
      opacity: 0;
      transform: translateY(20px);
    }

    .section-icon {
      font-size: 2rem;
      margin-bottom: 1rem;
      display: inline-block;
    }

    .section h2 {
      font-size: 1.5rem;
      color: var(--text);
      margin-bottom: 0.75rem;
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }

    .section p {
      color: var(--text-muted);
      margin-bottom: 1rem;
      font-size: 1rem;
    }

    .section ul {
      list-style: none;
      margin: 1rem 0;
    }

    .section li {
      color: var(--text-muted);
      padding-left: 1.5rem;
      margin-bottom: 0.5rem;
      position: relative;
    }

    .section li::before {
      content: '→';
      position: absolute;
      left: 0;
      color: var(--pink);
      font-weight: bold;
    }

    .highlight-box {
      background: var(--gray-light);
      border-left: 3px solid var(--pink);
      padding: 1.5rem;
      margin: 2rem 0;
      border-radius: 0 8px 8px 0;
      opacity: 0;
    }

    .highlight-box h3 {
      color: var(--pink);
      font-size: 1.125rem;
      margin-bottom: 0.75rem;
      font-weight: 600;
    }

    .highlight-box p {
      color: var(--text);
      margin: 0;
    }

    .cta {
      background: var(--gray);
      padding: 2rem;
      border-radius: 12px;
      border: 1px solid var(--gray-light);
      margin-top: 3rem;
      opacity: 0;
    }

    .cta h3 {
      color: var(--text);
      font-size: 1.25rem;
      margin-bottom: 1rem;
    }

    .cta ul {
      list-style: none;
      margin: 1rem 0 1.5rem 0;
    }

    .cta li {
      color: var(--text-muted);
      padding-left: 1.5rem;
      margin-bottom: 0.75rem;
      position: relative;
    }

    .cta li::before {
      content: '✓';
      position: absolute;
      left: 0;
      color: var(--pink);
      font-weight: bold;
    }

    .cta-footer {
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    /* Decorative Elements */
    .gradient-orb {
      position: fixed;
      width: 500px;
      height: 500px;
      border-radius: 50%;
      background: radial-gradient(circle, var(--pink-dark), transparent 70%);
      filter: blur(80px);
      opacity: 0.15;
      pointer-events: none;
      z-index: -1;
      transition: opacity 0.3s ease;
    }

    body.light-mode .gradient-orb {
      opacity: 0.08;
    }

    .orb-1 { top: -250px; left: -250px; }
    .orb-2 { bottom: -250px; right: -250px; }

    @media (max-width: 1024px) {
      .container {
        grid-template-columns: 1fr;
        gap: 2rem;
      }

      header {
        position: relative;
        top: 0;
      }

      .hero h1 {
        font-size: 2rem;
      }
    }

    @media (max-width: 640px) {
      .theme-toggle {
        top: 1rem;
        right: 1rem;
        width: 44px;
        height: 44px;
        font-size: 1.25rem;
      }

      .container {
        padding: 2rem 1.5rem;
      }

      .hero h1 {
        font-size: 1.75rem;
      }

      .section h2 {
        font-size: 1.25rem;
      }
    }