/* ===== RESET & BASE ===== */
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    :root {
      --bg-primary: #0a0e1a;
      --bg-secondary: #111827;
      --bg-tertiary: #1a1f35;
      --text-primary: #f8fafc;
      --text-secondary: #94a3b8;
      --text-muted: #64748b;
      --brand-blue: #3b82f6;
      --brand-cyan: #06b6d4;
      --brand-purple: #8b5cf6;
      --accent-orange: #f97316;
      --success-green: #10b981;
      --error-red: #ef4444;
      --gradient-primary: linear-gradient(135deg, #3b82f6, #06b6d4);
      --gradient-accent: linear-gradient(135deg, #8b5cf6, #ec4899);
      --space-xs: 0.5rem;
      --space-sm: 1rem;
      --space-md: 1.5rem;
      --space-lg: 2rem;
      --space-xl: 3rem;
      --space-2xl: 4rem;
      --radius-sm: 0.5rem;
      --radius-md: 0.75rem;
      --radius-lg: 1rem;
      --radius-xl: 1.5rem;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
      --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
      --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
      --transition-fast: 150ms ease;
      --transition-base: 250ms ease;
      --transition-slow: 350ms ease;
    }

    html {
      scroll-behavior: smooth;
      color-scheme: dark;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
      background: var(--bg-primary);
      color: var(--text-primary);
      line-height: 1.6;
      overflow-x: hidden;
    }

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

    :focus-visible {
      outline: 2px solid var(--brand-blue);
      outline-offset: 3px;
      border-radius: var(--radius-sm);
    }

    /* ===== HEADER ===== */
    .header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(10, 14, 26, 0.8);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .nav-container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 var(--space-md);
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: var(--space-sm);
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-primary);
      text-decoration: none;
      transition: opacity var(--transition-fast);
    }

    .logo:hover {
      opacity: 0.8;
    }

    .logo-icon {
      width: 36px;
      height: 36px;
      background: var(--gradient-primary);
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
    }

    .back-link {
      color: var(--text-secondary);
      text-decoration: none;
      display: flex;
      align-items: center;
      gap: var(--space-xs);
      font-weight: 500;
      transition: color var(--transition-fast);
    }

    .back-link:hover {
      color: var(--brand-blue);
    }

    /* ===== HERO ===== */
    .hero {
      max-width: 1280px;
      margin: 0 auto;
      padding: var(--space-2xl) var(--space-md);
      text-align: center;
    }

    .hero h1 {
      font-size: clamp(2rem, 5vw, 3.5rem);
      font-weight: 800;
      margin-bottom: var(--space-md);
    }

    .gradient-text {
      background: var(--gradient-primary);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .hero-description {
      font-size: 1.25rem;
      color: var(--text-secondary);
      max-width: 600px;
      margin: 0 auto var(--space-xl);
    }

    /* ===== WIP NOTICE ===== */
    .wip-notice {
      display: flex;
      align-items: center;
      gap: 1.25rem;
      max-width: 900px;
      margin: 2rem auto 3rem;
      padding: 1.75rem 2rem;
      border-radius: 16px;
      background: linear-gradient(135deg, rgba(255, 184, 0, 0.15), rgba(255, 140, 0, 0.15));
      border: 1px solid rgba(255, 184, 0, 0.35);
    }

    .wip-icon {
      flex-shrink: 0;
      color: #ffb800;
    }

    .wip-content h2 {
      margin: 0 0 0.4rem;
      font-size: 1.35rem;
      font-weight: 600;
    }

    .wip-content p {
      margin: 0 0 0.75rem;
      color: #d1d5db;
      line-height: 1.5;
    }

    .wip-email {
      display: inline-block;
      font-weight: 500;
      color: #ffb800;
      text-decoration: none;
    }

    .wip-email:hover {
      text-decoration: underline;
    }

    /* ===== SEARCH ===== */
    .search-section {
      max-width: 700px;
      margin: 0 auto var(--space-2xl);
      padding: 0 var(--space-md);
    }

    .search-container {
      position: relative;
    }

    .search-icon {
      position: absolute;
      left: var(--space-md);
      top: 50%;
      transform: translateY(-50%);
      color: var(--text-muted);
      pointer-events: none;
    }

    .search-input {
      width: 100%;
      padding: 1rem 1rem 1rem 3rem;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-lg);
      color: var(--text-primary);
      font-size: 1rem;
      transition: all var(--transition-base);
    }

    .search-input:focus {
      outline: none;
      border-color: var(--brand-blue);
      background: rgba(255, 255, 255, 0.08);
      box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    }

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

    /* ===== MAIN CONTENT ===== */
    .main-content {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 var(--space-md) var(--space-2xl);
    }

    .categories-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: var(--space-lg);
      margin-bottom: var(--space-2xl);
    }

    .category-card {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-lg);
      padding: var(--space-lg);
      transition: all var(--transition-base);
    }

    .category-card:hover {
      transform: translateY(-4px);
      border-color: rgba(59, 130, 246, 0.3);
      box-shadow: var(--shadow-lg);
    }

    .category-header {
      display: flex;
      align-items: center;
      gap: var(--space-sm);
      margin-bottom: var(--space-md);
    }

    .category-icon {
      width: 48px;
      height: 48px;
      background: rgba(59, 130, 246, 0.1);
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--brand-blue);
      flex-shrink: 0;
    }

    .category-card h2 {
      font-size: 1.25rem;
      margin: 0;
    }

    .articles-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: var(--space-sm);
    }

    .article-link {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: var(--space-sm);
      color: var(--text-secondary);
      text-decoration: none;
      border-radius: var(--radius-sm);
      transition: all var(--transition-fast);
    }

    .article-link:hover {
      background: rgba(255, 255, 255, 0.05);
      color: var(--text-primary);
      padding-left: var(--space-md);
    }

    .article-link svg {
      flex-shrink: 0;
      opacity: 0;
      transition: opacity var(--transition-fast);
    }

    .article-link:hover svg {
      opacity: 1;
    }

    .no-results {
      text-align: center;
      padding: var(--space-2xl);
      color: var(--text-muted);
    }

    .no-results-icon {
      width: 64px;
      height: 64px;
      margin: 0 auto var(--space-md);
      color: var(--text-muted);
      opacity: 0.5;
    }

    .hidden {
      display: none !important;
    }

    /* ===== CONTACT FORM ===== */
    .contact-box {
      max-width: 800px;
      margin: var(--space-2xl) auto 0;
      background: rgba(59, 130, 246, 0.05);
      border: 1px solid rgba(59, 130, 246, 0.2);
      border-radius: var(--radius-xl);
      padding: var(--space-xl);
    }

    .contact-icon {
      width: 56px;
      height: 56px;
      background: rgba(59, 130, 246, 0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto var(--space-md);
      color: var(--brand-blue);
    }

    .contact-box h3 {
      font-size: 1.5rem;
      margin-bottom: var(--space-sm);
      text-align: center;
    }

    .contact-box > p {
      color: var(--text-secondary);
      margin-bottom: var(--space-lg);
      text-align: center;
    }

    .contact-form {
      display: flex;
      flex-direction: column;
      gap: var(--space-md);
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: var(--space-xs);
    }

    .form-group label {
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-primary);
    }

    .form-group input,
    .form-group textarea {
      width: 100%;
      padding: 0.875rem 1rem;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      color: var(--text-primary);
      font-size: 1rem;
      font-family: inherit;
      transition: all var(--transition-base);
    }

    .form-group input:focus,
    .form-group textarea:focus {
      outline: none;
      border-color: var(--brand-blue);
      background: rgba(255, 255, 255, 0.08);
      box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    }

    .form-group input::placeholder,
    .form-group textarea::placeholder {
      color: var(--text-muted);
    }

    .form-group textarea {
      min-height: 120px;
      resize: vertical;
    }

    .form-error {
      font-size: 0.875rem;
      color: var(--error-red);
      display: none;
    }

    .form-group.error input,
    .form-group.error textarea {
      border-color: var(--error-red);
    }

    .form-group.error .form-error {
      display: block;
    }

    .recaptcha-wrapper {
      display: flex;
      justify-content: center;
      margin: var(--space-sm) 0;
    }

    .submit-btn {
      padding: 1rem 2rem;
      background: var(--gradient-primary);
      color: white;
      border: none;
      border-radius: var(--radius-md);
      font-size: 1rem;
      font-weight: 600;
      cursor: pointer;
      transition: all var(--transition-base);
      display: flex;
      align-items: center;
      justify-content: center;
      gap: var(--space-xs);
    }

    .submit-btn:hover:not(:disabled) {
      transform: translateY(-2px);
      box-shadow: 0 12px 24px rgba(59, 130, 246, 0.4);
    }

    .submit-btn:disabled {
      opacity: 0.5;
      cursor: not-allowed;
    }

    .submit-btn svg {
      width: 20px;
      height: 20px;
    }

    .form-message {
      padding: var(--space-md);
      border-radius: var(--radius-md);
      text-align: center;
      font-weight: 500;
      display: none;
    }

    .form-message.success {
      background: rgba(16, 185, 129, 0.1);
      border: 1px solid rgba(16, 185, 129, 0.3);
      color: var(--success-green);
      display: block;
    }

    .form-message.error {
      background: rgba(239, 68, 68, 0.1);
      border: 1px solid rgba(239, 68, 68, 0.3);
      color: var(--error-red);
      display: block;
    }

    .alternative-contact {
      margin-top: var(--space-lg);
      padding-top: var(--space-lg);
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      text-align: center;
    }

    .alternative-contact p {
      color: var(--text-muted);
      font-size: 0.875rem;
      margin-bottom: var(--space-sm);
    }

    .contact-links {
      display: flex;
      gap: var(--space-md);
      justify-content: center;
      flex-wrap: wrap;
    }

    .contact-link {
      display: inline-flex;
      align-items: center;
      gap: var(--space-xs);
      padding: 0.625rem 1.25rem;
      background: rgba(255, 255, 255, 0.05);
      color: var(--text-primary);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      text-decoration: none;
      font-size: 0.875rem;
      font-weight: 500;
      transition: all var(--transition-fast);
    }

    .contact-link:hover {
      background: rgba(255, 255, 255, 0.1);
      transform: translateY(-2px);
    }

    .contact-link svg {
      width: 16px;
      height: 16px;
    }

    /* ===== FOOTER ===== */
    .site-footer {
      margin-top: auto;
      padding: 80px 0 40px;
      background: linear-gradient(to bottom, transparent, rgba(110, 168, 255, 0.02));
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      position: relative;
    }

    .site-footer::before {
      content: '';
      position: absolute;
      top: -1px;
      left: 50%;
      transform: translateX(-50%);
      width: 30%;
      height: 1px;
      background: linear-gradient(90deg, transparent, var(--brand-blue), transparent);
      filter: blur(1px);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 2fr;
      gap: 60px;
      margin-bottom: 60px;
      max-width: 1100px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .footer-brand .brand {
      display: flex;
      align-items: center;
      gap: var(--space-sm);
      margin-bottom: 16px;
      text-decoration: none;
      color: var(--text-primary);
    }

    .footer-brand .logo {
      width: 32px;
      height: 32px;
      background: var(--gradient-primary);
      border-radius: var(--radius-sm);
    }

    .footer-tagline {
      color: var(--text-muted);
      font-size: 14px;
      margin: 15px 0 25px;
      max-width: 300px;
      line-height: 1.6;
    }

    .footer-links-group {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .footer-label {
      display: block;
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.1em;
      color: var(--text-primary);
      margin-bottom: 20px;
    }

    .footer-col a {
      display: block;
      color: var(--text-muted);
      text-decoration: none;
      font-size: 14px;
      margin-bottom: 12px;
      transition: color 0.2s ease;
    }

    .footer-col a:hover {
      color: var(--brand-blue);
    }

    .footer-bottom {
      padding-top: 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      color: var(--text-muted);
      font-size: 13px;
      max-width: 1100px;
      margin: 0 auto;
      padding: 30px 24px 0;
      text-align: center;
    }

    /* ===== RESPONSIVE ===== */
    @media (max-width: 768px) {
      .categories-grid {
        grid-template-columns: 1fr;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }

      .footer-links-group {
        grid-template-columns: 1fr;
      }

      .contact-links {
        flex-direction: column;
        align-items: stretch;
      }

      .contact-link {
        justify-content: center;
      }
    }