:root {
      --bg-dark: #0d1117;
      --bg-surface: #161b22;
      --bg-card: #21262d;
      --bg-input: #0d1117;
      --fg-primary: #f0f6fc;
      --fg-secondary: #8b949e;
      --fg-muted: #6e7681;
      --border: #30363d;
      --border-focus: #58a6ff;
      --accent-green: #3fb950;
      --accent-blue: #58a6ff;
      --font-mono: 'SF Mono', 'JetBrains Mono', 'IBM Plex Mono', ui-monospace, Menlo, monospace;
      --font-sans: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', system-ui, sans-serif;
    }

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

    body {
      font-family: var(--font-sans);
      background: var(--bg-dark);
      color: var(--fg-primary);
      line-height: 1.6;
      overflow-x: hidden;
    }

    /* Navigation */
    nav {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
      background: rgba(13, 17, 23, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border);
      padding: 16px 24px;
    }

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

    .nav-brand {
      font-family: var(--font-mono);
      font-size: 20px;
      font-weight: 700;
      color: var(--fg-primary);
      text-decoration: none;
      letter-spacing: -0.02em;
    }

    .nav-brand span { color: var(--accent-green); }

    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }

    .nav-links a {
      color: var(--fg-secondary);
      text-decoration: none;
      font-size: 14px;
      font-weight: 500;
      transition: color 0.2s;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--fg-primary);
    }

    .nav-cta {
      background: var(--accent-green);
      color: var(--bg-dark) !important;
      padding: 8px 20px;
      border-radius: 6px;
      font-weight: 600 !important;
    }

    .nav-cta:hover {
      background: #2ea043;
    }

    /* Hero Section */
    .hero {
      min-height: 50vh;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 120px 24px 60px;
      text-align: center;
    }

    .hero-content {
      max-width: 800px;
    }

    .hero h1 {
      font-size: clamp(32px, 5vw, 48px);
      font-weight: 700;
      letter-spacing: -0.03em;
      margin-bottom: 20px;
      line-height: 1.2;
    }

    .hero h1 .accent {
      background: linear-gradient(135deg, var(--accent-green), var(--accent-blue));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .hero-subtitle {
      font-size: clamp(16px, 2vw, 18px);
      color: var(--fg-secondary);
      max-width: 600px;
      margin: 0 auto;
    }

    /* Contact Section */
    .contact-section {
      padding: 60px 24px 100px;
    }

    .contact-container {
      max-width: 1200px;
      margin: 0 auto;
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 60px;
      align-items: start;
    }

    /* Info Cards */
    .info-section {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    .info-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 24px;
    }

    .info-card h3 {
      font-size: 16px;
      font-weight: 600;
      margin-bottom: 12px;
      color: var(--fg-primary);
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .info-card h3 .icon {
      font-size: 20px;
    }

    .info-card p {
      color: var(--fg-secondary);
      font-size: 14px;
      line-height: 1.7;
    }

    .info-card a {
      color: var(--accent-blue);
      text-decoration: none;
    }

    .info-card a:hover {
      text-decoration: underline;
    }

    /* Contact Form */
    .form-section {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: 16px;
      padding: 40px;
    }

    .form-section h2 {
      font-size: 24px;
      font-weight: 600;
      margin-bottom: 8px;
    }

    .form-section p {
      color: var(--fg-secondary);
      font-size: 14px;
      margin-bottom: 32px;
    }

    .form-group {
      margin-bottom: 24px;
    }

    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 500;
      margin-bottom: 8px;
      color: var(--fg-primary);
    }

    .form-group label .required {
      color: var(--accent-red);
      margin-left: 2px;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
      width: 100%;
      padding: 12px 16px;
      background: var(--bg-input);
      border: 1px solid var(--border);
      border-radius: 8px;
      color: var(--fg-primary);
      font-size: 15px;
      font-family: var(--font-sans);
      transition: border-color 0.3s, box-shadow 0.3s;
    }

    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      outline: none;
      border-color: var(--border-focus);
      box-shadow: 0 0 0 3px rgba(79, 139, 255, 0.1);
    }

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

    .form-group select {
      cursor: pointer;
      appearance: none;
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%238b949e' viewBox='0 0 16 16'%3E%3Cpath d='M4 6l4 4 4-4'/%3E%3C/svg%3E");
      background-repeat: no-repeat;
      background-position: right 12px center;
      padding-right: 40px;
    }

    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .form-submit {
      margin-top: 32px;
    }

    .btn-submit {
      width: 100%;
      padding: 14px 24px;
      background: var(--accent-green);
      color: var(--bg-dark);
      border: none;
      border-radius: 8px;
      font-size: 16px;
      font-weight: 600;
      cursor: pointer;
      transition: background 0.3s, transform 0.2s;
    }

    .btn-submit:hover {
      background: #2ea043;
      transform: translateY(-2px);
    }

    .form-footer {
      margin-top: 16px;
      text-align: center;
      font-size: 13px;
      color: var(--fg-muted);
    }

    /* Solutions Tags */
    .solutions-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 20px;
    }

    .solution-tag {
      padding: 6px 14px;
      background: rgba(63, 185, 80, 0.1);
      border: 1px solid rgba(63, 185, 80, 0.2);
      border-radius: 20px;
      font-size: 13px;
      color: var(--accent-green);
      cursor: pointer;
      transition: all 0.3s;
    }

    .solution-tag:hover,
    .solution-tag.active {
      background: rgba(63, 185, 80, 0.2);
      border-color: var(--accent-green);
    }

    /* Locations */
    .locations-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .location-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: var(--fg-secondary);
    }

    .location-item .dot {
      width: 8px;
      height: 8px;
      background: var(--accent-green);
      border-radius: 50%;
    }

    /* Success Message */
    .success-message {
      display: none;
      text-align: center;
      padding: 40px;
    }

    .success-message.show {
      display: block;
    }

    .success-icon {
      width: 64px;
      height: 64px;
      background: rgba(63, 185, 80, 0.15);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 20px;
      font-size: 32px;
    }

    .success-message h3 {
      font-size: 20px;
      margin-bottom: 8px;
    }

    .success-message p {
      color: var(--fg-secondary);
      font-size: 14px;
    }

    /* Footer */
    footer {
      border-top: 1px solid var(--border);
      padding: 40px 24px;
      text-align: center;
    }

    footer p {
      color: var(--fg-muted);
      font-size: 14px;
    }

    /* Mobile Menu */
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      color: var(--fg-primary);
      font-size: 24px;
      cursor: pointer;
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .contact-container {
        grid-template-columns: 1fr;
        gap: 40px;
      }

      .info-section {
        order: 2;
      }

      .form-section {
        order: 1;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }

      .mobile-menu-btn {
        display: block;
      }

      .form-row {
        grid-template-columns: 1fr;
      }

      .form-section {
        padding: 24px;
      }
    }