/* ============================================
   HEADER - CLEAN MODERN NAVIGATION
   Grey + Subtle Sunrise Orange
   ============================================ */

/* Header */
    .header {
      background: var(--white);
      border-bottom: 1px solid var(--grey-200);
      position: sticky;
      top: 0;
      z-index: 1000;
    }

    .header-container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 20px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 48px;
    }

    /* Logo - Simple Text */
    .logo {
      display: flex;
      align-items: baseline;
      gap: 8px;
      text-decoration: none;
      transition: opacity 0.2s ease;
    }

    .logo:hover {
      opacity: 0.8;
    }

    .logo-text {
      font-size: 22px;
      font-weight: 600;
      color: var(--grey-900);
      letter-spacing: -0.02em;
    }

    .logo-tagline {
      font-size: 14px;
      font-weight: 400;
      color: var(--grey-400);
    }

    /* Navigation - Clean Links */
    .nav {
      display: flex;
      align-items: center;
      gap: 32px;
      flex: 1;
    }

    .nav-link {
      color: var(--grey-600);
      text-decoration: none;
      font-size: 15px;
      font-weight: 500;
      padding: 8px 0;
      transition: color 0.2s ease;
      position: relative;
    }

    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--orange-500);
      transition: width 0.3s ease;
    }

    .nav-link:hover {
      color: var(--grey-900);
    }

    .nav-link:hover::after {
      width: 100%;
    }

    /* Header Actions */
    .header-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    /* Phone Link - Subtle */
    .phone-link {
      display: flex;
      align-items: center;
      gap: 8px;
      color: var(--grey-600);
      text-decoration: none;
      font-size: 15px;
      font-weight: 500;
      padding: 10px 16px;
      border-radius: 8px;
      transition: all 0.2s ease;
    }

    .phone-link:hover {
      background: var(--grey-100);
      color: var(--grey-900);
    }

    .phone-icon {
      width: 18px;
      height: 18px;
    }

    /* Primary CTA - Subtle Orange */
    .btn-primary {
      background: var(--orange-500);
      color: var(--white);
      padding: 10px 20px;
      border-radius: 8px;
      font-size: 15px;
      font-weight: 600;
      text-decoration: none;
      border: none;
      cursor: pointer;
      transition: all 0.2s ease;
    }

    .btn-primary:hover {
      background: #E55536;
      transform: translateY(-1px);
    }

    /* Mobile Menu Toggle */
    .mobile-menu-toggle {
      display: none;
      background: transparent;
      border: none;
      cursor: pointer;
      padding: 8px;
      color: var(--grey-900);
    }

    /* Responsive */
    @media (max-width: 768px) {
      .header-container {
        padding: 16px 20px;
      }

      .nav {
        display: none;
      }

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

      .phone-link {
        display: none;
      }

      .logo-tagline {
        display: none;
      }
    }

    /* Demo Section */
    .demo-section {
      max-width: 800px;
      margin: 80px auto;
      padding: 0 24px;
      text-align: center;
    }

    .demo-title {
      font-size: 48px;
      font-weight: 600;
      color: var(--grey-900);
      margin-bottom: 16px;
      letter-spacing: -0.02em;
    }

    .demo-subtitle {
      font-size: 18px;
      color: var(--grey-600);
      line-height: 1.6;
      margin-bottom: 48px;
    }

    .color-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
      gap: 24px;
      margin-top: 48px;
      padding: 32px;
      background: var(--white);
      border-radius: 12px;
      border: 1px solid var(--grey-200);
    }

    .color-item {
      text-align: center;
    }

    .color-swatch {
      width: 100%;
      height: 80px;
      border-radius: 8px;
      margin-bottom: 12px;
      border: 1px solid var(--grey-200);
    }

    .color-label {
      font-size: 13px;
      color: var(--grey-600);
      font-weight: 500;
    }

    .color-hex {
      font-size: 11px;
      color: var(--grey-400);
      font-family: monospace;
      margin-top: 4px;
    }

    .design-principle {
      margin-top: 48px;
      padding: 24px;
      background: var(--orange-50);
      border-radius: 12px;
      border-left: 4px solid var(--orange-500);
    }

    .design-principle h3 {
      color: var(--grey-900);
      font-size: 18px;
      margin-bottom: 12px;
    }

    .design-principle ul {
      text-align: left;
      color: var(--grey-600);
      line-height: 1.8;
      list-style-position: inside;
    }