:root {
            --primary: #1E3A8A;       /* Royal Blue */
            --primary-light: #3b82f6;
            --secondary: #0284C7;     /* Sky Blue / Cyan */
            --accent: #E11D48;        /* Pink Red */
            --accent-hover: #be123c;
            --bg-color: #F1F5F9;      /* Alice Blue */
            --text-main: #020617;     /* Very Dark Navy */
            --text-light: #475569;
            --white: #ffffff;
            
            --shadow-sm: 0 4px 6px -1px rgba(30, 58, 138, 0.1);
            --shadow-lg: 0 20px 25px -5px rgba(30, 58, 138, 0.15);
            --shadow-card: 0 10px 15px -3px rgba(30, 58, 138, 0.08);
            --radius: 20px;
            --hero-bg: linear-gradient(135deg, #eff6ff 0%, #dbeafe 50%, #eff6ff 100%);
    --hero-shape-1: rgba(59, 130, 246, 0.4);
    --hero-shape-2: rgba(245, 158, 11, 0.2);
    --hero-shape-3: rgba(30, 64, 175, 0.15);
        }

         header {
 background: rgba(255, 255, 255, 0.9);        }
 .btn-primary { 
            background: var(--secondary); /* Sky Blue Button */
            color: var(--white); 
            border: none; 
            box-shadow: 0 4px 14px rgba(2, 132, 199, 0.3);
        }

        .subdomain-input-group {
            display: flex; align-items: center; background: var(--bg-body);
            border: 2px dashed #cbd5e1; border-radius: 12px; padding: 0.8rem 1rem;
        }