:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --secondary: #10b981;
            --secondary-dark: #0d9668;
            --accent: #f59e0b;
            --dark: #1e293b;
            --darker: #0f172a;
            --light: #f8fafc;
            --gray: #64748b;
            --gradient: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            --gradient-dark: linear-gradient(135deg, var(--primary-dark) 0%, var(--secondary-dark) 100%);
        }
 body {
     background: var(--light);
     font-family: "Segoe UI", Roboto, sans-serif;
     color: var(--dark);
     line-height: 1.8;
     padding-top: 4rem;
 }

 .container {
     max-width: 950px;
 }

 .card {
     border-radius: 16px;
     border: none;
     background: white;
     box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
     padding: 2rem;
 }

 h1,
 h2 {
     color: var(--primary-dark);
     font-weight: 600;
     margin-top: 1.5rem;
 }

 h1 {
     background: var(--gradient);
     -webkit-background-clip: text;
     -webkit-text-fill-color: transparent;
     font-size: 2.4rem;
 }

 .section-icon {
     color: var(--primary);
     margin-right: .5rem;
 }

 .back-btn {
     margin-bottom: 2rem;
     background: var(--gradient);
     color: white;
     border: none;
     padding: .6rem 1.2rem;
     border-radius: 30px;
     font-weight: 500;
     box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
     transition: all .3s ease;
 }

 .back-btn:hover {
     background: var(--gradient-dark);
     transform: translateY(-2px);
     color: white;
 }