:root {
            --primary: #0078d7;
            --primary-dark: #0063b8;
            --bg-body: #f8fafc;
            --text-main: #0f172a;
            --text-muted: #64748b;
            --input-bg: #ffffff;
            --input-border: #e2e8f0;
            --radius: 12px;
        }

        * { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Inter', sans-serif; }

        body {
            height: 100vh;
            display: flex;
            background-color: var(--bg-body);
            overflow: hidden;
        }

        
        .visual-side {
            flex: 1.2;
            position: relative;
            background: linear-gradient(135deg, #001e3c 0%, #0078d7 100%);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            color: white;
            padding: 60px;
            overflow: hidden;
        }

        .brand-content { position: relative; z-index: 2; text-align: center; }

        .brand-icon {
            font-size: 5rem;
            margin-bottom: 20px;
            background: rgba(255, 255, 255, 0.1);
            width: 120px; height: 120px;
            display: flex; align-items: center; justify-content: center;
            border-radius: 30px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(10px);
            margin: 0 auto 20px auto;
        }

        .brand-content h1 { font-size: 2.5rem; font-weight: 800; letter-spacing: -1px; margin-bottom: 10px; }

        
        .form-side {
            flex: 1;
            background: white;
            display: flex;
            flex-direction: column;
            justify-content: center;
            padding: 80px;
            box-shadow: -10px 0 50px rgba(0,0,0,0.05);
            z-index: 5;
        }

        .header-area { margin-bottom: 40px; }
        .header-area h2 { font-size: 2rem; color: var(--text-main); font-weight: 700; margin-bottom: 8px; }
        .header-area p { color: var(--text-muted); line-height: 1.5; }

        .form-group { margin-bottom: 24px; }
        .form-group label {
            display: block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
            text-transform: uppercase;
        }

        .input-wrapper { position: relative; }
        .input-wrapper i {
            position: absolute;
            left: 16px; top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
        }

        .input-wrapper input {
            width: 100%;
            padding: 14px 16px 14px 48px;
            border: 2px solid var(--input-border);
            border-radius: var(--radius);
            font-size: 1rem;
            transition: all 0.3s ease;
        }

        .input-wrapper input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(0, 120, 215, 0.1);
        }

        .btn-submit {
            width: 100%;
            padding: 16px;
            background: var(--primary);
            color: white;
            border: none;
            border-radius: var(--radius);
            font-size: 1rem;
            font-weight: 700;
            text-transform: uppercase;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex; align-items: center; justify-content: center; gap: 10px;
        }

        .btn-submit:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 10px 20px rgba(0, 120, 215, 0.2);
        }

        .back-to-login {
            margin-top: 24px;
            text-align: center;
        }

        .back-to-login a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 0.9rem;
            font-weight: 500;
            transition: color 0.3s;
        }

        .back-to-login a:hover { color: var(--primary); }

        @media (max-width: 1024px) {
            .visual-side { display: none; }
            .form-side { flex: 1; padding: 40px; }
        }

        
        .alert {
            padding: 14px;
            border-radius: var(--radius);
            margin-bottom: 20px;
            font-size: 0.9rem;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .alert-error { background: #fee2e2; border: 1px solid #fca5a5; color: #dc2626; }

        
        .message { display: inline-block; margin-top: 12px; padding: 14px; border-radius: var(--radius); font-weight: 600; }
        .message.error { background: #fee2e2; border: 1px solid #fca5a5; color: #dc2626; }