body {
            font-family: 'Cairo', sans-serif;
            margin: 0;
            height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;

            /* خلفية متحركة */
            background: linear-gradient(135deg, #8d121d, #9f4b52, #002d5c);
            background-size: 300% 300%;
            animation: gradientMove 10s ease infinite;
        }

        @keyframes gradientMove {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }

        .login-container {
            width: 90%;
            max-width: 420px;
            padding: 35px;
            border-radius: 18px;

            /* Glass effect */
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.2);

            text-align: center;
            color: #fff;
            box-shadow: 0 8px 25px rgba(0,0,0,0.25);
            animation: fadeIn 1.1s ease;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }

        h2 {
            margin-bottom: 25px;
            font-size: 26px;
            font-weight: 600;
        }

        input {
            /* width: 100%; */
            padding: 13px;
            margin: 12px 0;
            border-radius: 10px;
            border: none;
            font-size: 16px;

            background: rgba(255,255,255,0.85);
            color: #00315b;
        }

        input:focus {
            outline: none;
            border: 2px solid #0077ff;
        }

        button {
            width: 100%;
            padding: 14px;
            background: #ffcc00;
            color: #00315b;
            border: none;
            border-radius: 10px;
            font-size: 18px;
            font-weight: 600;
            cursor: pointer;
            transition: 0.25s;
        }

        button:hover {
            background: #ffdb4d;
            transform: scale(1.03);
        }

        .error {
            background: rgba(255, 0, 0, 0.2);
            padding: 10px;
            border-radius: 8px;
            margin-bottom: 15px;
        }

        @media (max-width: 480px) {
            h2 { font-size: 22px; }
            .login-container { padding: 25px; }
        }