* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background: linear-gradient(135deg, #1a2a6c, #b21f1f, #fdbb2d);
            background-size: 400% 400%;
            animation: gradient 15s ease infinite;
            height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
        }

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

        main {
            width: 100%;
            max-width: 420px;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .card {
            background: rgba(255, 255, 255, 0.95);
            border-radius: 12px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
            padding: 40px 30px;
            width: 100%;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
        }

        .logo-container {
            text-align: center;
            margin-bottom: 20px;
        }

        .logo {
            height: 80px;
            width: auto;
            margin-bottom: 10px;
        }

        h2 {
            color: #2c3e50;
            text-align: center;
            margin-bottom: 30px;
            font-weight: 600;
            font-size: 28px;
            position: relative;
            padding-bottom: 15px;
        }

        h2:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background: linear-gradient(to right, #1a2a6c, #b21f1f);
            border-radius: 2px;
        }

        form {
            display: flex;
            flex-direction: column;
        }

        label {
            color: #34495e;
            margin-bottom: 8px;
            font-weight: 500;
            font-size: 14px;
        }

        input {
            padding: 14px 16px;
            margin-bottom: 24px;
            border: 1px solid #ddd;
            border-radius: 8px;
            font-size: 16px;
            transition: all 0.3s ease;
            background-color: #f9f9f9;
        }

        input:focus {
            outline: none;
            border-color: #1a2a6c;
            box-shadow: 0 0 0 3px rgba(26, 42, 108, 0.1);
            background-color: #fff;
        }

        button {
            background: linear-gradient(to right, #1a2a6c, #b21f1f);
            color: white;
            border: none;
            padding: 14px;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-top: 10px;
        }

        button:hover {
            background: linear-gradient(to right, #233a9c, #c92c2c);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }

        button:active {
            transform: translateY(0);
        }

        .error {
            color: #e74c3c;
            text-align: center;
            margin-top: 15px;
            padding: 10px;
            background-color: rgba(231, 76, 60, 0.1);
            border-radius: 6px;
            font-size: 14px;
            display: none;
        }

        .brand-text {
            text-align: center;
            margin-top: 5px;
        }

        .brand-name {
            font-size: 24px;
            font-weight: 700;
            background: linear-gradient(to right, #1a2a6c, #b21f1f);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 5px;
        }

        .brand-subtitle {
            font-size: 12px;
            color: #7f8c8d;
            letter-spacing: 1px;
        }

        /* Responsive Design */
        @media (max-width: 480px) {
            .card {
                padding: 30px 20px;
            }
            
            .logo {
                height: 70px;
            }
            
            h2 {
                font-size: 24px;
            }
            
            input, button {
                padding: 12px 14px;
            }
        }

        @media (max-width: 360px) {
            body {
                padding: 10px;
            }
            
            .card {
                padding: 25px 15px;
            }
            
            .logo {
                height: 60px;
            }
            
            h2 {
                font-size: 22px;
            }
        }

        /* Loading animation for button */
        .loading {
            position: relative;
            color: transparent;
        }

        .loading:after {
            content: '';
            position: absolute;
            width: 20px;
            height: 20px;
            top: 50%;
            left: 50%;
            margin: -10px 0 0 -10px;
            border: 2px solid #ffffff;
            border-radius: 50%;
            border-top-color: transparent;
            animation: spin 0.8s linear infinite;
        }

        @keyframes spin {
            to {
                transform: rotate(360deg);
            }
        }