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

body {
    min-height: 100vh;
    background: linear-gradient(135deg, #6b48ff, #00ddeb);
    display: flex;
    justify-content: center;
    align-items: center;
}

@keyframes fadeIn {
    0% { opacity: 0; transform: translateY(-20px); }
    100% { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

.container {
    background: rgba(255, 255, 255, 0.98);
    border-radius: 20px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.25);
    animation: fadeIn 0.8s ease-in-out;
}

h2 {
    color: #2d2d2d;
    font-size: 28px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 25px;
}

button, input[type="submit"] {
    background: linear-gradient(90deg, #6b48ff, #5a3cff);
    border: none;
    border-radius: 10px;
    color: white;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 12px;
}

button:hover, input[type="submit"]:hover {
    background: linear-gradient(90deg, #5439cc, #4a2ecc);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(84, 57, 204, 0.4);
}

button:active, input[type="submit"]:active {
    transform: translateY(0);
}

.error {
    color: #ff4d4d;
    font-size: 14px;
    text-align: center;
    margin-bottom: 15px;
    font-weight: 500;
}

@media (max-width: 480px) {
    .container {
        margin: 20px;
        padding: 25px;
    }

    h2 {
        font-size: 24px;
    }
}