.signup-container {
    max-width: 450px;
    margin: 100px auto; 
    padding: 40px;
    background: rgba(14, 28, 42, 0.8);
    border: 1px solid rgba(52, 152, 219, 0.3); 
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5), 0 0 20px rgba(52, 152, 219, 0.1);
    text-align: center;
}

.signup-container h2 {
    font-family: 'Montserrat', sans-serif;
    color: #fff;
    font-size: 2rem;
    margin-bottom: 30px;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-shadow: 0 0 10px rgba(52, 152, 219, 0.5);
}

.signup-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.signup-form input {
    width: 100%;
    padding: 15px 20px;
    background: rgba(255, 255, 255, 0.05); 
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    color: #fff;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    transition: all 0.3s ease;
    outline: none;
}

.signup-form input:focus {
    background: rgba(52, 152, 219, 0.1);
    border-color: #3498db;
    box-shadow: 0 0 15px rgba(52, 152, 219, 0.3);
}

.signup-form input::placeholder {
    color: #94a3b8;
}

.signup-form button {
    margin-top: 10px;
    cursor: pointer;
    border: none;
    font-size: 1.1rem;
    padding: 15px;
    letter-spacing: 1px;
    text-transform: uppercase;
    font-weight: 600;
}

@media (max-width: 480px) {
    .signup-container {
        margin: 50px 20px;
        padding: 30px 20px;
    }
}