body {
    background-color: #0d1117;
    font-family: 'Poppins', sans-serif;
    margin: 0;
}

.login-card {
    background-color: #161b22;
    border: 1px solid #30363d;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    padding: 2.5rem;
    max-width: 420px;
    margin: auto;
}

.custom-input-group .input-group-text {
    background-color: #0d1117;
    border: 1px solid #30363d;
    border-right: none;
    color: #6e7681;
    border-top-left-radius: 10px;
    border-bottom-left-radius: 10px;
    transition: border-color 0.3s, color 0.3s;
}

.custom-input-group .form-control {
    background-color: #0d1117;
    border: 1px solid #30363d;
    border-left: none;
    color: #e6edf3;
    border-top-right-radius: 10px;
    border-bottom-right-radius: 10px;
    padding: 12px 15px;
    transition: border-color 0.3s;
}

.custom-input-group .form-control::placeholder {
    color: #6e7681;
}

.custom-input-group .form-control:focus {
    box-shadow: none;
    background-color: #0d1117;
    color: #e6edf3;
}

.custom-input-group:focus-within {
    box-shadow: 0 0 0 0.25rem rgba(0, 198, 255, 0.25);
    border-radius: 10px;
}

.custom-input-group:focus-within .input-group-text,
.custom-input-group:focus-within .form-control {
    border-color: #00c6ff;
    color: #00c6ff; 
}

.btn-login {
    background: linear-gradient(45deg, #00c6ff, #0072ff);
    border: none;
    color: white;
    font-weight: bold;
    padding: 12px;
    border-radius: 50px;
    font-size: 1.1rem;
    transition: transform 0.3s, box-shadow 0.3s;
    width: 100%;
}

.btn-login:hover {
    transform: scale(1.02);
    box-shadow: 0 5px 15px rgba(0, 198, 255, 0.4);
    color: white;
}

.alert-custom {
    background-color: rgba(220, 53, 69, 0.1);
    border: 1px solid #dc3545;
    color: #ff6b72;
    border-radius: 10px;
    font-size: 0.9rem;
}

@media (max-width: 576px) {
    .login-card {
        padding: 2rem 1.5rem;
    }
}