body {
    background: linear-gradient(135deg, #f7f7f7 0%, #e2e2e2 100%);
    color: #333;
    font-family: 'Roboto', sans-serif;
    margin: 0;
    padding: 0;
}

.d-none {
    display: none !important;
}

.login-box {
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    margin-top: 3rem;
    max-width: 400px;
    padding: 2rem;
    width: 100%;
}

.login-button {
    background-color: #007bff;
    border-color: #007bff;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: 500;
    padding: 0.75rem;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

    .login-button:disabled {
        background-color: #6c757d;
        border-color: #6c757d;
        cursor: not-allowed;
    }

    .login-button:hover {
        background-color: #0056b3;
        border-color: #0056b3;
        box-shadow: 0 8px 20px rgba(0,0,0,0.1);
    }

.login-container {
    min-height: 100vh;
}

.login-form .form-label {
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.login-heading {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-align: center;
}

.login-input {
    border: 1px solid #dee2e6;
    border-radius: 5px;
    font-size: 1rem;
    height: 45px;
    padding: 0.5rem 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

    .login-input:focus {
        border-color: #007bff;
        box-shadow: 0 0 0 0.2rem rgba(0,123,255,0.25);
        outline: none;
    }

.spinner {
    animation: spinner 0.6s linear infinite;
    border: 0.3rem solid rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    border-top-color: #007bff;
    display: inline-block;
    height: 2rem;
    width: 2rem;
}

.text-danger {
    font-size: 0.85rem;
    line-height: 1.2rem;
}

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