.login-container {
    max-width: 400px;
    margin: 100px auto;
    padding: 20px;
    box-shadow: 0 0 20px rgba(76, 175, 80, 0.1);
    border-radius: 10px;
    background: white;
    border-top: 4px solid var(--main-green);
    border-left: 1px solid var(--main-gray);
    border-right: 1px solid var(--main-gray);
    border-bottom: 1px solid var(--main-gray);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    font-size: 24px;
    color: var(--main-green);
    margin-bottom: 10px;
}

.form-floating {
    margin-bottom: 16px;
}

.form-control:focus {
    border-color: var(--main-green);
    box-shadow: 0 0 0 0.25rem rgba(76, 175, 80, 0.25);
}

.btn-login {
    width: 100%;
    padding: 12px;
    font-size: 16px;
    background-color: var(--main-green);
    border-color: var(--main-green);
}

.btn-login:hover,
.btn-login:active,
.btn-login:focus {
    background-color: var(--hover-green) !important;
    border-color: var(--hover-green) !important;
}

.alert-danger {
    border-left: 4px solid #dc3545;
}