.login-container {
    max-width: 420px;
    margin: 2rem auto;
    padding: 2rem;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.48) 0%, rgba(236, 241, 229, 0.95) 100%);
    border: 1px solid rgba(73, 90, 70, 0.22);
    border-radius: 0;
    box-shadow:
        inset -1px -1px 0 rgba(255, 255, 255, 0.95),
        inset 1px 1px 0 rgba(60, 84, 51, 0.26),
        inset -2px -2px 0 rgba(101, 121, 88, 0.32),
        inset 2px 2px 0 rgba(255, 255, 255, 0.88),
        0 14px 28px rgba(20, 34, 28, 0.08);
}

.btn-custom {
    background: linear-gradient(180deg, #45617c 0%, #2c3e50 100%);
    color: white;
    border: 1px solid #17252f;
    border-radius: 4px;
    transition: background-color 120ms ease, border-color 120ms ease, box-shadow 120ms ease;
    box-shadow:
        inset 1px 1px 0 rgba(255, 255, 255, 0.18),
        inset -1px -1px 0 rgba(17, 26, 33, 0.32);
}

.btn-custom:hover {
    background: linear-gradient(180deg, #53728e 0%, #33485b 100%);
    color: white;
    transform: none;
}

.alert-login {
    margin-top: 1rem;
    background-color: #f5e1bc;
    border: 1px solid rgba(89, 62, 15, 0.18);
    color: #593e0f;
    border-radius: 0;
    box-shadow:
        inset 1px 1px 0 rgba(255, 255, 255, 0.6),
        inset -1px -1px 0 rgba(89, 62, 15, 0.12);
}