body {
    background: url("../visits/images/bg.jpg") no-repeat center center fixed;
    background-size: cover;
    font-family: "IRANSans", sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

/* Subtle dark overlay */
body::before {
    content: "";
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 0;
}

.login-card {
    position: relative;
    z-index: 1;
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 16px;
    padding: 2rem;
    max-width: 400px;
    width: 100%;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.login-card h4 {
    color: #fff;
    text-align: center;
    margin-bottom: 1.5rem;
}

label {
    color: #e0e0e0;
    font-size: 0.9rem;
}

.form-control {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    color: #fff;
}

.form-control:focus {
    background: rgba(255, 255, 255, 0.2);
    border-color: #4dd0e1;
    box-shadow: 0 0 0 0.2rem rgba(77, 208, 225, 0.3);
}

.btn-primary {
    background-color: #4dd0e1;
    border: none;
    transition: all 0.3s ease;
    font-weight: bold;
}

.btn-primary:hover {
    background-color: #26c6da;
    transform: translateY(-2px);
}

.alert {
    font-size: 0.85rem;
    border-radius: 8px;
}