/* ============ AUTH GUARD - Login overlay ============ */
.auth-overlay {
    position: fixed;
    inset: 0;
    z-index: 99999;
    background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.auth-overlay.hidden { display: none; }

.auth-card {
    background: white;
    border-radius: 20px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.4);
    text-align: center;
}
.auth-card .icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}
.auth-card h2 {
    color: #0F172A;
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}
.auth-card p {
    color: #64748B;
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}
.auth-card .field {
    text-align: left;
    margin-bottom: 1rem;
}
.auth-card .field label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: #475569;
    margin-bottom: 6px;
}
.auth-card .field input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #E2E8F0;
    border-radius: 10px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s;
}
.auth-card .field input:focus {
    outline: none;
    border-color: #D4AF37;
}
.auth-card .btn-login {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #0F172A, #1E293B);
    color: #FFD700;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.25s;
    margin-top: 0.5rem;
}
.auth-card .btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(15, 23, 42, 0.3);
}
.auth-card .error {
    color: #F44336;
    font-size: 0.85rem;
    margin-top: 1rem;
    min-height: 20px;
}