.auth-shell {
    min-height: calc(100vh - 160px);
    display: flex;
    align-items: center;
    padding: 40px 0 60px;
    background: linear-gradient(180deg, #f8fbff 0%, #ffffff 100%);
}
.auth-card {
    max-width: 440px;
    margin: 0 auto;
    border: 0;
    border-radius: 20px;
    box-shadow: 0 16px 50px rgba(11, 102, 193, 0.12);
}
.auth-card .card-body {
    padding: 2.25rem;
}
.auth-brand {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 0.25rem;
}
.auth-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    border-radius: 12px;
    padding: 12px 16px;
    font-weight: 600;
}
.auth-google {
    background: #fff;
    border: 1px solid #d1d5db;
    color: #111827;
}
.auth-apple {
    background: #111827;
    border: 0;
    color: #fff;
}
.auth-apple:hover {
    color: #fff;
    background: #000;
}
.auth-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    color: #9ca3af;
    font-size: 0.85rem;
    margin: 1.25rem 0;
}
.auth-divider::before,
.auth-divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: #e5e7eb;
}
.otp-inputs {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin: 20px 0;
}
.otp-inputs input {
    width: 46px;
    height: 54px;
    text-align: center;
    font-size: 1.4rem;
    font-weight: 700;
    border-radius: 10px;
    border: 1px solid #d1d5db;
}
@media (max-width: 575px) {
    .otp-inputs input {
        width: 40px;
        height: 48px;
    }
    .auth-card .card-body {
        padding: 1.5rem;
    }
}