/*
 * Sign-in screens (login, magic-link landing): centred card on the portal page background.
 * Built on tn-tokens.css; load that first.
 */

.tn-auth {
    position: relative;
    min-height: 100vh;
    width: 100%;
    box-sizing: border-box;
    padding: 32px 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 20px;
    color: var(--tn-fg-1);
    background:
        radial-gradient(60% 50% at 50% 0%, rgba(91, 193, 234, 0.14), transparent 70%),
        var(--tn-page);
}

.tn-auth__card {
    width: 100%;
    max-width: 420px;
    box-sizing: border-box;
    padding: 36px 32px 32px;
    background: var(--tn-card);
    border: 1px solid var(--tn-line-soft);
    border-radius: var(--tn-r-card);
    box-shadow: var(--tn-shadow-pop);
}

.tn-auth__logo {
    display: block;
    height: 28px;
    width: auto;
    margin-bottom: 28px;
}

.tn-auth__title {
    margin: 8px 0 0;
    font-size: var(--tn-page-title-size);
    line-height: 1.15;
    font-weight: 700;
    color: var(--tn-fg-1);
}

.tn-auth__sub {
    margin: 10px 0 0;
    font-size: 14px;
    line-height: 1.5;
    color: rgba(255, 255, 255, 0.68);
}

.tn-auth__sub strong {
    color: var(--tn-fg-1);
    font-weight: 600;
    word-break: break-all;
}

.tn-auth__form {
    margin-top: 24px;
    display: flex;
    flex-direction: column;
}

.tn-auth__label {
    margin-bottom: 8px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.55);
}

.tn-auth__input {
    width: 100%;
    box-sizing: border-box;
    padding: 13px 14px;
    font-family: var(--tn-font);
    font-size: 15px;
    color: var(--tn-fg-1);
    background: var(--tn-card-inset);
    border: 1px solid var(--tn-line);
    border-radius: var(--tn-r-sm);
    outline: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.tn-auth__input::placeholder { color: var(--tn-fg-3); }

.tn-auth__input:focus {
    border-color: var(--tn-sky);
    box-shadow: 0 0 0 3px rgba(91, 193, 234, 0.2);
}

.tn-auth__input[aria-invalid="true"] {
    border-color: var(--tn-coral);
    box-shadow: 0 0 0 3px rgba(225, 96, 85, 0.18);
}

.tn-auth__error {
    margin: 8px 0 0;
    font-size: 13px;
    line-height: 1.4;
    color: var(--tn-coral);
}

.tn-auth__submit {
    box-sizing: border-box;
    width: 100%;
    margin-top: 16px;
    padding: 14px 22px;
}

.tn-auth__submit:focus-visible,
.tn-auth__social-btn:focus-visible {
    outline: 2px solid var(--tn-sky);
    outline-offset: 2px;
}

.tn-auth__divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 28px 0 16px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.45);
}

.tn-auth__divider::before,
.tn-auth__divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--tn-line-soft);
}

.tn-auth__social {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
}

.tn-auth__social-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    color: var(--tn-fg-1);
    background: var(--tn-card-inset);
    border: 1px solid var(--tn-line);
    border-radius: var(--tn-r-sm);
    text-decoration: none;
    transition: border-color 0.15s ease, background-color 0.15s ease, transform 0.1s ease;
}

.tn-auth__social-btn:hover {
    border-color: rgba(91, 193, 234, 0.5);
    background: var(--tn-widget);
}

.tn-auth__social-btn:active { transform: scale(0.96); }

.tn-auth__sent-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    margin-bottom: 20px;
    color: var(--tn-sky);
    background: rgba(91, 193, 234, 0.1);
    border: 1px solid rgba(91, 193, 234, 0.25);
    border-radius: 14px;
}

.tn-auth__status {
    text-align: center;
}

.tn-auth__status .tn-auth__logo {
    margin-left: auto;
    margin-right: auto;
}

.tn-auth__status .tn-auth__sent-icon {
    margin-left: auto;
    margin-right: auto;
}

.tn-auth__spinner {
    width: 40px;
    height: 40px;
    margin: 0 auto 20px;
    border: 3px solid rgba(91, 193, 234, 0.2);
    border-top-color: var(--tn-sky);
    border-radius: 50%;
    animation: tn-auth-spin 0.8s linear infinite;
}

@keyframes tn-auth-spin { to { transform: rotate(360deg); } }

.tn-auth__sent-icon--error {
    color: var(--tn-coral);
    background: rgba(225, 96, 85, 0.1);
    border-color: rgba(225, 96, 85, 0.3);
}

.tn-auth__foot {
    margin: 0;
    font-family: var(--tn-font);
    font-size: 13px;
    color: rgba(255, 255, 255, 0.55);
}

[hidden] { display: none !important; }

@media (max-width: 480px) {
    .tn-auth { justify-content: flex-start; padding-top: 48px; }
    .tn-auth__card { padding: 28px 20px 24px; }
}

@media (prefers-reduced-motion: reduce) {
    .tn-fade { animation: none; }
    .tn-auth__spinner { animation-duration: 2.4s; }
}