/*
 * Auth pages: login, TOTP challenge/setup, post-error screen.
 * Requires 01-vars.css, 02-base.css, 03-ui.css.
 */

@keyframes auth-fade-up {
    from { opacity: 0; transform: translateY(14px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes auth-shake {
    0%, 100% { transform: translateX(0); }
    14%      { transform: translateX(-8px); }
    28%      { transform: translateX(7px); }
    42%      { transform: translateX(-5px); }
    57%      { transform: translateX(4px); }
    71%      { transform: translateX(-2px); }
    85%      { transform: translateX(2px); }
}

/* ── Centered single-card layout (login / TOTP challenge / setup / post-error) ─────── */

.auth-wrap {
    position: relative;
    z-index: 1;
    display: grid;
    place-items: center;
    min-height: 100svh;
    padding: 1.5rem;
}

/* ── Shared card ──────────────────────────────────────────────────────────── */

.login-card,
.auth-wrap main {
    width: min(100%, 400px);
    padding: 2.1rem 1.85rem 1.9rem;
    background: var(--app-surface);
    border: 1px solid var(--app-border);
    border-radius: 16px;
    box-shadow: var(--app-shadow), var(--app-inset);
    animation: auth-fade-up .45s cubic-bezier(.4, 0, .2, 1) both;
}

.auth-wrap main.auth-card-wide {
    width: min(100%, 460px);
}

.card-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .5rem;
    margin-bottom: 1rem;
}

.card-brand-logo {
    height: 40px;
    width: auto;
    max-width: none;
    flex-shrink: 0;
    object-fit: contain;
    filter: drop-shadow(0 8px 22px rgba(46, 127, 255, .4));
}

.card-brand-text {
    color: var(--app-soft);
    font-size: .8rem;
    font-weight: 520;
    letter-spacing: .02em;
}

.login-card .card-brand-text {
    display: none;
}

.form-heading {
    margin-bottom: 1.1rem;
    text-align: center;
    display: grid;
    gap: .5rem;
}

.form-heading h1,
.auth-wrap main h1 {
    font-size: 1.3rem;
    font-weight: 620;
    letter-spacing: -.02em;
    line-height: 1.25;
    color: var(--app-text);
}

.auth-gradient-text {
    background: linear-gradient(110deg, var(--brand-blue-bright) 15%, var(--brand-blue-pale) 85%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.auth-step-label {
    font-family: var(--font-mono, monospace);
    font-size: .68rem;
    font-weight: 600;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--app-muted);
}

.auth-step-track {
    display: flex;
    align-items: center;
    gap: 6px;
    height: 2px;
    margin: 1.1rem 0 1.3rem;
}

.auth-step-seg {
    flex: 1;
    height: 2px;
    border-radius: 2px;
    background: var(--app-border);
    transition: background 300ms cubic-bezier(.4, 0, .2, 1);
}

.auth-step-seg-active {
    background: rgba(46, 127, 255, .55);
}

.auth-step-seg-done {
    background: var(--brand-blue);
}

.form-heading p,
.auth-sub {
    margin-top: .35rem;
    font-size: .9rem;
    color: var(--app-muted);
    line-height: 1.45;
}

.auth-sub {
    margin-bottom: 1.4rem;
}

/* ── Alerts ───────────────────────────────────────────────────────────────── */

.auth-message {
    margin-bottom: 1.1rem;
    padding: .72rem .88rem;
    border-radius: var(--app-radius-sm);
    font-size: .82rem;
    line-height: 1.45;
    border: 1px solid;
    color: var(--app-err);
    background: var(--app-err-dim);
    border-color: var(--app-err-bdr);
}

.auth-message-ok {
    color: var(--app-ok);
    background: var(--app-ok-dim);
    border-color: var(--app-ok-bdr);
}

/* ── Passkey challenge/setup pages ───────────────────────────────────────── */

#passkey-status {
    margin-bottom: 1.4rem;
    color: var(--app-muted);
    font-size: .88rem;
    line-height: 1.5;
}

/* ── Fields ───────────────────────────────────────────────────────────────── */

.field {
    margin-bottom: 1rem;
}

.auth-wrap label,
.field label {
    display: block;
    margin-bottom: .5rem;
    color: var(--app-muted);
    font-family: var(--font-mono, monospace);
    font-size: .6rem;
    font-weight: 600;
    letter-spacing: .14em;
    text-transform: uppercase;
}

.auth-wrap label {
    margin-top: 1rem;
}

.field-checkbox {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .75rem;
    margin-bottom: 1.4rem;
}

.auth-link {
    color: var(--app-accent);
    font-size: .82rem;
    font-weight: 500;
    text-decoration: none;
    white-space: nowrap;
}

.auth-link:hover {
    text-decoration: underline;
}

.field-checkbox .checkbox-label {
    display: flex;
    align-items: center;
    gap: .5rem;
    margin: 0;
    color: var(--app-muted);
    font-size: .82rem;
    font-weight: 400;
    text-transform: none;
    letter-spacing: normal;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    margin: 0;
    accent-color: var(--app-accent, currentColor);
    cursor: pointer;
}

.input-wrap {
    position: relative;
}

.login-card input,
.auth-wrap input {
    width: 100%;
    min-height: 48px;
    padding: .82rem .92rem;
    color: var(--app-text);
    background: var(--app-surface-soft);
    border: 1px solid var(--app-border);
    border-radius: 10px;
    font: inherit;
    font-size: .875rem;
    outline: none;
    transition: border-color .14s, box-shadow .14s, background .14s;
}

.auth-wrap input {
    font-size: 1.15rem;
    letter-spacing: .18em;
    text-align: center;
}

.login-card input:focus,
.auth-wrap input:focus {
    background: var(--app-surface-hi);
    border-color: var(--app-accent-bdr);
    box-shadow: 0 0 0 4px var(--app-accent-dim);
}

.pw-wrap input {
    padding-right: 3.1rem;
}

.pw-toggle {
    position: absolute;
    right: .35rem;
    top: .35rem;
    bottom: .35rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.35rem;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--app-muted);
    padding: 0;
    border-left: 1px solid var(--app-border-soft);
    border-radius: 10px;
    transition: color .14s, background .14s;
}

.pw-toggle:hover {
    color: var(--app-text);
    background: var(--app-surface-soft);
}

.pw-toggle svg {
    width: 15px;
    height: 15px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.7;
    stroke-linecap: round;
    stroke-linejoin: round;
    pointer-events: none;
}

.pw-icon-hide {
    display: none;
}

.pw-toggle[aria-pressed="true"] .pw-icon-show {
    display: none;
}

.pw-toggle[aria-pressed="true"] .pw-icon-hide {
    display: block;
}

/* ── Buttons ──────────────────────────────────────────────────────────────── */

.btn-submit,
.btn-primary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    width: 100%;
    min-height: 48px;
    margin-top: 1.1rem;
    padding: .82rem 1rem;
    color: var(--brand-on-blue);
    background: linear-gradient(135deg, var(--brand-blue), var(--brand-blue-deep));
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font: inherit;
    font-family: var(--font-mono, monospace);
    font-size: .74rem;
    font-weight: 620;
    letter-spacing: .07em;
    text-transform: uppercase;
    box-shadow: 0 2px 12px rgba(46, 127, 255, .35);
    transition: opacity .15s cubic-bezier(.4, 0, .2, 1), box-shadow .22s cubic-bezier(.4, 0, .2, 1);
    text-decoration: none;
}

.btn-submit:hover,
.btn-primary:hover {
    opacity: .88;
    box-shadow: 0 4px 18px rgba(46, 127, 255, .45);
}

.btn-arrow {
    display: inline-flex;
    transition: transform 220ms cubic-bezier(.4, 0, .2, 1);
}

.btn-submit:hover .btn-arrow,
.btn-primary:hover .btn-arrow {
    transform: translateX(2px);
}

.btn-ghost {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 48px;
    margin-top: .6rem;
    padding: .72rem 1rem;
    color: var(--app-soft);
    background: transparent;
    border: 1px solid var(--app-border);
    border-radius: 12px;
    cursor: pointer;
    font: inherit;
    font-size: .88rem;
    transition: background .14s, color .14s;
}

/* ── Progressive alt sign-in methods ─────────────────────────────────────── */

.auth-alt {
    margin: .9rem 0 .2rem;
}

.auth-alt summary {
    cursor: pointer;
    color: var(--app-accent-strong);
    font-size: .85rem;
    font-weight: 560;
    list-style: none;
    user-select: none;
}

.auth-alt summary::-webkit-details-marker {
    display: none;
}

.auth-alt summary:hover {
    text-decoration: underline;
}

.auth-alt[open] summary {
    margin-bottom: .8rem;
}

.auth-alt-form {
    margin-top: .9rem;
    padding-top: .9rem;
    border-top: 1px solid var(--app-border-soft);
}

.auth-footer {
    display: flex;
    justify-content: center;
    margin-top: 1.25rem;
    padding-top: 1rem;
    border-top: 1px solid var(--app-border-soft);
}

.auth-footer a {
    display: inline-flex;
    align-items: center;
    gap: .45rem;
    color: var(--app-muted);
    font-family: var(--font-mono, monospace);
    font-size: .68rem;
    font-weight: 650;
    letter-spacing: .1em;
    text-decoration: none;
    text-transform: uppercase;
    transition: color .14s;
}

.auth-footer a:hover {
    color: var(--app-text);
}

.auth-footer svg {
    width: 15px;
    height: 15px;
    fill: none;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 1.75;
}

.btn-ghost:hover {
    background: var(--app-surface-soft);
    color: var(--app-text);
}

.btn-spinner {
    display: none;
    width: 13px;
    height: 13px;
    border: 2px solid rgba(8, 12, 16, .35);
    border-top-color: var(--brand-on-blue);
    border-radius: 50%;
    animation: spin .55s linear infinite;
    flex-shrink: 0;
}

.btn-submit.loading .btn-spinner {
    display: block;
}

.btn-submit.loading .btn-label {
    opacity: .75;
}

/* ── TOTP setup extras ────────────────────────────────────────────────────── */

.qr {
    display: grid;
    place-items: center;
    margin: 1rem 0;
    padding: .9rem;
    background: #fff;
    border-radius: var(--app-radius-sm);
    overflow: hidden;
}

.qr svg,
.qr img {
    display: block;
    width: min(100%, 220px);
    height: auto;
}

/* Shared declarations (padding/color/background/border/font/...) live in
   03-ui.css's `.secret-box, .wc-secret-box` rule; only this page's own
   border-radius/spacing choices stay here. */
.secret-box {
    border-radius: var(--app-radius-sm);
}

.secret-box.recovery-codes {
    margin-bottom: 1rem;
}

/* ── Generic POST-error page ──────────────────────────────────────────────── */

.auth-postbox {
    display: grid;
    place-items: center;
    min-height: 100svh;
    padding: 1.5rem;
}

.auth-postbox main {
    width: min(100%, 420px);
    padding: 2rem 1.85rem;
    background: var(--app-surface-hi);
    border: 1px solid var(--app-border);
    border-radius: 20px;
    box-shadow: var(--app-shadow);
    backdrop-filter: blur(28px);
    -webkit-backdrop-filter: blur(28px);
}

.auth-postbox h1 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: .45rem;
    color: var(--app-text);
}

.auth-postbox p {
    color: var(--app-soft);
    font-size: .88rem;
    margin-bottom: 1.25rem;
}

.auth-postbox a {
    display: inline-flex;
    align-items: center;
    min-height: 48px;
    padding: .82rem 1.1rem;
    color: #fff;
    background: linear-gradient(180deg, var(--brand-blue-light) 0%, var(--brand-blue) 100%);
    border: 1px solid rgba(110, 184, 255, .24);
    border-radius: 12px;
    text-decoration: none;
    font-size: .9rem;
    font-weight: 620;
}

.auth-postbox a:hover {
    filter: saturate(1.06);
}

@media (max-width: 799px) {
    .auth-wrap {
        padding: 1rem;
    }

    .login-card,
    .auth-wrap main,
    .auth-postbox main {
        width: min(100%, 100%);
        padding: 1.5rem 1.15rem 1.2rem;
        border-radius: 18px;
    }

    .card-brand {
        margin-bottom: 1.25rem;
        padding-bottom: .85rem;
    }

    .card-brand-text {
        font-size: .76rem;
    }

    .form-heading {
        margin-bottom: 1.35rem;
    }

    .form-heading h1,
    .auth-wrap main h1 {
        font-size: 1.28rem;
    }

    /* Prevent iOS Safari from auto-zooming the page when an input < 16px is focused. */
    .login-card input,
    .auth-wrap input {
        font-size: 16px;
    }

    .auth-wrap input {
        letter-spacing: .14em;
    }

    .btn-submit,
    .btn-primary,
    .btn-ghost {
        font-size: .78rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .login-card,
    .auth-wrap main {
        animation: none;
    }

    .btn-spinner {
        animation-duration: 1.2s;
    }
}