/* ── 13. Auth (login / signup) ── */
.auth-layout {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--color-bg-base);
}

.auth-topbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-6);
    background: var(--color-primary);
    color: #fff;
    box-shadow: var(--shadow-md);
}

.auth-topbar-brand {
    font-weight: 800;
    font-size: var(--text-lg);
    letter-spacing: -0.02em;
    color: #fff;
    text-decoration: none;
}

.auth-topbar-brand:hover {
    color: #fff;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.auth-topbar-nav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-4);
    font-size: var(--text-sm);
    font-weight: 600;
}

.auth-topbar-nav a {
    color: rgba(255, 255, 255, 0.92);
    text-decoration: none;
}

.auth-topbar-nav a:hover {
    color: #fff;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.auth-topbar-nav-cta {
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.18);
    border: 1px solid rgba(255, 255, 255, 0.35);
}

.auth-topbar-nav-cta:hover {
    background: rgba(255, 255, 255, 0.28);
    text-decoration: none !important;
}

.auth-site-footer {
    padding: var(--space-5) var(--space-6);
    text-align: center;
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
    border-top: 1px solid var(--color-border);
    background: var(--color-bg-elevated);
}

.auth-site-footer-copy {
    margin: 0;
    max-width: 40rem;
    margin-inline: auto;
    line-height: var(--leading-normal);
}

.auth-layout .auth-shell {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    min-height: 0;
}

body.auth-body-signup .auth-layout .auth-shell {
    align-items: flex-start;
    padding-top: var(--space-8);
    padding-bottom: var(--space-10);
}

.auth-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: var(--space-6);
}

.auth-card {
    width: min(440px, 100%);
}

.auth-card .card {
    box-shadow: var(--shadow-lg);
}

.auth-card .brand {
    justify-content: center;
    padding-bottom: var(--space-5);
}

.auth-card .brand-text {
    align-items: center;
    text-align: center;
}

.auth-brand {
    padding-bottom: var(--space-4);
}

.auth-card .card > p + form {
    margin-top: var(--space-5);
}

/* Wider auth card (signup split layout) */
.auth-card.auth-card--signup {
    width: min(920px, 100%);
}

body.auth-body-signup {
    background-color: var(--color-bg-base);
    background-image:
        radial-gradient(ellipse 100% 80% at 0% -30%, rgba(var(--color-primary-rgb), 0.14), transparent 55%),
        radial-gradient(ellipse 80% 50% at 100% 0%, rgba(14, 165, 233, 0.1), transparent 50%);
    background-attachment: fixed;
}

body.auth-body-signup .auth-brand {
    padding-bottom: var(--space-5);
}

body.auth-body-signup .auth-card.auth-card--signup .auth-brand {
    padding-bottom: var(--space-4);
}