.auth-shell { min-height: 100vh; display: grid; place-items: center; padding: var(--space-6); background: var(--paper); }
.auth-card { width: min(100%, 420px); padding: clamp(24px, 6vw, 40px); border: 1px solid var(--line); border-radius: var(--radius-panel); background: var(--surface); }
.auth-brand { display: inline-flex; align-items: center; gap: 12px; color: var(--ink); font-size: 1.25rem; font-weight: 700; text-decoration: none; }
.auth-eyebrow { margin: 20px 0 8px; color: var(--muted); }
.auth-card h1 { margin: 0; font-size: clamp(1.7rem, 5vw, 2rem); }
.auth-description { margin: 8px 0 28px; color: var(--muted); }
.auth-form { display: grid; gap: 10px; }
.auth-form label { margin-top: 8px; font-weight: 600; }
.auth-form input { width: 100%; min-height: 48px; padding: 10px 14px; border: 1px solid var(--line); border-radius: var(--radius-control); background: var(--paper); color: var(--ink); font: inherit; }
.auth-form input:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; }
.auth-form button { min-height: 48px; margin-top: 8px; }
.auth-error { min-height: 1.4em; margin: 2px 0 0; color: var(--rust); }
@media (max-width: 480px) { .auth-shell { padding: 16px; } .auth-card { padding: 24px 20px; } }