.signup-island{max-width:var(--measure)}.signup-island--fade{animation:signup-fade-in .2s ease-out both}@keyframes signup-fade-in{0%{opacity:0}to{opacity:1}}@media(prefers-reduced-motion:reduce){.signup-island--fade{animation:none}}.signup-heading{font-size:1.25rem;font-weight:500;line-height:1.4;margin:0 0 .5rem;color:var(--foreground)}.signup-subtitle{font-family:var(--font-mono);font-size:.8125rem;font-weight:400;color:var(--muted-foreground);margin:0 0 var(--step)}.signup-form{display:flex;flex-direction:column;gap:calc(var(--step) * .75);margin-bottom:var(--step)}.signup-form-actions{display:flex;align-items:center;gap:1rem;padding-top:calc(var(--step) * .5)}.signup-btn{font-family:var(--font-mono);font-size:.875rem;font-weight:400;color:var(--foreground);background:transparent;border:0;padding:.125rem 0;cursor:pointer;user-select:none;transition:color .15s ease,transform .15s ease}.signup-btn:hover{color:var(--brand)}.signup-btn:focus-visible{outline:2px solid var(--ring);outline-offset:2px}.signup-btn:active{transform:translateY(1px)}.signup-btn:disabled{color:var(--muted-foreground);cursor:not-allowed;pointer-events:none}.signup-link{font-family:var(--font-mono);font-size:.8125rem;font-weight:400;color:var(--muted-foreground);text-decoration:none;border-bottom:1px solid var(--border);line-height:1.4;transition:color .15s ease,border-bottom-color .15s ease}.signup-link:hover{color:var(--foreground);border-bottom-color:var(--muted-foreground)}.signup-link:focus-visible{outline:2px solid var(--ring);outline-offset:2px;border-radius:1px}.signup-error{font-family:var(--font-mono);font-size:.8125rem;font-weight:400;color:var(--destructive);line-height:1.4;margin:0}@media(prefers-reduced-motion:reduce){.signup-btn,.signup-link{transition:none}.signup-btn:active{transform:none}}