.signup-page { max-width: 580px; padding-top: 36px; padding-bottom: 64px; }
.signup-page .brand { display: inline-flex; min-height: 44px; align-items: center; }
.signup-page .page-intro { padding: 36px 0 24px; margin: 0; }
.signup-page h1 { font-size: clamp(1.85rem, 5vw, 2.55rem); line-height: 1.12; letter-spacing: -.045em; }
.signup-page .page-intro p { margin-top: 18px; font-size: 1rem; line-height: 1.65; }
.signup-page section.tool-form { padding: 28px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); gap: 14px; }
.signup-page form { display: grid; gap: 14px; }
.signup-page .button { min-height: 48px; width: 100%; }
.signup-page .button-secondary { background: var(--surface); color: var(--ink); border: 1px solid var(--border-strong); }
.signup-page .button-secondary:hover { background: var(--surface-muted); border-color: var(--brand-link); }
.signup-page section.tool-form > form { border-top: 1px solid var(--line); padding-top: 22px; margin-top: 8px; }
.signup-page section.tool-form p { font-size: .925rem; line-height: 1.6; }
.signup-page details { border-top: 1px solid var(--line); padding-top: 10px; }
.signup-page summary { cursor: pointer; min-height: 44px; padding: 10px 0; font-size: .925rem; }
.signup-page input { min-height: 48px; font-size: 1rem; }
.signup-page input[name="code"] { letter-spacing: .28em; font-size: 1.6rem; }
.signup-page p a { text-decoration: underline; text-underline-offset: 3px; }
.signup-page [role="alert"] { padding: 12px; background: #fff3e9; color: #75380c; border-radius: 4px; }
.signup-page > form + form { margin-top: 18px; }
.signup-page > p { margin-top: 16px; }
.signup-page :is(a,button,input,summary):focus-visible { outline: 3px solid var(--brand-link); outline-offset: 4px; }
@media (max-width: 600px) {
  .signup-page { width: auto; margin: 0 20px; padding-top: 20px; }
  .signup-page section.tool-form { padding: 20px; }
}