.signup-main {
  width: min(480px, calc(100% - 32px));
  margin: 0 auto;
  padding: clamp(24px, 7vh, 72px) 0 48px;
}

.signup-card {
  padding: clamp(22px, 6vw, 38px);
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  background: var(--surface-strong);
}

.signup-card h1 { margin: 0; font-size: clamp(28px, 6vw, 40px); line-height: 1.1; }
.signup-intro, .signup-note, .signup-success p { color: var(--muted); line-height: 1.55; }
.signup-intro { margin: 12px 0 26px; }
.signup-note { margin: 20px 0 0; font-size: 14px; }

.signup-field { display: grid; gap: 6px; margin-bottom: 17px; }
.signup-field label { font-size: 14px; font-weight: 700; }
.signup-field input {
  min-width: 0;
  min-height: 46px;
  padding: 9px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--ink-soft);
  color: var(--text);
  font-size: 16px;
}
.signup-field p { margin: 0; color: var(--muted); font-size: 13px; }
.signup-consent { display: flex; align-items: flex-start; gap: 10px; margin: 22px 0; font-size: 14px; line-height: 1.5; }
.signup-consent input { flex: 0 0 18px; width: 18px; height: 18px; margin: 2px 0 0; accent-color: var(--cyan); }
.signup-consent a { color: var(--cyan); }
.signup-card :focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }
.signup-card .button { width: 100%; cursor: pointer; }
.signup-card .button:disabled { cursor: default; opacity: .65; }
.signup-status { margin: 12px 0 0; color: var(--muted); font-size: 14px; line-height: 1.5; }
.signup-status:empty { margin: 0; }
.signup-status[data-error] { color: #ffc2b9; }
.signup-success { margin-top: 24px; padding-top: 18px; border-top: 1px solid var(--line); }
.signup-success h2 { margin: 0 0 8px; color: var(--cyan); font-size: 22px; }
.signup-success p { margin: 0; }