/* Signup form: field, button, status note and confirmation. Separation by surface, not outlines. */
.signup__form {
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
}
.signup__label {
  font-family: var(--mono);
  font-size: var(--text-micro);
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--muted);
}
.signup__row {
  display: flex;
  flex-direction: column;
  gap: var(--s-1);
}

/* Field */
.signup__input {
  width: 100%;
  min-width: 0;
  margin: 0;
  border: 0;
  border-bottom: 2px solid var(--line);
  border-radius: 2px 2px 0 0;
  background: var(--field);
  color: var(--fg);
  font: 400 var(--text-base)/1.4 var(--sans);
  padding: 18px 20px 16px;
  outline: none;
  transition: background-color var(--ease), border-color var(--ease);
}
.signup__input::placeholder { color: var(--muted); opacity: 0.7; }
.signup__input:hover { background: var(--field-hover); }
.signup__input:focus,
.signup__input:focus-visible { background: var(--field-hover); border-bottom-color: var(--teal); }
.signup__input[aria-invalid="true"] { border-bottom-color: var(--error); }
.signup__input:disabled { opacity: 0.5; cursor: not-allowed; }

/* Button */
.signup__button {
  margin: 0;
  border: 0;
  border-radius: 2px;
  padding: 18px 28px;
  background: var(--teal);
  color: var(--ink);
  font: 600 var(--text-sm)/1 var(--sans);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
  cursor: pointer;
  outline: 2px solid transparent;
  outline-offset: 3px;
  transition: background-color var(--ease), color var(--ease), outline-color var(--ease);
}
.signup__button:hover { background: var(--teal-hover); }
.signup__button:active { background: var(--teal-active); }
.signup__button:focus-visible { outline-color: var(--gold); }
.signup__button:disabled,
.signup__button:disabled:hover {
  background: var(--line);
  color: var(--muted);
  cursor: not-allowed;
}

/* Status line */
.signup__note {
  margin: 0;
  min-height: 1.5em;
  font-family: var(--mono);
  font-size: var(--text-micro);
  letter-spacing: 0.04em;
  color: var(--muted);
  transition: color var(--ease);
}
.signup__note.is-error { color: var(--error); }

/* Spam trap: real people never see or fill this field. */
.signup__trap {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* Confirmation */
.signup__done {
  display: flex;
  flex-direction: column;
  gap: var(--s-1);
  padding: var(--s-4);
  background: var(--field);
}
.signup__done-title {
  margin: 0;
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: 1.75rem;
  line-height: 1.1;
  letter-spacing: var(--tracking-tight);
  color: var(--teal);
}
.signup__done-text {
  margin: 0;
  color: var(--muted);
  overflow-wrap: anywhere;
}

@media (min-width: 480px) {
  .signup__row { flex-direction: row; gap: 0; }
  .signup__input { flex: 1; }
  .signup__button { border-radius: 0 2px 2px 0; }
}