.signal-auth-shell {
  width: min(1120px, calc(100% - 40px));
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

.signal-auth-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.signal-auth-header .signal-logo small {
  display: block;
  margin-top: 3px;
  font-size: 12px;
}

.signal-auth-header .signal-logo-mark {
  flex-shrink: 0;
}

.signal-auth-main {
  flex: 1;
  display: grid;
  place-items: center;
  padding: 40px 0;
  min-width: 0;
}

.signal-auth-card {
  width: min(440px, 100%);
  min-width: 0;
  padding: 32px;
}

.signal-auth-tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-bottom: 1px solid var(--line);
  margin-bottom: 28px;
}

.signal-auth-tabs a {
  padding: 12px;
  text-align: center;
  text-decoration: none;
  color: var(--muted);
  border-bottom: 2px solid transparent;
}

.signal-auth-tabs a[aria-current="page"] {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 700;
}

.signal-auth-card h1 {
  margin: 0 0 24px;
  font-size: 24px;
  line-height: 1.4;
}

.signal-auth-field {
  margin-bottom: 18px;
}

.signal-auth-field label {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
}

.signal-auth-field input {
  display: block;
  width: 100%;
  min-width: 0;
  min-height: 48px;
  padding: 12px;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: var(--panel);
  color: var(--text);
  font: inherit;
  font-size: 16px;
}

.signal-auth-field input::placeholder {
  color: var(--muted);
  font-size: 14px;
}

.signal-auth-page a:focus-visible,
.signal-auth-field input:focus,
.signal-auth-submit:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.signal-auth-submit {
  width: 100%;
  min-height: 48px;
  padding: 12px 16px;
  border: 0;
  border-radius: 12px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.signal-auth-submit:hover {
  background: #1d4ed8;
}

.signal-auth-error {
  padding: 12px;
  margin-bottom: 20px;
  border: 1px solid #fecaca;
  border-radius: 8px;
  background: #fef2f2;
  color: #b91c1c;
  font-size: 14px;
  line-height: 1.6;
  overflow-wrap: anywhere;
}

.signal-auth-switch {
  margin: 22px 0 0;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.signal-auth-switch a {
  color: var(--accent);
  margin-left: 6px;
}

.signal-auth-footer {
  padding: 0 0 24px;
  text-align: center;
  color: var(--muted);
  font-size: 12px;
}

@media (max-width: 480px) {
  .signal-auth-shell {
    width: calc(100% - 24px);
  }

  .signal-auth-header {
    padding: 18px 0;
  }

  .signal-auth-header .signal-link {
    font-size: 14px;
  }

  .signal-auth-main {
    padding: 24px 0;
  }

  .signal-auth-card {
    padding: 24px 20px;
    border-radius: 16px;
  }
}