.guest-shell {
  width: min(1240px, calc(100% - 40px));
  margin: 26px auto 46px;
}

.guest-login-link,
.guest-access-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 17px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
  color: var(--blue);
  font-size: 13px;
  font-weight: 750;
  text-decoration: none;
}

.guest-login-link:hover,
.guest-access-button:hover { border-color: #b8c6e5; background: var(--blue-soft); }

.access-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 18px 0 14px;
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
}

.access-divider::before,
.access-divider::after { height: 1px; flex: 1; background: var(--line); content: ""; }
.access-divider + .guest-access-button { width: 100%; }
.guest-access-note { margin: 9px 0 0 !important; font-size: 11px !important; }

.guest-address-bar {
  display: grid;
  grid-template-columns: minmax(280px, .75fr) minmax(560px, 1.25fr);
  gap: 30px;
  align-items: center;
  padding: 24px 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.guest-address-bar > div > p:last-child { max-width: 540px; margin: 8px 0 0; color: var(--muted); font-size: 13px; line-height: 1.55; }

.guest-workspace {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  min-height: 570px;
  margin-top: 20px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.guest-mailbox-panel { display: flex; flex-direction: column; padding: 24px; border-right: 1px solid var(--line); background: #f8fafd; }
.guest-mailbox-panel > strong { overflow-wrap: anywhere; font-size: 15px; line-height: 1.45; }
.guest-address-actions { display: grid; grid-template-columns: 1fr; gap: 9px; margin-top: 18px; }
.guest-address-actions button { width: 100%; }
.guest-mailbox-panel .privacy-note { margin-top: auto; }
.guest-inbox-panel { min-width: 0; padding: 24px; }
.guest-message-layout { display: grid; grid-template-columns: minmax(270px, .8fr) minmax(0, 1.2fr); min-height: 455px; margin-top: 18px; overflow: hidden; border: 1px solid var(--line); border-radius: 8px; }
.guest-message-layout .message-list { border-right: 1px solid var(--line); }
.guest-message-layout .message-view { min-width: 0; }

@media (max-width: 980px) {
  .guest-address-bar { grid-template-columns: 1fr; }
  .guest-workspace { grid-template-columns: 1fr; }
  .guest-mailbox-panel { border-right: 0; border-bottom: 1px solid var(--line); }
  .guest-mailbox-panel .privacy-note { margin-top: 22px; }
}

@media (max-width: 720px) {
  .guest-shell { width: min(100% - 20px, 680px); margin-top: 12px; }
  .guest-address-bar { padding: 20px; }
  .guest-message-layout { grid-template-columns: 1fr; }
  .guest-message-layout .message-list { max-height: 310px; border-right: 0; border-bottom: 1px solid var(--line); }
  .topbar .service-status { display: none; }
}

@media (max-width: 480px) {
  .guest-address-bar .address-form { grid-template-columns: minmax(0, 1fr) 44px; }
  .guest-address-bar .address-form input,
  .guest-address-bar .address-form select,
  .guest-address-bar .address-form .primary-button { grid-column: 1 / -1; }
  .guest-address-bar .address-form .at-sign { display: none; }
  .guest-address-bar .address-form .icon-button { grid-column: 2; grid-row: 3; justify-self: end; }
  .guest-address-bar .address-form .primary-button { padding-right: 58px; }
  .guest-mailbox-panel,
  .guest-inbox-panel { padding: 18px; }
}