.header-actions .guest-auth-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  min-width: 116px;
  padding: 10px 20px;
  border: 1px solid #4edbf1;
  border-radius: 6px;
  background: #102331;
  color: #edfaff;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0;
  line-height: 1.2;
  text-transform: none;
  white-space: nowrap;
  cursor: pointer;
}
.header-actions .register-button { background: #18c8e7; color: #04151e; border-color: #18c8e7; }
.header-actions .guest-auth-button:hover { border-color: #ffe082; background: #203c4d; }
.header-actions .register-button:hover { background: #65e0f3; color: #04151e; }
.header-actions .guest-auth-button:focus-visible { outline: 3px solid #ffda68; outline-offset: 3px; }
.desktop-nav button { font-size: 12px; padding: 10px 12px; }
.chat-panel { width: min(390px, calc(100% - 20px)); }
.chat-panel.guest-chat { height: auto; max-height: calc(100dvh - 140px); }
.guest-chat .chat-guest { min-height: 0; overflow-y: auto; padding: 20px; }
.guest-chat .chat-welcome-icon { display: none; }
.guest-chat .chat-guest h3 { font-size: 22px; }
.guest-chat .chat-guest p { margin-bottom: 12px; font-size: 14px; }
.guest-chat .chat-guest button { min-height: 46px; border-radius: 6px; font-size: 16px; letter-spacing: 0; text-transform: none; }
@media (max-width: 1100px) {
  .desktop-nav { display: none; }
  .hamburger { display: block; }
  .header-actions { margin-left: auto; }
}
@media (max-width: 820px) {
  .header-actions .guest-auth-button { min-height: 44px; height: 44px; min-width: 76px; padding: 9px 10px; font-size: 14px; }
  .chat-panel.guest-chat { max-height: calc(100dvh - 164px); }
}
@media (max-width: 370px) {
  .header-actions .guest-auth-button { min-width: 72px; padding: 9px 8px; }
  .guest-chat .chat-guest { padding: 14px; }
  .guest-chat .chat-panel-head { min-height: 62px; padding: 8px 12px; }
}