.mailbox-dialog {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: none;
  max-height: none;
  margin: 0;
  padding: 0;
  border: 0;
  overflow: hidden;
  background: transparent;
  color: #171311;
}
.mailbox-dialog::backdrop { background: transparent; }
.mailbox-scrim, .mailbox-viewport, .mailbox-snapshot, .mailbox-shade {
  position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none;
}
.mailbox-scrim { background: #fff; opacity: 0; }
.mailbox-viewport canvas { display: block; width: 100%; height: 100%; }
.mailbox-snapshot { object-fit: fill; transform-origin: center; }
.mailbox-shade {
  opacity: 0;
  background: radial-gradient(ellipse at center, transparent 25%, #240e1055 100%);
  transition: opacity 300ms ease;
}
.mailbox-close {
  position: absolute;
  z-index: 5;
  top: max(20px, env(safe-area-inset-top));
  right: max(20px, env(safe-area-inset-right));
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid #ffffffa6;
  border-radius: 50%;
  background: #fffdf4f2;
  color: #241510;
  font: 30px/1 Arial, sans-serif;
  cursor: pointer;
  box-shadow: 0 4px 18px #200a0a24;
}
.mailbox-close:focus-visible { outline: 3px solid #21130e; outline-offset: 4px; }
.mailbox-island {
  position: absolute;
  z-index: 3;
  top: 50%;
  left: 50%;
  width: min(510px, calc(100% - 40px));
  height: min(580px, calc(100% - 100px));
  border: 1px solid #ffffffc9;
  border-radius: 22px;
  background: #fffdf7f5;
  box-shadow: 0 32px 90px #25060480, 0 3px 14px #25060426;
  transform: translate(-50%, calc(-50% + 20px)) scale(.97);
  opacity: 0;
  visibility: hidden;
  transition: opacity 280ms ease, transform 340ms cubic-bezier(.2,.8,.2,1), visibility 280ms;
}
.mailbox-dialog.form-visible .mailbox-island {
  opacity: 1; visibility: visible; transform: translate(-50%, -50%) scale(1);
}
.mailbox-dialog.form-visible .mailbox-shade { opacity: 1; }
.mailbox-loading {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  margin: 0;
  font: 15px/1.4 Arial, sans-serif;
  color: #49312a;
}
.mailbox-dialog:not([aria-busy="true"]) .mailbox-loading { display: none; }
.mailbox-dialog.model-unavailable .mailbox-scrim {
  opacity: 1 !important;
  background: radial-gradient(ellipse at 50% 40%, #c76d60, #64241f);
}
body.mailbox-modal-open { overflow: hidden; }
@media (max-width: 500px) {
  .mailbox-island { width: calc(100% - 28px); border-radius: 18px; }
  .mailbox-close { top: max(12px, env(safe-area-inset-top)); right: max(14px, env(safe-area-inset-right)); }
}
@media (prefers-reduced-motion: reduce) {
  .mailbox-island, .mailbox-shade { transition: none; }
}