.contact-success-dialog {
  width: min(440px, calc(100% - 32px));
  max-width: 440px;
  max-height: calc(100vh - 32px);
  margin: auto;
  padding: 0;
  border: 0;
  border-radius: 24px;
  color: #10213d;
  background: #fff;
  box-shadow: 0 30px 90px rgba(0, 12, 42, .3);
  overflow: auto;
}

.contact-success-dialog::backdrop {
  background: rgba(5, 13, 32, .7);
  backdrop-filter: blur(7px);
}

.contact-success-dialog__body {
  display: grid;
  justify-items: center;
  padding: 34px 32px 30px;
  text-align: center;
}

.contact-success-dialog__icon {
  display: grid;
  width: 62px;
  height: 62px;
  margin-bottom: 20px;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: linear-gradient(135deg, #20b875, #00c7b7);
  box-shadow: 0 14px 32px rgba(32, 184, 117, .28);
  font-size: 31px;
  font-weight: 900;
  line-height: 1;
}

.contact-success-dialog h2 {
  margin: 0 0 10px;
  color: #10213d;
  font-size: clamp(25px, 5vw, 31px);
  line-height: 1.2;
}

.contact-success-dialog p {
  max-width: 34ch;
  margin: 0;
  color: #53627b;
  font-size: 15px;
  line-height: 1.65;
}

.contact-success-dialog form {
  width: 100%;
  margin: 24px 0 0;
}

.contact-success-dialog button {
  width: 100%;
  min-height: 46px;
  padding: 11px 20px;
  border: 0;
  border-radius: 12px;
  color: #fff;
  background: linear-gradient(135deg, #2f80ff, #6c5cff);
  box-shadow: 0 14px 30px rgba(47, 128, 255, .25);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.contact-success-dialog button:hover { filter: brightness(1.04); }
.contact-success-dialog button:focus-visible { outline: 3px solid rgba(47, 128, 255, .35); outline-offset: 3px; }

@media (max-width: 520px) {
  .contact-success-dialog__body { padding: 28px 22px 24px; }
}