.stage-completion {
  position: fixed;
  z-index: 3000;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(5, 31, 51, 0.82);
  backdrop-filter: blur(8px);
}

.stage-completion[hidden] {
  display: none;
}

.stage-completion-card {
  width: min(440px, 100%);
  max-height: calc(100svh - 40px);
  overflow: auto;
  padding: 38px 32px 32px;
  border: 4px solid #aa9a88;
  color: #30363a;
  background: #fffdf6;
  text-align: center;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.32);
  font-family: "Courier New", Courier, monospace;
}

.stage-completion-stamp {
  display: inline-block;
  padding: 8px 13px;
  border: 3px solid #18835e;
  color: #18835e;
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.2em;
  transform: rotate(-4deg);
}

.stage-completion-kicker {
  margin: 24px 0 9px;
  color: #7c7770;
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.16em;
}

.stage-completion-card h2 {
  margin: 0;
  font-size: clamp(27px, 7vw, 38px);
  font-weight: 400;
  line-height: 1.12;
}

.stage-completion-copy {
  margin: 18px auto 0;
  max-width: 330px;
  color: #7c7770;
  font-size: 13px;
  line-height: 1.55;
}

.stage-completion-next {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 25px;
  padding: 0 20px;
  color: #fffdf8;
  background: #4d453e;
  text-decoration: none;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.06em;
}

.stage-completion-next:hover,
.stage-completion-next:focus-visible {
  outline: 3px solid rgba(24, 131, 94, 0.38);
  outline-offset: 3px;
  background: #302c28;
}

@media (max-width: 560px) {
  .stage-completion {
    padding: 12px;
  }

  .stage-completion-card {
    max-height: calc(100svh - 24px);
    padding: 31px 21px 25px;
  }
}