.blue-page main {
  position: relative;
  overflow: hidden;
}

.blue-circle-bg {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  z-index: 1;
}

.blue-circle-bg svg {
  width: min(80vw, 80vh);
  height: min(80vw, 80vh);
  opacity: 0.05;
  animation: slow-rotate 60s linear infinite;
}

@keyframes slow-rotate {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.blue-board {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 540px;
  padding: 1rem;
}

.blue-message {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 6vw, 2.6rem);
  line-height: 1.3;
  letter-spacing: 0.04em;
  color: var(--noir-paper);
  margin-bottom: 2.25rem;
  text-shadow: 0 2px 0 rgba(0, 0, 0, 0.55);
}

.blue-stamp {
  display: inline-block;
  font-family: var(--font-mono);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.4em;
  color: var(--noir-blood);
  border: 2px double var(--noir-blood);
  padding: 0.35rem 0.85rem;
  transform: rotate(-5deg);
  opacity: 0.85;
}

.blue-input-section {
  margin-top: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 320px;
  margin-left: auto;
  margin-right: auto;
}

.blue-input-section.hidden {
  display: none;
}

.blue-input {
  font-size: 16px;
  padding: 0.9rem 1rem;
  border: 2px solid rgba(212, 197, 160, 0.35);
  background: rgba(0, 0, 0, 0.35);
  color: var(--noir-paper);
  text-align: center;
  letter-spacing: 0.06em;
  font-family: var(--font-mono);
  width: 100%;
}

.blue-input:focus {
  border-color: var(--noir-gold);
}

.blue-check-btn {
  padding: 0.9rem 1.5rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  background: var(--noir-paper);
  color: var(--noir-bg);
  font-weight: bold;
  font-size: 0.95rem;
  border: 2px solid var(--noir-paper);
  transition: background 0.15s ease;
}

.blue-check-btn:hover,
.blue-check-btn:active {
  background: var(--noir-gold);
  border-color: var(--noir-gold);
}

.blue-feedback {
  min-height: 1.4rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  margin-top: 0.25rem;
  color: #d96666;
  letter-spacing: 0.05em;
}

.blue-reveal {
  display: none;
  flex-direction: column;
  align-items: center;
  margin-top: 2rem;
}

.blue-reveal.active {
  display: flex;
  animation: reveal-pop 0.9s ease-out;
}

.blue-reveal .reveal-title {
  font-family: var(--font-mono);
  font-size: clamp(1.2rem, 4vw, 1.75rem);
  letter-spacing: 0.18em;
  margin-bottom: 1rem;
  color: var(--noir-paper);
}

.blue-reveal .reveal-cipher {
  font-size: clamp(8rem, 25vw, 18rem);
  font-family: var(--font-mono);
  color: var(--noir-gold);
  text-shadow: 0 0 40px rgba(201, 169, 97, 0.4), 0 6px 0 rgba(0, 0, 0, 0.35);
  line-height: 1;
}

.shake {
  animation: shake 0.4s ease-in-out;
}