* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  height: 100%;
  background: #000;
  overflow: hidden;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: -apple-system, BlinkMacSystemFont, 'Manrope', sans-serif;
}

.title {
  position: fixed;
  top: 6rem;
  left: 50%;
  transform: translateX(-50%);
  margin: 0;
  color: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  text-align: center;
  opacity: 0;
  transition: opacity 0.6s ease;
}

.title.visible {
  opacity: 1;
}

.code-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 2.5rem 3rem;
  border: 1px solid rgba(245, 242, 234, 0.25);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.code-box.hidden {
  opacity: 0;
  transform: scale(0.96);
  pointer-events: none;
}

.code-label {
  color: rgba(245, 242, 234, 0.6);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.code-input {
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(245, 242, 234, 0.4);
  color: #f5f2ea;
  font-size: 1.25rem;
  letter-spacing: 0.2em;
  text-align: center;
  padding: 0.5rem 0;
  width: 12rem;
  outline: none;
}

.code-input:focus {
  border-bottom-color: #b5502f;
}

.code-input.shake {
  animation: shake 0.4s ease;
}

.code-submit {
  background: none;
  border: none;
  color: #b5502f;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  cursor: pointer;
  padding: 0.25rem 0;
}

.code-submit:hover {
  opacity: 0.7;
}

.drone-field {
  position: fixed;
  inset: 0;
  pointer-events: none;
}

.drone {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 64px;
  height: 64px;
  margin: -32px 0 0 -32px;
  opacity: 0;
}

.drone.show {
  animation: flyIn 1s ease forwards;
}

.drone.blink {
  opacity: 1;
  animation: blink 1.6s ease-in-out infinite;
}

.swarm-unit {
  opacity: 0;
  animation: popOut 0.5s ease forwards;
}

@keyframes flyIn {
  from { transform: translateY(-120vh) rotate(0deg); opacity: 0; }
  to { transform: translateY(0) rotate(720deg); opacity: 1; }
}

@keyframes popOut {
  from { transform: translate(0, 0) scale(0); opacity: 0; }
  to { transform: translate(var(--dx), var(--dy)) scale(1); opacity: 1; }
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.25; }
}

.proceed-link {
  position: fixed;
  top: calc(50% + 160px);
  left: 50%;
  transform: translateX(-50%);
  color: #fff;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-bottom: 1px solid #fff;
  padding-bottom: 3px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.8s ease, color 0.2s ease, border-color 0.2s ease;
}

.proceed-link.visible {
  opacity: 1;
  pointer-events: auto;
}

.proceed-link:hover {
  color: #b5502f;
  border-color: #b5502f;
}

@keyframes shake {
  10%, 90% { transform: translateX(-2px); }
  20%, 80% { transform: translateX(4px); }
  30%, 50%, 70% { transform: translateX(-8px); }
  40%, 60% { transform: translateX(8px); }
}