:root {
  --bg: #050706;
  --green: #a2ffba;
  --dim: #527b60;
  --border: #284333;
  --red: #ff6262;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--green);
  font-family: Consolas, "Courier New", monospace;
  display: grid;
  place-items: center;
  padding: 20px;
}

.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .12;
  background: repeating-linear-gradient(
    0deg, transparent 0px,
    transparent 3px, #35543d 4px
  );
}

.terminal {
  width: min(850px, 100%);
  min-height: 600px;
  border: 1px solid var(--border);
  background: #080c09;
  box-shadow: 0 0 80px #10291a44;
  padding: 30px;
  position: relative;
}

header, footer, .game-top {
  display: flex;
  justify-content: space-between;
  gap: 15px;
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--dim);
}

header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 20px;
}

.status { color: var(--green); }

#intro {
  text-align: center;
  padding: 85px 0;
}

.symbol {
  font-size: 90px;
  animation: pulse 3s infinite;
}

h1 {
  font-size: clamp(55px, 12vw, 100px);
  margin: 0;
  letter-spacing: 15px;
}

h1 span { animation: blink 1s infinite; }

.subtitle {
  color: var(--dim);
  letter-spacing: 4px;
  font-size: 12px;
  margin-bottom: 50px;
}

button {
  font: inherit;
  color: var(--green);
  background: transparent;
  border: 1px solid var(--border);
  padding: 14px 20px;
  cursor: pointer;
  transition: .2s;
}

button:hover {
  background: var(--green);
  color: var(--bg);
  box-shadow: 0 0 25px #a2ffba33;
}

.hidden { display: none !important; }

#game { padding: 35px 0 75px; }

.progress-track {
  height: 3px;
  background: var(--border);
  margin: 18px 0 45px;
}

#progress-bar {
  height: 100%;
  width: 0%;
  background: var(--green);
  transition: width .5s;
}

#story {
  color: var(--dim);
  line-height: 1.8;
  font-size: 13px;
  white-space: pre-line;
}

h2 {
  margin-top: 35px;
  font-size: 20px;
  letter-spacing: 3px;
}

#puzzle-content {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  background: #0d1510;
  padding: 25px;
  border-left: 2px solid var(--green);
  line-height: 1.8;
  font-size: 14px;
}

form { margin-top: 35px; }

label {
  font-size: 11px;
  color: var(--dim);
  letter-spacing: 2px;
}

.answer-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
}

input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border);
  padding: 14px 5px;
  outline: none;
  color: var(--green);
  font: inherit;
}

input:focus { border-color: var(--green); }

#feedback { min-height: 25px; }

.error { color: var(--red); }
.success { color: var(--green); }

#hint {
  font-size: 11px;
  padding: 10px;
}

#hint-text {
  color: var(--dim);
  font-size: 13px;
  line-height: 1.7;
}

footer {
  position: absolute;
  bottom: 25px;
  left: 30px;
  right: 30px;
  border-top: 1px solid var(--border);
  padding-top: 18px;
}

@keyframes blink {
  50% { opacity: 0; }
}

@keyframes pulse {
  50% {
    opacity: .4;
    text-shadow: 0 0 35px var(--green);
  }
}

@media(max-width: 600px) {
  .terminal { padding: 18px; }
  header, footer { font-size: 9px; }
  footer { left: 18px; right: 18px; }
  .answer-row { flex-wrap: wrap; }
  .answer-row button { width: 100%; }
  #intro { padding: 80px 0; }
}