@import url('https://fonts.googleapis.com/css2?family=Share+Tech+Mono&family=Orbitron:wght@400;700;900&display=swap');

:root {
  --green: #00ff88;
  --green-dim: #00cc66;
  --green-dark: #003322;
  --red: #ff3355;
  --red-dim: #cc2244;
  --amber: #ffaa00;
  --bg: #050f0a;
  --surface: #0a1a10;
  --surface2: #0f2418;
  --border: #1a4030;
  --text: #a0d0b0;
  --text-dim: #507060;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Share Tech Mono', monospace;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1rem 4rem;
  background-image:
    radial-gradient(ellipse at 50% 0%, #002a1580 0%, transparent 70%),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(0,255,136,0.015) 2px,
      rgba(0,255,136,0.015) 4px
    );
}

header {
  text-align: center;
  margin-bottom: 3rem;
}

.logo {
  font-family: 'Orbitron', monospace;
  font-size: clamp(1.8rem, 5vw, 3rem);
  font-weight: 900;
  color: var(--green);
  letter-spacing: 0.2em;
  text-shadow:
    0 0 10px var(--green),
    0 0 40px var(--green-dim),
    0 0 80px #00ff8844;
  animation: flicker 8s infinite;
}

.subtitle {
  font-size: 0.75rem;
  color: var(--text-dim);
  letter-spacing: 0.4em;
  margin-top: 0.5rem;
  text-transform: uppercase;
}

.progress-bar-wrap {
  width: 100%;
  max-width: 640px;
  margin-bottom: 2rem;
}

.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  color: var(--text-dim);
  letter-spacing: 0.2em;
  margin-bottom: 0.4rem;
}

.progress-bar {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--green);
  width: 0%;
  transition: width 0.6s ease;
  box-shadow: 0 0 8px var(--green);
}

.puzzles {
  width: 100%;
  max-width: 640px;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.puzzle-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  position: relative;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.puzzle-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 8px;
  pointer-events: none;
  transition: opacity 0.3s;
  opacity: 0;
}

.puzzle-card.solved {
  border-color: var(--green-dim);
  box-shadow: 0 0 20px #00ff8822, inset 0 0 20px #00ff8808;
}

.puzzle-card.failed {
  border-color: var(--red-dim);
  animation: shake 0.4s ease;
}

.puzzle-number {
  font-family: 'Orbitron', monospace;
  font-size: 0.6rem;
  color: var(--text-dim);
  letter-spacing: 0.3em;
  margin-bottom: 0.4rem;
}

.puzzle-title {
  font-family: 'Orbitron', monospace;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--green);
  margin-bottom: 0.75rem;
  letter-spacing: 0.05em;
}

.puzzle-desc {
  font-size: 0.82rem;
  color: var(--text);
  line-height: 1.6;
  margin-bottom: 1.2rem;
}

.input-row {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.code-input {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--green);
  font-family: 'Orbitron', monospace;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  padding: 0.6rem 1rem;
  text-align: center;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  -webkit-appearance: none;
  appearance: none;
}

.code-input:focus {
  border-color: var(--green-dim);
  box-shadow: 0 0 12px #00ff8833;
}

.code-input.correct {
  border-color: var(--green);
  color: var(--green);
  box-shadow: 0 0 16px #00ff8855;
}

.code-input.wrong {
  border-color: var(--red);
  color: var(--red);
  box-shadow: 0 0 16px #ff335533;
}

.code-input:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-check {
  background: transparent;
  border: 1px solid var(--green-dim);
  border-radius: 4px;
  color: var(--green);
  font-family: 'Orbitron', monospace;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  padding: 0.6rem 1rem;
  cursor: pointer;
  transition: background 0.2s, box-shadow 0.2s, color 0.2s;
  white-space: nowrap;
}

.btn-check:hover {
  background: var(--green-dark);
  box-shadow: 0 0 12px #00ff8833;
}

.btn-check:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.feedback {
  margin-top: 0.8rem;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  min-height: 1.2em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  opacity: 0;
  transition: opacity 0.3s;
}

.feedback.show { opacity: 1; }
.feedback.ok { color: var(--green); }
.feedback.err { color: var(--red); }
.feedback.hint { color: var(--amber); }

.status-icon { font-size: 1rem; }

.hint-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.7rem;
  cursor: pointer;
  letter-spacing: 0.1em;
  padding: 0.4rem 0;
  margin-top: 0.4rem;
  text-decoration: underline dotted;
  transition: color 0.2s;
}

.hint-btn:hover { color: var(--amber); }

/* Victory screen */
.victory {
  display: none;
  text-align: center;
  padding: 3rem 2rem;
  background: var(--surface);
  border: 1px solid var(--green);
  border-radius: 8px;
  box-shadow: 0 0 40px #00ff8833, 0 0 80px #00ff8811;
  width: 100%;
  max-width: 640px;
}

.victory.show { display: block; }

.victory-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
  animation: pulse 2s infinite;
}

.victory-title {
  font-family: 'Orbitron', monospace;
  font-size: clamp(1.2rem, 4vw, 2rem);
  font-weight: 900;
  color: var(--green);
  letter-spacing: 0.15em;
  text-shadow: 0 0 20px var(--green);
  margin-bottom: 1rem;
}

.victory-text {
  color: var(--text);
  font-size: 0.9rem;
  line-height: 1.8;
}

/* Animations */
@keyframes flicker {
  0%, 95%, 100% { opacity: 1; }
  96% { opacity: 0.7; }
  97% { opacity: 1; }
  98% { opacity: 0.6; }
  99% { opacity: 1; }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-8px); }
  40% { transform: translateX(8px); }
  60% { transform: translateX(-5px); }
  80% { transform: translateX(5px); }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

@media (max-width: 480px) {
  .input-row { flex-direction: column; }
  .btn-check { width: 100%; }
}