:root {
  --wall: #c4b26a;
  --carpet: #8a7a3e;
  --ink: #1a1810;
  --fluorescent: #e8e0b8;
  --damp: #6b5e32;
  --void: #050505;
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--ink);
  color: var(--fluorescent);
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  cursor: default;
  user-select: none;
}

.back-link {
  position: fixed;
  top: 14px;
  left: 16px;
  z-index: 40;
  color: rgba(232, 224, 184, 0.55);
  text-decoration: none;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.back-link:hover { color: var(--fluorescent); }

#c {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  background: #0c0b08;
}

.start {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: grid;
  place-items: center;
  background:
    radial-gradient(ellipse at 50% 35%, rgba(196, 178, 106, 0.18), transparent 55%),
    linear-gradient(180deg, #1c1912 0%, #0c0b08 70%);
}

.start::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 3px,
      rgba(0, 0, 0, 0.04) 3px,
      rgba(0, 0, 0, 0.04) 4px
    );
  pointer-events: none;
  opacity: 0.7;
}

.start-inner {
  position: relative;
  text-align: center;
  max-width: 28rem;
  padding: 2rem;
}

.eyebrow {
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: rgba(232, 224, 184, 0.45);
  margin-bottom: 0.75rem;
}

.start h1 {
  font-family: "Special Elite", "Courier New", serif;
  font-weight: 400;
  font-size: clamp(3rem, 8vw, 4.5rem);
  letter-spacing: 0.04em;
  color: var(--wall);
  text-shadow: 0 0 40px rgba(196, 178, 106, 0.25);
  margin-bottom: 0.85rem;
  animation: hum 4.5s ease-in-out infinite;
}

.tag {
  font-size: 13px;
  line-height: 1.55;
  color: rgba(232, 224, 184, 0.62);
  margin-bottom: 1.75rem;
}

#btn-enter {
  appearance: none;
  border: 1px solid rgba(196, 178, 106, 0.55);
  background: rgba(26, 24, 16, 0.65);
  color: var(--fluorescent);
  font-family: inherit;
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.95rem 1.6rem;
  cursor: pointer;
  transition: background 160ms ease, border-color 160ms ease, transform 160ms ease;
}
#btn-enter:hover {
  background: rgba(196, 178, 106, 0.14);
  border-color: var(--wall);
  transform: translateY(-1px);
}
#btn-enter:active { transform: translateY(0); }

.hint {
  margin-top: 1.1rem;
  font-size: 11px;
  color: rgba(232, 224, 184, 0.35);
  letter-spacing: 0.04em;
}

.hud {
  position: fixed;
  inset: 0;
  z-index: 20;
  pointer-events: none;
}
.hud.hidden { display: none; }

.mark {
  position: absolute;
  left: 16px;
  bottom: 14px;
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(232, 224, 184, 0.28);
}

.presence {
  position: absolute;
  right: 16px;
  bottom: 14px;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(232, 224, 184, 0.22);
}

@keyframes hum {
  0%, 100% { opacity: 0.92; filter: brightness(1); }
  48% { opacity: 1; filter: brightness(1.05); }
  52% { opacity: 0.78; filter: brightness(0.88); }
  56% { opacity: 1; filter: brightness(1.02); }
}

body.playing .start { display: none; }
body.playing .back-link { opacity: 0.35; }