:root{
  --glass-bg: rgba(255,255,255,0.06);
  --glass-border: rgba(255,255,255,0.14);
  --glass-strong: rgba(255,255,255,0.09);
  --text: rgba(255,255,255,0.92);
  --muted: rgba(255,255,255,0.65);
  --glow: rgba(120,180,255,0.28);
  --accent: rgba(170,220,255,0.9);
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  background: #000;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

/* Three canvas will be appended to body */
canvas {
  display: block;
}

/* =========================
   UI LAYER
========================= */
#ui{
  position: fixed;
  inset: 0;
  pointer-events: none; /* allow clicks only on specific items we re-enable */
}

/* Header */
#main-header{
  pointer-events: auto;
  position: fixed;
  top: 5.5%;
  left: 50%;
  transform: translateX(-50%);
  margin: 0;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text);
  font-size: clamp(14px, 1.4vw, 18px);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  backdrop-filter: blur(10px) saturate(120%);
  box-shadow:
    0 8px 30px rgba(0,0,0,0.35),
    0 0 24px var(--glow);
  cursor: pointer;
  user-select: none;
  transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

#main-header:hover{
  border-color: rgba(255,255,255,0.28);
  background: var(--glass-strong);
  box-shadow:
    0 10px 36px rgba(0,0,0,0.4),
    0 0 34px var(--glow);
  transform: translateX(-50%) translateY(-1px);
}

/* The "NULL" tag hover you asked for */
.null-tag{
  display: inline-block;
  padding: 2px 8px 3px 8px;
  margin-right: 8px;
  border-radius: 8px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  color: var(--accent);
  letter-spacing: 0.18em;
  transition: background 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease, color 0.18s ease;
}

#main-header:hover .null-tag,
.null-tag:hover{
  background: rgba(170,220,255,0.16);
  border-color: rgba(170,220,255,0.45);
  color: #ffffff;
  box-shadow: 0 0 14px rgba(170,220,255,0.35);
  transform: translateY(-0.5px);
}

.header-rest{
  color: var(--text);
}

/* Status line */
#status{
  pointer-events: none;
  position: fixed;
  left: 50%;
  bottom: 5.5%;
  transform: translateX(-50%);
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--muted);
  font-size: clamp(10px, 1vw, 12.5px);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  backdrop-filter: blur(10px) saturate(120%);
  box-shadow:
    0 8px 26px rgba(0,0,0,0.35),
    0 0 22px var(--glow);
}

/* =========================
   INFO CARDS
========================= */
#info-layer{
  position: fixed;
  inset: 0;
  pointer-events: none;
}

.info-card{
  position: absolute;
  max-width: min(360px, 80vw);
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text);
  font-size: 0.92rem;
  letter-spacing: 0.02em;
  backdrop-filter: blur(10px) saturate(120%);
  box-shadow:
    0 10px 26px rgba(0,0,0,0.32),
    0 0 22px var(--glow);
  opacity: 0;
  transform: translate3d(0,0,0) scale(0.98);
  transition: opacity 0.22s ease, transform 0.22s ease;
  pointer-events: auto; /* clickable */
  cursor: pointer;
  user-select: none;
}

.info-card.show{
  opacity: 1;
  transform: translate3d(0,0,0) scale(1);
}

.info-card.fade{
  opacity: 0 !important;
  transform: translate3d(0,0,0) scale(0.985) !important;
}

/* =========================
   TERMINAL OVERLAY
========================= */
#terminal-layer{
  position: fixed;
  inset: 0;
  pointer-events: none; /* enabled per terminal */
}

/* The glass terminal window */
.terminal-window{
  pointer-events: auto;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: min(720px, 92vw);
  min-height: 220px;
  border-radius: 18px;
  background: rgba(255,255,255,0.075);
  border: 1px solid rgba(255,255,255,0.18);
  backdrop-filter: blur(14px) saturate(120%);
  box-shadow:
    0 24px 70px rgba(0,0,0,0.55),
    0 0 40px var(--glow);
  overflow: hidden;
  opacity: 0;
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.terminal-window.show{
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

/* Terminal header bar */
.terminal-bar{
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: rgba(255,255,255,0.06);
  border-bottom: 1px solid rgba(255,255,255,0.12);
}

.terminal-dot{
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.22);
  box-shadow: 0 0 10px rgba(255,255,255,0.08);
}

.terminal-title{
  margin-left: 6px;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--muted);
  text-transform: uppercase;
}

/* Close button */
.terminal-close{
  margin-left: auto;
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(255,255,255,0.06);
  color: var(--text);
  font-size: 10px;
  letter-spacing: 0.18em;
  padding: 6px 10px;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.terminal-close:hover{
  background: rgba(170,220,255,0.12);
  border-color: rgba(170,220,255,0.4);
  box-shadow: 0 0 14px rgba(170,220,255,0.25);
}

/* Terminal body text */
.terminal-body{
  padding: 18px 18px 22px 18px;
  color: var(--text);
  font-size: clamp(12.5px, 1.1vw, 14.5px);
  line-height: 1.45;
  letter-spacing: 0.03em;
  white-space: pre-wrap;
}

/* caret */
.terminal-caret{
  display: inline-block;
  width: 8px;
  height: 1.05em;
  margin-left: 2px;
  background: rgba(255,255,255,0.75);
  transform: translateY(2px);
  animation: blink 1s steps(1) infinite;
}

@keyframes blink{
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}