/* ============================================================
   hud.css — Belter telemetry chrome
   top + bottom HUD strips, keymap overlay
   ============================================================ */

.hud {
  position: fixed;
  left: 0; right: 0;
  z-index: 800;
  font-family: var(--ff-mono);
  font-size: var(--fs-hud);
  letter-spacing: var(--tracking-mono);
  color: var(--amber);
  text-shadow: var(--glow-amber);
  text-transform: uppercase;
  background: linear-gradient(to bottom,
    color-mix(in oklab, var(--bg-deep) 88%, transparent),
    color-mix(in oklab, var(--bg-deep) 60%, transparent));
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border-bottom: 1px solid color-mix(in oklab, var(--amber) 20%, transparent);
  user-select: none;
  pointer-events: none;
}
.hud--top { top: 0; }
.hud--bot {
  top: auto;
  bottom: 0;
  border-bottom: 0;
  border-top: 1px solid color-mix(in oklab, var(--moss) 30%, transparent);
  background: linear-gradient(to top,
    color-mix(in oklab, var(--bg-deep) 88%, transparent),
    color-mix(in oklab, var(--bg-deep) 60%, transparent));
  color: var(--lichen-dim);
  text-shadow: none;
}

.hud__row {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 8px var(--gutter);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.hud__cell { display: inline-flex; align-items: center; gap: 6px; pointer-events: auto; }
.hud__cell .sep { color: var(--moss); margin: 0 4px; pointer-events: none; }
.hud__spacer { flex: 1; }

.hud__brand { color: var(--biolum); text-shadow: var(--glow-biolum); }

.hud__btn {
  appearance: none;
  background: transparent;
  border: 1px solid color-mix(in oklab, var(--amber) 30%, transparent);
  color: var(--amber);
  font: inherit;
  letter-spacing: inherit;
  text-transform: inherit;
  padding: 2px 8px;
  cursor: pointer;
  pointer-events: auto;
  transition: background var(--t-fast), border-color var(--t-fast), color var(--t-fast);
}
.hud__btn:hover,
.hud__btn:focus-visible {
  background: color-mix(in oklab, var(--amber) 18%, transparent);
  border-color: var(--amber);
  outline: none;
}
.hud__btn[aria-pressed="true"] {
  color: var(--bg-deep);
  background: var(--amber);
  text-shadow: none;
}

.hud__dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--moss);
  display: inline-block;
}
.hud__dot.live {
  background: var(--biolum);
  box-shadow: var(--glow-biolum);
  animation: pulse 2.6s ease-in-out infinite;
}

@media (max-width: 720px) {
  .hud__cell.compact-hide { display: none; }
  .hud__row { gap: 10px; padding: 6px 16px; font-size: 10px; }
}

/* ------------ help overlay ------------ */
.help {
  position: fixed;
  inset: 0;
  z-index: 1100;
  display: grid;
  place-items: center;
  background: color-mix(in oklab, var(--bg-deep) 90%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-fast);
}
.help.open {
  opacity: 1;
  pointer-events: auto;
}
.help__panel {
  background: var(--bg-panel);
  clip-path: var(--bevel);
  padding: 36px 44px;
  max-width: min(640px, 92vw);
  font-family: var(--ff-mono);
  color: var(--lichen);
  position: relative;
}
.help__panel::before {
  content: "";
  position: absolute;
  inset: 0;
  clip-path: var(--bevel);
  padding: 1px;
  background: var(--biolum-soft);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
          mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
}
.help__title {
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
  color: var(--amber);
  text-shadow: var(--glow-amber);
  margin: 0 0 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.help__title::before {
  content: "§";
  color: var(--biolum);
  text-shadow: var(--glow-biolum);
}
.help table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.help th, .help td {
  text-align: left;
  padding: 7px 12px 7px 0;
  border-bottom: 1px dashed var(--moss-dim);
}
.help th {
  color: var(--amber);
  font-weight: 500;
  text-transform: uppercase;
  font-size: 10px;
  letter-spacing: var(--tracking-mono);
}
.help td:first-child { width: 14ch; }
.help kbd { margin-right: 4px; }
.help__hint {
  margin: 16px 0 0;
  font-size: 11px;
  color: var(--lichen-dim);
  letter-spacing: var(--tracking-mono);
  text-transform: uppercase;
}

/* ------------ scroll-jump indicator (j/k feedback) ------------ */
.section.is-current .section__label {
  color: var(--biolum);
  text-shadow: var(--glow-biolum);
}
.section.is-current .section__label::before {
  content: "▸ ";
}