/* ============================================================
   ARMORY BAY 03 — HUD & overlay styling
   ============================================================ */

:root {
  --ink: #d8e6ee;
  --ink-dim: #7d93a3;
  --cyan: #4fd8ff;
  --amber: #ffb84d;
  --red: #ff5d4d;
  --green: #57ff9a;
  --panel: rgba(7, 12, 17, 0.62);
  --panel-line: rgba(79, 216, 255, 0.28);
  --font-stack: "Eurostile", "Bahnschrift", "DIN Alternate", "Avenir Next", "Segoe UI", system-ui, sans-serif;
  --mono-stack: ui-monospace, "SF Mono", "Cascadia Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #05080b;
  color: var(--ink);
  font-family: var(--font-stack);
  -webkit-font-smoothing: antialiased;
}

#scene {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  outline: none;
  touch-action: none;
}

/* ---------- shared HUD block look ---------- */
.hud-block {
  position: fixed;
  z-index: 10;
  background: linear-gradient(160deg, rgba(10, 17, 24, 0.72), rgba(6, 10, 14, 0.55));
  border: 1px solid var(--panel-line);
  border-radius: 4px;
  padding: 10px 14px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.4), 0 8px 30px rgba(0, 0, 0, 0.45);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.hud-block::before {
  content: "";
  position: absolute;
  top: -1px; left: 10px;
  width: 34px; height: 2px;
  background: var(--cyan);
  opacity: 0.85;
}

#hud.idle .hud-block { opacity: 0.12; }
#hud.idle #tooltip { opacity: 1; }

/* ---------- title block ---------- */
#hud-title { top: 18px; left: 18px; min-width: 250px; }

.hud-kicker {
  font-family: var(--mono-stack);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--ink-dim);
  margin-bottom: 6px;
}

#hud-title h1 {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: 0.08em;
  line-height: 1;
}

#hud-title .accent { color: var(--amber); }

.hud-sub {
  font-family: var(--mono-stack);
  font-size: 10.5px;
  letter-spacing: 0.3em;
  color: var(--cyan);
  margin-top: 7px;
}

.hud-status {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-top: 9px;
  font-family: var(--mono-stack);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--ink-dim);
}

.dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
  animation: dot-pulse 2.4s ease-in-out infinite;
}

.dot-red { background: var(--red); box-shadow: 0 0 8px var(--red); }

@keyframes dot-pulse { 50% { opacity: 0.35; } }

/* ---------- action buttons ---------- */
#hud-actions {
  top: 18px;
  right: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
  max-width: 380px;
  background: none;
  border: none;
  box-shadow: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  padding: 0;
}

#hud-actions::before { display: none; }

#hud-actions button, #btn-enter, .fatal-frame button {
  appearance: none;
  cursor: pointer;
  font-family: var(--mono-stack);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--panel-line);
  border-radius: 3px;
  padding: 8px 12px;
  transition: border-color 0.2s, color 0.2s, background 0.2s, transform 0.1s;
}

#hud-actions button:hover, #hud-actions button:focus-visible, #btn-enter:hover, .fatal-frame button:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(16, 34, 44, 0.8);
  outline: none;
}

#hud-actions button:active, #btn-enter:active { transform: translateY(1px); }

#hud-actions button[aria-pressed="true"] {
  border-color: var(--amber);
  color: var(--amber);
}

kbd {
  font-family: var(--mono-stack);
  font-size: 9.5px;
  border: 1px solid rgba(216, 230, 238, 0.35);
  border-bottom-width: 2px;
  border-radius: 3px;
  padding: 1px 4px;
  margin: 0 1px;
}

/* ---------- perf readout ---------- */
#hud-perf {
  bottom: 18px;
  right: 18px;
  font-family: var(--mono-stack);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--ink-dim);
  display: flex;
  gap: 14px;
  padding: 7px 12px;
}

#perf-fps.warn { color: var(--amber); }
#perf-fps.bad { color: var(--red); }

/* ---------- help footer ---------- */
#hud-help { bottom: 18px; left: 18px; max-width: 430px; }

.help-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 14px;
  font-family: var(--mono-stack);
  font-size: 10.5px;
}

.help-grid .k { color: var(--cyan); letter-spacing: 0.14em; }
.help-grid .v { color: var(--ink-dim); }

#hud-help.collapsed { display: none; }

/* ---------- crosshair ---------- */
#crosshair {
  position: fixed;
  left: 50%; top: 50%;
  width: 22px; height: 22px;
  transform: translate(-50%, -50%);
  z-index: 12;
  pointer-events: none;
}

#crosshair::before, #crosshair::after {
  content: "";
  position: absolute;
  background: rgba(216, 230, 238, 0.9);
  box-shadow: 0 0 4px rgba(0, 0, 0, 0.8);
}

#crosshair::before { left: 50%; top: 0; width: 1.5px; height: 100%; transform: translateX(-50%); }
#crosshair::after { top: 50%; left: 0; height: 1.5px; width: 100%; transform: translateY(-50%); }

/* ---------- tooltip ---------- */
#tooltip {
  position: fixed;
  z-index: 20;
  pointer-events: none;
  min-width: 190px;
  max-width: 280px;
  background: linear-gradient(165deg, rgba(9, 16, 22, 0.92), rgba(6, 10, 14, 0.88));
  border: 1px solid rgba(79, 216, 255, 0.5);
  border-left: 3px solid var(--amber);
  border-radius: 3px;
  padding: 9px 12px;
  transform: translate(14px, -50%);
  opacity: 0;
  transition: opacity 0.15s ease;
  box-shadow: 0 10px 34px rgba(0, 0, 0, 0.6);
}

#tooltip.visible { opacity: 1; }

#tooltip .tt-name {
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--amber);
}

#tooltip .tt-sub {
  font-family: var(--mono-stack);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  margin-top: 3px;
}

#tooltip .tt-hint {
  font-family: var(--mono-stack);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  color: var(--ink-dim);
  margin-top: 6px;
  padding-top: 5px;
  border-top: 1px dashed rgba(125, 147, 163, 0.35);
}

/* ---------- toast ---------- */
#toast {
  position: fixed;
  left: 50%;
  bottom: 92px;
  transform: translateX(-50%);
  z-index: 25;
  font-family: var(--mono-stack);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ink);
  background: rgba(9, 16, 22, 0.85);
  border: 1px solid var(--panel-line);
  border-radius: 3px;
  padding: 9px 16px;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

#toast.visible { opacity: 1; }

/* ---------- walk hint ---------- */
#walk-hint {
  position: fixed;
  left: 50%; top: 58%;
  transform: translateX(-50%);
  z-index: 15;
  font-family: var(--mono-stack);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--ink-dim);
  pointer-events: none;
}

/* ---------- intro ---------- */
#intro {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(ellipse at 50% 38%, rgba(20, 40, 52, 0.55), transparent 60%),
    repeating-linear-gradient(0deg, rgba(79, 216, 255, 0.028) 0 1px, transparent 1px 4px),
    #04070a;
  transition: opacity 0.9s ease;
}

#intro.leaving { opacity: 0; pointer-events: none; }
#intro.gone { display: none; }

.intro-frame {
  width: min(520px, calc(100vw - 48px));
  border: 1px solid rgba(79, 216, 255, 0.3);
  background: rgba(7, 12, 17, 0.6);
  padding: 38px 40px 30px;
  text-align: center;
  position: relative;
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.6), inset 0 0 60px rgba(79, 216, 255, 0.04);
}

.intro-frame::before, .intro-frame::after {
  content: "";
  position: absolute;
  width: 18px; height: 18px;
  border: 2px solid var(--cyan);
}

.intro-frame::before { top: -2px; left: -2px; border-right: none; border-bottom: none; }
.intro-frame::after { bottom: -2px; right: -2px; border-left: none; border-top: none; }

.intro-kicker {
  font-family: var(--mono-stack);
  font-size: 10px;
  letter-spacing: 0.34em;
  color: var(--ink-dim);
}

.intro-title {
  font-size: clamp(34px, 6vw, 52px);
  font-weight: 800;
  letter-spacing: 0.1em;
  margin: 12px 0 6px;
  text-shadow: 0 0 34px rgba(79, 216, 255, 0.25);
}

.intro-title .accent { color: var(--amber); }

.intro-sub {
  font-family: var(--mono-stack);
  font-size: 10px;
  letter-spacing: 0.26em;
  color: var(--cyan);
  margin-bottom: 30px;
}

.intro-bar {
  height: 3px;
  background: rgba(79, 216, 255, 0.12);
  border-radius: 2px;
  overflow: hidden;
}

#intro-progress {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--cyan), var(--amber));
  box-shadow: 0 0 12px rgba(79, 216, 255, 0.7);
  transition: width 0.25s ease;
}

#intro-note {
  font-family: var(--mono-stack);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--ink-dim);
  margin: 12px 0 24px;
  min-height: 14px;
}

#btn-enter {
  font-size: 13px;
  letter-spacing: 0.26em;
  padding: 13px 40px;
}

#btn-enter:disabled { opacity: 0.35; cursor: wait; }
#btn-enter:not(:disabled) {
  border-color: var(--amber);
  color: var(--amber);
  animation: enter-pulse 1.8s ease-in-out infinite;
}

@keyframes enter-pulse { 50% { box-shadow: 0 0 22px rgba(255, 184, 77, 0.35); } }

.intro-foot {
  margin-top: 22px;
  font-family: var(--mono-stack);
  font-size: 9px;
  letter-spacing: 0.2em;
  color: rgba(125, 147, 163, 0.6);
}

/* ---------- fatal ---------- */
#fatal {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(4, 7, 10, 0.94);
}

#fatal[hidden], #crosshair[hidden], #walk-hint[hidden], #toast[hidden], #tooltip[hidden] { display: none; }

.fatal-frame { text-align: center; }
.fatal-title { font-size: 26px; letter-spacing: 0.16em; color: var(--red); font-weight: 800; }
.fatal-sub { font-family: var(--mono-stack); font-size: 11px; color: var(--ink-dim); margin: 14px 0 22px; }

/* ---------- responsive / motion ---------- */
@media (max-width: 720px) {
  #hud-title h1 { font-size: 22px; }
  #hud-title { min-width: 0; }
  #hud-help { display: none; }
  #hud-perf { bottom: auto; top: 84px; right: 18px; }
  #hud-actions { max-width: 210px; }
}

@media (prefers-reduced-motion: reduce) {
  .dot, #btn-enter:not(:disabled) { animation: none; }
}