* {
  box-sizing: border-box;
}

:root {
  --bg: #050b13;
  --panel: rgba(9, 15, 22, 0.8);
  --line: rgba(125, 214, 255, 0.4);
  --cyan: #7fe9ff;
  --text: #eafaff;
  --danger: #ff6b6b;
  --gold: #f8d77f;
  --purple: #a76cff;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: "Segoe UI", Tahoma, sans-serif;
  background:
    radial-gradient(circle at top, rgba(127, 233, 255, 0.12), transparent 28%),
    linear-gradient(180deg, #02070d 0%, #07141d 100%);
  color: var(--text);
  overflow: hidden;
}

body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  padding: 12px;
  gap: 10px;
}

body::before {
  content: "";
  position: fixed;
  inset: -20%;
  background:
    radial-gradient(circle at 20% 15%, rgba(167, 108, 255, 0.16), transparent 45%),
    radial-gradient(circle at 82% 78%, rgba(127, 233, 255, 0.14), transparent 42%);
  animation: aurora 14s ease-in-out infinite alternate;
  pointer-events: none;
  z-index: -1;
}

@keyframes aurora {
  from { transform: translate3d(-2%, -1%, 0) scale(1); }
  to { transform: translate3d(2%, 2%, 0) scale(1.08); }
}

/* ------------------------------- HUD ------------------------------- */

.hud {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: stretch;
  gap: 16px;
  width: min(1100px, 100%);
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(10, 22, 33, 0.92), rgba(5, 12, 18, 0.86));
  backdrop-filter: blur(6px);
  box-shadow: 0 0 22px rgba(127, 233, 255, 0.1), inset 0 1px 0 rgba(127, 233, 255, 0.14);
  overflow: hidden;
  flex: 0 0 auto;
}

.hud::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(127, 233, 255, 0.14), transparent);
  transform: translateX(-100%);
  animation: hudSweep 5.5s linear infinite;
  pointer-events: none;
}

@keyframes hudSweep {
  to { transform: translateX(100%); }
}

.hud.danger {
  border-color: rgba(255, 93, 115, 0.8);
  animation: dangerPulse 0.85s ease-in-out infinite;
}

@keyframes dangerPulse {
  0%, 100% { box-shadow: 0 0 16px rgba(255, 93, 115, 0.18); }
  50% { box-shadow: 0 0 34px rgba(255, 93, 115, 0.7); }
}

.stat {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  min-width: 148px;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #b7e4ff;
}

.stat-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
}

.stat-head b {
  color: var(--cyan);
  font-size: 0.86rem;
  letter-spacing: 0.06em;
  text-shadow: 0 0 12px rgba(127, 233, 255, 0.85);
}

.bar {
  position: relative;
  height: 8px;
  border-radius: 999px;
  background: rgba(127, 233, 255, 0.12);
  box-shadow: inset 0 0 8px rgba(0, 0, 0, 0.75);
  overflow: hidden;
}

.fill {
  position: relative;
  display: block;
  height: 100%;
  width: 100%;
  border-radius: 999px;
  transition: width 0.14s linear;
}

.fill::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.65), transparent);
  transform: translateX(-100%);
  animation: shimmer 1.9s ease-in-out infinite;
}

.fill.hp { background: linear-gradient(90deg, #ff3d68, #ff9d7a); box-shadow: 0 0 14px rgba(255, 61, 104, 0.75); }
.fill.ox { background: linear-gradient(90deg, #2ad8ff, #8affd9); box-shadow: 0 0 14px rgba(42, 216, 255, 0.75); }
.fill.st { background: linear-gradient(90deg, #ffd166, #a76cff); box-shadow: 0 0 14px rgba(167, 108, 255, 0.75); }

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  60%, 100% { transform: translateX(100%); }
}

.stat.plain .label {
  display: block;
  color: #7fa8c2;
  font-size: 0.62rem;
}

.stat.plain .value {
  color: var(--cyan);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-shadow: 0 0 12px rgba(127, 233, 255, 0.7);
}

.stat.plain.wide {
  flex: 1;
  min-width: 210px;
}

/* ----------------------------- Viewport ---------------------------- */

.viewport {
  position: relative;
  width: min(1100px, 100%);
  flex: 1 1 auto;
  min-height: 0;
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  background: #030914;
  box-shadow: 0 0 26px rgba(127, 233, 255, 0.12), inset 0 0 30px rgba(127, 233, 255, 0.05);
}

#gameCanvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: crosshair;
}

.visor {
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: 18px;
  box-shadow:
    inset 0 0 120px rgba(0, 12, 20, 0.85),
    inset 0 0 24px rgba(127, 233, 255, 0.14);
  background:
    radial-gradient(circle at 50% 42%, transparent 52%, rgba(3, 12, 20, 0.55) 100%),
    linear-gradient(115deg, rgba(127, 233, 255, 0.07) 0%, transparent 26%, transparent 74%, rgba(167, 108, 255, 0.07) 100%);
  animation: breathe 6s ease-in-out infinite;
}

@keyframes breathe {
  0%, 100% { opacity: 0.82; }
  50% { opacity: 1; }
}

.scanlines {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(127, 233, 255, 0.055) 0px,
    rgba(127, 233, 255, 0.055) 1px,
    transparent 1px,
    transparent 4px
  );
  mix-blend-mode: screen;
}

.vignette {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 50% 50%, transparent 55%, rgba(2, 6, 12, 0.72) 100%);
}

.flash {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  background: rgba(255, 93, 115, 0.55);
  transition: opacity 0.08s linear;
}

.crosshair {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 22px;
  height: 22px;
  transform: translate(-50%, -50%);
  pointer-events: none;
  opacity: 0.8;
}

.crosshair i {
  position: absolute;
  background: rgba(190, 245, 255, 0.9);
  box-shadow: 0 0 8px rgba(127, 233, 255, 0.9);
  border-radius: 2px;
}

.crosshair i:first-child {
  left: 50%;
  top: 0;
  width: 2px;
  height: 8px;
  transform: translateX(-50%);
}

.crosshair i:last-child {
  top: 50%;
  left: 0;
  height: 2px;
  width: 8px;
  transform: translateY(-50%);
}

.prompt {
  position: absolute;
  left: 50%;
  bottom: 8%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px 8px 8px;
  border-radius: 999px;
  border: 1px solid rgba(127, 233, 255, 0.7);
  background: rgba(6, 18, 28, 0.82);
  box-shadow: 0 0 22px rgba(127, 233, 255, 0.35);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #dff7ff;
  animation: promptPulse 1.2s ease-in-out infinite;
  pointer-events: none;
}

.prompt b {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 8px;
  background: var(--cyan);
  color: #04121b;
  font-size: 0.72rem;
}

@keyframes promptPulse {
  0%, 100% { box-shadow: 0 0 14px rgba(127, 233, 255, 0.25); }
  50% { box-shadow: 0 0 30px rgba(127, 233, 255, 0.7); }
}

.lock-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-align: center;
  background: radial-gradient(circle at 50% 50%, rgba(4, 14, 22, 0.72), rgba(2, 7, 12, 0.94));
  backdrop-filter: blur(3px);
  cursor: pointer;
  z-index: 5;
}

.lock-overlay.hidden {
  display: none;
}

.lock-title {
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  letter-spacing: 0.5em;
  font-weight: 700;
  color: #eafcff;
  text-shadow: 0 0 26px rgba(127, 233, 255, 0.85), 0 0 60px rgba(167, 108, 255, 0.6);
  animation: titlePulse 3s ease-in-out infinite;
}

@keyframes titlePulse {
  0%, 100% { opacity: 0.9; }
  50% { opacity: 1; }
}

.lock-sub {
  font-size: 0.82rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--cyan);
}

.lock-keys {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 18px;
  margin-top: 8px;
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(183, 228, 255, 0.65);
}

.lock-keys b {
  color: var(--cyan);
}

.hint {
  flex: 0 0 auto;
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  text-align: center;
  color: rgba(183, 228, 255, 0.5);
}

.hint b {
  color: var(--cyan);
  font-weight: 700;
  text-shadow: 0 0 10px rgba(127, 233, 255, 0.7);
}

/* ---------------------------- Messages ----------------------------- */

.message-box {
  position: fixed;
  left: 50%;
  top: 46%;
  transform: translate(-50%, -50%);
  background: rgba(6, 16, 25, 0.92);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 0 26px rgba(127, 233, 255, 0.18);
  color: var(--text);
  padding: 16px 22px;
  max-width: 520px;
  text-align: center;
  z-index: 20;
  font-size: 0.95rem;
  line-height: 1.6;
  animation: msgPop 0.34s cubic-bezier(0.2, 1.5, 0.5, 1) both;
}

@keyframes msgPop {
  from { transform: translate(-50%, -50%) scale(0.85); opacity: 0; }
  to { transform: translate(-50%, -50%) scale(1); opacity: 1; }
}

.hidden {
  display: none !important;
}

@media (max-width: 760px) {
  .stat {
    min-width: 104px;
    font-size: 0.6rem;
  }

  .stat.plain.wide {
    min-width: 150px;
  }

  .hud {
    gap: 10px;
    padding: 8px 12px;
  }
}