:root {
  --od: #3d4a2c;
  --od-deep: #1c2216;
  --sand: #c4a574;
  --concrete: #8a877c;
  --hud: #b7d59a;
  --hud-dim: rgba(183, 213, 154, 0.55);
  --danger: #c45c2a;
  --panel: rgba(18, 22, 14, 0.88);
  --font-ui: "Noto Sans SC", "PingFang SC", sans-serif;
  --font-mono: "Share Tech Mono", ui-monospace, monospace;
}

* {
  box-sizing: border-box;
}

html,
body.fps-body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background:
    radial-gradient(ellipse 70% 50% at 20% 10%, rgba(180, 200, 140, 0.35), transparent 55%),
    radial-gradient(ellipse 60% 40% at 90% 80%, rgba(196, 165, 116, 0.22), transparent 50%),
    linear-gradient(165deg, #3a4530 0%, #5a6a48 45%, #2f3828 100%);
  color: #e8e2d4;
  font-family: var(--font-ui);
}

canvas {
  display: block;
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hidden {
  display: none !important;
}

.overlay-panel {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 1.25rem;
  padding: 1.5rem;
  background:
    linear-gradient(180deg, rgba(12, 16, 10, 0.72), rgba(12, 16, 10, 0.88)),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 3px,
      rgba(183, 213, 154, 0.03) 3px,
      rgba(183, 213, 154, 0.03) 4px
    );
}

.fps-brand {
  text-align: center;
  max-width: 36rem;
}

.fps-brand .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--hud-dim);
  font-size: 0.85rem;
}

.fps-brand .eyebrow a {
  color: var(--hud);
  text-decoration: none;
}

.fps-brand h1 {
  margin: 0.55rem 0 0.35rem;
  font-size: clamp(2.4rem, 6vw, 3.8rem);
  font-weight: 700;
  letter-spacing: 0.2em;
  color: #f0ebe0;
  text-shadow: 0 2px 0 rgba(0, 0, 0, 0.45);
}

.fps-brand .tagline {
  margin: 0;
  color: rgba(232, 226, 212, 0.72);
  letter-spacing: 0.08em;
}

.mode-pick,
.controls-help {
  width: min(720px, 100%);
  background: var(--panel);
  border: 1px solid rgba(183, 213, 154, 0.22);
  border-radius: 14px;
  padding: 1rem 1.1rem 1.15rem;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}

.mode-pick h2,
.controls-help h2,
#pause h2,
#result h2,
#webgl-fail h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--hud);
  font-weight: 400;
}

.mode-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
}

.mode-card {
  appearance: none;
  text-align: left;
  border: 1px solid rgba(183, 213, 154, 0.28);
  border-radius: 12px;
  padding: 1rem;
  background: linear-gradient(160deg, rgba(90, 107, 58, 0.28), rgba(28, 34, 22, 0.9));
  color: inherit;
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.mode-card:hover {
  transform: translateY(-2px);
  border-color: rgba(183, 213, 154, 0.65);
  background: linear-gradient(160deg, rgba(90, 107, 58, 0.42), rgba(28, 34, 22, 0.95));
}

.mode-code {
  display: block;
  font-family: var(--font-mono);
  color: var(--hud);
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  margin-bottom: 0.35rem;
}

.mode-card strong {
  display: block;
  font-size: 1.25rem;
  letter-spacing: 0.08em;
  margin-bottom: 0.4rem;
}

.mode-card p {
  margin: 0;
  color: rgba(232, 226, 212, 0.75);
  font-size: 0.9rem;
  line-height: 1.5;
}

.controls-help ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.4rem;
  color: rgba(232, 226, 212, 0.8);
  font-size: 0.92rem;
}

kbd {
  display: inline-block;
  min-width: 1.4rem;
  padding: 0.1rem 0.35rem;
  margin-right: 0.15rem;
  border: 1px solid rgba(183, 213, 154, 0.35);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--hud);
  background: rgba(0, 0, 0, 0.25);
  text-align: center;
}

.menu-note,
.back-link,
#pause p,
#result p,
#webgl-fail p {
  margin: 0;
  color: rgba(232, 226, 212, 0.65);
  font-size: 0.9rem;
}

.back-link a {
  color: var(--hud);
  text-decoration: none;
}

.pause-actions {
  display: flex;
  gap: 0.65rem;
  flex-wrap: wrap;
  justify-content: center;
}

.pause-actions button,
.overlay-panel > button {
  appearance: none;
  border: none;
  border-radius: 10px;
  padding: 0.7rem 1.1rem;
  background: #5a6b3a;
  color: #f4f7ec;
  font-family: var(--font-ui);
  letter-spacing: 0.06em;
  cursor: pointer;
}

.pause-actions button.secondary {
  background: transparent;
  border: 1px solid rgba(183, 213, 154, 0.4);
  color: var(--hud);
}

.hud {
  position: fixed;
  inset: 0;
  z-index: 10;
  pointer-events: none;
}

.hud-top {
  position: absolute;
  top: 1rem;
  left: 1rem;
  right: 1rem;
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
}

.hud-chip {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--hud);
  background: rgba(12, 16, 10, 0.55);
  border: 1px solid rgba(183, 213, 154, 0.25);
  border-radius: 8px;
  padding: 0.45rem 0.7rem;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.hud-chip.streak {
  border-color: rgba(255, 180, 90, 0.45);
  color: #ffe2b0;
}

.hud-chip.streak.hot {
  border-color: rgba(255, 120, 80, 0.7);
  color: #ffd0a8;
  box-shadow: 0 0 12px rgba(255, 120, 60, 0.25);
}

.hud-chip.lives {
  border-color: rgba(140, 200, 255, 0.4);
  color: #cfe6ff;
}

.kill-feed {
  position: absolute;
  right: 1rem;
  top: 4.8rem;
  width: min(18rem, 42vw);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  pointer-events: none;
  z-index: 7;
}

.kill-feed div {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: #e8f0d8;
  background: rgba(8, 12, 8, 0.62);
  border: 1px solid rgba(183, 213, 154, 0.22);
  border-radius: 6px;
  padding: 0.28rem 0.5rem;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.7);
}

.phase-banner {
  position: absolute;
  top: 22%;
  left: 50%;
  transform: translateX(-50%);
  z-index: 8;
  pointer-events: none;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  color: #f4ffe8;
  background: rgba(8, 12, 8, 0.78);
  border: 1px solid rgba(183, 213, 154, 0.5);
  border-radius: 10px;
  padding: 0.55rem 1rem;
  text-align: center;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.85);
}

.phase-banner.warn {
  color: #ffe8c8;
  border-color: rgba(255, 180, 90, 0.65);
  background: rgba(30, 16, 8, 0.82);
}

.hud-bottom {
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  display: grid;
  grid-template-columns: 1.2fr 1fr 0.8fr;
  gap: 0.75rem;
}

.stat {
  background: rgba(12, 16, 10, 0.55);
  border: 1px solid rgba(183, 213, 154, 0.22);
  border-radius: 10px;
  padding: 0.55rem 0.75rem;
  color: var(--hud);
}

.stat label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  opacity: 0.75;
  margin-bottom: 0.25rem;
}

.stat b {
  font-size: 1.25rem;
  font-weight: 600;
}

.stat.ammo {
  text-align: center;
}

.stat.kills {
  text-align: right;
}

.stat.kills b {
  font-family: var(--font-mono);
  font-size: 1.55rem;
  letter-spacing: 0.04em;
  color: #e8f5c8;
}

.weapon-strip {
  position: absolute;
  left: 50%;
  bottom: 5.6rem;
  transform: translateX(-50%);
  display: flex;
  gap: 0.4rem;
  pointer-events: none;
  z-index: 6;
}

.weapon-slot {
  min-width: 4.4rem;
  padding: 0.35rem 0.5rem 0.4rem;
  background: rgba(10, 14, 9, 0.62);
  border: 1px solid rgba(183, 213, 154, 0.2);
  border-radius: 8px;
  color: rgba(210, 230, 190, 0.72);
  text-align: center;
  font-family: var(--font-mono);
  line-height: 1.15;
}

.weapon-slot.active {
  color: #f2f7e6;
  border-color: rgba(220, 236, 170, 0.7);
  background: rgba(28, 38, 18, 0.82);
  box-shadow: 0 0 0 1px rgba(196, 165, 116, 0.25);
}

.weapon-slot.empty {
  opacity: 0.38;
  border-style: dashed;
}

.weapon-slot .slot-key {
  display: block;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  opacity: 0.7;
}

.weapon-slot .slot-name {
  display: block;
  font-size: 0.86rem;
  font-weight: 600;
  margin: 0.1rem 0;
  letter-spacing: 0.04em;
}

.weapon-slot .slot-ammo {
  display: block;
  font-size: 0.68rem;
  opacity: 0.75;
}

.capture-hud {
  position: absolute;
  left: 50%;
  top: 4.6rem;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 0.55rem;
  min-width: 16rem;
  padding: 0.4rem 0.7rem;
  background: rgba(10, 14, 9, 0.66);
  border: 1px solid rgba(183, 213, 154, 0.28);
  border-radius: 999px;
  color: #e4efd0;
  font-family: var(--font-mono);
  z-index: 6;
  pointer-events: none;
}

.capture-hud.contested {
  border-color: rgba(255, 170, 90, 0.55);
  color: #ffe0b8;
}

.capture-hud.capturing {
  border-color: rgba(150, 210, 120, 0.6);
}

.capture-track {
  flex: 1;
  height: 7px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  overflow: hidden;
}

.capture-track i {
  display: block;
  height: 100%;
  width: 100%;
  transform-origin: left center;
  transform: scaleX(0);
  background: linear-gradient(90deg, #8faf5a, #d7e89a);
}

.capture-hud.contested .capture-track i {
  background: linear-gradient(90deg, #c47a3a, #ffc078);
}

.capture-hud b {
  font-size: 0.85rem;
  min-width: 2.6rem;
  text-align: right;
}

.capture-hud span {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  opacity: 0.85;
  white-space: nowrap;
}

.stat.ammo small {
  display: block;
  margin-top: 0.15rem;
  color: var(--hud-dim);
  letter-spacing: 0.08em;
}

.stat.ammo b[data-reload]::after {
  content: " · " attr(data-reload);
  font-size: 0.72rem;
  color: #ffcf4d;
  letter-spacing: 0.04em;
}

.reload-track {
  margin-top: 0.35rem;
  height: 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  overflow: hidden;
}

.reload-track i {
  display: block;
  height: 100%;
  width: 100%;
  transform-origin: left center;
  transform: scaleX(0);
  background: linear-gradient(90deg, #c4a574, #ffe08a);
}

.hud.reloading .stat.ammo {
  border-color: rgba(255, 207, 77, 0.55);
}

.hud.empty-mag .stat.ammo b {
  color: #ffb4a2;
}

.medkit-text {
  display: block;
  margin-top: 0.2rem;
  color: #9fdf9a;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  min-height: 0.9em;
}

.hit-dir {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 0;
  height: 0;
  display: grid;
  place-items: center;
  color: #ff7043;
  font-size: 1.35rem;
  text-shadow: 0 0 10px rgba(255, 80, 40, 0.85);
  pointer-events: none;
  z-index: 6;
  /* 箭头绕准星旋转，半径约 22vh */
  transform: translate(-50%, -50%) rotate(var(--hit-rot, 0deg)) translateY(-22vh);
}

.bar {
  height: 8px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 0.3rem;
}

.bar i {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, #6f8a45, #b7d59a);
  transform-origin: left center;
  transform: scaleX(1);
}

.crosshair {
  --ch-gap: 6px;
  position: absolute;
  left: 50%;
  top: 50%;
  width: 22px;
  height: 22px;
  transform: translate(-50%, -50%);
}

.crosshair span {
  position: absolute;
  background: rgba(183, 213, 154, 0.9);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.35);
  transition: top 0.08s linear, bottom 0.08s linear, left 0.08s linear, right 0.08s linear;
}

.crosshair span:nth-child(1),
.crosshair span:nth-child(2) {
  left: 50%;
  width: 2px;
  height: 7px;
  transform: translateX(-50%);
}

.crosshair span:nth-child(1) {
  top: calc(-1 * var(--ch-gap));
}
.crosshair span:nth-child(2) {
  bottom: calc(-1 * var(--ch-gap));
}

.crosshair span:nth-child(3),
.crosshair span:nth-child(4) {
  top: 50%;
  height: 2px;
  width: 7px;
  transform: translateY(-50%);
}

.crosshair span:nth-child(3) {
  left: calc(-1 * var(--ch-gap));
}
.crosshair span:nth-child(4) {
  right: calc(-1 * var(--ch-gap));
}

.crosshair.ads span {
  background: rgba(230, 240, 200, 0.95);
}

.crosshair.fire {
  transform: translate(-50%, -50%) scale(1.12);
}

.hit-marker {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 18px;
  height: 18px;
  transform: translate(-50%, -50%) scale(0.6);
  opacity: 0;
  border: 2px solid #e8d48a;
  border-radius: 2px;
  rotate: 45deg;
  transition: opacity 80ms linear, transform 90ms ease-out;
  z-index: 6;
}

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

.hit-marker.headshot {
  border-color: #ffcf4d;
  box-shadow: 0 0 10px rgba(255, 207, 77, 0.85);
  width: 22px;
  height: 22px;
}

.hit-marker.kill {
  width: 28px;
  height: 28px;
  border-width: 3px;
  border-color: #f0e6a8;
  box-shadow: 0 0 16px rgba(240, 230, 168, 0.9);
  transform: translate(-50%, -50%) scale(1.35);
}

.hit-marker.kill.headshot {
  border-color: #ffd76a;
  box-shadow: 0 0 20px rgba(255, 215, 106, 0.95);
  width: 32px;
  height: 32px;
}

.kill-confirm {
  position: absolute;
  left: 50%;
  top: calc(50% + 2.4rem);
  transform: translateX(-50%) translateY(6px);
  font-family: var(--font-mono);
  letter-spacing: 0.18em;
  font-size: 0.85rem;
  color: #f4ffe8;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.9);
  opacity: 0;
  pointer-events: none;
  z-index: 7;
  transition: opacity 100ms ease, transform 120ms ease;
}

.kill-confirm.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.kill-confirm.headshot {
  color: #ffe08a;
  letter-spacing: 0.22em;
}

.kill-flash {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  background: radial-gradient(
    ellipse at center,
    rgba(255, 240, 180, 0.22) 0%,
    rgba(255, 220, 120, 0.08) 35%,
    transparent 65%
  );
  z-index: 5;
  transition: opacity 80ms linear;
}

.kill-flash.on {
  opacity: 1;
}

.kill-flash.headshot {
  background: radial-gradient(
    ellipse at center,
    rgba(255, 210, 90, 0.28) 0%,
    rgba(255, 180, 60, 0.1) 40%,
    transparent 68%
  );
}

.hud-chip.map {
  border-color: rgba(196, 165, 116, 0.55);
  color: #f0e2c4;
}

.damage-vignette {
  position: absolute;
  inset: 0;
  box-shadow: inset 0 0 80px rgba(196, 92, 42, 0);
  transition: box-shadow 120ms linear;
  pointer-events: none;
}

.damage-vignette.on {
  box-shadow: inset 0 0 90px rgba(196, 92, 42, 0.45);
}

.toast {
  position: absolute;
  top: 18%;
  left: 50%;
  transform: translateX(-50%);
  max-width: min(36rem, 90vw);
  padding: 0.55rem 0.9rem;
  border-radius: 10px;
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  color: #f4ffe8;
  background: rgba(10, 14, 8, 0.82);
  border: 1px solid rgba(183, 213, 154, 0.45);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.85);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  opacity: 0;
  transition: opacity 200ms ease;
  text-align: center;
  pointer-events: none;
}

.toast.show {
  opacity: 1;
}

.zone-hint {
  position: absolute;
  top: 4.2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: rgba(12, 16, 10, 0.72);
  border: 1px solid rgba(126, 200, 227, 0.45);
  color: #d7f3ff;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  pointer-events: none;
  z-index: 5;
}

.zone-hint.outside {
  border-color: rgba(196, 92, 42, 0.7);
  color: #ffd2b8;
  animation: zonePulse 1.1s ease-in-out infinite;
}

.zone-arrow {
  display: inline-block;
  font-size: 0.95rem;
  line-height: 1;
  transform-origin: center;
}

@keyframes zonePulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.72; }
}

@media (max-width: 720px) {
  .mode-grid {
    grid-template-columns: 1fr;
  }

  .hud-bottom {
    grid-template-columns: 1fr;
  }
}