:root {
  color-scheme: dark;
  --bg: #060809;
  --bg-raised: #0b1013;
  --panel: #0d1316;
  --panel-2: #11191d;
  --ink: #eaf6f5;
  --muted: #81969b;
  --faint: #4e6369;
  --line: rgba(165, 205, 211, 0.14);
  --line-bright: rgba(165, 205, 211, 0.26);
  --cyan: #5ee7f2;
  --cyan-soft: #a8f6ff;
  --amber: #ffb45c;
  --amber-hot: #ff8e3c;
  --red: #ff5f6d;
  --green: #8ef0a3;
  --font-display: "Arial Black", "Impact", "Microsoft YaHei", "PingFang SC", sans-serif;
  --font-mono: "Cascadia Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --font-body: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", system-ui, sans-serif;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.55);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--bg);
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(1200px 700px at 14% -12%, rgba(255, 142, 60, 0.12), transparent 62%),
    radial-gradient(1100px 800px at 92% 12%, rgba(94, 231, 242, 0.1), transparent 58%),
    linear-gradient(180deg, #070a0c 0%, #080c0e 48%, #050708 100%);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.36;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 85%);
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.page-glow {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    linear-gradient(115deg, transparent 0 47%, rgba(94, 231, 242, 0.035) 47.1% 47.4%, transparent 47.5% 100%),
    linear-gradient(65deg, transparent 0 69%, rgba(255, 180, 92, 0.035) 69.1% 69.4%, transparent 69.5% 100%);
}

.app {
  position: relative;
  z-index: 1;
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
  padding: 28px 0 24px;
}

/* ---------- Top bar ---------- */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 22px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border: 1px solid var(--line-bright);
  background:
    linear-gradient(135deg, rgba(94, 231, 242, 0.12), transparent 58%),
    #0a1114;
  box-shadow: inset 0 0 24px rgba(94, 231, 242, 0.06);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}

.brand-mark svg {
  width: 33px;
  height: 33px;
  filter: drop-shadow(0 0 9px rgba(94, 231, 242, 0.34));
}

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.brand-kicker {
  color: var(--faint);
  font: 600 8px/1 var(--font-mono);
  letter-spacing: 0.24em;
}

.brand-title {
  font-family: var(--font-display);
  font-size: 25px;
  line-height: 0.96;
  letter-spacing: 0.06em;
  font-weight: 900;
  color: var(--ink);
}

.brand-title::after {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-left: 9px;
  background: var(--amber);
  box-shadow: 0 0 12px rgba(255, 180, 92, 0.65);
  vertical-align: 3px;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 9px;
}

.icon-button,
.text-button {
  appearance: none;
  border: 1px solid var(--line);
  color: var(--muted);
  background: rgba(12, 19, 22, 0.8);
  cursor: pointer;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.icon-button {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  padding: 0;
}

.icon {
  width: 19px;
  height: 19px;
  display: block;
}

.icon-sound-off {
  display: none;
}

.icon-button[aria-pressed="false"] .icon-sound-on {
  display: none;
}

.icon-button[aria-pressed="false"] .icon-sound-off {
  display: block;
}

.text-button {
  display: flex;
  align-items: center;
  gap: 9px;
  height: 40px;
  padding: 0 15px;
  font: 700 11px/1 var(--font-mono);
  letter-spacing: 0.14em;
}

.icon-button:hover,
.text-button:hover {
  color: var(--ink);
  border-color: var(--line-bright);
  background: rgba(22, 33, 38, 0.95);
}

.text-button:disabled {
  opacity: 0.34;
  cursor: not-allowed;
  color: var(--faint);
  border-color: var(--line);
  background: rgba(12, 19, 22, 0.6);
}

.text-button:disabled:hover {
  color: var(--faint);
  border-color: var(--line);
  background: rgba(12, 19, 22, 0.6);
  transform: none;
}

.icon-button:active,
.text-button:active {
  transform: translateY(1px);
}

.pause-glyph {
  display: flex;
  gap: 3px;
}

.pause-glyph i {
  display: block;
  width: 3px;
  height: 10px;
  background: currentColor;
}

/* ---------- Layout ---------- */

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 22px;
  align-items: start;
}

.game-panel {
  min-width: 0;
  padding: 14px 14px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.025), transparent 14%),
    linear-gradient(160deg, #0d1417 0%, #0a0f12 100%);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.035);
  position: relative;
}

.game-panel::before {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px solid rgba(255, 255, 255, 0.025);
  border-radius: 8px;
  pointer-events: none;
}

.hud {
  display: grid;
  grid-template-columns: 0.72fr 1.45fr 1.15fr 0.95fr;
  gap: 0;
  position: relative;
  margin: 0 2px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.hud-cell {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 12px 16px 11px;
  min-width: 0;
}

.hud-cell + .hud-cell {
  border-left: 1px solid rgba(255, 255, 255, 0.065);
}

.hud-label {
  color: var(--faint);
  font: 600 8px/1 var(--font-mono);
  letter-spacing: 0.19em;
  white-space: nowrap;
}

.hud-value {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--ink);
  font: 700 18px/1 var(--font-mono);
  letter-spacing: 0.07em;
  font-variant-numeric: tabular-nums;
}

.hud-score .hud-value {
  color: var(--amber);
}

.hud-enemies .hud-value {
  color: var(--cyan);
}

.mini-tank {
  position: relative;
  display: inline-block;
  width: 17px;
  height: 11px;
  border-radius: 1px;
  background: var(--cyan);
  box-shadow: 0 0 8px rgba(94, 231, 242, 0.35);
}

.mini-tank::before {
  content: "";
  position: absolute;
  left: 5px;
  top: -4px;
  width: 9px;
  height: 6px;
  background: var(--cyan-soft);
}

.mini-tank::after {
  content: "";
  position: absolute;
  left: 9px;
  top: -7px;
  width: 2px;
  height: 5px;
  background: var(--ink);
}

.hud-scan {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  opacity: 0.6;
  overflow: hidden;
  pointer-events: none;
}

.hud-scan span {
  display: block;
  width: 36px;
  height: 1px;
  margin-top: 14px;
  background: linear-gradient(90deg, transparent, var(--amber), transparent);
  animation: hud-scan 3.2s linear infinite;
}

@keyframes hud-scan {
  0% { transform: translateY(-16px); opacity: 0; }
  30% { opacity: 1; }
  70% { opacity: 1; }
  100% { transform: translateY(16px); opacity: 0; }
}

.hud-progress {
  height: 2px;
  margin: 0 2px 12px;
  background: rgba(255, 255, 255, 0.05);
  overflow: hidden;
}

.hud-progress span {
  display: block;
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--amber));
  box-shadow: 0 0 10px rgba(255, 180, 92, 0.35);
  transition: width 400ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* ---------- Screen ---------- */

.screen-frame {
  position: relative;
  aspect-ratio: 1 / 1;
  width: 100%;
  overflow: hidden;
  background: #040607;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 4px;
  isolation: isolate;
  box-shadow:
    inset 0 0 0 3px #070b0d,
    inset 0 0 0 4px rgba(255, 255, 255, 0.04),
    0 10px 40px rgba(0, 0, 0, 0.45);
}

#game {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: crosshair;
  background: #05080a;
}

.screen-fx {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  background:
    repeating-linear-gradient(180deg, rgba(255, 255, 255, 0.022) 0, rgba(255, 255, 255, 0.022) 1px, transparent 1px, transparent 3px),
    radial-gradient(circle at 50% 46%, transparent 46%, rgba(0, 0, 0, 0.35) 100%);
  mix-blend-mode: normal;
  opacity: 0.9;
}

.screen-fx::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(94, 231, 242, 0.035), transparent 24% 76%, rgba(255, 180, 92, 0.025));
  animation: screen-glint 9s ease-in-out infinite;
}

@keyframes screen-glint {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.85; }
}

.screen-corners {
  position: absolute;
  inset: 8px;
  z-index: 4;
  pointer-events: none;
}

.screen-corners::before,
.screen-corners::after {
  content: "";
  position: absolute;
  width: 23px;
  height: 23px;
  border-color: rgba(94, 231, 242, 0.55);
  border-style: solid;
}

.screen-corners::before {
  left: 0;
  top: 0;
  border-width: 1px 0 0 1px;
}

.screen-corners::after {
  right: 0;
  bottom: 0;
  border-width: 0 1px 1px 0;
  border-color: rgba(255, 180, 92, 0.5);
}

/* ---------- Overlay ---------- */

.overlay {
  position: absolute;
  inset: 0;
  z-index: 10;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(circle at 50% 45%, rgba(10, 20, 23, 0.58), rgba(3, 5, 6, 0.9)),
    rgba(4, 7, 8, 0.64);
  backdrop-filter: blur(3px) saturate(0.7);
  transition: opacity 220ms ease, visibility 220ms ease;
}

.overlay.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.overlay-card {
  position: relative;
  width: min(372px, 100%);
  padding: 29px 26px 23px;
  border: 1px solid rgba(140, 196, 202, 0.27);
  background:
    linear-gradient(135deg, rgba(94, 231, 242, 0.075), transparent 36%),
    linear-gradient(180deg, rgba(16, 25, 29, 0.97), rgba(8, 13, 15, 0.98));
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.72), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
  animation: card-in 300ms cubic-bezier(0.2, 0.85, 0.25, 1);
}

.overlay-card::before {
  content: "";
  position: absolute;
  left: 26px;
  top: 0;
  width: 68px;
  height: 2px;
  background: linear-gradient(90deg, var(--amber), transparent);
}

.overlay-card::after {
  content: "";
  position: absolute;
  right: 16px;
  top: 16px;
  width: 6px;
  height: 6px;
  border-top: 1px solid rgba(255, 180, 92, 0.9);
  border-right: 1px solid rgba(255, 180, 92, 0.9);
}

@keyframes card-in {
  from { opacity: 0; transform: translateY(12px) scale(0.985); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.overlay-eyebrow {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 14px;
  color: var(--amber);
  font: 600 8px/1.2 var(--font-mono);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.overlay-eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--amber);
  box-shadow: 0 0 8px rgba(255, 180, 92, 0.55);
}

.overlay-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(32px, 8vw, 44px);
  line-height: 1.05;
  letter-spacing: 0.045em;
  font-weight: 900;
  color: #f4fbfb;
  text-shadow: 0 0 30px rgba(94, 231, 242, 0.12);
}

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

.overlay-desc {
  margin: 13px 0 19px;
  color: #9bacb0;
  font-size: 12px;
  line-height: 1.75;
}

.overlay-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-bottom: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.overlay-stat {
  min-width: 0;
  padding: 11px 8px 10px;
}

.overlay-stat + .overlay-stat {
  border-left: 1px solid rgba(255, 255, 255, 0.07);
}

.overlay-stat small {
  display: block;
  margin-bottom: 5px;
  color: var(--faint);
  font: 600 7px/1 var(--font-mono);
  letter-spacing: 0.16em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.overlay-stat strong {
  display: block;
  color: var(--ink);
  font: 700 15px/1 var(--font-mono);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.overlay-stat strong.amber {
  color: var(--amber);
}

.overlay-stat strong.cyan {
  color: var(--cyan);
}

.primary-button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 48px;
  padding: 0 17px 0 19px;
  border: 1px solid rgba(255, 194, 122, 0.65);
  color: #1b0f03;
  background: linear-gradient(100deg, #ffbd6a, #ff9b45);
  font: 800 13px/1 var(--font-mono);
  letter-spacing: 0.1em;
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 11px) 0, 100% 11px, 100% 100%, 0 100%);
  box-shadow: 0 8px 30px rgba(255, 142, 60, 0.15);
  transition: filter 150ms ease, transform 150ms ease;
}

.primary-button:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
}

.primary-button:active {
  transform: translateY(0);
  filter: brightness(0.96);
}

.button-arrow {
  font: 400 19px/1 var(--font-mono);
  transition: transform 160ms ease;
}

.primary-button:hover .button-arrow {
  transform: translateX(3px);
}

.overlay-hint {
  margin: 13px 0 0;
  color: var(--faint);
  text-align: center;
  font: 500 9px/1.5 var(--font-mono);
  letter-spacing: 0.06em;
}

/* ---------- Toast ---------- */

.toast {
  position: absolute;
  left: 50%;
  bottom: 20px;
  z-index: 8;
  display: flex;
  align-items: center;
  gap: 11px;
  min-width: 180px;
  padding: 9px 14px 9px 10px;
  border: 1px solid rgba(94, 231, 242, 0.27);
  background: rgba(5, 12, 14, 0.9);
  box-shadow: 0 10px 35px rgba(0, 0, 0, 0.5);
  transform: translate(-50%, 12px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 180ms ease, transform 180ms ease, visibility 180ms ease;
  backdrop-filter: blur(4px);
  pointer-events: none;
}

.toast.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

.toast-icon {
  display: grid;
  place-items: center;
  width: 31px;
  height: 31px;
  flex: 0 0 auto;
  border: 1px solid rgba(94, 231, 242, 0.33);
  color: var(--cyan);
  font: 800 16px/1 var(--font-mono);
  background: rgba(94, 231, 242, 0.08);
}

.toast-copy {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.toast-copy strong {
  font: 700 10px/1.2 var(--font-body);
  letter-spacing: 0.06em;
  color: var(--ink);
}

.toast-copy small {
  font: 500 8px/1.2 var(--font-mono);
  color: var(--muted);
  letter-spacing: 0.04em;
}

.toast[data-tone="amber"] {
  border-color: rgba(255, 180, 92, 0.3);
}

.toast[data-tone="amber"] .toast-icon {
  color: var(--amber);
  border-color: rgba(255, 180, 92, 0.35);
  background: rgba(255, 180, 92, 0.08);
}

.toast[data-tone="red"] {
  border-color: rgba(255, 95, 109, 0.34);
}

.toast[data-tone="red"] .toast-icon {
  color: var(--red);
  border-color: rgba(255, 95, 109, 0.38);
  background: rgba(255, 95, 109, 0.08);
}

/* ---------- Sidebar ---------- */

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.side-card {
  position: relative;
  padding: 17px 18px 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.025), transparent 38%),
    rgba(11, 16, 19, 0.86);
  overflow: hidden;
}

.side-card::after {
  content: "";
  position: absolute;
  right: -20px;
  bottom: -28px;
  width: 82px;
  height: 82px;
  border: 1px solid rgba(255, 255, 255, 0.035);
  transform: rotate(45deg);
  pointer-events: none;
}

.side-label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 13px;
  color: var(--faint);
  font: 600 8px/1 var(--font-mono);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.side-label span {
  width: 5px;
  height: 5px;
  background: var(--amber);
  box-shadow: 0 0 8px rgba(255, 180, 92, 0.55);
}

.mission-card {
  border-color: rgba(255, 180, 92, 0.24);
  background:
    linear-gradient(145deg, rgba(255, 180, 92, 0.075), transparent 38%),
    rgba(15, 18, 18, 0.9);
}

.mission-code {
  color: var(--amber);
  font: 600 8px/1 var(--font-mono);
  letter-spacing: 0.13em;
}

.mission-card h2 {
  margin: 8px 0 8px;
  font-family: var(--font-display);
  font-size: 26px;
  line-height: 1.1;
  letter-spacing: 0.03em;
}

.mission-card p {
  margin: 0;
  color: #91a1a4;
  font-size: 11px;
  line-height: 1.8;
}

.mission-meter {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 9px;
  margin-top: 16px;
  color: var(--faint);
  font: 600 8px/1 var(--font-mono);
  letter-spacing: 0.06em;
}

.mission-track {
  height: 3px;
  background: rgba(255, 255, 255, 0.07);
}

.mission-track i {
  display: block;
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--amber-hot), var(--amber));
  transition: width 300ms ease;
}

.controls-list {
  display: flex;
  flex-direction: column;
}

.control-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.045);
}

.control-row:first-child {
  border-top: 0;
  padding-top: 1px;
}

.control-row > span {
  color: var(--muted);
  font-size: 10px;
}

.keys {
  display: flex;
  align-items: center;
  gap: 3px;
}

kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 5px;
  border: 1px solid rgba(139, 179, 184, 0.22);
  border-bottom-color: rgba(139, 179, 184, 0.38);
  border-radius: 2px;
  color: #b7c9cc;
  background: #121b1f;
  box-shadow: inset 0 -2px 0 rgba(0, 0, 0, 0.25);
  font: 600 8px/1 var(--font-mono);
}

kbd.wide {
  min-width: 38px;
  padding: 0 7px;
  letter-spacing: 0.04em;
}

.powerup-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.powerup-list li {
  display: flex;
  align-items: center;
  gap: 11px;
}

.powerup-list li > span {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.powerup-list strong {
  color: #cbdadc;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.powerup-list small {
  color: var(--faint);
  font-size: 9px;
}

.power-swatch {
  position: relative;
  display: block;
  width: 26px;
  height: 26px;
  flex: 0 0 auto;
  border: 1px solid currentColor;
  background: #0a1012;
  box-shadow: inset 0 0 12px rgba(255, 255, 255, 0.03);
}

.power-swatch::before,
.power-swatch::after {
  content: "";
  position: absolute;
  background: currentColor;
}

.power-shield {
  color: var(--cyan);
}

.power-shield::before {
  left: 8px;
  top: 6px;
  width: 9px;
  height: 10px;
  clip-path: polygon(50% 0, 100% 17%, 88% 74%, 50% 100%, 12% 74%, 0 17%);
}

.power-shield::after {
  left: 11px;
  top: 9px;
  width: 3px;
  height: 6px;
  background: #081014;
}

.power-rapid {
  color: var(--amber);
}

.power-rapid::before {
  left: 11px;
  top: 5px;
  width: 7px;
  height: 16px;
  clip-path: polygon(52% 0, 100% 0, 66% 40%, 94% 40%, 30% 100%, 43% 56%, 8% 56%);
}

.power-life {
  color: var(--green);
}

.power-life::before {
  left: 11px;
  top: 6px;
  width: 4px;
  height: 14px;
}

.power-life::after {
  left: 6px;
  top: 11px;
  width: 14px;
  height: 4px;
}

.power-freeze {
  color: #a7c8ff;
}

.power-freeze::before {
  left: 12px;
  top: 5px;
  width: 2px;
  height: 16px;
}

.power-freeze::after {
  left: 5px;
  top: 7px;
  width: 16px;
  height: 12px;
  background: transparent;
  border-top: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: skewY(30deg);
  opacity: 0.85;
}

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

.record-row strong {
  color: var(--amber);
  font: 700 27px/1 var(--font-mono);
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
}

.record-row span {
  color: var(--faint);
  font-size: 9px;
}

.record-rule {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 13px 0 10px;
}

.record-rule span {
  height: 1px;
  flex: 1;
  background: rgba(255, 255, 255, 0.06);
}

.record-rule i {
  color: #43575b;
  font: 500 7px/1 var(--font-mono);
  letter-spacing: 0.12em;
  font-style: normal;
}

.record-note {
  color: var(--faint);
  font-size: 9px;
  line-height: 1.7;
}

/* ---------- Footer ---------- */

.footer {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 22px;
  color: #405256;
  font: 500 8px/1 var(--font-mono);
  letter-spacing: 0.13em;
}

.footer-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: #405256;
}

.footer-spacer {
  flex: 1;
}

.footer-link {
  color: #617b7f;
  text-decoration: none;
  border-bottom: 1px solid rgba(97, 123, 127, 0.32);
  transition: color 160ms ease, border-color 160ms ease;
}

.footer-link:hover {
  color: var(--cyan);
  border-color: rgba(94, 231, 242, 0.48);
}

.footer-status {
  display: flex;
  align-items: center;
  gap: 6px;
  color: #557074;
}

.footer-status i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px rgba(142, 240, 163, 0.55);
  animation: status-pulse 2.4s ease-in-out infinite;
}

@keyframes status-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

/* ---------- Touch controls ---------- */

.mobile-controls {
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 8px 4px;
  user-select: none;
}

.dpad {
  display: grid;
  grid-template-columns: repeat(3, 48px);
  grid-template-rows: repeat(3, 48px);
  gap: 3px;
}

.dpad-btn {
  appearance: none;
  border: 1px solid rgba(150, 193, 199, 0.24);
  border-radius: 4px;
  color: #b9d2d5;
  background: linear-gradient(180deg, #172329, #0d1518);
  font-size: 13px;
  touch-action: none;
}

.dpad-btn:active,
.dpad-btn.is-pressed {
  color: #071012;
  background: var(--cyan);
  border-color: var(--cyan);
}

.dpad-up { grid-column: 2; grid-row: 1; }
.dpad-left { grid-column: 1; grid-row: 2; }
.dpad-core { grid-column: 2; grid-row: 2; border: 1px solid rgba(255, 255, 255, 0.06); background: rgba(255, 255, 255, 0.02); }
.dpad-right { grid-column: 3; grid-row: 2; }
.dpad-down { grid-column: 2; grid-row: 3; }

.fire-btn {
  appearance: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: 86px;
  height: 86px;
  border: 1px solid rgba(255, 180, 92, 0.48);
  border-radius: 50%;
  color: #201307;
  background: radial-gradient(circle at 36% 28%, #ffd394, #ffa246 58%, #e87924);
  box-shadow: 0 0 0 6px rgba(255, 180, 92, 0.06), 0 12px 26px rgba(0, 0, 0, 0.4);
  touch-action: none;
  transition: transform 90ms ease, filter 90ms ease;
}

.fire-btn span {
  font: 800 12px/1 var(--font-mono);
  letter-spacing: 0.1em;
}

.fire-btn small {
  font: 600 8px/1 var(--font-body);
  opacity: 0.58;
}

.fire-btn:active,
.fire-btn.is-pressed {
  transform: scale(0.94);
  filter: brightness(1.1);
}

/* ---------- Responsive ---------- */

@media (max-width: 980px) {
  .app {
    width: min(760px, calc(100% - 32px));
    padding-top: 20px;
  }

  .layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .mission-card {
    grid-column: span 2;
  }

  .record-card {
    grid-column: span 2;
  }

  .side-card:last-child {
    grid-column: auto;
  }
}

@media (max-width: 620px) {
  .app {
    width: calc(100% - 20px);
    padding: 14px 0 18px;
  }

  .topbar {
    margin-bottom: 14px;
    gap: 10px;
  }

  .brand-mark {
    width: 40px;
    height: 40px;
  }

  .brand-mark svg {
    width: 28px;
    height: 28px;
  }

  .brand-kicker {
    font-size: 6px;
    letter-spacing: 0.14em;
  }

  .brand-title {
    font-size: 20px;
  }

  .text-button span:last-child {
    display: none;
  }

  .text-button {
    width: 40px;
    padding: 0;
    justify-content: center;
  }

  .top-actions {
    gap: 6px;
  }

  .game-panel {
    padding: 8px;
    border-radius: 8px;
  }

  .hud-cell {
    padding: 9px 9px 8px;
  }

  .hud-label {
    font-size: 6px;
    letter-spacing: 0.1em;
  }

  .hud-value {
    font-size: 13px;
    gap: 4px;
  }

  .mini-tank {
    width: 13px;
    height: 8px;
  }

  .mini-tank::before {
    left: 4px;
    top: -3px;
    width: 7px;
    height: 4px;
  }

  .mini-tank::after {
    left: 7px;
    top: -5px;
    height: 4px;
  }

  .hud-scan {
    display: none;
  }

  .hud-progress {
    margin-bottom: 8px;
  }

  .overlay {
    padding: 12px;
  }

  .overlay-card {
    padding: 23px 19px 18px;
  }

  .overlay-desc {
    margin: 10px 0 14px;
    font-size: 11px;
  }

  .overlay-stats {
    margin-bottom: 15px;
  }

  .overlay-stat {
    padding: 9px 5px;
  }

  .overlay-stat strong {
    font-size: 13px;
  }

  .overlay-hint {
    margin-top: 10px;
    font-size: 8px;
  }

  .sidebar {
    grid-template-columns: 1fr;
  }

  .mission-card,
  .record-card {
    grid-column: auto;
  }

  .side-card {
    padding: 15px 16px;
  }

  .footer {
    flex-wrap: wrap;
    line-height: 1.5;
    margin-top: 16px;
  }

  .footer-spacer {
    display: none;
  }

  .footer-status {
    margin-left: auto;
  }
}

@media (pointer: coarse), (hover: none) {
  .mobile-controls {
    display: flex;
  }

  #game {
    cursor: default;
  }

  .overlay-hint {
    display: none;
  }
}

@media (max-height: 720px) and (pointer: fine) {
  .app {
    padding-top: 16px;
  }

  .topbar {
    margin-bottom: 14px;
  }

  .sidebar {
    gap: 9px;
  }

  .side-card {
    padding: 13px 16px 14px;
  }

  .side-label {
    margin-bottom: 9px;
  }

  .powerup-list {
    gap: 7px;
  }

  .record-note {
    display: none;
  }
}

@media (min-width: 981px) and (max-height: 940px) {
  .app {
    width: min(1010px, calc(100% - 40px));
    padding-top: 16px;
    padding-bottom: 16px;
  }

  .topbar {
    margin-bottom: 14px;
  }

  .layout {
    grid-template-columns: minmax(0, 1fr) 292px;
    gap: 18px;
  }

  .game-panel {
    padding: 11px;
  }

  .hud-cell {
    padding: 9px 13px 8px;
  }

  .hud-progress {
    margin-bottom: 9px;
  }

  .sidebar {
    gap: 9px;
  }

  .side-card {
    padding: 13px 15px 14px;
  }

  .side-label {
    margin-bottom: 9px;
  }

  .powerup-list {
    gap: 7px;
  }

  .record-note {
    display: none;
  }

  .footer {
    margin-top: 14px;
  }
}

@media (min-width: 981px) and (max-height: 820px) {
  .app {
    width: min(910px, calc(100% - 32px));
    padding-top: 12px;
    padding-bottom: 10px;
  }

  .brand-mark {
    width: 42px;
    height: 42px;
  }

  .brand-mark svg {
    width: 29px;
    height: 29px;
  }

  .layout {
    grid-template-columns: minmax(0, 1fr) 272px;
    gap: 14px;
  }

  .hud-label {
    font-size: 7px;
  }

  .hud-value {
    font-size: 15px;
  }

  .side-card {
    padding: 11px 14px 12px;
  }

  .mission-card p {
    font-size: 10px;
    line-height: 1.6;
  }

  .mission-meter {
    margin-top: 11px;
  }

  .powerup-list li:nth-child(4) {
    display: none;
  }

  .footer {
    font-size: 7px;
    margin-top: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}