:root {
  color-scheme: dark;
  --black: #050506;
  --panel: #090a0c;
  --grid: #2a2c31;
  --grid-bright: #3a3d43;
  --text: #d6d7da;
  --muted: #777b83;
  --red: #ff3131;
  --green: #6dff65;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  display: grid;
  min-height: 100vh;
  margin: 0;
  place-items: center;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 50% 45%, #111318 0, var(--black) 58%),
    var(--black);
  color: var(--text);
  font-family: "Courier New", Courier, monospace;
}

body::before {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 100% 4px;
  content: "";
  mix-blend-mode: screen;
}

.game-shell {
  width: min(94vw, 1040px);
  padding: 16px 0;
}

.game-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--grid-bright);
  padding: 0 2px 10px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

h1 {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  font-size: clamp(40px, 7vw, 64px);
  font-weight: 900;
  letter-spacing: -0.08em;
  line-height: 0.75;
}

.status-panel {
  display: flex;
  gap: 24px;
  padding-bottom: 1px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.header-tools {
  display: flex;
  align-items: end;
  gap: 24px;
}

.status-panel > span {
  display: grid;
  gap: 4px;
}

.metric-label {
  color: var(--muted);
  font-style: normal;
}

.status-panel strong {
  color: var(--text);
  font-size: 20px;
  letter-spacing: 0.04em;
}

.game-frame {
  position: relative;
  padding: 8px;
  border: 1px solid var(--grid-bright);
  background: #020203;
  box-shadow:
    0 0 0 1px #000,
    0 0 50px rgba(0, 0, 0, 0.75),
    inset 0 0 30px rgba(255, 255, 255, 0.018);
}

.access-frame {
  display: grid;
  height: 318px;
  place-items: center;
  background:
    linear-gradient(rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    #050607;
  background-size: 100% 24px;
}

.access-terminal {
  width: min(76%, 620px);
  text-align: center;
}

.access-terminal > p {
  margin: 0 0 9px;
  color: var(--muted);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.access-terminal > strong {
  display: block;
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 900;
  letter-spacing: -0.05em;
}

.access-terminal > span {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.code-form {
  display: grid;
  max-width: 390px;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 24px auto 14px;
}

.code-form input {
  width: 100%;
  min-width: 0;
  aspect-ratio: 1.25;
  border: 1px solid var(--grid-bright);
  border-radius: 0;
  outline: none;
  background: #0a0b0e;
  color: var(--green);
  font: 900 clamp(24px, 4vw, 42px) "Courier New", monospace;
  text-align: center;
  caret-color: var(--green);
}

.code-form input:focus {
  border-color: var(--green);
  box-shadow:
    inset 0 0 12px rgba(109, 255, 101, 0.1),
    0 0 10px rgba(109, 255, 101, 0.12);
}

.access-status {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  color: var(--muted);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.access-status i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
}

.access-terminal.error > strong,
.access-terminal.error > span,
.access-terminal.error .access-status {
  color: var(--red);
}

.access-terminal.error .access-status i {
  background: var(--red);
  box-shadow: 0 0 8px var(--red);
}

#retry-code {
  width: min(100%, 390px);
  margin-top: 22px;
  border: 1px solid var(--red);
  background: transparent;
  color: var(--red);
  padding: 10px;
  font: inherit;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.1em;
  cursor: pointer;
}

#retry-code:hover,
#retry-code:focus-visible {
  outline: none;
  background: var(--red);
  color: var(--black);
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  background: #050506;
}

[hidden] {
  display: none !important;
}

.chess-frame {
  position: relative;
  display: grid;
  height: 318px;
  grid-template-columns: 300px 1fr;
  gap: 8px;
}

.engine-loader {
  position: absolute;
  inset: 8px;
  z-index: 20;
  display: grid;
  place-items: center;
  background:
    linear-gradient(rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    rgba(4, 5, 7, 0.985);
  background-size: 100% 22px;
}

.engine-loader.ready {
  visibility: hidden;
  opacity: 0;
  transition:
    opacity 240ms ease,
    visibility 240ms ease;
}

.engine-loader-inner {
  width: min(78%, 560px);
}

.engine-loader-inner > p {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.engine-loader-inner > strong {
  display: block;
  margin-bottom: 20px;
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  font-size: clamp(24px, 4vw, 42px);
  font-weight: 900;
  letter-spacing: -0.045em;
}

.engine-progress {
  height: 12px;
  overflow: hidden;
  border: 1px solid var(--grid-bright);
  background: #090a0c;
}

.engine-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--green);
  box-shadow: 0 0 14px rgba(109, 255, 101, 0.5);
  transition: width 160ms linear;
}

.engine-loader-meta {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  color: var(--muted);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.engine-loader-meta b {
  color: var(--green);
}

#retry-engine,
#open-localhost {
  display: block;
  width: 100%;
  margin-top: 18px;
  border: 1px solid var(--red);
  background: transparent;
  color: var(--red);
  padding: 9px;
  font: inherit;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-align: center;
  cursor: pointer;
}

#retry-engine:hover,
#retry-engine:focus-visible,
#open-localhost:hover,
#open-localhost:focus-visible {
  outline: none;
  background: var(--red);
  color: var(--black);
}

.chess-board {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  grid-template-rows: repeat(8, 1fr);
  overflow: hidden;
  border: 1px solid #5b6069;
  background: #0c0e12;
  box-shadow:
    0 0 0 1px #000,
    0 0 22px rgba(255, 255, 255, 0.035);
}

.chess-square {
  position: relative;
  display: grid;
  min-width: 0;
  place-items: center;
  border: 1px solid #343840;
  background: #282c33;
  color: #e5e6e8;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 27px;
  line-height: 1;
  cursor: pointer;
}

.chess-square.dark {
  background: #0d0f13;
}

.chess-square::after {
  position: absolute;
  inset: 3px;
  border: 1px solid transparent;
  pointer-events: none;
  content: "";
}

.chess-square.selected::after {
  border-color: var(--red);
  box-shadow: inset 0 0 10px rgba(255, 49, 49, 0.28);
}

.chess-square.legal::before {
  position: absolute;
  z-index: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
  content: "";
}

.chess-square.capture::before {
  width: calc(100% - 8px);
  height: calc(100% - 8px);
  border: 1px solid var(--green);
  border-radius: 0;
  background: transparent;
}

.chess-piece {
  position: relative;
  z-index: 1;
  transform: translateY(-1px);
}

.chess-piece.black {
  color: #818791;
  text-shadow: 0 0 8px rgba(129, 135, 145, 0.28);
}

.chess-piece.white {
  color: #f4f4f2;
  text-shadow: 0 0 8px rgba(244, 244, 242, 0.2);
}

.square-label {
  position: absolute;
  right: 3px;
  bottom: 2px;
  color: #646871;
  font: 6px "Courier New", monospace;
}

.chess-console {
  display: grid;
  min-width: 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  grid-template-rows: auto auto 1fr auto;
  gap: 8px;
  background:
    linear-gradient(rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    #07080a;
  background-size: 100% 28px;
  padding: 14px;
}

.chess-console-head {
  display: flex;
  grid-column: 1 / -1;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--grid-bright);
  padding-bottom: 10px;
}

.chess-console-head p {
  margin: 0;
  color: var(--muted);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.chess-console-head i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #52555c;
}

.chess-console-head i.online {
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
}

.chess-readout {
  display: grid;
  align-content: start;
  gap: 5px;
  border: 1px solid var(--grid);
  padding: 8px;
}

.chess-readout span,
.move-log > span {
  color: var(--muted);
  font-size: 7px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.chess-readout strong {
  overflow: hidden;
  color: var(--text);
  font-size: 10px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.move-log {
  min-height: 0;
  grid-column: 1 / -1;
  overflow: hidden;
  border-top: 1px solid var(--grid);
  padding-top: 8px;
}

.move-log ol {
  display: grid;
  max-height: 95px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 5px 12px;
  overflow-y: auto;
  margin: 7px 0 0;
  padding: 0;
  color: #9fa3aa;
  font-size: 8px;
  list-style-position: inside;
}

.new-game {
  grid-column: 1 / -1;
  border: 1px solid var(--grid-bright);
  background: transparent;
  color: var(--text);
  padding: 8px;
  font: inherit;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.08em;
  cursor: pointer;
}

.new-game:hover,
.new-game:focus-visible {
  border-color: var(--green);
  outline: none;
  background: var(--green);
  color: var(--black);
}

.corner {
  position: absolute;
  z-index: 2;
  width: 18px;
  height: 18px;
  pointer-events: none;
}

.corner-tl {
  top: -4px;
  left: -4px;
  border-top: 2px solid var(--text);
  border-left: 2px solid var(--text);
}

.corner-tr {
  top: -4px;
  right: -4px;
  border-top: 2px solid var(--text);
  border-right: 2px solid var(--text);
}

.corner-bl {
  bottom: -4px;
  left: -4px;
  border-bottom: 2px solid var(--text);
  border-left: 2px solid var(--text);
}

.corner-br {
  right: -4px;
  bottom: -4px;
  border-right: 2px solid var(--text);
  border-bottom: 2px solid var(--text);
}

.game-message {
  position: absolute;
  inset: 8px;
  display: grid;
  place-content: center;
  background: rgba(3, 3, 4, 0.74);
  text-align: center;
  transition: opacity 120ms ease;
}

.game-message.hidden {
  visibility: hidden;
  opacity: 0;
}

.game-message strong {
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  font-size: clamp(38px, 7vw, 68px);
  font-weight: 900;
  letter-spacing: -0.05em;
}

.game-message span {
  margin-top: 8px;
  color: var(--green);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.game-footer {
  display: flex;
  align-items: center;
  gap: 22px;
  border-bottom: 1px solid var(--grid-bright);
  padding: 10px 2px;
  color: var(--muted);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.game-footer p {
  display: flex;
  align-items: center;
  gap: 5px;
  margin: 0;
}

.key {
  display: inline-grid;
  width: 19px;
  height: 19px;
  place-items: center;
  border: 1px solid var(--grid-bright);
  color: var(--text);
  line-height: 1;
}

.key.wide {
  width: auto;
  padding: 0 6px;
}

.player-dot {
  width: 8px;
  height: 8px;
  box-shadow: 0 0 7px currentColor;
}

.player-dot.red {
  background: var(--red);
  color: var(--red);
}

.player-dot.blue {
  background: #298cff;
  color: #298cff;
}

.mode-toggle {
  border: 1px solid var(--grid-bright);
  background: transparent;
  color: var(--text);
  padding: 6px 8px;
  font: inherit;
  font-weight: 700;
  letter-spacing: 0.08em;
  cursor: pointer;
}

.life-control {
  border: 1px solid var(--grid-bright);
  background: transparent;
  color: var(--text);
  padding: 6px 8px;
  font: inherit;
  font-weight: 700;
  letter-spacing: 0.08em;
  cursor: pointer;
}

.life-control:hover,
.life-control:focus-visible,
.life-control.active {
  border-color: var(--green);
  outline: none;
  background: var(--green);
  color: var(--black);
}

#life-signal i {
  background: #52555c;
  box-shadow: none;
}

#life-signal.running i {
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
}

.exit-game {
  border: 1px solid var(--grid-bright);
  background: transparent;
  color: var(--muted);
  padding: 6px 8px;
  font: inherit;
  font-weight: 700;
  letter-spacing: 0.08em;
  cursor: pointer;
}

.exit-game:hover,
.exit-game:focus-visible {
  border-color: var(--text);
  outline: none;
  color: var(--text);
}

.mode-toggle:hover,
.mode-toggle:focus-visible,
.mode-toggle.active {
  border-color: #298cff;
  outline: none;
  background: #298cff;
  color: #050506;
}

.signal {
  margin-left: auto !important;
  color: var(--text);
}

.signal i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
}

.worker-signal i {
  background: #52555c;
  box-shadow: none;
}

.worker-signal.online i {
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
}

.worker-signal.error i {
  background: var(--red);
  box-shadow: 0 0 8px var(--red);
}

@media (max-width: 620px) {
  .game-shell {
    width: min(94vw, 520px);
    padding: 20px 0;
  }

  .game-header {
    align-items: start;
    flex-direction: column;
  }

  .header-tools {
    width: 100%;
    align-items: center;
    justify-content: space-between;
  }

  .status-panel {
    gap: 12px;
  }

  .game-footer {
    flex-wrap: wrap;
    gap: 10px 16px;
  }

  .chess-frame {
    height: auto;
    grid-template-columns: 1fr;
  }

  .chess-board {
    aspect-ratio: 1;
  }

  .chess-console {
    min-height: 260px;
  }

  .signal {
    width: 100%;
    margin-left: 0 !important;
  }
}