:root {
  color-scheme: dark;
  --bg: #0f172a;
  --surface: #1e293b;
  --surface-hover: #273449;
  --inset: rgba(15, 23, 42, 0.55);
  --line: rgba(148, 163, 184, 0.16);
  --line-strong: rgba(148, 163, 184, 0.32);
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #f472b6;
  --accent-hover: #f9a8d4;
  --accent-soft: rgba(244, 114, 182, 0.16);
  --accent-ink: #1f0a16;
  --exit: #34d399;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(2, 6, 23, 0.45), 0 10px 28px -12px rgba(2, 6, 23, 0.75);
  --speed: 180ms;
  --gutter: 16px;
  --content: 640px;
  --pad-key: 42px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --speed: 0ms;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  background-color: var(--bg);
  background-image:
    radial-gradient(48rem 32rem at 0% -10%, rgba(244, 114, 182, 0.09), transparent 70%),
    radial-gradient(40rem 30rem at 100% 110%, rgba(52, 211, 153, 0.06), transparent 70%);
  color: var(--text);
  font: 15px/1.45 var(--font);
}

.app {
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.topbar,
.layout,
.footer {
  width: 100%;
  max-width: var(--content);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Header */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-block: 8px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.brand-mark {
  flex: none;
  width: 30px;
  height: 30px;
  filter: drop-shadow(0 0 10px rgba(244, 114, 182, 0.35));
}

.brand-name {
  margin: 0;
  font-size: 20px;
  font-weight: 750;
  letter-spacing: -0.01em;
}

.brand-tagline {
  overflow: hidden;
  color: var(--muted);
  font-size: 14px;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.topbar-actions {
  display: flex;
  flex: none;
  gap: 8px;
}

/* Buttons and fields */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 40px;
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
  transition:
    background-color var(--speed) ease,
    border-color var(--speed) ease,
    color var(--speed) ease,
    box-shadow var(--speed) ease,
    transform var(--speed) ease;
  -webkit-tap-highlight-color: transparent;
}

.btn:hover {
  border-color: var(--line-strong);
  background: var(--surface-hover);
}

.btn:active {
  transform: translateY(1px) scale(0.98);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  border-color: transparent;
  background: var(--accent);
  box-shadow: 0 8px 24px -10px rgba(244, 114, 182, 0.8);
  color: var(--accent-ink);
}

.btn-primary:hover {
  border-color: transparent;
  background: var(--accent-hover);
}

.btn-lang {
  width: 44px;
  padding: 0;
  font-size: 13px;
  letter-spacing: 0.06em;
}

.btn-solution.is-active {
  border-color: rgba(52, 211, 153, 0.55);
  background: rgba(52, 211, 153, 0.12);
  color: #a7f3d0;
}

.icon {
  flex: none;
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.icon-small {
  width: 16px;
  height: 16px;
  color: var(--muted);
}

.field {
  display: block;
  min-width: 0;
}

.field-label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.select {
  position: relative;
  display: block;
}

.select::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 15px;
  width: 7px;
  height: 7px;
  margin-top: -6px;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(45deg);
  pointer-events: none;
}

.select select {
  width: 100%;
  min-height: 40px;
  padding: 0 38px 0 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  color: var(--text);
  font: inherit;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  transition: border-color var(--speed) ease, background-color var(--speed) ease;
}

.select select:hover {
  border-color: var(--line-strong);
  background-color: var(--surface-hover);
}

select option {
  background: var(--surface);
  color: var(--text);
}

/* Layout: phones first */

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-rows: auto minmax(240px, 1fr) auto;
  grid-template-areas:
    "hud hud"
    "stage stage"
    "actions controls";
  gap: 10px 12px;
  min-height: 0;
  padding-block: 4px 8px;
}

.hud {
  grid-area: hud;
}

.stage {
  grid-area: stage;
}

.actions {
  grid-area: actions;
}

.controls {
  grid-area: controls;
}

/* Stats */

.hud {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.stat {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1px;
  min-width: 0;
  min-height: 54px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.stat-label {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  overflow: hidden;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

.stat-value {
  display: flex;
  align-items: center;
  gap: 4px;
  min-width: 0;
  font-size: 17px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.stat-level {
  cursor: pointer;
  transition: border-color var(--speed) ease, background-color var(--speed) ease;
}

.stat-level:hover {
  border-color: var(--line-strong);
  background: var(--surface-hover);
}

.stat-level:focus-within {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.stat-select {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  border: 0;
  opacity: 0;
  font-size: 16px;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}

.badge {
  position: absolute;
  top: -9px;
  right: 8px;
  padding: 1px 7px;
  border: 1px solid rgba(244, 114, 182, 0.45);
  border-radius: 999px;
  background: #3a1830;
  color: var(--accent);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* Board */

.stage {
  position: relative;
  min-width: 0;
  min-height: 0;
}

.board-wrap {
  position: absolute;
  inset: 0;
  width: 0;
  height: 0;
  margin: auto;
}

.board {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 14px;
  background: #0b1222;
  box-shadow:
    0 0 0 1px var(--line),
    0 30px 80px -34px rgba(244, 114, 182, 0.4),
    var(--shadow);
  cursor: grab;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
}

/* Sits on the board's bottom edge: the 16px pill reaches 9px into the canvas,
   whose margin under the outer wall is at least 10px, so it never hides a wall
   or passage, and 7px below it, inside the 10px row gap on phones. */
.start-hint {
  position: absolute;
  bottom: -7px;
  left: 50%;
  max-width: calc(100% - 24px);
  margin: 0;
  padding: 0 10px;
  overflow: hidden;
  border: 1px solid rgba(244, 114, 182, 0.35);
  border-radius: 999px;
  background: var(--bg);
  box-shadow: var(--shadow);
  color: var(--text);
  font-size: 12px;
  font-weight: 600;
  line-height: 14px;
  white-space: nowrap;
  text-overflow: ellipsis;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 6px);
  transition: opacity var(--speed) ease, transform var(--speed) ease;
}

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

.win {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 16px;
  border-radius: 14px;
  background: radial-gradient(circle at 50% 50%, rgba(2, 6, 23, 0.6), rgba(2, 6, 23, 0.25));
}

.win-card {
  width: min(320px, 100%);
  padding: 20px 18px 18px;
  border: 1px solid rgba(52, 211, 153, 0.35);
  border-radius: 16px;
  background: rgba(15, 23, 42, 0.94);
  box-shadow: 0 24px 60px -20px rgba(52, 211, 153, 0.4), var(--shadow);
  text-align: center;
  animation: rise var(--speed) ease-out;
}

.win-title {
  margin: 0 0 6px;
  font-size: 22px;
  letter-spacing: -0.01em;
}

.win-stats {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.win-note {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.win-note.is-best {
  color: var(--exit);
  font-weight: 700;
}

.win-note:empty {
  display: none;
}

.win-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 16px;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.98);
  }
}

/* Actions */

.actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.actions .btn {
  width: 100%;
}

.about {
  display: none;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

/* Direction pad */

.controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.pad {
  display: grid;
  grid-template-columns: repeat(3, var(--pad-key));
  grid-template-rows: repeat(3, var(--pad-key));
  gap: 4px;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
}

.pad-btn {
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  color: var(--text);
  cursor: pointer;
  touch-action: manipulation;
  transition:
    background-color var(--speed) ease,
    color var(--speed) ease,
    box-shadow var(--speed) ease,
    transform var(--speed) ease;
  -webkit-tap-highlight-color: transparent;
}

.pad-btn:hover {
  background: var(--surface-hover);
}

.pad-btn.is-pressed {
  border-color: transparent;
  background: var(--accent);
  box-shadow: 0 0 22px rgba(244, 114, 182, 0.55);
  color: var(--accent-ink);
  transform: scale(0.95);
}

.pad-btn .icon {
  width: 22px;
  height: 22px;
  stroke-width: 2.4;
}

.pad-btn[data-dir="up"] {
  grid-area: 1 / 2;
}

.pad-btn[data-dir="left"] {
  grid-area: 2 / 1;
}

.pad-btn[data-dir="right"] {
  grid-area: 2 / 3;
}

.pad-btn[data-dir="down"] {
  grid-area: 3 / 2;
}

.pad-center {
  grid-area: 2 / 2;
  align-self: center;
  justify-self: center;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(244, 114, 182, 0.3);
  box-shadow: 0 0 14px rgba(244, 114, 182, 0.45);
}

.help {
  display: none;
}

/* Footer */

.footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding-bottom: 4px;
  color: var(--muted);
  font-size: 13px;
}

.footer a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  color: var(--text);
  text-decoration: underline;
  text-decoration-color: rgba(244, 114, 182, 0.55);
  text-underline-offset: 3px;
  transition: color var(--speed) ease;
}

.footer a:hover {
  color: var(--accent);
}

/* Small phones */

@media (max-width: 560px) {
  .brand-tagline {
    display: none;
  }
}

@media (max-width: 359px) {
  :root {
    --gutter: 12px;
    --pad-key: 40px;
  }

  .stat {
    padding-inline: 9px;
  }

  #restart span {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
  }

  #restart {
    padding: 0;
    width: 44px;
  }
}

/* Desktop: board on the left, panel on the right */

@media (min-width: 880px) {
  :root {
    --gutter: 24px;
    --board: calc(100vh - 136px);
    --content: calc(var(--board) + 324px + 2 * var(--gutter));
    --pad-key: 44px;
  }

  @supports (height: 100dvh) {
    :root {
      --board: calc(100dvh - 136px);
    }
  }

  .topbar {
    padding-block: 12px;
  }

  .brand-name {
    font-size: 22px;
  }

  .layout {
    grid-template-columns: minmax(0, var(--board)) 300px;
    grid-template-rows: auto auto auto 1fr;
    grid-template-areas:
      "stage hud"
      "stage actions"
      "stage controls"
      "stage .";
    justify-content: center;
    gap: 12px 24px;
    padding-block: 4px 16px;
  }

  .hud,
  .actions,
  .controls {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
  }

  .hud {
    grid-template-columns: 1fr;
    gap: 0;
    padding: 0 16px;
  }

  .stat {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    min-height: 42px;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: none;
    box-shadow: none;
  }

  .stat + .stat {
    border-top: 1px solid var(--line);
  }

  .stat-label {
    font-size: 12px;
  }

  .stat-level:hover {
    background: none;
  }

  .stat-level:hover .stat-value {
    color: var(--accent);
  }

  .stat-level:focus-within {
    outline-offset: 0;
  }

  .badge {
    position: static;
  }

  .actions {
    gap: 8px;
    padding: 14px;
  }

  .actions .btn,
  .select select {
    background-color: var(--inset);
    box-shadow: none;
  }

  .actions .btn:hover,
  .select select:hover {
    background-color: var(--surface-hover);
  }

  .actions .btn-solution.is-active {
    background-color: rgba(52, 211, 153, 0.12);
  }

  .field-label {
    position: static;
    display: block;
    width: auto;
    height: auto;
    margin: 2px 0 4px;
    overflow: visible;
    clip-path: none;
    color: var(--muted);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }

  .about {
    display: block;
  }

  .controls {
    gap: 12px;
    padding: 14px;
  }

  .pad {
    gap: 5px;
  }

  .pad-btn {
    background: var(--inset);
    box-shadow: none;
  }

  .help {
    display: grid;
    gap: 6px;
    width: 100%;
    margin: 0;
    padding-top: 12px;
    border-top: 1px solid var(--line);
    font-size: 13px;
  }

  .help div {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
  }

  .help dt,
  .help dd {
    margin: 0;
  }

  .help dd {
    color: var(--muted);
    text-align: right;
  }

  kbd {
    display: inline-block;
    padding: 2px 7px;
    border: 1px solid var(--line-strong);
    border-bottom-width: 2px;
    border-radius: 6px;
    background: var(--bg);
    color: var(--text);
    font: 600 12px/1.4 var(--font);
    white-space: nowrap;
  }

  .footer {
    padding-bottom: 6px;
  }

  .board-wrap {
    margin: 0 auto;
  }
}

/* Short desktop windows: keep the side panel no taller than the board */

@media (min-width: 880px) and (max-height: 780px) {
  .help {
    display: none;
  }
}

@media (min-width: 880px) and (max-height: 680px) {
  .about {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .win-card {
    animation: none;
  }
}