:root {
  --ink: #f8fbff;
  --muted: #9fb2c8;
  --panel: rgba(9, 14, 28, 0.82);
  --panel-strong: rgba(12, 19, 38, 0.94);
  --line: rgba(95, 230, 255, 0.28);
  --cyan: #5fe6ff;
  --magenta: #ff4fd8;
  --lime: #95ff66;
  --gold: #ffd166;
  --violet: #b985ff;
  --danger: #ff5d4d;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.5);
}

* {
  box-sizing: border-box;
}

html {
  background: #070814;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  font-family:
    "Segoe UI",
    "Microsoft YaHei",
    system-ui,
    sans-serif;
  background:
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.035) 0 1px, transparent 1px 6px),
    linear-gradient(135deg, rgba(95, 230, 255, 0.16), transparent 28%),
    linear-gradient(225deg, rgba(255, 79, 216, 0.14), transparent 30%),
    radial-gradient(circle at 78% 20%, rgba(149, 255, 102, 0.1), transparent 28%),
    linear-gradient(180deg, #070814 0%, #11182c 48%, #090711 100%);
  overflow-x: hidden;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  content: "";
  background:
    linear-gradient(90deg, rgba(95, 230, 255, 0.07) 1px, transparent 1px),
    linear-gradient(rgba(255, 79, 216, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, transparent, #000 18%, #000 82%, transparent);
}

button {
  border: 0;
  color: inherit;
  font: inherit;
  cursor: pointer;
  touch-action: manipulation;
  user-select: none;
}

.game-shell {
  width: min(94vw, 1180px);
  min-height: 100vh;
  margin: 0 auto;
  padding: 22px 0;
  display: grid;
  gap: 14px;
  align-content: center;
}

.hud {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.hud > div,
.control-bar,
.stage,
.dpad .direction,
.run-card,
.menu-section {
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.04) inset,
    0 12px 36px rgba(0, 0, 0, 0.28),
    0 0 22px rgba(95, 230, 255, 0.1);
  backdrop-filter: blur(14px);
}

.hud > div {
  min-height: 72px;
  padding: 10px 12px;
  border-radius: 8px;
  position: relative;
  overflow: hidden;
}

.hud > div::after {
  position: absolute;
  inset: auto 10px 8px 10px;
  height: 2px;
  content: "";
  background: linear-gradient(90deg, var(--cyan), var(--magenta), var(--gold));
  opacity: 0.76;
}

.label {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
}

.hud strong {
  display: block;
  color: var(--ink);
  font-size: clamp(1.35rem, 4vw, 2.05rem);
  line-height: 1;
  text-shadow: 0 0 16px rgba(95, 230, 255, 0.48);
}

.stage {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  overflow: hidden;
  border-radius: 8px;
  box-shadow: var(--shadow), 0 0 34px rgba(255, 79, 216, 0.18);
  touch-action: none;
}

.stage::before {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  content: "";
  background:
    linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035), transparent 22%, transparent 78%, rgba(255, 255, 255, 0.035));
  background-size: 100% 5px, auto;
  mix-blend-mode: screen;
  opacity: 0.16;
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
  background: #080b18;
}

.overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: none;
  overflow: auto;
  padding: clamp(14px, 3vw, 28px);
  text-align: center;
  background: rgba(5, 8, 18, 0.78);
  backdrop-filter: blur(8px);
}

.overlay.is-visible {
  display: grid;
  place-items: center;
}

.overlay-content {
  width: min(100%, 760px);
  display: grid;
  gap: 14px;
  justify-items: center;
}

.eyebrow {
  margin: 0;
  color: var(--cyan);
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.overlay h1 {
  margin: 0;
  color: #ffffff;
  font-size: clamp(3rem, 12vw, 6.4rem);
  line-height: 0.92;
  letter-spacing: 0;
  text-shadow:
    0 0 18px rgba(95, 230, 255, 0.75),
    0 0 34px rgba(255, 79, 216, 0.5);
}

.overlay p {
  margin: 0;
  color: var(--muted);
  font-size: clamp(0.95rem, 2.4vw, 1.15rem);
}

.menu-grid {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.menu-section {
  min-width: 0;
  padding: 12px;
  border-radius: 8px;
}

.menu-heading,
.run-card > div {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.menu-heading {
  margin-bottom: 9px;
  color: var(--ink);
  font-weight: 900;
}

.menu-heading small,
.run-card span {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 800;
}

.segmented {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 6px;
}

.segmented.compact {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.segmented button {
  min-height: 38px;
  padding: 0 8px;
  border-radius: 8px;
  color: var(--muted);
  background: rgba(7, 16, 31, 0.76);
  border: 1px solid rgba(95, 230, 255, 0.18);
  font-size: 0.82rem;
  font-weight: 900;
  transition:
    transform 130ms ease,
    border-color 130ms ease,
    background 130ms ease,
    color 130ms ease;
}

.segmented button.is-selected {
  color: #07101b;
  background: linear-gradient(135deg, var(--cyan), var(--lime));
  border-color: rgba(149, 255, 102, 0.8);
}

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

.food-list span {
  min-width: 0;
  color: var(--ink);
  font-size: 0.78rem;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.food-list i {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: var(--food);
  box-shadow: 0 0 12px var(--food);
}

.leaderboard {
  min-height: 94px;
  margin: 0;
  padding-left: 24px;
  text-align: left;
}

.leaderboard li {
  margin: 3px 0;
  color: var(--ink);
  font-size: 0.8rem;
  font-weight: 800;
}

.leaderboard .empty {
  list-style: none;
  margin-left: -24px;
  color: var(--muted);
}

.summary {
  width: 100%;
  display: none;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.summary.is-visible {
  display: grid;
}

.summary span {
  min-height: 54px;
  padding: 8px;
  border-radius: 8px;
  color: var(--muted);
  background: rgba(7, 16, 31, 0.74);
  border: 1px solid rgba(95, 230, 255, 0.18);
  font-size: 0.72rem;
  font-weight: 800;
}

.summary strong {
  display: block;
  margin-top: 3px;
  color: var(--ink);
  font-size: 1.18rem;
}

.primary-button,
.tool-button,
.sound-button {
  min-height: 44px;
  border-radius: 8px;
  font-weight: 900;
  transition:
    transform 130ms ease,
    box-shadow 130ms ease,
    filter 130ms ease;
}

.primary-button {
  min-width: 170px;
  padding: 0 28px;
  color: #07101b;
  background: linear-gradient(135deg, var(--cyan), var(--lime));
  box-shadow: 0 0 22px rgba(95, 230, 255, 0.36);
}

.side-panel {
  display: grid;
  gap: 14px;
  align-content: start;
}

.control-bar {
  min-height: 62px;
  padding: 9px;
  border-radius: 8px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.tool-button,
.sound-button {
  background: var(--panel-strong);
  color: var(--ink);
  border: 1px solid rgba(95, 230, 255, 0.2);
}

.boost-button.is-active {
  color: #07101b;
  background: linear-gradient(135deg, var(--gold), var(--magenta));
  border-color: rgba(255, 209, 102, 0.7);
}

.sound-button {
  color: var(--cyan);
}

.sound-button.is-muted {
  color: #ffffff;
  background: linear-gradient(135deg, #65151c, var(--danger));
  border-color: rgba(255, 93, 77, 0.6);
}

.run-card {
  min-height: 172px;
  padding: 12px;
  border-radius: 8px;
  display: grid;
  gap: 10px;
}

.run-card strong {
  color: var(--ink);
  font-size: 0.95rem;
}

.meter {
  width: 100%;
  height: 9px;
  overflow: hidden;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(95, 230, 255, 0.18);
}

.meter i {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--cyan), var(--lime), var(--gold));
  box-shadow: 0 0 12px rgba(95, 230, 255, 0.6);
}

.primary-button:hover,
.tool-button:hover,
.sound-button:hover,
.direction:hover,
.segmented button:hover {
  transform: translateY(-1px);
  filter: brightness(1.08);
  box-shadow: 0 0 24px rgba(255, 79, 216, 0.22);
}

.primary-button:active,
.tool-button:active,
.sound-button:active,
.direction:active,
.segmented button:active {
  transform: translateY(1px) scale(0.98);
}

.dpad {
  width: min(250px, 76vw);
  aspect-ratio: 1;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  gap: 8px;
}

.direction {
  min-width: 0;
  min-height: 0;
  border-radius: 8px;
  background: linear-gradient(145deg, rgba(95, 230, 255, 0.18), rgba(255, 79, 216, 0.12));
  color: var(--cyan);
  font-size: clamp(1rem, 8vw, 1.65rem);
  font-weight: 900;
  text-shadow: 0 0 12px rgba(95, 230, 255, 0.7);
}

.up {
  grid-column: 2;
  grid-row: 1;
}

.left {
  grid-column: 1;
  grid-row: 2;
}

.right {
  grid-column: 3;
  grid-row: 2;
}

.down {
  grid-column: 2;
  grid-row: 3;
}

@media (min-width: 840px) {
  .game-shell {
    grid-template-columns: minmax(0, 1fr) 255px;
    grid-template-areas:
      "hud hud"
      "stage side";
  }

  .hud {
    grid-area: hud;
  }

  .stage {
    grid-area: stage;
  }

  .side-panel {
    grid-area: side;
  }
}

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

  .food-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .segmented {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 430px) {
  .game-shell {
    width: min(96vw, 780px);
    padding: 10px 0;
    gap: 10px;
  }

  .hud {
    gap: 6px;
  }

  .hud > div {
    min-height: 60px;
    padding: 8px;
  }

  .label {
    font-size: 0.72rem;
  }

  .overlay {
    padding: 12px;
  }

  .overlay h1 {
    font-size: clamp(2.6rem, 15vw, 4.4rem);
  }

  .menu-section {
    padding: 10px;
  }
}

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