:root {
  color-scheme: dark;
  --bg: #070b0c;
  --panel: rgba(6, 10, 12, 0.96);
  --board: #04100a;
  --green: #6eff43;
  --green-mid: #2fbd35;
  --green-dark: #0c3211;
  --red: #f22e28;
  --white: #f5fff7;
  --muted: #c4d2c8;
  --line: #48f25c;
  --button: #131a1c;
  --button-primary: #249632;
  --shadow: rgba(0, 0, 0, 0.42);
  --control-size: clamp(54px, 15vw, 64px);
  --control-gap: 8px;
  font-family: Menlo, Monaco, Consolas, "Courier New", monospace;
  font-size: 16px;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--bg);
  color: var(--white);
  touch-action: none;
  overscroll-behavior: none;
}

button {
  min-height: 48px;
  border: 2px solid var(--white);
  border-radius: 8px;
  background: var(--button);
  color: var(--white);
  font: 700 1rem Menlo, Monaco, Consolas, "Courier New", monospace;
  letter-spacing: 0;
  cursor: pointer;
  touch-action: manipulation;
}

button:active {
  transform: translateY(1px);
}

.game-shell {
  position: fixed;
  inset: 0;
  display: grid;
  grid-template-rows: minmax(76px, calc(76px + env(safe-area-inset-top))) minmax(0, 1fr) minmax(206px, calc(206px + env(safe-area-inset-bottom)));
  width: 100%;
  height: 100%;
  background:
    linear-gradient(180deg, rgba(17, 25, 27, 0.86), rgba(5, 9, 10, 0.96)),
    radial-gradient(circle at 50% 12%, rgba(110, 255, 67, 0.08), transparent 32%),
    var(--bg);
}

.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: calc(18px + env(safe-area-inset-top)) 24px 8px;
  z-index: 4;
}

.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 80px;
  height: 50px;
  background: var(--button);
  border-color: var(--line);
}

.icon-button span {
  display: block;
  width: 6px;
  height: 26px;
  border-radius: 2px;
  background: var(--white);
}

.score {
  min-width: 84px;
  text-align: right;
  font-size: 1.875rem;
  font-weight: 700;
}

.board-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
  padding: 0 7px 8px;
}

canvas {
  display: block;
  width: min(calc(100vw - 14px), calc((100vh - 300px) * 0.833333));
  max-width: 560px;
  height: auto;
  aspect-ratio: 5 / 6;
  border: 2px solid var(--line);
  background: var(--board);
  image-rendering: pixelated;
  box-shadow: 0 14px 40px var(--shadow);
}

.controls {
  display: grid;
  grid-template-columns: repeat(3, var(--control-size));
  grid-template-rows: repeat(3, var(--control-size));
  justify-content: center;
  align-content: start;
  gap: var(--control-gap);
  padding: 8px 16px calc(16px + env(safe-area-inset-bottom));
  z-index: 4;
}

.controls button {
  width: var(--control-size);
  height: var(--control-size);
  padding: 0;
  border-color: #dce8df;
  font-size: 1.65rem;
  line-height: 1;
}

.controls [data-direction="up"] {
  grid-column: 2;
  grid-row: 1;
}

.controls [data-direction="left"] {
  grid-column: 1;
  grid-row: 2;
}

.controls [data-direction="right"] {
  grid-column: 3;
  grid-row: 2;
}

.controls [data-direction="down"] {
  grid-column: 2;
  grid-row: 3;
}

.overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(24px + env(safe-area-inset-top)) 18px calc(24px + env(safe-area-inset-bottom));
  background: rgba(2, 4, 5, 0.18);
  z-index: 8;
}

.overlay[hidden] {
  display: none;
}

.overlay-main {
  background: transparent;
}

body[data-screen="mainMenu"] .top-bar,
body[data-screen="mainMenu"] .board-wrap,
body[data-screen="mainMenu"] .controls,
body[data-screen="settings"] .top-bar,
body[data-screen="settings"] .board-wrap,
body[data-screen="settings"] .controls {
  visibility: hidden;
}

.panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: min(100%, 340px);
  min-height: 320px;
  padding: 34px 22px 26px;
  border: 2px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 18px 48px var(--shadow);
}

.panel-danger {
  border-color: var(--red);
}

.panel-pause {
  min-height: 334px;
}

.panel-settings {
  min-height: 430px;
}

h1,
h2,
p {
  margin: 0;
  text-align: center;
}

h1 {
  max-width: 100%;
  color: var(--green);
  font-size: 2.15rem;
  line-height: 1.1;
}

h2 {
  max-width: 100%;
  margin-bottom: 28px;
  font-size: 1.8rem;
  line-height: 1.1;
}

p {
  color: var(--white);
  font-size: 1.2rem;
  font-weight: 700;
}

.best-line {
  margin: 22px 0 28px;
}

.panel button {
  width: min(100%, 250px);
  margin-top: 14px;
  padding: 0 16px;
  overflow-wrap: anywhere;
}

.panel .primary {
  background: var(--button-primary);
}

.panel-danger p + p {
  margin-top: 10px;
}

.panel-danger button:first-of-type {
  margin-top: 28px;
}

.panel-settings p {
  margin: 22px 0 6px;
}

.stepper {
  display: grid;
  grid-template-columns: 52px 52px;
  gap: 64px;
  margin-bottom: 10px;
}

.stepper button {
  width: 52px;
  min-width: 52px;
  margin-top: 8px;
  padding: 0;
  font-size: 1.3rem;
}

@media (max-height: 700px) {
  .game-shell {
    grid-template-rows: minmax(68px, calc(68px + env(safe-area-inset-top))) minmax(0, 1fr) minmax(184px, calc(184px + env(safe-area-inset-bottom)));
  }

  :root {
    --control-size: 54px;
    --control-gap: 8px;
  }

  .panel {
    min-height: 300px;
    padding-top: 26px;
    padding-bottom: 22px;
  }

  .panel-settings {
    min-height: 404px;
  }
}

@media (min-width: 760px) {
  :root {
    --control-size: 60px;
    --control-gap: 10px;
  }

  .game-shell {
    grid-template-columns: minmax(180px, 1fr) minmax(320px, 560px) minmax(180px, 1fr);
    grid-template-rows: minmax(84px, calc(84px + env(safe-area-inset-top))) minmax(0, 1fr);
  }

  .top-bar {
    grid-column: 2;
    grid-row: 1;
  }

  .board-wrap {
    grid-column: 2;
    grid-row: 2;
    padding-bottom: 24px;
  }

  .controls {
    grid-column: 3;
    grid-row: 2;
    align-content: center;
    padding-bottom: calc(24px + env(safe-area-inset-bottom));
  }
}