* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  font-family: system-ui, sans-serif;
  background: #052e16;
  color: #f0fdf4;
  text-align: center;
}

:focus-visible {
  outline: 2px solid #fbbf24;
  outline-offset: 2px;
}

.hud {
  width: 100%;
  padding: 0.75rem;
  background: #064e3b;
}

.hud h1 {
  margin: 0;
  font-size: 1.25rem;
}

.hud__score {
  margin: 0.25rem 0 0;
  font-size: 1rem;
}

main {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem;
}

canvas {
  display: block;
  width: 300px;
  height: 300px;
  max-width: 100%;
  background: #111;
  border: 2px solid #22c55e;
  border-radius: 4px;
  /* Свайпы управляют змейкой — скролл страницы жестом по полю запрещён. */
  touch-action: none;
}

.pad {
  display: grid;
  grid-template-columns: repeat(3, 56px);
  grid-template-rows: repeat(2, 48px);
  grid-template-areas:
    '. up .'
    'left down right';
  gap: 6px;
  margin-top: 0.5rem;
}

.pad__btn {
  border: 0;
  border-radius: 10px;
  background: #064e3b;
  color: #f0fdf4;
  font: inherit;
  font-size: 1.25rem;
  cursor: pointer;
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
}

.pad__btn:hover {
  background: #065f46;
}

.pad__btn:active {
  background: #047857;
}

.pad__btn--up { grid-area: up; }
.pad__btn--left { grid-area: left; }
.pad__btn--down { grid-area: down; }
.pad__btn--right { grid-area: right; }

.status {
  min-height: 1.5rem;
  margin: 0;
  color: #fecaca;
  font-weight: 600;
}

.hint {
  margin: 0;
  color: #bbf7d0;
  font-size: 0.875rem;
}