/** Reset + page shell. Keep this file free of component styling. */

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

* {
  margin: 0;
  padding: 0;
}

html,
body {
  height: 100%;
}

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

body {
  font-family: var(--font-ui);
  font-size: var(--fs-base);
  line-height: var(--lh-body);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
  overscroll-behavior: none;
  touch-action: manipulation;
}

img,
svg,
canvas {
  display: block;
  max-width: 100%;
}

button,
input,
select {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

h1,
h2,
h3 {
  font-weight: 700;
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-tight);
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

ul {
  list-style: none;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}

::selection {
  background: var(--accent);
  color: var(--accent-ink);
}

/* ---------------------------------------------------------------- */

.app {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: calc(var(--safe-t)) calc(var(--safe-r)) calc(var(--safe-b)) calc(var(--safe-l));
  background:
    radial-gradient(120% 80% at 50% 0%, #113059 0%, transparent 60%),
    radial-gradient(90% 60% at 20% 100%, #0b2444 0%, transparent 55%),
    var(--bg);
}

.stage {
  position: relative;
  width: 100%;
  height: 100%;
  max-width: 100%;
  display: grid;
  place-items: center;
  isolation: isolate;
  /* The overlays live inside the stage, not the window — on a desktop the
     stage is a 16:9 box that can be much shorter than the viewport. Sizing
     their layout off the stage is the only way the density rules match what
     the player actually sees. */
  container-type: size;
  container-name: stage;
}

#game {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  background: var(--c-deep);
  touch-action: none;
}

/* On a roomy desktop screen the game sits in a framed card. */
@media (min-width: 1100px) and (min-height: 720px) {
  .app {
    padding: var(--s-5);
  }
  .stage {
    width: min(100%, 1500px);
    aspect-ratio: 16 / 9;
    height: auto;
    max-height: 100%;
    border-radius: var(--r-lg);
    overflow: hidden;
    outline: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
  }
}

.noscript {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: var(--s-6);
  text-align: center;
  background: var(--bg);
  font-size: var(--fs-md);
}

/* Utility */
[hidden] {
  display: none !important;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}