/*
   Simple 1920x1080 “game canvas” that scales to viewport.
   Students only edit HTML files.
*/

:root {
  --scale: 1;
  --gap-sm: 140px;
  --gap-md: 22px;
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  background: #111;
}

img {
  -webkit-user-drag: none;
  user-drag: none;
}

.viewport {
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  position: relative;
  background: #111;
}

/* Fixed design canvas (1920x1080 design pixels) */
.screen {
  width: 1920px;
  height: 1080px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) scale(var(--scale, 1));
  transform-origin: center;
  overflow: hidden;

  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

.bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
  user-select: none;
}

.ui {
  position: absolute;
  inset: 0;
}

.asset {
  display: block;
  height: auto;
  pointer-events: none;
  user-select: none;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

.region {
  position: absolute;
  display: grid;
  gap: var(--gap-md);
}

.stack-vertical {
  grid-auto-flow: row;
  justify-items: center;
}

.gap-sm {
  gap: var(--gap-sm);
}

.gap-md {
  gap: var(--gap-md);
}

/* -------- Layout presets -------- */

/* START */
.layout-start .header {
  top: 550px;
  left: 960px;
  transform: translate(-50%, -50%);
}

.layout-start .menu {
  top: 575px;
  left: 960px;
  transform: translate(-50%, -50%);
}

/* MAIN MENU */
.layout-menu .header {
  top: 0px;
  left: 0px;

  justify-items: start;
}

.layout-menu .menu {
  top: 660px;
  left: 220px;
  transform: translate(0, -50%);
  justify-items: start;
}

.layout-menu .footer {
  top: 1050px;
  left: 120px;
  transform: translate(0, -100%);
  justify-items: start;
}

/* SETTINGS */
.layout-settings .header {
  top: 150px;
  left: 0px;
  transform: translate(0, -50%);
  justify-items: start;
}

.layout-settings .content {
  top: 540px;
  left: 960px;
  transform: translate(-50%, -50%);
}

.layout-settings .footer {
  top: 1050px;
  left: 120px;
  transform: translate(0, -100%);
  justify-items: start;
}

/* -------- Interactive image button (one <img>) -------- */

.img-btn {
  display: inline-block;
  cursor: pointer;
  text-decoration: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.img-btn img {
  display: block;
  height: auto;
  max-width: 100%;
  pointer-events: none;
  user-select: none;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

/* Keyboard focus */
.img-btn:focus-visible {
  outline: 3px solid rgba(255,255,255,.6);
  outline-offset: 10px;
  border-radius: 10px;
}

/* -------- Settings toggles (one <img>) -------- */

.settings-list {
  display: grid;
  gap: 18px;
  justify-items: center;
}

/* Make toggle act like a button, but still simple */
.toggle {
  background: transparent;
  border: 0;
  padding: 0;
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.toggle img {
  display: block;
  height: auto;
  max-width: 100%;
  pointer-events: none;
  user-select: none;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

.toggle:focus-visible {
  outline: 3px solid rgba(255,255,255,.6);
  outline-offset: 10px;
  border-radius: 10px;
}