/* =====================================================================
   GRAMMAR QUEST - look and feel
   Idea: an exercise book on a classroom desk. Ruled paper, a chalkboard
   header with a ruler along its edge, and highlighter-colour stickers.
   All sizes use rem so the game scales to any smart board.
   ===================================================================== */

:root {
  --ink: #17214D;
  --ink-soft: #4A5588;
  --board: #12363A;
  --paper: #F7FAFF;
  --rule: #D4E2FF;

  --yellow: #FFD84D;
  --pink: #FF7EB6;
  --mint: #37D6A0;
  --orange: #FF9A3D;
  --sky: #59C6FF;
  --violet: #9A82FF;
  --red: #FF5C5C;
  --blue: #2748D8;

  --pop: .28rem .28rem 0 var(--ink);
  --pop-sm: .18rem .18rem 0 var(--ink);
  --radius: 1.1rem;

  --font-head: "Arial Rounded MT Bold", "Nunito", "Trebuchet MS", "Segoe UI", system-ui, sans-serif;
  --font-body: "Segoe UI", "Nunito", "Trebuchet MS", system-ui, -apple-system, Roboto, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { font-size: clamp(13px, min(1.45vw, 2.4vh), 26px); }

body {
  margin: 0;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
}

button { font-family: inherit; color: inherit; }

/* ---------- the page: ruled paper with a margin line and punch holes ---------- */

.app {
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
  background: repeating-linear-gradient(var(--paper) 0 2.1rem, var(--rule) 2.1rem calc(2.1rem + 2px));
}

.app::before {                      /* red margin line */
  content: "";
  position: absolute;
  top: 0; bottom: 0; left: 4.3rem;
  width: 3px;
  background: rgba(255, 92, 92, .45);
  pointer-events: none;
}

.app::after {                       /* binder holes */
  content: "";
  position: absolute;
  top: 0; bottom: 0; left: 1rem;
  width: 1.4rem;
  pointer-events: none;
  background:
    radial-gradient(circle, #E3ECFA 0 .5rem, #B5C5E6 .5rem calc(.5rem + 2px), transparent calc(.5rem + 2px)) center 22% / 1.4rem 1.4rem no-repeat,
    radial-gradient(circle, #E3ECFA 0 .5rem, #B5C5E6 .5rem calc(.5rem + 2px), transparent calc(.5rem + 2px)) center 52% / 1.4rem 1.4rem no-repeat,
    radial-gradient(circle, #E3ECFA 0 .5rem, #B5C5E6 .5rem calc(.5rem + 2px), transparent calc(.5rem + 2px)) center 82% / 1.4rem 1.4rem no-repeat;
}

/* ---------- chalkboard header with a ruler hanging from it ---------- */

.topbar {
  position: relative;
  z-index: 3;
  flex: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .45rem 1.2rem .45rem 1rem;
  color: #fff;
  background: var(--board);
  border-bottom: 3px solid var(--ink);
}

.topbar::after {                    /* the ruler */
  content: "";
  position: absolute;
  left: 0; right: 0; top: 100%;
  height: 1rem;
  border-bottom: 3px solid var(--ink);
  background:
    linear-gradient(90deg, var(--ink) 2px, transparent 2px) 0 0 / .6rem 38% repeat-x,
    linear-gradient(90deg, var(--ink) 2px, transparent 2px) 0 0 / 1.8rem 70% repeat-x,
    var(--yellow);
}

.brand {
  display: flex;
  align-items: center;
  gap: .7rem;
  background: none;
  border: 0;
  padding: .1rem .4rem;
  border-radius: .8rem;
  cursor: pointer;
  color: #fff;
}
.brand-mark { display: block; width: 2.8rem; height: 2.8rem; }
.brand-mark svg { width: 100%; height: 100%; display: block; }
.brand-name { font-family: var(--font-head); font-size: 1.7rem; letter-spacing: .01em; }

.tools { display: flex; gap: .6rem; }
.tool {
  width: 2.8rem; height: 2.8rem;
  display: grid; place-items: center;
  background: transparent;
  border: 2px solid rgba(255, 255, 255, .55);
  border-radius: .8rem;
  cursor: pointer;
  padding: .4rem;
}
.tool svg { width: 100%; height: 100%; }
.tool:active { background: rgba(255, 255, 255, .2); }

.brand:focus-visible, .tool:focus-visible { outline: 3px solid var(--yellow); outline-offset: 2px; }

/* ---------- main area ---------- */

main {
  position: relative;
  z-index: 1;
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 2rem 1.6rem 1.2rem 5.6rem;
}

.notice { font-size: 1.4rem; padding: 2rem; }

/* ---------- buttons ---------- */

.btn {
  font-family: var(--font-head);
  font-size: 1.15rem;
  min-height: 3rem;
  padding: .65rem 1.5rem;
  color: var(--ink);
  background: var(--yellow);
  border: 3px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--pop-sm);
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition: transform .08s, box-shadow .08s;
}
.btn:active:not([disabled]) { transform: translate(.18rem, .18rem); box-shadow: 0 0 0 var(--ink); }
.btn:focus-visible, .tile:focus-visible, .opt:focus-visible, .chip:focus-visible,
.basket:focus-visible, .seg button:focus-visible, .name-field input:focus-visible {
  outline: 4px solid var(--blue);
  outline-offset: 3px;
}
.btn.primary { background: var(--blue); color: #fff; }
.btn.ghost { background: #fff; }
.btn.big { font-size: 1.4rem; padding: .8rem 2rem; }
.btn[disabled] { opacity: .45; cursor: not-allowed; box-shadow: none; }

/* =====================================================================
   START SCREENS
   ===================================================================== */

.home { max-width: 74rem; margin: 0 auto; display: flex; flex-direction: column; gap: 1.5rem; }

.stepper { list-style: none; margin: 0; padding: 0; display: flex; gap: .8rem; flex-wrap: wrap; }
.stepper li {
  display: flex; align-items: center; gap: .55rem;
  padding: .3rem 1rem .3rem .35rem;
  font-family: var(--font-head); font-size: 1.05rem;
  color: var(--ink-soft);
  background: #fff;
  border: 3px solid var(--ink);
  border-radius: 2rem;
}
.stepper li span {
  width: 1.9rem; height: 1.9rem;
  display: grid; place-items: center;
  color: var(--ink);
  background: var(--rule);
  border: 2.5px solid var(--ink);
  border-radius: 50%;
}
.stepper li.now { color: var(--ink); background: var(--yellow); }
.stepper li.now span { background: #fff; }
.stepper li.done { color: var(--ink); background: var(--mint); }
.stepper li.done span { background: #fff; }

.step-head { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }
.step-title { margin: 0; font-family: var(--font-head); font-size: 2.7rem; line-height: 1.1; font-weight: normal; text-wrap: balance; }
.step-sub { margin: .4rem 0 0; font-size: 1.25rem; color: var(--ink-soft); font-weight: 600; }
.mascot { flex: none; width: 5.6rem; height: 5.6rem; transform: rotate(9deg); }
.mascot svg { width: 100%; height: 100%; display: block; }

.tiles { display: grid; gap: 1.3rem; }
.tiles.grades { grid-template-columns: repeat(4, 1fr); }
.tiles.games { grid-template-columns: repeat(3, 1fr); }

.tile {
  min-height: 11.5rem;
  display: flex; flex-direction: column; align-items: flex-start; gap: .35rem;
  padding: 1.2rem 1.3rem;
  text-align: left;
  font: inherit;
  color: var(--ink);
  background: var(--tile);
  border: 3px solid var(--ink);
  border-radius: 1.4rem;
  box-shadow: var(--pop);
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition: transform .1s, box-shadow .1s;
}
.tile:hover { transform: translate(-.1rem, -.1rem); box-shadow: .4rem .4rem 0 var(--ink); }
.tile:active { transform: translate(.28rem, .28rem); box-shadow: 0 0 0 var(--ink); }
.big-num { font-family: var(--font-head); font-size: 4rem; line-height: 1; }
.tile-icon { width: 3.8rem; height: 3.8rem; display: block; }
.tile-icon svg { width: 100%; height: 100%; display: block; }
.tile-title { font-family: var(--font-head); font-size: 1.65rem; line-height: 1.15; }
.tile-sub { font-size: 1.1rem; font-weight: 700; }
.tile-note { font-size: 1.1rem; line-height: 1.35; }

.panel {
  display: flex; flex-direction: column; gap: 1.1rem;
  padding: 1.3rem 1.6rem;
  background: #fff;
  border: 3px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--pop);
}
.field-label { margin: 0; font-family: var(--font-head); font-size: 1.25rem; }
.field-note { margin: 0; font-size: 1.1rem; color: var(--ink-soft); font-weight: 600; }

.seg { display: flex; flex-wrap: wrap; gap: .7rem; }
.seg button {
  min-height: 3rem;
  padding: .5rem 1.3rem;
  font-family: var(--font-head); font-size: 1.15rem;
  background: #fff;
  border: 3px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--pop-sm);
  cursor: pointer;
  touch-action: manipulation;
}
.seg button[aria-pressed="true"] { background: var(--blue); color: #fff; }

.names { display: grid; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); gap: .9rem; }
.name-field { display: flex; align-items: center; gap: .7rem; }
.name-field input {
  flex: 1; min-width: 0;
  padding: .55rem .9rem;
  font: inherit; font-size: 1.2rem; color: var(--ink);
  background: var(--paper);
  border: 3px solid var(--ink);
  border-radius: .8rem;
}

.swatch {
  flex: none;
  width: 2.3rem; height: 2.3rem;
  display: grid; place-items: center;
  background: var(--tc);
  border: 3px solid var(--ink);
  border-radius: 50%;
}
.swatch svg { width: 70%; height: 70%; display: block; }

.actions { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }

/* =====================================================================
   GAME SCREEN
   ===================================================================== */

.play { height: 100%; display: flex; flex-direction: column; gap: .9rem; min-height: 0; }

.topline { display: flex; align-items: center; flex-wrap: wrap; gap: .8rem 1.2rem; }
.topline #turn { margin-left: auto; }
.scoreboard { display: flex; flex-wrap: wrap; gap: .8rem; }

.team {
  display: flex; align-items: center; gap: .6rem;
  padding: .35rem 1rem .35rem .45rem;
  background: #fff;
  border: 3px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--pop-sm);
  transition: transform .15s, background .15s;
}
.team.active { background: var(--tc); transform: translateY(-.2rem); }
.tname { font-family: var(--font-head); font-size: 1.1rem; }
.score { min-width: 2.6rem; text-align: right; font-family: var(--font-head); font-size: 1.9rem; line-height: 1; }
.team.pop .score { animation: popScore .5s ease-out; }
.streak { display: inline-flex; align-items: center; gap: .1rem; font-family: var(--font-head); font-size: 1rem; }
.streak svg { width: 1.3rem; height: 1.3rem; }

.hud { display: flex; align-items: center; flex-wrap: wrap; gap: .8rem 1.2rem; }
.dots { display: flex; gap: .4rem; align-items: center; }
.dots span { width: 1rem; height: 1rem; background: #fff; border: 2.5px solid var(--ink); border-radius: 50%; }
.dots span.done { background: var(--ink); }
.dots span.now { background: var(--yellow); transform: scale(1.3); }
.qcount { font-weight: 700; font-size: 1.1rem; }
.kind {
  display: inline-flex; align-items: center; gap: .45rem;
  padding: .15rem 1rem .15rem .3rem;
  font-family: var(--font-head); font-size: 1.05rem;
  background: var(--tile);
  border: 3px solid var(--ink);
  border-radius: 2rem;
}
.kind-icon { display: block; width: 1.9rem; height: 1.9rem; }
.kind-icon svg { width: 100%; height: 100%; display: block; }
.turn {
  margin-left: auto;
  padding: .25rem 1.1rem;
  font-family: var(--font-head); font-size: 1.2rem;
  background: var(--tc);
  border: 3px solid var(--ink);
  border-radius: 2rem;
}

.stage { flex: 1; min-height: 0; overflow: auto; display: flex; flex-direction: column; gap: 1rem; padding: .2rem .5rem 1rem .1rem; }
.instruction { margin: 0; font-size: 1.25rem; font-weight: 600; color: var(--ink-soft); }
.sort-title { margin: 0; font-family: var(--font-head); font-weight: normal; font-size: 2rem; }

.card {
  padding: 1.4rem 1.8rem;
  background: #fff;
  border: 3px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--pop);
}
.prompt { margin: 0; font-size: 2.3rem; line-height: 1.5; font-weight: 600; }

.blank {
  display: inline-block;
  min-width: 7rem;
  margin: 0 .3rem;
  padding: 0 .5rem;
  text-align: center;
  border-bottom: .3rem solid var(--ink);
  background: linear-gradient(transparent 55%, var(--yellow) 55%);
}
.blank.filled { background: var(--mint); border-radius: .5rem .5rem 0 0; }

/* Fill the Blank: answer buttons */
.options { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.opt {
  display: flex; align-items: center; gap: .9rem;
  min-height: 4.6rem;
  padding: .7rem 1.2rem;
  font-family: var(--font-head); font-size: 1.8rem; text-align: left;
  background: var(--oc);
  border: 3px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--pop);
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition: transform .08s, box-shadow .08s;
}
.opt:active { transform: translate(.28rem, .28rem); box-shadow: 0 0 0 var(--ink); }
.opt .key {
  flex: none; width: 2.5rem; height: 2.5rem;
  display: grid; place-items: center;
  font-size: 1.2rem;
  background: #fff;
  border: 3px solid var(--ink);
  border-radius: 50%;
}
.options.locked .opt { pointer-events: none; }
.opt.good { background: var(--mint); }
.opt.good::after { content: "\2713"; margin-left: auto; font-size: 1.8rem; }
.opt.bad { background: var(--red); color: #fff; }
.opt.bad::after { content: "\2717"; margin-left: auto; font-size: 1.8rem; }
.opt.dim { opacity: .45; }

/* Words that can be tapped (Spot the Mistake, Sentence Builder, Word Sorter) */
.chip {
  padding: .45rem 1.1rem;
  font-size: 1.8rem; line-height: 1.2;
  background: #fff;
  border: 3px solid var(--ink);
  border-radius: .8rem;
  box-shadow: var(--pop-sm);
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}
.chip:active { transform: translate(.18rem, .18rem); box-shadow: 0 0 0 var(--ink); }
.chip.big { font-size: 2.2rem; }
.chip.sel { background: var(--yellow); transform: translateY(-.25rem); }
.chip.right { background: var(--mint); }
.chip.target { background: var(--yellow); }
.chip.wrong { background: var(--red); color: #fff; animation: shake .4s; }
.locked .chip { pointer-events: none; }

.sentence { display: flex; flex-wrap: wrap; gap: .9rem; }

/* Sentence Builder */
.tray {
  min-height: 6rem;
  display: flex; flex-wrap: wrap; align-items: center; gap: .7rem;
  padding: 1rem 1.2rem;
  background: #fff;
  border: 3px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--pop);
}
.tray:empty::before { content: attr(data-empty); font-size: 1.3rem; color: var(--ink-soft); }
.tray.ok { background: #E3FBF1; }
.tray.bad { background: #FFE6F1; }
.bank {
  min-height: 5.5rem;
  display: flex; flex-wrap: wrap; justify-content: center; gap: .8rem;
  padding: 1rem;
  border: 3px dashed var(--ink-soft);
  border-radius: var(--radius);
}
.build-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 1rem; }
.hint-msg { font-size: 1.25rem; font-weight: 700; color: #B3174F; }
.shake { animation: shake .4s; }

/* Word Sorter */
.pool { display: flex; flex-wrap: wrap; justify-content: center; gap: .8rem; min-height: 4.5rem; }
.baskets { display: grid; grid-template-columns: repeat(var(--cols, 2), 1fr); gap: 1rem; }
.basket {
  display: flex; flex-direction: column; align-items: stretch; gap: .6rem;
  min-height: 9.5rem;
  padding: .8rem;
  text-align: left;
  background: var(--bc);
  border: 3px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--pop);
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}
.basket-name { font-family: var(--font-head); font-size: 1.5rem; }
.placed { display: flex; flex-wrap: wrap; gap: .45rem; }
.mini { padding: .1rem .7rem; font-size: 1.15rem; background: #fff; border: 2.5px solid var(--ink); border-radius: .6rem; }
.basket.nope { animation: shake .4s; background: var(--red); }
.locked .basket { pointer-events: none; }

/* Feedback panel under the question */
.feedback {
  display: flex; align-items: center; gap: 1.4rem;
  padding: 1rem 1.4rem;
  background: var(--mint);
  border: 3px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--pop);
  animation: slideUp .25s ease-out;
}
.feedback[hidden] { display: none; }
.feedback.bad { background: var(--pink); }
.feedback.mid { background: var(--yellow); }
.fb-body { flex: 1; min-width: 0; }
.fb-title { margin: 0; display: flex; align-items: baseline; flex-wrap: wrap; gap: .3rem 1rem; font-family: var(--font-head); font-weight: normal; font-size: 1.8rem; }
.fb-pts { font-size: 1.25rem; }
.fb-text { margin: .3rem 0 0; max-width: 62ch; font-size: 1.25rem; line-height: 1.45; }
.feedback .btn { flex: none; white-space: nowrap; }

/* =====================================================================
   RESULTS
   ===================================================================== */

.results { max-width: 54rem; margin: 0 auto; display: flex; flex-direction: column; align-items: center; gap: 1.2rem; text-align: center; }
.trophy { width: 8rem; height: 8rem; }
.trophy svg { width: 100%; height: 100%; display: block; }
.results h1 { margin: 0; font-family: var(--font-head); font-weight: normal; font-size: 3rem; line-height: 1.1; text-wrap: balance; }
.results .lead { margin: 0; font-size: 1.35rem; font-weight: 600; color: var(--ink-soft); }
.ranking { width: 100%; display: flex; flex-direction: column; gap: .8rem; }
.rank-row {
  display: flex; align-items: center; gap: .9rem;
  padding: .6rem 1rem;
  text-align: left;
  background: #fff;
  border: 3px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--pop-sm);
}
.rank-name { flex: 0 0 11rem; font-family: var(--font-head); font-size: 1.25rem; }
.rank-bar { flex: 1; height: 1.4rem; background: var(--rule); border: 2.5px solid var(--ink); border-radius: 1rem; overflow: hidden; }
.rank-bar i { display: block; height: 100%; background: var(--tc); border-right: 2.5px solid var(--ink); }
.rank-score { flex: 0 0 4.5rem; text-align: right; font-family: var(--font-head); font-size: 1.8rem; }
.results .actions { justify-content: center; }

.confetti { position: fixed; inset: 0; z-index: 20; overflow: hidden; pointer-events: none; }
.confetti i { position: absolute; top: -2rem; width: .7rem; height: 1.2rem; animation: fall linear forwards; }

/* =====================================================================
   MOTION
   ===================================================================== */

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-.5rem); }
  40% { transform: translateX(.5rem); }
  60% { transform: translateX(-.35rem); }
  80% { transform: translateX(.35rem); }
}
@keyframes popScore { 0% { transform: scale(1); } 40% { transform: scale(1.3); } 100% { transform: scale(1); } }
@keyframes slideUp { from { transform: translateY(1.2rem); opacity: 0; } to { transform: none; opacity: 1; } }
@keyframes fall { to { transform: translateY(110vh) rotate(720deg); } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* =====================================================================
   SMALLER SCREENS (tablets and phones)
   ===================================================================== */

@media (max-width: 900px) {
  .tiles.grades { grid-template-columns: repeat(2, 1fr); }
  .tiles.games { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  html { font-size: 14px; }
  .app::before, .app::after { display: none; }
  main { padding: 1.6rem 1rem 1rem; }
  .brand-name { font-size: 1.3rem; }
  .step-title { font-size: 2rem; }
  .mascot { display: none; }
  .tiles.grades, .tiles.games { grid-template-columns: 1fr; }
  .options { grid-template-columns: 1fr; }
  .prompt { font-size: 1.7rem; }
  .feedback { flex-direction: column; align-items: stretch; }
  .turn { margin-left: 0; }
  .rank-name { flex-basis: 7rem; }
}

.step { display: flex; flex-direction: column; gap: 1.5rem; }

/* children of the stage keep their natural height; the stage itself scrolls */
.stage > * { flex-shrink: 0; }