/* TapKhel shared tokens. Every page is a chalkboard in a wooden frame: one dark look on purpose. */
:root {
  --board: #2f4a3a;
  --board-deep: #24392d;
  --board-line: #3d5c49;
  --chalk: #f1efe6;
  --chalk-dim: #b9c4b9;
  --chalk-yellow: #f3d36b;
  --chalk-pink: #f2a1a1;
  --chalk-green: #a8e0a0;
  --chalk-blue: #9cc8f0;
  --wood: #8a5a33;
  --wood-dark: #5e3b20;
  --card: #f6eedb;
  --card-ink: #3b2d22;
  --frieze: #d9b54a;
  --font-display: "Cabin Sketch", "Chalkboard SE", "Comic Sans MS", cursive;
  --font-body: "Atkinson Hyperlegible", system-ui, -apple-system, "Segoe UI", sans-serif;
  color-scheme: dark;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--wood-dark);
  color: var(--chalk);
  font-family: var(--font-body);
  font-size: 16px;
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
}
a { color: var(--chalk-yellow); }
h1, h2, h3, .display { font-family: var(--font-display); font-weight: 700; margin: 0; text-wrap: balance; }
p { margin: 0; line-height: 1.55; color: var(--chalk-dim); }

.frame {
  min-height: 100%;
  display: flex;
  justify-content: center;
  background: linear-gradient(180deg, var(--wood) 0%, var(--wood-dark) 100%);
  padding-top: max(10px, env(safe-area-inset-top, 0px));
  padding-bottom: max(10px, env(safe-area-inset-bottom, 0px));
  padding-left: max(10px, env(safe-area-inset-left, 0px));
  padding-right: max(10px, env(safe-area-inset-right, 0px));
}
.board {
  width: 100%;
  max-width: 540px;
  display: flex;
  flex-direction: column;
  border-radius: 6px;
  background:
    radial-gradient(ellipse at 20% 15%, rgba(255,255,255,.06), transparent 45%),
    radial-gradient(ellipse at 80% 70%, rgba(255,255,255,.045), transparent 50%),
    var(--board);
  box-shadow: inset 0 0 40px rgba(0,0,0,.45), 0 2px 0 var(--wood-dark);
  overflow: hidden;
  position: relative;
}

/* Alphabet frieze, like the cards above every classroom board */
.frieze {
  display: flex;
  gap: 6px;
  padding: 8px 10px 6px;
  overflow: hidden;
  background: var(--frieze);
  flex-shrink: 0;
  min-height: 42px;
}
.frieze span {
  flex: 0 0 auto;
  width: 38px;
  padding: 3px 0 2px;
  background: var(--card);
  color: var(--card-ink);
  border-radius: 2px;
  text-align: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  line-height: 1;
  box-shadow: 0 1px 0 rgba(0,0,0,.25);
}
.frieze small { display: block; font-family: var(--font-body); font-weight: 400; font-size: 8px; margin-top: 2px; }

.eyebrow { font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--chalk-yellow); font-weight: 700; }

.btn {
  appearance: none;
  border: 2px solid var(--chalk);
  background: transparent;
  color: var(--chalk);
  font: 700 18px/1.1 var(--font-body);
  padding: 14px 16px;
  border-radius: 10px 14px 9px 13px;
  cursor: pointer;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.btn small { font-weight: 400; font-size: 13px; color: var(--chalk-dim); }
.btn:hover { background: rgba(255,255,255,.05); }
.btn.primary { background: var(--chalk); color: var(--board-deep); border-color: var(--chalk); }
.btn.primary small { color: #4c6656; }
.btn.wa { background: #25d366; border-color: #25d366; color: #0b3d1f; justify-content: center; }
.btn.center { justify-content: center; text-align: center; }
:focus-visible { outline: 3px solid var(--chalk-yellow); outline-offset: 2px; }

.site-foot {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  justify-content: center;
  padding: 14px 16px;
  font-size: 13px;
  color: var(--chalk-dim);
  border-top: 2px dashed var(--board-line);
}
.site-foot a { color: var(--chalk-dim); }

/* Stand-in for a rewarded ad until AdSense is live (see shared/ads.js) */
.ad-placeholder {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  background: rgba(10, 18, 13, .92);
  padding: 24px;
}
.ad-placeholder div {
  display: grid;
  gap: 8px;
  text-align: center;
  border: 2px dashed var(--chalk-dim);
  border-radius: 12px;
  padding: 28px 22px;
  max-width: 320px;
}
.ad-placeholder b { font: 700 26px var(--font-display); }
.ad-placeholder span { color: var(--chalk-dim); font-size: 14px; }
.ad-placeholder i { font: 700 40px var(--font-display); font-style: normal; color: var(--chalk-yellow); }

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