/* ============================================================================
   Children's Bible Trivia (studies/trivia.html, kids-trivia.js). Built on
   lamp.css: its tokens, buttons and light/dark palettes. Sized for a class
   gathered round one screen: big tap targets, a question card that fills
   the room, and a full-screen mode that drops the site header. Spec:
   docs/superpowers/specs/2026-10-21-children-trivia-design.md
   ============================================================================ */

:root.lamp {
  --kt-radius: 18px;
  --kt-yes: #166534; --kt-yes-bg: #DCFCE7;
  --kt-no: #9F1239;  --kt-no-bg: #FFE4E6;
  /* Team colors: a stripe and dot beside the name; names stay in ink. */
  --kt-c0: #C2410C; --kt-c1: #1D4ED8; --kt-c2: #15803D; --kt-c3: #7E22CE; --kt-c4: #BE123C; --kt-c5: #0F766E;
  --kt-on-team: #FFFFFF;   /* text on a filled team color */
}
@media (prefers-color-scheme: dark) {
  :root.lamp:not([data-lamp-theme="light"]) {
    --kt-yes: #86EFAC; --kt-yes-bg: #14301F;
    --kt-no: #FDA4AF;  --kt-no-bg: #3A1620;
    --kt-c0: #FB923C; --kt-c1: #60A5FA; --kt-c2: #4ADE80; --kt-c3: #C084FC; --kt-c4: #FB7185; --kt-c5: #2DD4BF;
    --kt-on-team: #12151C;
  }
}
:root.lamp[data-lamp-theme="dark"] {
  --kt-yes: #86EFAC; --kt-yes-bg: #14301F;
  --kt-no: #FDA4AF;  --kt-no-bg: #3A1620;
  --kt-c0: #FB923C; --kt-c1: #60A5FA; --kt-c2: #4ADE80; --kt-c3: #C084FC; --kt-c4: #FB7185; --kt-c5: #2DD4BF;
  --kt-on-team: #12151C;
}
.lamp .kt-c0 { --team: var(--kt-c0); } .lamp .kt-c1 { --team: var(--kt-c1); } .lamp .kt-c2 { --team: var(--kt-c2); }
.lamp .kt-c3 { --team: var(--kt-c3); } .lamp .kt-c4 { --team: var(--kt-c4); } .lamp .kt-c5 { --team: var(--kt-c5); }

.lamp .kt { margin: 8px 0 0; }
.lamp .kt button { cursor: pointer; }
.lamp .kt button:disabled { cursor: not-allowed; opacity: .5; }
.lamp .kt [tabindex="-1"]:focus { outline: none; }
.lamp .kt kbd {
  display: inline-block; min-width: 1.6em; padding: 1px 5px; border-radius: 5px; text-align: center;
  border: 1px solid var(--border); background: var(--card); font: 600 12px/1.4 var(--f-ui);
}
.lamp .kt-head { margin: 6px 0 22px; max-width: 72ch; }
.lamp .kt-head h2 { margin: 0; font: 600 clamp(28px, 4.4vw, 44px)/1.1 var(--f-display); }
.lamp .kt-sub { margin: 8px 0 0; font: 17px/1.55 var(--f-read); color: var(--muted); }
.lamp .kt-count { margin: 10px 0 0; font-weight: 600; }
.lamp .kt-row { margin: 22px 0 0; }

/* The row above each screen: back, and while playing the progress. */
.lamp .kt-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 18px; margin: 18px 0 14px; }
.lamp .kt-back, .lamp .kt-full-btn {
  min-height: 44px; padding: 0 16px; border-radius: 999px;
  background: transparent; border: 1px solid var(--border); font-weight: 600; font-size: 15px;
}
.lamp .kt-back:hover, .lamp .kt-full-btn:hover { border-color: var(--ink); }
.lamp .kt-full-btn { margin-left: auto; }
.lamp .kt-progress { display: flex; align-items: center; gap: 12px; flex: 1 1 220px; font-size: 15px; color: var(--muted); }
.lamp .kt-progress b { color: var(--ink); }
.lamp .kt-meter { flex: 1; max-width: 320px; height: 8px; border-radius: 4px; background: var(--soft); overflow: hidden; }
.lamp .kt-meter i { display: block; height: 100%; background: var(--accent-bright); transition: width .3s ease; }

/* ---- Setup ----------------------------------------------------------------- */
.lamp .kt-step { margin: 0 0 30px; }
.lamp .kt-step[hidden] { display: none; }
.lamp .kt-h { display: flex; align-items: center; gap: 12px; margin: 0 0 14px; font: 600 24px/1.2 var(--f-display); }
.lamp .kt-num {
  display: inline-grid; place-items: center; width: 36px; height: 36px; border-radius: 50%;
  background: var(--ink); color: var(--on-ink); font: 600 17px/1 var(--f-ui);
}
.lamp .kt-grades { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(200px, 100%), 1fr)); gap: 14px; }
.lamp .kt-grade {
  display: flex; flex-direction: column; align-items: flex-start; gap: 4px; padding: 18px 22px;
  background: var(--card); border: 2px solid var(--rule); border-radius: var(--kt-radius); text-align: left;
  font-size: 16px; font-weight: 500; transition: border-color .15s ease, transform .15s ease;
}
.lamp .kt-grade:hover { border-color: var(--accent-bright); transform: translateY(-2px); }
.lamp .kt-grade-big { font: 600 40px/1 var(--f-display); }
.lamp .kt-grade[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--on-ink); }
.lamp .kt-topics { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(280px, 100%), 1fr)); gap: 14px; }
.lamp .kt-topic {
  display: flex; flex-direction: column; align-items: flex-start; gap: 6px; padding: 18px 22px; text-align: left;
  background: var(--card); border: 2px solid var(--rule); border-radius: var(--kt-radius);
  transition: border-color .15s ease, transform .15s ease;
}
.lamp .kt-topic:hover { border-color: var(--accent-bright); transform: translateY(-2px); }
.lamp .kt-topic-t { font: 600 22px/1.2 var(--f-display); }
.lamp .kt-topic-s { font: 16px/1.5 var(--f-read); color: var(--muted); }
.lamp .kt-topic-n { margin-top: auto; padding-top: 8px; font-size: 13px; font-weight: 600; color: var(--accent); }
.lamp .kt-topic-all { border-style: dashed; }

/* ---- Menu -------------------------------------------------------------------- */
.lamp .kt-options { display: grid; gap: 14px; max-width: 760px; }
.lamp .kt-opt, .lamp .kt-opt-main {
  display: flex; flex-direction: column; align-items: flex-start; gap: 4px; width: 100%;
  padding: 20px 24px; text-align: left; background: var(--card); color: var(--ink);
  border: 2px solid var(--rule); border-radius: var(--kt-radius); transition: border-color .15s ease;
}
.lamp .kt-opt:hover, .lamp .kt-opt-main:hover:not(:disabled) { border-color: var(--accent-bright); }
.lamp .kt-opt-t { font: 600 26px/1.15 var(--f-display); }
.lamp .kt-opt-d { font-size: 15px; color: var(--muted); }
.lamp .kt-opt-play { display: flex; gap: 10px; align-items: stretch; padding: 0; border: 0; background: none; }
.lamp .kt-opt-play .kt-opt-main { flex: 1; background: var(--ink); border-color: var(--ink); color: var(--on-ink); }
.lamp .kt-opt-play .kt-opt-main .kt-opt-t { font-size: 32px; }
.lamp .kt-opt-play .kt-opt-main .kt-opt-d { color: var(--on-ink); opacity: .8; }
.lamp .kt-opt-play .kt-opt-main:hover:not(:disabled) { opacity: .92; }
.lamp .kt-opt-alt {
  flex: none; padding: 0 22px; background: var(--card); border: 2px solid var(--rule); border-radius: var(--kt-radius);
  font-weight: 600; font-size: 16px;
}
.lamp .kt-opt-alt:hover { border-color: var(--ink); }
.lamp .kt-dl { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; margin: 22px 0 0; max-width: 760px; }
.lamp .kt-dl .btn:disabled { opacity: .6; cursor: progress; }
.lamp .kt-dl-d { margin: 0; flex: 1 1 260px; font-size: 14px; color: var(--muted); }
.lamp .kt-settings { margin: 26px 0 0; padding: 14px 18px; max-width: 760px; border: 1px solid var(--rule); border-radius: var(--radius); }
.lamp .kt-settings legend { padding: 0 6px; font: 600 12px/1.3 var(--f-ui); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.lamp .kt-settings label { display: flex; align-items: center; gap: 10px; min-height: 40px; cursor: pointer; }
.lamp .kt input[type="checkbox"] { width: 20px; height: 20px; flex: none; accent-color: var(--accent-bright); cursor: pointer; }

/* ---- Play: the question card ---------------------------------------------------- */
.lamp .kt-card {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 18px;
  min-height: min(58vh, 620px); padding: clamp(24px, 5vw, 56px); text-align: center;
  background: var(--card); border: 2px solid var(--rule); border-top: 8px solid var(--accent-bright);
  border-radius: var(--kt-radius); box-shadow: 0 10px 30px rgba(27, 31, 42, .08);
}
.lamp .kt-card-top { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 8px 14px; margin: 0; }
.lamp .kt-card-topic { font: 600 13px/1.3 var(--f-ui); letter-spacing: .12em; text-transform: uppercase; color: var(--accent); }
.lamp .kt-worth {
  padding: 4px 12px; border-radius: 999px; border: 1px solid var(--accent-bright);
  font: 600 14px/1.2 var(--f-ui); color: var(--accent);
}
.lamp .kt-q { margin: 0; max-width: 26ch; font: 600 clamp(28px, 4.8vw, 60px)/1.18 var(--f-display); text-wrap: balance; }
.lamp .kt-q.is-long { max-width: 34ch; font-size: clamp(24px, 3.6vw, 46px); }
.lamp .kt-ans:empty { display: none; }
.lamp .kt-ans { animation: kt-in .35s ease both; }
.lamp .kt-a {
  margin: 0; padding: 14px 26px; border-radius: 14px; background: var(--soft);
  font: 500 clamp(22px, 3.4vw, 40px)/1.3 var(--f-read); text-wrap: balance;
}
.lamp .kt-ref { margin: 10px 0 0; font: 600 15px/1.3 var(--f-ui); color: var(--accent); }
@keyframes kt-in { from { opacity: 0; transform: translateY(10px) scale(.98); } to { opacity: 1; transform: none; } }

.lamp .kt-actions { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 12px 14px; margin-top: 6px; }
.lamp .kt-big {
  min-height: 60px; min-width: 180px; padding: 0 30px; border-radius: 999px;
  border: 2px solid var(--ink); background: var(--ink); color: var(--on-ink); font: 600 20px/1 var(--f-ui);
}
.lamp .kt-big:hover { opacity: .9; }
.lamp .kt-yes { background: var(--kt-yes-bg); color: var(--kt-yes); border-color: var(--kt-yes); }
.lamp .kt-no { background: var(--kt-no-bg); color: var(--kt-no); border-color: var(--kt-no); }
.lamp .kt-yes[aria-pressed="true"] { background: var(--kt-yes); color: var(--kt-yes-bg); }
.lamp .kt-no[aria-pressed="true"] { background: var(--kt-no); color: var(--kt-no-bg); }
.lamp .kt-who { flex-basis: 100%; margin: 0; font-weight: 600; color: var(--muted); }
.lamp .kt-award { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; flex-basis: 100%; }
.lamp .kt-award button {
  display: inline-flex; align-items: center; gap: 8px; min-height: 52px; padding: 0 20px; border-radius: 999px;
  background: var(--card); border: 2px solid var(--team); font: 600 17px/1 var(--f-ui);
}
.lamp .kt-award button[aria-pressed="true"] { background: var(--team); color: var(--kt-on-team); }
.lamp .kt-award button[aria-pressed="true"]::after { content: "+" attr(data-pts); font-size: 14px; }
.lamp .kt-next { min-width: 220px; }

.lamp .kt-under { display: flex; flex-wrap: wrap; align-items: flex-start; justify-content: space-between; gap: 14px 24px; margin: 16px 0 0; }
.lamp .kt-nav { display: flex; gap: 10px; }
.lamp .kt-nav button {
  min-height: 44px; padding: 0 18px; border-radius: 999px; background: transparent;
  border: 1px solid var(--border); font-weight: 600;
}
.lamp .kt-nav button:hover:not(:disabled) { border-color: var(--ink); }
.lamp .kt-score { display: flex; flex-wrap: wrap; gap: 10px; margin: 0; padding: 0; list-style: none; }
.lamp .kt-tally { display: inline-flex; align-items: baseline; gap: 6px; padding: 8px 16px; border-radius: 999px; font-weight: 500; }
.lamp .kt-tally b { font: 600 24px/1 var(--f-display); }
.lamp .kt-right { background: var(--kt-yes-bg); color: var(--kt-yes); }
.lamp .kt-wrong { background: var(--kt-no-bg); color: var(--kt-no); }
.lamp .kt-team {
  display: flex; align-items: center; gap: 10px; padding: 6px 8px 6px 14px;
  background: var(--card); border: 1px solid var(--rule); border-left: 6px solid var(--team); border-radius: 12px;
}
.lamp .kt-team-n { font-weight: 600; max-width: 14ch; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lamp .kt-team-s { min-width: 1.6em; text-align: center; font: 600 26px/1 var(--f-display); font-variant-numeric: tabular-nums; }
.lamp .kt-adj { display: inline-flex; gap: 4px; }
.lamp .kt-adj button {
  width: 34px; height: 34px; border-radius: 50%; background: transparent; border: 1px solid var(--border);
  font: 600 18px/1 var(--f-ui);
}
.lamp .kt-adj button:hover { border-color: var(--ink); }
.lamp .kt-keys { margin: 18px 0 0; font-size: 13px; color: var(--muted); }
@media (hover: none) { .lamp .kt-keys { display: none; } }

/* ---- Game over ----------------------------------------------------------------- */
.lamp .kt-done {
  margin: 0 auto; max-width: 720px; padding: clamp(24px, 5vw, 48px); text-align: center;
  background: var(--card); border: 2px solid var(--rule); border-top: 8px solid var(--accent-bright); border-radius: var(--kt-radius);
}
.lamp .kt-done h2 { margin: 0; font: 600 clamp(36px, 6vw, 64px)/1.05 var(--f-display); }
.lamp .kt-final { margin: 18px 0 0; font: 500 26px/1.3 var(--f-read); }
.lamp .kt-final b { font: 600 64px/1 var(--f-display); color: var(--accent); }
.lamp .kt-standings { list-style: none; margin: 22px 0 0; padding: 0; display: grid; gap: 10px; text-align: left; }
.lamp .kt-standings li {
  display: flex; align-items: center; gap: 14px; padding: 12px 18px;
  border: 1px solid var(--rule); border-left: 8px solid var(--team); border-radius: 12px; font-size: 18px;
}
.lamp .kt-standings b { margin-left: auto; font-variant-numeric: tabular-nums; }
.lamp .kt-place { min-width: 2.6em; font: 600 20px/1 var(--f-display); color: var(--muted); }
.lamp .kt-standings .is-first { background: var(--soft); border-color: var(--accent-bright); font-size: 22px; }
.lamp .kt-standings .is-first .kt-place { color: var(--accent); }
.lamp .kt-done-acts { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin: 26px 0 0; }

/* ---- Teams ------------------------------------------------------------------------ */
.lamp .kt-mode { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(220px, 100%), 1fr)); gap: 10px; max-width: 620px; margin: 0 0 20px; }
.lamp .kt-mode button {
  display: flex; flex-direction: column; align-items: flex-start; gap: 3px; padding: 12px 16px; text-align: left;
  background: var(--card); border: 2px solid var(--rule); border-radius: 14px; font-weight: 600; font-size: 17px;
}
.lamp .kt-mode small { font-weight: 400; font-size: 13px; color: var(--muted); }
.lamp .kt-mode button[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--on-ink); }
.lamp .kt-mode button[aria-pressed="true"] small { color: var(--on-ink); opacity: .8; }
.lamp .kt-roster { list-style: none; margin: 0 0 14px; padding: 0; display: grid; gap: 8px; max-width: 620px; }
.lamp .kt-roster li {
  display: flex; align-items: center; gap: 8px; padding: 6px 8px 6px 12px;
  background: var(--card); border: 1px solid var(--rule); border-left: 6px solid var(--team); border-radius: 12px;
}
.lamp .kt-dot { width: 14px; height: 14px; border-radius: 50%; background: var(--team); flex: none; }
.lamp .kt-roster input, .lamp .kt-add input {
  flex: 1; min-width: 0; min-height: 44px; padding: 0 12px;
  background: var(--paper); border: 1px solid var(--border); border-radius: 10px; font-size: 17px;
}
.lamp .kt-roster button {
  min-height: 40px; min-width: 40px; padding: 0 10px; border-radius: 10px;
  background: transparent; border: 1px solid var(--border); font-weight: 600;
}
.lamp .kt-roster button:hover:not(:disabled) { border-color: var(--ink); }
.lamp .kt-add { display: flex; gap: 10px; max-width: 620px; }

/* ---- Review --------------------------------------------------------------------- */
.lamp .kt-rv-tools { display: flex; flex-wrap: wrap; gap: 10px; margin: 0 0 16px; }
.lamp .kt-review { list-style: none; margin: 0; padding: 0; max-width: 880px; }
.lamp .kt-rv { display: flex; align-items: flex-start; gap: 8px 16px; border-top: 1px solid var(--rule); }
.lamp .kt-rv > label { flex: 1; min-width: 0; display: flex; align-items: flex-start; gap: 12px; padding: 14px 4px; cursor: pointer; }
.lamp .kt-rv-pts { flex: none; display: flex; align-items: center; gap: 8px; padding: 12px 4px; font-size: 13px; color: var(--muted); }
.lamp .kt-rv-pts select {
  min-height: 40px; padding: 0 8px; border-radius: 10px; cursor: pointer;
  background: var(--card); border: 1px solid var(--border); font: 600 16px/1 var(--f-ui); color: var(--ink);
}
.lamp .kt-rv-pts.is-changed select { border-color: var(--accent-bright); box-shadow: 0 0 0 1px var(--accent-bright); }
.lamp .kt-rv-pts small { font-size: 12px; }
.lamp .kt-rv input { margin-top: 4px; }
.lamp .kt-rv-n { min-width: 1.8em; font: 600 14px/1.9 var(--f-ui); color: var(--muted); font-variant-numeric: tabular-nums; }
.lamp .kt-rv-body { display: flex; flex-direction: column; gap: 4px; }
.lamp .kt-rv-q { font: 500 18px/1.45 var(--f-read); }
.lamp .kt-rv-a { font: 16px/1.5 var(--f-read); color: var(--muted); }
.lamp .kt-rv-a::before { content: "Answer: "; font: 600 12px/1 var(--f-ui); letter-spacing: .08em; text-transform: uppercase; color: var(--accent); }
.lamp .kt-rv-ref { font: 600 13px/1 var(--f-ui); color: var(--accent); white-space: nowrap; }
.lamp .kt-rv.is-off .kt-rv-body { opacity: .5; }
.lamp .kt-rv.is-off .kt-rv-q { text-decoration: line-through; }
.lamp .kt-rv-topic h3 { margin: 22px 0 6px; font: 600 13px/1.3 var(--f-ui); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }

/* ---- Full screen: the game alone ---------------------------------------------------- */
.lamp.kt-full .lh, .lamp.kt-full .lf, .lamp.kt-full .crumbs, .lamp.kt-full .kt-keys { display: none; }
.lamp.kt-full body { background: var(--paper); }
.lamp.kt-full .lw { max-width: none; padding: 0 clamp(16px, 3vw, 40px) 24px; }
.lamp.kt-full .kt-card { min-height: calc(100vh - 220px); }

@media (max-width: 560px) {
  .lamp .kt-opt-play { flex-direction: column; }
  .lamp .kt-opt-alt { min-height: 52px; }
  .lamp .kt-big { min-width: 0; flex: 1 1 140px; }
  .lamp .kt-roster li { flex-wrap: wrap; }
  .lamp .kt-roster input { flex-basis: calc(100% - 30px); }
  .lamp .kt-full-btn { margin-left: 0; }
  .lamp .kt-rv { flex-wrap: wrap; gap: 0; }
  .lamp .kt-rv > label { flex-basis: 100%; padding-bottom: 6px; }
  .lamp .kt-rv-pts { padding: 0 4px 12px 66px; }
}
@media (prefers-reduced-motion: reduce) {
  .lamp .kt-ans { animation: none; }
}

/* ---- Print: the review list as a teacher's answer sheet ------------------------------- */
@media print {
  .lamp .kt-bar, .lamp .kt-rv-tools, .lamp .kt-rv input, .lamp .kt-rv.is-off { display: none !important; }
  .lamp .kt-rv-pts select { border: 0; box-shadow: none; appearance: none; padding: 0; min-height: 0; }
  .lamp .kt-rv-pts small { display: none; }
  .lamp .kt-rv { break-inside: avoid; }
  .lamp .kt-rv label { padding: 6pt 0; }
}