/* ==========================================================================
   KW AccessAbility Trivia — styles
   Brand: teal (#02807e) + orange (#f06828), Poppins headings, Roboto body.
   Accessibility notes:
   - All text/background pairs meet WCAG 2.2 AA contrast (4.5:1 normal, 3:1 large).
   - Focus indicators are thick, high-contrast and never removed.
   - Tap targets are at least 44x44 CSS px.
   - Respects prefers-reduced-motion, prefers-color-scheme and forced-colors.
   - Everything is in rem so browser text zoom works; there is also an in-app text size control.
   ========================================================================== */

:root {
  /* Brand */
  --teal: #02807e;        /* 4.78:1 on white  — large text / fills */
  --teal-deep: #006160;   /* 7.3:1 on white   — body-size text */
  --teal-tint: #e3f3f2;
  --orange: #f06828;      /* logo orange, decorative / large text on dark only */
  --orange-deep: #b8401d; /* 5.9:1 on white   — accent text */
  --orange-tint: #fdeee6;

  /* Surfaces & text */
  --bg: #ffffff;
  --bg-alt: #f5f8f8;
  --surface: #ffffff;
  --border: #c9d3d3;
  --text: #1f2a2a;        /* 15:1 */
  --text-muted: #4d5a5a;  /* 7.4:1 */
  --link: var(--teal-deep);

  /* Semantics */
  --success: #1b6e3a;     /* 6.2:1 on white */
  --success-tint: #e6f4ea;
  --danger: #b3261e;      /* 6.4:1 */
  --danger-tint: #fdecea;
  --focus: #1f2a2a;
  --focus-halo: #ffbf47;
  --played-bg: #e9ecec;
  --played-text: #4d5a5a;   /* 6.6:1 on played-bg */
  --played-border: #8a9797;

  --radius: 12px;
  --shadow: 0 1px 2px rgba(0,0,0,.06), 0 4px 16px rgba(0,0,0,.06);
  --font-body: "Roboto", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-head: "Poppins", var(--font-body);

  --scale: 1;
  color-scheme: light dark;
}

/* Dark mode: default when the OS asks for it, unless the page forces light. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --teal: #4fc3c0;
    --teal-deep: #7fd6d3;
    --teal-tint: #12302f;
    --orange: #f58a55;
    --orange-deep: #ffa778;
    --orange-tint: #3b2418;
    --bg: #101616;
    --bg-alt: #172020;
    --surface: #1c2626;
    --border: #3b4a4a;
    --text: #f1f5f5;
    --text-muted: #b9c6c6;
    --link: #9be0dd;
    --success: #7bd695;
    --success-tint: #17331f;
    --danger: #ff9b93;
    --danger-tint: #3d1a18;
    --focus: #ffffff;
    --focus-halo: #ffbf47;
    --played-bg: #0c1111;
    --played-text: #a9b6b6;
    --played-border: #566666;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 4px 16px rgba(0,0,0,.35);
  }
}
:root[data-theme="dark"] {
  --teal: #4fc3c0; --teal-deep: #7fd6d3; --teal-tint: #12302f;
  --orange: #f58a55; --orange-deep: #ffa778; --orange-tint: #3b2418;
  --bg: #101616; --bg-alt: #172020; --surface: #1c2626; --border: #3b4a4a;
  --text: #f1f5f5; --text-muted: #b9c6c6; --link: #9be0dd;
  --success: #7bd695; --success-tint: #17331f; --danger: #ff9b93; --danger-tint: #3d1a18;
  --focus: #ffffff; --focus-halo: #ffbf47;
  --played-bg: #0c1111; --played-text: #a9b6b6; --played-border: #566666;
}

/* Text size control */
:root[data-textsize="large"]  { --scale: 1.25; }
:root[data-textsize="xlarge"] { --scale: 1.5; }

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

html { font-size: calc(100% * var(--scale)); -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg-alt);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3 { font-family: var(--font-head); line-height: 1.2; margin: 0 0 .5em; letter-spacing: -0.01em; }
h1 { font-size: clamp(1.75rem, 1.2rem + 2vw, 2.5rem); font-weight: 700; }
h2 { font-size: 1.35rem; font-weight: 600; }
h3 { font-size: 1.15rem; font-weight: 600; }
p  { margin: 0 0 1em; max-width: 70ch; }
a  { color: var(--link); text-decoration: underline; text-underline-offset: .15em; }
a:hover { text-decoration-thickness: 2px; }
code { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: .95em; background: var(--teal-tint); padding: .05em .35em; border-radius: 4px; }
kbd  { font-family: inherit; border: 1px solid var(--border); border-bottom-width: 2px; border-radius: 6px; padding: .05em .45em; background: var(--surface); }
ul, ol { padding-left: 1.4em; }

.wrap { width: min(100% - 2rem, 72rem); margin-inline: auto; }
main { flex: 1; padding-block: 1.5rem 3rem; }
main:focus { outline: none; }

/* Focus: visible everywhere, 2-tone ring so it works on any background */
:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  box-shadow: 0 0 0 6px var(--focus-halo);
  border-radius: 6px;
}

.sr-only {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: 1rem; top: -4rem; z-index: 100;
  background: var(--surface); color: var(--text); padding: .75rem 1rem;
  border-radius: 0 0 var(--radius) var(--radius); box-shadow: var(--shadow);
  font-weight: 700; transition: top .15s;
}
.skip-link:focus { top: 0; }

[hidden] { display: none !important; }

/* --------------------------------------------------------------------------
   Header / footer
   -------------------------------------------------------------------------- */
.site-header { background: var(--surface); border-bottom: 4px solid var(--teal); }
.header-row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; padding-block: .75rem; }

.brand { display: inline-flex; align-items: center; gap: .75rem; text-decoration: none; color: inherit; min-height: 44px; border-radius: 8px; }
.brand-logo { display: block; height: 3.5rem; width: auto; max-width: min(60vw, 17rem); object-fit: contain; }
.brand-tag {
  font-family: var(--font-head); font-weight: 700; font-size: .95rem; letter-spacing: .14em; text-transform: uppercase;
  color: #fff; background: var(--teal); padding: .25rem .6rem; border-radius: 999px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .brand-tag { color: #0b1514; }
}
:root[data-theme="dark"] .brand-tag { color: #0b1514; }

.header-tools { display: flex; align-items: center; gap: .5rem; flex-wrap: wrap; }
.text-size { display: inline-flex; gap: .25rem; }

.site-footer { background: var(--surface); border-top: 1px solid var(--border); padding-block: 1.25rem; font-size: .95rem; color: var(--text-muted); }
.site-footer p { margin-bottom: .4em; }

/* --------------------------------------------------------------------------
   Buttons — all at least 44px tall
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  min-height: 44px; min-width: 44px; padding: .6rem 1.15rem;
  font: inherit; font-weight: 600; font-family: var(--font-head);
  border-radius: var(--radius); border: 2px solid transparent; cursor: pointer;
  text-decoration: none; line-height: 1.2; text-align: center;
  transition: background-color .15s, color .15s, border-color .15s, transform .05s;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--teal); color: #fff; border-color: var(--teal); }
.btn-primary:hover { background: var(--teal-deep); border-color: var(--teal-deep); }
.btn-secondary { background: var(--surface); color: var(--teal-deep); border-color: var(--teal); }
.btn-secondary:hover { background: var(--teal-tint); }
.btn-ghost { background: transparent; color: var(--teal-deep); border-color: transparent; text-decoration: underline; text-underline-offset: .2em; }
.btn-ghost:hover { background: var(--teal-tint); }
.btn-ghost[aria-pressed="true"] { background: var(--teal); color: #fff; text-decoration: none; }
.btn-reset { background: transparent; color: var(--orange-deep); border-color: var(--orange-deep); }
.btn-reset:hover { background: var(--orange-tint); }
.btn-large { font-size: 1.15rem; padding: .8rem 1.6rem; }
.btn-small { font-size: .9rem; padding: .4rem .8rem; }
.btn[disabled], .btn[aria-disabled="true"] { opacity: .55; cursor: wait; }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .btn-primary { color: #0b1514; }
  :root:not([data-theme="light"]) .btn-ghost[aria-pressed="true"] { color: #0b1514; }
}
:root[data-theme="dark"] .btn-primary, :root[data-theme="dark"] .btn-ghost[aria-pressed="true"] { color: #0b1514; }

.actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.25rem; align-items: center; }
.actions-stack { flex-direction: column; align-items: stretch; }
.actions-inline { margin-top: .75rem; }

/* --------------------------------------------------------------------------
   Layout pieces
   -------------------------------------------------------------------------- */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem; box-shadow: var(--shadow); }
.page-title { margin-bottom: .35em; }
.page-title:focus { outline: none; }
.lead { font-size: 1.2rem; color: var(--text-muted); }
.hint { color: var(--text-muted); font-size: .95rem; }
.eyebrow { font-family: var(--font-head); font-weight: 600; text-transform: uppercase; letter-spacing: .1em; font-size: .85rem; color: var(--orange-deep); margin-bottom: .5rem; }
.screen-head { margin-bottom: 1rem; }
.back-link { padding-left: .5rem; margin-bottom: .5rem; }

/* Setup form */
.setup-form { margin-top: 1rem; }
.actions-start { margin-top: 0; }
.field { border: 0; padding: 0; margin: 0 0 1.5rem; min-width: 0; }
.field legend { font-family: var(--font-head); font-weight: 600; font-size: 1.15rem; padding: 0; margin-bottom: .25rem; }
.radio-row { display: flex; flex-wrap: wrap; gap: .5rem; }
.chip {
  display: inline-flex; align-items: center; gap: .5rem; min-height: 44px; padding: .4rem .9rem;
  border: 2px solid var(--border); border-radius: 999px; background: var(--surface); cursor: pointer; font-weight: 500;
}
.chip:has(input:checked) { border-color: var(--teal); background: var(--teal-tint); color: var(--teal-deep); font-weight: 700; }
.chip:has(input:focus-visible) { outline: 3px solid var(--focus); outline-offset: 2px; box-shadow: 0 0 0 6px var(--focus-halo); }
.chip input { width: 1.25rem; height: 1.25rem; margin: 0; accent-color: var(--teal); }
  display: block; width: 100%; margin-top: .25rem; min-height: 44px; padding: .5rem .75rem; font: inherit;
  border: 2px solid var(--border); border-radius: 8px; background: var(--surface); color: var(--text);
}

/* Board: dice roller */
.roller { display: flex; flex-direction: column; align-items: center; text-align: center; padding: 1.75rem 1.25rem; margin-bottom: 1.75rem; border-top: 8px solid var(--orange); }
.die svg { display: block; width: 6rem; height: 6rem; }
.die-face { fill: var(--surface); stroke: var(--teal); stroke-width: 6; }
.die-pips circle { fill: var(--orange-deep); }
.die.rolling svg { animation: die-roll .5s linear infinite; }
@keyframes die-roll {
  0%   { transform: rotate(0deg) scale(1); }
  25%  { transform: rotate(90deg) scale(1.08); }
  50%  { transform: rotate(180deg) scale(1); }
  75%  { transform: rotate(270deg) scale(1.08); }
  100% { transform: rotate(360deg) scale(1); }
}
.roll-result { font-family: var(--font-head); font-weight: 600; font-size: clamp(1.35rem, 1rem + 1.5vw, 2rem); color: var(--teal-deep); min-height: 2.6em; display: flex; align-items: center; justify-content: center; margin: 1rem 0 0; max-width: none; }
.roll-result.landed { color: var(--orange-deep); }
.roll-result.rolling { color: var(--text-muted); }
.actions-center { justify-content: center; }
.roller.landed .actions-center { flex-direction: column; gap: .35rem; }
.roller.landed #btn-roll-go { font-size: 1.35rem; padding: .9rem 2.2rem; }
.roll-again { font-size: 1rem; font-weight: 500; }
.actions-end { justify-content: flex-end; margin-top: 1rem; }

/* Collapsed manual category picker */
.manual { border: 2px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.manual-summary {
  cursor: pointer; list-style: none; display: flex; align-items: center; gap: .6rem; min-height: 44px;
  padding: .7rem 1rem; font-family: var(--font-head); font-weight: 600; color: var(--teal-deep); border-radius: var(--radius);
}
.manual-summary::-webkit-details-marker { display: none; }
.manual-summary::before { content: ""; width: .6em; height: .6em; border-right: 3px solid currentColor; border-bottom: 3px solid currentColor; transform: rotate(-45deg); transition: transform .15s; flex-shrink: 0; margin-left: .2em; }
.manual[open] .manual-summary::before { transform: rotate(45deg); }
.manual-summary:hover { background: var(--teal-tint); }
.manual[open] .manual-summary { border-bottom: 1px solid var(--border); border-radius: var(--radius) var(--radius) 0 0; }
.manual-body { padding: 1rem; }

/* Board */
.category-grid { display: grid; gap: .9rem; grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr)); }
.category-card {
  display: flex; flex-direction: column; align-items: flex-start; gap: .35rem; width: 100%; min-height: 6rem;
  padding: 1rem 1.15rem; text-align: left; font: inherit; color: var(--text); cursor: pointer;
  background: var(--surface); border: 2px solid var(--border); border-left: 8px solid var(--teal); border-radius: var(--radius); box-shadow: var(--shadow);
  transition: border-color .15s, background-color .15s;
}
.category-card:hover { border-color: var(--teal); background: var(--teal-tint); }
.category-card .name { font-family: var(--font-head); font-weight: 700; font-size: 1.2rem; color: var(--teal-deep); }
.category-card .meta { color: var(--text-muted); font-size: .95rem; }
.category-card.done { border-left-color: var(--played-border); border-style: dashed; background: var(--played-bg); box-shadow: none; }
.category-card.done .name { color: var(--played-text); }
.category-card.done .meta::before { content: "✓ "; }

/* Results */
.summary-list { list-style: none; padding: 0; margin: 0; display: grid; gap: .35rem; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); }
.summary-list li { padding: .35rem 0; }

/* Tiles */
.tile-grid { display: grid; gap: .75rem; grid-template-columns: repeat(auto-fill, minmax(5.5rem, 1fr)); }
.tile {
  min-height: 5.5rem; font: inherit; font-family: var(--font-head); font-weight: 700; font-size: 1.75rem;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: .15rem;
  background: var(--teal); color: #fff; border: 2px solid var(--teal); border-radius: var(--radius); cursor: pointer; box-shadow: var(--shadow);
}
.tile:hover { background: var(--teal-deep); }
.tile .label { font-size: .8rem; font-weight: 600; letter-spacing: .05em; text-transform: uppercase; font-family: var(--font-body); }
/* Played tiles: unmistakably different — muted fill, dashed outline, checkmark, "Played" label */
.tile.used {
  background: var(--played-bg); color: var(--played-text); border: 3px dashed var(--played-border);
  box-shadow: none; cursor: default; font-size: 1.35rem;
}
.tile.used .num { opacity: .85; }
.tile.used .label { color: var(--played-text); }
.tile.used:hover { background: var(--played-bg); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .tile:not(.used) { color: #0b1514; } }
:root[data-theme="dark"] .tile:not(.used) { color: #0b1514; }

/* Question screen */
.question-main { max-width: 56rem; }
.question-text { font-size: clamp(1.5rem, 1.1rem + 1.8vw, 2.25rem); font-weight: 600; max-width: 32ch; margin-bottom: 1rem; }

.options { display: grid; gap: .75rem; grid-template-columns: 1fr; margin-top: 1rem; }
@media (min-width: 44rem) { .options { grid-template-columns: 1fr 1fr; } }
.option {
  display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: .9rem; width: 100%; min-height: 4rem;
  padding: .9rem 1rem; text-align: left; font: inherit; font-size: 1.15rem; color: var(--text);
  background: var(--surface); border: 2px solid var(--border); border-radius: var(--radius); cursor: pointer; box-shadow: var(--shadow);
  transition: border-color .15s, background-color .15s;
}
.option:hover { border-color: var(--teal); background: var(--teal-tint); }
.option .letter {
  display: inline-flex; align-items: center; justify-content: center; width: 2.5rem; height: 2.5rem; border-radius: 50%;
  background: var(--teal-tint); color: var(--teal-deep); font-family: var(--font-head); font-weight: 700; font-size: 1.15rem; flex-shrink: 0;
}
.option .status { font-weight: 700; font-size: .95rem; white-space: nowrap; }
.option[aria-pressed="true"] { border-color: var(--teal-deep); background: var(--teal-tint); }
.option.correct { border-color: var(--success); background: var(--success-tint); }
.option.correct .letter { background: var(--success); color: #fff; }
.option.correct .status { color: var(--success); }
.option.wrong { border-color: var(--danger); background: var(--danger-tint); }
.option.wrong .letter { background: var(--danger); color: #fff; }
.option.wrong .status { color: var(--danger); }
.option.revealed:not(.correct):not(.wrong) { opacity: .7; }
.option[disabled] { cursor: default; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .option.correct .letter, :root:not([data-theme="light"]) .option.wrong .letter { color: #0b1514; }
}
:root[data-theme="dark"] .option.correct .letter, :root[data-theme="dark"] .option.wrong .letter { color: #0b1514; }

.reveal { margin-top: 1.25rem; border-left: 8px solid var(--success); }
.reveal-text { font-size: 1.2rem; font-weight: 600; margin-bottom: 0; }

/* Celebration confetti overlay */
.celebrate { position: fixed; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: 50; }
.reveal.is-correct { border-left-color: var(--orange); }
.reveal.is-correct .reveal-text { color: var(--success); }

/* Dialogs */
.dialog { border: 0; border-radius: var(--radius); padding: 0; max-width: min(92vw, 36rem); width: 100%; background: var(--surface); color: var(--text); box-shadow: 0 20px 60px rgba(0,0,0,.35); }
.dialog::backdrop { background: rgba(0,0,0,.55); }
.dialog form { padding: 1.5rem; }
.dialog h2 { margin-top: 0; }
.shortcut-list li { margin-bottom: .35em; }

/* --------------------------------------------------------------------------
   Motion, forced colours, print
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}

@media (forced-colors: active) {
  .btn, .option, .tile, .category-card, .chip, .card { border: 2px solid ButtonText; box-shadow: none; }
  .btn-primary, .tile:not(.used) { forced-color-adjust: none; background: ButtonText; color: Canvas; }
  .option.correct { outline: 4px double Highlight; }
  .option.wrong  { outline: 4px dashed ButtonText; }
  .tile.used, .category-card.done { forced-color-adjust: none; background: Canvas; color: GrayText; border: 3px dashed GrayText; }
}

@media print {
  .site-header, .site-footer, .actions { display: none !important; }
}