/* Bauhaus by way of brutalism: a paper ground, heavy rules, blocks of flat
   colour instead of shading, geometric type, and no rounded corners anywhere.
   Two palettes — the roles stay the same, only the values swap. */
:root {
  --paper: #edeae1; /* the ground */
  --paper-2: #e2ded3; /* a panel raised off it */
  --ink: #1d1c19; /* type and rules */
  --dim: #6f6a61;
  --ghost: #8d887e;
  --red: #ab5340; /* terracotta, not pillar box */
  --blue: #46617a; /* slate, not ultramarine */
  --yellow: #c2a04e; /* ochre, not lemon */
  --hairline: rgba(29, 28, 25, 0.18);
  --band: rgba(194, 160, 78, 0.3);
  --shadow: rgba(29, 28, 25, 0.9);

  --rule: 3px solid var(--ink);
  --hair: 1px solid var(--hairline);

  --ih: 46px; /* one row in a column */
  --reel-rows: 9;
  --pad: clamp(14px, 2.4vw, 28px);

  /* Futura where it exists, which is most Macs; a geometric stand-in elsewhere. */
  --sans: Futura, "Century Gothic", "URW Gothic", "Avenir Next", ui-sans-serif, system-ui, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;

  color-scheme: light;
}

/* The system preference, unless the reader has chosen otherwise. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #15151a;
    --paper-2: #1d1d23;
    --ink: #e9e6dd;
    --dim: #8b867c;
    --ghost: #55524c;
    --red: #cd7357;
    --blue: #7fa6c6;
    --yellow: #cfa955;
    --hairline: rgba(233, 230, 221, 0.16);
    --band: rgba(207, 169, 85, 0.16);
    --shadow: rgba(0, 0, 0, 0.85);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --paper: #15151a;
  --paper-2: #1d1d23;
  --ink: #e9e6dd;
  --dim: #8b867c;
  --ghost: #55524c;
  --red: #cd7357;
  --blue: #7fa6c6;
  --yellow: #cfa955;
  --hairline: rgba(233, 230, 221, 0.16);
  --band: rgba(207, 169, 85, 0.16);
  --shadow: rgba(0, 0, 0, 0.85);
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body { height: 100%; margin: 0; }

body {
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.6 var(--sans);
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  height: 100dvh;
  overflow: hidden;
  -webkit-text-size-adjust: 100%;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

/* Bayer's alphabet was lowercase; the labels here follow. */
.labels,
.forms dt,
.card h3,
.prompt {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--dim);
}

/* ---- header ---- */
header {
  display: flex;
  align-items: center;
  gap: var(--pad);
  padding: 12px var(--pad);
  border-bottom: var(--rule);
}

h1 {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-transform: lowercase;
  white-space: nowrap;
}

/* Circle, triangle, square — red, yellow, blue. The whole school in 40px. */
.marks {
  display: flex;
  align-items: center;
  gap: 5px;
}

.marks i {
  display: block;
  width: 13px;
  height: 13px;
}

.circle { background: var(--red); border-radius: 50%; }
.square { background: var(--blue); }

.triangle {
  background: none;
  border-left: 6.5px solid transparent;
  border-right: 6.5px solid transparent;
  border-bottom: 13px solid var(--yellow);
  height: 0 !important;
}

.count {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0;
  font-weight: 400;
  color: var(--dim);
  align-self: flex-end;
  padding-bottom: 4px;
}

.find {
  position: relative;
  flex: 1 1 auto;
  max-width: 420px;
  margin-inline: auto;
}

#q {
  width: 100%;
  font: inherit;
  font-size: 15px;
  color: var(--ink);
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: 0;
  padding: 8px 12px;
  -webkit-appearance: none;
  appearance: none;
}

#q::placeholder { color: var(--dim); }
#q:focus { outline: none; border-color: var(--red); }

#hits {
  position: absolute;
  z-index: 5;
  inset-inline: 0;
  top: calc(100% + 6px);
  margin: 0;
  padding: 0;
  list-style: none;
  max-height: 60vh;
  overflow-y: auto;
  background: var(--paper);
  border: var(--rule);
  box-shadow: 5px 5px 0 var(--shadow);
}

#hits li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 9px 12px;
  border-bottom: var(--hair);
  cursor: pointer;
}

#hits li:last-child { border-bottom: none; }
#hits li:hover,
#hits li.on { background: var(--paper-2); }
#hits b { color: var(--red); font-weight: 500; }
#hits li:hover b { color: var(--ink); }

#hits span {
  color: var(--dim);
  font-size: 13px;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

#hits li:hover span { color: var(--ink); }

.theme {
  font: inherit;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: lowercase;
  color: var(--dim);
  background: none;
  border: var(--hair);
  padding: 5px 12px;
  cursor: pointer;
  touch-action: manipulation;
}

.theme:hover { color: var(--ink); border-color: var(--ink); }

/* One focus treatment for everything that takes focus. */
a:focus-visible,
button:focus-visible,
.reel:focus-visible {
  outline: 3px solid var(--red);
  outline-offset: 2px;
}

.contrib {
  color: var(--dim);
  font-size: 13px;
  text-decoration: none;
  box-shadow: inset 0 -6px 0 var(--yellow);
  white-space: nowrap;
}

.contrib:hover { color: var(--ink); }

/* ---- layout ---- */
main {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.2fr);
  grid-template-rows: minmax(0, 1fr);
  min-height: 0;
}

/* ---- the two columns ---- */
/* Browsing, they are plain scrolling lists side by side, the way the terminal
   version draws its panes. Testing, the same markup becomes a slot machine. */
.machine {
  display: flex;
  flex-direction: column;
  min-height: 0;
  align-self: stretch;
  border-right: var(--rule);
  background: var(--paper-2);
}

.labels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 12px 0;
  border-bottom: var(--rule);
}

/* The same inset as a row, so a label sits over its own column. */
.labels span { padding: 0 var(--pad); }

.reels {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: minmax(0, 1fr);
  min-height: 0;
  flex: 1;
}

.reel {
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  touch-action: pan-y;
  outline: none;
}

#prefix { border-right: var(--rule); }
.reel:focus-visible { outline-offset: -3px; }

.item {
  height: var(--ih);
  display: flex;
  align-items: center;
  padding: 0 var(--pad);
  font-size: 17px;
  color: var(--ink);
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
  white-space: nowrap;
}

/* A border would change the row height, which the reel arithmetic counts on. */
.item + .item { box-shadow: inset 0 1px 0 var(--hairline); }
.item:hover { background: var(--paper-2); }
.item.ghost { color: var(--ghost); font-style: italic; }

/* The selection is a block of colour, not a highlight. */
.item.on { font-weight: 500; color: var(--paper); }
.item.on:hover { filter: brightness(1.08); }
#prefix .item.on { background: var(--red); }
#stem .item.on { background: var(--blue); }

/* The lit band a reel comes to rest in. Only the slot machine has one. */
.window { display: none; }

/* ---- the same columns, as a one-armed bandit ---- */
body.testing .machine { align-self: center; border-right: none; background: none; }
body.testing .labels { border-bottom: none; padding-bottom: 6px; }

body.testing .reels {
  flex: none; /* a flex-basis of 0 would beat the height below */
  height: min(calc(var(--ih) * var(--reel-rows)), calc(100dvh - 240px));
  border-block: var(--rule);
  background: var(--paper-2);
}

body.testing .reel {
  position: relative;
  z-index: 1; /* the lit band is painted behind the rows, not over them */
  overflow: hidden;
  border-right: none;
  touch-action: none;
  cursor: grab;
  -webkit-mask-image: linear-gradient(transparent, #000 26%, #000 74%, transparent);
  mask-image: linear-gradient(transparent, #000 26%, #000 74%, transparent);
}

body.testing .reel:active { cursor: grabbing; }
body.testing .strip { will-change: transform; }

body.testing .item {
  justify-content: center;
  padding: 0;
  background: none;
  box-shadow: none;
}

/* The lit band is the block here, so the landed word only needs its colour. */
body.testing #prefix .item.on { background: none; color: var(--red); }
body.testing #stem .item.on { background: none; color: var(--blue); }

body.testing .window {
  display: block;
  position: absolute;
  z-index: 0;
  inset-inline: 0;
  top: 50%;
  height: var(--ih);
  transform: translateY(-50%);
  background: var(--band);
  border-block: var(--rule);
  pointer-events: none;
}

/* ---- the card ---- */
.card {
  min-width: 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: clamp(24px, 4vw, 56px) clamp(20px, 4vw, 60px);
}

.word {
  font-size: clamp(38px, 5.6vw, 66px);
  line-height: 0.96;
  margin: 0;
  font-weight: 500;
  letter-spacing: -0.03em;
  text-transform: lowercase;
  overflow-wrap: anywhere;
}

.word b { color: var(--red); font-weight: 700; }

.gloss {
  margin: 16px 0 0;
  font-size: clamp(17px, 1.7vw, 20px);
  font-weight: 400;
  line-height: 1.4;
  color: var(--blue);
  max-width: 34ch;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.02em;
}

.badges li {
  padding: 3px 9px;
  border: var(--hair);
  color: var(--dim);
}

.badges .sep { border-color: var(--ink); color: var(--ink); }
.badges .insep { border-color: var(--red); color: var(--red); }
.badges .bare { border-color: var(--blue); color: var(--blue); }

.forms {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  gap: 10px 28px;
  margin: 30px 0 0;
  padding: 26px 0 0;
  border-top: var(--rule);
}

.forms dt { padding-top: 4px; }

.forms dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.card h3 { margin: 36px 0 10px; }

.colloquial { margin: 0; max-width: 58ch; }

blockquote {
  margin: 28px 0 0;
  padding: 14px 20px;
  border-left: 6px solid var(--yellow);
  background: var(--paper-2);
  max-width: 62ch;
}

blockquote p { margin: 0; font-size: clamp(16px, 1.5vw, 18px); line-height: 1.5; }
blockquote .en { margin-top: 6px; color: var(--dim); font-size: 14px; }

/* Test mode: the word is the question, everything else waits. */
body.testing:not(.revealed) .answer { display: none; }

body.testing:not(.revealed) .card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  gap: clamp(30px, 7vh, 64px);
}

body.testing:not(.revealed) .word { font-size: clamp(40px, 7vw, 78px); }

.prompt { display: none; }
body.testing:not(.revealed) .prompt { display: block; margin: 0; }

/* ---- footer ---- */
footer {
  display: flex;
  border-top: var(--rule);
}

footer button,
.reveal {
  font: inherit;
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: lowercase;
  color: var(--ink);
  background: var(--paper);
  border: none;
  border-right: var(--rule);
  border-radius: 0;
  flex: 1;
  padding: 0 24px;
  min-height: 54px;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

footer button:last-child { border-right: none; }
footer button:hover { background: var(--paper-2); }
footer button[aria-pressed="true"] { background: var(--red); color: var(--paper); font-weight: 500; }
footer button[aria-pressed="true"] kbd { color: var(--paper); }

.primary { background: var(--ink); color: var(--paper); font-weight: 500; }
.primary:hover { background: var(--red); }
.primary kbd { color: var(--paper); }

/* The reveal button stands alone on the card, so it carries its own frame. */
.reveal {
  flex: none; /* the footer buttons stretch; this one does not */
  min-width: 260px;
  padding: 0 32px;
  color: var(--ink);
  background: none;
  border: var(--rule);
  box-shadow: 5px 5px 0 var(--ink);
}

.reveal kbd { color: var(--dim); }
.reveal:hover { background: var(--ink); color: var(--paper); box-shadow: 2px 2px 0 var(--ink); }

kbd {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--dim);
  margin-left: 8px;
}

/* ---- narrow ---- */
@media (max-width: 860px) {
  :root { --ih: 44px; --reel-rows: 5; }

  main { grid-template-columns: minmax(0, 1fr); grid-template-rows: auto minmax(0, 1fr); }
  header { flex-wrap: wrap; gap: 12px; }
  h1 { flex: 1; }
  .find { order: 3; flex-basis: 100%; max-width: none; margin: 0; }

  .machine { align-self: start; border-right: none; border-bottom: var(--rule); }
  .reels { height: calc(var(--ih) * var(--reel-rows)); flex: none; }
  body.testing .machine { border-bottom: none; }

  footer button { padding: 0 8px; }
}

@media (max-width: 560px) {
  kbd { display: none; }
}

/* Short screens: give the columns fewer rows so the card keeps its room. */
@media (max-height: 720px) {
  :root { --reel-rows: 4; }
}

@media (max-height: 560px) {
  :root { --reel-rows: 3; --ih: 40px; }
}

@media (prefers-reduced-motion: reduce) {
  .strip { transition: none; }
}