/* Tashkeel Compare - static Space
   Palette and type are drawn from the subject: the marks themselves.
   Lapis and saffron are the ink and the illumination of an Arabic manuscript;
   the page keeps them quiet except where a mark DISAGREES, which is the one
   thing a reader needs to see.

   The sheet is written with logical properties (inline-start/end rather than
   left/right) so the Arabic edition mirrors without a second stylesheet. The
   few places where a physical direction is genuinely meant - the box-shadow
   inset stripe, which has no logical form - are flipped explicitly under
   [dir="rtl"]. */

:root {
  /* The page is a light sheet even when the OS asks for dark: without this,
     every native control (checkbox, slider, file input, scrollbar) would be
     drawn in dark UA styling on top of a paper-white page. */
  color-scheme: light;

  --ink:        #16192e;
  --ink-2:      #3a3e55;
  --muted:      #62657a;
  --lapis:      #23307a;
  --lapis-2:    #3b4aa8;
  /* Saffron is the illumination colour. Its bright form (#c98a16) is only
     2.95:1 on white, so text and marks use the darker --saffron-ink, which is
     5.81:1 on white and 5.13:1 on --saffron-bg. */
  --saffron-ink: #8a5c07;
  --saffron-bg: #fbf0d6;
  --paper:      #fcfbf8;
  --paper-2:    #f4f2ec;
  --rule:       #e1ded4;
  --rule-2:     #cfcabc;
  --warn:       #9a3412;

  --display: "Fraunces", Georgia, "Times New Roman", serif;
  --ui: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --ar: "Amiri", "Noto Sans Arabic", "Traditional Arabic", "Times New Roman", serif;

  --measure: 1180px;
  --r: 3px;
}

/* In Arabic the same two roles are filled by Arabic faces: Amiri is a naskh
   with real display weight, and Noto Sans Arabic is the UI face that keeps
   small text legible where a naskh would clot. */
html[lang="ar"] {
  --display: "Amiri", "Noto Sans Arabic", "Traditional Arabic", serif;
  --ui: "Noto Sans Arabic", "IBM Plex Sans", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--ui);
  font-size: 15px;
  line-height: 1.55;
  font-feature-settings: "tnum" 1;
}

/* Arabic is a joined script: letter-spacing breaks the joins and uppercase is
   meaningless, so every tracking rule is undone and the size is raised to
   compensate for the loss of the capitals' visual weight. */
html[lang="ar"] .eyebrow,
html[lang="ar"] .field-label,
html[lang="ar"] .mast-facts dt,
html[lang="ar"] thead th,
html[lang="ar"] .badge,
html[lang="ar"] .model-picker .mk-tag {
  letter-spacing: 0;
  text-transform: none;
  font-size: 11.5px;
}
html[lang="ar"] .eyebrow { font-size: 13px; }
html[lang="ar"] h1 { letter-spacing: 0; line-height: 1.14; }
html[lang="ar"] .board-block h2 { letter-spacing: 0; }

/* ------------------------------------------------------------- masthead */

.masthead {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 56px 24px 30px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 40px;
  align-items: end;
  border-bottom: 2px solid var(--ink);
}

.eyebrow {
  margin: 0 0 14px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--lapis);
}

h1 {
  margin: 0;
  font-family: var(--display);
  font-weight: 900;
  font-variation-settings: "opsz" 120, "SOFT" 30;
  font-size: clamp(2.6rem, 6.4vw, 4.4rem);
  line-height: .94;
  letter-spacing: -.02em;
}

h1 em { font-style: italic; font-weight: 500; color: var(--lapis); }

.lede {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: 1.02rem;
  color: var(--ink-2);
}
html[lang="ar"] .lede { max-width: 54ch; }

.mast-side { display: flex; flex-direction: column; align-items: flex-end; gap: 18px; }

.lang-switch {
  display: inline-flex;
  border: 1px solid var(--rule-2);
  border-radius: var(--r);
  overflow: hidden;
  background: #fff;
}
.lang-switch button {
  appearance: none; border: 0; background: none; font: inherit;
  font-size: 12px; font-weight: 500; color: var(--ink-2);
  padding: 5px 13px; cursor: pointer;
}
.lang-switch button + button { border-inline-start: 1px solid var(--rule-2); }
.lang-switch button[data-lang="ar"] { font-family: "Noto Sans Arabic", "Amiri", sans-serif; font-size: 13.5px; }
.lang-switch button:hover:not([aria-pressed="true"]) { color: var(--lapis); }
.lang-switch button[aria-pressed="true"] { background: var(--lapis); color: #fff; font-weight: 600; }
.lang-switch button:focus-visible { outline: 2px solid var(--lapis-2); outline-offset: -2px; }

.mast-facts { margin: 0; display: flex; gap: 30px; }
.mast-facts div { text-align: end; }
.mast-facts dt {
  font-size: 10px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--muted); font-weight: 600;
}
.mast-facts dd {
  margin: 3px 0 0;
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--lapis);
}

/* ----------------------------------------------------------------- tabs */

.tabs {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  gap: 4px;
  overflow-x: auto;
}

.tabs button {
  appearance: none;
  background: none;
  border: 0;
  border-bottom: 3px solid transparent;
  padding: 16px 16px 13px;
  font: inherit;
  font-weight: 500;
  color: var(--muted);
  cursor: pointer;
  white-space: nowrap;
}
.tabs button:hover { color: var(--ink); }
.tabs button[aria-selected="true"] {
  color: var(--ink);
  border-bottom-color: var(--saffron-ink);
  font-weight: 600;
}

/* ---------------------------------------------------------------- panel */

main { max-width: var(--measure); margin: 0 auto; padding: 0 24px 40px; }

.panel { padding: 34px 0 10px; }

.work { display: flex; flex-direction: column; gap: 16px; }

.row { display: flex; gap: 16px; }
.grow { flex: 1 1 auto; min-width: 0; }

.field { display: flex; flex-direction: column; gap: 7px; }
.field.tight { min-width: 190px; }
.field-label {
  font-size: 10px; font-weight: 600; letter-spacing: .14em;
  text-transform: uppercase; color: var(--muted);
}
.field-label output { color: var(--lapis); font-weight: 600; }

textarea, input[type="file"], input[type="range"] {
  font: inherit;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--rule-2);
  border-radius: var(--r);
  padding: 12px 14px;
}

textarea { resize: vertical; line-height: 2.05; }
textarea[dir="rtl"] { font-family: var(--ar); font-size: 1.32rem; }

textarea:focus-visible, input:focus-visible, button:focus-visible, .sample:focus-visible {
  outline: 2px solid var(--lapis-2);
  outline-offset: 2px;
}

.samples { display: flex; flex-wrap: wrap; gap: 7px; }
.sample {
  font: inherit; font-size: 12.5px;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: 100px;
  padding: 5px 13px;
  color: var(--ink-2);
  cursor: pointer;
}
.sample:hover { border-color: var(--lapis-2); color: var(--lapis); }

.controls { display: flex; gap: 14px; align-items: flex-end; }
.controls.wrap { flex-wrap: wrap; }

.model-picker { display: flex; flex-wrap: wrap; gap: 8px; flex: 1 1 auto; }
.model-picker label {
  display: inline-flex; align-items: center; gap: 7px;
  border: 1px solid var(--rule-2);
  border-radius: var(--r);
  padding: 8px 12px;
  font-size: 13px;
  cursor: pointer;
  background: #fff;
}
.model-picker label:has(input:checked) {
  border-color: var(--lapis);
  box-shadow: inset 3px 0 0 var(--lapis);
}
html[dir="rtl"] .model-picker label:has(input:checked) { box-shadow: inset -3px 0 0 var(--lapis); }
.model-picker .mk-tag {
  font-size: 10px; letter-spacing: .08em; text-transform: uppercase;
  color: var(--muted);
}
.model-picker label:has(input:checked) .mk-tag { color: var(--lapis); }

.switch { display: inline-flex; align-items: center; gap: 9px; font-size: 13.5px; }
.switch small { color: var(--muted); }

.go {
  appearance: none; border: 0; border-radius: var(--r);
  background: var(--lapis); color: #fff;
  font: inherit; font-weight: 600; font-size: 14px;
  padding: 11px 22px; cursor: pointer;
}
.go:hover { background: var(--lapis-2); }
.go:disabled { background: var(--rule-2); cursor: progress; }

.ghost {
  appearance: none; background: none; font: inherit; font-size: 13px;
  border: 1px solid var(--rule-2); border-radius: var(--r);
  padding: 8px 15px; cursor: pointer; color: var(--ink-2);
}
.ghost:hover:not(:disabled) { border-color: var(--lapis); color: var(--lapis); }
.ghost:disabled { opacity: .45; cursor: default; }

.hint { margin: 0; font-size: 12.5px; color: var(--muted); }
.hint.warn { color: var(--warn); }

.report {
  font-size: 12.5px; color: var(--ink-2);
  background: var(--paper-2);
  border-inline-start: 3px solid var(--lapis);
  padding: 12px 15px;
  border-start-end-radius: var(--r);
  border-end-end-radius: var(--r);
}
.report:empty { display: none; }
.report div + div { margin-top: 3px; }

/* -------------------------------------------------------------- results */

.results { display: grid; gap: 16px; margin-top: 28px; }
.results:empty { margin: 0; }

.card {
  border: 1px solid var(--rule-2);
  border-radius: var(--r);
  background: #fff;
  overflow: hidden;
}
.card.ours { border-color: var(--lapis); }
.card.ours .card-head { box-shadow: inset 4px 0 0 var(--lapis); }
html[dir="rtl"] .card.ours .card-head { box-shadow: inset -4px 0 0 var(--lapis); }
.card.precomputed { background: var(--paper-2); }

.card-head {
  display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap;
  padding: 12px 16px;
  border-bottom: 1px solid var(--rule);
}
.card-name { font-weight: 600; font-size: 14px; }
.card-name .ar { font-family: var(--ui); }

.badge {
  font-size: 10px; font-weight: 600; letter-spacing: .09em;
  text-transform: uppercase; border-radius: 100px; padding: 3px 9px;
  border: 1px solid currentColor;
}
.badge.ours { color: var(--lapis); }
.badge.pre { color: var(--muted); }
.badge.slow { color: var(--saffron-ink); }
.badge.order { color: var(--saffron-ink); }

.card-stats { margin-inline-start: auto; font-size: 11.5px; color: var(--muted); }
.card-stats b { font-weight: 600; color: var(--ink-2); }

.card-out {
  direction: rtl; text-align: start;
  font-family: var(--ar); font-size: 1.55rem; line-height: 2.35;
  padding: 16px 18px;
  word-break: break-word;
  min-height: 3.4rem;
}
.card-out.diffed .d {
  background: var(--saffron-bg);
  box-shadow: inset 0 -2px 0 var(--saffron-ink);
  border-radius: 2px;
}
.card-out .err {
  color: var(--warn); font-family: var(--ui); font-size: .8rem;
  direction: ltr; text-align: start;
}
html[dir="rtl"] .card-out .err { direction: rtl; }

.card-foot {
  border-top: 1px solid var(--rule);
  padding: 9px 16px;
  font-size: 11.5px; color: var(--muted);
}

/* disagreement summary strip */
.disagree {
  display: flex; align-items: center; gap: 12px;
  margin: 22px 0 0; padding: 12px 16px;
  border: 1px dashed var(--rule-2); border-radius: var(--r);
  font-size: 13px; color: var(--ink-2);
}
.disagree .key {
  display: inline-block; width: 13px; height: 13px; border-radius: 2px;
  background: var(--saffron-bg); box-shadow: inset 0 -2px 0 var(--saffron-ink);
}

/* ---------------------------------------------------------------- table */

table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
caption { text-align: start; font-size: 12.5px; color: var(--muted); padding-bottom: 10px; }
th, td { padding: 9px 10px; border-bottom: 1px solid var(--rule); text-align: end; }
th:first-child, td:first-child { text-align: start; }
thead th {
  font-size: 10px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--muted); border-bottom: 2px solid var(--ink); font-weight: 600;
}
tbody tr.ours { background: var(--saffron-bg); }
tbody tr.ours td { font-weight: 600; }
td.num, th.num { font-variant-numeric: tabular-nums; }
td.zero { color: var(--muted); }

.board-block { margin-bottom: 44px; }
.board-block h2 {
  font-family: var(--display); font-weight: 700; font-size: 1.5rem;
  margin: 0 0 4px; letter-spacing: -.01em;
}
.board-block p.note { margin: 0 0 18px; font-size: 13px; color: var(--muted); max-width: 76ch; }

.scatter { width: 100%; height: auto; border: 1px solid var(--rule); border-radius: var(--r); background: #fff; }
.scatter text { font-family: var(--ui); font-size: 10px; fill: var(--muted); }
.scatter .pt-ours { fill: var(--saffron-ink); }
.scatter .pt-quoted { fill: var(--lapis); opacity: .62; }
.scatter .grid { stroke: var(--rule); stroke-width: 1; }
.scatter .axis { stroke: var(--ink); stroke-width: 1.5; }

/* -------------------------------------------------------------- colophon */

.colophon {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 34px 24px 70px;
  border-top: 1px solid var(--rule);
}
.colophon h2 {
  font-family: var(--display); font-size: 1.15rem; font-weight: 700; margin: 0 0 14px;
}
.colophon ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 9px; max-width: 88ch; }
.colophon li { font-size: 13px; color: var(--ink-2); padding-inline-start: 18px; position: relative; }
.colophon li::before {
  content: ""; position: absolute; inset-inline-start: 0; top: .55em;
  width: 7px; height: 7px; background: var(--saffron-ink); border-radius: 1px;
}

.empty { color: var(--muted); font-size: 13.5px; padding: 18px 0; }
.err { color: var(--warn); }

/* --------------------------------------------------------------- mobile */

@media (max-width: 760px) {
  .masthead { grid-template-columns: 1fr; gap: 26px; padding-top: 40px; }
  .mast-side { align-items: flex-start; }
  .mast-facts { gap: 22px; }
  .mast-facts div { text-align: start; }
  .controls { flex-wrap: wrap; }
  .row { flex-direction: column; }
  .card-stats { margin-inline-start: 0; width: 100%; }
}

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