@import url("./fonts.css");

/* الظلّ شاهدًا — one sheet, both directions.
   Inline/block logical properties throughout: /ar/ is rtl, /en/ is ltr,
   and nothing here needs to know which. */

:root{
  /* palette: brass instrument on indigo night — astrolabe, not starfield */
  --ink:#141830;
  --ink-2:#1B2143;
  --ink-3:#232A52;
  --limestone:#E9E4D6;
  --limestone-dim:#A9A597;
  --brass:#C9A24B;
  --brass-bright:#E9C978;
  --rule:#2E3663;
  --instrument:#7FB2C4;
  --shadow-fill:#0E1226;

  --max:74rem;
  --measure:38rem;

  /* "Translit" and "Notation" are fallbacks, never primaries: CSS resolves
     fonts per character, so each only supplies what the face ahead of it
     cannot set — the transliteration marks and Greek respectively.
     See assets/fonts.css. */
  --ar-head:"Reem Kufi","Translit","Notation",system-ui,sans-serif;
  --ar-quran:"Amiri","Notation",Georgia,serif;
  --ar-body:"IBM Plex Sans Arabic","Translit","Notation",system-ui,sans-serif;
  --en-body:"IBM Plex Serif","Translit","Notation",Georgia,serif;
  --mono:"IBM Plex Mono","Translit","Notation",ui-monospace,SFMono-Regular,Menlo,monospace;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

body{
  margin:0;background:var(--ink);color:var(--limestone);
  font-family:var(--ar-body);
  font-weight:300;line-height:1.95;font-size:1.02rem;
  -webkit-font-smoothing:antialiased;
  background-image:radial-gradient(120% 60% at 50% -10%, #1E2550 0%, var(--ink) 60%);
  background-attachment:fixed;
}
html[lang="en"] body{font-family:var(--en-body);line-height:1.75;font-weight:300}

.wrap{max-width:var(--max);margin-inline:auto;padding-inline:1.5rem}

/* skip link — first tab stop on both routes */
/* parked above the viewport, not beside it: an inline offset would risk
   horizontal overflow in rtl */
.skip{
  position:absolute;inset-inline-start:1rem;inset-block-start:-4rem;z-index:100;
  background:var(--brass);color:var(--ink);font-family:var(--mono);font-size:.75rem;
  padding:.6rem 1rem;letter-spacing:.1em;text-decoration:none}
.skip:focus{inset-block-start:0}

/* ---------- masthead ---------- */
header.top{
  position:sticky;inset-block-start:0;z-index:40;
  background:rgba(20,24,48,.82);backdrop-filter:blur(10px);
  border-block-end:1px solid var(--rule);
}
.top-in{display:flex;align-items:center;justify-content:space-between;gap:1rem;
  max-width:var(--max);margin-inline:auto;padding:.6rem 1.5rem}
.mark{display:flex;align-items:center;gap:.6rem;font-family:var(--mono);
  font-size:.7rem;letter-spacing:.16em;color:var(--limestone-dim);text-transform:uppercase}
.mark svg{flex:none}
.mark .logo{inline-size:22px;block-size:22px}

/* language switcher: a real link to the sibling route */
.langs{display:flex;border:1px solid var(--rule);border-radius:2px;overflow:hidden}
.langs a,.langs span{
  font-family:var(--mono);font-size:.74rem;letter-spacing:.1em;
  padding:.38rem .8rem;text-decoration:none;display:block}
.langs span[aria-current]{background:var(--brass);color:var(--ink)}
.langs a{color:var(--limestone-dim)}
.langs a:hover{color:var(--brass-bright)}
.langs a:focus-visible{outline:2px solid var(--brass-bright);outline-offset:-2px}

/* ---------- hero ---------- */
.hero{padding-block:clamp(2.5rem,7vw,5rem) 2rem}
.ayah{
  font-family:var(--ar-quran);font-weight:400;
  font-size:clamp(1.45rem,3.4vw,2.5rem);line-height:2.15;
  text-align:center;color:var(--limestone);
  max-width:52rem;margin-inline:auto;margin-block:0 1rem;
}
html[lang="en"] .ayah{font-family:var(--en-body);font-style:italic;
  font-size:clamp(1.2rem,2.4vw,1.7rem);line-height:1.65;font-weight:300}
.ayah .em{color:var(--brass-bright)}
.ayah-ref{
  text-align:center;font-family:var(--mono);font-size:.74rem;
  letter-spacing:.18em;color:var(--limestone-dim);margin-block-end:2.6rem}
/* the page opens on the question, then answers it */
.kicker{display:block;font-family:var(--mono);font-size:.7rem;letter-spacing:.18em;
  text-transform:uppercase;color:var(--brass);margin-block-end:.75rem}
.ask{max-width:48rem;margin-inline:auto;margin-block:2.4rem 0}
.ask p{margin:0;max-width:none;color:var(--limestone);
  font-size:clamp(1.12rem,1.1rem + .5vw,1.32rem);line-height:1.85}
html[lang="en"] .ask p{line-height:1.6}

/* standfirst: the answer in brief, before the instrument */
.lede{max-width:48rem;margin-inline:auto;margin-block:1.9rem 2.8rem;
  border-block:1px solid var(--rule);padding-block:1.35rem}
.lede p{margin:0;max-width:none;font-size:1.06rem;line-height:1.95;color:#CFC9B9}
html[lang="en"] .lede p{line-height:1.8}

.thesis{
  max-width:44rem;margin-inline:auto;margin-block-start:2.4rem;text-align:center;
  font-size:1.06rem;color:#CFC9B9;line-height:1.9}
.thesis b{color:var(--brass-bright);font-weight:600}

/* ---------- instrument ---------- */
.instrument{
  border:1px solid var(--rule);background:linear-gradient(180deg,#181D3B,#131730);
  border-radius:3px;overflow:hidden;max-width:60rem;margin-inline:auto}
.inst-head{
  display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;
  padding:.55rem .9rem;border-block-end:1px solid var(--rule);
  font-family:var(--mono);font-size:.72rem;letter-spacing:.12em;
  color:var(--limestone-dim);text-transform:uppercase}
.inst-head .title{color:var(--brass)}
.sites{display:flex;gap:.35rem;flex-wrap:wrap;align-items:center}
.cities{display:flex;gap:.35rem;flex-wrap:wrap}
.cities button{
  background:none;border:1px solid var(--rule);color:var(--limestone-dim);
  font-family:var(--mono);font-size:.7rem;letter-spacing:.08em;padding:.24rem .55rem;
  cursor:pointer;border-radius:2px;transition:border-color .2s,color .2s}
.cities button[aria-pressed="true"]{border-color:var(--brass);color:var(--brass-bright)}
.cities button:focus-visible{outline:2px solid var(--brass-bright);outline-offset:1px}

/* latitude entry, alongside the presets */
.lat-field{display:flex;align-items:center;gap:.4rem;
  border:1px solid var(--rule);border-radius:2px;padding:.1rem .45rem}
.lat-field label{font-family:var(--mono);font-size:.68rem;letter-spacing:.1em;color:var(--limestone-dim)}
.lat-field input{
  inline-size:4.4rem;background:transparent;border:0;color:var(--brass-bright);
  font-family:var(--mono);font-size:.8rem;padding:.18rem 0;
  font-variant-numeric:tabular-nums;text-align:center}
.lat-field input:focus-visible{outline:2px solid var(--brass-bright);outline-offset:2px}

/* ---------- the two faces of the instrument ----------
   Plan and elevation, like the front and back of an astrolabe. The plan
   answers "which way" — which is what Mujahid's reading is actually about,
   the shadows inclining right and left. The elevation answers "how long". */
.dials{display:grid;gap:1px;background:var(--rule)}
@media (min-width:52rem){.dials{grid-template-columns:41fr 59fr}}
.dial{margin:0;background:linear-gradient(180deg,#181D3B,#131730);padding:0 .55rem .5rem;
  display:flex;flex-direction:column}
.dial svg{margin-block:auto}
.dial figcaption{font-family:var(--mono);font-size:.7rem;letter-spacing:.1em;
  text-transform:uppercase;color:var(--limestone-dim);padding:.6rem .15rem .35rem}
#plan,#sky{display:block;inline-size:100%;block-size:auto}
/* text-anchor resolves against the inline base direction, so an rtl page
   flips start/end and threw every label to the wrong side of its mark.
   Pin the anchors ltr; an all-Arabic run still shapes rtl inside them. */
#plan text,#sky text{direction:ltr}

/* plan: compass, the day's path, the Asr circles */
#plan-ring{stroke:var(--rule);fill:none;stroke-width:1}
#plan-trace{stroke:var(--brass);stroke-width:1.3;fill:none;opacity:.5}
#plan-asr circle{fill:none;stroke:var(--brass);stroke-width:1;stroke-dasharray:3 4;opacity:.65}
#plan-asr circle.hit{fill:var(--brass-bright);stroke:none;opacity:1}
#plan-asr text{fill:var(--brass);font-family:var(--mono);letter-spacing:.05em}
#plan-noon{stroke:var(--limestone-dim);stroke-width:1.3;stroke-dasharray:4 3;opacity:.7}
#plan-shadow{stroke:var(--instrument);stroke-width:3.6;stroke-linecap:round}
#plan-tip{fill:var(--instrument)}
#plan-foot{fill:var(--brass-bright)}
#plan-labels text{fill:var(--limestone-dim);font-family:var(--mono);letter-spacing:.08em}

/* elevation: the shadow square, graduated in digits */
#digit-scale line{stroke:var(--brass)}
#digit-scale text{fill:var(--limestone-dim);font-family:var(--mono)}
#noon-shadow{stroke:var(--limestone);stroke-width:2;stroke-dasharray:6 3;opacity:.8}
#asr-marks line{stroke:var(--brass);stroke-width:1.4}
#asr-marks line.build{stroke:var(--limestone-dim);stroke-width:1;stroke-dasharray:1 4;opacity:.45}
#asr-marks text{fill:var(--brass);font-family:var(--mono);letter-spacing:.05em}
#elev-labels text{fill:var(--limestone-dim);font-family:var(--mono);letter-spacing:.05em}

.inst-foot{padding:.7rem .9rem 1rem;border-block-start:1px solid var(--rule)}
.readout{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(7.5rem,1fr));gap:.6rem 1rem;
  font-family:var(--mono);margin-block-end:.9rem}
.readout div{display:flex;flex-direction:column;gap:.15rem}
/* 12px floor: these are the numbers the page is arguing from */
.readout .k{font-size:.75rem;letter-spacing:.12em;color:var(--limestone-dim);text-transform:uppercase;line-height:1.4}
.readout .v{font-size:1.05rem;color:var(--instrument);font-variant-numeric:tabular-nums}
.readout .v.brass{color:var(--brass-bright)}

/* time slider. Forced ltr in both routes: a time axis reads left-to-right
   like a clock face, and it keeps the Asr tick maths direction-free. */
/* top-aligned: the tick rail hangs below the track, and centring would
   drag the button down with it */
.slider-row{display:flex;align-items:flex-start;gap:.8rem}
.slider-wrap{flex:1;position:relative;direction:ltr}
input[type=range]{inline-size:100%;accent-color:var(--brass);block-size:1.4rem;background:transparent;display:block}
input[type=range]:focus-visible{outline:2px solid var(--brass-bright);outline-offset:3px}
/* The two thresholds are never more than ~90 min apart, so their labels
   would always collide horizontally. Each is one line, and the second one
   hangs from a longer stem — vertical separation, so width stops mattering. */
#slider-ticks{position:relative;block-size:3.2rem;pointer-events:none;direction:ltr}
#slider-ticks .stick{position:absolute;transform:translateX(-50%);text-align:center;
  inset-block-start:0;white-space:nowrap}
#slider-ticks .stick i{display:block;inline-size:1px;block-size:.5rem;background:var(--brass);margin-inline:auto}
#slider-ticks .stick.lo i{block-size:1.85rem}
#slider-ticks .stick b,#slider-ticks .stick u{
  font-family:var(--mono);font-size:.7rem;font-weight:400;letter-spacing:.06em;
  text-decoration:none;font-variant-numeric:tabular-nums}
#slider-ticks .stick b{color:var(--brass)}
#slider-ticks .stick u{color:var(--limestone-dim);margin-inline-start:.4rem}

.nowbtn{
  background:none;border:1px solid var(--brass);color:var(--brass-bright);
  font-family:var(--mono);font-size:.7rem;letter-spacing:.12em;
  padding:.3rem .7rem;cursor:pointer;border-radius:2px;white-space:nowrap;
  margin-block-start:.1rem}
.nowbtn:focus-visible{outline:2px solid var(--brass-bright);outline-offset:2px}

/* the below-horizon line lives in HTML, not in the SVG, so it stays
   selectable, translatable and at least 12px on a 360px screen */
.skynote{
  font-family:var(--mono);font-size:.78rem;letter-spacing:.04em;
  color:var(--limestone-dim);text-align:center;margin-block:.3rem 1.1rem;
  min-block-size:1.2em;max-inline-size:none}
html[lang="ar"] .skynote{font-family:var(--ar-body);font-size:.9rem;letter-spacing:0}

.inst-note{
  font-size:.86rem;color:var(--limestone-dim);line-height:1.75;margin-block:.9rem 0;
  padding-inline-start:.8rem;border-inline-start:2px solid var(--rule);max-inline-size:none}

/* ---------- section scaffolding: the shadow square ---------- */
section.part{padding-block-start:clamp(3rem,7vw,5.5rem)}
.part-head{display:flex;align-items:baseline;gap:1rem;margin-block-end:1.8rem;
  border-block-end:1px solid var(--rule);padding-block-end:.9rem}
.part-num{
  font-family:var(--mono);font-size:.74rem;letter-spacing:.2em;
  color:var(--brass);flex:none;padding-block-start:.35rem}
h2{
  font-family:var(--ar-head);font-weight:500;
  font-size:clamp(1.35rem,3vw,2rem);line-height:1.5;margin:0;color:var(--limestone)}
html[lang="en"] h2{font-family:var(--ar-body);font-weight:500;letter-spacing:-.01em}
h3{font-family:var(--ar-head);font-weight:500;font-size:1.06rem;color:var(--brass-bright);
  margin-block:2rem .6rem;letter-spacing:.01em}
html[lang="en"] h3{font-family:var(--ar-body);font-weight:600;font-size:1rem;
  letter-spacing:.04em;text-transform:uppercase}
p{max-width:var(--measure)}
.col p:first-child{margin-block-start:0}
strong{color:var(--limestone);font-weight:600}
/* 600 not 500: the shipped Arabic and Serif cuts are 300 and 600, and a
   500 target would resolve downward to 300 and read as lighter, not heavier */
em{color:var(--brass-bright);font-style:normal;font-weight:600}

/* physics notation: keep a Greek run and its combining marks in one face */
/* text-transform:none matters: the English h3 is uppercased, and uppercasing
   α yields Α, which reads as a Latin A — "THE BOUNDS ON A" */
.gk{font-family:"Notation","IBM Plex Mono",ui-monospace,Menlo,monospace;
  font-style:normal;letter-spacing:0;text-transform:none}
sup,sub{font-size:.72em;line-height:0;font-variant-numeric:normal}
sup{vertical-align:.46em}
sub{vertical-align:-.22em}
.q{font-family:var(--ar-quran);font-size:1.14em;color:var(--brass-bright)}
html[lang="en"] .q{font-family:var(--en-body);font-style:italic;font-size:1em}

/* two-kind split */
.split{display:grid;gap:1px;background:var(--rule);border:1px solid var(--rule);
  margin-block:2rem;grid-template-columns:1fr}
@media(min-width:44rem){.split{grid-template-columns:1fr 1fr}}
.split>div{background:var(--ink-2);padding:1.3rem 1.4rem}
.split .lab{font-family:var(--mono);font-size:.68rem;letter-spacing:.16em;
  color:var(--brass);text-transform:uppercase;display:block;margin-block-end:.5rem}
.split p{margin:0;font-size:.95rem;max-width:none}
.split .t{font-family:var(--ar-head);font-size:1.08rem;color:var(--limestone);margin-block-end:.5rem}
html[lang="en"] .split .t{font-family:var(--ar-body);font-weight:500}

/* ---------- α constraints ----------
   A real log axis. Bar length is computed from the published value, not
   chosen by eye; test/figures.test.mjs re-derives every position from the
   markup and fails if the drawing and the number disagree. Longer bar =
   tighter bound. The two panels never share an axis: different quantity,
   different unit. */
.cx{margin-block:1.1rem 2rem;border:1px solid var(--rule);padding:1rem 1.15rem .8rem}
.cx.rate{border-style:dashed}
.cx figcaption{margin-block-end:.5rem}

.cx-rows{list-style:none;margin:0;padding:0}
.cx-row{border-block-start:1px solid var(--rule);padding-block:.9rem .7rem}
.cx-row:first-child{border-block-start:0;padding-block-start:.3rem}

.cx-hit{display:flex;inline-size:100%;justify-content:space-between;align-items:baseline;
  gap:.8rem 1rem;flex-wrap:wrap;background:none;border:0;padding:0;cursor:pointer;
  color:inherit;font:inherit;text-align:start}
.cx-hit:focus-visible{outline:2px solid var(--brass-bright);outline-offset:3px}
.cx-hit .who{font-family:var(--ar-head);font-size:.98rem;color:var(--limestone)}
html[lang="en"] .cx-hit .who{font-family:var(--ar-body);font-weight:500;font-size:.92rem}
.cx-hit .val{font-family:var(--mono);font-size:.92rem;color:var(--brass-bright);white-space:nowrap}

.cx-track{position:relative;block-size:3px;background:var(--ink-3);margin-block:.65rem .45rem}
.cx-track i{position:absolute;inset-block:0;inset-inline-start:0;inline-size:var(--at);
  display:block;background:linear-gradient(to right,var(--brass),var(--instrument))}
html[dir="rtl"] .cx-track i{background:linear-gradient(to left,var(--brass),var(--instrument))}
.cx-track b{position:absolute;inset-inline-start:var(--at);inset-block-start:-5px;
  inline-size:2px;block-size:13px;background:var(--brass-bright);margin-inline-start:-1px;
  transition:block-size .15s,inset-block-start .15s}
.cx-row:hover .cx-track b,.cx-row:focus-within .cx-track b{block-size:19px;inset-block-start:-8px}

.cx-meta{margin:0;max-width:none;font-family:var(--mono);font-size:.68rem;letter-spacing:.1em;
  color:var(--limestone-dim);text-transform:uppercase}
.cx-meta a{color:var(--instrument);text-decoration:none;border-block-end:1px solid var(--rule)}
.cx-meta a:hover{color:var(--brass-bright);border-color:var(--brass)}
.cx-meta a:focus-visible{outline:2px solid var(--brass-bright);outline-offset:2px}

.cx-axis{display:flex;justify-content:space-between;margin-block-start:.6rem;
  padding-block-start:.4rem;border-block-start:1px solid var(--rule);
  font-family:var(--mono);font-size:.68rem;color:var(--limestone-dim)}

/* the exact published value with its uncertainty — extra detail, never the
   load-bearing text. Bound, method, epoch and citation are unconditional. */
.cx-detail{display:none}
.cx-detail p{margin:.6rem 0 0;max-width:none;font-size:.88rem;line-height:1.75;
  color:var(--limestone-dim);padding-inline-start:.75rem;border-inline-start:2px solid var(--brass)}
.cx-hit[aria-expanded="true"] ~ .cx-detail,
.cx-row:hover .cx-detail,
.cx-row:focus-within .cx-detail{display:block}
@media (scripting:none){.cx-detail{display:block}}

/* quantity heading: names what is bounded, and in what units */
.qgroup{font-family:var(--mono);font-size:.8rem;font-weight:400;letter-spacing:.1em;
  color:var(--instrument);margin-block:1.8rem .6rem;text-transform:none}

/* the two quantities are not the same quantity */
.qnote{font-size:.86rem;color:var(--limestone-dim);border-inline-start:2px solid var(--brass);
  padding-inline-start:.8rem;margin-block:1.2rem;max-inline-size:var(--measure)}

/* object cards */
.objects{display:grid;gap:1px;background:var(--rule);border:1px solid var(--rule);
  margin-block:2rem;grid-template-columns:1fr}
@media(min-width:38rem){.objects{grid-template-columns:1fr 1fr}}
@media(min-width:64rem){.objects{grid-template-columns:1fr 1fr 1fr}}
.obj{background:var(--ink-2);padding:1.3rem 1.35rem;display:flex;flex-direction:column;gap:.5rem}
.obj:hover{background:var(--ink-3)}
.obj h4{margin:0;font-family:var(--ar-head);font-weight:500;font-size:1.15rem;color:var(--brass-bright)}
html[lang="en"] .obj h4{font-family:var(--ar-body);font-weight:600;font-size:1rem}
.obj p{margin:0;font-size:.9rem;line-height:1.8;color:#C6C1B2;max-width:none}
/* no direction override: bidi already keeps a pure-notation datum ltr, and
   forcing ltr reversed the Arabic ones — "جذر ≈ 4–6 × الارتفاع" came out
   back to front */
.obj .datum{font-family:var(--mono);font-size:.75rem;color:var(--instrument);
  letter-spacing:.04em;padding-block-start:.5rem;margin-block-start:auto;
  border-block-start:1px dotted var(--rule);text-align:start}

/* verdict block */
.verdict{margin-block:2rem;border:1px solid var(--rule)}
.verdict>div{padding:1.3rem 1.4rem;border-block-end:1px solid var(--rule)}
.verdict>div:last-child{border-block-end:0}
.verdict .tag{font-family:var(--mono);font-size:.68rem;letter-spacing:.16em;
  text-transform:uppercase;display:inline-block;padding:.2rem .55rem;
  margin-block-end:.7rem;border:1px solid}
.ok .tag{color:var(--brass-bright);border-color:var(--brass)}
.no .tag{color:#D98A7A;border-color:#8A4A3E}
.verdict p{margin:0;max-width:none;font-size:.97rem}

.callout{
  margin-block:2rem;padding:1.2rem 1.4rem;background:var(--ink-2);
  border-inline-start:2px solid var(--brass)}
.callout p{margin:0;max-width:none;font-size:.95rem}
.callout .lab{font-family:var(--mono);font-size:.68rem;letter-spacing:.16em;
  color:var(--brass);text-transform:uppercase;display:block;margin-block-end:.55rem}

.pull{
  margin-block:3rem;margin-inline:auto;max-width:46rem;text-align:center;
  font-family:var(--ar-quran);font-size:clamp(1.35rem,3vw,1.95rem);
  line-height:1.9;color:var(--brass-bright)}
html[lang="en"] .pull{font-family:var(--en-body);font-style:italic;font-weight:300;line-height:1.5}

/* sources */
ol.src{max-width:52rem;padding-inline-start:1.2rem;font-size:.9rem;line-height:2}
ol.src li{margin-block-end:.5rem;color:#C6C1B2}
ol.src a{color:var(--instrument);text-decoration:none;border-block-end:1px solid var(--rule)}
ol.src a:hover{color:var(--brass-bright);border-color:var(--brass)}
ol.src a:focus-visible{outline:2px solid var(--brass-bright);outline-offset:2px}
ol.src .ref{font-family:var(--mono);font-size:.82rem;color:var(--limestone-dim);
  display:block;direction:ltr;text-align:start}
/* no synthetic faces: the mono cut ships one weight and no italic, so carry
   the citation's structure with colour instead of slope and weight */
ol.src .ref i{font-style:normal;color:var(--limestone)}
ol.src .ref b{font-weight:400;color:var(--limestone)}

footer{margin-block-start:4rem;border-block-start:1px solid var(--rule);
  padding-block:1.6rem 3rem;
  font-family:var(--mono);font-size:.7rem;letter-spacing:.1em;
  color:var(--limestone-dim);text-transform:uppercase}
.foot-in{display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;
  max-width:var(--max);margin-inline:auto;padding-inline:1.5rem}

/* ---------- narrow screens ---------- */
@media (max-width:30rem){
  .wrap{padding-inline:1.1rem}
  .top-in{padding-inline:1.1rem}
  .foot-in{padding-inline:1.1rem}
  body{font-size:1rem}
  .readout{grid-template-columns:1fr 1fr;gap:.7rem .9rem}
  .inst-head{font-size:.7rem}
  .slider-row{flex-wrap:wrap}
  .nowbtn{inline-size:100%}
  .split>div,.obj,.verdict>div,.callout{padding-inline:1.05rem}
}