/* Layout: a "case file" — narrow mono margin column for metadata, wide column for the argument. One signature moment: the tangled thread in the hero. */
:root {
  --paper: #FFFFFF;
  --paper-2: #F1F1F0;
  --ink: #1B1C1E;
  --ink-2: #5B5D61;
  --rule: #DDDDDB;
  --signal: #D7261E;
  --signal-soft: rgba(215, 38, 30, .08);

  /* Latin face first; Arabic and Simplified Chinese faces follow so each script falls through to a matching face */
  --f-display: "Newsreader", "Noto Naskh Arabic", "Noto Serif SC", "Iowan Old Style", "Times New Roman", serif;
  --f-body: "Public Sans", "IBM Plex Sans Arabic", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --f-mono: "JetBrains Mono", "IBM Plex Sans Arabic", "Noto Sans SC", ui-monospace, "SF Mono", Menlo, monospace;

  --s-1: .75rem; --s-2: 1rem; --s-3: 1.5rem; --s-4: 2.5rem; --s-5: 4rem; --s-6: 7rem;
  --margin-col: 12rem;
  --max: 76rem;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #18191B; --paper-2: #222326; --ink: #F4F4F2; --ink-2: #A4A6A9;
    --rule: #35373B; --signal: #F2453B; --signal-soft: rgba(242, 69, 59, .12);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #18191B; --paper-2: #222326; --ink: #F4F4F2; --ink-2: #A4A6A9;
  --rule: #35373B; --signal: #F2453B; --signal-soft: rgba(242, 69, 59, .12);
  color-scheme: dark;
}

* { box-sizing: border-box; }
body {
  background: var(--paper); color: var(--ink);
  font-family: var(--f-body); font-size: 1.0625rem; line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; }

.wrap { max-width: var(--max); margin-inline: auto; padding-inline: clamp(1rem, 4vw, 3rem); }

.mono { font-family: var(--f-mono); font-size: .75rem; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-2); }

/* ---------- header ---------- */
.top {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 10;
  background: color-mix(in srgb, var(--paper) 90%, transparent);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
}
.top .wrap { display: flex; align-items: center; gap: var(--s-3); min-height: 4rem; }
.mark { display: flex; align-items: baseline; gap: .6rem; text-decoration: none; white-space: nowrap; }
.mark b { font-family: "Newsreader", serif; font-weight: 400; font-size: 1.35rem; letter-spacing: -.01em; }
.mark span { font-family: "JetBrains Mono", monospace; font-size: .68rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-2); }
.nav { display: flex; gap: var(--s-3); margin-inline-start: auto; }
.nav a { text-decoration: none; font-size: .9rem; color: var(--ink-2); white-space: nowrap; }
.nav a:hover { color: var(--ink); }
.btn {
  display: inline-flex; align-items: center; gap: .6rem;
  font: 500 .9rem/1.1 var(--f-body); text-decoration: none; cursor: pointer;
  padding: .85rem 1.2rem; border: 1px solid var(--ink); background: var(--ink); color: var(--paper);
  border-radius: 0; transition: background .2s, color .2s; white-space: nowrap;
}
.btn:hover { background: var(--signal); border-color: var(--signal); color: #fff; }
.btn.ghost { background: transparent; color: var(--ink); }
.btn.ghost:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn .short { display: none; }
@media (max-width: 1080px) { .nav { gap: var(--s-2); } .nav a:nth-child(5) { display: none; } }
@media (max-width: 920px) { .nav { display: none; } .lang { margin-inline-start: auto; } }
@media (max-width: 560px) { .top .btn .long { display: none; } .top .btn .short { display: inline; } .top .btn { padding: .7rem .9rem; } .top .wrap { gap: .6rem; } }
@media (max-width: 440px) { .mark span { display: none; } }

/* ---------- language switcher ---------- */
.lang { position: relative; }
.lang-btn {
  display: inline-flex; align-items: center; gap: .45rem; min-height: 2.6rem;
  font: 500 .78rem "JetBrains Mono", monospace; letter-spacing: .06em;
  background: none; color: var(--ink); border: 1px solid var(--rule); padding: .55rem .7rem; cursor: pointer;
}
.lang-btn:hover, .lang-btn[aria-expanded="true"] { border-color: var(--ink); }
.lang-btn svg { width: 10px; height: 10px; transition: transform .2s; }
.lang-btn[aria-expanded="true"] svg { transform: rotate(180deg); }
.lang-menu {
  position: absolute; top: calc(100% + 6px); inset-inline-end: 0; z-index: 30;
  list-style: none; margin: 0; padding: .3rem 0; min-width: 13rem;
  background: var(--paper); border: 1px solid var(--ink); box-shadow: 0 14px 34px rgba(0,0,0,.14);
}
.lang-menu button {
  display: grid; grid-template-columns: 2.4rem minmax(0, 1fr) .8rem; align-items: center; gap: .3rem;
  width: 100%; padding: .65rem .9rem; background: none; border: 0; cursor: pointer;
  color: var(--ink); font: 400 1rem var(--f-body); text-align: start;
}
.lang-menu button:hover, .lang-menu button:focus-visible { background: var(--paper-2); outline: none; }
.lang-menu button b { font: 500 .72rem "JetBrains Mono", monospace; letter-spacing: .06em; color: var(--ink-2); }
.lang-menu button i { width: 6px; height: 6px; border-radius: 50%; justify-self: end; }
.lang-menu button[aria-checked="true"] { color: var(--signal); }
.lang-menu button[aria-checked="true"] i { background: var(--signal); }

/* ---------- section scaffold ---------- */
section { border-bottom: 1px solid var(--rule); }
.row {
  display: grid; grid-template-columns: var(--margin-col) minmax(0, 1fr);
  gap: var(--s-4); padding-block: var(--s-6);
}
.row > aside { position: relative; }
.row > aside .mono { position: sticky; top: 6rem; display: grid; gap: .35rem; }
.row > aside .mono b { color: var(--ink); font-weight: 500; }
@media (max-width: 860px) {
  .row { grid-template-columns: minmax(0, 1fr); gap: var(--s-3); padding-block: var(--s-5); }
  .row > aside .mono { position: static; grid-auto-flow: column; justify-content: start; gap: 1.25rem; }
}

h2 {
  font-family: var(--f-display); font-weight: 300; font-size: clamp(2rem, 4.2vw, 3.4rem);
  line-height: 1.06; letter-spacing: -.02em; margin: 0 0 var(--s-3); text-wrap: balance; max-width: 22ch;
}
h2 em { font-style: italic; color: var(--signal); }
.lede { font-size: 1.15rem; color: var(--ink-2); max-width: 58ch; margin: 0; }

/* ---------- hero ---------- */
.hero .row { padding-block: var(--s-5); align-items: start; }
.hero h1 {
  font-family: var(--f-display); font-weight: 300;
  font-size: clamp(2.7rem, 7.4vw, 6.4rem); line-height: .98; letter-spacing: -.035em;
  margin: 0; text-wrap: balance;
}
.hero h1 .after { display: block; font-style: italic; color: var(--ink-2); }
.thread-box { position: relative; margin-top: var(--s-4); border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
#thread { display: block; width: 100%; height: clamp(150px, 22vw, 230px); cursor: ew-resize; touch-action: pan-y; }
[dir="rtl"] #thread { transform: scaleX(-1); }
.thread-cap { display: flex; justify-content: space-between; gap: var(--s-2); padding-block: .6rem; flex-wrap: wrap; }

.motto {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s-3);
  margin-top: var(--s-4); align-items: start;
}
.motto > div { display: grid; gap: .3rem; }
.motto .word { font-family: "JetBrains Mono", monospace; font-weight: 500; font-size: clamp(1.4rem, 3.2vw, 2.4rem); letter-spacing: .02em; line-height: 1.1; }
.motto .yes .word { color: var(--signal); }
.motto .never .word s { text-decoration-thickness: .09em; text-decoration-color: var(--ink); color: var(--ink-2); }
.motto .sub { font-family: var(--f-display); font-style: italic; font-size: 1rem; color: var(--ink-2); }
.hero-foot { display: flex; flex-wrap: wrap; gap: var(--s-3); align-items: center; margin-top: var(--s-4); }
.hero-foot p { margin: 0; max-width: 46ch; color: var(--ink-2); }
.hero-foot .ctas { display: flex; gap: .75rem; flex-wrap: wrap; margin-inline-start: auto; }
@media (max-width: 860px) { .hero-foot .ctas { margin-inline-start: 0; } }

/* ---------- when people come ---------- */
.ledger { list-style: none; padding: 0; margin: var(--s-4) 0 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: var(--s-4); }
.ledger li { display: grid; grid-template-columns: 1.5rem minmax(0, 1fr); gap: .75rem; padding-block: .95rem; border-top: 1px solid var(--rule); }
.ledger li::before { content: "—"; color: var(--ink-2); font-family: "JetBrains Mono", monospace; }
@media (max-width: 640px) { .ledger { grid-template-columns: minmax(0, 1fr); } }
.pull {
  margin: var(--s-5) 0 0; font-family: var(--f-display); font-weight: 300; font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  line-height: 1.25; max-width: 30ch; text-wrap: balance;
}
.pull span { color: var(--ink-2); }

/* ---------- what we do: three areas, two kinds of problem ---------- */
.dirs {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  grid-template-areas: "ga ga gb" "d1 d2 d3"; margin-top: var(--s-4);
}
.grp { display: flex; justify-content: space-between; gap: 1rem; padding-bottom: .6rem; border-bottom: 1px solid var(--ink); }
.grp.a { grid-area: ga; }
.grp.b { grid-area: gb; margin-inline-start: var(--s-3); }
.dir { padding-block: var(--s-3) var(--s-2); display: grid; gap: .8rem; align-content: start; min-width: 0; }
.dir.d1 { grid-area: d1; padding-inline-end: var(--s-3); }
.dir.d2 { grid-area: d2; padding-inline: var(--s-3); border-inline-start: 1px dashed var(--rule); }
.dir.d3 { grid-area: d3; margin-inline-start: var(--s-3); padding-inline-start: var(--s-3); border-inline-start: 1px solid var(--rule); }
.dir .head { display: flex; align-items: baseline; justify-content: space-between; gap: .75rem; flex-wrap: wrap; }
.dir .num { font-family: "JetBrains Mono", monospace; font-size: .8rem; color: var(--signal); letter-spacing: .08em; }
.dir .badge { font-family: var(--f-mono); font-size: .66rem; letter-spacing: .06em; text-transform: uppercase; color: var(--signal); border: 1px solid currentColor; padding: .2rem .45rem; }
.dir h3 { font-family: var(--f-display); font-weight: 400; font-size: clamp(1.55rem, 2.3vw, 2rem); line-height: 1.08; letter-spacing: -.015em; margin: 0; text-wrap: balance; }
.dir .tag { font-family: var(--f-display); font-style: italic; font-size: 1.08rem; line-height: 1.35; color: var(--ink-2); margin: 0; }
.dir p { margin: 0; font-size: .98rem; }
.dir svg { width: 100%; max-width: 100%; height: auto; margin-block: .25rem; }
.chips { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .2rem; }
.chips span { font-family: var(--f-mono); font-size: .7rem; letter-spacing: .03em; padding: .35rem .55rem; border: 1px solid var(--rule); color: var(--ink-2); }
@media (max-width: 900px) {
  .dirs { grid-template-columns: minmax(0, 1fr); grid-template-areas: "ga" "d1" "d2" "gb" "d3"; }
  .grp.b { margin-inline-start: 0; margin-top: var(--s-4); }
  .dir.d1, .dir.d2, .dir.d3 { padding-inline: 0; margin-inline-start: 0; border-inline-start: 0; }
  .dir.d2 { border-top: 1px dashed var(--rule); }
}

.audit { margin-top: var(--s-4); border-top: 2px solid var(--signal); padding-top: var(--s-3); }
.audit > .mono { color: var(--signal); }
.audit-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--s-4); margin-top: var(--s-3); }
.audit h4 { font-family: var(--f-display); font-weight: 400; font-size: 1.2rem; line-height: 1.2; margin: 0 0 .7rem; text-wrap: balance; }
.audit ul, .panel ul { margin: 0; padding: 0; list-style: none; display: grid; gap: .45rem; }
.audit li, .panel li { padding-inline-start: 1rem; position: relative; font-size: .95rem; line-height: 1.45; }
.audit li::before, .panel li::before { content: ""; position: absolute; inset-inline-start: 0; top: .7em; width: .4rem; height: 1px; background: var(--ink-2); }
.fine { margin: var(--s-3) 0 0; color: var(--ink-2); font-size: .9rem; max-width: 70ch; }
@media (max-width: 900px) { .audit-grid { grid-template-columns: minmax(0, 1fr); gap: var(--s-3); } }

/* ---------- audiences ---------- */
.tabs { display: flex; margin-top: var(--s-4); border-bottom: 1px solid var(--rule); overflow-x: auto; }
.tabs button {
  font: 500 .95rem var(--f-body); color: var(--ink-2); background: none; border: 0; cursor: pointer;
  padding-block: .9rem; padding-inline: 0 1.2rem; margin-inline-end: 1.4rem; border-bottom: 2px solid transparent; white-space: nowrap;
  display: flex; gap: .5rem; align-items: baseline;
}
.tabs button i { font-style: normal; font-family: "JetBrains Mono", monospace; font-size: .72rem; }
.tabs button[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--signal); }
.panel { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: var(--s-4); padding-top: var(--s-4); }
.panel h4 { font-family: var(--f-display); font-weight: 400; font-size: 1.6rem; line-height: 1.15; margin: 0 0 var(--s-2); text-wrap: balance; }
.panel p { color: var(--ink-2); margin: 0; }
.panel .cols { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s-3); }
.panel .cols h5 { margin: 0 0 .5rem; }
@media (max-width: 760px) { .panel, .panel .cols { grid-template-columns: minmax(0, 1fr); } }

/* ---------- honesty ---------- */
.honest { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: var(--s-4); border-top: 1px solid var(--ink); }
.honest > div { padding-top: var(--s-3); min-width: 0; }
.honest > div:first-child { padding-inline-end: var(--s-4); }
.honest > div + div { border-inline-start: 1px solid var(--rule); padding-inline-start: var(--s-4); }
.honest h3 { margin: 0 0 var(--s-2); font-family: var(--f-mono); font-weight: 500; font-size: .85rem; letter-spacing: .08em; text-transform: uppercase; }
.honest .yes h3 { color: var(--signal); }
.honest ul { list-style: none; padding: 0; margin: 0; }
.honest li { padding-block: .8rem; border-bottom: 1px solid var(--rule); }
.honest .no li { color: var(--ink-2); }
.honest .no li s { text-decoration-color: var(--ink-2); }
@media (max-width: 760px) {
  .honest { grid-template-columns: minmax(0, 1fr); }
  .honest > div:first-child { padding-inline-end: 0; }
  .honest > div + div { border-inline-start: 0; padding-inline-start: 0; margin-top: var(--s-3); }
}

/* ---------- process ---------- */
.steps { list-style: none; padding: 0; margin: var(--s-4) 0 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--s-3); counter-reset: s; --step: "Step"; }
.steps li { border-top: 1px solid var(--ink); padding-top: var(--s-2); display: grid; gap: .5rem; align-content: start; counter-increment: s; }
.steps li::before { content: var(--step) " " counter(s); font-family: var(--f-mono); font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; color: var(--signal); }
.steps b { font-family: var(--f-display); font-weight: 400; font-size: 1.35rem; line-height: 1.15; }
.steps p { margin: 0; color: var(--ink-2); font-size: .95rem; }
@media (max-width: 980px) { .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: var(--s-4); } }
@media (max-width: 520px) { .steps { grid-template-columns: minmax(0, 1fr); } }

/* ---------- contact ---------- */
.contact { background: var(--paper-2); }
.form { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s-3); margin-top: var(--s-4); max-width: 52rem; }
.form .full { grid-column: 1 / -1; }
.field { display: grid; gap: .45rem; min-width: 0; }
.field > label, .field legend { font-family: var(--f-mono); font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-2); padding: 0; }
.field input[type="text"], .field textarea {
  font: 400 1rem var(--f-body); color: var(--ink); background: var(--paper);
  border: 1px solid var(--rule); border-radius: 0; padding: .85rem .9rem; width: 100%;
}
.field textarea { min-height: 9rem; resize: vertical; line-height: 1.5; }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--signal); box-shadow: 0 0 0 3px var(--signal-soft); }
fieldset.field { border: 0; margin: 0; padding: 0; }
.seg { display: flex; flex-wrap: wrap; gap: .5rem; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg label { font: 400 .92rem var(--f-body); color: var(--ink); border: 1px solid var(--rule); padding: .6rem .9rem; cursor: pointer; background: var(--paper); }
.seg input:checked + label { border-color: var(--signal); background: var(--signal-soft); }
.seg input:focus-visible + label { outline: 2px solid var(--signal); outline-offset: 2px; }
.form-foot { display: flex; flex-wrap: wrap; gap: var(--s-3); align-items: center; }
.form-foot p { margin: 0; font-size: .9rem; color: var(--ink-2); max-width: 48ch; }
.sent { border: 1px solid var(--signal); background: var(--signal-soft); padding: var(--s-3); max-width: 52rem; margin-top: var(--s-4); }
.sent b { font-family: var(--f-display); font-weight: 400; font-size: 1.5rem; display: block; margin-bottom: .4rem; }
.sent p { margin: 0; color: var(--ink-2); }
@media (max-width: 640px) { .form { grid-template-columns: minmax(0, 1fr); } }

/* ---------- footer ---------- */
footer .wrap { display: grid; grid-template-columns: var(--margin-col) minmax(0, 1fr); gap: var(--s-4); padding-block: var(--s-5); }
footer .big { font-family: "JetBrains Mono", monospace; font-weight: 500; font-size: clamp(1.1rem, 2.4vw, 1.6rem); letter-spacing: .02em; margin: 0 0 var(--s-3); }
footer .big .y { color: var(--signal); }
footer .big s { color: var(--ink-2); text-decoration-color: var(--ink); }
footer small { display: block; color: var(--ink-2); font-size: .82rem; line-height: 1.55; max-width: 70ch; }
footer .meta { display: flex; flex-wrap: wrap; gap: var(--s-3); margin-top: var(--s-3); }
@media (max-width: 860px) { footer .wrap { grid-template-columns: minmax(0, 1fr); gap: var(--s-2); } }

/* ---------- script-specific typography ---------- */
/* Chinese: no faux italics, no negative tracking, looser leading */
:root:lang(zh) body { line-height: 1.8; }
:root:lang(zh) .hero h1 { letter-spacing: 0; line-height: 1.2; font-size: clamp(2.3rem, 6.2vw, 5.2rem); }
:root:lang(zh) h2 { letter-spacing: 0; line-height: 1.3; }
:root:lang(zh) h2 em, :root:lang(zh) .hero h1 .after, :root:lang(zh) .dir .tag, :root:lang(zh) .motto .sub { font-style: normal; }
:root:lang(zh) .mono, :root:lang(zh) .dir .badge, :root:lang(zh) .honest h3 { letter-spacing: .1em; }
/* Arabic: tracking breaks letter joining, so it is zero everywhere outside Latin-only marks */
:root:lang(ar) body { line-height: 1.85; }
:root:lang(ar) :where(main, footer small, .nav, .lang-menu, .tabs, .form, .steps) * { letter-spacing: 0 !important; }
:root:lang(ar) .mono, :root:lang(ar) .dir .badge, :root:lang(ar) .honest h3, :root:lang(ar) .field > label, :root:lang(ar) .field legend { letter-spacing: 0; font-size: .82rem; }
:root:lang(ar) .hero h1 { letter-spacing: 0; line-height: 1.35; font-weight: 400; font-size: clamp(2.3rem, 6.2vw, 5.2rem); }
:root:lang(ar) h2 { letter-spacing: 0; line-height: 1.4; font-weight: 400; }
:root:lang(ar) h2 em, :root:lang(ar) .hero h1 .after, :root:lang(ar) .dir .tag, :root:lang(ar) .motto .sub { font-style: normal; }
:root:lang(ar) .ltr-only * { letter-spacing: revert; }

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