/* ============================================================
   THE THIRTYTHIRD ADVISORY — brand.css
   Shared design system. Palette and type from brand book
   33C-BRAND-01; visual rules from 33C-WEB-01 §08.

   Palette (exact):
     Obsidian Black  #111111   primary ground   60%
     Porcelain White #F8F7F4   primary text     25%
     Soft Silver     #D8D8D6   neutral / accent 10%
     Graphite Gray   #5A5A5A   structure         5%

   Type:
     Fraunces  — serif display (headings, the numeral)
     Alexandria — grotesque, body + Latin UI
     Noto Kufi Arabic — Arabic
   ============================================================ */

:root{
  /* ground + ink */
  --obsidian:#111111;
  --obsidian-2:#0d0d0d;
  --obsidian-3:#161616;
  --porcelain:#F8F7F4;
  --silver:#D8D8D6;
  --graphite:#5A5A5A;

  /* derived tints — silver-biased neutrals, never pure grey */
  --line:rgba(216,216,214,.13);
  --line-soft:rgba(216,216,214,.06);
  --line-strong:rgba(216,216,214,.24);
  --dim:rgba(248,247,244,.56);
  --dimmer:rgba(248,247,244,.34);
  --faint:rgba(248,247,244,.16);

  /* the single restrained accent (§08: once per viewport, a rule/mark/line —
     never a fill). A cool metallic silver, not gold. */
  --accent:#C8C6BE;

  --ease:cubic-bezier(.16,1,.3,1);
  --ease-io:cubic-bezier(.65,0,.35,1);

  --pad:clamp(20px,6vw,72px);
  --measure:1200px;

  /* type roles */
  --serif:'Fraunces','Cormorant Garamond',Georgia,serif;
  --sans:'Alexandria',system-ui,-apple-system,'Segoe UI',sans-serif;
  --arabic:'Noto Kufi Arabic','Alexandria',sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--obsidian);
  color:var(--porcelain);
  font-family:var(--sans);
  font-weight:300;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
  line-height:1.7;
  letter-spacing:.004em;
}
::selection{background:rgba(216,216,214,.2);color:var(--porcelain)}
a{color:inherit;text-decoration:none}
img,svg,canvas{display:block;max-width:100%}
img[width][height]{height:auto}
:focus-visible{outline:1px solid var(--silver);outline-offset:5px}

/* ---- display type: Fraunces, set with optical restraint ---- */
.serif{font-family:var(--serif);font-optical-sizing:auto}

/* ---- eyebrow / label ---- */
.eyebrow{
  font-family:var(--sans);
  font-size:9px;font-weight:500;letter-spacing:.5em;
  text-transform:uppercase;color:var(--dim);
}

/* ============================================================
   ATMOSPHERE — the coordinate field (brand book §Pattern)
   A faint lat/long graticule, drawn on canvas. Replaces the
   generic halftone. Fixed, behind everything, non-interactive.
   ============================================================ */
.field{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.field canvas{position:absolute;inset:0;width:100%;height:100%;opacity:.5}
.field .glow{
  position:absolute;width:70vw;height:70vw;top:-26vw;right:-18vw;border-radius:50%;
  background:radial-gradient(circle,rgba(140,140,140,.16),transparent 62%);
  filter:blur(40px);
}
.field .grain{
  position:absolute;inset:0;opacity:.022;mix-blend-mode:screen;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* scroll progress — a single hairline, no glow gimmick */
.progress{position:fixed;top:0;left:0;height:1px;width:0;z-index:80;background:var(--accent)}

/* ============================================================
   HEADER
   ============================================================ */
.topbar{
  position:fixed;top:0;left:0;right:0;z-index:70;
  display:flex;align-items:center;justify-content:space-between;
  padding:22px var(--pad);
  transition:background .5s var(--ease),padding .5s var(--ease),border-color .5s;
  border-bottom:1px solid transparent;
}
.topbar.scrolled{
  background:rgba(13,13,13,.72);backdrop-filter:blur(12px) saturate(1.1);
  padding-top:15px;padding-bottom:15px;border-bottom-color:var(--line-soft);
}
.mark{display:flex;flex-direction:column;align-items:flex-start;gap:6px}
.mark .word{width:clamp(146px,15vw,188px);height:auto;transition:opacity .5s var(--ease)}
.mark:hover .word{opacity:.82}
.mark .cap{font-size:8px;font-weight:400;letter-spacing:.46em;color:var(--dim);text-transform:uppercase;padding-left:2px}

.nav{display:flex;align-items:center;gap:clamp(14px,2.2vw,32px)}
.nav a{font-size:10px;font-weight:400;letter-spacing:.22em;text-transform:uppercase;color:var(--dim);position:relative;transition:color .4s var(--ease)}
.nav a::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:1px;background:var(--accent);transition:width .45s var(--ease)}
.nav a:hover{color:var(--porcelain)}
.nav a:hover::after{width:100%}
.nav .pill{border:1px solid var(--line-strong);border-radius:40px;padding:9px 20px;color:var(--porcelain)}
.nav .pill::after{display:none}
.nav .pill:hover{border-color:var(--silver);background:rgba(248,247,244,.04)}
@media(max-width:860px){.nav a:not(.pill):not(.keep){display:none}}
@media(max-width:520px){.nav .pill{padding:8px 15px;font-size:9px}}

.lang-btn{
  background:transparent;border:1px solid var(--line-strong);border-radius:40px;color:var(--porcelain);
  cursor:pointer;font-family:var(--sans);font-size:10px;letter-spacing:.14em;padding:9px 16px;
  transition:border-color .4s var(--ease),background .4s var(--ease);
}
.lang-btn:hover{border-color:var(--silver);background:rgba(248,247,244,.045)}

/* ============================================================
   LAYOUT PRIMITIVES
   ============================================================ */
main{position:relative;z-index:1}
section{padding:clamp(88px,15vh,168px) var(--pad);position:relative}
.wrap{max-width:var(--measure);margin:0 auto}

/* §08 motion: fades on scroll-in only, calm. */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}
.d1{transition-delay:.06s}.d2{transition-delay:.13s}.d3{transition-delay:.2s}.d4{transition-delay:.27s}.d5{transition-delay:.34s}

/* folio header — a numbered dossier rule */
.folio{display:flex;align-items:baseline;gap:18px;margin-bottom:44px;border-bottom:1px solid var(--line-soft);padding-bottom:16px}
.folio .t{font-size:9px;font-weight:500;letter-spacing:.5em;text-transform:uppercase;color:var(--dim)}
.folio .meta{margin-left:auto;font-size:9px;letter-spacing:.3em;text-transform:uppercase;color:var(--faint);font-variant-numeric:tabular-nums}
@media(max-width:640px){.folio .meta{display:none}}

/* buttons — restrained, no letter-spacing animation gimmick */
.btn{
  display:inline-flex;align-items:center;gap:12px;padding:16px 30px;
  border:1px solid var(--line-strong);border-radius:2px;
  font-family:var(--sans);font-size:10px;font-weight:500;letter-spacing:.24em;text-transform:uppercase;color:var(--porcelain);
  transition:border-color .45s var(--ease),background .45s var(--ease),color .45s;
}
.btn:hover{border-color:var(--silver);background:rgba(248,247,244,.045)}
.btn .dot{width:5px;height:5px;border-radius:50%;background:var(--accent);transition:transform .45s var(--ease)}
.btn:hover .dot{transform:scale(1.35)}
.btn.solid{background:var(--porcelain);color:var(--obsidian);border-color:var(--porcelain)}
.btn.solid .dot{background:var(--obsidian)}
.btn.solid:hover{background:var(--silver);border-color:var(--silver)}

/* ============================================================
   FOOTER (shared)
   ============================================================ */
.foot{border-top:1px solid var(--line);padding:clamp(52px,7vw,86px) var(--pad);background:var(--obsidian-2);position:relative;z-index:1}
.foot .wrap{display:flex;justify-content:space-between;align-items:flex-start;gap:40px;flex-wrap:wrap}
.foot .mark .word{width:clamp(168px,17vw,210px)}
.foot .cols{display:flex;gap:clamp(40px,6vw,88px);flex-wrap:wrap}
.foot .col{display:flex;flex-direction:column;gap:9px}
.foot .col .lbl{font-size:9px;letter-spacing:.4em;text-transform:uppercase;color:var(--dimmer);margin-bottom:6px}
.foot .col a,.foot .col span{font-size:14px;color:var(--dim);font-weight:300;transition:color .4s}
.foot .col a:hover{color:var(--porcelain)}
.foot .base{max-width:var(--measure);margin:46px auto 0;padding-top:26px;border-top:1px solid var(--line-soft);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:var(--dimmer)}
.foot .base .r{font-family:var(--serif);font-style:italic;text-transform:none;letter-spacing:0;font-size:15px;color:var(--dim)}
@media(max-width:900px){
  .foot .wrap{flex-direction:column;gap:44px}
  .foot .cols{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:34px 28px}
  .foot .base{margin-top:36px;flex-direction:column;align-items:start;gap:12px;text-align:start}
}
@media(max-width:420px){.foot .cols{grid-template-columns:1fr;gap:30px}}

/* ============================================================
   MOTION SAFETY
   ============================================================ */
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.001s!important}
  html{scroll-behavior:auto}
  .reveal{opacity:1!important;transform:none!important}
  .curtain{display:none!important}
}