/* khalid.studio — Artisanal palette */
:root{
  --bg:#F3ECE0; --surface:#EADFCC; --ink:#2B211A; --muted:#67574A; --line:#DACDB7; --tile:#E4D6BF;
  --accent:#1F4D3A; --on-accent:#F3ECE0; --hl:#86672A; --logo:#1F4D3A;
  --band:#2B211A; --band-ink:#F3ECE0; --band-muted:#CDBBA2;
  --display:'Instrument Serif',Georgia,serif; --body:'Hanken Grotesk',system-ui,sans-serif; --mono:'JetBrains Mono',ui-monospace,monospace;
  --pad:clamp(16px,5.5vw,80px); --max:1280px;
}
html[lang="ar"]{ --display:'Amiri',serif; --body:'IBM Plex Sans Arabic',system-ui,sans-serif; }
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);font-size:17px;line-height:1.6}
img{display:block;max-width:100%}
a{color:inherit}
a:hover{opacity:.8}
.wrap{max-width:calc(var(--max) + 2*var(--pad));margin:0 auto;padding-inline:var(--pad)}
.eyebrow{font-family:var(--mono);font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--hl)}
html[lang="ar"] .eyebrow{font-family:var(--body);letter-spacing:0;text-transform:none;font-size:16px;font-weight:600}
.mono{font-family:var(--mono)}
h1,h2,h3{font-family:var(--display);font-weight:400;margin:0}
html[lang="ar"] h1,html[lang="ar"] h2,html[lang="ar"] h3{font-weight:700}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:0 28px;border-radius:999px;text-decoration:none;font-weight:600;font-size:17px;border:1px solid var(--ink)}
.btn--solid{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}

/* Header */
.site-header{border-bottom:1px solid var(--line);position:sticky;top:0;background:var(--bg);z-index:10}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:80px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.brand svg{width:40px;height:40px}
.brand span{font-family:var(--mono);font-size:15px;font-weight:500}
.nav{display:flex;align-items:center;gap:32px;font-weight:500}
.nav a{text-decoration:none;padding:10px 0}
.nav .pill{padding:10px 20px;border:1px solid var(--ink);border-radius:999px}
.nav .lang{color:var(--muted)}
.menu-btn{display:none;width:44px;height:44px;border-radius:999px;border:1px solid var(--line);background:transparent;color:var(--ink);cursor:pointer;align-items:center;justify-content:center}

/* Hero */
.hero{padding-block:clamp(32px,6vw,72px) 0}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.85fr);gap:clamp(24px,5vw,64px);align-items:stretch}
.hero-copy{display:flex;flex-direction:column;justify-content:space-between;gap:32px;padding-block:16px}
.hero h1{font-size:clamp(50px,7.8vw,112px);line-height:.98;letter-spacing:-.02em}
html[lang="ar"] .hero h1{line-height:1.35;letter-spacing:0;font-size:clamp(48px,6.8vw,96px)}
.hero h1 em{color:var(--hl)}
html[lang="ar"] .hero h1 em{font-style:normal}
.quote{margin:0;padding-inline-start:20px;border-inline-start:2px solid var(--hl);max-width:600px}
.quote p{margin:0;font-family:var(--display);font-size:clamp(22px,2.2vw,30px);line-height:1.5;color:var(--ink)}
html[lang="en"] .quote p{font-style:italic}
.quote cite{display:block;margin-top:10px;font-style:normal;font-size:15px;color:var(--muted)}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.disciplines{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:24px;border-top:1px solid var(--ink);margin-top:clamp(48px,7vw,88px);padding-top:24px}
.disciplines div{display:flex;flex-direction:column;gap:6px}
.disciplines b{font-family:var(--mono);font-weight:400;font-size:13px;color:var(--hl)}
.disciplines h3{font-size:30px;line-height:1.2}
.disciplines p{margin:0;font-size:15px;color:var(--muted);line-height:1.6}

/* Photos: tinted, true colour on hover */
.photo{position:relative;overflow:hidden;background:var(--tile)}
.photo img{width:100%;height:100%;object-fit:cover;filter:grayscale(1) sepia(.55) contrast(.95) brightness(.97);transition:filter .6s ease,transform .8s ease}
.photo::after{content:"";position:absolute;inset:0;background:var(--hl);mix-blend-mode:multiply;opacity:.28;transition:opacity .6s ease;pointer-events:none}
.photo:hover img,.photo:focus-within img,.photo.is-live img{filter:none;transform:scale(1.02)}
.photo:hover::after,.photo:focus-within::after,.photo.is-live::after{opacity:0}
@media (prefers-reduced-motion:reduce){.photo img,.photo::after{transition:none}.photo:hover img{transform:none}}

.hero-photo{min-height:clamp(420px,46vw,660px)}

/* Gallery */
.work{padding-block:clamp(72px,9vw,136px) clamp(64px,8vw,120px)}
.work-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:40px}
.work-head h2{font-size:clamp(44px,5vw,72px);line-height:1.1;margin-top:10px}
.work-head .summary{color:var(--muted);margin-top:6px}
.filters{display:flex;gap:8px;flex-wrap:wrap}
.filters button{min-height:44px;padding:0 18px;border-radius:999px;border:1px solid var(--line);background:transparent;color:var(--ink);font:500 15px/1 var(--body);cursor:pointer}
.filters button[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:var(--bg)}
.filters button span{opacity:.6;font-family:var(--mono);font-size:12px;margin-inline-start:4px}
.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-auto-rows:clamp(180px,20vw,280px);grid-auto-flow:dense;gap:16px}
.grid figure{margin:0}
.grid figure[hidden]{display:none}
.grid .photo{height:100%}
.tile.big{grid-column:span 2;grid-row:span 2}
.tile.wide{grid-column:span 2}
.tile.tall{grid-row:span 2}

/* Logo strip */
.strip{height:64px;background-color:var(--logo);background-image:url("../logo-mark-white.svg");background-size:64px 64px;background-repeat:repeat-x;background-position:center}

/* About */
.about{background:var(--surface);padding-block:clamp(64px,9vw,120px)}
.about .wrap{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1fr);gap:clamp(32px,7vw,96px);align-items:center}
.about .photo{aspect-ratio:7/8}
.about h2{font-size:clamp(40px,4.6vw,64px);line-height:1.05;margin-block:18px 24px}
html[lang="ar"] .about h2{line-height:1.4}
.about h2 em{color:var(--hl)}
html[lang="ar"] .about h2 em{font-style:normal}
.about p{color:var(--muted);font-size:clamp(17px,1.4vw,19px);margin:0;max-width:620px}
html[lang="ar"] .about p{line-height:1.9}
.principles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;border-top:1px solid var(--line);padding-top:24px;margin-top:32px}
.principles b{display:block;font-family:var(--mono);font-weight:400;font-size:13px;color:var(--hl)}
.principles strong{display:block;margin-block:6px 4px}
.principles span{font-size:15px;color:var(--muted)}

/* Calculator band */
.calc{position:relative;overflow:hidden;background:var(--band);color:var(--band-ink);padding-block:clamp(56px,7vw,96px)}
.calc::before{content:"";position:absolute;inset:0;background-image:url("../logo-mark-white.svg"),url("../logo-mark-white.svg");background-size:48px 48px;background-position:0 0,48px 48px;background-repeat:repeat;background-origin:border-box;opacity:.07;pointer-events:none}
.calc .wrap{position:relative;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,440px);gap:clamp(32px,6vw,80px);align-items:center}
.calc .eyebrow{color:var(--band-muted)}
.calc-title{display:flex;align-items:baseline;gap:24px;flex-wrap:wrap;margin-block:16px}
.calc-title .ar{font-family:'IBM Plex Sans Arabic',sans-serif;font-weight:700;font-size:clamp(60px,6vw,96px);line-height:1.15}
.calc-title .sub{font-family:var(--display);font-style:italic;font-size:clamp(26px,3vw,44px);color:var(--band-muted)}
html[lang="ar"] .calc-title .sub{font-style:normal}
.calc p{color:var(--band-muted);max-width:640px;margin:0 0 28px;font-size:clamp(16px,1.4vw,19px)}
.calc .btn{background:var(--band-ink);color:var(--band);border-color:var(--band-ink)}
.calc .photo{aspect-ratio:4/3;background:#3a2e25}

/* Footer */
.contact{padding-block:clamp(64px,9vw,120px) 40px}
.contact-top{display:flex;justify-content:space-between;align-items:flex-end;gap:48px;flex-wrap:wrap}
.contact h2{font-size:clamp(44px,5.5vw,80px);line-height:1.15;margin-block:14px}
.contact p{color:var(--muted);margin:0}
.links{min-width:min(420px,100%);display:flex;flex-direction:column}
.links .dm{border-bottom:0;justify-content:center;margin-bottom:8px;font-size:17px;color:var(--on-accent)}
.links a{display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:60px;border-bottom:1px solid var(--line);text-decoration:none;font-size:19px}
.links a span:first-child{font-size:14px;color:var(--muted)}
.foot{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;border-top:1px solid var(--line);margin-top:72px;padding-top:24px;font-size:14px;color:var(--muted)}
.foot .brand svg{width:24px;height:24px}
.foot nav{display:flex;gap:24px;flex-wrap:wrap}
.foot nav a{text-decoration:none}

/* Responsive */
@media (max-width:900px){
  .nav{display:none}
  .menu-btn{display:flex}
  .site-header.open .nav{display:flex;position:absolute;top:80px;inset-inline:0;flex-direction:column;align-items:stretch;gap:0;background:var(--bg);border-bottom:1px solid var(--line);padding:8px var(--pad) 16px}
  .site-header.open .nav a{padding:14px 0;border-bottom:1px solid var(--line)}
  .site-header.open .nav .pill{border:0;border-radius:0;padding:14px 0}
  .hero-grid,.about .wrap,.calc .wrap{grid-template-columns:1fr}
  .hero-photo{aspect-ratio:4/5;min-height:0}
  .disciplines{grid-template-columns:1fr;gap:0}
  .disciplines div{flex-direction:row;align-items:baseline;gap:14px;padding:14px 0;border-bottom:1px solid var(--line)}
  .disciplines h3{font-size:24px;flex-grow:1}
  .disciplines p{font-size:14px;text-align:end;max-width:50%}
  .grid{grid-template-columns:repeat(2,minmax(0,1fr));grid-auto-rows:44vw;gap:10px}
  .principles{grid-template-columns:1fr}
  .strip{height:40px;background-size:40px 40px}
}
@media (max-width:600px){
  .site-header .wrap{height:64px}
  .site-header.open .nav{top:64px}
  .brand svg{width:32px;height:32px}
  .hero-actions .btn{flex:1 1 100%}
  .filters{flex-wrap:nowrap;overflow-x:auto;margin-inline-end:calc(-1*var(--pad));padding-bottom:4px}
  .filters button{flex-shrink:0}
}