/* ==========================================================================
   zubairnabi.com : concrete
   Swiss grid meets Bauhaus. Oversized grotesque, primary blocks, heavy
   rules, nothing decorative.
   ========================================================================== */

:root{
  --wall:#f0efea;
  --slab:#121212;
  --grey:#6a6a63;
  --hair:#c9c8c0;
  --red:#e0402c;
  --blue:#2547c4;
  --yellow:#f2c200;

  --disp:"Syne",Helvetica,Arial,sans-serif;
  --body:"Public Sans",Helvetica,Arial,sans-serif;

  --rail:3.25rem;
  --pad:clamp(1.25rem,4vw,3.5rem);
  --measure:min(58ch,100%);
}

*,*::before,*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  overflow-x:hidden;
}

body{
  margin:0;
  background:var(--wall);
  color:var(--slab);
  font-family:var(--body);
  font-weight:300;
  font-size:clamp(1rem,.96rem+.2vw,1.06rem);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  overflow-wrap:break-word;
}

a{color:inherit}
h1,h2,h3{margin:0;font-family:var(--disp);font-weight:800;line-height:.88;letter-spacing:-.03em}
p{margin:0 0 1em;max-width:var(--measure)}
p:last-child{margin-bottom:0}

.mono{
  font-family:var(--body);font-weight:600;
  font-size:.6875rem;letter-spacing:.16em;text-transform:uppercase;
}

/* --------------------------------------------------------------------------
   Rail: vertical nav at desktop, top bar on small screens
   -------------------------------------------------------------------------- */

.rail{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail);z-index:40;
  border-right:2px solid var(--slab);background:var(--wall);
  display:flex;flex-direction:column;align-items:center;justify-content:space-between;
  padding:1rem 0;
}
.rail__mark{
  font-family:var(--disp);font-weight:800;font-size:1.05rem;letter-spacing:-.04em;
  text-decoration:none;
  writing-mode:horizontal-tb;   /* never inherit the rail's vertical mode */
  text-orientation:mixed;
}
.rail__mark:hover{color:var(--red)}
.rail nav{display:flex;flex-direction:column;gap:1.6rem;align-items:center}
.rail nav a{
  writing-mode:vertical-rl;text-orientation:mixed;text-decoration:none;
  font-size:.6875rem;letter-spacing:.18em;text-transform:uppercase;font-weight:600;
  color:var(--grey);transition:color .18s linear;
}
.rail nav a:hover,
.rail nav a.is-active{color:var(--red)}
.rail__dot{width:12px;height:12px;background:var(--red);border-radius:50%}

@media(max-width:820px){
  .rail{
    right:0;bottom:auto;width:auto;height:3.1rem;flex-direction:row;
    border-right:0;border-bottom:2px solid var(--slab);padding:0 1rem;
    justify-content:space-between;
  }
  .rail nav{flex-direction:row;gap:1.1rem}
  .rail nav a{writing-mode:horizontal-tb;letter-spacing:.1em}
  .rail__dot{display:none}
}
/* six full labels overflow a phone bar, so swap in the short forms */
@media(max-width:620px){
  .rail nav{gap:.9rem}
  .rail nav a{font-size:0;letter-spacing:0}
  .rail nav a::before{
    content:attr(data-short);
    font-size:.625rem;letter-spacing:.08em;
  }
}
@media(max-width:400px){
  .rail nav{gap:.7rem}
  .rail nav a::before{letter-spacing:.03em}
}
/* six rotated labels need more vertical room than a short window has */
@media(min-width:821px) and (max-height:820px){
  .rail nav{gap:1rem}
  .rail nav a{font-size:.625rem;letter-spacing:.12em}
}

.plane{margin-left:var(--rail)}
.pad{padding:0 var(--pad)}
@media(max-width:820px){
  .plane{margin-left:0;padding-top:3.1rem}
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */

.hero{
  min-height:100svh;display:flex;flex-direction:column;justify-content:center;
  padding-top:clamp(4rem,8vw,6rem);padding-bottom:clamp(2.5rem,5vw,4rem);
  overflow:hidden;
}
.hero__kicker{display:flex;gap:1.25rem;align-items:center;margin-bottom:clamp(1.5rem,4vw,2.5rem)}
.hero__kicker .bl{width:2.5rem;height:.8rem;background:var(--blue);flex:none}

.hero h1{
  /* sized to sit just inside the right edge; .hero clips rather than
     scrolls, so this stays a deliberate bleed and not a chopped glyph */
  font-size:clamp(3.4rem,14.5vw,13rem);
  margin-left:-.055em;
}
.hero h1 .l2{display:block;color:var(--red)}

/* three-cell information grid under the headline */
.grid3{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  border-top:2px solid var(--slab);margin-top:clamp(2rem,5vw,3.5rem);
}
.cell{padding:1.5rem 1.5rem 1.5rem 0;border-right:1px solid var(--hair)}
.cell:last-child{border-right:0}
.cell h2{
  font-family:var(--body);font-weight:600;font-size:.6875rem;letter-spacing:.16em;
  text-transform:uppercase;color:var(--grey);margin-bottom:.9rem;
}
.cell p{max-width:32ch}
.cell a:not(.btn){color:var(--slab);text-decoration:none;border-bottom:2px solid var(--red)}
.cell a:not(.btn):hover{background:var(--yellow)}
.cell ul{margin:0;padding:0;list-style:none;display:flex;flex-wrap:wrap;gap:.3rem .8rem}
.cell ul li{font-size:.85rem;color:var(--grey)}
.cell .soc{display:flex;flex-direction:column;gap:.45rem;align-items:flex-start}
.cell .soc a{
  font-weight:600;font-size:.86rem;width:fit-content;
  border-bottom:1px solid var(--hair);
}
.cell .soc a:hover{border-color:var(--slab);background:var(--yellow)}

/* Portrait left in colour: the mural's geometry is why this photo is here.
   The file is already cropped, so no object-fit trickery: shown whole, and
   never rendered wider than its native 558px so it stays sharp. */
.portrait{display:block;width:100%;height:auto;max-width:18rem}

@media(max-width:820px){
  .grid3{grid-template-columns:1fr}
  .cell{border-right:0;border-bottom:1px solid var(--hair);padding-right:0}
  .cell:last-child{border-bottom:0}
}

/* --------------------------------------------------------------------------
   Blocks
   -------------------------------------------------------------------------- */

/* vertical longhands only: the padding shorthand would override the
   horizontal padding .pad sets, leaving content flush against the rail */
.block{
  border-top:2px solid var(--slab);
  padding-top:clamp(2.75rem,6vw,4.5rem);
  padding-bottom:clamp(2.75rem,6vw,4.5rem);
}
.block__head{display:flex;align-items:flex-start;gap:clamp(1rem,3vw,2rem);margin-bottom:2rem}
.block__num{
  font-family:var(--disp);font-weight:800;font-size:clamp(2.2rem,5vw,3.4rem);
  line-height:.8;color:var(--wall);background:var(--slab);
  padding:.2em .3em .1em;flex:none;
}
.block--red    .block__num{background:var(--red)}
.block--blue   .block__num{background:var(--blue)}
.block--yellow .block__num{background:var(--yellow);color:var(--slab)}
.block h2{font-size:clamp(2rem,5vw,3.4rem)}

/* deck: a standfirst under the heading, carrying the voice the bare
   label cannot. Sentence case so it reads as prose, not as a meta label. */
.block__titles{min-width:0}
.deck{
  margin:.75rem 0 0;
  font-size:.95rem;line-height:1.45;color:var(--grey);
  max-width:min(46ch,100%);
}

/* asymmetric block: copy on the left, a tall image in the space to its right */
.block__split{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,18rem);
  gap:clamp(1.5rem,4vw,3.5rem);align-items:start;
}
@media(max-width:900px){.block__split{grid-template-columns:1fr}}

/* a lead paragraph sitting above a row list */
.block__copy + .list{margin-top:2.25rem}

/* status marker, e.g. a book still being written */
.status{
  display:inline-block;margin-bottom:1.1rem;
  padding:.32rem .62rem;background:var(--slab);color:var(--wall);
  font-weight:600;font-size:.625rem;letter-spacing:.16em;text-transform:uppercase;
}
.work__title{
  font-family:var(--disp);font-weight:800;letter-spacing:-.03em;line-height:.95;
  font-size:clamp(1.7rem,1.3rem+1.8vw,2.6rem);margin:0 0 1.1rem;
}

.block__copy{max-width:var(--measure);font-size:1.08rem}
.block__copy p{margin:0 0 1em}
.block__copy a:not(.btn){color:var(--slab);text-decoration:none;border-bottom:2px solid var(--red)}
.block__copy a:not(.btn):hover{background:var(--yellow)}
.block__copy strong{font-weight:600}
.block__copy em{font-style:italic}

/* --------------------------------------------------------------------------
   Heavy grid rows
   -------------------------------------------------------------------------- */

.list{border-top:1px solid var(--hair)}
.row{
  display:grid;grid-template-columns:9rem minmax(0,1fr) 2rem;
  gap:0 clamp(1rem,3vw,2rem);align-items:center;
  padding:1.15rem 0;border-bottom:1px solid var(--hair);
  text-decoration:none;transition:background .18s linear,padding .18s linear,color .18s linear;
}
.row:hover{background:var(--slab);color:var(--wall);padding-left:1rem;padding-right:1rem}
.row__k{font-weight:600;font-size:.6875rem;letter-spacing:.14em;text-transform:uppercase;color:var(--grey)}
.row:hover .row__k{color:var(--yellow)}
.row__t{
  font-family:var(--disp);font-weight:700;
  font-size:clamp(1.15rem,1rem+.7vw,1.6rem);letter-spacing:-.02em;
}
.row__s{
  display:block;font-family:var(--body);font-weight:400;font-size:.78rem;
  letter-spacing:.04em;color:var(--grey);margin-top:.3rem;
}
.row:hover .row__s{color:var(--hair)}
.row__a{justify-self:end;font-weight:600}
.row.soon .row__t{color:var(--grey)}
.row.soon:hover .row__t{color:var(--wall)}

@media(max-width:620px){
  .row{grid-template-columns:minmax(0,1fr) 2rem}
  .row__k{grid-column:1/-1;padding-bottom:.35rem}
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */

.btn{
  display:inline-block;
  padding:.85rem 1.4rem;
  background:var(--slab);color:var(--wall);
  font-weight:600;font-size:.6875rem;letter-spacing:.16em;text-transform:uppercase;
  text-decoration:none;
  transition:background .18s linear,color .18s linear;
}
.btn:hover{background:var(--red);color:var(--wall)}

/* --------------------------------------------------------------------------
   Interior page (teaching)
   -------------------------------------------------------------------------- */

.page-head{
  padding-top:clamp(4rem,9vw,7rem);
  padding-bottom:clamp(2rem,5vw,3.5rem);
}
/* Syne ExtraBold runs ~0.84em per character, so "teaching." needs to stay
   under the measure or the full stop wraps and reads as a stray red block */
.page-head h1{
  font-size:clamp(2.6rem,11.5vw,9.5rem);margin-left:-.055em;
}
.page-head h1 .dot{color:var(--red)}

.back{
  display:inline-block;margin-bottom:clamp(1.5rem,4vw,2.5rem);
  font-weight:600;font-size:.6875rem;letter-spacing:.16em;text-transform:uppercase;
  text-decoration:none;color:var(--grey);
}
.back:hover{color:var(--red)}

.course{padding:clamp(2.5rem,6vw,4.5rem) 0;border-top:1px solid var(--hair)}
.course:first-of-type{border-top:0;padding-top:0}
.course h3{font-size:clamp(1.7rem,1.3rem+2vw,2.9rem);margin-bottom:1.5rem}
.course__body{max-width:var(--measure)}
.course__body p{margin:0 0 1em}
.course__body a:not(.btn){color:var(--slab);text-decoration:none;border-bottom:2px solid var(--red)}
.course__body a:not(.btn):hover{background:var(--yellow)}
.course__body strong{font-weight:600}
.course__body em{font-style:italic}

.subhead{
  display:flex;align-items:center;gap:1rem;
  margin:clamp(2.25rem,5vw,3.25rem) 0 .75rem;
}
.subhead::after{content:"";flex:1;height:2px;background:var(--slab)}

.pullquote{
  margin:clamp(2rem,5vw,3rem) 0;
  padding:0 0 0 clamp(1rem,3vw,1.75rem);
  border-left:6px solid var(--red);
  font-family:var(--disp);font-weight:700;
  font-size:clamp(1.25rem,1.05rem+1vw,1.8rem);line-height:1.22;
  letter-spacing:-.02em;
  max-width:min(30ch,100%);
}
.pullquote footer{
  margin-top:.9rem;font-family:var(--body);font-weight:600;
  font-size:.6875rem;letter-spacing:.16em;text-transform:uppercase;color:var(--grey);
}

/* numbered lecture / project lists */
.numbered{list-style:none;margin:0;padding:0;counter-reset:n}
.numbered li{counter-increment:n}
.numbered a{
  display:grid;grid-template-columns:3rem minmax(0,1fr) 2rem;
  gap:0 clamp(.75rem,2vw,1.5rem);align-items:baseline;
  padding:.95rem 0;border-bottom:1px solid var(--hair);
  text-decoration:none;transition:background .18s linear,padding .18s linear,color .18s linear;
}
.numbered li:first-child a{border-top:1px solid var(--hair)}
.numbered a:hover{background:var(--slab);color:var(--wall);padding-left:1rem;padding-right:1rem}
.numbered a::before{
  content:counter(n,decimal-leading-zero);
  font-weight:600;font-size:.6875rem;letter-spacing:.1em;color:var(--grey);
}
.numbered a:hover::before{color:var(--yellow)}
.numbered a::after{
  content:"↗";font-weight:600;justify-self:end;color:var(--hair);
}
.numbered a:hover::after{color:var(--wall)}
.numbered .t{font-weight:400;line-height:1.4}
.numbered .t em{
  display:block;font-style:normal;font-weight:600;
  font-size:.6875rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--grey);margin-top:.3rem;
}
.numbered a:hover .t em{color:var(--hair)}

@media(max-width:560px){
  .numbered a{grid-template-columns:2.25rem minmax(0,1fr) 1.25rem}
}

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */

.base{
  border-top:2px solid var(--slab);
  padding-top:1.5rem;padding-bottom:2.5rem;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:1rem;
}
.base a{text-decoration:none}
.base a:hover{color:var(--red)}

/* --------------------------------------------------------------------------
   Motion
   -------------------------------------------------------------------------- */

.reveal{
  opacity:0;transform:translateY(14px);
  transition:opacity .7s ease,transform .7s cubic-bezier(.22,1,.36,1);
}
.reveal.in{opacity:1;transform:none}

.rise{opacity:0;transform:translateY(14px);animation:rise .8s cubic-bezier(.22,1,.36,1) forwards}
.rise-1{animation-delay:.04s}
.rise-2{animation-delay:.14s}
.rise-3{animation-delay:.26s}
@keyframes rise{to{opacity:1;transform:none}}

::selection{background:var(--yellow);color:var(--slab)}
:focus-visible{outline:3px solid var(--blue);outline-offset:2px}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  .rise,.reveal{opacity:1;transform:none}
}