:root{
  --bg:#000000;
  --fg:#ffffff;
  --muted:rgba(255,255,255,.48);
  --soft:rgba(255,255,255,.12);
  --soft-2:rgba(255,255,255,.08);
  --gap-x:16px;
  --gap-y:24px;
  --header-pad:16px;
  --ui: Arial, Helvetica, sans-serif;
  --display: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --maxw: 1600px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--fg);
  font-family:var(--display);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button{font:inherit}

.page{
  width:100%;
}

.container{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
}

/* HEADER */
.site-header{
  position:fixed;
  inset:0 16px auto;
  z-index:100;
  padding:22px var(--header-pad);
  mix-blend-mode:difference;
  pointer-events:none;
}

.site-nav{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  width:100%;
  pointer-events:auto;
  text-transform:uppercase;
  font-family:var(--ui);
  font-size:12px;
  letter-spacing:.08em;
}

.nav-left{justify-self:start}
.nav-center{justify-self:center}
.nav-right{justify-self:end}

.brand{
  font-weight:700;
  font-size: 3rem;
  letter-spacing:0em;
  white-space:nowrap;
}

.nav-link,
.brand{
  position:relative;
  display:inline-block;
}

.nav-link::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-4px;
  width:100%;
  height:1px;
  background:var(--fg);
  transform:scaleX(0);
  transform-origin:right;
  transition:transform .28s ease;
}

.nav-link:hover::after{
  transform:scaleX(1);
  transform-origin:left;
}

.nav-sep{
  display:inline-block;
  margin:0 8px;
  color:var(--muted);
  pointer-events:none;
}

/* HERO SPACE */
.top-space{
  height:108px;
}

/* FILTERS */
.filters{
  padding:0 16px 24px;
  display:flex;
  flex-direction:column;
  gap:6px;
  text-transform:uppercase;
  font-family:var(--ui);
  font-size:12px;
  letter-spacing:.08em;
}

.filter-btn{
  border:0;
  background:transparent;
  color:var(--muted);
  cursor:pointer;
  text-align:left;
  width:max-content;
  transition:color .24s ease, opacity .24s ease;
}

.filter-btn:hover,
.filter-btn.active{
  color:var(--fg);
}

/* GRID */
.projects-wrap{
  padding:0 16px;
}

.projects{
  display:grid;
  grid-template-columns:repeat(4, minmax(0,1fr));
  gap:var(--gap-y) var(--gap-x);
  align-items:start;
}

.project{
  transition:opacity .3s ease, transform .3s ease;
  will-change:transform, opacity;
}

.project.is-hidden{
  display:none;
}

.project.big{
  grid-column:span 2;
  grid-row:span 2;
}

.project-link{
  display:block;
  width:100%;
}

.project-head{
  display:flex;
  gap:14px;
  align-items:flex-start;
  margin-bottom:10px;
  text-transform:uppercase;
  font-family:var(--ui);
  font-size:12px;
  line-height:1.35;
  letter-spacing:.06em;
}

.project-index{
  min-width:28px;
  opacity:.92;
  flex:0 0 auto;
}

.project-title{
  display:block;
}

.project-media{
  position:relative;
  overflow:hidden;
  width:100%;
  background:#111;
  aspect-ratio:16/10;
}

.project.big .project-media{
  aspect-ratio:16/10;
}

.project-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(to top, rgba(0,0,0,.18), rgba(0,0,0,0));
  pointer-events:none;
  z-index:2;
}

.project-media img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .8s cubic-bezier(.2,.6,.2,1), opacity .4s ease;
}

.project-media .hover-img{
  opacity:0;
}

.project:hover .base-img{
  opacity:0;
  transform:scale(1.035);
}

.project:hover .hover-img{
  opacity:1;
  transform:scale(1.035);
}

.project-note{
  margin-top:10px;
  margin-left:42px;
  max-width:90%;
  color:rgba(255,255,255,.82);
  font-family:var(--ui);
  font-size:12px;
  line-height:1.45;
  text-transform:uppercase;
  letter-spacing:.04em;
}

.empty-state{
  display:none;
  padding:12px 0 0;
  color:var(--muted);
  font-family:var(--ui);
  font-size:12px;
  text-transform:uppercase;
  letter-spacing:.08em;
}

.empty-state.show{
  display:block;
}

/* FOOTER ACTION */
.back-top{
  display:flex;
  justify-content:center;
  padding:72px 16px 40px;
  text-transform:uppercase;
  font-family:var(--ui);
  font-size:12px;
  letter-spacing:.08em;
}

.back-link{
  position:relative;
  display:inline-block;
  opacity:1;
  transition:opacity .2s ease;
}

.back-link:hover{opacity:.65}

.back-link::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-4px;
  width:100%;
  height:1px;
  background:#fff;
  transform:scaleX(0);
  transform-origin:right;
  transition:transform .28s ease;
}

.back-link:hover::after{
  transform:scaleX(1);
  transform-origin:left;
}

/* SMALL INFO ANCHORS */
.anchor-sections{
  display:none;
}

/* RESPONSIVE */
@media (max-width: 980px){
  .projects{
    grid-template-columns:repeat(2, minmax(0,1fr));
    gap:18px 10px;
  }

  .project.big{
    grid-column:span 2;
  }

  .site-nav,
  .filters,
  .project-head,
  .project-note,
  .back-top,
  .empty-state{
    font-size:13px;
  }

  .project-note{
    margin-left:38px;
  }
}

@media (max-width: 640px){
  .top-space{
    height:112px;
  }

  .site-header{
    padding:18px 0px;
  }

  .site-nav{
    grid-template-columns:1fr 1fr;
    grid-template-areas:
      "center center"
      "left   right";
    row-gap:8px;
  }

  .nav-left{
    grid-area:left;
    justify-self:start;
  }

  .nav-center{
    grid-area:center;
    justify-self:center;
    padding-left:0;
  }

  .nav-right{
    grid-area:right;
    justify-self:end;
  }

  .brand{
    font-size:13px;
  }

  .nav-link{
    font-size:10px;
  }

  .nav-sep{
    margin:0 5px;
  }

  .projects{
    grid-template-columns:1fr;
  }

  .project.big{
    grid-column:span 1;
  }

  .project-note{
    margin-left:0;
    max-width:100%;
  }

  .project-title{
    max-width:none;
  }
}