@import url("tokens.css");

*{box-sizing:border-box}
html,body{height:100%}

body{
  margin:0;
  font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,"Noto Sans","Liberation Sans",sans-serif;
  font-size:var(--fs-body);
  line-height:var(--lh-body);
  background:var(--bg);
  color:var(--fg);
}

a{color:var(--fg);text-decoration:none}
a:hover{text-decoration:underline}

.wrap,
.page{min-height:100vh}

.page{
  position:relative;
  overflow:hidden;
  display:flex;
  flex-direction:column;
}

.page.research-sources-page::before{
  content:"";
  position:absolute;
  inset:0;
  background:url("backgrounds/research-projects-bg.webp") center/cover no-repeat;
  filter:brightness(.72) contrast(1.08) saturate(.88);
  transform:scale(1.02);
  z-index:0;
}

.page.research-sources-page::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,
    rgba(11,11,13,.88) 0%,
    rgba(11,11,13,.70) 34%,
    rgba(11,11,13,.46) 62%,
    rgba(11,11,13,.28) 82%,
    rgba(11,11,13,.18) 100%);
  z-index:1;
}

.site-header{
  position:relative;
  z-index:2;
  padding:22px 44px 0;
  text-align:right;
}

.site-header .brand{
  margin:0 0 6px;
  letter-spacing:.22em;
  text-transform:uppercase;
  font-size:var(--fs-body);
  font-weight:600;
  line-height:var(--lh-body);
  opacity:.92;
}

.site-header .menu{
  font-size:var(--fs-kicker);
  line-height:var(--lh-kicker);
  color:var(--muted);
}

.site-header .menu a{
  margin:0 10px;
  color:var(--muted);
}

.site-header .menu a:first-child{margin-left:0}
.site-header .menu a:last-child{margin-right:0}

.site-header .menu a:hover{
  color:var(--fg);
  text-decoration:none;
}

.main{
  position:relative;
  z-index:2;
  flex:1;
  display:flex;
  align-items:center;
}

.content{
  width:100%;
  max-width:980px;
  padding:28px 44px 56px;
}

.h1{
  margin:0 0 10px;
  font-size:var(--fs-h1-static);
  font-weight:600;
}

.lead{
  max-width:74ch;
  margin:0 0 16px;
  font-size:var(--fs-lead);
  line-height:var(--lh-lead);
  color:var(--muted);
}

.source-list{
  margin-top:18px;
  display:grid;
  gap:16px;
}

.source-card{
  padding:18px;
  border:1px solid rgba(242,242,244,.13);
  border-radius:18px;
  background:rgba(0,0,0,.20);
  backdrop-filter:blur(5px);
}

.source-card h2{
  margin:0 0 10px;
  font-size:var(--fs-h2);
  line-height:1.22;
}

.source-card p{
  max-width:86ch;
  margin:0 0 12px;
  font-size:var(--fs-body);
  line-height:var(--lh-body);
  color:var(--muted);
}

.source-card p:last-child{margin-bottom:0}

.source-card p.source-kicker{
  margin:0 0 8px;
  font-size:var(--fs-kicker);
  line-height:var(--lh-kicker);
  letter-spacing:.09em;
  text-transform:uppercase;
  color:rgba(242,242,244,.52);
}

.source-card p.source-note{
  padding-left:14px;
  border-left:2px solid rgba(242,242,244,.22);
  color:rgba(242,242,244,.78);
}

.bibliography{
  margin-top:26px;
  padding-top:18px;
  border-top:1px solid rgba(242,242,244,.12);
}

.bibliography h2{
  margin:0 0 10px;
  font-size:var(--fs-h2);
  line-height:1.22;
}

.bibliography ul{
  max-width:90ch;
  margin:0;
  padding-left:18px;
  font-size:var(--fs-body);
  line-height:var(--lh-body);
  color:var(--muted);
}

.nav-row{
  margin-top:24px;
  display:flex;
  gap:10px;
  flex-wrap:wrap;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:10px 14px;
  border:1px solid rgba(242,242,244,.16);
  border-radius:999px;
  background:rgba(255,255,255,.04);
  font-size:var(--fs-kicker);
  line-height:var(--lh-kicker);
  font-weight:700;
  color:var(--fg);
  text-decoration:none;
}

.btn:hover{
  border-color:rgba(242,242,244,.34);
  background:rgba(255,255,255,.08);
  text-decoration:none;
}

.seal{
  margin-top:18px;
  display:flex;
  align-items:center;
  gap:10px;
  font-size:var(--fs-kicker);
  line-height:var(--lh-kicker);
  color:var(--muted);
}

.seal img{
  width:auto;
  height:22px;
  opacity:.75;
}

@media(max-width:900px){
  .site-header{padding:16px 22px 0}
  .main{align-items:flex-start}
  .content{padding:22px 22px 44px}

  .page.research-sources-page::before{background-position:center center}

  .page.research-sources-page::after{
    background:linear-gradient(90deg,
      rgba(11,11,13,.90) 0%,
      rgba(11,11,13,.76) 48%,
      rgba(11,11,13,.48) 100%);
  }
}