/* Atropos Institute — single-file theme
   Drop into /styles.css. Works with the included hero images in /assets.
*/

:root{
  --bg: #f5f7fb;
  --panel: #ffffff;
  --text: #0f1722;
  --muted: #4a5968;
  --line: rgba(15,23,34,.12);
  --shadow: rgba(2, 10, 22, .08);
  --shadow2: rgba(2, 10, 22, .12);
  --radius: 16px;
  --max: 1100px;

  --navH: 78px;
  --heroH: clamp(220px, 34vw, 360px);

  --btnBg: rgba(15,23,34,.06);
  --btnBgHover: rgba(15,23,34,.10);
  --primary: #2f4f77;
  --primaryHover: #264363;
}

@media (prefers-color-scheme: dark){
  :root{
    --bg: #0b0f14;
    --panel: #0f141b;
    --text: #e9edf2;
    --muted: #aab6c4;
    --line: rgba(233,237,242,.12);
    --shadow: rgba(0,0,0,.35);
    --shadow2: rgba(0,0,0,.55);

    --btnBg: rgba(233,237,242,.08);
    --btnBgHover: rgba(233,237,242,.12);
    --primary: #6c86ab;
    --primaryHover: #5f789a;
  }
}

*{ box-sizing: border-box; }
html, body{ height: 100%; }
body{
  margin: 0;
  color: var(--text);
  background: radial-gradient(1100px 520px at 18% 0%, rgba(47,79,119,.18), transparent 60%),
              radial-gradient(900px 520px at 85% 10%, rgba(47,79,119,.10), transparent 55%),
              var(--bg);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.5;
}

img{ max-width: 100%; display: block; }

.container{
  width: min(var(--max), calc(100% - 36px));
  margin-inline: auto;
}

.site-header{
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in oklab, var(--panel) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.header-inner{
  min-height: var(--navH);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand{
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.mark{
  width: 38px;
  height: 38px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,.14), rgba(255,255,255,.03));
  box-shadow: 0 14px 36px var(--shadow);
  position: relative;
  overflow: hidden;
}
.mark:after{
  content:"";
  position:absolute;
  inset:-30%;
  background: conic-gradient(from 200deg, transparent 0 55%, rgba(255,255,255,.16) 55% 72%, transparent 72% 100%);
  transform: rotate(10deg);
}

.brand-text{ display: grid; gap: 2px; }
.brand-name{ font-weight: 720; letter-spacing: .2px; }
.brand-tag{ font-size: 12px; color: var(--muted); }

.nav{
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav a{
  text-decoration: none;
  color: var(--muted);
  font-size: 14px;
  padding: 10px 12px;
  border-radius: 12px;
}
.nav a:hover{
  background: color-mix(in oklab, var(--text) 6%, transparent);
  color: var(--text);
}

.hero{
  position: relative;
  height: var(--heroH);
  min-height: 220px;
  overflow: hidden;
}

.hero-media{
  position: absolute;
  inset: 0;
}
.hero-media img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.02) contrast(1.02);
  transform: scale(1.02);
}
.hero-overlay{
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(5,10,16,.60), rgba(5,10,16,.20) 55%, rgba(5,10,16,.10));
}
@media (prefers-color-scheme: dark){
  .hero-overlay{
    background: linear-gradient(90deg, rgba(0,0,0,.65), rgba(0,0,0,.25) 55%, rgba(0,0,0,.12));
  }
}

.hero-content{
  position: relative;
  height: 100%;
  display: grid;
  align-content: center;
  padding: 26px 0;
}
.hero h1{
  margin: 0 0 6px;
  font-size: clamp(34px, 4vw, 54px);
  letter-spacing: .2px;
  color: #fff;
  text-shadow: 0 14px 40px rgba(0,0,0,.35);
}
.hero-sub{
  margin: 0;
  max-width: 70ch;
  color: rgba(255,255,255,.88);
  font-size: 16px;
}

.content{
  padding: 26px 0 34px;
}

.grid{
  display: grid;
  grid-template-columns: 1.35fr .65fr;
  gap: 18px;
  align-items: start;
}
@media (max-width: 920px){
  .grid{ grid-template-columns: 1fr; }
}

.card{
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 18px 60px var(--shadow);
  overflow: hidden;
}

.card--mission{
  display: grid;
  grid-template-columns: 1.1fr .9fr;
}
@media (max-width: 920px){
  .card--mission{ grid-template-columns: 1fr; }
}

.card-body{
  padding: 22px;
}
.card-body p{ margin: 0 0 14px; font-size: 16px; }
.card-body p.muted{ color: var(--muted); margin-top: 4px; }

.actions{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
}

.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--btnBg);
  text-decoration: none;
  color: var(--text);
  font-size: 14px;
}
.btn:hover{ background: var(--btnBgHover); }

.btn--primary{
  background: var(--primary);
  border-color: color-mix(in oklab, var(--primary) 80%, var(--line));
  color: #fff;
  font-weight: 650;
}
.btn--primary:hover{ background: var(--primaryHover); }

.card-media{
  position: relative;
  min-height: 260px;
}
.card-media img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.02) contrast(1.04);
}
.card-media:after{
  content:"";
  position:absolute;
  inset:0;
  background: linear-gradient(180deg, transparent 0%, rgba(0,0,0,.25) 55%, rgba(0,0,0,.45));
}

.card--resources{
  padding: 18px;
}
.card-title{
  margin: 2px 2px 12px;
  font-size: 18px;
  letter-spacing: .2px;
}

.resource{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: color-mix(in oklab, var(--text) 3%, transparent);
  text-decoration: none;
  color: var(--text);
  margin-bottom: 10px;
}
.resource:hover{
  background: color-mix(in oklab, var(--text) 6%, transparent);
}

.resource-left{
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.icon{
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: color-mix(in oklab, var(--text) 6%, transparent);
  border: 1px solid var(--line);
  font-size: 14px;
}

.resource-label{
  font-size: 14px;
  font-weight: 620;
  letter-spacing: .1px;
}
.chev{
  color: var(--muted);
  font-size: 20px;
  margin-top: -2px;
}

.small-note{
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

.site-footer{
  border-top: 1px solid var(--line);
  padding: 18px 0;
  background: color-mix(in oklab, var(--panel) 92%, transparent);
}
.footer-inner{
  display: flex;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 12px;
}
.footer-fine{
  max-width: 86ch;
}


/* --- Hero background variant (crisper than <img> based hero) --- */
.hero--bg{
  position: relative;
  background-image: linear-gradient(90deg, rgba(5,10,16,.62), rgba(5,10,16,.26) 55%, rgba(5,10,16,.14)),
                    var(--hero-bg);
  background-size: cover;
  background-position: center;
}
@media (prefers-color-scheme: dark){
  .hero--bg{
    background-image: linear-gradient(90deg, rgba(0,0,0,.70), rgba(0,0,0,.30) 55%, rgba(0,0,0,.16)),
                      var(--hero-bg);
  }
}
.hero-actions{ display:flex; gap:10px; flex-wrap:wrap; margin-top:14px; }
.hero-fade{
  position:absolute;
  left:0; right:0; bottom:0;
  height: 88px;
  background: linear-gradient(180deg, transparent 0%, color-mix(in oklab, var(--bg) 85%, transparent) 65%, var(--bg) 100%);
  pointer-events:none;
}
.section-title{
  margin: 0 0 10px;
  font-size: 18px;
  letter-spacing: .2px;
}
.card--mission .card-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}