:root{
  --oxy-red: oklch(60% 0.22 25);
  --deoxy-blue: oklch(60% 0.22 250);
  --capillary-purple: oklch(70% 0.12 320);

  --ink-100: oklch(95% 0 0);
  --ink-300: oklch(85% 0 0);
  --ink-600: oklch(45% 0 0);
  --ink-900: oklch(20% 0 0);

  --bg-0: oklch(99% 0 0);
  --bg-1: oklch(98% 0 0);
  --bg-2: oklch(96% 0 0);
  --bg-3: oklch(93% 0 0);

  --text-0: var(--ink-900);
  --text-1: var(--ink-600);

  --accent-1: var(--oxy-red);
  --accent-2: var(--deoxy-blue);

  --radius: 16px;
  --shadow: 0 6px 24px color-mix(in oklab, var(--ink-900) 10%, transparent);
  --border: 1px solid color-mix(in oklab, currentColor 10%, transparent);
  --glass-bg: color-mix(in oklab, var(--bg-0) 35%, transparent);
  --glass-border-color: color-mix(in oklab, var(--text-0) 14%, transparent);
  --glass-shadow: 0 22px 48px color-mix(in srgb, black 12%, transparent);
}

@media (prefers-color-scheme: dark){
  :root{
    --bg-0: oklch(16% 0.02 270);
    --bg-1: oklch(18% 0.02 270);
    --bg-2: oklch(22% 0.02 270);
    --bg-3: oklch(26% 0.02 270);
    --text-0: oklch(95% 0 0);
    --text-1: oklch(85% 0 0);
    --shadow: 0 6px 24px color-mix(in oklab, black 50%, transparent);
    --glass-bg: color-mix(in oklab, var(--bg-0) 18%, transparent);
    --glass-border-color: color-mix(in oklab, var(--text-0) 24%, transparent);
    --glass-shadow: 0 26px 50px color-mix(in srgb, black 35%, transparent);
  }
}

/* ------------------------------
   Base
   ------------------------------ */
html,body{
  margin:0; padding:0;
  background:
    linear-gradient(160deg, rgba(255,255,255,0.82) 0%, rgba(255,255,255,0.7) 32%, rgba(255,255,255,0.62) 55%, rgba(255,255,255,0.74) 100%),
    url("../img/cassian-pas-full.png");
  background-attachment: fixed;
  background-size: cover;
  background-position: center 38%;
  color:var(--text-0);
  font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,"Helvetica Neue",Arial,"Noto Sans","Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";
}
img,svg,video{max-width:100%;height:auto}
a{color:color-mix(in oklab, var(--accent-1) 60%, var(--accent-2) 40%);text-decoration-thickness:.08em}
a:hover{color:var(--accent-2)}

.container{width:min(1100px, 92vw);margin-inline:auto}
.grid{display:grid}
.gap-xl{gap:2rem}
.measure{max-width:68ch}
.prose p{margin:0 0 1rem}
.prose h1,.prose h2,.prose h3{margin-top:2rem}
.display{font-size:clamp(2rem,4vw+1rem,3.5rem);line-height:1.15;margin:0 0 .5rem}
.lead{font-size:1.1rem;color:var(--text-1)}
.stack>*+*{margin-top:1rem}
.mt-0{margin-top:0}
.h3{font-size:1.4rem;margin:.5rem 0 1rem}
.h5{font-size:1.05rem}

/* Buttons */
.btn{
  --btn-border-color: color-mix(in oklab, var(--text-0) 10%, transparent);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.4rem;
  padding:.44rem .85rem;
  border-radius:999px;
  border:1px solid var(--btn-border-color);
  text-decoration:none;
  font-weight:500;
  font-size:.95rem;
  color:var(--text-0);
  background:color-mix(in oklab, var(--bg-0) 45%, transparent);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:0 12px 24px color-mix(in srgb, black 8%, transparent);
  transition:transform .18s ease, box-shadow .18s ease, color .18s ease;
}
.btn::after{content:"";display:inline-block;width:.65em;height:.65em;background:linear-gradient(120deg, var(--deoxy-blue), var(--oxy-red));border-radius:50%;opacity:.2;transition:opacity .18s ease}
.btn:hover{
  transform:translateY(-1px);
  box-shadow:0 18px 38px color-mix(in srgb, black 14%, transparent);
}
.btn:hover::after{opacity:.55}
.btn-primary,
.btn-subtle,
.btn-link{
  border:none;
  color:white;
  background:linear-gradient(100deg, var(--deoxy-blue), var(--capillary-purple), var(--oxy-red));
  box-shadow:0 20px 40px color-mix(in srgb, var(--deoxy-blue) 32%, transparent);
}
.btn-link{padding:.44rem .85rem}
.btn:focus-visible{outline:2px solid color-mix(in oklab, var(--accent-1) 60%, var(--accent-2) 40%);outline-offset:3px}

/* Badges & cards */
.badge{display:inline-block;padding:.15rem .5rem;border-radius:999px;background:var(--bg-3);border:var(--border);font-size:.8rem}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1rem}
.card{
  background:var(--glass-bg);
  backdrop-filter:blur(18px) saturate(160%);
  -webkit-backdrop-filter:blur(18px) saturate(160%);
  border:1px solid var(--glass-border-color);
  border-radius:var(--radius);
  padding:1rem;
  box-shadow:var(--glass-shadow);
  transition:transform .2s ease, box-shadow .2s ease, outline-color .2s
}

.card.talk{position:relative;padding-right:2.75rem}
.card.talk .talk-card-icon{
  position:absolute;
  top:.85rem;
  right:.85rem;
  display:flex;
  align-items:center;
  justify-content:center;
  width:2.6rem;
  height:2.6rem;
  border-radius:50%;
  background:color-mix(in oklab, var(--bg-0) 35%, transparent);
  backdrop-filter:blur(12px) saturate(150%);
  -webkit-backdrop-filter:blur(12px) saturate(150%);
  border:1px solid var(--glass-border-color);
  box-shadow:0 10px 24px color-mix(in srgb, black 12%, transparent);
  color:color-mix(in oklab, var(--accent-1) 55%, var(--capillary-purple) 45%);
}
.card.talk .talk-card-icon[data-type="poster"]{
  color:color-mix(in oklab, var(--deoxy-blue) 60%, var(--capillary-purple) 40%);
}
.card.talk .talk-card-icon svg{width:1.15rem;height:1.15rem}

.glass-panel{
  background:var(--glass-bg);
  border:1px solid var(--glass-border-color);
  border-radius:var(--radius);
  padding:clamp(1.25rem, 2.6vw, 2rem);
  box-shadow:var(--glass-shadow);
  backdrop-filter:blur(20px) saturate(160%);
  -webkit-backdrop-filter:blur(20px) saturate(160%);
  position:relative;
}
.glass-panel>*:first-child{margin-top:0}
.glass-panel>*:last-child{margin-bottom:0}
.glass-section{
  display:flex;
  flex-direction:column;
  gap:clamp(1rem,2vw,1.6rem);
}
.glass-section .cards{
  background:none;
  padding:0;
  box-shadow:none;
}
.hero-card{
  display:grid;
  gap:1rem;
  max-width:clamp(320px, 50vw, 560px);
}
.card:hover{transform:translateY(-2px)}
.card:focus-within{outline:2px solid color-mix(in oklab, var(--accent-1) 60%, var(--accent-2) 40%);outline-offset:3px}

/* ------------------------------
   Header / Nav
   ------------------------------ */
.site-header{
  position:sticky;top:0;z-index:20;
  background:color-mix(in oklab, var(--bg-0) 55%, transparent);
  border-bottom:1px solid var(--glass-border-color);
  backdrop-filter:blur(20px) saturate(160%);
  -webkit-backdrop-filter:blur(20px) saturate(160%);
  box-shadow:0 12px 30px color-mix(in srgb, black 14%, transparent);
  transition:opacity .2s, background .2s ease
}
.site-header.scrolled{opacity:.96;background:color-mix(in oklab, var(--bg-0) 60%, transparent)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.6rem 0}
.brand{display:flex;align-items:center;gap:.6rem;text-decoration:none;color:inherit}
.brand-mark{width:36px;height:36px}
.brand-text{font-size:1.2rem;font-weight:600;letter-spacing:.01em}
.nav-list{display:flex;gap:1rem;align-items:center;margin:0;padding:0;list-style:none}
.nav-toggle{display:none}
.nav-list .nav-link{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:.45rem 1rem;
  border-radius:999px;
  font-size:.95rem;
  font-weight:500;
  border:2px solid transparent;
  text-decoration:none;
  color:var(--text-0);
  background:
    linear-gradient(var(--bg-0), var(--bg-0)) padding-box,
    linear-gradient(90deg, var(--deoxy-blue), var(--capillary-purple), var(--oxy-red)) border-box;
  background-origin:border-box;
  background-clip:padding-box, border-box;
  box-shadow:none;
  transition:transform .15s ease, box-shadow .15s ease, color .15s ease, background .15s ease
}
.nav-list .nav-link:hover{
  transform:translateY(-1px);
  box-shadow:0 4px 14px color-mix(in oklab, black 15%, transparent);
  color:color-mix(in oklab, var(--text-0) 90%, var(--capillary-purple) 10%);
  background:
    linear-gradient(color-mix(in oklab, var(--bg-0) 95%, var(--capillary-purple) 5%), color-mix(in oklab, var(--bg-0) 95%, var(--capillary-purple) 5%)) padding-box,
    linear-gradient(90deg, var(--deoxy-blue), var(--capillary-purple), var(--oxy-red)) border-box
  ;
  background-origin:border-box;
  background-clip:padding-box, border-box
}
.nav-list .nav-link.is-active{
  color:color-mix(in oklab, var(--text-0) 85%, var(--accent-2) 15%);
  background:
    linear-gradient(color-mix(in oklab, var(--bg-0) 88%, var(--capillary-purple) 12%), color-mix(in oklab, var(--bg-0) 88%, var(--capillary-purple) 12%)) padding-box,
    linear-gradient(90deg, var(--deoxy-blue), var(--capillary-purple), var(--oxy-red)) border-box
  ;
  background-origin:border-box;
  background-clip:padding-box, border-box
}
.nav-list .nav-link.is-active,
.nav-list .nav-link:focus-visible{
  outline:2px solid color-mix(in oklab, var(--accent-1) 60%, var(--accent-2) 40%);
  outline-offset:2px
}
.nav-divider{width:1px;height:1.5rem;background:color-mix(in oklab, currentColor 10%, transparent)}
.btn-ghost{background:transparent;border:var(--border);padding:.35rem .55rem;border-radius:.6rem;cursor:pointer}

@media (max-width:800px){
  .nav-toggle{display:block}
  .nav-list{
    position:absolute;right:0;top:56px;background:var(--bg-0);
    padding:1rem;border:var(--border);border-radius:var(--radius);
    display:none;flex-direction:column;align-items:flex-start
  }
  .nav-list[aria-expanded="true"], .nav-list.open{display:flex}
}

/* ------------------------------
   Hero section (lungs + text + headshot)
   ------------------------------ */
.hero{
  position:relative; isolation:isolate;
  padding-block: clamp(2.5rem, 6vw, 4.5rem) clamp(1rem, 3vw, 2rem);
  min-height: clamp(420px, 60vh, 640px);

}
.hero-visual{
  position:absolute; inset:0; z-index:0; /* ensure SVG is visible behind content */
  overflow:visible; pointer-events:none;
  -webkit-mask-image: linear-gradient(to bottom, black 88%, transparent 100%);
          mask-image: linear-gradient(to bottom, black 88%, transparent 100%);
}
.hero-svg{display:none}
.hero-bg svg{ opacity:.08; filter:blur(20px); width:120%; transform:translate(-10%,-15%) }

.hero-row{
  position:relative; z-index:1;
  display:grid; grid-template-columns: auto 1.2fr;
  align-items:flex-start; gap: clamp(.75rem, 3vw, 1.8rem);
}
@media (max-width: 900px){
  .hero-row{ grid-template-columns: 1fr; }
  .headshot{ order:-1; justify-self:start; }
}

/* Headshot — perfect circle */
.headshot{
  width: clamp(160px, 28vw, 220px);
  aspect-ratio: 1 / 1;
  display:inline-block;
  border-radius:50%;
  overflow:hidden;     /* ensures circular crop */
  background:transparent;
  padding:0;
  box-shadow:var(--shadow);
}
.headshot img{
  display:block;
  width:100%; height:100%;
  object-fit:cover;
  border-radius:50%;
  border:none;
}

/* ------------------------------
   Misc components
   ------------------------------ */
.with-icon .icon{width:1.1em;height:1.1em;vertical-align:-.2em;margin-right:.35em}
.news-list{padding:0;margin:0;list-style:none}
.news-list li{padding:.35rem 0}
.skip-link{
  position:absolute;left:-999px;top:auto;transition:left .2s;
  padding:.4rem .6rem;background:var(--bg-3);border:var(--border);border-radius:.5rem
}
.skip-link:focus{left:.5rem;top:.5rem;z-index:1000}
.list-plain{list-style:none;margin:0;padding:0}

/* Footer */
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1rem;padding:0}
.footer-grid.glass-panel{padding:clamp(1.5rem,2.5vw,2.5rem);gap:clamp(1rem,2vw,1.6rem)}
.site-footer{
  margin-top:3rem;
  padding:2.5rem 0;
  border-top:none;
}

/* Resume/CV minor tweaks */
.resume,.cv{font-size:.95rem}
.resume{
  display:grid;
  gap:clamp(1.5rem, 3vw, 2.5rem);
}
.resume-header{
  display:flex;
  flex-direction:column;
  gap:.75rem;
}
.resume-header h2{margin:0;font-size:1.9rem}
.resume-tagline{margin:0;color:var(--text-1);font-weight:500}
.resume-contact{
  display:flex;
  flex-wrap:wrap;
  gap:.35rem .9rem;
  padding:0;
  margin:0;
  color:var(--text-1);
  font-size:.92rem;
}
.resume-contact a{text-decoration:none;color:inherit}
.resume-section{
  display:grid;
  gap:.75rem;
}
.resume-section h3{margin:0;color:var(--text-0);font-size:1.1rem}
.resume-item{
  display:grid;
  gap:.5rem;
}
.resume-item header{
  display:flex;
  flex-direction:column;
  gap:.35rem;
}
.resume-item h4{margin:0;font-size:1rem}
.resume-meta{
  display:flex;
  flex-wrap:wrap;
  gap:.75rem;
  font-size:.9rem;
  color:var(--text-1);
}
.resume-item ul{
  margin:0;
  padding-left:1.15rem;
  display:grid;
  gap:.4rem;
}
.resume-skills,
.resume-list{
  margin:0;
  padding-left:1.1rem;
  display:grid;
  gap:.35rem;
}
.resume-skills li strong{font-weight:600}
.cols{columns:2}