/* steven.tiell.com — hand-written, no framework. Mobile-first. */
@font-face{font-family:'Inter';font-style:normal;font-weight:100 900;font-display:swap;src:url(/fonts/inter-var.woff2) format('woff2')}

:root{
  --bg:#0F0F0F;--card:#181818;--card-2:#1F1F1F;--line:#262626;--line-2:#2E2E2E;
  --ink:#F4F4F4;--muted:#9F9F9F;--dim:#6F6F6F;--accent:#5B78F6;--accent-2:#3EA6E6;
  --radius:30px;--radius-s:20px;--gutter:clamp(16px,3vw,28px);--gap:clamp(14px,2vw,22px);
  --maxw:1140px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip{position:absolute;left:-999px;top:8px;background:var(--accent);color:#fff;padding:8px 14px;border-radius:8px;z-index:100}
.skip:focus{left:8px}
.wrap{width:min(100% - 2*var(--gutter),var(--maxw));margin-inline:auto}

/* ---------- header ---------- */
.site-header{padding:18px 0}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px}
.site-header .cta{margin-left:auto}
.brand{font-weight:600;letter-spacing:-.01em;font-size:17px}
.brand span{color:var(--accent)}
.nav{display:none}
.nav a{color:var(--muted);padding:8px 14px;border-radius:999px;font-size:15px;transition:color .2s}
.nav a:hover{color:var(--ink)}
.nav a[aria-current="page"]{color:var(--ink);font-weight:600}
.cta{display:inline-flex;align-items:center;justify-content:center;background:var(--card-2);color:var(--ink);font-weight:600;padding:12px 26px;border-radius:999px;font-size:15px;border:1px solid var(--line-2);transition:background .2s,border-color .2s}
.cta:hover{background:#2a2a2a;border-color:#3a3a3a}
.menu-btn{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:999px;background:var(--card-2);border:1px solid var(--line-2);color:var(--ink);cursor:pointer}
.menu-btn svg{width:22px;height:22px}
.menu-btn .close{display:none}
.menu-btn[aria-expanded="true"] .open{display:none}
.menu-btn[aria-expanded="true"] .close{display:block}
.site-header .mobile-nav{display:none;padding:6px 0 12px}
.site-header .mobile-nav.is-open{display:block}
.mobile-nav ul{list-style:none;margin:0;padding:0;background:var(--card);border-radius:var(--radius-s);border:1px solid var(--line);overflow:hidden}
.mobile-nav a{display:block;padding:14px 20px;color:var(--muted);border-bottom:1px solid var(--line);font-size:16px}
.mobile-nav li:last-child a{border-bottom:0}
.mobile-nav a[aria-current="page"]{color:var(--ink);font-weight:600}
@media (min-width:900px){
  .site-header{padding:22px 0}
  .brand{display:none}
  .nav{display:flex;gap:2px;margin-inline:auto}
  .menu-btn,.mobile-nav{display:none!important}
  .site-header .wrap{justify-content:center;position:relative}
  .site-header .cta{position:absolute;right:0;top:50%;transform:translateY(-50%)}
}

/* ---------- layout ---------- */
main{padding:clamp(28px,6vw,80px) 0 clamp(40px,6vw,80px)}
.grid{display:grid;gap:var(--gap);grid-template-columns:1fr}
.page-title{margin:0 0 clamp(22px,4vw,36px);text-align:center;font-weight:700;font-size:clamp(38px,8vw,72px);letter-spacing:-.03em;line-height:1;text-transform:uppercase;display:flex;align-items:center;justify-content:center;gap:.1em}
.page-title svg{width:.5em;height:.5em;flex:none}

/* ---------- card ---------- */
.card{position:relative;background:var(--card);border-radius:var(--radius);padding:clamp(22px,3vw,32px);overflow:hidden;
  background-image:radial-gradient(120% 90% at 15% 0%,rgba(255,255,255,.045),transparent 60%);
  box-shadow:0 0 0 1px rgba(255,255,255,.03) inset,0 20px 60px -30px rgba(0,0,0,.8);
  transition:transform .25s ease,box-shadow .25s ease}
.card.is-link:hover{transform:translateY(-3px);box-shadow:0 0 0 1px rgba(255,255,255,.06) inset,0 30px 70px -30px rgba(0,0,0,.9)}
.card .overlay{position:absolute;inset:0;z-index:2;border-radius:inherit}
.card .kicker{font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin:0 0 6px}
.card .title{font-size:clamp(20px,2.4vw,26px);font-weight:600;letter-spacing:-.01em;margin:0;line-height:1.2}
.card .foot{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-top:auto}
.go{flex:none;width:40px;height:40px;border-radius:999px;border:1px solid var(--line-2);display:inline-flex;align-items:center;justify-content:center;color:var(--muted);background:rgba(255,255,255,.02);transition:background .2s,color .2s,border-color .2s}
.go svg{width:18px;height:18px}
.card.is-link:hover .go{background:var(--accent);border-color:var(--accent);color:#fff}
.card.is-link .go{position:absolute;right:clamp(22px,3vw,32px);bottom:clamp(22px,3vw,32px)}
.card.is-link .title{padding-right:3.4em}

/* ---------- home ---------- */
.home-grid{display:grid;gap:var(--gap);grid-template-columns:1fr}
.hero{display:grid;gap:22px;grid-template-columns:1fr;padding-bottom:clamp(22px,3vw,32px)}
.hero .photo{border-radius:22px;overflow:hidden;aspect-ratio:1;width:min(100%,260px)}
.hero .photo img{width:100%;height:100%;object-fit:cover}
.hero .kicker{font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin:0 0 6px}
.hero .name{font-size:clamp(34px,4vw,44px);font-weight:600;letter-spacing:-.02em;line-height:1.1;margin:0 0 14px}
.hero p{color:var(--muted);margin:0 3em 0 0;font-size:15px;line-height:1.55}
.stats{display:grid;gap:10px;grid-template-columns:repeat(3,1fr)}
@media (min-width:640px){.stats{gap:14px}}
.stat{min-width:0;background:var(--card-2);border-radius:22px;padding:22px 10px;text-align:center;background-image:radial-gradient(120% 90% at 20% 0%,rgba(255,255,255,.04),transparent 60%)}
.stat b{display:block;font-size:clamp(28px,4vw,42px);font-weight:600;letter-spacing:-.02em;line-height:1}
.stat span{display:block;margin-top:12px;font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);line-height:1.5}
.stat span span{display:inline;margin:0;color:var(--muted)}
.icons{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:8px 0 34px}
.icons a{display:flex;flex-direction:column;align-items:center;gap:10px;color:var(--ink);text-align:center;font-size:12px;position:relative;z-index:3}
.icons svg{width:38px;height:38px;stroke-width:1.2}
.icons a span{color:var(--muted);letter-spacing:.04em;text-transform:uppercase;font-size:10.5px;line-height:1.3;max-width:120px}
.icons a:hover{color:var(--accent)}
.icons a:hover span{color:var(--ink)}
.card.pubs .thumb{border-radius:14px;overflow:hidden;margin-bottom:26px;aspect-ratio:508/272}
.card.pubs .thumb img{width:100%;height:100%;object-fit:cover}
.card.blog .thumb{max-width:200px;margin:0 0 26px}
.card.contact-cta{display:flex;flex-direction:column;justify-content:center;min-height:200px}
.card.contact-cta .spark{position:absolute;left:34px;top:0;height:78px;width:1px;background:var(--line-2)}
.card.contact-cta .spark svg{position:absolute;left:50%;top:64px;transform:translate(-50%,-50%);width:34px;height:34px;color:var(--ink);background:var(--card);padding:7px;border-radius:50%}
.card.contact-cta h2{font-size:clamp(34px,5vw,52px);font-weight:600;letter-spacing:-.02em;line-height:1.05;margin:26px 0 0}
.card.contact-cta h2 span{color:var(--accent-2)}
.card.linkedin .sig{max-width:150px;margin:0 0 30px}
@media (min-width:640px){
  .hero{grid-template-columns:auto 1fr;align-items:center}
  .hero .photo{width:clamp(180px,26vw,260px)}
  .home-grid{grid-template-columns:repeat(4,1fr)}
  .home-grid>.hero{grid-column:span 4}
  .home-grid>.stats-card{grid-column:span 4}
  .home-grid>.services{grid-column:span 4}
  .home-grid>.pubs{grid-column:span 2}
  .home-grid>.blog{grid-column:span 2}
  .home-grid>.contact-cta{grid-column:span 4}
  .home-grid>.linkedin{grid-column:span 4}
  .icons{grid-template-columns:repeat(6,1fr)}
}
@media (min-width:900px){
  .home-grid{grid-template-columns:repeat(12,1fr)}
  .home-grid>.hero{grid-column:span 7}
  .home-grid>.stats-card{grid-column:span 5;align-self:start}
  .home-grid>.services{grid-column:span 9}
  .home-grid>.pubs{grid-column:span 3}
  .home-grid>.blog{grid-column:span 3}
  .home-grid>.contact-cta{grid-column:span 6}
  .home-grid>.linkedin{grid-column:span 3}
  .icons{margin:10px 0 44px}
}

/* ---------- about ---------- */
.about-top{display:grid;gap:var(--gap);grid-template-columns:1fr}
.about-top .photo{padding:clamp(18px,2.5vw,28px)}
.about-top .photo img{border-radius:22px;aspect-ratio:1;object-fit:cover;width:100%}
.about-top .intro h2{font-size:clamp(26px,3vw,34px);font-weight:600;letter-spacing:-.01em;margin:0 0 12px}
.about-top .intro p{color:#D6D6D6;margin:0;font-size:16px;line-height:1.65}
.about-cols{display:grid;gap:var(--gap);grid-template-columns:1fr;margin-top:var(--gap)}
.list-card h3{font-size:14px;letter-spacing:.04em;text-transform:uppercase;font-weight:600;margin:0 0 18px}
.list-card ol{list-style:none;margin:0;padding:0}
.list-card li+li{margin-top:18px}
.list-card .years{display:block;color:var(--muted);font-size:14px}
.list-card .role{display:block;font-weight:600;font-size:17px;line-height:1.3;letter-spacing:-.005em}
.list-card .org{display:block;color:var(--muted);font-size:14px}
.bottom-row{display:grid;gap:var(--gap);grid-template-columns:1fr;margin-top:var(--gap)}
@media (min-width:640px){
  .bottom-row{grid-template-columns:repeat(2,1fr)}
  .bottom-row>.contact-cta{grid-column:span 2}
}
@media (min-width:900px){
  .about-top{grid-template-columns:5fr 7fr;align-items:start}
  .about-top .title-col{display:flex;flex-direction:column;gap:var(--gap)}
  .about-cols{grid-template-columns:1fr 1fr}
  .about-cols .side{display:flex;flex-direction:column;gap:var(--gap)}
  .bottom-row{grid-template-columns:3fr 3fr 6fr}
  .bottom-row>.contact-cta{grid-column:auto}
}

/* ---------- advisory ---------- */
.adv{display:grid;gap:var(--gap);grid-template-columns:1fr}
.adv-nav{display:none}
.adv-nav ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}
.adv-nav a{display:flex;align-items:center;gap:16px;padding:14px 12px;border-radius:16px;color:var(--ink);font-size:13px;letter-spacing:.04em;text-transform:uppercase;line-height:1.25;transition:background .2s}
.adv-nav a svg{width:26px;height:26px;flex:none;stroke-width:1.2}
.adv-nav a:hover,.adv-nav a.is-active{background:var(--card-2)}
.services-grid{display:grid;gap:var(--gap);grid-template-columns:1fr}
.service{background:var(--card-2);border-radius:var(--radius-s);padding:clamp(20px,2.5vw,28px);background-image:radial-gradient(120% 90% at 20% 0%,rgba(255,255,255,.035),transparent 60%);scroll-margin-top:24px}
.service .hd{display:flex;align-items:center;gap:12px;margin:0 0 12px}
.service .hd svg{width:26px;height:26px;stroke-width:1.2;color:var(--accent)}
.service h2{font-size:14px;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);font-weight:600;margin:0}
.service p{margin:0 0 16px;color:#D6D6D6;font-size:15px;line-height:1.65}
.service .related{font-size:14px;color:var(--muted);margin:0}
.service .related a{color:var(--accent);text-decoration:underline;text-decoration-color:rgba(91,120,246,.35);text-underline-offset:3px}
.service .related a:hover{text-decoration-color:var(--accent)}
.service .related li{margin-top:6px}
.service .related ul{list-style:none;padding:0;margin:6px 0 0}
@media (min-width:640px){.services-grid{grid-template-columns:1fr 1fr}}
@media (min-width:900px){
  .adv{grid-template-columns:300px 1fr;align-items:start}
  .adv-nav{display:block;position:sticky;top:20px}
}

/* ---------- publications / patents ---------- */
.tiles{display:grid;gap:var(--gap);grid-template-columns:1fr}
.tile{padding:18px 18px 22px;display:flex;flex-direction:column}
.tile .thumb{border-radius:18px;overflow:hidden;aspect-ratio:16/10;background:#222;margin-bottom:16px}
.tile .thumb img{width:100%;height:100%;object-fit:cover;object-position:top}
.tile .meta{font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin:0 0 8px;line-height:1.6}
.tile .meta b{display:block;font-weight:500}
.tile h2{font-size:18px;font-weight:600;line-height:1.3;letter-spacing:-.005em;margin:0 2.6em 0 0}
.tile .go{position:absolute;right:18px;bottom:22px}
.filters{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin:0 0 clamp(20px,3vw,30px)}
.filters button{background:var(--card);border:1px solid var(--line);color:var(--muted);border-radius:999px;padding:8px 16px;font:inherit;font-size:13px;cursor:pointer}
.filters button[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:#fff}
.tile[hidden]{display:none}
@media (min-width:520px){.tiles{grid-template-columns:repeat(2,1fr)}}
@media (min-width:820px){.tiles{grid-template-columns:repeat(3,1fr)}}
@media (min-width:1100px){.tiles{grid-template-columns:repeat(4,1fr)}}

/* ---------- contact ---------- */
.contact{display:grid;gap:var(--gap);grid-template-columns:1fr}
.contact-side h2{font-size:14px;letter-spacing:.05em;text-transform:uppercase;font-weight:600;margin:0 0 16px}
.contact-side .loc{display:flex;gap:18px;align-items:flex-start;margin-bottom:34px}
.contact-side .loc .ic{width:68px;height:68px;border-radius:16px;background:var(--card);display:flex;align-items:center;justify-content:center;flex:none}
.contact-side .loc .ic svg{width:26px;height:26px;stroke-width:1.2}
.contact-side .loc small{display:block;color:var(--muted);letter-spacing:.05em;text-transform:uppercase;font-size:12px;margin-bottom:4px}
.contact-side .loc p{margin:0;line-height:1.35}
.socials{display:flex;gap:16px}
.socials a{width:74px;height:74px;border-radius:999px;background:var(--card);display:flex;align-items:center;justify-content:center;transition:background .2s}
.socials a:hover{background:var(--accent)}
.socials svg{width:28px;height:28px;stroke-width:1.2}
.form-card h1{font-size:clamp(34px,5vw,48px);font-weight:600;letter-spacing:-.02em;line-height:1.1;margin:0 0 26px}
.form-card h1 span{color:var(--accent-2)}
.form-card form{display:grid;gap:12px}
.field{position:relative}
.field input,.field textarea{width:100%;background:var(--card-2);border:1px solid transparent;border-radius:14px;color:var(--ink);padding:18px 20px;font:inherit;font-size:15px;transition:border-color .2s}
.field textarea{min-height:150px;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:var(--dim)}
.field input:focus,.field textarea:focus{border-color:var(--accent);outline:none}
.hp{position:absolute;left:-9999px;opacity:0;height:0;width:0}
.btn{background:#2B2B2B;color:var(--ink);border:0;border-radius:14px;padding:18px;font:inherit;font-weight:600;font-size:15px;cursor:pointer;transition:background .2s}
.btn:hover{background:var(--accent)}
.btn[disabled]{opacity:.6;cursor:progress}
.form-msg{margin:4px 0 0;font-size:14px;color:var(--muted)}
.form-msg.ok{color:#7ED8A5}
.form-msg.err{color:#F08A8A}
@media (min-width:900px){.contact{grid-template-columns:5fr 7fr;align-items:start}.contact-side{padding-top:8px}}

/* ---------- footer ---------- */
.site-footer{padding:clamp(30px,5vw,60px) 0 40px;text-align:center}
.site-footer ul{list-style:none;margin:0 0 22px;padding:0;display:flex;flex-wrap:wrap;justify-content:center;gap:10px 28px}
.site-footer li a{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:600}
.site-footer li a:hover{color:var(--ink)}
.site-footer p{margin:0;color:var(--muted);font-size:14px}
.site-footer p a{color:var(--accent-2)}

/* ---------- 404 ---------- */
.notfound{text-align:center;padding:60px 0}
.notfound h1{font-size:clamp(48px,10vw,120px);margin:0;letter-spacing:-.04em;line-height:1}
.notfound p{color:var(--muted)}

@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
@media print{body{background:#fff;color:#000}.card{box-shadow:none;background:#fff;border:1px solid #ccc}.site-header .cta,.menu-btn{display:none}}