/* =========================================================
   Dr. Richard Dalyai — Vascular Neurosurgery
   Modern & authoritative theme
   ========================================================= */

:root{
  --ink:        #0c1a2b;   /* deep navy */
  --ink-2:      #12263d;
  --ink-3:      #1c3551;
  --paper:      #ffffff;
  --mist:       #f4f7fa;   /* light section bg */
  --mist-2:     #e9eef4;
  --line:       #d8e1ea;
  --slate:      #4a5a6a;   /* body text */
  --slate-soft: #6b7a8a;
  --gold:       #c79a4a;   /* authoritative accent */
  --gold-deep:  #a87f33;
  --teal:       #1f7a8c;   /* secondary accent */
  --teal-deep:  #155c6b;
  --danger:     #b3402f;
  --radius:     14px;
  --radius-sm:  9px;
  --shadow:     0 18px 50px -24px rgba(12,26,43,.45);
  --shadow-sm:  0 8px 24px -14px rgba(12,26,43,.35);
  --maxw:       1180px;
  --ease:       cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:var(--slate);
  background:var(--paper);
  line-height:1.65;
  font-size:17px;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  font-family:"Fraunces","Georgia",serif;
  color:var(--ink);
  line-height:1.12;
  font-weight:600;
  margin:0 0 .5em;
  letter-spacing:-.01em;
}
h1{font-size:clamp(2.3rem,5vw,3.6rem)}
h2{font-size:clamp(1.7rem,3.3vw,2.5rem)}
h3{font-size:1.3rem}
p{margin:0 0 1.1em}
a{color:var(--teal-deep);text-decoration:none;transition:color .2s}
a:hover{color:var(--gold-deep)}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.eyebrow{
  font-family:"Inter",sans-serif;
  text-transform:uppercase;
  letter-spacing:.18em;
  font-size:.74rem;
  font-weight:600;
  color:var(--gold-deep);
  margin:0 0 1rem;
}
.section{padding:84px 0}
.section--mist{background:var(--mist)}
.section--ink{background:var(--ink);color:#c7d3df}
.section--ink h2,.section--ink h3{color:#fff}
.lead{font-size:1.2rem;color:var(--slate);max-width:62ch}
.center{text-align:center}
.center .lead{margin-left:auto;margin-right:auto}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.5em;
  font-weight:600;font-size:.97rem;
  padding:.85em 1.5em;border-radius:999px;
  border:1.5px solid transparent;cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s,background .2s,color .2s;
}
.btn:hover{transform:translateY(-2px)}
.btn--gold{background:var(--gold);color:#1b1304;box-shadow:0 10px 24px -12px var(--gold)}
.btn--gold:hover{background:var(--gold-deep);color:#fff}
.btn--ghost{border-color:rgba(255,255,255,.4);color:#fff}
.btn--ghost:hover{background:rgba(255,255,255,.08);color:#fff}
.btn--outline{border-color:var(--line);color:var(--ink)}
.btn--outline:hover{border-color:var(--gold);color:var(--gold-deep)}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.86);
  backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand{display:flex;align-items:center;gap:.7rem;font-family:"Fraunces",serif;font-weight:600;color:var(--ink);font-size:1.18rem}
.brand .mark{
  width:40px;height:40px;border-radius:10px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--ink-3),var(--ink));
  color:#fff;display:grid;place-items:center;
  font-family:"Fraunces",serif;font-weight:600;font-size:1.1rem;
  border:1px solid rgba(199,154,74,.5);
}
.brand small{display:block;font-family:"Inter",sans-serif;font-weight:500;font-size:.66rem;letter-spacing:.13em;text-transform:uppercase;color:var(--slate-soft)}
.nav-links{display:flex;align-items:center;gap:1.6rem;list-style:none;margin:0;padding:0}
.nav-links a{color:var(--ink);font-weight:500;font-size:.96rem;position:relative}
.nav-links a:hover{color:var(--gold-deep)}
.nav-links a.active{color:var(--gold-deep)}
.nav-links a.active::after{content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;background:var(--gold)}
.nav-cta{margin-left:.4rem}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--ink);margin:5px 0;transition:.3s}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;color:#dce6f0;
  background:
    radial-gradient(1200px 600px at 78% -10%,rgba(31,122,140,.30),transparent 60%),
    radial-gradient(900px 500px at 10% 110%,rgba(199,154,74,.16),transparent 55%),
    linear-gradient(160deg,var(--ink) 0%,var(--ink-2) 60%,#0a1622 100%);
}
.hero .container{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;padding-top:84px;padding-bottom:84px}
.hero .eyebrow{color:var(--gold)}
.hero h1{color:#fff}
.hero p{color:#b9c7d6;font-size:1.18rem;max-width:52ch}
.hero-cta{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:1.8rem}
.hero-stats{display:flex;gap:2.2rem;margin-top:2.6rem;flex-wrap:wrap}
.hero-stats .num{font-family:"Fraunces",serif;font-size:1.9rem;color:#fff;line-height:1}
.hero-stats .lbl{font-size:.8rem;text-transform:uppercase;letter-spacing:.1em;color:#8fa3b6;margin-top:.3rem}
.hero-portrait{
  position:relative;border-radius:20px;overflow:hidden;
  aspect-ratio:4/5;box-shadow:var(--shadow);
  border:1px solid rgba(255,255,255,.12);
}
.hero-portrait img{width:100%;height:100%;object-fit:cover}
.hero-badge{
  position:absolute;left:18px;bottom:18px;right:18px;
  background:rgba(12,26,43,.72);backdrop-filter:blur(8px);
  border:1px solid rgba(255,255,255,.14);border-radius:12px;
  padding:14px 16px;color:#fff;
}
.hero-badge strong{font-family:"Fraunces",serif;font-weight:600}
.hero-badge span{display:block;font-size:.82rem;color:#9fb1c2}

/* ---------- Image placeholder ---------- */
.imgph{
  background:
    linear-gradient(135deg,var(--ink-3),var(--ink));
  color:#7f97ad;display:grid;place-items:center;text-align:center;
  font-size:.85rem;letter-spacing:.04em;padding:1rem;width:100%;height:100%;
}
.imgph::after{content:attr(data-label);max-width:24ch}

/* ---------- Trust bar ---------- */
.trust{background:var(--ink-2);color:#9fb1c2;border-top:1px solid rgba(255,255,255,.07)}
.trust .container{display:flex;flex-wrap:wrap;gap:14px 38px;justify-content:center;align-items:center;padding:22px 24px}
.trust span{font-size:.84rem;letter-spacing:.08em;text-transform:uppercase;display:flex;align-items:center;gap:.5rem}
.trust span::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--gold)}

/* ---------- Cards ---------- */
.grid{display:grid;gap:24px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px;transition:transform .25s var(--ease),box-shadow .25s,border-color .25s;
  height:100%;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm);border-color:#c4d2e0}
.card .ico{
  width:48px;height:48px;border-radius:12px;margin-bottom:18px;
  background:linear-gradient(135deg,rgba(31,122,140,.15),rgba(199,154,74,.15));
  display:grid;place-items:center;color:var(--teal-deep);
}
.card h3{margin-bottom:.4em}
.card p{font-size:.98rem;color:var(--slate)}
.card .more{font-weight:600;font-size:.92rem;color:var(--gold-deep)}

/* ---------- Media cards ---------- */
.mcard{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;display:flex;flex-direction:column;height:100%;
  transition:transform .25s var(--ease),box-shadow .25s;
}
.mcard:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm)}
.mcard.is-disabled{cursor:default}
.mcard.is-disabled:hover{transform:none;box-shadow:none}
.mcard.is-disabled .play{background:rgba(12,26,43,.18)}
.mcard.is-disabled .play i{opacity:.55}
.mcard .media{aspect-ratio:16/9}
.mcard .media img,.newsrow .thumb img{width:100%;height:100%;object-fit:cover;display:block}
.mcard .body{padding:22px 24px 26px;display:flex;flex-direction:column;flex:1}
.mcard .tag{font-size:.72rem;text-transform:uppercase;letter-spacing:.12em;color:var(--gold-deep);font-weight:600;margin-bottom:.5rem}
.mcard h3{font-size:1.18rem;margin-bottom:.4em}
.mcard p{font-size:.95rem;flex:1}
.mcard .meta{font-size:.82rem;color:var(--slate-soft);margin-top:.4rem}
.mcard .meta-link{font-size:.86rem;font-weight:600;color:var(--gold-deep);margin-top:.4rem}
.mcard .meta-link:hover{color:var(--teal-deep)}

/* ---------- Video card ---------- */
.video .media{position:relative}
.video .play{
  position:absolute;inset:0;display:grid;place-items:center;
  background:rgba(12,26,43,.28);transition:background .2s;
}
.video:hover .play{background:rgba(12,26,43,.45)}
.video .play i{
  width:60px;height:60px;border-radius:50%;background:rgba(255,255,255,.92);
  display:grid;place-items:center;color:var(--ink);box-shadow:var(--shadow-sm);
}
.video .play i::before{content:"";border-style:solid;border-width:11px 0 11px 18px;border-color:transparent transparent transparent var(--ink);margin-left:4px}

/* ---------- About split ---------- */
.split{display:grid;grid-template-columns:.95fr 1.05fr;gap:54px;align-items:center}
.split .portrait{border-radius:18px;overflow:hidden;aspect-ratio:4/5;box-shadow:var(--shadow)}
.credentials{list-style:none;margin:1.4rem 0 0;padding:0;display:grid;gap:.7rem}
.credentials li{display:flex;gap:.7rem;align-items:flex-start;font-size:.98rem}
.credentials li::before{content:"\2713";flex:0 0 auto;width:24px;height:24px;border-radius:7px;margin-top:1px;background:linear-gradient(135deg,var(--teal),var(--teal-deep));color:#fff;display:grid;place-items:center;font-size:.8rem;font-weight:700}
.publication-list{display:grid;gap:14px}
.publication-list a{
  display:grid;gap:4px;padding:18px 20px;border:1px solid var(--line);border-radius:var(--radius-sm);
  background:var(--paper);color:inherit
}
.publication-list a:hover{box-shadow:var(--shadow-sm);transform:translateY(-2px)}
.publication-list strong{color:var(--ink);font-size:1.02rem}
.publication-list span{color:var(--slate);font-size:.95rem}

/* ---------- FAQ ---------- */
.faq{max-width:840px;margin:0 auto}
.faq details{
  border:1px solid var(--line);border-radius:var(--radius-sm);
  background:var(--paper);margin-bottom:14px;overflow:hidden;
}
.faq details[open]{box-shadow:var(--shadow-sm);border-color:#c4d2e0}
.faq summary{
  cursor:pointer;list-style:none;padding:20px 26px;font-weight:600;
  color:var(--ink);font-size:1.05rem;display:flex;justify-content:space-between;align-items:center;gap:1rem;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.5rem;color:var(--gold-deep);font-weight:400;transition:transform .25s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .answer{padding:0 26px 22px;color:var(--slate);font-size:.98rem}
.faq .answer p:last-child{margin-bottom:0}

/* ---------- Newsletter band ---------- */
.cta-band{
  background:
    radial-gradient(800px 400px at 85% 20%,rgba(199,154,74,.18),transparent 60%),
    linear-gradient(150deg,var(--ink),var(--ink-2));
  color:#fff;border-radius:22px;padding:56px;box-shadow:var(--shadow);
}
.cta-band h2{color:#fff}
.cta-band p{color:#b9c7d6;max-width:54ch}
.signup{display:flex;gap:.7rem;flex-wrap:wrap;margin-top:1.4rem;max-width:520px}
.signup input[type=email]{
  flex:1;min-width:230px;padding:.95em 1.1em;border-radius:999px;border:1.5px solid rgba(255,255,255,.25);
  background:rgba(255,255,255,.06);color:#fff;font-size:1rem;
}
.signup input::placeholder{color:#90a3b6}
.signup input:focus{outline:none;border-color:var(--gold)}
.form-note{font-size:.8rem;color:#8fa3b6;margin-top:.9rem}

/* ---------- Article body ---------- */
.article{max-width:760px;margin:0 auto;padding:64px 24px}
.article .kicker{color:var(--gold-deep);font-weight:600;text-transform:uppercase;letter-spacing:.12em;font-size:.78rem}
.article h1{margin:.4em 0 .3em}
.article .byline{color:var(--slate-soft);font-size:.92rem;margin-bottom:2rem;padding-bottom:1.5rem;border-bottom:1px solid var(--line)}
.article h2{margin-top:1.8em}
.article p,.article li{font-size:1.08rem}
.article blockquote{
  border-left:3px solid var(--gold);margin:1.6em 0;padding:.4em 0 .4em 1.4em;
  font-family:"Fraunces",serif;font-size:1.25rem;color:var(--ink);font-style:italic;
}
.callout{background:var(--mist);border:1px solid var(--line);border-radius:var(--radius);padding:24px 28px;margin:1.8em 0}
.callout strong{color:var(--ink)}

/* ---------- News list ---------- */
.newsrow{
  display:grid;grid-template-columns:200px 1fr;gap:28px;align-items:center;
  padding:26px 0;border-bottom:1px solid var(--line);
}
.newsrow .thumb{aspect-ratio:16/10;border-radius:var(--radius-sm);overflow:hidden}
.newsrow .src{font-size:.76rem;text-transform:uppercase;letter-spacing:.1em;color:var(--gold-deep);font-weight:600}
.newsrow h3{font-size:1.25rem;margin:.3em 0 .4em}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:#9fb1c2;padding:64px 0 30px}
.site-footer a{color:#c7d3df}
.site-footer a:hover{color:var(--gold)}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:34px}
.foot-grid h4{color:#fff;font-family:"Inter",sans-serif;font-size:.8rem;text-transform:uppercase;letter-spacing:.12em;margin-bottom:1rem}
.foot-grid ul{list-style:none;margin:0;padding:0;display:grid;gap:.6rem;font-size:.94rem}
.foot-brand{display:flex;align-items:center;gap:.7rem;color:#fff;font-family:"Fraunces",serif;font-size:1.2rem;margin-bottom:1rem}
.foot-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:40px;padding-top:22px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:.84rem;color:#7f93a6}
.disclaimer{font-size:.82rem;color:#7f93a6;max-width:60ch;margin-top:.8rem}

/* ---------- Utility ---------- */
.mt-0{margin-top:0}.mb-0{margin-bottom:0}
.section-head{max-width:680px;margin:0 auto 48px;text-align:center}
.section-head.left{margin-left:0;text-align:left}

/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media(max-width:980px){
  .hero .container{grid-template-columns:1fr;gap:36px}
  .hero-portrait{max-width:380px}
  .split{grid-template-columns:1fr;gap:32px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:760px){
  body{font-size:16px}
  .section{padding:60px 0}
  .nav-links{
    position:absolute;top:74px;left:0;right:0;background:#fff;
    flex-direction:column;align-items:flex-start;gap:0;
    border-bottom:1px solid var(--line);padding:8px 24px 18px;
    box-shadow:var(--shadow-sm);display:none;
  }
  .nav-links.open{display:flex}
  .nav-links li{width:100%}
  .nav-links a{display:block;padding:12px 0;width:100%}
  .nav-links .nav-cta{margin:8px 0 0}
  .nav-toggle{display:block}
  .grid-3,.grid-2,.grid-4{grid-template-columns:1fr}
  .newsrow{grid-template-columns:1fr}
  .cta-band{padding:34px 24px}
  .foot-grid{grid-template-columns:1fr}
  .hero-stats{gap:1.6rem}
}