:root{
  --bg-page:#020617;
  --bg-card:#020617;
  --bg-soft:rgba(15,23,42,0.94);
  --accent:#38bdf8;
  --accent-soft:rgba(56,189,248,0.1);
  --accent-strong:#0ea5e9;
  --text-main:#e5e7eb;
  --text-dim:#9ca3af;
  --border-soft:rgba(148,163,184,0.4);
  --radius-lg:22px;
  --shadow-soft:0 26px 60px rgba(15,23,42,0.95);
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}

html,body{height:100%}

body{
  font-family:var(--font-sans);
  background:
    radial-gradient(circle at top left,rgba(56,189,248,0.14),transparent 55%),
    radial-gradient(circle at bottom right,rgba(129,140,248,0.16),transparent 55%),
    linear-gradient(135deg,#020617,#020617 40%,#020617 100%);
  color:var(--text-main);
  -webkit-font-smoothing:antialiased;
}

.container{
  width:100%;
  max-width:1120px;
  margin:0 auto;
  padding:0 1.5rem;
}

.site-header{
  position:sticky;
  top:0;
  z-index:10;
  backdrop-filter:blur(22px);
  background:linear-gradient(to bottom,rgba(15,23,42,0.96),rgba(15,23,42,0.7),transparent);
  border-bottom:1px solid rgba(37,99,235,0.6);
}

.site-header-inner{
  padding:1.5rem 0 1rem;
}

.brand-row{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:1.25rem;
}

.brand-title{
  display:flex;
  align-items:center;
  gap:.9rem;
}

.brand-mark{
  width:42px;
  height:42px;
  border-radius:30%;
  background:conic-gradient(from 150deg,#06b6d4,#0ea5e9,#6366f1,#06b6d4);
  padding:2px;
  box-shadow:0 0 0 1px rgba(148,163,184,0.4);
}

.brand-mark-inner{
  width:100%;
  height:100%;
  border-radius:inherit;
  background:radial-gradient(circle at 30% 0,#e5e7eb,transparent 55%),#020617;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:700;
  font-size:1.1rem;
  letter-spacing:.08em;
  color:var(--accent-strong);
}

.brand-text h1{
  font-size:1.38rem;
  letter-spacing:.08em;
  text-transform:uppercase;
}

.brand-text p{
  font-size:.8rem;
  color:var(--text-dim);
  letter-spacing:.16em;
  text-transform:uppercase;
}

.chip{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  padding:.35rem .8rem;
  border-radius:999px;
  border:1px solid rgba(148,163,184,0.6);
  background:rgba(15,23,42,0.95);
  font-size:.72rem;
  color:var(--text-dim);
  text-transform:uppercase;
  letter-spacing:.12em;
}

.main-intro{
  margin:2.2rem auto 0;
  padding:1.6rem 1.4rem 1.7rem;
  border-radius:var(--radius-lg);
  border:1px solid var(--border-soft);
  background:radial-gradient(circle at 0 0,rgba(56,189,248,0.15),transparent 52%),
             radial-gradient(circle at 100% 100%,rgba(129,140,248,0.15),transparent 55%),
             var(--bg-soft);
  box-shadow:var(--shadow-soft);
  display:grid;
  grid-template-columns:minmax(0,1.7fr) minmax(260px,1.05fr);
  gap:1.9rem;
}

.intro-main h2{
  font-size:1.45rem;
  margin-bottom:.8rem;
}

.intro-main p{
  font-size:.96rem;
  line-height:1.7;
  color:var(--text-dim);
}

.intro-main p + p{margin-top:.7rem}

.intro-side{
  border-radius:18px;
  padding:1rem 1.1rem;
  background:radial-gradient(circle at 0 0,rgba(56,189,248,0.25),transparent 65%),
             rgba(15,23,42,0.96);
  border:1px solid rgba(56,189,248,0.75);
}

.intro-side h3{
  font-size:.9rem;
  text-transform:uppercase;
  letter-spacing:.14em;
  margin-bottom:.55rem;
}

.intro-side p{
  font-size:.86rem;
  color:var(--text-main);
  line-height:1.6;
}

.intro-side ul{
  list-style:none;
  margin-top:.6rem;
}

.intro-side li{
  display:flex;
  gap:.45rem;
  align-items:flex-start;
  font-size:.8rem;
  color:var(--text-dim);
  margin-bottom:.25rem;
}

.intro-side li span.bullet{
  width:.42rem;
  height:.42rem;
  border-radius:999px;
  background:var(--accent);
  margin-top:.4rem;
}

.grid-section{
  margin:2.6rem auto 3rem;
}

.grid-header{
  display:flex;
  justify-content:space-between;
  align-items:baseline;
  gap:1.2rem;
  margin-bottom:1.4rem;
}

.grid-header h2{
  font-size:1rem;
  text-transform:uppercase;
  letter-spacing:.2em;
  color:var(--text-dim);
}

.grid-header span{
  font-size:.8rem;
  color:var(--text-dim);
}

.cards-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(180px,1fr));
  gap:1.1rem;
}

.scientist-card a{
  text-decoration:none;
  color:inherit;
}

.card-inner{
  padding:1.05rem 1.05rem 1rem;
  border-radius:18px;
  border:1px solid rgba(148,163,184,0.7);
  background:radial-gradient(circle at 0 0,rgba(56,189,248,0.12),transparent 50%),
             radial-gradient(circle at 100% 100%,rgba(129,140,248,0.16),transparent 55%),
             rgba(15,23,42,0.9);
  box-shadow:0 18px 40px rgba(15,23,42,0.85);
  display:flex;
  flex-direction:column;
  gap:.65rem;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}

.scientist-card:hover .card-inner{
  transform:translateY(-4px);
  box-shadow:0 24px 60px rgba(15,23,42,0.95);
  border-color:rgba(56,189,248,0.85);
}

.card-header{
  display:flex;
  align-items:center;
  gap:.7rem;
}

.avatar{
  width:38px;
  height:38px;
  border-radius:1.2rem;
  background:radial-gradient(circle at 0 0,#f9fafb,#e5e7eb);
  color:#020617;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:700;
  font-size:1.1rem;
  box-shadow:0 12px 26px rgba(15,23,42,0.85);
}

.card-title{
  font-size:.98rem;
  font-weight:600;
}

.card-desc{
  font-size:.8rem;
  color:var(--text-dim);
  line-height:1.5;
}

.card-footer{
  margin-top:.45rem;
  display:flex;
  justify-content:space-between;
  align-items:center;
}

.tag-pill{
  padding:.15rem .6rem;
  border-radius:999px;
  border:1px solid rgba(148,163,184,0.75);
  font-size:.7rem;
  color:var(--accent-strong);
  background:rgba(15,23,42,0.96);
}

.arrow{
  font-size:1.1rem;
  color:var(--accent);
}

/* Detail page layout with image on the right */

.detail-page .main-intro{
  margin-top:1.8rem;
  grid-template-columns:minmax(0,1.6fr) minmax(260px,0.95fr);
}

.detail-text h1{
  font-size:1.6rem;
  margin-bottom:.4rem;
}

.detail-text .subtitle{
  font-size:.9rem;
  color:var(--text-dim);
  margin-bottom:1rem;
}

.detail-content p{
  font-size:.95rem;
  line-height:1.8;
  color:var(--text-dim);
}

.detail-content p + p{
  margin-top:.9rem;
}

.back-link{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  font-size:.8rem;
  color:var(--text-dim);
  text-decoration:none;
  padding:.35rem .85rem;
  border-radius:999px;
  border:1px solid rgba(148,163,184,0.65);
  background:rgba(15,23,42,0.95);
}

.back-link:hover{
  color:var(--accent-strong);
  border-color:var(--accent-strong);
}

.detail-media{
  display:flex;
  align-items:center;
  justify-content:center;
}

.portrait-frame{
  width:100%;
  max-width:320px;
  aspect-ratio:3/4;
  border-radius:22px;
  overflow:hidden;
  border:1px solid rgba(148,163,184,0.7);
  box-shadow:0 22px 50px rgba(15,23,42,0.95);
  background:radial-gradient(circle at 0 0,rgba(56,189,248,0.25),transparent 60%),
             radial-gradient(circle at 100% 100%,rgba(129,140,248,0.25),transparent 65%),
             #020617;
  position:relative;
}

.portrait-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}

/* fallback pseudo-photo when gerçek resim yoksa */
.portrait-placeholder{
  width:100%;
  height:100%;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:.35rem;
  color:var(--text-main);
  font-size:.9rem;
}

.portrait-initials{
  width:82px;
  height:82px;
  border-radius:26px;
  background:radial-gradient(circle at 0 0,#e5e7eb,#cbd5f5);
  color:#020617;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:800;
  font-size:1.4rem;
  box-shadow:0 16px 40px rgba(15,23,42,0.95);
}

.portrait-placeholder span.label{
  font-size:.8rem;
  color:var(--text-dim);
}

/* Footer */

.site-footer{
  border-top:1px solid rgba(37,99,235,0.6);
  padding:1.3rem 0 1.6rem;
  margin-top:1.6rem;
  font-size:.75rem;
  color:var(--text-dim);
}

.site-footer span{opacity:.85}

/* Responsive */

@media (max-width:900px){
  .main-intro{grid-template-columns:1fr}
  .detail-page .main-intro{grid-template-columns:1fr}
  .detail-media{order:-1;margin-bottom:.75rem}
}

@media (max-width:640px){
  .site-header-inner{padding:1.1rem 0 .8rem}
  .main-intro{margin-top:1.5rem}
  .grid-header{flex-direction:column;align-items:flex-start}
}