:root{
  --bg: #0b0f17;
  --panel: rgba(255,255,255,0.06);
  --panel2: rgba(255,255,255,0.10);
  --text: rgba(255,255,255,0.92);
  --muted: rgba(255,255,255,0.70);
  --border: rgba(255,255,255,0.12);
  --accent: #7c5cff;
  --shadow: 0 18px 60px rgba(0,0,0,0.35);
  --radius: 18px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1000px 700px at 15% 10%, rgba(124,92,255,0.25), transparent 55%),
    radial-gradient(900px 600px at 85% 20%, rgba(124,92,255,0.10), transparent 55%),
    var(--bg);
}

a{ color: inherit; text-decoration: none; }
p{ line-height: 1.55; }

.container{
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
}

/* Header */
.site-header{
  position: sticky;
  top:0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(11,15,23,0.55);
  border-bottom: 1px solid var(--border);
}

.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding: 14px 0;
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:700;
  letter-spacing: -0.02em;
}

.brand-mark{
  color: var(--accent);
  font-size: 20px;
}

.nav-menu{
  display:flex;
  align-items:center;
  gap: 14px;
  list-style:none;
  margin:0;
  padding:0;
}

.nav-menu a{
  color: var(--muted);
  font-weight: 500;
  padding: 10px 10px;
  border-radius: 10px;
}

.nav-menu a:hover{
  color: var(--text);
  background: rgba(255,255,255,0.06);
}

.nav-toggle{
  display:none;
  background: transparent;
  border:0;
  padding: 10px;
  border-radius: 12px;
  cursor:pointer;
}

.hamburger{
  width: 22px;
  height: 2px;
  background: var(--text);
  display:block;
  position: relative;
  border-radius: 999px;
}
.hamburger::before,
.hamburger::after{
  content:"";
  position:absolute;
  left:0;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 999px;
}
.hamburger::before{ top:-7px; }
.hamburger::after{ top:7px; }

.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;
}

/* Buttons & links */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding: 12px 16px;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid rgba(255,255,255,0.18);
  background: linear-gradient(180deg, rgba(124,92,255,0.95), rgba(124,92,255,0.75));
  box-shadow: 0 12px 30px rgba(124,92,255,0.22);
}

.btn:hover{ filter: brightness(1.05); }

.btn-small{
  padding: 10px 14px;
  font-size: 14px;
}

.btn-ghost{
  background: rgba(255,255,255,0.06);
  box-shadow: none;
}

.link{
  color: rgba(255,255,255,0.85);
  font-weight: 600;
}
.link:hover{ text-decoration: underline; }

.muted{ color: var(--muted); }
.accent{ color: rgba(255,255,255,0.95); }

/* Hero */
.hero{
  padding: 56px 0 14px;
}

.hero-grid{
  display:grid;
  grid-template-columns: 1.35fr 0.65fr;
  gap: 24px;
  align-items: start;
}

.eyebrow{
  color: var(--muted);
  font-weight: 600;
  letter-spacing: 0.02em;
  margin: 0 0 10px;
}

h1{
  margin: 0 0 10px;
  font-size: clamp(28px, 3.2vw, 44px);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.lead{
  margin: 10px 0 18px;
  color: rgba(255,255,255,0.82);
  font-size: 16.5px;
}

.hero-cta{
  display:flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 12px 0 16px;
}

.quickfacts{
  display:flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 10px 0 8px;
}

.pill{
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  color: rgba(255,255,255,0.82);
  font-weight: 600;
  font-size: 13.5px;
}

.links-row{
  display:flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 10px;
}

/* Cards */
.card{
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}

.cards{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.section{
  padding: 42px 0;
}

.section-head h2{
  margin: 0 0 6px;
  letter-spacing: -0.02em;
  font-size: 26px;
}
.section-head p{
  margin: 0 0 18px;
  color: var(--muted);
}

/* Hero card */
.hero-card{
  position: sticky;
  top: 82px;
}

.profile{
  display:flex;
  gap: 12px;
  align-items:center;
  margin-bottom: 12px;
}

.avatar{
  width: 54px;
  height: 54px;
  border-radius: 16px;
  background:
    radial-gradient(16px 16px at 30% 30%, rgba(255,255,255,0.18), transparent 60%),
    linear-gradient(135deg, rgba(124,92,255,0.65), rgba(255,255,255,0.08));
  border: 1px solid rgba(255,255,255,0.16);
}

.profile-name{
  margin:0;
  font-weight: 800;
}
.profile-role{
  margin: 2px 0 0;
  color: var(--muted);
  font-weight: 600;
}

.highlights{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 12px 0 14px;
}

.stat{
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px;
  text-align:center;
}
.stat-number{
  margin:0;
  font-weight: 900;
  letter-spacing: -0.02em;
}
.stat-label{
  margin: 4px 0 0;
  color: var(--muted);
  font-weight: 600;
  font-size: 13px;
}

.card-actions{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 12px;
}

.fineprint{
  margin: 12px 0 0;
  color: rgba(255,255,255,0.62);
  font-size: 13px;
}

/* Publication card */
.pub-card h3{ margin-top: 0; }
.pub-links{
  display:flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 10px;
}

/* Timeline */
.timeline{
  display:flex;
  flex-direction: column;
  gap: 12px;
}
.t-item{
  display:grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 14px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255,255,255,0.05);
}
.t-title{
  margin:0;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.t-left .muted{ margin: 6px 0 0; }
.t-right ul{
  margin: 0;
  padding-left: 18px;
  color: rgba(255,255,255,0.84);
}

/* Skills */
.skills-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.chips{
  list-style:none;
  padding:0;
  margin: 10px 0 0;
  display:flex;
  flex-wrap: wrap;
  gap: 10px;
}
.chips li{
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  color: rgba(255,255,255,0.82);
  font-weight: 600;
  font-size: 13.5px;
}

/* Contact */
.contact-grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  align-items: start;
}
.contact-cards{
  display:grid;
  grid-template-columns: 1fr;
  gap: 10px;
}
.mini-card{
  padding: 14px;
  border-radius: var(--radius);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
}
.mini-title{
  margin:0 0 6px;
  color: var(--muted);
  font-weight: 700;
}

.form label{
  display:flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
  font-weight: 700;
}
input, textarea{
  width:100%;
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(0,0,0,0.25);
  color: var(--text);
  font-family: inherit;
  font-size: 14.5px;
}
input::placeholder, textarea::placeholder{
  color: rgba(255,255,255,0.45);
}
.form .btn{ margin-top: 14px; width: 100%; }

/* Footer */
.footer{
  padding: 22px 0 34px;
  border-top: 1px solid var(--border);
  margin-top: 10px;
}
.footer-inner{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

/* Mobile */
@media (max-width: 900px){
  .hero-grid{ grid-template-columns: 1fr; }
  .hero-card{ position: static; }
  .cards{ grid-template-columns: 1fr; }
  .skills-grid{ grid-template-columns: 1fr; }
  .contact-grid{ grid-template-columns: 1fr; }
  .t-item{ grid-template-columns: 1fr; }

  .nav-toggle{ display:inline-flex; }
  .nav-menu{
    display:none;
    position:absolute;
    right: 20px;
    top: 62px;
    flex-direction: column;
    background: rgba(11,15,23,0.92);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 10px;
    width: min(280px, calc(100vw - 40px));
  }
  .nav-menu.show{ display:flex; }
}