:root{
  --bg: #0b1020;
  --panel: rgba(255,255,255,0.06);
  --text: rgba(255,255,255,0.92);
  --muted: rgba(255,255,255,0.68);
  --border: rgba(255,255,255,0.12);
  --shadow: 0 20px 60px rgba(0,0,0,0.35);
  --radius: 18px;
}

html[data-theme="light"]{
  --bg: #f6f7fb;
  --panel: rgba(0,0,0,0.04);
  --text: rgba(0,0,0,0.88);
  --muted: rgba(0,0,0,0.62);
  --border: rgba(0,0,0,0.10);
  --shadow: 0 16px 40px rgba(0,0,0,0.10);
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 20% -10%, rgba(255,255,255,0.12), transparent 60%),
              radial-gradient(900px 500px at 90% 10%, rgba(255,255,255,0.10), transparent 55%),
              var(--bg);
  color: var(--text);
  line-height: 1.65;
}

a{ color: inherit; text-decoration: none; }
.container{ width:min(1100px, 92%); margin: 0 auto; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.35), rgba(0, 0, 0, 0.06));
  border-bottom: 1px solid var(--border);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.topbar.scrolled {
  background: rgba(0, 0, 0, 0.8); /* Darken background when scrolled */
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}
.topbar__inner{
  display:flex;
  align-items:center;
  gap: 16px;
  padding: 12px 0;
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight: 700;
  letter-spacing: 0.2px;
}

.brand__dot{
  width: 12px; height: 12px; border-radius: 99px;
  background: currentColor;
  opacity: 0.9;
}

.nav{
  margin-left: auto;
  display:flex;
  gap: 14px;
  flex-wrap: wrap;
}

.nav a{
  font-size: 14px;
  opacity: 0.85;
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: opacity 0.3s ease;
}
/* New styles for sticky nav with transparency */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 10;
  background: rgba(0, 0, 0, 0.85); /* Default background */
  transition: background 0.3s ease;
}

.topbar.sticky {
  background: rgba(0, 0, 0, 0.7); /* Background when scrolling */
}

.topbar__inner {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 0;
  max-width: 1100px;
  margin: 0 auto;
}

body {
  margin-top: 60px; /* Ensure content doesn't hide behind the fixed navbar */
}


.topbar.scrolled .nav a {
  opacity: 0.8;
}
.nav a:hover{
  border-color: var(--border);
  background: var(--panel);
}

.btn{
  border: 1px solid var(--border);
  background: var(--text);
  color: var(--bg);
  padding: 10px 14px;
  border-radius: 999px;
  font-weight: 650;
  display:inline-flex;
  align-items:center;
  gap:8px;
  box-shadow: var(--shadow);
}

.btn--outline{
  background: transparent;
  color: var(--text);
  box-shadow: none;
}

.btn--ghost{
  background: transparent;
  color: var(--text);
  box-shadow: none;
  padding: 10px 12px;
}

.hero{
  display:grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 26px;
  padding: 44px 0 22px;
  align-items:center;
}

h1{
  margin:0 0 8px;
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.05;
}

.subtitle{
  margin: 0 0 18px;
  color: var(--muted);
  font-weight: 600;
}

.cta{ display:flex; gap: 12px; flex-wrap: wrap; }

.avatar{
  border-radius: var(--radius);
  overflow:hidden;
  border: 1px solid var(--border);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.avatar img{
  width:100%;
  height: 380px;
  object-fit: cover;
  display:block;
}

.section{
  padding: 26px 0;
}

.section h2{
  margin: 0 0 14px;
  font-size: 24px;
}

.grid{
  display:grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 14px;
}

.stack{ display:flex; flex-direction:column; gap: 14px; }

.card{
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: var(--radius);
  padding: 16px;
}

.card h3{
  margin: 0 0 6px;
  font-size: 18px;
}

.card__top{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 10px;
}

.muted{ color: var(--muted); margin: 0 0 6px; }
.meta{ color: var(--muted); margin: 0 0 10px; font-size: 14px; }

.pill{
  display:inline-flex;
  align-items:center;
  border: 1px solid var(--border);
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 13px;
  color: var(--muted);
  margin: 0;
}

.tags{
  display:flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag{
  border: 1px solid var(--border);
  background: var(--panel);
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 14px;
  color: var(--muted);
}

.link{
  display:inline-flex;
  margin-top: 8px;
  color: var(--text);
  opacity: 0.9;
  border-bottom: 1px dashed var(--border);
  padding-bottom: 2px;
  width: fit-content;
}

.footer{
  padding: 30px 0 50px;
  border-top: 1px solid var(--border);
  margin-top: 12px;
}

@media (max-width: 860px){
  .hero{ grid-template-columns: 1fr; }
  .nav{ display:none; }
  .avatar img{ height: 320px; }
  .grid{ grid-template-columns: 1fr; }
}