@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700&display=swap');

:root{
  --bg: #f7f9fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --accent: #3b82f6;
  --accent-2: #60a5fa;
  --radius: 14px;
  --shadow: 0 6px 20px rgba(16,24,40,0.06);
  --glass: rgba(255,255,255,0.6);
}

/* reset / base */
*{box-sizing:border-box}
html,body{height:100%}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:'Poppins',system-ui,-apple-system,Segoe UI,Roboto,"Helvetica Neue",Arial;
  background:var(--bg);
  color:var(--text);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  font-weight:400;
}

/* Top progress bar implemented as pseudo-element (no HTML changes needed) */
body::before{
  content:"";
  position:fixed;
  left:0;
  top:0;
  height:4px;
  width:var(--scroll, 0%);
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  z-index:9999;
  transition: width 120ms linear;
  pointer-events:none;
}

/* Header */
header{
  position:sticky;
  top:0;
  z-index:1000;
  background:var(--glass);
  backdrop-filter: blur(6px);
  border-bottom:1px solid rgba(15,23,42,0.04);
  padding:26px 18px;
  text-align:center;
}
h1{margin:0;font-size:1.9rem;line-height:1.05;font-weight:600;color:var(--text)}
.quote{margin:10px auto 0;color:var(--muted);font-style:italic;font-weight:300}

/* Nav */
nav{margin-top:18px}
nav ul{list-style:none;margin:0;padding:0;display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
nav a{
  color:var(--accent);
  text-decoration:none;
  padding:8px 12px;
  border-radius:10px;
  font-weight:600;
  transition:background .22s, transform .12s;
}
nav a:hover, nav a:focus{background:rgba(59,130,246,0.08);transform:translateY(-2px)}

/* Layout */
main{max-width:980px;margin:26px auto;padding:0 18px}
.intro{max-width:760px;margin:28px auto;text-align:center;color:var(--muted);font-size:1.06rem}

/* Sections as cards with reveal animation */
section{
  background:var(--card);
  margin:36px 0;
  padding:30px;
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  opacity:0;
  transform:translateY(30px);
  transition:opacity .7s ease, transform .7s cubic-bezier(.2,.9,.3,1);
  will-change:opacity,transform;
  overflow:hidden;
}
section.visible{
  opacity:1;
  transform:none;
}
h2{margin-top:0;font-size:1.5rem;color:var(--text);margin-bottom:12px}
h2::after{content:"";display:block;height:4px;width:56px;background:var(--accent);border-radius:8px;margin-top:12px;margin-bottom:18px;opacity:.15}

/* Images */
.profile-img{display:block;margin:16px auto 20px;max-width:240px;border-radius:12px;box-shadow:0 6px 18px rgba(16,24,40,0.06)}

/* Tables */
table{width:100%;border-collapse:collapse;margin-top:10px;font-size:0.95rem}
table th, table td{padding:10px;border:1px solid rgba(15,23,42,0.06);text-align:left}
table th{background:linear-gradient(180deg,#fff,#fbfdff);font-weight:600;color:var(--text)}

/* Footer */
footer{padding:28px;text-align:center;color:var(--muted);border-top:1px solid rgba(15,23,42,0.04);background:transparent;border-radius:0}

/* Small helpers */
.kv-row{display:flex;gap:12px;flex-wrap:wrap}
.kv{flex:1;min-width:160px}

/* Responsive */
@media (max-width:720px){
  h1{font-size:1.35rem}
  section{padding:20px;margin:22px 0;border-radius:12px}
  nav ul{gap:6px}
  .intro{padding:0 10px}
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce){
  *{transition:none!important;animation:none!important}
  body::before{transition:none}
}