:root{
  --bg:#f8fafc;
  --surface:#ffffff;
  --text:#0f172a;
  --muted:#475569;
  --line:rgba(15,23,42,.10);
  --primary:#0f766e;
  --primary-ink:#ffffff;
  --radius:16px;
  --shadow:0 14px 34px rgba(15,23,42,.08);
}

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

body{
  font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  background:
    radial-gradient(860px 420px at 10% 0%, rgba(15,118,110,.08), transparent 56%),
    radial-gradient(720px 420px at 100% 10%, rgba(15,23,42,.06), transparent 52%),
    var(--bg);
  color:var(--text);
}

a{color:inherit}

.container{
  width:min(1160px,100%);
  margin:0 auto;
  padding:0 16px;
}

.header{
  position:sticky;
  top:0;
  z-index:30;
  background:rgba(248,250,252,.88);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}

.header__inner{
  min-height:68px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
  font-weight:800;
  letter-spacing:-.3px;
}

.brand__mark{
  width:10px;
  height:10px;
  border-radius:999px;
  background:var(--primary);
  box-shadow:0 0 0 6px rgba(15,118,110,.10);
  flex:0 0 auto;
}

.brand__accent{color:var(--primary)}
.brand__text{
  display:inline-flex;
  align-items:baseline;
  gap:8px;
}

.brand__tag{
  display:none;
  color:var(--muted);
  font-size:12px;
  font-weight:700;
}

.nav{
  display:flex;
  align-items:center;
  gap:12px;
}

.nav__link{
  text-decoration:none;
  font-weight:600;
  color:var(--muted);
}

.nav__cta{
  color:var(--primary);
  font-weight:800;
}

.hero{
  padding:38px 0 22px;
}

.pill{
  display:inline-flex;
  align-items:center;
  padding:8px 12px;
  border-radius:999px;
  background:rgba(15,118,110,.08);
  color:var(--primary);
  font-size:12px;
  font-weight:800;
}

.hero__title{
  margin-top:14px;
  font-size:34px;
  line-height:1.1;
  letter-spacing:-.8px;
  max-width:760px;
}

.hero__subtitle{
  margin-top:10px;
  max-width:720px;
  color:var(--muted);
  font-size:15px;
  line-height:1.6;
}

.portfolio-list{
  padding:10px 0 44px;
}

.cards{
  display:grid;
  grid-template-columns:1fr;
  gap:14px;
}

.card{
  background:rgba(255,255,255,.86);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:18px;
  display:grid;
  gap:12px;
}

.card__title{
  font-size:18px;
  letter-spacing:-.3px;
}

.card__file{
  color:var(--muted);
  font-size:13px;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:100%;
  min-height:44px;
  text-decoration:none;
  font-weight:800;
  border-radius:12px;
  background:var(--primary);
  color:var(--primary-ink);
}

.floating-back{
  position:fixed;
  left:18px;
  bottom:18px;
  z-index:40;
  min-height:48px;
  padding:0 18px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:999px;
  background:var(--primary);
  color:var(--primary-ink);
  text-decoration:none;
  font-weight:800;
  box-shadow:0 18px 38px rgba(15,118,110,.28);
}

.floating-back:hover{
  filter:brightness(.96);
}

@media (min-width:700px){
  .cards{
    grid-template-columns:repeat(2,1fr);
  }
}

@media (min-width:960px){
  .brand__tag{display:inline}
  .hero{
    padding:52px 0 28px;
  }
  .hero__title{
    font-size:44px;
  }
  .cards{
    grid-template-columns:repeat(3,1fr);
    gap:16px;
  }
}