:root{
  --fg:#111;         /* primary text */
  --bg:#fff;         /* page background */
  --muted:#666;      /* secondary text */
  --line:#e5e5e5;    /* subtle borders */
}

*{ box-sizing:border-box; }
html,body{ height:100%; }

html{
  font-family:'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  font-optical-sizing:auto;
}

body{
  margin:0;
  color:var(--fg);
  background:var(--bg);
  font-size:16px;
  line-height:1.6;
}

.container{
  max-width:980px;
  margin:0 auto;
  padding:0 24px;
}

header{
  border-bottom:1px solid var(--line);
  background:#fff;
  position:sticky;
  top:0;
  z-index:10;
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  padding:14px 0;
}

.brand img{ width:28px; height:auto; display:block; }
.brand span{ font-weight:700; letter-spacing:0.2px; }

nav{
  display:flex;
  gap:10px;
  padding-bottom:14px;
  flex-wrap:wrap;
}

nav a{
  display:inline-block;
  padding:8px 12px;
  text-decoration:none;
  color:var(--fg);
  border:1px solid transparent;
  border-radius:10px;
}

nav a.active{
  border-color:var(--line);
  font-weight:600;
}

main{ padding:32px 0 40px; }

.hero{
  text-align:center;
  padding:48px 12px 8px;
}

.hero img{ width:96px; height:auto; display:block; margin:0 auto 14px; }
h1{ margin:8px 0 6px; font-size:32px; line-height:1.2; }
p.lead{ color:var(--muted); margin:6px 0 0; }

.btn{
  display:inline-block;
  margin-top:16px;
  padding:10px 16px;
  border:1px solid var(--line);
  border-radius:10px;
  color:var(--fg);
  text-decoration:none;
}

.section{ margin-top:36px; }
.section h2{ margin:0 0 6px; font-size:22px; }
.grid{
  display:grid;
  gap:16px;
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
  margin-top:12px;
}

.card{
  border:1px solid var(--line);
  border-radius:14px;
  padding:16px;
}

footer{
  margin-top:48px;
  border-top:1px solid var(--line);
  padding:18px 0;
  color:var(--muted);
  font-size:14px;
}

a{ color:var(--fg); }