:root{
  --brand-dark:#20343a;
  --brand-mid:#2f4f4f;
  --brand-light:#f4f7f8;

  --text-dark:#1f2933;
  --text-muted:#5b6770;

  --border-soft:#d9e2e8;
}

/* ---------- Global ---------- */

body{
  font-family:Arial,Helvetica,sans-serif;
  color:var(--text-dark);
  background:#ffffff;
}

/* ---------- Header ---------- */

.topbar{
  background:linear-gradient(135deg,var(--brand-dark),var(--brand-mid));
  color:white;
  padding:16px 0;
}

.brand{
  font-weight:700;
  color:white;
  text-decoration:none;
  display:flex;
  align-items:center;
  gap:10px;
}

.brand:hover{
  color:white;
  text-decoration:none;
}

.navlink{
  color:#dce8eb;
  margin-left:20px;
  text-decoration:none;
}

.navlink:hover{
  color:white;
  text-decoration:underline;
}

/* ---------- Hero ---------- */

.hero{
  background:var(--brand-light);
  padding:64px 0;
  border-bottom:1px solid #e7edf0;
}

.hero h1{
  font-size:2.3rem;
  font-weight:700;
}

.hero p{
  color:var(--text-muted);
  max-width:820px;
}

/* ---------- Sections ---------- */

.section{
  padding:64px 0;
}

.section-alt{
  background:#f4f7f8;
}

.section-title{
  font-size:1.9rem;
  font-weight:700;
  margin-bottom:12px;
}

.section-subtitle{
  color:var(--text-muted);
  margin-bottom:32px;
}

/* ---------- Cards ---------- */

.info-card{
  background:#fff;
  border:1px solid var(--border-soft);
  border-radius:14px;
  padding:28px 24px;
  height:100%;
  box-shadow:0 6px 18px rgba(31,41,51,0.04);
}

.info-card i{
  font-size:1.8rem;
  color:var(--brand-mid);
  margin-bottom:12px;
}

.info-card h4{
  font-size:1.15rem;
  font-weight:700;
}

.info-card p{
  color:var(--text-muted);
}

/* ---------- Panels ---------- */

.panel{
  background:#fff;
  border:1px solid var(--border-soft);
  border-radius:14px;
  padding:28px 24px;
  box-shadow:0 6px 18px rgba(31,41,51,0.04);
}

/* ---------- Lists ---------- */

.feature-list{
  list-style:none;
  padding-left:0;
}

.feature-list li{
  padding:10px 0;
  border-bottom:1px solid #edf2f5;
}

.feature-list i{
  color:var(--brand-mid);
  margin-right:10px;
}

/* ---------- CTA ---------- */

.cta-box{
  background:linear-gradient(135deg,#243f46,#31545a);
  color:white;
  border-radius:18px;
  padding:34px 28px;
  text-align:center;
}

.cta-box p{
  color:#dce8eb;
}

/* ---------- Footer ---------- */

.footer{
  border-top:1px solid #e7edf0;
  padding:30px 0;
  text-align:center;
  color:var(--text-muted);
}

.footer a{
  color:var(--text-muted);
  text-decoration:none;
  margin:0 6px;
}

.footer a:hover{
  color:var(--brand-dark);
  text-decoration:underline;
}

/* ---------- Test page icon colours ---------- */

.win-colour{
  color:deepskyblue;
}

.apple-colour{
  color:black;
}

.linux-colour{
  color:darkorange;
}

.malware-colour{
  color:deeppink;
}

/* ---------- Test page links ---------- */

a.link:link{
  color:black;
  text-decoration:none;
}

a.link:visited{
  color:darkorange;
  text-decoration:none;
}

a.link:hover{
  text-decoration:underline;
}