body {
  background: #f7f9fb;
  margin: 0;
  font-family: 'Segoe UI', Arial, sans-serif;
  color: #263041;
}
header {
  background: #263041;
  color: #fff;
  padding-top: 0.6em;
}
nav {
  display: flex;
  justify-content: center;
  gap: 30px;
  font-size: 1.16em;
  background: #19202d;
  padding: 16px 0;
}
nav a {
  color: #f4f9fc;
  text-decoration: none;
  padding: 7px 14px;
  border-radius: 2em;
  font-weight: 500;
  transition: background .22s;
}
nav a.active,
nav a:hover {
  background: #ffd347;
  color: #19202d;
}
.container {
  max-width: 750px;
  margin: 41px auto 24px auto;
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 3px 18px #dde5f2;
  padding: 37px 29px;
}
.center {
  text-align: center;
}
.avatar {
  border-radius: 50%;
  width: 125px;
  border: 4px solid #f7f9fb;
  margin-bottom: 1em;
}
h1 { margin-bottom: 0;}
h2 { color: #263041; margin-top: 0; }
h3 { margin-top: 0; }
a.main-btn {
  background: #4579b9;
  color: #fff;
  padding: 15px 32px;
  border-radius: 50px;
  display: inline-block;
  margin-top: 23px;
  font-size: 1.15em;
  text-decoration: none;
  transition: background .23s;
}
a.main-btn:hover { background: #ffc857; color:#263041;}
.project,
.featuredimg {
  margin-bottom: 23px;
}
.featuredimg {
  display: block;
  max-width: 100%;
  margin: 20px auto 0 auto;
  border-radius: 11px;
  box-shadow: 0 2px 13px #dde5f2;
}
ul { padding-left: 22px;}
form { display: flex; flex-direction: column; max-width:420px; margin: 20px 0;}
input, textarea {
  padding: 11px;
  margin-bottom: 15px;
  border: 1px solid #dbe1ea;
  border-radius: 6px;
  font-size: 1em;
  font-family: inherit;
}
button {
  padding: 13px;
  background: #4579b9;
  color:#fff;
  font-weight:700;
  font-size: 1.1em;
  border:none;
  border-radius:7px;
  cursor:pointer;
  transition: background .17s;
}
button:hover { background: #ffd347; color: #19202d;}
footer {
  background: #263041;
  color: #fff;
  padding: 17px 0 9px 0;
  text-align: center;
  font-size: 0.98em;
  margin-top: 28px;
  border-top: 3px solid #305178;
}
@media (max-width: 800px) {
  .container { max-width: 98vw; padding: 13vw 3vw;}
  nav { font-size: 1em; gap: 10px;}
}