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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  background: #f0f4f8;
  color: #2d3748;
  line-height: 1.65;
}

nav {
  background: #ffffff;
  border-bottom: 1px solid #dde3ea;
  padding: 14px 28px;
  display: flex;
  align-items: center;
  gap: 4px;
}

nav .brand {
  font-weight: 700;
  font-size: 17px;
  color: #1a73e8;
  margin-right: auto;
  text-decoration: none;
}

nav a {
  color: #444;
  text-decoration: none;
  margin-left: 20px;
  font-size: 14px;
  font-weight: 500;
}

nav a:hover { color: #1a73e8; }

main {
  max-width: 740px;
  margin: 44px auto;
  padding: 0 20px;
}

.card {
  background: #fff;
  border-radius: 10px;
  padding: 36px 40px;
  box-shadow: 0 1px 6px rgba(0,0,0,0.07);
  margin-bottom: 28px;
}

.card h1 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 10px;
  color: #1a202c;
}

.card h2 {
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 8px;
  color: #1a202c;
}

.card p {
  margin-bottom: 14px;
  font-size: 15px;
  color: #4a5568;
}

.card ul, .card ol {
  margin: 0 0 14px 20px;
  font-size: 15px;
  color: #4a5568;
}

.card ul li, .card ol li { margin-bottom: 6px; }

form { margin-top: 24px; }

form label {
  display: block;
  margin-bottom: 5px;
  font-size: 13px;
  font-weight: 600;
  color: #555;
  letter-spacing: 0.02em;
}

form input[type="email"],
form input[type="password"],
form input[type="text"] {
  width: 100%;
  padding: 10px 13px;
  border: 1px solid #cbd5e0;
  border-radius: 5px;
  margin-bottom: 18px;
  font-size: 14px;
  color: #2d3748;
  background: #fafafa;
  transition: border-color 0.15s;
}

form input:focus {
  outline: none;
  border-color: #1a73e8;
  background: #fff;
}

form button {
  width: 100%;
  padding: 12px;
  background: #1a73e8;
  color: #fff;
  border: 0;
  border-radius: 5px;
  font-size: 15px;
  font-weight: 600;
  transition: background 0.15s;
}

form button:hover { background: #155ec4; }

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 4px;
}

@media (max-width: 600px) {
  .features { grid-template-columns: 1fr; }
  .card { padding: 24px 20px; }
  nav { flex-wrap: wrap; }
}

.feature {
  background: #fff;
  padding: 22px 20px;
  border-radius: 8px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.feature h3 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 8px;
  color: #1a202c;
}

.feature p { font-size: 13px; color: #718096; margin-bottom: 0; }

.faq-item { margin-bottom: 22px; }

.faq-item h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
  color: #2d3748;
}

.faq-item p { font-size: 14px; color: #4a5568; margin-bottom: 0; }

.contact-block { margin-bottom: 18px; }

.contact-block h3 {
  font-size: 14px;
  font-weight: 700;
  color: #2d3748;
  margin-bottom: 4px;
}

.contact-block p { font-size: 14px; color: #4a5568; margin-bottom: 0; }

footer {
  text-align: center;
  padding: 28px 20px;
  color: #a0aec0;
  font-size: 13px;
  margin-top: 20px;
}