* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: #f4f6f8;
  color: #1f2937;
}
.hero {
  background: linear-gradient(135deg, #111827, #374151);
  color: white;
  text-align: center;
  padding: 1rem 1rem 3rem;
}
.top-nav {
  max-width: 1180px;
  margin: 0 auto 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
.logo { font-weight: 800; font-size: 1.15rem; }
.top-nav a, .footer-links a {
  color: inherit;
  text-decoration: none;
  font-weight: 700;
}
.hero h1 {
  font-size: clamp(2rem, 7vw, 4rem);
  margin: 1rem 0 .5rem;
}
.hero p { font-size: clamp(1rem, 3vw, 1.25rem); margin: 0; }
.grid {
  max-width: 1180px;
  margin: -2rem auto 2rem;
  padding: 0 1rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.card, .seo, .page-card {
  background: white;
  border-radius: 18px;
  box-shadow: 0 8px 24px rgba(0,0,0,.08);
}
.card { padding: 1.25rem; }
.card h2 { margin: 0 0 .5rem; font-size: 1.25rem; }
.one-liner {
  color: #4b5563;
  font-style: italic;
  line-height: 1.4;
  min-height: 42px;
}
input, select, textarea, button {
  width: 100%;
  padding: .85rem;
  margin: .4rem 0;
  border-radius: 10px;
  border: 1px solid #d1d5db;
  font-size: 1rem;
}
button {
  background: #111827;
  color: white;
  border: none;
  font-weight: 800;
  cursor: pointer;
}
button:hover { background: #374151; }
.result {
  min-height: 42px;
  background: #eef2ff;
  border-radius: 10px;
  padding: .75rem;
  font-weight: 800;
  line-height: 1.35;
}
.seo-text {
  color: #4b5563;
  font-size: .95rem;
  line-height: 1.55;
}
.seo, .page-card {
  max-width: 980px;
  margin: 1rem auto;
  padding: 1.5rem;
  line-height: 1.6;
}
footer {
  text-align: center;
  padding: 2rem 1rem;
  color: #4b5563;
}
.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
}
.footer-links a { color: #111827; }
.page-header {
  background: #111827;
  color: white;
  padding: 1rem;
}
.page-header nav {
  max-width: 980px;
  margin: auto;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}
.page-header a { color: white; text-decoration: none; font-weight: 700; }
@media (max-width: 900px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .top-nav { flex-direction: column; }
  .grid { grid-template-columns: 1fr; margin-top: -1.5rem; }
  .card { padding: 1rem; }
  .one-liner { min-height: auto; }
  .footer-links { flex-direction: column; }
}