:root {
  --bg: #f7f8fb;
  --text: #182033;
  --card: #ffffff;
  --accent: #3157ff;
  --muted: #5b6475;
}

body.dark {
  --bg: #10131a;
  --text: #f4f7fb;
  --card: #1b2130;
  --accent: #8da2ff;
  --muted: #c4cad6;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.site-header {
  background: var(--card);
  border-bottom: 1px solid rgba(0,0,0,0.08);
  position: sticky;
  top: 0;
}

nav {
  max-width: 980px;
  margin: auto;
  padding: 1rem;
  display: flex;
  gap: 1rem;
  align-items: center;
}

.logo {
  margin-right: auto;
  font-weight: 800;
  color: var(--accent);
}

a {
  color: var(--text);
  text-decoration: none;
}

a:focus, button:focus, input:focus, textarea:focus {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

main {
  max-width: 980px;
  margin: auto;
  padding: 2rem 1rem;
}

.hero {
  padding: 4rem 1rem;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2rem, 6vw, 4rem);
  margin-bottom: 1rem;
}

.hero p {
  color: var(--muted);
  max-width: 620px;
  margin: 0 auto 1.5rem;
}

button {
  border: 0;
  border-radius: 999px;
  padding: 0.85rem 1.2rem;
  background: var(--accent);
  color: white;
  cursor: pointer;
  font-weight: 700;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

article, .price-box, .contact {
  background: var(--card);
  border-radius: 16px;
  padding: 1.25rem;
  box-shadow: 0 8px 25px rgba(0,0,0,0.08);
}

.pricing, .contact {
  margin-top: 2rem;
}

.price-box strong {
  display: block;
  font-size: 2.5rem;
  color: var(--accent);
}

form {
  display: grid;
  gap: 1rem;
}

label {
  display: grid;
  gap: 0.35rem;
  font-weight: 700;
}

input, textarea {
  width: 100%;
  padding: 0.8rem;
  border: 1px solid #cbd2df;
  border-radius: 10px;
  font: inherit;
}

textarea {
  min-height: 120px;
}

#formStatus {
  color: var(--accent);
  font-weight: 700;
}

footer {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--muted);
}

@media (max-width: 720px) {
  nav { flex-wrap: wrap; }
  .cards { grid-template-columns: 1fr; }
}