:root {
  --bg: #eef2f8;
  --card: #ffffff;
  --line: #dbe4f0;
  --text: #24324a;
  --muted: #6d7f9a;
  --accent: #4ca1de;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Segoe UI, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.web-shell {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr;
}

.web-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 1rem;
  background: rgba(255,255,255,.92);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}

.web-header .brand {
  font-weight: 800;
  letter-spacing: .02em;
}

.web-header nav {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
}

.web-header a {
  text-decoration: none;
  color: var(--text);
  background: #eaf0f8;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: .45rem .7rem;
  font-weight: 600;
}

.web-main {
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
  padding: 1rem;
  display: grid;
  gap: 1rem;
}

.hero-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1rem;
}

h1 {
  margin: 0;
  font-size: 2rem;
}

h2 {
  margin-top: 0;
}

p, li {
  color: var(--muted);
  line-height: 1.45;
}

.link-btn {
  display: inline-block;
  background: var(--accent);
  color: #fff !important;
  text-decoration: none;
  padding: .6rem .9rem;
  border-radius: 10px;
  font-weight: 700;
}

code {
  background: #eef3fb;
  border-radius: 6px;
  padding: .05rem .35rem;
}