:root {
  --bg: #f4f7fb;
  --panel: #ffffff;
  --ink: #24344d;
  --muted: #6e7e97;
  --line: #dbe4f0;
  --accent: #2f80ed;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  background: linear-gradient(180deg, #f8fbff 0%, var(--bg) 100%);
  color: var(--ink);
}

.shell,
.doc-shell {
  width: min(960px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 40px 0 72px;
}

.hero {
  padding: 32px;
  border-radius: 28px;
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: 0 18px 50px rgba(40, 67, 110, 0.08);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 4vw, 3rem);
}

.copy,
.meta,
p {
  color: var(--muted);
  line-height: 1.7;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.card,
section {
  display: block;
  padding: 24px;
  border-radius: 24px;
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: 0 18px 50px rgba(40, 67, 110, 0.05);
  text-decoration: none;
  color: inherit;
}

.doc-shell section {
  margin-top: 16px;
}

h2 {
  margin-top: 0;
  font-size: 1.15rem;
}

.back-link {
  display: inline-block;
  margin-bottom: 20px;
  color: var(--accent);
  text-decoration: none;
  font-weight: 700;
}