:root {
  --bg: #f6f8fc;
  --surface: rgba(255, 255, 255, 0.92);
  --surface-strong: #ffffff;
  --text: #152238;
  --muted: #52627c;
  --line: rgba(21, 34, 56, 0.12);
  --accent: #2f6fed;
  --accent-soft: rgba(47, 111, 237, 0.12);
  --shadow: 0 18px 50px rgba(21, 34, 56, 0.08);
 }

 * {
  box-sizing: border-box;
 }

 html, body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top left, rgba(47, 111, 237, 0.12), transparent 34%),
    radial-gradient(circle at top right, rgba(0, 169, 157, 0.08), transparent 26%),
    var(--bg);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
 }

 body {
  padding: 32px 16px 56px;
 }

 .page {
  max-width: 920px;
  margin: 0 auto;
 }

 .topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
 }

 .brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
 }

 .brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: linear-gradient(145deg, var(--accent), #59a1ff);
  display: grid;
  place-items: center;
  color: white;
  font-weight: 800;
  box-shadow: var(--shadow);
 }

 .brand-title {
  display: block;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: -0.02em;
 }

 .brand-subtitle {
  display: block;
  font-size: 0.88rem;
  color: var(--muted);
 }

 .back-link {
  text-decoration: none;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.95rem;
 }

 .hero {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 28px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
 }

 .kicker {
  margin: 0 0 8px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.76rem;
  font-weight: 800;
 }

 h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
 }

 .summary {
  margin: 14px 0 0;
  max-width: 68ch;
  color: var(--muted);
  font-size: 1.03rem;
 }

 .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
 }

 .pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--surface-strong);
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
 }

 .content {
  display: grid;
  gap: 18px;
  margin-top: 22px;
 }

 .section {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 22px 24px;
  box-shadow: var(--shadow);
 }

 .section h2 {
  margin: 0 0 10px;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
 }

 .section p {
  margin: 0 0 12px;
  color: var(--muted);
 }

 .section p:last-child {
  margin-bottom: 0;
 }

 .section ul {
  margin: 0 0 12px;
  padding-left: 20px;
  color: var(--muted);
 }

 .section li {
  margin-bottom: 10px;
 }

 .callout {
  background: linear-gradient(180deg, rgba(47, 111, 237, 0.1), rgba(47, 111, 237, 0.04));
  border: 1px solid rgba(47, 111, 237, 0.16);
 }

 .footer {
  margin-top: 20px;
  text-align: center;
  color: var(--muted);
  font-size: 0.92rem;
 }

 a {
  color: var(--accent);
 }

 @media (max-width: 640px) {
  body {
    padding: 18px 12px 40px;
  }

  .hero,
  .section {
    padding: 20px;
    border-radius: 20px;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }
 }