:root {
  --color-bg: #f4f7fc;
  --color-primary: #0066cc;
  --color-secondary: #42b5d4;
  --color-dark: #0b1e33;
  --color-muted: #65748a;
  font-family: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--color-bg);
  color: var(--color-dark);
  line-height: 1.6;
}

a {
  color: inherit;
}

.hero {
  background: linear-gradient(135deg, rgba(66, 181, 212, 0.18), rgba(0, 102, 204, 0.08));
  padding: 32px 0 40px;
}

.container {
  width: min(920px, 92vw);
  margin: 0 auto;
}

.hero__title {
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--color-dark);
}

.hero__brand {
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  font-size: 1rem;
  background: rgba(0, 102, 204, 0.12);
  border-radius: 999px;
  padding: 8px 16px;
}

.hero__title h1 {
  margin: 0;
  font-size: clamp(2rem, 3vw, 2.6rem);
}

.hero__meta {
  margin-top: 12px;
  color: rgba(11, 30, 51, 0.75);
}

.hero__back {
  margin-top: 24px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  font-weight: 500;
  color: var(--color-primary);
  box-shadow: 0 12px 24px rgba(0, 102, 204, 0.12);
}

.card {
  background: #fff;
  border-radius: 24px;
  box-shadow: 0 24px 60px rgba(13, 38, 59, 0.12);
  margin-top: -40px;
  padding: clamp(24px, 4vw, 44px);
  position: relative;
  z-index: 2;
}

.markdown {
  font-size: 1.05rem;
  color: var(--color-dark);
}

.markdown h1,
.markdown h2,
.markdown h3 {
  margin-top: 2.2em;
  color: var(--color-primary);
}

.markdown h1:first-child,
.markdown h2:first-child {
  margin-top: 0;
}

.markdown a {
  color: var(--color-primary);
  text-decoration: underline;
}

.markdown ul {
  padding-left: 1.2em;
}

.markdown blockquote {
  border-left: 4px solid rgba(0, 102, 204, 0.4);
  padding-left: 16px;
  color: var(--color-muted);
}

.footer {
  margin: 60px 0 40px;
  text-align: center;
  color: rgba(11, 30, 51, 0.55);
  font-size: 0.9rem;
}

@media (max-width: 640px) {
  .hero__title {
    flex-direction: column;
    align-items: flex-start;
  }
  .hero__back {
    margin-top: 18px;
  }
}