:root {
  color-scheme: light dark;
  font-family: "Be Vietnam Pro", "Segoe UI", sans-serif;
  line-height: 1.6;
  font-weight: 400;
  color: #def5ff;
  background:
    radial-gradient(circle at top left, rgba(34, 211, 238, 0.18), transparent 28%),
    radial-gradient(circle at top right, rgba(244, 114, 182, 0.15), transparent 24%),
    linear-gradient(180deg, #07111f 0%, #040814 100%);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  padding: 40px 20px 56px;
}

.shell {
  max-width: 860px;
  margin: 0 auto;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  color: rgba(222, 245, 255, 0.75);
}

.brand {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.back-link {
  color: #86e9ff;
  text-decoration: none;
  font-weight: 600;
}

.card {
  background: linear-gradient(180deg, rgba(9, 22, 42, 0.96) 0%, rgba(7, 17, 31, 0.98) 100%);
  border: 1px solid rgba(103, 232, 249, 0.16);
  border-radius: 28px;
  box-shadow:
    0 0 0 1px rgba(103, 232, 249, 0.06),
    0 18px 45px rgba(2, 8, 20, 0.46),
    0 0 36px rgba(34, 211, 238, 0.08);
  padding: 28px 24px;
  backdrop-filter: blur(16px);
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.lede {
  margin: 0 0 28px;
  color: rgba(222, 245, 255, 0.72);
  max-width: 64ch;
}

h2 {
  margin: 28px 0 10px;
  font-size: 1.1rem;
}

p,
li {
  color: rgba(230, 247, 255, 0.88);
}

ul {
  padding-left: 20px;
}

a {
  color: #86e9ff;
}

.meta {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid rgba(103, 232, 249, 0.12);
  color: rgba(222, 245, 255, 0.72);
  font-size: 0.95rem;
}

@media (max-width: 640px) {
  body {
    padding: 24px 14px 40px;
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
    margin-bottom: 18px;
  }

  .card {
    padding: 22px 18px;
    border-radius: 22px;
  }
}