:root {
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  background: #070a18;
}

body {
  color: #eef1ff;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: #7fd6ff;
}

a:hover {
  color: #ff9ec4;
}

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 18px;
  background: rgba(7, 10, 24, 0.96);
  border-bottom: 1px solid #232b55;
}

.site-brand {
  color: #eef1ff;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.site-nav a {
  color: #b9c0e3;
  font-size: 13px;
  text-decoration: none;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 28px 18px 64px;
}

h1 {
  margin: 0 0 6px;
  font-size: 1.7rem;
  line-height: 1.25;
}

h2 {
  margin: 30px 0 8px;
  color: #ffd9e8;
  font-size: 1.15rem;
}

p,
li {
  color: #cdd3f0;
}

ul,
ol {
  padding-left: 1.25rem;
}

.meta {
  margin: 0 0 26px;
  color: #8f97c4;
  font-size: 0.86rem;
}

.note {
  margin: 22px 0;
  padding: 14px 16px;
  background: #141a35;
  border: 1px solid #2c3468;
  border-radius: 12px;
}

.btn {
  display: inline-block;
  padding: 9px 14px;
  background: #1b2244;
  border: 1px solid #2c3468;
  border-radius: 10px;
  color: #eef1ff;
  font: inherit;
  font-size: 14px;
  text-decoration: none;
  cursor: pointer;
}

.btn:hover {
  filter: brightness(1.15);
}

footer {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 18px 40px;
  color: #8f97c4;
  font-size: 0.82rem;
}

footer a {
  color: #b9c0e3;
}

code {
  padding: 1px 5px;
  background: #141a35;
  border: 1px solid #232b55;
  border-radius: 6px;
  color: #ffd9e8;
  font-size: 0.9em;
}