:root {
  --bg-color: #0b0b0b;
  --bg-color-light: #161616;
  --text-main: #f6f6f7;
  --text-muted: #a09fae;
  --accent-orange: #f39844;
  --accent-crimson: #be3156;
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  background: var(--bg-color);
  color: var(--text-main);
  font-family: Inter, sans-serif;
  line-height: 1.65;
}

.glow-bg {
  position: fixed;
  inset: -20% auto auto -10%;
  width: 60vw;
  height: 60vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(195, 43, 92, 0.12), transparent 65%);
  pointer-events: none;
  z-index: -1;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 5%;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(11, 11, 11, 0.82);
  backdrop-filter: blur(12px);
}

header img { display: block; height: 38px; width: auto; }
nav { display: flex; gap: 1.5rem; }
a { color: var(--accent-orange); }
nav a { color: var(--text-main); text-decoration: none; font-weight: 500; }
nav a:hover { color: var(--accent-orange); }

main { width: min(900px, calc(100% - 2.5rem)); margin: 0 auto; padding: 5rem 0; }
.eyebrow { color: var(--accent-orange); font-size: 0.8rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; }
h1 { margin: 0.5rem 0 1rem; font-size: clamp(2.25rem, 6vw, 4rem); line-height: 1.05; }
h2 { margin: 2.75rem 0 0.8rem; font-size: 1.35rem; }
p, li { color: var(--text-muted); }
strong { color: var(--text-main); }
ul { padding-left: 1.25rem; }
li + li { margin-top: 0.55rem; }

.intro, .notice {
  padding: 1.25rem 1.4rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.025);
}
.notice { border-color: rgba(243, 152, 68, 0.28); }
.intro p, .notice p { margin: 0; }
.meta { color: var(--text-muted); font-size: 0.9rem; }
.toc { columns: 2; padding-left: 1.25rem; }

footer {
  padding: 2rem 5%;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--text-muted);
  font-size: 0.9rem;
  text-align: center;
}

@media (max-width: 600px) {
  header { align-items: flex-start; flex-direction: column; }
  nav { gap: 1rem; }
  main { padding: 3rem 0; }
  .toc { columns: 1; }
}