/* 3D 오락실 — 읽는 페이지(가이드·소개) 공용 스타일 */
:root {
  --bg: #0b0d1a; --card: #151832; --neon-pink: #ff4fd8; --neon-cyan: #37e6ff;
  --neon-yellow: #ffd93b; --text: #eef0ff; --dim: #9aa0c8;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  background: var(--bg);
  background-image: radial-gradient(ellipse 80% 50% at 50% -10%, rgba(255,79,216,.15), transparent);
  color: var(--text);
  font-family: 'Segoe UI', 'Malgun Gothic', sans-serif;
  padding-bottom: 60px; line-height: 1.85;
}
header.page { text-align: center; padding: 46px 16px 6px; }
header.page h1 {
  margin: 0; font-size: clamp(24px, 5vw, 38px); font-weight: 900; letter-spacing: 1px;
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-pink));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
header.page .lead { color: var(--dim); font-size: 15px; margin-top: 8px; }
.back {
  display: inline-block; margin-top: 16px; color: var(--neon-cyan); text-decoration: none;
  border: 1px solid rgba(55,230,255,.4); border-radius: 999px; padding: 6px 18px; font-size: 14px;
}
.back:hover { background: rgba(55,230,255,.12); }
main { max-width: 760px; margin: 26px auto 0; padding: 0 20px; }
section.card {
  background: var(--card); border: 1px solid rgba(255,255,255,.08);
  border-radius: 18px; padding: 22px 26px; margin-bottom: 20px;
}
h2 { font-size: 21px; margin: 0 0 10px; }
h3 { font-size: 16px; margin: 22px 0 6px; color: var(--neon-yellow); }
p, li { color: var(--dim); font-size: 15px; margin: 0 0 10px; }
ul, ol { padding-left: 20px; margin: 0 0 10px; }
strong { color: var(--text); }
a { color: var(--neon-cyan); }
table { width: 100%; border-collapse: collapse; margin: 6px 0 14px; font-size: 14px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid rgba(255,255,255,.08); color: var(--dim); }
th { color: var(--text); font-weight: 700; white-space: nowrap; }
.play {
  display: inline-block; margin-top: 6px; padding: 11px 28px; border-radius: 10px;
  font-weight: 800; text-decoration: none; color: #fff;
  background: linear-gradient(90deg, var(--neon-pink), #b44fff);
  box-shadow: 0 4px 16px rgba(255,79,216,.3);
}
.tocList { display: grid; gap: 12px; }
.tocItem {
  display: block; text-decoration: none; color: inherit;
  border: 1px solid rgba(255,255,255,.1); border-radius: 14px; padding: 16px 18px;
  transition: border-color .15s, transform .15s;
}
.tocItem:hover { border-color: rgba(55,230,255,.5); transform: translateY(-2px); }
.tocItem b { display: block; font-size: 17px; color: var(--text); margin-bottom: 3px; }
.tocItem span { font-size: 14px; color: var(--dim); }
footer { text-align: center; margin-top: 46px; color: var(--dim); font-size: 13px; }
footer a { color: var(--dim); }