:root { --gold: #e9c878; --line: rgba(255,255,255,.1); --ink: #d9dcec; }
* { box-sizing: border-box; }
body { margin: 0; background: #07070d; color: var(--ink); line-height: 1.95;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", "Segoe UI", sans-serif; }
a { color: #8fc6ff; }
.top { border-bottom: 1px solid var(--line); background: rgba(10,12,22,.9); position: sticky; top: 0; backdrop-filter: blur(8px); z-index: 5; }
.top div { max-width: 760px; margin: 0 auto; padding: 14px 20px; display: flex; gap: 1.2em; align-items: baseline; font-size: .9rem; }
.top b { font-size: .8rem; letter-spacing: .25em; color: rgba(233,200,120,.8); font-weight: 600; }
.top a { text-decoration: none; opacity: .85; }
main { max-width: 760px; margin: 0 auto; padding: 36px 20px 80px; }
h1 { font-size: clamp(1.6rem, 5.6vw, 2.2rem); line-height: 1.45; margin: .2em 0 .3em; color: #fff; }
.meta { font-size: .85rem; opacity: .55; margin-bottom: 2.2em; }
h2 { font-size: 1.2rem; margin: 2.8rem 0 .7rem; padding-left: .65rem; border-left: 3px solid var(--gold); color: #fff; }
h3 { font-size: 1.02rem; margin: 1.9rem 0 .4rem; color: #fff; }
p, li { font-size: .97rem; }
ul, ol { padding-left: 1.3rem; } li { margin: .35rem 0; }
table { width: 100%; border-collapse: collapse; margin: 1rem 0; font-size: .92rem; }
th, td { border-bottom: 1px solid var(--line); padding: .6rem .4rem; text-align: left; vertical-align: top; }
th { color: #fff; white-space: nowrap; }
blockquote { margin: 1.2rem 0; padding: .1rem 0 .1rem 1rem; border-left: 2px solid rgba(143,198,255,.4); opacity: .9; }
pre { background: #0d1120; border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; overflow-x: auto; font-size: .85rem; line-height: 1.7; }
code { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: .9em; }
p code, li code { background: rgba(255,255,255,.07); padding: .1em .35em; border-radius: 4px; }
.cta { display: block; margin: 2.6rem 0 0; padding: 18px 20px; border-radius: 14px; text-align: center; text-decoration: none;
  background: linear-gradient(180deg, rgba(58,128,216,.22), rgba(39,96,170,.18)); border: 1px solid rgba(120,180,255,.35); color: #eaf2ff; }
.cta b { display: block; font-size: 1.05rem; margin-bottom: .2em; }
.cta span { font-size: .85rem; opacity: .75; }
.next { margin-top: 3rem; border-top: 1px solid var(--line); padding-top: 1.2rem; font-size: .92rem; }
.next a { display: block; margin: .45rem 0; }
footer { border-top: 1px solid var(--line); padding: 26px 20px 60px; text-align: center; font-size: .84rem; opacity: .65; }
footer a { margin: 0 .6em; }
.cards { display: grid; gap: 14px; margin-top: 1.4rem; }
.card { display: block; text-decoration: none; color: inherit; border: 1px solid var(--line); border-radius: 14px; padding: 16px 18px; background: rgba(255,255,255,.02); }
.card b { display: block; color: #fff; font-size: 1.02rem; margin-bottom: .3em; }
.card span { font-size: .9rem; opacity: .7; }
.card em { display: block; font-style: normal; font-size: .78rem; opacity: .45; margin-top: .5em; }