:root { --bg: #14161b; --fg: #e6e6e6; --muted: #9aa0aa; --card: #1d2027; --accent: #e8716d; }
* { box-sizing: border-box; }
body { margin: 0; padding: 0 20px 48px; background: var(--bg); color: var(--fg);
       font: 16px/1.6 "Segoe UI", Roboto, "Noto Sans JP", sans-serif; }
header { max-width: 880px; margin: 0 auto; padding: 36px 0 20px; }
.logo { color: var(--fg); text-decoration: none; font-weight: 700; font-size: 1.3rem; }
.tagline { color: var(--muted); margin: 6px 0 0; }
.grid { max-width: 880px; margin: 0 auto; display: grid; gap: 16px;
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }
.card { display: block; background: var(--card); border-radius: 10px; padding: 18px;
        color: inherit; text-decoration: none; border: 1px solid transparent; }
a.card:hover { border-color: var(--accent); }
.card h2 { font-size: 1.05rem; margin: 8px 0; }
.card p { color: var(--muted); margin: 0 0 12px; }
.muted { opacity: .6; }
.tag { font-size: .75rem; text-transform: uppercase; letter-spacing: .06em; color: var(--accent); }
.meta { font-size: .8rem; color: var(--muted); }
.post { max-width: 720px; margin: 0 auto; }
.post h1 { font-size: 1.6rem; }
table { border-collapse: collapse; width: 100%; margin: 12px 0; }
th, td { border-bottom: 1px solid #2c3039; padding: 8px; text-align: left; }
.back a, footer { color: var(--muted); }
footer { max-width: 880px; margin: 40px auto 0; font-size: .85rem; }