:root { color-scheme: dark; font-family: "Noto Sans JP", "Yu Gothic", sans-serif; color: #eaf9ff; background: #020a18; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: radial-gradient(circle at 50% 0, #0b518a 0, #061d43 30%, #020a18 70%); line-height: 1.8; }
a { color: #83e8ff; text-underline-offset: 3px; }
a:hover { color: #fff17a; }
.site-header { border-bottom: 1px solid #39748e; background: rgba(2, 13, 31, .88); }
.site-header-inner { width: min(1000px, calc(100% - 32px)); min-height: 74px; margin: auto; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { color: #fff3a4; text-decoration: none; font-weight: 900; letter-spacing: .04em; }.brand span { color: #75e5ff; }
.site-nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px 16px; }.site-nav a { font-size: 13px; font-weight: 700; }
main { width: min(900px, calc(100% - 32px)); margin: 42px auto 60px; }
.hero { margin-bottom: 22px; padding: 34px clamp(20px, 5vw, 52px); border: 3px solid #d6a348; background: linear-gradient(145deg, rgba(12, 54, 92, .98), rgba(4, 20, 46, .98)); box-shadow: inset 0 0 0 2px #62c8e6, 0 18px 36px #0008; }
.eyebrow { margin: 0; color: #7de2fa; font-size: 12px; font-weight: 800; letter-spacing: .2em; }.hero h1 { margin: 8px 0 10px; color: #fff3a4; font-size: clamp(30px, 6vw, 52px); line-height: 1.2; }.hero > p:last-child { margin: 0; color: #bedce6; }
.content { display: grid; gap: 16px; }.panel { padding: 24px clamp(18px, 4vw, 34px); border: 1px solid #39748e; background: rgba(5, 27, 54, .9); box-shadow: 0 12px 24px #0005; }.panel h2 { margin: 0 0 10px; color: #fff17a; font-size: 22px; }.panel h3 { margin: 22px 0 4px; color: #9beeff; font-size: 17px; }.panel p { margin: 8px 0; color: #d2e8ef; }.panel ul, .panel ol { margin: 10px 0; padding-left: 1.5em; }.panel li + li { margin-top: 7px; }.note { padding: 13px 16px; border-left: 4px solid #f1bd4c; background: #f1bd4c14; color: #f5e5b9; }
.cycle { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 18px 0; text-align: center; }.cycle b { padding: 13px 5px; border: 1px solid #4c8395; background: #071f39; }.cycle b:nth-child(1) { color: #9cddff; }.cycle b:nth-child(2) { color: #f1cb79; }.cycle b:nth-child(3) { color: #7edff5; }
.cta { display: inline-block; margin-top: 12px; padding: 11px 20px; color: #2a1905; border: 2px solid #fff4a6; background: linear-gradient(#fff57d, #e89c2e); text-decoration: none; font-weight: 900; }
.timeline article { padding: 0 0 20px 22px; border-left: 2px solid #4e90a7; }.timeline article:last-child { padding-bottom: 0; }.timeline time { color: #79e4ff; font-size: 12px; font-weight: 800; }.timeline h2 { margin: 2px 0 5px; }
.data-table { width: 100%; border-collapse: collapse; }.data-table th, .data-table td { padding: 11px; border: 1px solid #35687b; text-align: left; vertical-align: top; }.data-table th { width: 28%; color: #fff17a; background: #08233d; }
.site-footer { padding: 28px 16px; text-align: center; border-top: 1px solid #2c5d73; background: #010713; color: #83a7b4; font-size: 12px; }.site-footer nav { margin-bottom: 8px; }.site-footer a { margin: 0 7px; }
@media (max-width: 680px) { .site-header-inner { padding: 13px 0; align-items: flex-start; flex-direction: column; gap: 8px; }.site-nav { justify-content: flex-start; gap: 5px 12px; }.site-nav a { font-size: 11px; } main { margin-top: 24px; }.hero { padding: 25px 18px; }.panel { padding: 20px 16px; }.cycle { grid-template-columns: 1fr; }.data-table th, .data-table td { display: block; width: 100%; }.data-table th { border-bottom: 0; } }