:root {
  --bg: #04050b; --ink: #eef2ff; --dim: #97a1c0; --line: rgba(120,160,255,0.22); --panel: rgba(12,17,34,0.7);
  --p: #29e6ff; --c: #ff2e9a; --y: #ffd23a; --r: #ff4a5e;
  --en: 'Orbitron', 'Zen Kaku Gothic New', sans-serif; --jp: 'Zen Kaku Gothic New', system-ui, sans-serif; --heavy: 'Dela Gothic One', 'Zen Kaku Gothic New', sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { background: var(--bg); }
body { font-family: var(--jp); color: var(--ink); line-height: 1.85; font-size: 15px; background: radial-gradient(ellipse at 15% 0%, rgba(41,230,255,0.10), transparent 55%), radial-gradient(ellipse at 90% 100%, rgba(255,46,154,0.10), transparent 55%), var(--bg); background-attachment: fixed; min-height: 100vh; }
a { color: var(--p); text-underline-offset: 3px; }
main { max-width: 760px; margin: 0 auto; padding: 48px 16px 24px; }
.eyebrow { font-family: var(--en); font-size: 11px; letter-spacing: 0.4em; color: var(--p); }
h1 { padding-right: 0.16em; font-family: var(--en); font-weight: 900; font-style: italic; font-size: clamp(30px, 8vw, 48px); line-height: 1.1; margin: 6px 0 4px; background: linear-gradient(180deg, #fff, #29e6ff 60%, #1a6fff); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { color: var(--dim); margin-bottom: 36px; }
/* 本人作のロゴ（image/logo-*.webp） */
h1.h-logo { background: none; margin: 10px 0 8px; line-height: 0; }
.logo { display: block; width: min(100%, 460px); height: auto; filter: drop-shadow(0 0 16px rgba(255,46,154,0.3)); }
.logo.sm { width: min(100%, 240px); margin-top: 4px; }
.lead-logo { display: inline-block; }
h2 { display: flex; align-items: center; gap: 12px; font-size: 20px; margin: 44px 0 14px; }
h2 .no { font-family: var(--en); font-weight: 900; font-size: 13px; color: var(--bg); background: var(--p); border-radius: 6px; padding: 2px 8px; }
h2.warn .no { background: var(--r); }
h3 { font-size: 16px; margin: 22px 0 6px; }
p { margin: 8px 0; }
.note { color: var(--dim); font-size: 13px; }
ol.steps { list-style: none; counter-reset: s; display: grid; gap: 10px; }
ol.steps li { counter-increment: s; position: relative; padding: 12px 14px 12px 52px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); }
ol.steps li::before { content: counter(s); position: absolute; left: 14px; top: 12px; width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; font-family: var(--en); font-weight: 900; font-size: 12px; background: var(--p); color: var(--bg); }
ol.steps b { display: block; }
.tbl { overflow-x: auto; border: 1px solid var(--line); border-radius: 12px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
tr:last-child td { border-bottom: 0; }
th { font-size: 12px; color: var(--dim); font-weight: 700; background: rgba(255,255,255,0.03); }
td b { font-family: var(--en); letter-spacing: 0.04em; }
.sp { font-family: var(--heavy); font-size: 18px; }
.box { border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; background: var(--panel); margin: 12px 0; }
.box.warn { border-color: rgba(255,74,94,0.55); }
.box h3 { margin-top: 0; }
ul { padding-left: 1.3em; }
li { margin: 3px 0; }
.actions { max-width: 760px; margin: 32px auto 0; padding: 0 16px; display: flex; gap: 10px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 12px 22px; border-radius: 12px; font-weight: 700; text-decoration: none; color: var(--bg); background: linear-gradient(90deg, var(--p), #8ff3ff); }
.btn.ghost { color: var(--ink); background: none; border: 1px solid var(--line); }
footer { max-width: 760px; margin: 36px auto 0; padding: 20px 16px 40px; font-size: 12px; color: var(--dim); text-align: center; }
footer a { color: var(--dim); }