:root{color-scheme:light;--ink:#202124;--muted:#666b73;--paper:#f6f7f9;--line:#e2e5e9;--blue:#2867c7;--white:#fff}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:system-ui,-apple-system,"Hiragino Kaku Gothic ProN","Noto Sans JP",sans-serif;-webkit-font-smoothing:antialiased}.site-header{height:64px;display:flex;align-items:center;justify-content:space-between;padding:0 max(24px,calc((100vw - 1000px)/2));border-bottom:1px solid var(--line);background:var(--white)}a{color:inherit;text-decoration:none}.site-label{font-size:13px;font-weight:750;letter-spacing:.12em}.header-link{font-size:13px;color:var(--muted)}main{max-width:1000px;margin:auto;padding:50px 24px 72px}.intro{margin:0 0 24px}.intro h1{margin:0;font-size:32px;letter-spacing:-.03em}.intro p{margin:8px 0 0;color:var(--muted);font-size:14px}.ad-slot{display:grid;place-items:center;min-height:104px;margin:24px 0;border:1px dashed #c8cdd4;border-radius:8px;background:#f1f2f4;color:#858b94;font-size:11px;letter-spacing:.08em}.tools{margin:30px 0}.tool-card{display:flex;gap:20px;align-items:flex-start;padding:24px;border:1px solid var(--line);border-radius:10px;background:var(--white)}.tool-icon{display:grid;place-items:center;flex:0 0 48px;height:48px;border-radius:9px;background:#eef2f8;color:var(--blue);font-size:22px;font-weight:700}.tool-copy{max-width:680px}.tool-type{margin:0 0 6px;color:var(--muted);font-size:12px}.tool-copy h2{margin:0;font-size:20px}.tool-copy h2 a:hover,.tool-link:hover{color:var(--blue);text-decoration:underline}.tool-copy>p:not(.tool-type){margin:10px 0;color:var(--muted);font-size:14px;line-height:1.75}.tool-link{display:inline-flex;gap:10px;margin-top:2px;color:var(--blue);font-size:14px;font-weight:650}footer{display:flex;align-items:center;justify-content:space-between;padding:20px max(24px,calc((100vw - 1000px)/2));border-top:1px solid var(--line);background:var(--white);color:var(--muted);font-size:12px}footer nav{display:flex;gap:8px;align-items:center}footer a:hover{color:var(--ink);text-decoration:underline}@media(max-width:600px){main{padding-top:34px}.intro h1{font-size:28px}.tool-card{gap:14px;padding:18px}.tool-copy{min-width:0}.tool-copy h2{font-size:18px}footer{gap:12px;align-items:flex-start;flex-direction:column}}