:root{--bg:#f6f8fb;--fg:#1d2a3a;--card:#fff;--line:#dde4ee;--navy:#214f78;--mut:#5b6b7f;--pr:#fff7e0}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#0f1720;--fg:#e8eef5;--card:#17212d;--line:#2a3a4c;--navy:#6fa8dc;--mut:#9fb0c3;--pr:#2a2410}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.85 system-ui,-apple-system,"Hiragino Sans",sans-serif}
header{background:#214f78;color:#fff;padding:18px 16px}header a{color:#fff;text-decoration:none;font-weight:700}
.wrap{max-width:760px;margin:0 auto;padding:0 16px}main{padding:24px 0 48px;overflow-wrap:anywhere;word-break:normal}
h1{font-size:26px;line-height:1.45;margin:8px 0 6px}h2{font-size:21px;margin:36px 0 10px;padding-bottom:4px;border-bottom:2px solid var(--navy)}h3{font-size:18px;margin:24px 0 6px}
a{color:var(--navy)}.meta{color:var(--mut);font-size:14px}.pr{background:var(--pr);border:1px solid var(--line);border-radius:8px;padding:6px 12px;font-size:14px;margin:12px 0}
ul,ol{padding-left:1.4em}li{margin:4px 0}table{border-collapse:collapse;width:100%;font-size:15px;display:block;overflow-x:auto}td,th{border:1px solid var(--line);padding:6px 8px;text-align:left}
code{background:var(--card);border:1px solid var(--line);border-radius:4px;padding:0 4px;font-size:.9em}
pre{max-width:100%;background:var(--card);border:1px solid var(--line);border-radius:8px;padding:12px 14px;overflow-x:auto;font-size:14px;line-height:1.6}pre code{border:0;padding:0;background:none;font-size:inherit}
.ad{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:12px;margin:24px 0;text-align:center}.ad .lbl{display:block;color:var(--mut);font-size:12px;text-align:left}.ad img{max-width:100%;height:auto}
main p img{display:block;max-width:100%;height:auto;margin:16px auto;border:1px solid var(--line);border-radius:10px;background:#fff}
.tools{background:var(--card);border:2px solid var(--navy);border-radius:10px;padding:12px 16px;margin:28px 0}.tools b{display:block;margin-bottom:4px}
.rel{margin:28px 0}.rel b{display:block;margin-bottom:4px}
.line{background:var(--card);border:2px solid #06c755;border-radius:12px;padding:14px 16px;margin:28px 0}.line p{margin:0 0 10px;font-size:15px}.line small{display:block;color:var(--mut);font-size:12px;margin-top:8px}
.line a.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:8px 20px;border-radius:999px;background:#06c755;color:#fff;font-weight:700;text-decoration:none}
.lead{margin:4px 0 16px}
.jump{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0 20px;padding:0;list-style:none}.jump li{margin:0}
.jump a{display:inline-flex;align-items:center;min-height:44px;padding:6px 14px;border:1px solid var(--navy);border-radius:999px;background:var(--card);color:var(--navy);text-decoration:none;font-size:15px;font-weight:600}
.jump a:hover,.jump a:focus-visible{background:var(--navy);color:var(--card)}.jump .n{margin-left:6px;font-weight:400;opacity:.8;font-size:13px}
.freetools{background:var(--card);border:2px solid var(--navy);border-radius:12px;padding:12px 16px;margin:0 0 24px}.freetools b{display:block;margin-bottom:6px}
.freetools ul{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:0}.freetools li{margin:0}
.freetools a{display:inline-flex;align-items:center;min-height:44px;padding:6px 12px;border-radius:8px;background:var(--bg);border:1px solid var(--line);text-decoration:none;font-weight:600;font-size:15px}
.freetools a:hover,.freetools a:focus-visible{border-color:var(--navy);text-decoration:underline}
.topic{scroll-margin-top:12px}.topic h2{display:flex;justify-content:space-between;align-items:baseline;gap:8px}.topic h2 .n{color:var(--mut);font-size:14px;font-weight:400}
.cards{display:grid;gap:14px;margin:12px 0 8px}
a.card{display:flex;flex-direction:column;gap:6px;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;text-decoration:none;color:var(--fg);box-shadow:0 1px 2px rgba(20,40,70,.06);transition:border-color .15s,box-shadow .15s,transform .15s}
a.card:hover{border-color:var(--navy);box-shadow:0 4px 14px rgba(20,40,70,.14);transform:translateY(-1px)}
a.card:focus-visible{outline:3px solid var(--navy);outline-offset:2px}
.card .ttl{color:var(--navy);font-weight:700;font-size:18px;line-height:1.5;text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
.card .desc{margin:0;font-size:15px;line-height:1.7;color:var(--fg);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card .foot{display:flex;flex-wrap:wrap;align-items:center;gap:6px;margin-top:4px}
.chip{display:inline-block;font-size:12px;line-height:1.6;padding:1px 8px;border-radius:999px;background:var(--bg);border:1px solid var(--line);color:var(--mut)}
.card .go{margin-left:auto;display:inline-flex;align-items:center;min-height:44px;padding:6px 16px;border-radius:8px;background:var(--navy);color:var(--card);font-weight:700;font-size:15px;white-space:nowrap}
a.card:hover .go{filter:brightness(1.12)}
@media (prefers-reduced-motion:reduce){a.card{transition:none}a.card:hover{transform:none}}
footer{color:var(--mut);font-size:13px;border-top:1px solid var(--line);padding:16px 0 32px}