:root{--navy:#1F3A5F;--cream:#FAF6EE;--ink:#22303f;--muted:#5b6b7c;--line:#e5dccb}
*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--cream);color:var(--ink);line-height:1.6}
a{color:var(--navy)}.wrap{max-width:760px;margin:0 auto;padding:0 20px}
header{border-bottom:1px solid var(--line)}header .wrap{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;flex-wrap:wrap;gap:8px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--navy)}.brand img{height:34px}
.brand strong{font-size:1.3rem;letter-spacing:.01em}.by{font-size:.78rem;color:var(--muted)}.by a{color:var(--muted)}
nav a{margin-left:16px;text-decoration:none;font-size:.95rem}
main{padding:40px 0 56px}h1{color:var(--navy);font-size:2rem;line-height:1.2;margin:.2em 0}h2{color:var(--navy);margin-top:2em}
.lead{font-size:1.15rem;color:var(--muted)}.btn{display:inline-block;background:var(--navy);color:var(--cream);padding:10px 18px;border-radius:10px;text-decoration:none;font-weight:600}
.tag{font-style:italic;color:var(--muted)}.note{background:#fff;border-left:4px solid var(--navy);padding:12px 16px;border-radius:6px}
footer{border-top:1px solid var(--line);color:var(--muted);font-size:.9rem;padding:24px 0}
@media(max-width:560px){h1{font-size:1.6rem}nav a{margin:0 12px 0 0}}