:root{color-scheme:light dark;--ink:#123133;--muted:#557174;--brand:#087f7b;--soft:#eaf8f6;--line:#cfe8e4;--bg:#f7fbfa}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.75;color:var(--ink);background:var(--bg)}main,footer{max-width:860px;margin:auto;padding:28px 22px}header{background:linear-gradient(135deg,#086f6b,#14a39b);color:white;padding:54px 22px}header>div{max-width:860px;margin:auto}h1{font-size:clamp(2rem,6vw,3.5rem);line-height:1.1;margin:0 0 14px}h2{margin-top:2.4rem;line-height:1.3}.lead{font-size:1.15rem;max-width:690px}.card{background:white;border:1px solid var(--line);border-radius:20px;padding:22px;margin:18px 0;box-shadow:0 8px 28px #074b4412}.note{background:var(--soft);border-left:4px solid var(--brand);padding:14px 16px;border-radius:10px}a{color:var(--brand);font-weight:650}.buttons{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}.button{display:inline-block;background:white;color:#08716d;padding:11px 17px;border-radius:999px;text-decoration:none}.button.alt{background:#d8f4ef}.nav{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:18px}.nav a{text-decoration:none}footer{font-size:.9rem;color:var(--muted);border-top:1px solid var(--line)}ul{padding-left:1.3rem}@media(prefers-color-scheme:dark){:root{--ink:#e8f5f3;--muted:#a8c3c0;--brand:#65d8cf;--soft:#123a38;--line:#315552;--bg:#0e201f}.card{background:#172b2a;box-shadow:none}.button{color:#075e5a}header{background:linear-gradient(135deg,#064e4b,#087f79)}}