:root{--bg:#f7f8f6;--card:#fff;--ink:#1d2421;--muted:#55605b;--brand:#0f4c5c;--accent:#e36414;--line:#d9dfdb;--warn:#fff4e5;--ok:#e8f4ef}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;font-size:17px;line-height:1.65;color:var(--ink);background:var(--bg)}
a{color:var(--brand)}
a:hover{color:var(--accent)}
.wrap{max-width:960px;margin:0 auto;padding:0 16px}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:#fff;padding:8px;z-index:10}
.site-header{background:var(--brand);color:#fff;position:sticky;top:0;z-index:5}
.header-inner{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;min-height:56px}
.brand{color:#fff;font-weight:800;font-size:1.3rem;text-decoration:none;letter-spacing:.5px}.brand span{color:#fbb02d}
.nav-toggle{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.6);border-radius:6px;padding:6px 12px;font-size:1rem}
#site-nav{width:100%;display:none}#site-nav.open{display:block}
#site-nav ul{list-style:none;margin:0;padding:0 0 12px}
#site-nav a{display:block;color:#fff;text-decoration:none;padding:10px 4px;border-top:1px solid rgba(255,255,255,.15)}
#site-nav a[aria-current=page]{font-weight:700;color:#fbb02d}
@media(min-width:860px){.nav-toggle{display:none}#site-nav{display:block;width:auto}#site-nav ul{display:flex;gap:14px;padding:0}#site-nav a{border:0;padding:6px 2px;font-size:.95rem}}
main{padding:24px 16px 40px}
h1{font-size:1.75rem;line-height:1.3;margin:.2em 0 .5em;color:var(--brand)}
h2{font-size:1.3rem;margin:1.6em 0 .5em;line-height:1.35}
h3{font-size:1.1rem;margin:1.2em 0 .4em}
.lead{font-size:1.08rem;color:var(--muted)}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:16px;margin:12px 0}
.grid{display:grid;gap:12px;grid-template-columns:1fr}
@media(min-width:640px){.grid{grid-template-columns:1fr 1fr}}
.grid .card{margin:0}
.card h3{margin-top:0}
.note{background:var(--warn);border-left:4px solid var(--accent);padding:12px 14px;border-radius:6px;margin:16px 0}
.src{font-size:.9rem;color:var(--muted)}
table{width:100%;border-collapse:collapse;font-size:.95rem}
th,td{border:1px solid var(--line);padding:8px;text-align:left;vertical-align:top}
th{background:#eef2ef}
.table-scroll{overflow-x:auto}
form .field{margin:12px 0}
label{display:block;font-weight:600;margin-bottom:4px}
.hint{display:block;font-weight:400;font-size:.88rem;color:var(--muted)}
input,select{width:100%;font-size:1rem;padding:10px;border:1px solid #b9c3be;border-radius:8px;background:#fff}
input:focus,select:focus{outline:2px solid var(--accent);outline-offset:1px}
button.primary{background:var(--accent);color:#fff;border:0;border-radius:8px;padding:12px 18px;font-size:1rem;font-weight:700;cursor:pointer;width:100%}
@media(min-width:640px){button.primary{width:auto}}
.result{background:var(--ok);border-radius:8px;padding:12px 14px;margin-top:14px}
.result dl{display:grid;grid-template-columns:1fr auto;gap:4px 12px;margin:0}
.result dd{margin:0;font-weight:700;text-align:right}
.error{color:#b00020;font-weight:600}
.tabs{display:flex;gap:6px;flex-wrap:wrap;margin:8px 0}
.tabs button{border:1px solid var(--brand);background:#fff;color:var(--brand);border-radius:20px;padding:6px 12px;font-size:.92rem;cursor:pointer}
.tabs button[aria-selected=true]{background:var(--brand);color:#fff}
.term{border-bottom:1px solid var(--line);padding:10px 0}
.term h3{margin:0 0 4px}
.tag{display:inline-block;font-size:.78rem;background:#eef2ef;border-radius:10px;padding:1px 8px;color:var(--muted)}
.site-footer{background:#e9ede9;border-top:1px solid var(--line);padding:20px 0;font-size:.92rem;color:var(--muted)}
.footer-links{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:6px 16px}
.disclaimer strong{color:var(--ink)}
code{background:#eef2ef;padding:1px 5px;border-radius:4px;font-size:.92em}