:root{--navy:#14304a;--ink:#1d2b38;--muted:#5d6e7c;--accent:#2563c9;--accent-d:#1b4fa6;--warm:#f2a541;--paper:#fbf9f5;--pale:#eef3fa;--line:#dfe5ec;--white:#fff;--ph:#fff3d6;--radius:16px;--shadow:0 14px 40px #14304a14}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.7 system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent-d)}
a:hover{color:var(--accent)}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--navy);color:#fff;padding:.6rem 1rem;z-index:99}
.skip-link:focus{left:1rem}
header{background:#fffffff2;backdrop-filter:blur(10px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.header-inner{width:min(1120px,calc(100% - 32px));margin:auto;height:68px;display:flex;align-items:center;justify-content:space-between;gap:1rem}
.brand{display:flex;align-items:center;gap:.6rem;text-decoration:none;color:var(--navy);font-weight:800;font-size:1.18rem;letter-spacing:-.01em}
.brand svg{width:34px;height:34px;flex:none}
.brand:hover{color:var(--navy)}
header nav{display:flex;gap:1.6rem}
header nav a{text-decoration:none;color:#3c5266;font-weight:700;font-size:.95rem}
header nav a:hover,header nav a[aria-current=page]{color:var(--accent)}
.menu{display:none;border:1px solid var(--line);background:#fff;border-radius:10px;font-size:1.3rem;line-height:1;padding:.45rem .65rem;color:var(--navy);cursor:pointer}
main{width:min(1120px,calc(100% - 32px));margin:auto;padding:1rem 0 4rem}
.crumb{display:flex;flex-wrap:wrap;gap:.45rem;color:var(--muted);font-size:.82rem;margin:1rem 0 .4rem;padding:0;list-style:none}
.crumb li+li::before{content:"›";margin-right:.45rem;color:#9aa8b4}
.crumb a{color:var(--muted)}
.eyebrow{display:inline-block;background:var(--pale);color:var(--accent-d);border-radius:99px;padding:.25rem .75rem;font-size:.74rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}
h1,h2,h3{color:var(--navy);line-height:1.2;letter-spacing:-.02em}
h1{font-size:clamp(2rem,4.6vw,3.1rem);margin:.6rem 0 .8rem;letter-spacing:-.035em}
h2{font-size:clamp(1.4rem,2.6vw,1.75rem);margin:2.4rem 0 .8rem;scroll-margin-top:90px}
h3{font-size:1.15rem;margin:1.6rem 0 .5rem}
strong{color:#0f2236}
/* Home */
.home-hero{display:grid;grid-template-columns:1.1fr .9fr;gap:2.5rem;align-items:center;padding:3rem 0 2.5rem}
.home-hero p.lead{font-size:1.15rem;color:var(--muted);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:1.4rem}
.btn{display:inline-flex;align-items:center;gap:.5rem;border-radius:12px;padding:.8rem 1.15rem;font-weight:800;text-decoration:none;border:2px solid transparent;font-size:.97rem;cursor:pointer;font-family:inherit;line-height:1.2}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-d);color:#fff}
.btn-ghost{border-color:var(--line);background:#fff;color:var(--navy)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent-d)}
.hero-art{background:linear-gradient(145deg,#e6eefb,#fdf3e2);border-radius:28px;padding:1.5rem;box-shadow:var(--shadow)}
.section-heading{display:flex;justify-content:space-between;align-items:end;gap:1rem;margin:3rem 0 1.2rem}
.section-heading h2{margin:0}
.section-heading p{margin:.3rem 0 0;color:var(--muted)}
.resource-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.1rem}
.resource{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.3rem;display:flex;flex-direction:column;gap:.5rem}
.resource b{color:var(--navy);font-size:1.08rem}
.resource span{color:var(--muted);font-size:.93rem}
.resource .btn{margin-top:auto;align-self:flex-start}
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.1rem}
.cat-card{background:var(--navy);color:#e3ecf5;border-radius:var(--radius);padding:1.5rem;text-decoration:none;display:flex;flex-direction:column;gap:.4rem}
.cat-card b{color:#fff;font-size:1.25rem}
.cat-card:hover{background:#1b3d5e;color:#fff}
.cat-card i{font-style:normal;color:var(--warm);font-weight:800;margin-top:.5rem}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:1.1rem}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;text-decoration:none;color:var(--ink);display:flex;flex-direction:column;transition:transform .15s,box-shadow .15s}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow);color:var(--ink)}
.card img{aspect-ratio:16/9;width:100%;object-fit:cover;background:var(--pale)}
.card-body{padding:1rem 1.1rem 1.2rem;display:flex;flex-direction:column;gap:.3rem}
.card-type{font-size:.72rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--accent-d)}
.card b{color:var(--navy);font-size:1.07rem;line-height:1.3}
.card-body span:last-child{color:var(--muted);font-size:.92rem;line-height:1.5}
/* Article */
.article-head{max-width:780px;padding:1rem 0 .5rem}
.article-head p.lead{font-size:1.12rem;color:var(--muted);margin:0}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:3rem;align-items:start;margin-top:1.5rem}
article{min-width:0;max-width:760px}
article p,article li{max-width:72ch}
article ul,article ol{padding-left:1.3rem}
article li{margin:.3rem 0}
.answer{background:#fff;border:1px solid var(--line);border-left:5px solid var(--accent);border-radius:var(--radius);padding:1.3rem 1.4rem;margin:0 0 1.5rem;box-shadow:var(--shadow)}
.answer>p:first-child{margin-top:0}
.answer>:last-child{margin-bottom:0}
.download-box{display:flex;flex-wrap:wrap;gap:.7rem;margin:1rem 0 .3rem}
.file-note{font-size:.85rem;color:var(--muted);margin:.4rem 0 0}
.example{background:#fff;border:1px solid var(--line);border-radius:var(--radius);margin:1.2rem 0 1.6rem;overflow:hidden}
.example-head{display:flex;justify-content:space-between;align-items:center;gap:.8rem;background:var(--pale);padding:.7rem 1rem;border-bottom:1px solid var(--line)}
.example-head b{font-size:.9rem;color:var(--navy)}
.copy-btn{background:var(--navy);color:#fff;border:0;border-radius:9px;padding:.45rem .85rem;font:700 .85rem system-ui,sans-serif;cursor:pointer;white-space:nowrap}
.copy-btn:hover{background:var(--accent)}
.copy-btn.done{background:#1f8a4c}
.example-body{padding:1.1rem 1.25rem;font-size:.97rem;line-height:1.65;white-space:pre-wrap;word-wrap:break-word;font-family:inherit;margin:0;color:var(--ink)}
.doc-example{padding:1.4rem 1.5rem;font-size:.95rem;line-height:1.6}
.doc-example h3{margin:0 0 .2rem;font-size:1.35rem}
.doc-example h4{margin:1.1rem 0 .3rem;font-size:.82rem;letter-spacing:.09em;text-transform:uppercase;color:var(--accent-d);border-bottom:1px solid var(--line);padding-bottom:.2rem}
.doc-example p{margin:.3rem 0}
.doc-example ul{margin:.2rem 0 .4rem}
.ph{background:var(--ph);border-radius:4px;padding:0 .2em;box-decoration-break:clone;-webkit-box-decoration-break:clone}
.legend{font-size:.85rem;color:var(--muted);margin:.4rem 0 1rem}
.legend .ph{color:var(--ink)}
.mistakes{list-style:none;padding:0!important}
.mistakes li{background:#fff;border:1px solid var(--line);border-radius:12px;padding:.8rem 1rem .8rem 2.6rem;position:relative;margin:.6rem 0}
.mistakes li::before{content:"✕";position:absolute;left:1rem;top:.8rem;color:#c2410c;font-weight:900}
.checklist{list-style:none;padding:0!important}
.checklist li{padding-left:1.8rem;position:relative}
.checklist li::before{content:"✓";position:absolute;left:0;color:#1f8a4c;font-weight:900}
table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;font-size:.94rem;margin:1rem 0}
th,td{text-align:left;padding:.65rem .8rem;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--pale);color:var(--navy)}
.table-wrap{overflow-x:auto}
.side{position:sticky;top:88px;display:flex;flex-direction:column;gap:1rem}
.toc{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1rem 1.1rem;display:flex;flex-direction:column;gap:.15rem}
.toc b{font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:.3rem}
.toc a{text-decoration:none;color:#334a5e;font-size:.88rem;padding:.25rem 0;line-height:1.35}
.toc a:hover{color:var(--accent)}
.side-note{background:var(--navy);color:#dbe6f0;border-radius:var(--radius);padding:1.1rem;font-size:.9rem}
.side-note b{color:#fff}
.side-note a{color:var(--warm);font-weight:700}
.related{margin-top:1rem}
.page-plain{max-width:760px}
.cat-intro{max-width:760px;padding:1rem 0}
.not-found{text-align:center;padding:4rem 0}
.notice-box{background:#fff8e6;border:1px solid #f1d79a;border-radius:12px;padding:.9rem 1rem;font-size:.93rem}
footer{background:var(--navy);color:#c7d5e2;padding:3rem 0 1.5rem;margin-top:2rem}
.footer-grid{width:min(1120px,calc(100% - 32px));margin:auto;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:2rem}
.footer-grid b{display:block;color:#fff;margin-bottom:.5rem}
.footer-grid a{display:block;color:#c7d5e2;text-decoration:none;font-size:.93rem;padding:.15rem 0}
.footer-grid a:hover{color:#fff}
.footer-grid .brand{color:#fff}
.footer-grid p{font-size:.92rem;margin:.6rem 0}
.copyright{width:min(1120px,calc(100% - 32px));margin:2rem auto 0;border-top:1px solid #ffffff22;padding-top:1rem;font-size:.82rem;color:#9fb2c4}
@media (max-width:960px){
.layout{grid-template-columns:1fr}
.side{position:static;order:-1}
.side .side-note{display:none}
.toc{display:none}
.resource-grid,.cards,.cat-grid{grid-template-columns:1fr 1fr}
.footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
.menu{display:block}
header nav{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;gap:0;padding:.5rem 16px 1rem}
header nav.open{display:flex}
header nav a{padding:.7rem 0;border-bottom:1px solid var(--line);font-size:1rem}
.home-hero{grid-template-columns:1fr;padding:1.5rem 0 1rem;gap:1.5rem}
.hero-art{max-width:420px}
}
@media (max-width:600px){
body{font-size:16px}
.resource-grid,.cards,.cat-grid,.footer-grid{grid-template-columns:1fr}
.section-heading{flex-direction:column;align-items:start}
.example-head{flex-wrap:wrap}
.doc-example,.example-body{padding:1rem}
.answer{padding:1.1rem}
}
@media print{header,footer,.side,.copy-btn,.related,.crumb{display:none!important}body{background:#fff}}