/* Layout: one 68rem column, navy masthead band, document-control strips borrowed from the QKS PDFs */
:root{
  --navy:#0E2A47; --navy-2:#13385E; --green:#1F8A5B; --amber:#F5B700; --red:#B3261E;
  --bg:#F6F8FA; --surface:#FFFFFF; --fg:#13202E; --muted:#556575; --line:#D9E1E8; --tint:#EAF0F5;
  --on-navy:#FFFFFF; --on-navy-muted:#B9C8D4; --link:#145F9E; --green-fg:#1F8A5B;
  --display:"Archivo",Arial,sans-serif; --body:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Consolas,monospace;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0B1724; --surface:#112234; --fg:#E6EDF3; --muted:#9FB2C4; --line:#22384F; --tint:#16293D;
  --link:#7DBBF0; --green-fg:#4CC48A; color-scheme:dark}}
:root[data-theme="dark"]{--bg:#0B1724; --surface:#112234; --fg:#E6EDF3; --muted:#9FB2C4; --line:#22384F; --tint:#16293D;
  --link:#7DBBF0; --green-fg:#4CC48A; color-scheme:dark}

*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:400 17px/1.6 var(--body)}
a{color:var(--link)}
a:focus-visible,button:focus-visible{outline:3px solid var(--amber);outline-offset:2px}
h1,h2,h3{font-family:var(--display);line-height:1.12;text-wrap:balance;margin:0}
h1{font-weight:800;font-size:clamp(2.1rem,5vw,3.4rem);letter-spacing:-.015em}
h2{font-weight:800;font-size:clamp(1.5rem,3vw,2rem)}
h3{font-weight:700;font-size:1.15rem}
p{margin:0}
.wrap{max-width:68rem;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.lbl{font:600 .75rem/1.2 var(--body);letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}

/* masthead */
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:10;background:var(--navy)}
.top{background:var(--navy);color:var(--on-navy);position:sticky;top:env(safe-area-inset-top,0px);z-index:5}
.top .wrap{display:flex;align-items:center;gap:1.25rem;flex-wrap:wrap;padding-block:.7rem}
.brand{display:flex;align-items:center;gap:.75rem;color:var(--on-navy);text-decoration:none;font:800 clamp(1.25rem,2.6vw,1.6rem) var(--display);letter-spacing:-.01em}
.brand svg{width:clamp(46px,6vw,60px);height:auto;aspect-ratio:106/90}
.nav{display:flex;gap:.25rem 1.1rem;flex-wrap:wrap;margin-left:auto;align-items:center}
.nav a{color:var(--on-navy-muted);text-decoration:none;font-weight:600;font-size:.95rem}
.nav a:hover,.nav a[aria-current]{color:var(--on-navy)}
.nav a[aria-current]{box-shadow:inset 0 -3px 0 var(--amber)}
.btn{display:inline-flex;align-items:center;gap:.5rem;background:var(--amber);color:var(--navy)!important;font:700 .95rem var(--body);
  padding:.65rem 1.1rem;text-decoration:none;border:0;border-radius:2px}
.btn:hover{filter:brightness(1.05)}
.btn.ghost{background:transparent;color:var(--fg)!important;box-shadow:inset 0 0 0 2px var(--line)}
.nav .btn{padding:.45rem .85rem;font-size:.9rem}

/* hero */
.hero{background:var(--navy);color:var(--on-navy)}
.hero .wrap{padding-block:3.5rem 3rem;display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:2.5rem;align-items:center}
.hero p.lead{font-size:1.15rem;color:var(--on-navy-muted);max-width:36rem;margin-top:1rem}
.hero .a{color:var(--amber)}
.hero .ctas{display:flex;gap:.75rem;flex-wrap:wrap;margin-top:1.6rem}
.hero .btn.ghost{color:var(--on-navy)!important;box-shadow:inset 0 0 0 2px #2D4C6E}
.pdca{display:grid;grid-template-columns:1fr 1fr;gap:3px}
.pdca div{background:var(--navy-2);padding:1rem 1.1rem;min-height:7.2rem}
.pdca b{display:block;font:800 1.5rem var(--display)}
.pdca span{font-size:.85rem;color:var(--on-navy-muted)}
.pdca small{display:block;font:600 .7rem var(--body);letter-spacing:.1em;text-transform:uppercase;color:var(--on-navy-muted);margin-top:.35rem}

/* sections */
main section{padding-block:3rem}
.sec-h{display:flex;justify-content:space-between;align-items:baseline;gap:1rem;flex-wrap:wrap;margin-bottom:1.4rem}
.sec-h p{color:var(--muted);max-width:40rem;margin-top:.4rem}
.band{background:var(--tint)}
.grid{display:grid;gap:1.1rem;grid-template-columns:repeat(auto-fill,minmax(min(100%,19rem),1fr))}
.card{background:var(--surface);border:1px solid var(--line);padding:1.2rem 1.25rem;display:flex;flex-direction:column;gap:.55rem;min-width:0}
.card p{color:var(--muted);font-size:.95rem}
.card .more{margin-top:auto;font-weight:600;text-decoration:none}
.tag{display:inline-block;font:600 .7rem var(--body);letter-spacing:.1em;text-transform:uppercase;padding:.15rem .5rem;background:var(--tint);color:var(--muted)}
.tag.new{background:var(--amber);color:var(--navy)}
.tag.free{background:var(--green);color:#fff}

/* video card */
.vthumb{aspect-ratio:16/9;max-width:100%;background:var(--navy);color:#fff;display:flex;flex-direction:column;justify-content:flex-end;padding:1rem;position:relative;text-decoration:none}
.vthumb .t{font:800 1.35rem/1.1 var(--display)}
.vthumb .t em{font-style:normal;color:var(--amber)}
.vthumb .play{position:absolute;top:1rem;right:1rem;width:44px;height:44px;border-radius:50%;background:var(--amber);display:grid;place-items:center}
.vthumb .play::after{content:"";border-left:14px solid var(--navy);border-top:9px solid transparent;border-bottom:9px solid transparent;margin-left:4px}
.vthumb.short{aspect-ratio:9/16;max-height:22rem}

/* products table */
.tbl{overflow-x:auto;border:1px solid var(--line);background:var(--surface)}
table{border-collapse:collapse;width:100%;font-size:.95rem}
th,td{text-align:left;padding:.7rem .9rem;border-bottom:1px solid var(--line);vertical-align:top}
th{font:600 .72rem var(--body);letter-spacing:.1em;text-transform:uppercase;color:var(--muted);background:var(--tint)}
td.code{font-family:var(--mono);color:var(--muted);white-space:nowrap}
td.price{font-variant-numeric:tabular-nums;white-space:nowrap;font-weight:600}
tr:last-child td{border-bottom:0}
.filters{display:flex;gap:.5rem;flex-wrap:wrap;margin-bottom:1rem}
.filters button{font:600 .85rem var(--body);background:var(--surface);color:var(--fg);border:1px solid var(--line);padding:.4rem .8rem;cursor:pointer;border-radius:2px}
.filters button[aria-pressed="true"]{background:var(--navy);color:#fff;border-color:var(--navy)}

/* document-control strip */
.dc{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border:1px solid var(--line);background:var(--surface);margin-block:1.4rem}
.dc div{padding:.55rem .8rem;border-right:1px solid var(--line);min-width:0}
.dc div:last-child{border-right:0}
.dc .v{font:600 .95rem var(--mono);display:block}
@media (max-width:560px){.dc{grid-template-columns:1fr 1fr}.dc div:nth-child(2){border-right:0}.dc div:nth-child(-n+2){border-bottom:1px solid var(--line)}}

/* article */
.article{max-width:42rem}
.article h1{font-size:clamp(1.9rem,4.4vw,2.8rem)}
.article .standfirst{font-size:1.2rem;color:var(--muted);margin-top:.8rem}
.article h2{font-size:1.45rem;margin-top:2.2rem;margin-bottom:.6rem}
.article p,.article ul,.article ol{margin-bottom:1rem}
.article li{margin-bottom:.35rem}
.ex{border-left:4px solid var(--green);background:var(--surface);padding:1rem 1.2rem;margin-block:1.4rem}
.ex .lbl{color:var(--green-fg);display:block;margin-bottom:.35rem}
.callout{background:var(--navy);color:var(--on-navy);padding:1.5rem;display:flex;gap:1rem 1.5rem;align-items:center;flex-wrap:wrap;justify-content:space-between;margin-block:2rem}
.callout p{color:var(--on-navy-muted);max-width:30rem}
.callout h3{color:var(--on-navy)}

/* community */
.qa{background:var(--surface);border:1px solid var(--line);padding:1.1rem 1.25rem}
.qa summary{cursor:pointer;font:700 1.05rem var(--display);list-style:none;display:flex;gap:.75rem;align-items:baseline}
.qa summary::before{content:"Q";font:800 .85rem var(--mono);color:var(--amber);background:var(--navy);padding:.1rem .4rem}
.qa[open] summary{margin-bottom:.7rem}
.qa p{color:var(--fg);margin-bottom:.6rem}
.qa .meta{font-size:.8rem;color:var(--muted)}
.stack{display:flex;flex-direction:column;gap:.75rem}
.form{display:grid;gap:.8rem;background:var(--surface);border:1px solid var(--line);padding:1.25rem}
.form label{font-weight:600;font-size:.9rem;display:grid;gap:.3rem}
.form input,.form select,.form textarea{font:inherit;padding:.6rem .7rem;border:1px solid var(--line);background:var(--bg);color:var(--fg);border-radius:2px;width:100%}
.note{font-size:.85rem;color:var(--muted)}
.ok{background:var(--green);color:#fff;padding:.7rem 1rem;font-weight:600}

/* footer */
footer{background:var(--navy);color:var(--on-navy-muted);font-size:.88rem}
footer .wrap{padding-block:2.2rem;display:grid;gap:1.5rem;grid-template-columns:repeat(auto-fit,minmax(min(100%,14rem),1fr))}
footer a{color:var(--on-navy)}
footer b{color:var(--on-navy);font-family:var(--display)}
footer ul{list-style:none;margin:.5rem 0 0;padding:0;display:grid;gap:.3rem}
.legal{border-top:1px solid #2D4C6E}
.legal .wrap{display:block;padding-block:1rem;font-size:.78rem}

@media (max-width:820px){.hero .wrap{grid-template-columns:1fr}.nav{margin-left:0;width:100%}}
@media (prefers-reduced-motion:no-preference){.card,.vthumb{transition:transform .15s}.card:hover{transform:translateY(-2px)}}
main section.hero{padding-block:0}
@media (max-width:820px){.top{position:static}.hero .wrap{padding-block:2.2rem}}