:root{--bg:#f5f7fb;--fg:#14213d;--muted:#5f6b85;--card:#fff;--line:#e3e8f2;--navy:#0b1b3a;--red:#ff3b3b;--green:#16a34a;--link:#0b5fd3;--shadow:0 6px 20px rgba(11,27,58,.08);--r:12px}
@media(prefers-color-scheme:dark){:root{--bg:#0a1429;--fg:#e8edf8;--muted:#9aa7c4;--card:#101c38;--line:#1f2d4f;--navy:#071127;--link:#7fb0ff;--shadow:0 6px 20px rgba(0,0,0,.35)}}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;overflow-x:hidden;font:15px/1.65 Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--fg);-webkit-font-smoothing:antialiased}
.wrap{max-width:1000px;margin:0 auto;padding:0 18px}.narrow{max-width:720px;margin:0 auto;padding:22px 18px 44px}
img{max-width:100%;height:auto}a{color:var(--link)}
code{background:var(--line);padding:1px 6px;border-radius:5px;font-size:.88em;word-break:break-all}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:#fff;color:#000;padding:8px;z-index:99}
.ico{width:18px;height:18px;flex:none}

/* header */
.site-header{background:var(--navy);position:relative;z-index:20;border-bottom:1px solid rgba(255,255,255,.07)}
.bar{display:flex;align-items:center;justify-content:space-between;height:54px}
.brand{display:flex;gap:9px;align-items:center;color:#fff;text-decoration:none;font-weight:600;font-size:1.05rem}
.brand b{color:var(--red)}.brand img{border-radius:8px;width:30px;height:30px}
.nav{display:flex;gap:2px}.nav a{color:#b9c4e0;text-decoration:none;padding:6px 13px;border-radius:7px;font-weight:500;font-size:.88rem;transition:.15s}
.nav a:hover{color:#fff;background:rgba(255,255,255,.07)}.nav a[aria-current]{color:#fff;background:rgba(255,59,59,.18);box-shadow:inset 0 -2px 0 var(--red)}
.menu{display:none;background:none;border:0;width:40px;height:40px;cursor:pointer;flex-direction:column;justify-content:center;gap:5px;align-items:center}
.menu span{display:block;width:20px;height:2px;background:#fff;transition:.25s}
.menu.x span:nth-child(1){transform:translateY(7px) rotate(45deg)}.menu.x span:nth-child(2){opacity:0}.menu.x span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* hero */
.hero{background:var(--navy);color:#fff;padding:34px 0 46px}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 170px;gap:34px;align-items:center}.hero-grid>*{min-width:0}
.eyebrow{display:inline-block;color:#ff8a8a;font-size:.76rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase}
h1{font-size:clamp(1.55rem,3.6vw,2.15rem);line-height:1.2;margin:.3em 0 .45em;font-weight:700;letter-spacing:-.01em}
h1 span{color:var(--red)}
.lead{font-size:1rem;color:var(--muted);max-width:620px;margin:0}.hero .lead,.page-hero .lead{color:#b9c4e0}
.cta{display:flex;gap:10px;flex-wrap:wrap;margin:18px 0 14px}.cta.center{justify-content:center}
.btn{display:inline-flex;align-items:center;gap:9px;text-decoration:none;font-weight:600;font-size:.92rem;border-radius:9px;padding:9px 18px;transition:.15s;cursor:pointer}
.btn-dl{background:var(--red);color:#fff;padding:9px 20px;box-shadow:0 6px 16px rgba(255,59,59,.3)}.btn-dl:hover{background:#ff5252;transform:translateY(-1px)}
.btn-dl .ico{width:22px;height:22px}.btn-dl span{display:flex;flex-direction:column;line-height:1.2;color:#fff}.btn-dl small{font-weight:500;opacity:.9;font-size:.7rem}
.btn-ghost{border:1.5px solid var(--link);color:var(--link);padding:7.5px 16px}.hero .btn-ghost{color:#fff;border-color:rgba(255,255,255,.3)}.hero .btn-ghost:hover{background:rgba(255,255,255,.08)}
.chips{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:0}
.chips li{display:flex;align-items:center;gap:6px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);padding:3px 11px;border-radius:99px;font-size:.78rem;color:#d5dcf0}.chips .ico{width:14px;height:14px}
.hero-card{text-align:center}.hero-card img{width:112px;height:112px;border-radius:26px;box-shadow:0 12px 28px rgba(0,0,0,.4)}
.hero-card .screen{display:none}.hero-card p{margin:12px 0 0;font-size:.8rem;color:#9fb0d6}
.page-hero{background:var(--navy);color:#fff;padding:22px 0 28px;border-bottom:3px solid var(--red)}
.page-hero h1{margin-top:.2em}

/* blog cards */
.page-hero.slim{padding:6px 0 22px}.page-hero.slim h1{font-size:1.6rem;margin:.1em 0 .2em}
.grid.posts{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.card.post{position:relative;display:flex;flex-direction:column;padding:16px 18px;overflow:hidden}
.card.post:before{content:"";position:absolute;left:0;top:0;right:0;height:3px;background:var(--red);transform:scaleX(0);transform-origin:left;transition:.25s}
.card.post:hover:before{transform:scaleX(1)}.card.post:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.post-top{display:flex;align-items:center;gap:8px;margin-bottom:8px}.post-top .small{margin-left:auto}
.pico{display:grid;place-items:center;width:30px;height:30px;border-radius:8px;background:rgba(255,59,59,.12);color:var(--red)}.pico .ico{width:16px;height:16px}
.card.post h3{font-size:1.02rem;line-height:1.35;margin:.1em 0 .3em}.card.post h3 a:after{content:"";position:absolute;inset:0}
.card.post p{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;font-size:.86rem;line-height:1.55}
.card.post .more{margin-top:auto;padding-top:8px;font-size:.84rem;font-weight:600;color:var(--red);text-decoration:none}
.card.post.first{grid-column:1/-1;flex-direction:column;background:linear-gradient(120deg,var(--card),rgba(255,59,59,.07));padding:22px 24px}
.card.post.first h3{font-size:1.4rem;max-width:720px}.card.post.first p{font-size:.95rem;max-width:720px;-webkit-line-clamp:4}
@media(max-width:820px){.grid.posts{grid-template-columns:1fr}}

/* stats */
.stats{margin-top:-20px;position:relative;z-index:2}
.statgrid{display:grid;grid-template-columns:repeat(4,1fr);background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow)}
.statgrid div{text-align:center;padding:11px 8px;border-right:1px solid var(--line)}.statgrid div:last-child{border:0}
.statgrid b{display:block;font-size:1.05rem;color:var(--red)}.statgrid span{font-size:.75rem;color:var(--muted)}

/* article */
.article{padding-top:26px;padding-bottom:44px}
.article section{margin-bottom:30px}
h2{font-size:1.28rem;line-height:1.3;margin:0 0 .55em;font-weight:700}
h2:before{content:"";display:inline-block;width:4px;height:.95em;background:var(--red);border-radius:2px;margin-right:10px;vertical-align:-.1em}
.post-body h2{margin-top:1.6em}
h3{font-size:1rem;line-height:1.3;margin:.2em 0 .35em}
p{margin:.6em 0}
.toc{display:flex;flex-wrap:wrap;gap:6px;align-items:center;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:9px 13px;margin-bottom:26px;font-size:.82rem}
.toc strong{margin-right:4px}.toc a{text-decoration:none;background:var(--bg);border:1px solid var(--line);padding:2px 10px;border-radius:99px;color:var(--fg)}.toc a:hover{border-color:var(--red);color:var(--red)}
.callout{background:var(--card);border:1px solid var(--line);border-left:3px solid var(--red);padding:10px 14px;border-radius:8px;font-size:.92rem}
.feat-grid,.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(250px,100%),1fr));gap:12px}
.feat{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:15px 16px;transition:.2s}
.feat:hover{border-color:var(--red);box-shadow:var(--shadow)}
.feat .ico{width:34px;height:34px;padding:8px;border-radius:9px;background:rgba(255,59,59,.12);color:var(--red);margin-bottom:6px}
.feat h3{font-size:.98rem}.feat p{margin:0;color:var(--muted);font-size:.88rem;line-height:1.5}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:15px 17px;transition:.2s}.card:hover{border-color:var(--red)}
.card h3 a{text-decoration:none;color:var(--fg)}.card p{color:var(--muted);margin:.25em 0;font-size:.9rem}
.card.wide{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;margin:20px 0}.card.wide h3{margin:0}
.tag{display:inline-block;font-size:.66rem;text-transform:uppercase;letter-spacing:.07em;font-weight:700;color:var(--red);background:rgba(255,59,59,.12);padding:2px 9px;border-radius:99px}
.small{font-size:.8rem;color:var(--muted)}
.table-wrap{overflow-x:auto;border-radius:var(--r);border:1px solid var(--line);background:var(--card)}
table{border-collapse:collapse;width:100%;font-size:.9rem}th,td{padding:8px 14px;text-align:left;border-bottom:1px solid var(--line)}tr:last-child th,tr:last-child td{border-bottom:0}
.spec th{width:32%;color:var(--muted);font-weight:600;background:rgba(127,140,200,.06)}
.post-body thead th{background:var(--navy);color:#fff}
.two{display:grid;grid-template-columns:1fr 1fr;gap:12px}.box{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:14px 17px}.box h3{margin-top:0}
.ticks,.crosses{list-style:none;padding:0;margin:.4em 0;font-size:.93rem}.ticks li,.crosses li{padding-left:24px;position:relative;margin:.35em 0}
.ticks li:before,.crosses li:before{position:absolute;left:0;top:0;font-weight:800}.ticks li:before{content:"✓";color:var(--green)}.crosses li:before{content:"✕";color:var(--red)}
.steps{list-style:none;counter-reset:s;padding:0;margin:0 0 14px}
.steps li{counter-increment:s;position:relative;padding:0 0 14px 44px}
.steps li:before{content:counter(s);position:absolute;left:0;top:0;width:30px;height:30px;border-radius:50%;background:var(--navy);color:#fff;border:2px solid var(--red);font-weight:700;display:grid;place-items:center;font-size:.85rem}
.steps li:after{content:"";position:absolute;left:14px;top:34px;bottom:4px;width:2px;background:var(--line)}.steps li:last-child:after{display:none}
.steps strong{font-size:.95rem}.steps p{margin:0;color:var(--muted);font-size:.88rem}
details{background:var(--card);border:1px solid var(--line);border-radius:9px;padding:9px 15px;margin:7px 0}details[open]{border-color:var(--red)}
summary{cursor:pointer;font-weight:600;font-size:.93rem;list-style:none;display:flex;justify-content:space-between;gap:12px}summary:after{content:"+";font-size:1.2rem;line-height:1;color:var(--red)}details[open] summary:after{content:"–"}
summary::-webkit-details-marker{display:none}details p{margin:.5em 0 0;color:var(--muted);font-size:.9rem}
.dl-card{display:flex;align-items:center;gap:16px;flex-wrap:wrap;background:var(--card);border:1px solid var(--line);border-left:4px solid var(--red);border-radius:var(--r);padding:16px 18px;box-shadow:var(--shadow);margin-bottom:26px}
.dl-card img{border-radius:18px;width:68px;height:68px}.dl-info{flex:1;min-width:190px}.dl-info h2{margin:0;font-size:1.15rem}.dl-info h2:before{display:none}.dl-info p{margin:.1em 0 0;color:var(--muted);font-size:.86rem}
.crumbs{font-size:.8rem;color:var(--muted);padding:10px 0 0}.crumbs a{color:var(--muted)}.crumbs i{margin:0 6px;opacity:.5;font-style:normal}
.post-body h1{color:var(--fg);font-size:clamp(1.5rem,3.4vw,2rem)}
.post-body p,.post-body li{font-size:.97rem}
.note{background:var(--card);border-left:3px solid var(--red);padding:10px 14px;margin:24px 0;border-radius:0 8px 8px 0;font-size:.92rem}

/* footer */
.site-footer{background:var(--navy);color:#a9b6d8;padding:34px 0 12px;font-size:.86rem}
.site-footer .cols{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:24px}.site-footer strong{color:#fff;display:block;margin-bottom:6px}.site-footer p{margin:.6em 0}
.site-footer a:not(.brand){display:block;color:#a9b6d8;text-decoration:none;margin:4px 0}.site-footer a:not(.brand):hover{color:#fff}
.copy{margin-top:22px;border-top:1px solid rgba(255,255,255,.08);padding-top:12px;font-size:.76rem}

@media(max-width:820px){
 .hero-grid{grid-template-columns:minmax(0,1fr)}.hero-card{display:none}.hero{padding:26px 0 38px}
 .statgrid{grid-template-columns:repeat(2,1fr)}.statgrid div:nth-child(2){border-right:0}.statgrid div:nth-child(-n+2){border-bottom:1px solid var(--line)}
 .two{grid-template-columns:1fr}.site-footer .cols{grid-template-columns:1fr 1fr}
 .menu{display:flex}.nav{display:none;position:absolute;top:54px;left:0;right:0;background:var(--navy);flex-direction:column;padding:8px 18px 14px;border-bottom:1px solid rgba(255,255,255,.1)}.nav.open{display:flex}
 .btn-dl{width:100%;justify-content:center}.cta .btn{flex:1 1 100%;justify-content:center}.dl-card .btn{width:100%}
}
@media(max-width:480px){.site-footer .cols{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}