:root{--bg:#0b0d12;--bg-2:#12151d;--bg-3:#1a1e29;--line:#2a3040;--line-2:#363d4f;
--fg:#eceae4;--muted:#9aa3b3;--muted-2:#6a7383;--orange:#ff6a19;--orange-2:#ff8a3d;--orange-deep:#ff5a00;
--scarlet:#f35d4d;--scarlet-2:#ff6f60;--glow:rgba(255,106,25,.16);
--ff-display:"Rubik","Segoe UI",sans-serif;--ff-body:"Manrope","Segoe UI",system-ui,sans-serif;--maxw:1080px;color-scheme:dark}
*{box-sizing:border-box}html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--fg);font-family:var(--ff-body);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
img{max-width:100%;display:block}a{color:inherit;text-decoration:none}
h1,h2,h3{font-family:var(--ff-display);font-weight:800;margin:0;line-height:1.15;letter-spacing:-.01em}
.wrap{max-width:var(--maxw);margin:0 auto;padding-inline:20px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5em;font-family:var(--ff-display);text-transform:uppercase;letter-spacing:.04em;font-weight:700;font-size:.98rem;padding:.9em 1.9em;border-radius:7px;cursor:pointer;border:1px solid transparent;transition:.5s}
.btn-primary{background:var(--scarlet);color:#fff}.btn-primary:hover{filter:brightness(1.2)}
.btn-ghost{background:rgba(255,255,255,.03);border-color:var(--line-2);color:#fff}.btn-ghost:hover{border-color:var(--scarlet);color:var(--scarlet)}
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:50;background:rgba(11,13,18,.82);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.top-inner{display:flex;align-items:center;gap:22px;height:72px}
.brand img{height:36px;width:auto}
.top-nav{display:flex;align-items:center;gap:8px;margin-left:auto}
.top-nav a.link{font-family:var(--ff-display);text-transform:uppercase;letter-spacing:.05em;font-size:.9rem;font-weight:600;color:var(--muted);padding:.5em .8em}
.top-nav a.link:hover{color:var(--fg)}
.crumbs{font-size:.84rem;color:var(--muted-2);padding-block:22px 6px;font-family:var(--ff-display);font-weight:500}
.crumbs a:hover{color:var(--orange-2)}.crumbs span{color:var(--muted)}
.page-head{padding-block:14px 10px}
.page-head .eyebrow{font-family:var(--ff-display);text-transform:uppercase;letter-spacing:.2em;font-size:.78rem;color:var(--orange);font-weight:600}
.page-head h1{font-size:clamp(2rem,5vw,3.1rem);margin-top:12px}
.page-head p.lead{color:#c6cbd4;font-size:1.1rem;margin:16px 0 0;max-width:72ch}
/* hub cards */
.class-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:18px;margin-block:36px}
.class-card{display:flex;flex-direction:column;gap:12px;background:var(--bg-2);border:1px solid var(--line);border-radius:14px;padding:24px;transition:border-color .2s,transform .2s}
.class-card:hover{border-color:var(--orange);transform:translateY(-4px)}
.class-card .ic{width:54px;height:54px;border-radius:12px;background:var(--glow);border:1px solid var(--line-2);display:grid;place-items:center;font-size:1.7rem}
.class-card h3{font-size:1.4rem;color:var(--orange-2)}
.class-card .role{font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-family:var(--ff-display);font-weight:600}
.class-card p{color:var(--muted);font-size:.92rem;margin:0;flex:1}
.class-card .more{font-family:var(--ff-display);font-weight:700;text-transform:uppercase;font-size:.8rem;letter-spacing:.05em;color:var(--orange-2)}
.diff{display:inline-block;font-size:.72rem;font-weight:700;padding:3px 9px;border-radius:20px;font-family:var(--ff-display);letter-spacing:.04em}
.diff.low{background:rgba(87,176,110,.14);color:#6cc487;border:1px solid rgba(87,176,110,.3)}
.diff.mid{background:rgba(255,138,61,.12);color:var(--orange-2);border:1px solid rgba(255,138,61,.3)}
.diff.high{background:rgba(243,93,77,.12);color:var(--scarlet-2);border:1px solid rgba(243,93,77,.3)}
/* article */
.article{display:grid;grid-template-columns:1fr 300px;gap:40px;align-items:start;margin-block:30px 20px}
.article .body h2{font-size:1.6rem;margin:36px 0 12px;color:var(--fg)}
.article .body h2:first-child{margin-top:0}
.article .body p{color:#c6cbd4;margin:0 0 14px}
.article .body ul{color:#c6cbd4;margin:0 0 16px;padding-left:22px}
.article .body li{margin-bottom:6px}
.article .body strong{color:var(--fg)}
.sidebar{position:sticky;top:96px;display:flex;flex-direction:column;gap:18px}
.factbox{background:var(--bg-2);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.factbox .fh{padding:16px 20px;border-bottom:1px solid var(--line);font-family:var(--ff-display);font-weight:800;font-size:1.05rem}
.factrow{display:flex;justify-content:space-between;gap:14px;padding:12px 20px;border-bottom:1px solid var(--line);font-size:.9rem}
.factrow:last-child{border-bottom:none}
.factrow span{color:var(--muted)}.factrow b{color:var(--fg);text-align:right;font-weight:600}
.pc{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:20px 0}
.pc .box{border:1px solid var(--line);border-radius:12px;padding:18px 20px;background:var(--bg-2)}
.pc .box h3{font-size:1.05rem;margin-bottom:10px}
.pc .pros h3{color:#6cc487}.pc .cons h3{color:var(--scarlet-2)}
.pc ul{margin:0;padding-left:20px;color:#c6cbd4;font-size:.92rem}
.related{border-top:1px solid var(--line);margin-top:10px;padding-top:30px}
.related h2{font-size:1.3rem;margin-bottom:16px}
.rel-grid{display:flex;gap:12px;flex-wrap:wrap}
.rel-grid a{background:var(--bg-2);border:1px solid var(--line-2);border-radius:8px;padding:10px 16px;font-family:var(--ff-display);font-weight:600;font-size:.9rem;transition:border-color .2s,color .2s}
.rel-grid a:hover{border-color:var(--orange);color:var(--orange-2)}
.cta-box{background:linear-gradient(135deg,var(--bg-3),var(--bg-2));border:1px solid var(--orange);border-radius:14px;padding:26px;text-align:center;margin-top:30px}
.cta-box h3{font-size:1.4rem;margin-bottom:8px}
.cta-box p{color:var(--muted);margin:0 0 18px}
.note{background:var(--glow);border:1px solid rgba(255,106,25,.4);border-radius:10px;padding:12px 16px;font-size:.88rem;color:var(--orange-2);margin:24px 0}
.foot{border-top:1px solid var(--line);background:var(--bg-2);padding-block:40px;margin-top:60px}
.foot-inner{display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between}
.foot img{height:34px}.foot-copy{color:var(--muted-2);font-size:.84rem}
.socials{display:flex;gap:10px}
.socials a{width:42px;height:42px;border-radius:9px;border:1px solid var(--line-2);background:var(--bg-3);display:grid;place-items:center;color:var(--muted);transition:border-color .2s,color .2s}
.socials a svg{width:20px;height:20px;fill:currentColor}.socials a:hover{border-color:var(--orange);color:var(--orange-2)}
@media (max-width:860px){.article{grid-template-columns:1fr}.sidebar{position:static;order:-1}.pc{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}
:focus-visible{outline:2px solid var(--orange-2);outline-offset:2px}