/* FaceIndex guide design system v2 — sharper, cleaner, professional */
:root{--bg:#050d14;--bg2:#08151f;--panel:#0b1a26;--panel2:#0f2231;--line:#183446;--line2:#244b61;--ink:#eef8fc;--text:#cfe0ea;--muted:#93aebd;--brand:#3fe0f0;--brand2:#1aa7ff;--accent:#3fe0f0;--ok:#4ade80;--warn:#fbbf24;--bad:#fb7185;--r:16px;--shadow:0 24px 60px -24px rgba(0,0,0,.65);--font:Inter,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;--head:Sora,Inter,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
*,*::before,*::after{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:radial-gradient(900px 480px at 85% -8%,color-mix(in srgb,var(--accent) 14%,transparent),transparent 70%),radial-gradient(700px 420px at -5% 4%,rgba(26,167,255,.10),transparent 70%),var(--bg);color:var(--text);font:400 17px/1.75 var(--font);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img,svg{max-width:100%;height:auto}a{color:var(--brand);text-decoration:underline;text-decoration-color:color-mix(in srgb,var(--brand) 40%,transparent);text-underline-offset:3px;transition:color .15s,text-decoration-color .15s}a:hover{color:#fff;text-decoration-color:var(--brand)}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px}::selection{background:color-mix(in srgb,var(--accent) 35%,transparent);color:#fff}
.skip{position:absolute;left:-999px;top:8px;background:var(--brand);color:#04141b;padding:10px 14px;border-radius:8px;z-index:100}.skip:focus{left:8px}
.wrap{width:min(1180px,calc(100% - 40px));margin-inline:auto}
/* header */
.hdr{position:sticky;top:0;z-index:50;background:rgba(5,13,20,.82);backdrop-filter:saturate(1.4) blur(14px);-webkit-backdrop-filter:saturate(1.4) blur(14px);border-bottom:1px solid var(--line)}
.hdr .wrap{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:74px}
.hdr .logo{display:block;flex:0 1 270px;min-width:150px}.hdr .logo img{display:block;width:100%;max-height:60px;object-fit:contain;object-position:left center}
.nav{display:flex;align-items:center;gap:6px}.nav a{color:var(--text);text-decoration:none;font:600 14px/1 var(--font);padding:10px 12px;border-radius:10px}.nav a:hover{background:var(--panel);color:#fff}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:13px 22px;border-radius:12px;font:700 15px/1.1 var(--font);text-decoration:none!important;background:linear-gradient(120deg,#5eeaf6,#1aa7ff);color:#031821!important;box-shadow:0 10px 28px -10px rgba(63,224,240,.6);transition:transform .15s,box-shadow .15s,filter .15s;border:0;cursor:pointer}
.btn:hover{transform:translateY(-2px);box-shadow:0 16px 34px -12px rgba(63,224,240,.75);filter:brightness(1.05)}
.btn.ghost{background:transparent;color:var(--ink)!important;border:1px solid var(--line2);box-shadow:none}.btn.ghost:hover{border-color:var(--brand);background:var(--panel)}
.btn.sm{min-height:40px;padding:10px 16px;font-size:14px}
/* hero */
.crumbs{font-size:14px;color:var(--muted);padding:22px 0 0}.crumbs a{color:var(--muted);text-decoration:none}.crumbs a:hover{color:#fff}.crumbs span{margin:0 7px;opacity:.5}
.hero{display:grid;grid-template-columns:1.08fr .92fr;gap:34px;align-items:center;padding:30px 0 40px}
.chip{display:inline-flex;align-items:center;gap:8px;font:700 12px/1 var(--font);letter-spacing:.12em;text-transform:uppercase;color:var(--accent);background:color-mix(in srgb,var(--accent) 10%,transparent);border:1px solid color-mix(in srgb,var(--accent) 35%,transparent);padding:9px 13px;border-radius:999px;text-decoration:none}
.chip::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px var(--accent)}
h1{font:800 clamp(2rem,4.2vw,3.3rem)/1.08 var(--head);letter-spacing:-.035em;color:#fff;margin:18px 0 16px;text-wrap:balance}
.sub{font-size:1.14rem;line-height:1.65;color:var(--text);max-width:60ch;margin:0 0 20px}
.meta{display:flex;flex-wrap:wrap;gap:8px 18px;color:var(--muted);font-size:14px;margin:0 0 24px}.meta b{color:var(--ink);font-weight:600}
.cta-row{display:flex;flex-wrap:wrap;gap:12px}
.hero-img{position:relative;border-radius:22px;overflow:hidden;border:1px solid var(--line2);box-shadow:var(--shadow);background:var(--panel)}
.hero-img img{display:block;width:100%;aspect-ratio:1200/630;object-fit:cover}
/* layout */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:44px;padding:18px 0 70px;align-items:start}
article{min-width:0}
article section{margin:0 0 46px}
h2{font:700 clamp(1.45rem,2.3vw,1.9rem)/1.2 var(--head);letter-spacing:-.025em;color:#fff;margin:0 0 16px;padding-left:16px;border-left:4px solid var(--accent);scroll-margin-top:96px;text-wrap:balance}
h3{font:700 1.1rem/1.3 var(--head);color:#fff;margin:0 0 6px}
article p{margin:0 0 18px}article strong{color:#fff;font-weight:650}
.lead-p{font-size:1.1rem;color:#e3f1f8}
.takeaways{background:linear-gradient(135deg,color-mix(in srgb,var(--accent) 12%,var(--panel)),var(--panel));border:1px solid color-mix(in srgb,var(--accent) 30%,var(--line));border-radius:var(--r);padding:24px 26px;margin:0 0 40px}
.takeaways h2{border:0;padding:0;font-size:1.15rem;margin-bottom:12px;color:var(--accent);letter-spacing:.02em}
.takeaways ul{margin:0;padding:0;list-style:none;display:grid;gap:12px}.takeaways li{position:relative;padding-left:30px;color:#e3f1f8}
.takeaways li::before{content:"✓";position:absolute;left:0;top:.2em;width:22px;height:22px;border-radius:50%;background:var(--accent);color:#03141b;font:800 13px/22px var(--font);text-align:center}
.steps{list-style:none;margin:0;padding:0;display:grid;gap:14px;counter-reset:s}
.steps li{counter-increment:s;position:relative;background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:20px 22px 20px 74px;transition:border-color .2s,transform .2s}
.steps li:hover{border-color:var(--line2);transform:translateY(-1px)}
.steps li::before{content:counter(s);position:absolute;left:20px;top:18px;width:38px;height:38px;border-radius:12px;display:grid;place-items:center;font:800 17px/1 var(--head);color:#04141b;background:linear-gradient(135deg,var(--accent),#fff 220%)}
.steps h3{margin-bottom:4px}.steps p{margin:0;color:var(--text)}
.checks{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:10px}
.checks li{display:flex;gap:12px;align-items:flex-start;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:13px 15px;font-size:15.5px;line-height:1.55}
.checks li::before{content:"";flex:none;width:20px;height:20px;margin-top:2px;border-radius:6px;border:2px solid var(--accent);background:color-mix(in srgb,var(--accent) 18%,transparent)}
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:var(--panel)}
table{width:100%;border-collapse:collapse;font-size:15.5px;min-width:560px}th,td{text-align:left;padding:14px 16px;vertical-align:top;border-bottom:1px solid var(--line)}
th{font:700 12px/1 var(--font);letter-spacing:.1em;text-transform:uppercase;color:var(--accent);background:var(--panel2)}tr:last-child td{border-bottom:0}td:first-child{color:#fff;font-weight:650;white-space:nowrap}
.mistakes{display:grid;gap:12px}.mistake{display:flex;gap:14px;background:linear-gradient(90deg,rgba(251,113,133,.10),transparent 70%),var(--panel);border:1px solid color-mix(in srgb,var(--bad) 28%,var(--line));border-radius:14px;padding:16px 18px}
.mistake::before{content:"!";flex:none;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;background:var(--bad);color:#2a0710;font:800 15px/1 var(--head)}.mistake p{margin:0}
.tip{border-left:3px solid var(--warn);background:rgba(251,191,36,.07);padding:16px 20px;border-radius:0 12px 12px 0;margin:20px 0}.tip b{display:block;color:var(--warn);font:700 12px/1 var(--font);letter-spacing:.12em;text-transform:uppercase;margin-bottom:8px}.tip p{margin:0}
.cta{border:1px solid color-mix(in srgb,var(--accent) 40%,var(--line));border-radius:20px;padding:30px;background:radial-gradient(500px 220px at 100% 0,color-mix(in srgb,var(--accent) 22%,transparent),transparent 70%),var(--panel);display:grid;gap:12px}
.cta h2{border:0;padding:0;margin:0}.cta p{margin:0;max-width:62ch}.cta .cta-row{margin-top:8px}
details{border-bottom:1px solid var(--line)}details:first-of-type{border-top:1px solid var(--line)}
summary{cursor:pointer;list-style:none;padding:18px 36px 18px 0;font:650 1.04rem/1.45 var(--head);color:#fff;position:relative}summary::-webkit-details-marker{display:none}
summary::after{content:"+";position:absolute;right:4px;top:14px;font:400 26px/1 var(--font);color:var(--accent);transition:transform .2s}details[open] summary::after{transform:rotate(45deg)}details p{padding:0 0 18px;margin:0}
.related{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.rcard{display:flex;flex-direction:column;background:var(--panel);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;text-decoration:none!important;transition:transform .2s,border-color .2s,box-shadow .2s}
.rcard:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:var(--shadow)}.rcard img{display:block;width:100%;aspect-ratio:1200/630;object-fit:cover}
.rcard span{display:block;padding:14px 16px 4px;font:700 11px/1 var(--font);letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}.rcard strong{display:block;padding:0 16px 16px;color:#fff;font:650 .98rem/1.4 var(--head)}
.more{margin:18px 0 0;padding:0;list-style:none;display:grid;gap:8px}.more a{font-size:15.5px}
.disclaimer{font-size:14px;color:var(--muted);border-top:1px solid var(--line);padding-top:20px;margin-top:10px}
/* sidebar */
.side{position:sticky;top:96px;display:grid;gap:16px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:22px}.card h3{margin-bottom:10px}.card p{font-size:15px;margin:0 0 14px;color:var(--text)}
.card.hl{background:linear-gradient(160deg,color-mix(in srgb,var(--accent) 16%,var(--panel)),var(--panel));border-color:color-mix(in srgb,var(--accent) 38%,var(--line))}.card .btn{width:100%}
.toc{list-style:none;margin:0;padding:0;display:grid;gap:2px}.toc a{display:block;padding:8px 10px;border-radius:8px;color:var(--text);text-decoration:none;font-size:14.5px;line-height:1.4}.toc a:hover{background:var(--panel2);color:#fff}
.links a{display:block;padding:9px 0;border-bottom:1px solid var(--line);font-size:14.5px;line-height:1.4}.links a:last-child{border:0}
/* footer */
.ftr{border-top:1px solid var(--line);background:#040a10;padding:44px 0 90px;color:var(--muted);font-size:14.5px}
.ftr .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}.ftr h4{font:700 12px/1 var(--font);letter-spacing:.12em;text-transform:uppercase;color:#fff;margin:0 0 14px}.ftr a{display:block;color:var(--muted);text-decoration:none;padding:5px 0}.ftr a:hover{color:var(--brand)}.ftr p{margin:0 0 10px;line-height:1.6}
.ftr .fine{margin-top:30px;padding-top:20px;border-top:1px solid var(--line);font-size:13px}
.sticky{position:fixed;left:12px;right:12px;bottom:12px;z-index:60;display:none;background:rgba(8,21,31,.94);backdrop-filter:blur(12px);border:1px solid var(--line2);border-radius:16px;padding:10px 10px 10px 16px;align-items:center;justify-content:space-between;gap:10px;box-shadow:var(--shadow)}.sticky span{font:600 13.5px/1.3 var(--font);color:var(--ink)}
@media(max-width:980px){.hero{grid-template-columns:1fr}.layout{grid-template-columns:1fr}.side{position:static;grid-template-columns:1fr 1fr}.related{grid-template-columns:1fr 1fr}.ftr .cols{grid-template-columns:1fr 1fr}.nav a:not(.btn){display:none}}
@media(max-width:640px){body{font-size:16.5px}.wrap{width:calc(100% - 32px)}.checks{grid-template-columns:1fr}.related,.side{grid-template-columns:1fr}.steps li{padding:18px 18px 18px 64px}.steps li::before{left:16px;width:34px;height:34px}.cta{padding:22px}.sticky{display:flex}.hdr .logo{flex-basis:190px}.ftr .cols{grid-template-columns:1fr}.hdr .btn{display:none}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
@media print{.hdr,.side,.sticky,.ftr,.cta-row{display:none}body{background:#fff;color:#000}}