/* LK Platform by Rootsecurity — site styles (dark brand theme + 3D) */
:root{
  --bg:#070a13; --bg-2:#0b1020; --bg-soft:#0d1325; --card:rgba(255,255,255,.035); --card-h:rgba(255,255,255,.06);
  --line:rgba(148,163,184,.14); --ink:#f8fafc; --text:#a3b1c6; --muted:#7a879c;
  --brand:#3c83f6; --brand-2:#66a1ff; --brand-d:#2563eb; --cyan:#22d3ee; --green:#22c55e; --amber:#f59e0b; --red:#ef4444;
  --grad:linear-gradient(135deg,#3c83f6 0%,#66a1ff 100%);
  --radius:18px; --shadow:0 10px 40px -12px rgba(0,0,0,.6); --shadow-lg:0 40px 100px -30px rgba(0,0,0,.85);
  --glow:0 0 0 1px rgba(102,161,255,.25),0 20px 60px -20px rgba(60,131,246,.55);
  --max:1200px;
  --font:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  --display:'Space Grotesk','Inter',system-ui,sans-serif;
  color-scheme:dark;
}
.light-zone{
  --bg:#ffffff; --bg-2:#f8fafc; --bg-soft:#f4f7fb; --card:#ffffff; --card-h:#ffffff; --line:#e2e8f0;
  --ink:#0f172a; --text:#334155; --muted:#64748b; --shadow:0 1px 2px rgba(15,23,42,.06),0 8px 24px rgba(15,23,42,.08);
  color-scheme:light; background:var(--bg); color:var(--text);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:88px;overflow-x:clip}
body{margin:0;font:16px/1.65 var(--font);color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand-2);text-decoration:none}
h1,h2,h3,h4{font-family:var(--display);color:var(--ink);line-height:1.1;margin:0 0 .5em;letter-spacing:-.02em;font-weight:700}
h1{font-size:clamp(2.4rem,5.6vw,4.4rem)}
h2{font-size:clamp(1.9rem,3.6vw,2.9rem)}
h3{font-size:1.25rem}
p{margin:0 0 1em}
.wrap{max-width:var(--max);margin:0 auto;padding-inline:24px}
section{padding-block:104px;position:relative}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font:600 .78rem/1 var(--font);letter-spacing:.14em;text-transform:uppercase;color:var(--brand-2);margin-bottom:18px}
.eyebrow::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--brand);box-shadow:0 0 12px var(--brand)}
.lead{font-size:1.15rem;color:var(--text);max-width:660px}
.center{text-align:center}.center .lead{margin-inline:auto}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.grid-bg{position:absolute;inset:0;background-image:linear-gradient(rgba(148,163,184,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(148,163,184,.05) 1px,transparent 1px);background-size:64px 64px;mask-image:radial-gradient(ellipse at 50% 30%,#000 20%,transparent 70%);-webkit-mask-image:radial-gradient(ellipse at 50% 30%,#000 20%,transparent 70%);pointer-events:none}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:10px;padding:14px 24px;border-radius:12px;font:600 .98rem/1 var(--font);border:1px solid transparent;cursor:pointer;transition:transform .2s,box-shadow .2s,background .2s;color:#fff}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--grad);box-shadow:0 12px 34px -10px rgba(60,131,246,.9)}
.btn-primary:hover{box-shadow:0 16px 44px -10px rgba(60,131,246,1)}
.btn-ghost{background:rgba(255,255,255,.04);border-color:rgba(148,163,184,.25)}
.btn-ghost:hover{background:rgba(255,255,255,.09)}
.btn svg{width:18px;height:18px}

/* Nav */
.nav{position:fixed;inset:0 0 auto;z-index:50;padding-top:env(safe-area-inset-top,0px);transition:background .3s,box-shadow .3s}
.nav .wrap{display:flex;align-items:center;gap:28px;height:76px}
.nav.solid{background:rgba(7,10,19,.97)!important}
.nav.scrolled,.nav.solid{background:rgba(7,10,19,.8);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);box-shadow:0 1px 0 var(--line)}
.brand{display:flex;align-items:center;gap:12px;color:#fff;font:700 1.22rem/1 var(--display)}
.brand img{height:36px;width:auto}
.brand small{display:block;font:600 .62rem/1 var(--font);letter-spacing:.16em;text-transform:uppercase;color:var(--brand-2);margin-top:5px}
.nav-links{display:flex;gap:30px;margin-left:auto}
.nav-links a{color:#a3b1c6;font-weight:500;font-size:.95rem;transition:color .2s}
.nav-links a:hover,.nav-links a.active{color:#fff}
.nav .btn{padding:11px 20px}
.menu-btn{display:none;margin-left:auto;background:none;border:0;color:#fff;padding:8px;cursor:pointer}
@media (max-width:900px){
  .nav-links{display:none;position:absolute;top:76px;left:0;right:0;flex-direction:column;gap:0;background:rgba(7,10,19,.97);padding:8px 24px 20px;border-bottom:1px solid var(--line)}
  .nav-links.open{display:flex}.nav-links a{padding:13px 0;border-bottom:1px solid var(--line)}
  .menu-btn{display:block}.nav .btn{display:none}
}

/* HERO with 3D globe */
.hero{padding:150px 0 40px;overflow:hidden;min-height:100vh}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(900px 520px at 50% 0%,rgba(60,131,246,.28),transparent 65%);pointer-events:none}
#globe{position:absolute;inset:0;width:100%;height:100%;opacity:.9}
.hero .wrap{position:relative;z-index:2}
.hero h1{max-width:960px;margin-inline:auto}
.hero .lead{margin:0 auto 34px;font-size:1.2rem}
.pill{display:inline-flex;align-items:center;gap:10px;padding:6px 16px 6px 6px;border-radius:999px;background:rgba(60,131,246,.08);border:1px solid rgba(102,161,255,.25);font-size:.88rem;color:#c7d6f2;margin-bottom:28px;backdrop-filter:blur(6px)}
.pill img{height:22px;width:auto;padding:3px 7px;border-radius:999px;background:rgba(255,255,255,.06)}
.pill b{background:var(--grad);color:#fff;padding:3px 10px;border-radius:999px;font-size:.74rem}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero-os{display:flex;gap:26px;justify-content:center;flex-wrap:wrap;margin-top:28px;font-size:.9rem;color:var(--muted)}
.hero-os span{display:inline-flex;align-items:center;gap:8px}
.hero-os svg{width:18px;height:18px;color:var(--brand-2)}

/* 3D screen stack */
.stage{position:relative;margin:70px auto 0;max-width:1120px;height:clamp(300px,52vw,640px);perspective:2400px;perspective-origin:50% 20%}
.stack{position:absolute;inset:0;transform-style:preserve-3d;transform:rotateX(20deg) rotateY(var(--ry,-10deg)) rotateZ(2deg);transition:transform .25s ease-out}
.stack .scr{position:absolute;border-radius:14px;overflow:hidden;background:#0b1020;box-shadow:var(--shadow-lg),0 0 0 1px rgba(148,163,184,.18);transform-style:preserve-3d}
.stack .scr img{width:100%}
.scr.main{left:12%;right:12%;top:0;transform:translateZ(60px);box-shadow:var(--shadow-lg),var(--glow)}
.scr.left{left:0;width:42%;top:16%;transform:translateZ(-80px) translateX(-6%) rotateY(14deg);opacity:.85}
.scr.right{right:0;width:42%;top:22%;transform:translateZ(-60px) translateX(6%) rotateY(-14deg);opacity:.85}
.scr .bar{display:flex;gap:6px;align-items:center;height:26px;padding:0 12px;background:#0f172a}
.scr .bar i{width:9px;height:9px;border-radius:50%;background:#334155}
.scr .bar i:nth-child(1){background:#ef4444}.scr .bar i:nth-child(2){background:#f59e0b}.scr .bar i:nth-child(3){background:#22c55e}
.stage-floor{position:absolute;left:10%;right:10%;bottom:-30px;height:80px;background:radial-gradient(closest-side,rgba(60,131,246,.45),transparent);filter:blur(30px)}
.chip{position:absolute;z-index:3;display:flex;gap:12px;align-items:center;padding:12px 16px;border-radius:14px;background:rgba(11,16,32,.85);border:1px solid rgba(102,161,255,.25);backdrop-filter:blur(10px);color:#dbe5f5;font-size:.84rem;box-shadow:var(--shadow);animation:bob 6s ease-in-out infinite}
.chip b{display:block;color:#fff;font-size:.93rem}
.chip .dot{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;flex:none}
.chip-1{left:2%;top:4%}.chip-2{right:1%;top:48%;animation-delay:-3s}.chip-3{left:6%;bottom:6%;animation-delay:-1.5s}
@keyframes bob{50%{transform:translateY(-12px)}}
@media (max-width:760px){.chip{display:none}.stage{perspective:1400px}.scr.left,.scr.right{display:none}.scr.main{left:0;right:0}}

/* Trust strip */
.trust{padding:56px 0;border-block:1px solid var(--line);background:linear-gradient(180deg,rgba(60,131,246,.05),transparent)}
.trust-inner{display:grid;grid-template-columns:auto 1fr;gap:56px;align-items:center}
.trust-brand{display:flex;flex-direction:column;gap:10px;padding-right:56px;border-right:1px solid var(--line)}
.trust-brand img{height:52px;width:auto}
.trust-brand span{font-size:.82rem;color:var(--muted);letter-spacing:.04em}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stats b{display:block;font:700 2.5rem/1 var(--display);color:#fff;margin-bottom:8px}
.stats span{font-size:.9rem}
@media (max-width:900px){.trust-inner{grid-template-columns:1fr;gap:32px}.trust-brand{border:0;padding:0;align-items:center;text-align:center}.stats{grid-template-columns:repeat(2,1fr)}}

/* 3D icon tiles */
.ico{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;flex:none;color:#fff;background:linear-gradient(145deg,#4b8ef8,#1d4ed8);box-shadow:inset 0 1px 0 rgba(255,255,255,.35),inset 0 -3px 0 rgba(0,0,0,.25),0 8px 20px -6px rgba(60,131,246,.8);transform:translateZ(30px)}
.ico svg{width:21px;height:21px;filter:drop-shadow(0 1px 1px rgba(0,0,0,.3))}
.light-zone .ico{box-shadow:inset 0 1px 0 rgba(255,255,255,.35),inset 0 -3px 0 rgba(0,0,0,.2),0 6px 14px -6px rgba(37,99,235,.7)}

/* Tilt cards */
[data-tilt]{transform-style:preserve-3d;transition:transform .2s ease-out,box-shadow .3s,border-color .3s;will-change:transform;position:relative}
[data-tilt] .glare{position:absolute;inset:0;border-radius:inherit;pointer-events:none;background:radial-gradient(circle at var(--gx,50%) var(--gy,50%),rgba(255,255,255,.14),transparent 45%);opacity:0;transition:opacity .3s}
[data-tilt]:hover .glare{opacity:1}

.replace-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(178px,1fr));gap:16px;margin-top:52px;perspective:1000px}
.replace-grid>div{border:1px solid var(--line);border-radius:16px;padding:20px;background:var(--card);font-weight:600;color:var(--ink);display:flex;gap:14px;align-items:center;text-align:left}
.replace-grid>div:hover{border-color:rgba(102,161,255,.45);box-shadow:var(--glow)}
.replace-grid .ico{width:40px;height:40px}.replace-grid .ico svg{width:19px;height:19px}

/* 3D ring carousel */
.ring-sec{background:radial-gradient(900px 500px at 50% 40%,rgba(60,131,246,.16),transparent 70%);overflow:hidden;overflow:clip}
.ring-stage{position:relative;height:clamp(300px,44vw,540px);perspective:1800px;margin-top:40px;cursor:grab;touch-action:pan-y;user-select:none}
.ring-stage:active{cursor:grabbing}
.ring{position:absolute;left:50%;top:50%;width:var(--w,560px);height:calc(var(--w,560px)*.625);margin:calc(var(--w,560px)*-.3125) 0 0 calc(var(--w,560px)/-2);transform-style:preserve-3d}
.ring .item{position:absolute;inset:0;border-radius:14px;overflow:hidden;background:#0b1020;box-shadow:0 0 0 1px rgba(148,163,184,.2),0 30px 60px -20px rgba(0,0,0,.8);backface-visibility:hidden;transition:filter .4s,box-shadow .4s}
.ring .item img{width:100%;height:100%;object-fit:cover;object-position:left top;pointer-events:none}
.ring .item.front{box-shadow:var(--glow),0 30px 60px -20px rgba(0,0,0,.8)}
.ring .item:not(.front){filter:brightness(.45) saturate(.7)}
.ring-caption{text-align:center;margin-top:44px;min-height:120px}
.ring-caption h3{font-size:1.6rem;display:inline-flex;gap:12px;align-items:center}
.ring-caption p{max-width:620px;margin:0 auto;color:var(--text)}
.ring-nav{display:flex;gap:12px;justify-content:center;margin-top:22px}
.ring-nav button{width:46px;height:46px;border-radius:50%;border:1px solid var(--line);background:var(--card);color:#fff;cursor:pointer;display:grid;place-items:center;transition:all .2s}
.ring-nav button:hover{border-color:var(--brand);background:rgba(60,131,246,.15)}
.ring-nav svg{width:20px;height:20px}
.ring-dots{display:flex;gap:8px;justify-content:center;margin-top:18px}
.ring-dots i{width:8px;height:8px;border-radius:99px;background:rgba(148,163,184,.3);transition:all .3s}
.ring-dots i.on{width:26px;background:var(--brand)}

/* Browser frame */
.frame{border-radius:14px;background:#0b1020;box-shadow:var(--shadow-lg),0 0 0 1px rgba(148,163,184,.16);overflow:hidden}
.frame-bar{display:flex;align-items:center;gap:7px;height:34px;padding:0 14px;background:#0f172a}
.frame-bar i{width:11px;height:11px;border-radius:50%;background:#374151}
.frame-bar i:nth-child(1){background:#ef4444}.frame-bar i:nth-child(2){background:#f59e0b}.frame-bar i:nth-child(3){background:#22c55e}
.frame-bar span{margin-left:14px;flex:1;max-width:340px;height:20px;border-radius:6px;background:#1e293b;color:#7a879c;font-size:.72rem;line-height:20px;padding-left:10px;overflow:hidden;white-space:nowrap}
.light-zone .frame{background:#fff;box-shadow:0 20px 50px -20px rgba(15,23,42,.35),0 0 0 1px #e2e8f0}
.light-zone .frame-bar{background:#f1f5f9}.light-zone .frame-bar span{background:#fff;color:#94a3b8}
.frame img{width:100%;cursor:zoom-in}

/* Feature rows w/ 3D reveal */
.feature{display:grid;grid-template-columns:1fr 1.25fr;gap:72px;align-items:center;margin-bottom:140px}
.feature:last-child{margin-bottom:0}
.feature.rev{grid-template-columns:1.25fr 1fr}.feature.rev .feature-text{order:2}
.feature-text ul{list-style:none;padding:0;margin:26px 0 0;display:grid;gap:16px}
.feature-text li{display:flex;gap:14px}
.feature-text li .ico{width:36px;height:36px;border-radius:10px}.feature-text li .ico svg{width:17px;height:17px}
.feature-text li b{color:var(--ink);display:block}
.feature-text li span{font-size:.94rem;color:var(--muted)}
.persp{perspective:1600px}
.r3d{transform:rotateY(-22deg) rotateX(8deg) translateZ(-40px);opacity:0;transition:transform 1.2s cubic-bezier(.2,.7,.2,1),opacity 1s}
.feature.rev .r3d{transform:rotateY(22deg) rotateX(8deg) translateZ(-40px)}
.r3d.in{opacity:1;transform:rotateY(-6deg) rotateX(2deg)}
.feature.rev .r3d.in{transform:rotateY(6deg) rotateX(2deg)}
.r3d.in:hover,.feature.rev .r3d.in:hover{transform:none}
.shot-stack{position:relative}
.shot-stack .mini{position:absolute;width:40%;right:-6%;bottom:-14%;border-radius:12px;box-shadow:var(--shadow-lg),0 0 0 1px rgba(148,163,184,.2);transform:translateZ(80px)}
@media (max-width:900px){.feature,.feature.rev{grid-template-columns:1fr;gap:40px;margin-bottom:90px}.feature.rev .feature-text{order:0}.shot-stack .mini{display:none}}

/* Compare slider */
.compare{position:relative;margin-top:52px;border-radius:14px;overflow:hidden;box-shadow:var(--shadow-lg),var(--glow);user-select:none;aspect-ratio:16/10;touch-action:pan-y}
.compare img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:top}
.compare .top{clip-path:inset(0 50% 0 0)}
.compare .handle{position:absolute;top:0;bottom:0;left:50%;width:3px;background:#fff;transform:translateX(-50%);cursor:ew-resize}
.compare .handle::after{content:"⇆";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:46px;height:46px;border-radius:50%;background:#fff;color:#0f172a;display:grid;place-items:center;font-size:20px;box-shadow:0 4px 20px rgba(0,0,0,.4)}
.compare .lbl{position:absolute;top:14px;padding:4px 12px;border-radius:999px;background:rgba(0,0,0,.6);color:#fff;font-size:.8rem;font-weight:600}
.compare .lbl.l{left:14px}.compare .lbl.r{right:14px}

/* Cards */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px;margin-top:52px;perspective:1200px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:30px}
.card:hover{border-color:rgba(102,161,255,.4);box-shadow:var(--glow)}
.card .ico{margin-bottom:20px}
.card p{font-size:.95rem;color:var(--muted);margin:0}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:56px;counter-reset:s;perspective:1200px}
.step{position:relative;padding:34px 28px;border-radius:var(--radius);background:var(--card);border:1px solid var(--line)}
.step::before{counter-increment:s;content:counter(s,decimal-leading-zero);font:700 3.4rem/1 var(--display);position:absolute;right:22px;top:16px;background:linear-gradient(180deg,rgba(102,161,255,.35),transparent);-webkit-background-clip:text;background-clip:text;color:transparent}
.step code{display:block;margin-top:14px;background:#030712;color:#7dd3fc;padding:12px 14px;border-radius:10px;font-size:.78rem;overflow-x:auto;white-space:nowrap;border:1px solid var(--line)}
@media (max-width:860px){.steps{grid-template-columns:1fr}}

/* About Rootsecurity */
.about{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.about-logo{position:relative;aspect-ratio:1;width:100%;max-width:440px;margin:0 auto;display:grid;place-items:center;perspective:900px}
.about-logo .orb{position:absolute;inset:8%;border-radius:50%;border:1px solid rgba(102,161,255,.25);animation:spin 18s linear infinite}
.about-logo .orb:nth-child(2){inset:20%;animation-duration:12s;animation-direction:reverse;border-style:dashed}
.about-logo .orb::after{content:"";position:absolute;top:-5px;left:50%;width:10px;height:10px;border-radius:50%;background:var(--brand-2);box-shadow:0 0 16px var(--brand)}
.about-logo img{width:46%;filter:drop-shadow(0 20px 40px rgba(60,131,246,.55));animation:float3d 7s ease-in-out infinite}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes float3d{0%,100%{transform:rotateY(-18deg) rotateX(8deg) translateY(0)}50%{transform:rotateY(18deg) rotateX(-4deg) translateY(-14px)}}
.svc{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 28px}
.svc span{padding:8px 14px;border-radius:999px;border:1px solid rgba(102,161,255,.3);background:rgba(60,131,246,.08);color:#cfe0ff;font-size:.86rem;font-weight:500}
@media (max-width:900px){.about{grid-template-columns:1fr;gap:40px}}

/* Phones 3D */
.phones{display:flex;gap:30px;justify-content:center;align-items:center;flex-wrap:wrap;margin-top:56px;perspective:1600px}
.phone{width:230px;border-radius:38px;padding:10px;background:linear-gradient(145deg,#1e293b,#0b1020);box-shadow:var(--shadow-lg),0 0 0 1px rgba(148,163,184,.2),inset 0 0 0 2px rgba(255,255,255,.04);transition:transform .6s}
.phone img{border-radius:29px;aspect-ratio:390/844;object-fit:cover;object-position:top;cursor:zoom-in}
.phone:nth-child(1){transform:rotateY(28deg) translateZ(-40px)}
.phone:nth-child(2){transform:translateY(-24px) translateZ(40px)}
.phone:nth-child(3){transform:rotateY(-28deg) translateZ(-40px)}
.phone:hover{transform:none}

/* CTA */
.cta{background:radial-gradient(600px 300px at 20% 0%,rgba(102,161,255,.35),transparent 60%),linear-gradient(120deg,#1e40af,#2563eb 50%,#0e7490);color:#dbeafe;border-radius:28px;padding:68px 48px;text-align:center;position:relative;overflow:hidden;box-shadow:var(--glow)}
.cta::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.14) 1px,transparent 1px);background-size:22px 22px;mask-image:linear-gradient(transparent,#000);-webkit-mask-image:linear-gradient(transparent,#000)}
.cta>*{position:relative;z-index:1}
.cta h2{color:#fff}.cta .btn-primary{background:#fff;color:#1d4ed8;box-shadow:none}
.cta .lead{color:#c7dcff;margin:0 auto 28px}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:56px;align-items:start}
.c-list{list-style:none;padding:0;margin:32px 0 0;display:grid;gap:18px}
.c-list li{display:flex;gap:16px;align-items:center}
.c-list b{color:var(--ink);display:block;font-size:.9rem}
.c-list a,.c-list span{color:var(--text)}
.socials{display:flex;gap:10px;margin-top:28px}
.socials a{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;border:1px solid var(--line);background:var(--card);color:#cbd5e1;transition:all .2s}
.socials a:hover{border-color:var(--brand);color:#fff;transform:translateY(-3px)}
.socials svg{width:18px;height:18px}
.form{background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.02));border:1px solid var(--line);border-radius:22px;padding:34px;box-shadow:var(--shadow)}
.form label{display:block;font-weight:600;font-size:.86rem;color:var(--ink);margin-bottom:7px}
.form input,.form textarea,.form select{width:100%;padding:13px 14px;border:1px solid rgba(148,163,184,.22);border-radius:11px;font:inherit;margin-bottom:16px;background:rgba(3,7,18,.6);color:var(--ink)}
.form input:focus,.form textarea:focus,.form select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(60,131,246,.25)}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form .hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.form-msg{display:none;padding:14px;border-radius:11px;font-weight:600;margin-top:14px}
.form-msg.ok{display:block;background:rgba(34,197,94,.12);color:#86efac;border:1px solid rgba(34,197,94,.3)}
.form-msg.err{display:block;background:rgba(239,68,68,.12);color:#fca5a5;border:1px solid rgba(239,68,68,.3)}
@media (max-width:900px){.contact-grid,.form .row{grid-template-columns:1fr}}

/* WhatsApp float */
.wa{position:fixed;right:22px;bottom:calc(22px + env(safe-area-inset-bottom,0px));z-index:60;width:58px;height:58px;border-radius:50%;background:#25d366;display:grid;place-items:center;box-shadow:0 10px 30px -6px rgba(37,211,102,.7);transition:transform .2s}
.wa:hover{transform:scale(1.08)}
.wa svg{width:30px;height:30px;color:#fff}

/* Footer */
footer{background:#04060d;color:var(--muted);padding:72px 0 32px;font-size:.92rem;border-top:1px solid var(--line)}
.foot{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:44px}
.foot h4{color:#e2e8f0;font-size:.92rem;margin-bottom:16px}
.foot a{color:var(--text);display:block;margin-bottom:9px}.foot a:hover{color:#fff}
.foot .rs-logo{height:46px;width:auto;margin:18px 0 12px}
.foot-bottom{border-top:1px solid var(--line);margin-top:52px;padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
@media (max-width:860px){.foot{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.foot{grid-template-columns:1fr}}

/* Sub page header */
.page-head{padding:160px 0 90px;overflow:hidden}
.page-head::before{content:"";position:absolute;inset:0;background:radial-gradient(800px 400px at 30% 0%,rgba(60,131,246,.35),transparent 60%),radial-gradient(500px 300px at 90% 30%,rgba(34,211,238,.12),transparent 60%)}
.page-head .wrap{position:relative;z-index:2}
.page-head h1{font-size:clamp(2.3rem,4.6vw,3.6rem)}

/* Module grid */
.mods{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:24px;perspective:1400px}
.mod{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.mod:hover{border-color:rgba(102,161,255,.4);box-shadow:var(--glow)}
.mod-img{aspect-ratio:16/9.5;overflow:hidden;background:#0b1020;border-bottom:1px solid var(--line)}
.mod-img img{width:100%;height:100%;object-fit:cover;object-position:left top;transition:transform .6s;cursor:zoom-in}
.mod:hover .mod-img img{transform:scale(1.05)}
.mod-body{padding:22px 24px 26px}
.mod-body h3{display:flex;gap:12px;align-items:center}
.mod-body h3 .ico{width:34px;height:34px;border-radius:10px}.mod-body h3 .ico svg{width:17px;height:17px}
.mod-body p{font-size:.94rem;color:var(--muted);margin:0}
.cat-title{margin:80px 0 26px;display:flex;align-items:center;gap:16px;font-size:1.6rem}
.cat-title:first-child{margin-top:0}
.cat-title::after{content:"";flex:1;height:1px;background:linear-gradient(90deg,var(--line),transparent)}

/* Guide (inside .light-zone) */
.guide{display:grid;grid-template-columns:260px minmax(0,1fr);gap:56px;align-items:start}
.guide>div{min-width:0}
.g-sec code{overflow-wrap:anywhere}
.toc{position:sticky;top:100px;max-height:calc(100vh - 124px);overflow:auto;padding-right:8px;font-size:.92rem}
.toc h4{font-size:.74rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:22px 0 8px;font-family:var(--font)}
.toc h4:first-child{margin-top:0}
.toc a{display:block;padding:7px 12px;border-radius:8px;color:var(--text);border-left:2px solid transparent}
.toc a:hover{background:var(--bg-soft)}
.toc a.active{background:#eaf2ff;color:var(--brand-d);font-weight:600;border-left-color:var(--brand)}
.toc-mobile{display:none;margin-bottom:28px}
.toc-mobile select{width:100%;padding:12px;border-radius:10px;border:1px solid var(--line);font:inherit;background:#fff;color:var(--ink)}
.g-sec{padding:0 0 72px;margin-bottom:72px;border-bottom:1px solid var(--line)}
.g-sec:last-of-type{border-bottom:0}
.g-sec h2{font-size:1.9rem;display:flex;align-items:center;gap:14px}
.g-sec h3{margin-top:36px}
.g-sec a{color:var(--brand-d)}
.g-steps{counter-reset:g;list-style:none;padding:0;margin:20px 0}
.g-steps li{counter-increment:g;position:relative;padding:0 0 18px 48px}
.g-steps li::before{content:counter(g);position:absolute;left:0;top:0;width:30px;height:30px;border-radius:50%;background:var(--grad);color:#fff;font-weight:700;font-size:.85rem;display:grid;place-items:center;box-shadow:0 4px 10px -3px rgba(37,99,235,.6)}
.g-steps li:not(:last-child)::after{content:"";position:absolute;left:14px;top:34px;bottom:2px;width:2px;background:#dbeafe}
.g-steps b{color:var(--ink)}
.note{border-left:4px solid var(--brand);background:#f0f6ff;padding:14px 18px;border-radius:0 12px 12px 0;margin:20px 0;font-size:.95rem}
.note.warn{border-color:var(--amber);background:#fffbeb}
.note.tip{border-color:var(--green);background:#f0fdf4}
.note b{color:var(--ink)}
kbd{font:600 .8rem var(--font);padding:2px 7px;border-radius:6px;border:1px solid var(--line);border-bottom-width:2px;background:#fff;color:var(--ink)}
pre.code{background:#0b1020;color:#e2e8f0;padding:16px 18px;border-radius:12px;overflow-x:auto;font-size:.85rem;line-height:1.6;margin:16px 0}
pre.code .c{color:#64748b}
.ann{position:relative;margin:24px 0}
.mark{position:absolute;width:30px;height:30px;margin:-15px 0 0 -15px;border-radius:50%;background:var(--red);color:#fff;font:700 .85rem/30px var(--font);text-align:center;z-index:2;animation:pulse 2.4s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 4px rgba(239,68,68,.25),0 4px 12px rgba(0,0,0,.3)}50%{box-shadow:0 0 0 10px rgba(239,68,68,.1),0 4px 12px rgba(0,0,0,.3)}}
.legend{list-style:none;padding:0;margin:16px 0;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:10px 24px;font-size:.94rem}
.legend li{display:flex;gap:10px}
.legend li span{flex:none;width:24px;height:24px;border-radius:50%;background:var(--red);color:#fff;font:700 .75rem/24px var(--font);text-align:center}
.table-wrap{overflow-x:auto;margin:16px 0}
.g-table{width:100%;border-collapse:collapse;font-size:.92rem;min-width:480px}
.g-table th,.g-table td{text-align:left;padding:10px 14px;border-bottom:1px solid var(--line)}
.g-table th{background:var(--bg-soft);color:var(--ink);font-weight:600}
@media (max-width:960px){.guide{grid-template-columns:1fr}.toc{display:none}.toc-mobile{display:block;position:sticky;top:84px;z-index:5}}
@media (max-width:600px){.mark{width:22px;height:22px;margin:-11px 0 0 -11px;font-size:.7rem;line-height:22px}}

/* Lightbox */
.lb{position:fixed;inset:0;z-index:100;background:rgba(2,6,23,.94);display:flex;align-items:center;justify-content:center;padding:24px;opacity:0;pointer-events:none;transition:opacity .25s;cursor:zoom-out}
.lb.open{opacity:1;pointer-events:auto}
.lb img{max-width:96vw;max-height:90vh;border-radius:10px;box-shadow:var(--shadow-lg);transform:scale(.96);transition:transform .25s}
.lb.open img{transform:none}
.lb p{position:absolute;bottom:18px;left:0;right:0;text-align:center;color:#cbd5e1;font-size:.9rem;margin:0}

/* Reveal */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .9s ease,transform .9s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal,.r3d{opacity:1!important;transform:none!important}
  .chip,.mark,.about-logo img,.about-logo .orb{animation:none}
}