/* ARKA Cyber AI — arkacyberai.info */
:root{
  --navy:#13254a; --navy-2:#0d1a36; --navy-3:#1b3260;
  --teal:#0f7f86; --teal-2:#24808c; --teal-soft:#e7f3f4; --teal-ink:#7fd3d8;
  --ink:#13254a; --text:#3b4658; --muted:#6b7585; --line:#e3e7ed; --bg:#ffffff; --bg-2:#f4f7f9;
  --red:#c0392b; --amber:#b7791f;
  --radius:12px; --shadow:0 10px 30px -12px rgba(19,37,74,.18);
  --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Inter",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--text);background:var(--bg);line-height:1.6;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--teal);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{color:var(--ink);line-height:1.2;margin:0 0 .5em;letter-spacing:-.01em}
h1{font-size:clamp(2rem,4.6vw,3.3rem);font-weight:800}
h2{font-size:clamp(1.6rem,3vw,2.3rem);font-weight:800}
h3{font-size:1.15rem;font-weight:700}
p{margin:0 0 1em}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
.eyebrow{display:inline-block;font-size:.75rem;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--teal);margin-bottom:12px}
.lead{font-size:1.15rem;color:var(--muted);max-width:720px}
section{padding:88px 0}
.section-alt{background:var(--bg-2)}
.center{text-align:center}.center .lead{margin-left:auto;margin-right:auto}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:12px}
.brand img{height:40px;width:auto}
.brand span{font-size:.72rem;font-weight:700;letter-spacing:.14em;color:var(--muted);text-transform:uppercase;border-left:1px solid var(--line);padding-left:12px;line-height:1.2}
.nav ul{list-style:none;display:flex;gap:28px;margin:0;padding:0;align-items:center}
.nav ul a{color:var(--text);font-weight:500;font-size:.95rem;white-space:nowrap}
.nav ul a:hover,.nav ul a.active{color:var(--teal);text-decoration:none}
.nav-toggle{display:none;background:none;border:0;padding:8px;cursor:pointer;color:var(--ink)}
@media (max-width:1080px){
  .nav-toggle{display:block}
  .nav ul{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;flex-direction:column;gap:0;border-bottom:1px solid var(--line);padding:8px 0}
  .nav ul.open{display:flex}
  .nav ul li{width:100%}
  .nav ul a{display:block;padding:12px 24px}
  .nav ul .btn{margin:8px 24px}
  .brand span{display:none}
}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 24px;border-radius:8px;font-weight:600;font-size:.95rem;border:1.5px solid transparent;cursor:pointer;transition:.15s ease;font-family:inherit}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--teal);color:#fff}
.btn-primary:hover{background:#0c6d73}
.btn-outline{border-color:rgba(255,255,255,.7);color:#fff}
.btn-outline:hover{background:rgba(255,255,255,.08)}
.btn-ghost{border-color:var(--line);color:var(--ink);background:#fff}
.btn-ghost:hover{border-color:var(--teal);color:var(--teal)}
.btn-sm{padding:9px 16px;font-size:.88rem}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}

/* hero */
.hero{background:radial-gradient(1200px 600px at 85% 20%,rgba(36,128,140,.35),transparent 60%),linear-gradient(135deg,var(--navy-2),var(--navy) 55%,#17466a);color:#d5deea;padding:110px 0 100px;position:relative;overflow:hidden}
.hero h1{color:#fff;max-width:820px}
.hero .eyebrow{color:var(--teal-ink)}
.hero .lead{color:#c3cfde}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.hero-art{position:relative}
@media (max-width:960px){.hero-grid{grid-template-columns:1fr}.hero{padding:80px 0}}
.hero-stats{display:flex;flex-wrap:wrap;gap:36px;margin-top:48px;padding-top:28px;border-top:1px solid rgba(255,255,255,.12)}
.hero-stats div strong{display:block;font-size:1.6rem;color:#fff;font-weight:800}
.hero-stats div span{font-size:.85rem;color:#9fb0c6}
.page-hero{background:linear-gradient(135deg,var(--navy-2),var(--navy) 60%,#17466a);color:#c3cfde;padding:72px 0 64px}
.page-hero h1{color:#fff;font-size:clamp(1.9rem,4vw,2.8rem)}
.page-hero .eyebrow{color:var(--teal-ink)}
.page-hero .lead{color:#c3cfde}
.crumbs{font-size:.85rem;margin-bottom:18px;color:#9fb0c6}
.crumbs a{color:#9fb0c6}

/* cards / grids */
.grid{display:grid;gap:24px}
.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
@media (max-width:960px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.g2,.g3,.g4{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:.2s ease;position:relative}
.card:hover{box-shadow:var(--shadow);border-color:#cfdbe2}
.card p{color:var(--muted);font-size:.95rem}
.icon{width:46px;height:46px;border-radius:10px;background:var(--teal-soft);color:var(--teal);display:grid;place-items:center;margin-bottom:18px}
.icon svg{width:24px;height:24px}
.num{font-size:2rem;font-weight:800;color:var(--teal);margin-bottom:8px}

/* product cards */
.pcard{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.2s ease;color:inherit}
.pcard:hover{box-shadow:var(--shadow);transform:translateY(-3px);text-decoration:none;border-color:#bfd6dc}
.pcard .art{background:linear-gradient(160deg,#eef4f7,#e2edf1);padding:22px 22px 18px;aspect-ratio:16/9;display:grid;place-items:center}
.pcard .art svg{width:100%;height:100%}
.pcard .body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1}
.pcard .model{font-size:.75rem;font-weight:700;color:var(--teal);letter-spacing:.08em;text-transform:uppercase}
.pcard h3{margin:6px 0 8px}
.pcard p{color:var(--muted);font-size:.92rem;flex:1}
.pcard .more{font-weight:600;font-size:.9rem;color:var(--teal);margin-top:6px}
.badge{display:inline-block;font-size:.7rem;font-weight:700;padding:4px 10px;border-radius:999px;letter-spacing:.04em;text-transform:uppercase}
.b-flag{background:var(--navy);color:#fff}
.b-new{background:var(--teal-soft);color:var(--teal)}
.b-sw{background:#eef0fb;color:#3c4a9a}
.pcard .badges{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{font-size:.78rem;background:var(--bg-2);border:1px solid var(--line);padding:4px 10px;border-radius:999px;color:var(--text)}

/* filter */
.filters{display:flex;flex-wrap:wrap;gap:10px;margin:0 0 36px}
.filters button{font-family:inherit;border:1px solid var(--line);background:#fff;padding:9px 16px;border-radius:999px;font-weight:600;font-size:.88rem;color:var(--text);cursor:pointer}
.filters button.on{background:var(--navy);border-color:var(--navy);color:#fff}
.cat-block{margin-bottom:56px}
.cat-block>p{color:var(--muted);max-width:760px}

/* featured / diode */
.feature{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
@media (max-width:960px){.feature{grid-template-columns:1fr}}
.checks{list-style:none;padding:0;margin:20px 0}
.checks li{padding:12px 0 12px 32px;border-bottom:1px solid var(--line);position:relative}
.checks li:before{content:"";position:absolute;left:0;top:16px;width:18px;height:18px;border-radius:50%;background:var(--teal-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230f7f86' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12l5 5L20 7'/%3E%3C/svg%3E") center/12px no-repeat}
.flow{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;gap:10px;align-items:center;text-align:center;margin:18px 0 10px}
.flow .node{background:var(--teal-soft);border-radius:10px;padding:16px 10px;font-size:.85rem;color:var(--text)}
.flow .node b{display:block;color:var(--ink);font-size:.92rem}
.flow .node.dark{background:var(--navy);color:#c3cfde}.flow .node.dark b{color:#fff}
.flow .arr{color:var(--teal);font-size:1.4rem;font-weight:700}
.flow .arr.anim{animation:pulse 1.6s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:.35;transform:translateX(-3px)}50%{opacity:1;transform:translateX(3px)}}
@media (max-width:560px){.flow{grid-template-columns:1fr}.flow .arr{transform:rotate(90deg)}}
.noreturn{color:var(--red);font-weight:700;font-size:.9rem;text-align:center}

/* tables */
table{width:100%;border-collapse:collapse;font-size:.95rem}
th,td{text-align:left;padding:13px 16px;border-bottom:1px solid var(--line);vertical-align:top}
.spec th{width:38%;color:var(--ink);font-weight:600;background:#fafbfc}
.cmp thead th{background:var(--navy);color:#fff;font-weight:600}
.cmp thead th.hl{background:var(--teal)}
.cmp td:first-child{font-weight:600;color:var(--ink)}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
.table-wrap table tr:last-child th,.table-wrap table tr:last-child td{border-bottom:0}

/* product page */
.ph-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.ph-grid .art{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:16px;padding:28px;aspect-ratio:16/10;display:grid;place-items:center}
.ph-grid .art svg{width:100%;height:100%}
@media (max-width:960px){.ph-grid{grid-template-columns:1fr}}
.two{display:grid;grid-template-columns:1.4fr 1fr;gap:48px;align-items:start}
@media (max-width:960px){.two{grid-template-columns:1fr}}
.side{position:sticky;top:96px}
.side .card{margin-bottom:20px}
.note{font-size:.82rem;color:var(--muted);background:var(--bg-2);border-left:3px solid var(--teal);padding:12px 14px;border-radius:0 8px 8px 0;margin-top:16px}
.feat-list{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:24px 0}
@media (max-width:640px){.feat-list{grid-template-columns:1fr}}
.feat-list div{border:1px solid var(--line);border-radius:10px;padding:18px}
.feat-list b{display:block;color:var(--ink);margin-bottom:4px}
.feat-list span{color:var(--muted);font-size:.92rem}
.block{margin-bottom:48px}

/* compliance */
.reg{border-left:4px solid var(--teal)}
.reg .tag{font-size:.75rem;font-weight:700;color:var(--teal);text-transform:uppercase;letter-spacing:.08em}

/* CTA band */
.cta{background:linear-gradient(135deg,var(--navy),#17466a);color:#c3cfde;border-radius:16px;padding:48px;display:flex;justify-content:space-between;align-items:center;gap:32px;flex-wrap:wrap}
.cta h2{color:#fff;margin-bottom:6px}
.cta p{margin:0}

/* forms */
form .row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:640px){form .row{grid-template-columns:1fr}}
label{display:block;font-size:.85rem;font-weight:600;color:var(--ink);margin-bottom:6px}
input,select,textarea{width:100%;font:inherit;padding:12px 14px;border:1px solid #cfd6df;border-radius:8px;background:#fff;color:var(--ink);margin-bottom:16px}
input:focus,select:focus,textarea:focus{outline:2px solid var(--teal);outline-offset:0;border-color:var(--teal)}
textarea{min-height:130px;resize:vertical}
.hidden{display:none}

/* footer */
.site-footer{background:var(--navy-2);color:#9fb0c6;padding:64px 0 28px;font-size:.92rem}
.site-footer a{color:#c3cfde}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
@media (max-width:860px){.foot-grid{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.foot-grid{grid-template-columns:1fr}}
.foot-logo{background:#fff;border-radius:10px;padding:10px 14px;display:inline-block;margin-bottom:16px}
.foot-logo img{height:38px}
.site-footer h4{color:#fff;font-size:.85rem;letter-spacing:.1em;text-transform:uppercase;margin-bottom:14px}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:8px}
.legal{border-top:1px solid rgba(255,255,255,.1);margin-top:44px;padding-top:22px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:.82rem}

.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}.flow .arr.anim{animation:none}html{scroll-behavior:auto}}