:root{
  --sc-blue:#0078D4; --sc-blue-d:#005ea2; --sc-blue-t:#eff6ff;
  --ink:#0f172a; --ink-2:#1e293b; --muted:#64748b; --muted-2:#94a3b8;
  --bg:#f8fafc; --surface:#ffffff; --sunken:#f1f5f9; --line:#e2e8f0; --line-2:#eef2f7;
  --ok:#16a34a; --ok-t:#f0fdf4; --warn:#d97706;
  --r-s:8px; --r-m:12px; --r-l:18px; --pill:9999px;
  --sh-s:0 1px 2px rgba(15,23,42,.06),0 1px 3px rgba(15,23,42,.08);
  --sh-m:0 4px 12px rgba(15,23,42,.08);
  --sh-blue:0 6px 18px rgba(0,120,212,.28);
  --fs:15.5px; --max:1080px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{font-family:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;font-size:var(--fs);line-height:1.6;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}
a{color:var(--sc-blue);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:var(--max);margin:0 auto;padding:0 20px}

/* topbar */
.topbar{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.85);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.topbar .row{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand-logo{font-weight:800;font-size:18px;color:var(--ink);letter-spacing:-.02em;display:flex;align-items:center;gap:9px}
.brand-logo .mk{width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,#0078D4,#005ea2);display:inline-grid;place-items:center;color:#fff;font-size:16px}
.brand-logo .hl{color:var(--sc-blue)}
.topbar nav a{color:var(--muted);font-weight:600;font-size:14px;margin-left:22px}
.topbar nav a:hover{color:var(--ink);text-decoration:none}

/* hero */
.hero{background:radial-gradient(120% 120% at 50% -10%,#0b1220 0%,#101a33 45%,#16264a 100%);color:#fff;padding:56px 0 64px;text-align:center}
.hero h1{font-size:clamp(28px,4.4vw,42px);font-weight:800;letter-spacing:-.025em;margin-bottom:12px}
.hero p.lead{font-size:clamp(15px,2vw,18px);color:#c7d2e3;max-width:620px;margin:0 auto 8px}
.sla{display:inline-flex;align-items:center;gap:9px;margin:18px auto 0;padding:9px 18px;border-radius:var(--pill);background:rgba(34,197,94,.14);border:1px solid rgba(34,197,94,.35);color:#bbf7d0;font-weight:700;font-size:15px}
.sla .dot{width:9px;height:9px;border-radius:50%;background:#22c55e;box-shadow:0 0 0 4px rgba(34,197,94,.22);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.55}}

/* search */
.searchwrap{max-width:640px;margin:26px auto 0;position:relative}
.searchwrap input{width:100%;padding:16px 20px 16px 52px;font-size:16px;border:1px solid transparent;border-radius:var(--pill);background:#fff;color:var(--ink);box-shadow:0 10px 30px rgba(2,6,23,.25);outline:none;font-family:inherit}
.searchwrap input:focus{box-shadow:0 10px 30px rgba(2,6,23,.25),0 0 0 4px rgba(0,120,212,.35)}
.searchwrap .ic{position:absolute;left:20px;top:50%;transform:translateY(-50%);color:var(--muted-2);width:20px;height:20px}
.chips{display:flex;flex-wrap:wrap;gap:9px;justify-content:center;margin-top:18px}
.chip{padding:8px 15px;border-radius:var(--pill);background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);color:#dbe5f3;font-size:13.5px;font-weight:600;cursor:pointer;transition:.15s}
.chip:hover{background:rgba(255,255,255,.2);color:#fff;text-decoration:none}

/* sections */
main{padding:44px 0 80px}
.section{margin-bottom:48px}
.section h2{font-size:23px;font-weight:800;letter-spacing:-.02em;margin-bottom:6px}
.section .sub{color:var(--muted);margin-bottom:22px;font-size:14.5px}

/* category cards */
.cats{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.cat{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-m);padding:26px;box-shadow:var(--sh-s);transition:.16s}
.cat:hover{transform:translateY(-2px);box-shadow:var(--sh-m);border-color:#cdd9ea;text-decoration:none}
.cat .ico{width:42px;height:42px;border-radius:11px;background:var(--sc-blue-t);color:var(--sc-blue);display:grid;place-items:center;font-size:21px;margin-bottom:13px}
.cat h3{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:4px}
.cat p{font-size:13.5px;color:var(--muted)}

/* FAQ rozwinięte */
.faq{display:flex;flex-direction:column;gap:0}
.qa{padding:20px 0;border-bottom:1px solid var(--line-2)}
.qa:last-child{border-bottom:0}
.qa h3{font-size:17px;font-weight:700;color:var(--ink);margin-bottom:8px;display:flex;gap:10px}
.qa h3::before{content:"?";flex-shrink:0;width:24px;height:24px;border-radius:7px;background:var(--sc-blue-t);color:var(--sc-blue);display:grid;place-items:center;font-size:14px;font-weight:800}
.qa .a{color:var(--ink-2);font-size:15px;padding-left:34px}
.qa .a b{color:var(--ink)}
.qa .a code{background:var(--sunken);padding:2px 7px;border-radius:5px;font-size:13px;color:var(--sc-blue-d);font-family:ui-monospace,'SF Mono',Menlo,monospace;word-break:break-word}
.qa .a ol,.qa .a ul{margin:8px 0 0;padding-left:20px}
.qa .a li{margin-bottom:5px}

/* error code cards */
.codes{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:14px}
.codecard{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-m);padding:24px;box-shadow:var(--sh-s);scroll-margin-top:84px}
.codecard .code{display:inline-block;font-family:ui-monospace,'SF Mono',Menlo,monospace;font-size:13px;font-weight:700;color:var(--sc-blue-d);background:var(--sc-blue-t);padding:4px 10px;border-radius:6px;margin-bottom:10px}
.codecard h3{font-size:15.5px;font-weight:700;color:var(--ink);margin-bottom:7px;line-height:1.35}
.codecard .prob{font-size:13.5px;color:var(--muted);margin-bottom:11px}
.codecard .sol{font-size:13.5px;color:var(--ink-2);border-top:1px dashed var(--line);padding-top:11px}
.codecard .sol b{color:var(--ink)}
.codecard .sol code{background:var(--sunken);padding:1px 6px;border-radius:4px;font-size:12px;color:var(--sc-blue-d);font-family:ui-monospace,Menlo,monospace;word-break:break-word}
.nohit{display:none;text-align:center;color:var(--muted);padding:30px;font-size:15px}

/* CTA help block */
.helpcard{background:linear-gradient(135deg,#101a33,#1b2d54);color:#fff;border-radius:var(--r-l);padding:30px;text-align:center;box-shadow:var(--sh-m)}
.helpcard h3{font-size:21px;font-weight:800;margin-bottom:8px}
.helpcard p{color:#c7d2e3;max-width:520px;margin:0 auto 18px;font-size:15px}
.resend-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);padding:28px;box-shadow:var(--sh-s);max-width:560px;margin:0 auto}
.resend-card h3{font-size:18px;font-weight:700;color:var(--ink);margin:0 0 6px}
.resend-card>p{font-size:14px;color:var(--muted);margin:0 0 16px;line-height:1.55}
.resend-card form{display:flex;flex-direction:column;gap:10px}
.resend-card input{padding:12px 14px;border:1px solid var(--line);border-radius:9px;font:inherit;color:var(--ink);background:#fff}
.resend-card input:focus{outline:none;border-color:var(--sc-blue)}
.resend-card button{padding:12px 18px;background:var(--sc-blue);color:#fff;border:none;border-radius:9px;font:inherit;font-weight:600;cursor:pointer;transition:.15s}
.resend-card button:hover{filter:brightness(1.06)}
.resend-card button:disabled{opacity:.6;cursor:default}
.rk-msg{font-size:13px;margin:12px 0 0;line-height:1.5}
.rk-msg.ok{color:var(--sc-blue-d)}
.rk-msg.err{color:#dc2626}
.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 24px;border-radius:var(--pill);font-weight:700;font-size:15px;cursor:pointer;border:0;font-family:inherit;transition:.16s}
.btn-primary{background:var(--sc-blue);color:#fff;box-shadow:var(--sh-blue)}
.btn-primary:hover{background:var(--sc-blue-d);transform:translateY(-1px);text-decoration:none;box-shadow:0 8px 22px rgba(0,120,212,.42)}

/* footer */
.footer{border-top:1px solid var(--line);padding:26px 0;text-align:center;color:var(--muted-2);font-size:13px}
.footer .brand-logo{justify-content:center;font-size:15px;margin-bottom:6px}

/* floating chat */
.fab{position:fixed;right:22px;bottom:22px;z-index:60;width:60px;height:60px;border-radius:50%;background:var(--sc-blue);color:#fff;border:0;cursor:pointer;box-shadow:var(--sh-blue);display:grid;place-items:center;transition:.18s}
.fab:hover{transform:scale(1.06);background:var(--sc-blue-d)}
.fab svg{width:26px;height:26px}
.fab .badge{position:absolute;top:-3px;right:-3px;width:18px;height:18px;border-radius:50%;background:#ef4444;color:#fff;font-size:11px;font-weight:700;display:grid;place-items:center;border:2px solid #fff}
.cw{position:fixed;right:22px;bottom:22px;z-index:61;width:min(400px,calc(100vw - 32px));height:min(620px,calc(100vh - 100px));background:var(--surface);border-radius:var(--r-l);box-shadow:0 24px 70px rgba(2,6,23,.32);display:none;flex-direction:column;overflow:hidden;border:1px solid var(--line)}
.cw.open{display:flex}
.cw-head{display:flex;align-items:center;gap:11px;padding:15px 18px;background:linear-gradient(135deg,#0b1220,#16264a);color:#fff}
.cw-head .dot{width:9px;height:9px;border-radius:50%;background:#22c55e;box-shadow:0 0 0 4px rgba(34,197,94,.2)}
.cw-head .ti{font-weight:700;font-size:15px}
.cw-head .su{font-size:12px;color:rgba(255,255,255,.6);margin-top:1px}
.cw-head .x{margin-left:auto;background:rgba(255,255,255,.12);border:0;color:#fff;width:30px;height:30px;border-radius:8px;cursor:pointer;font-size:18px;line-height:1}
.cw-log{flex:1;overflow-y:auto;padding:18px;display:flex;flex-direction:column;gap:11px;background:#f8fafc}
.m{font-size:14.5px;line-height:1.5;padding:11px 15px;border-radius:14px;max-width:84%;white-space:pre-wrap;word-wrap:break-word}
.m-bot{background:#fff;border:1px solid var(--line);color:var(--ink);align-self:flex-start;border-bottom-left-radius:4px}
.m-user{background:linear-gradient(135deg,var(--sc-blue),var(--sc-blue-d));color:#fff;align-self:flex-end;border-bottom-right-radius:4px}
.m-typing{color:var(--muted-2);font-style:italic}
.cw-foot{padding:13px;border-top:1px solid var(--line);background:#fff}
.cw-form{display:flex;gap:9px}
.cw-input{flex:1;padding:12px 16px;border:1px solid var(--line);border-radius:var(--pill);font-size:14.5px;outline:none;font-family:inherit}
.cw-input:focus{border-color:var(--sc-blue);box-shadow:0 0 0 3px rgba(0,120,212,.13)}
.cw-send{background:var(--sc-blue);color:#fff;border:0;width:44px;height:44px;border-radius:50%;cursor:pointer;display:grid;place-items:center;flex-shrink:0}
.cw-send:hover{background:var(--sc-blue-d)}
.cw-send:disabled{opacity:.5;cursor:not-allowed}
.cw-send svg{width:18px;height:18px}
.cw-note{font-size:11px;color:var(--muted-2);text-align:center;padding:8px 0 2px}
@media(max-width:640px){
  .cw{right:0;bottom:0;width:100vw;height:100dvh;border-radius:0}
  .fab{right:16px;bottom:16px}
  .codes{grid-template-columns:1fr}
}