:root{
  --bg:#0b0e14; --bg2:#121722; --panel:#161c29; --panel2:#1d2536;
  --line:#263043; --text:#e6ebf5; --muted:#93a0b8; --accent:#4f8cff; --accent2:#6ee7b7;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:'Inter',system-ui,sans-serif;color:var(--text);background:var(--bg);line-height:1.55}
h1,h2,h3{font-family:'Inter',sans-serif;line-height:1.15;margin:0 0 .5em}
h1{font-size:clamp(2rem,4.5vw,3.2rem);font-weight:800;letter-spacing:-.02em}
h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:700}
h3{font-size:1.05rem;font-weight:600}
p{margin:0 0 1em}
a{color:var(--accent);text-decoration:none}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}
.narrow{max-width:760px}
.wrap.narrow{margin-left:auto;margin-right:auto}
.muted{color:var(--muted);font-size:.92rem}
.kicker{color:var(--accent2);font-weight:600;letter-spacing:.04em;text-transform:uppercase;font-size:.78rem;margin-bottom:.6em}

/* top bar */
.topbar{position:sticky;top:0;z-index:50;background:rgba(11,14,20,.85);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:14px 24px}
.brand{font-weight:800;font-size:1.1rem;color:var(--text)}
.logo{color:var(--accent)}
nav{display:flex;gap:22px;align-items:center;flex-wrap:wrap}
nav a{color:var(--muted);font-size:.92rem}
nav a:hover{color:var(--text)}

/* buttons */
.btn{display:inline-block;background:var(--accent);color:#fff;font-weight:600;padding:12px 22px;border-radius:10px;border:0;cursor:pointer;font-size:.95rem;transition:transform .05s,background .15s}
.btn:hover{background:#3f7bef}
.btn:active{transform:translateY(1px)}
.btn-sm{padding:8px 16px;font-size:.85rem}
.btn-ghost{background:transparent;border:1px solid var(--line);color:var(--text)}
.btn-ghost:hover{background:var(--panel2)}
button.btn{width:100%;margin-top:6px}

/* hero */
.hero{padding:80px 0 60px;background:radial-gradient(1000px 500px at 70% -10%,rgba(79,140,255,.18),transparent),var(--bg)}
.hero .lede{font-size:1.15rem;color:var(--muted);max-width:640px}
.cta-row{display:flex;gap:14px;flex-wrap:wrap;margin:22px 0 30px}
.specs{display:flex;gap:26px;flex-wrap:wrap;list-style:none;padding:0;margin:0;color:var(--muted);font-size:.9rem}
.specs b{color:var(--text)}

/* sections */
.section{padding:64px 0}
.section.alt{background:var(--bg2)}
.section.compact{padding:48px 0}
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
@media(max-width:820px){.split{grid-template-columns:1fr}}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:28px}
@media(max-width:820px){.steps{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.steps{grid-template-columns:1fr}}
.step{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:20px}
.step span{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:8px;background:var(--accent);color:#fff;font-weight:700;margin-bottom:12px}
.step p{color:var(--muted);font-size:.92rem;margin:0}

/* checks */
.checks{list-style:none;padding:0;margin:0 0 14px}
.checks li{padding:6px 0 6px 26px;position:relative;color:var(--muted)}
.checks li::before{content:"✓";position:absolute;left:0;color:var(--accent2);font-weight:700}

/* card / forms */
.card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:26px}
.card h3{margin-bottom:16px}
.input, .card input, .card textarea, .card select{width:100%;background:var(--bg2);border:1px solid var(--line);border-radius:9px;color:var(--text);padding:11px 13px;font-size:.94rem;font-family:'Inter',sans-serif;margin-top:5px}
.input:focus, .card input:focus, .card textarea:focus{outline:none;border-color:var(--accent)}
.card label{display:block;margin:0 0 14px;font-size:.86rem;color:var(--muted)}
.form-msg{margin:12px 0 0;min-height:1em;font-weight:600;color:var(--accent2)}
.form-msg.err{color:#ff7a7a}

/* faq */
details{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin-bottom:12px}
summary{cursor:pointer;font-weight:600}
details p{color:var(--muted);margin:10px 0 0}

/* footer */
.footer{border-top:1px solid var(--line);padding:36px 0;background:var(--bg2)}
.footer .brand{display:block;margin-bottom:6px}
.footer p{color:var(--muted);font-size:.9rem;max-width:640px}