:root{
  --brand-1:#4F7BFF; --brand-2:#3FDB8B;
  --ink:#0f172a; --muted:#64748b; --line:rgba(15,23,42,.08);
  --bg:#ffffff; --bg-soft:#f6f8fc; --dark:#0b1220;
  --radius:16px; --maxw:1140px;
  --grad:linear-gradient(120deg,var(--brand-1),var(--brand-2));
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; color:var(--ink); background:var(--bg);
  font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  line-height:1.6; -webkit-font-smoothing:antialiased;
}
a{color:inherit; text-decoration:none}
img,svg{max-width:100%}
.container{max-width:var(--maxw); margin:0 auto; padding:0 20px}
.muted{color:var(--muted)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:.5rem;
  padding:.85rem 1.35rem; border-radius:12px; font-weight:700; border:1px solid transparent;
  cursor:pointer; transition:transform .08s ease, box-shadow .2s ease, background .2s;
  white-space:nowrap;
}
.btn-sm{padding:.55rem .95rem; border-radius:10px; font-size:.92rem}
.btn-primary{color:#fff; background:var(--grad); box-shadow:0 10px 24px rgba(79,123,255,.28)}
.btn-primary:hover{box-shadow:0 14px 30px rgba(63,219,139,.32)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:#fff; border-color:var(--line); color:var(--ink)}
.btn-ghost:hover{border-color:#c7d2fe}
.btn-light{background:rgba(255,255,255,.14); color:#fff; border-color:rgba(255,255,255,.25)}
.btn-light:hover{background:rgba(255,255,255,.22)}

/* ---------- Header / Nav ---------- */
.site-header{position:sticky; top:0; z-index:50; background:rgba(255,255,255,.82); backdrop-filter:blur(10px); border-bottom:1px solid var(--line)}
.nav{display:flex; align-items:center; justify-content:space-between; height:70px}
.brand{display:flex; align-items:center; gap:.6rem; font-weight:800; letter-spacing:-.01em}
.brand-mark{display:inline-flex; width:38px; height:38px}
.brand-mark svg{width:38px; height:38px}
.brand-text{font-size:1.12rem}
.nav-links{display:flex; align-items:center; gap:1.35rem}
.nav-links a{font-weight:600; color:#334155; font-size:.96rem}
.nav-links a:hover{color:var(--ink)}
.nav-links a.active{color:var(--brand-1)}
.nav-burger{display:none; flex-direction:column; gap:5px; cursor:pointer; padding:8px}
.nav-burger span{width:24px; height:2px; background:var(--ink); border-radius:2px}

/* ---------- Hero ---------- */
.hero{position:relative; overflow:hidden; background:var(--dark); color:#e5e7eb}
.hero::before,.hero::after{content:""; position:absolute; border-radius:50%; filter:blur(60px); opacity:.55}
.hero::before{width:520px; height:520px; left:-140px; top:-160px; background:radial-gradient(50% 50% at 50% 50%, rgba(79,123,255,.55), transparent 70%)}
.hero::after{width:560px; height:560px; right:-160px; bottom:-220px; background:radial-gradient(50% 50% at 50% 50%, rgba(63,219,139,.5), transparent 70%)}
.hero-inner{position:relative; z-index:1; display:grid; grid-template-columns:1.15fr .85fr; gap:40px; align-items:center; padding:84px 0 92px}
.eyebrow{display:inline-flex; align-items:center; gap:.5rem; padding:.35rem .8rem; border:1px solid rgba(255,255,255,.16); border-radius:999px; font-size:.82rem; color:#cbd5e1; margin-bottom:18px}
.eyebrow .dot{width:8px; height:8px; border-radius:50%; background:var(--brand-2); box-shadow:0 0 0 4px rgba(63,219,139,.2)}
.hero h1{font-size:clamp(2rem,4.6vw,3.3rem); line-height:1.08; margin:0 0 16px; color:#fff; letter-spacing:-.02em}
.hero h1 .grad{background:var(--grad); -webkit-background-clip:text; background-clip:text; color:transparent}
.hero p.lead{font-size:1.12rem; color:#cbd5e1; margin:0 0 26px; max-width:36ch}
.hero-cta{display:flex; gap:12px; flex-wrap:wrap}
.hero-stats{display:flex; gap:28px; margin-top:34px; flex-wrap:wrap}
.hero-stats .s{display:flex; flex-direction:column}
.hero-stats .s b{font-size:1.5rem; color:#fff}
.hero-stats .s span{font-size:.82rem; color:#94a3b8}

/* hero card mock */
.hero-card{background:linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,.03)); border:1px solid rgba(255,255,255,.12); border-radius:20px; padding:20px; box-shadow:0 30px 60px rgba(0,0,0,.35)}
.hero-card .row{display:flex; align-items:center; gap:12px; padding:12px; border-radius:12px; background:rgba(255,255,255,.05); margin-bottom:10px}
.hero-card .row:last-child{margin-bottom:0}
.hero-card .ic{width:40px; height:40px; border-radius:10px; background:var(--grad); display:grid; place-items:center; color:#fff; flex:0 0 auto}
.hero-card .t{font-weight:700; color:#fff; font-size:.95rem}
.hero-card .d{font-size:.8rem; color:#94a3b8}

/* ---------- Sections ---------- */
section{padding:76px 0}
.section-head{text-align:center; max-width:640px; margin:0 auto 44px}
.section-head .kicker{color:var(--brand-1); font-weight:800; letter-spacing:.08em; text-transform:uppercase; font-size:.8rem}
.section-head h2{font-size:clamp(1.6rem,3.2vw,2.3rem); margin:.4rem 0 .6rem; letter-spacing:-.02em}
.section-head p{color:var(--muted); margin:0}
.bg-soft{background:var(--bg-soft)}

/* feature grid */
.grid{display:grid; gap:20px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:24px; transition:transform .12s ease, box-shadow .2s ease}
.card:hover{transform:translateY(-3px); box-shadow:0 18px 40px rgba(2,6,23,.08)}
.card .chip{width:48px; height:48px; border-radius:12px; background:var(--grad); display:grid; place-items:center; color:#fff; margin-bottom:16px}
.card h3{margin:0 0 8px; font-size:1.12rem}
.card p{margin:0; color:var(--muted); font-size:.96rem}

/* product / pricing */
.plans{display:grid; grid-template-columns:repeat(3,1fr); gap:20px; align-items:stretch}
.plan{background:#fff; border:1px solid var(--line); border-radius:18px; padding:28px; display:flex; flex-direction:column}
.plan.featured{border-color:transparent; background:var(--dark); color:#e5e7eb; box-shadow:0 24px 60px rgba(2,6,23,.25); position:relative}
.plan.featured .badge{position:absolute; top:16px; right:16px; background:var(--grad); color:#fff; font-size:.72rem; font-weight:800; padding:.25rem .6rem; border-radius:999px}
.plan h3{margin:0 0 4px; font-size:1.2rem}
.plan .price{font-size:1.9rem; font-weight:800; margin:8px 0}
.plan .price small{font-size:.9rem; font-weight:600; color:var(--muted)}
.plan.featured .price small{color:#94a3b8}
.plan ul{list-style:none; padding:0; margin:16px 0 22px; display:grid; gap:10px}
.plan li{display:flex; gap:.6rem; align-items:flex-start; font-size:.95rem}
.plan li svg{flex:0 0 auto; margin-top:3px; color:var(--brand-2)}
.plan .btn{margin-top:auto}

/* CTA band */
.cta{background:var(--grad); color:#fff; border-radius:22px; padding:48px; text-align:center; box-shadow:0 24px 60px rgba(79,123,255,.28)}
.cta h2{margin:0 0 8px; font-size:clamp(1.5rem,3vw,2.1rem)}
.cta p{margin:0 0 22px; opacity:.92}

/* ---------- Article (terms) ---------- */
.page-hero{background:var(--bg-soft); border-bottom:1px solid var(--line); padding:56px 0}
.page-hero h1{margin:0 0 6px; font-size:clamp(1.8rem,3.4vw,2.4rem)}
.article{max-width:820px; margin:0 auto; padding:56px 20px}
.article h2{margin:34px 0 10px; font-size:1.25rem}
.article h2:first-child{margin-top:0}
.article p, .article li{color:#334155}
.article ul{padding-left:20px}
.article .note{background:var(--bg-soft); border:1px solid var(--line); border-radius:12px; padding:16px 18px; color:var(--muted); font-size:.95rem}

/* contact */
.contact-grid{display:grid; grid-template-columns:1fr 1fr; gap:24px; align-items:stretch}
.contact-card{background:#fff; border:1px solid var(--line); border-radius:18px; padding:28px}
.contact-card .big{display:flex; align-items:center; gap:14px; margin-bottom:8px}
.contact-card .ic{width:52px; height:52px; border-radius:14px; background:var(--grad); display:grid; place-items:center; color:#fff}
.contact-card h3{margin:0; font-size:1.15rem}
.contact-list{display:grid; gap:14px; margin-top:8px}
.contact-list a{display:flex; align-items:center; gap:12px; padding:14px 16px; border:1px solid var(--line); border-radius:12px; font-weight:600}
.contact-list a:hover{border-color:#c7d2fe; background:var(--bg-soft)}
.contact-list .ic{width:38px; height:38px; border-radius:10px; background:var(--bg-soft); display:grid; place-items:center; color:var(--brand-1)}

/* ---------- Footer ---------- */
.site-footer{background:var(--dark); color:#cbd5e1; padding:56px 0 26px; margin-top:20px}
.footer-grid{display:grid; grid-template-columns:1.4fr 1fr 1fr; gap:34px}
.site-footer .brand-text{color:#fff}
.site-footer .brand-mark svg{width:34px; height:34px}
.footer-col h4{color:#fff; font-size:.95rem; margin:0 0 12px}
.footer-col a{display:block; color:#94a3b8; padding:5px 0; font-size:.94rem}
.footer-col a:hover{color:#fff}
.footer-brand p{max-width:36ch; font-size:.94rem; color:#94a3b8}
.footer-bottom{display:flex; justify-content:space-between; gap:12px; flex-wrap:wrap; border-top:1px solid rgba(255,255,255,.08); margin-top:34px; padding-top:20px; font-size:.85rem; color:#64748b}

/* WA float */
.wa-float{position:fixed; right:20px; bottom:20px; z-index:60; width:56px; height:56px; border-radius:50%; background:#25D366; color:#fff; display:grid; place-items:center; box-shadow:0 12px 28px rgba(37,211,102,.4); transition:transform .12s ease}
.wa-float:hover{transform:scale(1.06)}

/* ---------- Responsive ---------- */
@media (max-width:960px){
  .hero-inner{grid-template-columns:1fr; padding:64px 0 72px}
  .hero-card{order:-1; display:none}
  .grid-3,.plans{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:720px){
  .nav-burger{display:flex}
  .nav-links{position:absolute; top:70px; left:0; right:0; flex-direction:column; align-items:stretch; gap:0; background:#fff; border-bottom:1px solid var(--line); padding:8px 20px 16px; box-shadow:0 20px 40px rgba(2,6,23,.08); display:none}
  .nav-links a{padding:12px 4px; border-bottom:1px solid var(--line)}
  .nav-links a.btn{margin-top:10px; border-bottom:none}
  .nav-toggle:checked ~ .nav-links{display:flex}
  .grid-3,.grid-2,.plans,.contact-grid,.footer-grid{grid-template-columns:1fr}
  .cta{padding:34px 22px}
  .footer-bottom{flex-direction:column}
}