:root{
  --bg:#0b0f17;--bg2:#111827;--card:#151c2c;--card2:#1b2335;--line:#26304a;--line2:#334064;
  --text:#e6eaf2;--muted:#98a2b8;--dim:#6b7590;
  --accent:#5eead4;--accent2:#22d3ee;--accent-ink:#052e2b;
  --ok:#34d399;--warn:#fbbf24;--bad:#f87171;--info:#60a5fa;
  --radius:14px;--radius-sm:9px;--shadow:0 10px 40px rgba(0,0,0,.35);
  --font:ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);line-height:1.55;font-size:16px}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.15;margin:0 0 .5em;font-weight:700;letter-spacing:-.01em}
h1{font-size:clamp(2rem,5vw,3.4rem)}h2{font-size:clamp(1.5rem,3vw,2.1rem)}h3{font-size:1.2rem}
p{margin:0 0 1em}
code,pre{font-family:var(--mono);font-size:.9em}
code{background:var(--card2);padding:.12em .4em;border-radius:5px;border:1px solid var(--line)}
pre{background:#0a0e16;border:1px solid var(--line);border-radius:var(--radius-sm);padding:14px 16px;overflow:auto;line-height:1.5}
pre code{background:none;border:0;padding:0}
img,svg{max-width:100%}
.container{max-width:1080px;margin:0 auto;padding:0 20px}
.narrow{max-width:760px}
.muted{color:var(--muted)}.dim{color:var(--dim)}.small{font-size:.88rem}.tiny{font-size:.78rem}
.mono{font-family:var(--mono)}
.center{text-align:center}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.between{justify-content:space-between}
.grid{display:grid;gap:18px}
.grid-2{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.grid-3{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.mt{margin-top:24px}.mt2{margin-top:48px}.mb{margin-bottom:24px}
hr{border:0;border-top:1px solid var(--line);margin:32px 0}
/* nav */
.nav{display:flex;align-items:center;justify-content:space-between;padding:18px 0;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.15rem;color:var(--text);letter-spacing:-.02em}
.brand:hover{text-decoration:none}
.brand .logo{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,var(--accent),var(--accent2));display:grid;place-items:center;color:var(--accent-ink);font-weight:900}
.nav-links{display:flex;gap:22px;align-items:center}
.nav-links a{color:var(--muted);font-weight:500}.nav-links a:hover{color:var(--text);text-decoration:none}
@media(max-width:640px){.nav-links a.hide-sm{display:none}}
/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 18px;border-radius:10px;border:1px solid var(--line2);background:var(--card2);color:var(--text);font-weight:600;cursor:pointer;font-size:.95rem;line-height:1.2;transition:.15s;white-space:nowrap}
.btn:hover{border-color:var(--accent);text-decoration:none;transform:translateY(-1px)}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:var(--accent-ink);border-color:transparent}
.btn-primary:hover{filter:brightness(1.07)}
.btn-ghost{background:transparent}
.btn-sm{padding:6px 12px;font-size:.85rem;border-radius:8px}
.btn-danger{border-color:#7f1d1d;color:#fca5a5}
.btn-lg{padding:14px 26px;font-size:1.05rem}
/* cards */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.card h3{margin-top:0}
.card.soft{background:var(--bg2)}
.feature .icon{width:40px;height:40px;border-radius:10px;background:var(--card2);display:grid;place-items:center;margin-bottom:12px;font-size:1.2rem}
/* forms */
label{display:block;font-size:.85rem;color:var(--muted);margin-bottom:6px;font-weight:500}
input,select,textarea{width:100%;background:#0c111b;color:var(--text);border:1px solid var(--line2);border-radius:9px;padding:10px 12px;font-size:.95rem;font-family:inherit}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(94,234,212,.15)}
input.mono,textarea.mono{font-family:var(--mono);font-size:.88rem}
.field{margin-bottom:16px}
.help{font-size:.8rem;color:var(--dim);margin-top:5px}
.inline{display:flex;gap:10px}.inline>*{flex:1}
/* badges */
.badge{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;border-radius:999px;font-size:.78rem;font-weight:600;border:1px solid var(--line2);background:var(--card2);color:var(--muted)}
.badge.pending{color:var(--warn);border-color:#6b4d0b;background:#2a2008}
.badge.paid{color:var(--info);border-color:#1e3a8a;background:#0f1b3a}
.badge.confirmed{color:var(--ok);border-color:#065f46;background:#06281f}
.badge.expired{color:var(--dim)}
.badge.pro{color:var(--accent);border-color:#0f5f57;background:#07302b}
.dot{width:8px;height:8px;border-radius:50%;background:currentColor;display:inline-block}
.pulse{animation:pulse 1.4s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
/* tables */
table{width:100%;border-collapse:collapse;font-size:.9rem}
th,td{text-align:left;padding:10px 10px;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--muted);font-weight:600;font-size:.8rem;text-transform:uppercase;letter-spacing:.04em}
tr:hover td{background:rgba(255,255,255,.015)}
.table-wrap{overflow-x:auto}
/* hero */
.hero{padding:72px 0 40px}
.hero h1{max-width:820px}
.hero .lead{font-size:1.2rem;color:var(--muted);max-width:680px}
.eyebrow{display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin-bottom:14px}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0}
.chip{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:999px;background:var(--card);border:1px solid var(--line);font-size:.85rem;font-weight:600}
.chip i{width:10px;height:10px;border-radius:50%;display:inline-block}
section{padding:44px 0}
.steps{counter-reset:s}
.step{position:relative;padding-left:56px}
.step::before{counter-increment:s;content:counter(s);position:absolute;left:0;top:0;width:40px;height:40px;border-radius:50%;background:var(--card2);border:1px solid var(--line2);display:grid;place-items:center;font-weight:800;color:var(--accent)}
/* alerts */
.alert{padding:12px 14px;border-radius:10px;border:1px solid var(--line2);background:var(--card2);font-size:.9rem}
.alert.ok{border-color:#065f46;background:#06281f;color:#a7f3d0}
.alert.warn{border-color:#6b4d0b;background:#2a2008;color:#fde68a}
.alert.bad{border-color:#7f1d1d;background:#2a0d0d;color:#fecaca}
.alert.info{border-color:#1e3a8a;background:#0f1b3a;color:#bfdbfe}
/* tabs */
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:22px;overflow-x:auto}
.tab{padding:10px 14px;color:var(--muted);font-weight:600;border-bottom:2px solid transparent;cursor:pointer;white-space:nowrap;background:none;border-top:0;border-left:0;border-right:0;font-size:.95rem;font-family:inherit}
.tab.active{color:var(--text);border-bottom-color:var(--accent)}
/* footer */
footer{border-top:1px solid var(--line);margin-top:60px;padding:34px 0;color:var(--dim);font-size:.88rem}
footer a{color:var(--muted)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:24px}
@media(max-width:720px){.footer-grid{grid-template-columns:1fr 1fr}}
/* copy field */
.copy{display:flex;align-items:stretch;gap:6px}
.copy .val{flex:1;background:#0c111b;border:1px solid var(--line2);border-radius:9px;padding:9px 12px;font-family:var(--mono);font-size:.86rem;word-break:break-all;min-width:0}
.copy button{flex:none}
/* invoice page */
.invoice-wrap{max-width:520px;margin:40px auto;padding:0 16px}
.invoice{background:var(--card);border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:var(--shadow)}
.invoice .head{padding:20px 22px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:12px}
.invoice .body{padding:22px}
.amount{font-size:2rem;font-weight:800;letter-spacing:-.02em;font-family:var(--mono)}
.qr{background:#fff;border-radius:12px;padding:12px;display:inline-block;margin:0 auto}
.qr svg{display:block}
.kv{display:grid;grid-template-columns:110px 1fr;gap:6px 12px;font-size:.9rem}
.kv dt{color:var(--muted)}.kv dd{margin:0;word-break:break-all;font-family:var(--mono);font-size:.85rem}
.timer{font-variant-numeric:tabular-nums}
.big-check{font-size:3rem;line-height:1}
.faq details{border-bottom:1px solid var(--line);padding:14px 0}
.faq summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between}
.faq summary::after{content:"+";color:var(--accent)}
.faq details[open] summary::after{content:"–"}
.price{font-size:2.4rem;font-weight:800;letter-spacing:-.02em}
.price small{font-size:1rem;color:var(--muted);font-weight:500}
ul.check{list-style:none;padding:0;margin:0}
ul.check li{padding:6px 0 6px 26px;position:relative}
ul.check li::before{content:"✓";position:absolute;left:0;color:var(--ok);font-weight:800}
.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);background:var(--card2);border:1px solid var(--line2);padding:10px 16px;border-radius:10px;font-size:.9rem;z-index:50;box-shadow:var(--shadow)}
.spinner{width:16px;height:16px;border:2px solid var(--line2);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite;display:inline-block;vertical-align:middle}
@keyframes spin{to{transform:rotate(360deg)}}
.kbd{font-family:var(--mono);font-size:.8rem;background:var(--card2);border:1px solid var(--line2);padding:2px 6px;border-radius:5px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}