:root{
  --ink:#0f2236; --ink-2:#3d4f63; --muted:#6b7b8c; --line:#e3e8ee;
  --bg:#f5f7fa; --card:#fff; --brand:#0e5e6f; --brand-2:#0a4754;
  --accent:#e8772e; --ok:#1d8a4e; --ok-bg:#e8f6ee; --err:#c23a2b; --err-bg:#fdecea;
  --radius:12px; --shadow:0 1px 2px rgba(15,34,54,.06),0 4px 16px rgba(15,34,54,.06);
}
*{box-sizing:border-box}
html,body{margin:0}
body{font-family:"Plus Jakarta Sans",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--ink);background:var(--bg);line-height:1.55;font-size:15px}
a{color:var(--brand);text-decoration:none} a:hover{text-decoration:underline}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}

/* nav */
.nav{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:12px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);font-size:17px;letter-spacing:-.2px}
.logo:hover{text-decoration:none}
.logo-mark{width:32px;height:32px;border-radius:8px;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:13px;font-weight:800}
.nav-links{display:flex;gap:10px;align-items:center}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:10px;padding:10px 18px;font:inherit;font-weight:600;cursor:pointer;transition:.15s;white-space:nowrap}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--brand);color:#fff} .btn-primary:hover{background:var(--brand-2)}
.btn-accent{background:var(--accent);color:#fff} .btn-accent:hover{filter:brightness(.95)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)} .btn-ghost:hover{border-color:#c5cfd9}
.btn-sm{padding:6px 12px;font-size:13px;border-radius:8px}
.btn[disabled]{opacity:.6;cursor:not-allowed}
.btn-danger{background:#fff;color:var(--err);border-color:#f2c4be}

/* hero */
.hero{padding:72px 0 56px;background:linear-gradient(180deg,#fff 0%,var(--bg) 100%)}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.eyebrow{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--brand);background:#e3f1f3;padding:5px 10px;border-radius:999px}
h1{font-size:44px;line-height:1.12;letter-spacing:-1px;margin:16px 0 16px}
.lead{font-size:18px;color:var(--ink-2);max-width:520px}
.hero-cta{display:flex;gap:12px;margin-top:28px;flex-wrap:wrap}
.demo-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:var(--shadow)}
.demo-row{display:flex;justify-content:space-between;padding:12px 0;border-bottom:1px dashed var(--line);font-size:14px}
.demo-row:last-child{border:0}
.demo-row span:first-child{color:var(--muted)}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;letter-spacing:.3px}

section{padding:56px 0}
h2{font-size:28px;letter-spacing:-.5px;margin:0 0 8px}
.sub{color:var(--muted);margin:0 0 32px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feature{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.feature .num{width:32px;height:32px;border-radius:8px;background:#fdf1e8;color:var(--accent);font-weight:800;display:grid;place-items:center;margin-bottom:14px}
.feature h3{margin:0 0 6px;font-size:16px}
.feature p{margin:0;color:var(--ink-2);font-size:14px}

footer{border-top:1px solid var(--line);padding:28px 0;color:var(--muted);font-size:13px;background:#fff}
footer .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}

/* forms */
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}
label{font-size:13px;font-weight:600;color:var(--ink-2)}
input,select{font:inherit;padding:11px 14px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);width:100%}
input:focus,select:focus{outline:2px solid #b8dde3;border-color:var(--brand)}
.auth-box{max-width:420px;margin:56px auto;background:#fff;border:1px solid var(--line);border-radius:16px;padding:32px;box-shadow:var(--shadow)}
.auth-box h1{font-size:26px;margin:0 0 6px}
.tabs{display:flex;background:var(--bg);border-radius:10px;padding:4px;margin:20px 0}
.tabs button{flex:1;border:0;background:none;padding:9px;border-radius:8px;font:inherit;font-weight:600;color:var(--muted);cursor:pointer}
.tabs button.active{background:#fff;color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.08)}
.note{font-size:13px;color:var(--muted)}
.alert{padding:12px 14px;border-radius:10px;font-size:14px;margin-bottom:16px;display:none}
.alert.show{display:block}
.alert.err{background:var(--err-bg);color:var(--err)}
.alert.ok{background:var(--ok-bg);color:var(--ok)}

/* dashboard */
.dash{display:grid;grid-template-columns:220px 1fr;min-height:calc(100vh - 64px)}
.side{background:#fff;border-right:1px solid var(--line);padding:20px 12px}
.side a{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:8px;color:var(--ink-2);font-weight:600;font-size:14px;margin-bottom:2px}
.side a:hover{background:var(--bg);text-decoration:none}
.side a.active{background:#e3f1f3;color:var(--brand)}
.main{padding:28px 32px;min-width:0}
.page-head{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;margin-bottom:24px;flex-wrap:wrap}
.page-head h1{font-size:26px;margin:0}
.page-head p{margin:4px 0 0;color:var(--muted)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;margin-bottom:20px}
.card h3{margin:0 0 16px;font-size:16px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:20px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px}
.stat .k{font-size:12px;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.05em}
.stat .v{font-size:28px;font-weight:800;margin-top:4px;letter-spacing:-.5px}
.search-row{display:flex;gap:12px}
.search-row input{font-size:18px;text-transform:uppercase;letter-spacing:1.5px;font-family:ui-monospace,Menlo,Consolas,monospace}
.result{margin-top:20px;border:1px solid var(--line);border-radius:12px;overflow:hidden;display:none}
.result.show{display:block}
.result-head{padding:12px 18px;background:var(--ok-bg);color:var(--ok);font-weight:700;font-size:14px}
.result.fail .result-head{background:var(--err-bg);color:var(--err)}
.result-body{display:grid;grid-template-columns:1fr 1fr}
.result-item{padding:18px;border-right:1px solid var(--line)}
.result-item:last-child{border:0}
.result-item .k{font-size:12px;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.05em}
.result-item .v{font-size:18px;font-weight:700;margin-top:4px;display:flex;align-items:center;gap:8px;word-break:break-all}
.copy{border:1px solid var(--line);background:#fff;border-radius:6px;font-size:11px;padding:3px 7px;cursor:pointer;color:var(--muted)}

/* tables */
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:14px}
th{text-align:left;font-size:12px;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.04em;padding:10px 12px;border-bottom:1px solid var(--line);white-space:nowrap}
td{padding:12px;border-bottom:1px solid var(--line);vertical-align:middle}
tr:last-child td{border-bottom:0}
.pill{display:inline-block;padding:3px 9px;border-radius:999px;font-size:12px;font-weight:700}
.pill.ok{background:var(--ok-bg);color:var(--ok)}
.pill.err{background:var(--err-bg);color:var(--err)}
.pill.muted{background:var(--bg);color:var(--muted)}
.empty{text-align:center;color:var(--muted);padding:32px}
.toolbar{display:flex;gap:10px;margin-bottom:16px;flex-wrap:wrap}
.toolbar input{max-width:280px}
.bars{display:flex;align-items:flex-end;gap:6px;height:140px;padding-top:10px}
.bar{flex:1;background:var(--brand);border-radius:4px 4px 0 0;min-height:2px;position:relative}
.bar span{position:absolute;bottom:-20px;left:50%;transform:translateX(-50%);font-size:10px;color:var(--muted);white-space:nowrap}
.bar:hover::after{content:attr(data-n);position:absolute;top:-22px;left:50%;transform:translateX(-50%);font-size:11px;font-weight:700}
.hidden{display:none!important}
dialog{border:0;border-radius:14px;padding:24px;width:min(400px,92vw);box-shadow:0 20px 60px rgba(0,0,0,.2)}
dialog::backdrop{background:rgba(15,34,54,.4)}
.loader{display:grid;place-items:center;min-height:60vh;color:var(--muted)}

@media (max-width:860px){
  .hero-grid{grid-template-columns:1fr} h1{font-size:34px}
  .grid-2{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}
.grid-3{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr 1fr}
  .dash{grid-template-columns:1fr}
  .side{display:flex;overflow-x:auto;border-right:0;border-bottom:1px solid var(--line);padding:8px}
  .side a{white-space:nowrap;margin:0}
  .main{padding:20px 16px}
  .search-row{flex-direction:column}
  .result-body{grid-template-columns:1fr}
  .result-item{border-right:0;border-bottom:1px solid var(--line)}
  .nav-links .hide-sm{display:none}
}

/* wallet */
.amount-chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 16px;font:inherit;font-weight:600;cursor:pointer;color:var(--ink)}
.chip:hover{border-color:#c5cfd9}
.chip.on{background:#e3f1f3;border-color:var(--brand);color:var(--brand)}
.wallet-chip b{margin-left:6px;color:var(--brand)}
.price-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px;box-shadow:var(--shadow);max-width:440px}
.price-big{font-size:44px;font-weight:800;letter-spacing:-1px;line-height:1}
.price-big small{font-size:16px;font-weight:600;color:var(--muted);letter-spacing:0}
.price-list{list-style:none;padding:0;margin:18px 0 22px}
.price-list li{padding:7px 0 7px 26px;position:relative;color:var(--ink-2)}
.price-list li::before{content:"✓";position:absolute;left:0;color:var(--ok);font-weight:800}