:root{
  --brand:#0f9d6b; --brand-d:#0a7a53; --brand-l:#e6f6ef;
  --accent:#ff7a1a; --ink:#14201b; --muted:#5f6f68; --line:#e3e9e6;
  --bg:#f6f8f7; --card:#fff; --danger:#d93838; --warn:#e8a317;
  --r:14px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Be Vietnam Pro',system-ui,sans-serif;background:var(--bg);color:var(--ink);line-height:1.5;-webkit-font-smoothing:antialiased}
button,input,select{font:inherit}
a{color:var(--brand-d)}
.wrap{max-width:1080px;margin:0 auto;padding:0 18px}

/* header */
header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.nav{display:flex;align-items:center;gap:18px;height:64px}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:20px;color:var(--ink);text-decoration:none;cursor:pointer}
.logo i{width:34px;height:34px;border-radius:10px;background:var(--brand);display:grid;place-items:center;color:#fff;font-style:normal;font-size:17px}
.links{display:flex;gap:4px;margin-left:12px}
.links a{padding:8px 12px;border-radius:9px;text-decoration:none;color:var(--muted);font-weight:500;font-size:15px}
.links a:hover{background:var(--bg);color:var(--ink)}
.links a.on{background:var(--brand-l);color:var(--brand-d)}
.nav-r{margin-left:auto;display:flex;align-items:center;gap:10px}
.bal-chip{display:flex;align-items:center;gap:7px;background:var(--brand-l);color:var(--brand-d);padding:7px 12px;border-radius:99px;font-weight:700;font-size:14px;cursor:pointer;border:none}
.btn{border:none;border-radius:10px;padding:10px 18px;font-weight:600;cursor:pointer;transition:.15s}
.btn-p{background:var(--brand);color:#fff}.btn-p:hover{background:var(--brand-d)}
.btn-o{background:#fff;border:1px solid var(--line);color:var(--ink)}.btn-o:hover{border-color:var(--brand);color:var(--brand-d)}
.btn-a{background:var(--accent);color:#fff}.btn-a:hover{filter:brightness(.95)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.menu-btn{display:none;background:none;border:none;font-size:24px;cursor:pointer}

/* hero */
.hero{background:linear-gradient(135deg,#0f9d6b 0%,#0b7d57 60%,#086345 100%);color:#fff;padding:56px 0 70px;position:relative;overflow:hidden}
.hero:after{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;background:rgba(255,255,255,.06)}
.hero h1{font-size:40px;line-height:1.15;font-weight:800;max-width:640px;letter-spacing:-.5px}
.hero h1 em{font-style:normal;color:#ffd166}
.hero p.sub{opacity:.9;margin-top:12px;font-size:17px;max-width:560px}
.paste{margin-top:28px;background:#fff;border-radius:16px;padding:8px;display:flex;gap:8px;max-width:720px;box-shadow:0 12px 40px rgba(0,0,0,.18);position:relative;z-index:2}
.paste input{flex:1;border:none;outline:none;padding:12px 14px;font-size:16px;color:var(--ink);min-width:0}
.paste .btn{padding:12px 22px;font-size:16px}
.hint{font-size:13px;opacity:.85;margin-top:10px}
.hint button{background:rgba(255,255,255,.18);border:none;color:#fff;padding:3px 9px;border-radius:6px;cursor:pointer;font-size:13px;margin-left:4px}

/* result card */
.result{max-width:720px;margin-top:16px;background:#fff;color:var(--ink);border-radius:16px;padding:20px;display:none;position:relative;z-index:2;box-shadow:0 12px 40px rgba(0,0,0,.18)}
.result.show{display:block;animation:pop .25s ease}
@keyframes pop{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.prod{display:flex;gap:16px;align-items:flex-start}
.thumb{width:84px;height:84px;border-radius:12px;flex-shrink:0;display:grid;place-items:center;font-size:38px}
.prod h3{font-size:16px;font-weight:600;line-height:1.35}
.prod .meta{font-size:13px;color:var(--muted);margin-top:4px}
.cb-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:18px 0}
.cb-box{background:var(--bg);border-radius:12px;padding:12px}
.cb-box small{color:var(--muted);font-size:12px;display:block}
.cb-box b{font-size:19px}
.cb-box.hi{background:var(--brand-l)}.cb-box.hi b{color:var(--brand-d)}
.aff{display:flex;gap:8px;background:var(--bg);border:1px dashed var(--line);border-radius:10px;padding:8px 8px 8px 12px;align-items:center}
.aff code{flex:1;font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--muted)}
.res-actions{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}

/* sections */
section.pad{padding:52px 0}
h2.t{font-size:28px;font-weight:800;letter-spacing:-.3px}
p.ts{color:var(--muted);margin-top:6px}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:28px}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:20px}
.step .n{width:34px;height:34px;border-radius:10px;background:var(--brand-l);color:var(--brand-d);font-weight:800;display:grid;place-items:center;margin-bottom:12px}
.step h4{font-size:16px;margin-bottom:4px}
.step p{font-size:14px;color:var(--muted)}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:-34px;position:relative;z-index:3}
.stat{background:#fff;border-radius:var(--r);padding:18px 20px;box-shadow:0 6px 24px rgba(0,0,0,.06)}
.stat b{font-size:24px;color:var(--brand-d)}
.stat span{display:block;color:var(--muted);font-size:14px}
.cats{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:12px;margin-top:24px}
.cat{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;display:flex;align-items:center;gap:10px}
.cat .e{font-size:24px}
.cat b{display:block;font-size:14px}
.cat small{color:var(--brand-d);font-weight:700}

/* app pages */
.page{display:none}.page.on{display:block}
.ph{padding:30px 0 10px}
.grid2{display:grid;grid-template-columns:1.3fr 1fr;gap:18px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:20px}
.card h3{font-size:17px;margin-bottom:12px}
.wallet-hero{background:linear-gradient(135deg,#0f9d6b,#086345);color:#fff;border:none}
.wallet-hero .big{font-size:36px;font-weight:800;margin:4px 0 2px}
.wallet-hero small{opacity:.85}
.wrow{display:flex;gap:22px;margin-top:16px;padding-top:16px;border-top:1px solid rgba(255,255,255,.2)}
.wrow b{display:block;font-size:17px}
table{width:100%;border-collapse:collapse;font-size:14px}
th{text-align:left;color:var(--muted);font-weight:500;padding:10px 8px;border-bottom:1px solid var(--line);white-space:nowrap}
td{padding:12px 8px;border-bottom:1px solid var(--line);vertical-align:middle}
tr:last-child td{border-bottom:none}
.tbl-wrap{overflow-x:auto}
.badge{display:inline-block;padding:3px 9px;border-radius:99px;font-size:12px;font-weight:600;white-space:nowrap}
.b-pend{background:#fff4dc;color:#a06c00}
.b-ok{background:var(--brand-l);color:var(--brand-d)}
.b-cxl{background:#fdeaea;color:var(--danger)}
.b-paid{background:#e8efff;color:#3459c7}
.tabs{display:flex;gap:6px;margin-bottom:14px;flex-wrap:wrap}
.tab{padding:7px 14px;border-radius:99px;border:1px solid var(--line);background:#fff;cursor:pointer;font-size:14px;font-weight:500}
.tab.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.empty{text-align:center;padding:36px 10px;color:var(--muted)}
.empty .e{font-size:40px;margin-bottom:6px}
label.f{display:block;font-size:13px;font-weight:600;margin:12px 0 6px}
.inp{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:10px;outline:none;background:#fff}
.inp:focus{border-color:var(--brand)}
.methods{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.method{border:1.5px solid var(--line);border-radius:10px;padding:10px;text-align:center;cursor:pointer;font-size:13px;font-weight:600;background:#fff}
.method .e{font-size:20px;display:block}
.method.on{border-color:var(--brand);background:var(--brand-l);color:var(--brand-d)}
.ref-code{display:flex;align-items:center;justify-content:space-between;background:var(--bg);border:1px dashed var(--brand);border-radius:12px;padding:14px 16px;margin:14px 0}
.ref-code b{font-size:22px;letter-spacing:2px;color:var(--brand-d)}
.tiers{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:10px}
.tier{border:1px solid var(--line);border-radius:12px;padding:12px;text-align:center}
.tier b{display:block;font-size:20px;color:var(--brand-d)}
.tier small{color:var(--muted)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{width:100%;text-align:left;background:none;border:none;padding:16px 0;font-weight:600;font-size:16px;cursor:pointer;display:flex;justify-content:space-between;gap:10px}
.faq-q:after{content:"+";font-size:22px;color:var(--brand);line-height:1}
.faq-item.open .faq-q:after{content:"−"}
.faq-a{display:none;padding:0 0 16px;color:var(--muted)}
.faq-item.open .faq-a{display:block}
.note{background:#fff8ec;border:1px solid #f5dfb0;border-radius:12px;padding:12px 14px;font-size:13.5px;color:#7a5a12;margin-top:14px}

/* modal / toast */
.ov{position:fixed;inset:0;background:rgba(10,20,15,.5);display:none;align-items:center;justify-content:center;z-index:50;padding:16px}
.ov.show{display:flex}
.modal{background:#fff;border-radius:18px;padding:26px;width:100%;max-width:400px;animation:pop .2s ease}
.modal h3{font-size:20px;margin-bottom:4px}
.modal p{color:var(--muted);font-size:14px}
.modal .row{display:flex;gap:8px;margin-top:18px}
.modal .row .btn{flex:1}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(20px);background:var(--ink);color:#fff;padding:12px 18px;border-radius:12px;font-size:14px;opacity:0;transition:.25s;z-index:60;pointer-events:none;max-width:90vw}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
footer{background:#0f1a16;color:#a8b8b1;padding:36px 0;margin-top:40px;font-size:14px}
footer .fg{display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px}
footer b{color:#fff;display:block;margin-bottom:8px}
footer a{color:#a8b8b1;text-decoration:none;display:block;padding:2px 0;cursor:pointer}
footer a:hover{color:#fff}

@media(max-width:820px){
  .links{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;padding:10px 18px;border-bottom:1px solid var(--line);margin:0}
  .links.open{display:flex}
  .menu-btn{display:block}
  .hero h1{font-size:30px}
  .steps{grid-template-columns:1fr 1fr}
  .stats,.grid2{grid-template-columns:1fr}
  .cb-row{grid-template-columns:1fr 1fr}
  .cb-row .cb-box:last-child{grid-column:span 2}
  footer .fg{grid-template-columns:1fr}
  .bal-chip span.lbl{display:none}
}
@media(max-width:480px){
  .paste{flex-direction:column}
  .steps{grid-template-columns:1fr}
  .methods,.tiers{grid-template-columns:1fr 1fr 1fr}
}

/* --- bổ sung cho bản nối API --- */
.thumb img{width:100%;height:100%;object-fit:cover;border-radius:12px}
.banner{background:#fff4dc;color:#7a5a12;text-align:center;font-size:13px;padding:7px 12px;display:none}
.banner.show{display:block}
.err{color:var(--danger);font-size:13px;margin-top:8px;min-height:18px}
.loading{display:flex;align-items:center;gap:10px;color:var(--muted)}
.spinner{width:18px;height:18px;border:2.5px solid var(--line);border-top-color:var(--brand);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.more{display:block;margin:14px auto 0}
.cell-prod{display:flex;align-items:center;gap:10px;min-width:220px}
.cell-prod img,.cell-prod .ph-img{width:40px;height:40px;border-radius:8px;object-fit:cover;background:var(--bg);display:grid;place-items:center;flex-shrink:0}
.muted{color:var(--muted);font-size:13px}
.values{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:-34px;position:relative;z-index:3}
@media(max-width:820px){.values{grid-template-columns:1fr}}
@media(max-width:820px){.hero h1 br{display:none}}
.site-info{margin-top:22px;padding-top:16px;border-top:1px solid rgba(255,255,255,.1);font-size:13px;line-height:1.7}
.legal{max-width:820px;margin:0 auto;padding:30px 18px 50px}
.legal h1{font-size:28px;margin-bottom:6px}
.legal h2{font-size:18px;margin:26px 0 8px}
.legal p,.legal li{color:#2a3a33;margin-bottom:8px}
.legal ul{padding-left:22px}
.logo svg{flex-shrink:0;display:block}