:root{
  --brand:#0B8F63;--brand-2:#12B981;--brand-ink:#fff;--accent:#F59E0B;
  --bg:#F4F7F5;--surface:#fff;--ink:#0F1F1A;--muted:#5B6B65;--line:#DFE7E3;--soft:#EAF4EF;
  --danger:#D93F3F;--warn:#B7791F;--ok:#0B8F63;--info:#2563EB;
  --bk:#E2136E;--ng:#F26522;--rk:#8C3494;
  --r:14px;--shadow:0 1px 2px rgba(15,31,26,.06),0 8px 24px rgba(15,31,26,.06);
}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){
  --bg:#0A1512;--surface:#111F1B;--ink:#E8F2EE;--muted:#91A39B;--line:#1F322C;--soft:#142924;--shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.3);}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.55 "Hind Siliguri",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.25;margin:0 0 .5em}h1{font-size:1.9rem}h2{font-size:1.35rem}h3{font-size:1.1rem}
p{margin:0 0 1em}
code,pre,.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.wrap{max-width:1120px;margin:0 auto;padding:0 16px}
.muted{color:var(--muted)}.small{font-size:.875rem}.center{text-align:center}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}.grow{flex:1}.between{justify-content:space-between}
.grid{display:grid;gap:16px}.g2{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}.g3{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.g4{grid-template-columns:repeat(auto-fit,minmax(170px,1fr))}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px;box-shadow:var(--shadow)}
.card.flat{box-shadow:none}
.stat .n{font-size:1.7rem;font-weight:700;letter-spacing:-.02em}.stat .l{color:var(--muted);font-size:.85rem}
.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;background:var(--brand);color:var(--brand-ink);text-decoration:none;min-height:44px}
.btn:hover{filter:brightness(1.06);text-decoration:none}.btn:active{transform:translateY(1px)}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line)}.btn.ghost:hover{background:var(--soft)}
.btn.danger{background:var(--danger)}.btn.sm{padding:6px 12px;min-height:34px;font-size:.875rem}.btn.block{width:100%}
.btn:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,a:focus-visible{outline:3px solid color-mix(in srgb,var(--brand) 45%,transparent);outline-offset:2px}
label{display:block;font-weight:600;font-size:.9rem;margin:0 0 6px}
input[type=text],input[type=email],input[type=password],input[type=number],input[type=url],input[type=search],select,textarea{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink);font:inherit;min-height:44px}
textarea{min-height:90px;resize:vertical}
.field{margin-bottom:14px}.hint{color:var(--muted);font-size:.82rem;margin-top:4px}
.alert{padding:12px 14px;border-radius:10px;margin-bottom:16px;border:1px solid;font-size:.95rem}
.alert.ok{background:color-mix(in srgb,var(--ok) 10%,var(--surface));border-color:color-mix(in srgb,var(--ok) 35%,var(--line))}
.alert.err{background:color-mix(in srgb,var(--danger) 10%,var(--surface));border-color:color-mix(in srgb,var(--danger) 35%,var(--line))}
.alert.info{background:color-mix(in srgb,var(--info) 9%,var(--surface));border-color:color-mix(in srgb,var(--info) 30%,var(--line))}
.badge{display:inline-block;padding:2px 10px;border-radius:99px;font-size:.78rem;font-weight:700;background:var(--soft);color:var(--muted)}
.badge.paid,.badge.active{background:color-mix(in srgb,var(--ok) 14%,transparent);color:var(--ok)}
.badge.pending{background:color-mix(in srgb,var(--accent) 18%,transparent);color:var(--warn)}
.badge.expired,.badge.cancelled,.badge.suspended,.badge.failed{background:color-mix(in srgb,var(--danger) 13%,transparent);color:var(--danger)}
.badge.ok{background:color-mix(in srgb,var(--ok) 14%,transparent);color:var(--ok)}
table{width:100%;border-collapse:collapse;font-size:.92rem}
th{text-align:left;color:var(--muted);font-weight:600;font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;padding:8px 10px;border-bottom:1px solid var(--line);white-space:nowrap}
td{padding:11px 10px;border-bottom:1px solid var(--line);vertical-align:middle}
tr:last-child td{border-bottom:0}
.tw{overflow-x:auto;-webkit-overflow-scrolling:touch}
.kv{display:grid;grid-template-columns:140px 1fr;gap:8px 14px;font-size:.92rem}.kv dt{color:var(--muted)}.kv dd{margin:0;word-break:break-word}
pre{background:#0D1B17;color:#D7F5E8;padding:16px;border-radius:12px;overflow:auto;font-size:.83rem;line-height:1.6;margin:0 0 1em}
:not(pre)>code{background:var(--soft);padding:1px 6px;border-radius:6px;font-size:.88em}
.copybox{display:flex;gap:8px}.copybox input{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.85rem}

/* top nav + app shell */
.top{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.top .wrap{display:flex;align-items:center;gap:16px;height:60px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.15rem;color:var(--ink)}.logo:hover{text-decoration:none}
.logo i{width:32px;height:32px;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--brand-2));display:grid;place-items:center;color:#fff;font-style:normal;font-size:1.05rem}
.nav{display:flex;gap:4px;overflow-x:auto;flex:1;scrollbar-width:none}.nav::-webkit-scrollbar{display:none}
.nav a{padding:8px 13px;border-radius:9px;color:var(--muted);font-weight:600;white-space:nowrap;font-size:.95rem}
.nav a:hover{background:var(--soft);text-decoration:none;color:var(--ink)}.nav a.on{background:var(--soft);color:var(--brand)}
main.wrap{padding-top:26px;padding-bottom:60px}
.page-h{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:18px}.page-h h1{margin:0;font-size:1.5rem}
.bars{display:flex;align-items:flex-end;gap:8px;height:120px}.bars div{flex:1;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;gap:6px;height:100%}
.bars span{display:block;width:100%;max-width:46px;border-radius:6px 6px 2px 2px;background:linear-gradient(180deg,var(--brand-2),var(--brand));min-height:3px}.bars small{color:var(--muted);font-size:.72rem}
.tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:16px}.tabs a{padding:7px 14px;border:1px solid var(--line);border-radius:99px;color:var(--muted);font-weight:600;font-size:.9rem}.tabs a.on{background:var(--brand);color:#fff;border-color:var(--brand);text-decoration:none}

/* landing */
.hero{padding:72px 0 56px;background:radial-gradient(1200px 400px at 80% -10%,color-mix(in srgb,var(--brand-2) 22%,transparent),transparent),var(--bg)}
.hero h1{font-size:clamp(2rem,5vw,3.2rem);letter-spacing:-.03em;max-width:760px}.hero p.lead{font-size:1.2rem;color:var(--muted);max-width:620px}
.feat{display:flex;gap:14px}.feat b{display:grid;place-items:center;width:42px;height:42px;border-radius:11px;background:var(--soft);font-size:1.3rem;flex:none}
footer.f{border-top:1px solid var(--line);padding:26px 0;color:var(--muted);font-size:.9rem}

/* auth */
.authbox{max-width:420px;margin:48px auto}

/* checkout */
.co{max-width:460px;margin:0 auto;padding:18px 14px 40px}
.co-top{text-align:center;padding:12px 0 18px}
.co-brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:1.1rem}
.co-card{background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);overflow:hidden}
.co-sum{padding:20px;background:linear-gradient(135deg,var(--brand),#06684A);color:#fff}
.co-sum .amt{font-size:2.2rem;font-weight:700;letter-spacing:-.02em}.co-sum .d{opacity:.85;font-size:.9rem}
.co-body{padding:20px}
.mtabs{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:16px}
.mtab{border:2px solid var(--line);border-radius:12px;padding:10px 6px;background:var(--surface);cursor:pointer;font:inherit;font-weight:700;color:var(--ink);display:flex;flex-direction:column;align-items:center;gap:4px;min-height:64px}
.mtab .dot{width:12px;height:12px;border-radius:50%}
.mtab.on{border-color:var(--mc);background:color-mix(in srgb,var(--mc) 9%,var(--surface))}
.numbox{border-radius:14px;padding:16px;color:#fff;background:var(--mc);margin-bottom:14px}
.numbox .num{font-size:1.55rem;font-weight:700;letter-spacing:.04em;font-family:ui-monospace,Menlo,Consolas,monospace}
.steps{margin:0 0 16px;padding-left:20px;color:var(--muted);font-size:.92rem}.steps li{margin-bottom:4px}.steps b{color:var(--ink)}
.timer{display:inline-block;background:var(--soft);color:var(--muted);border-radius:99px;padding:3px 12px;font-size:.82rem;font-weight:600}
.state{text-align:center;padding:34px 20px}.state .ic{width:72px;height:72px;border-radius:50%;display:grid;place-items:center;margin:0 auto 14px;font-size:2rem;color:#fff}
.spin{width:44px;height:44px;border:4px solid var(--line);border-top-color:var(--brand);border-radius:50%;animation:sp 1s linear infinite;margin:0 auto 14px}
@keyframes sp{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.spin{animation-duration:3s}}
.secure{text-align:center;color:var(--muted);font-size:.8rem;margin-top:16px}
@media (max-width:640px){h1{font-size:1.55rem}.kv{grid-template-columns:1fr}.hero{padding:44px 0 36px}}