:root{
  --g:#1f5c3a; --g2:#2f7d52; --g3:#e7f3ec; --gold:#c9a24a; --gold2:#f6edd3;
  --bg:#f3f6f4; --card:#fff; --tx:#15231b; --mut:#64776c; --line:#e2eae5;
  --danger:#c0392b; --warn:#b7791f; --ok:#1f8a5b; --shadow:0 1px 2px rgba(20,40,30,.06),0 6px 18px rgba(20,40,30,.06);
  --r:16px; --nav:62px;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#0e1612;--card:#16221b;--tx:#e7efe9;--mut:#92a89a;--line:#24342b;--g3:#193126;--gold2:#2b2615;--shadow:0 1px 2px rgba(0,0,0,.4)}
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--tx);font-family:'Hind Siliguri','Noto Sans Bengali','Kalpurush',system-ui,sans-serif;font-size:16px;line-height:1.6;padding-bottom:calc(var(--nav) + 18px + env(safe-area-inset-bottom))}
a{color:var(--g2);text-decoration:none}
h1,h2,h3{line-height:1.3;margin:0}
.ar{font-family:'Amiri','Noto Naskh Arabic',serif;font-size:1.25em;direction:rtl}
button,input,select,textarea{font:inherit;color:inherit}
.wrap{max-width:760px;margin:0 auto;padding:0 14px}

/* হেডার */
.top{position:sticky;top:0;z-index:20;background:linear-gradient(135deg,var(--g),var(--g2));color:#fff;padding:10px 0;padding-top:calc(10px + env(safe-area-inset-top));box-shadow:0 2px 10px rgba(0,0,0,.18)}
.top .wrap{display:flex;align-items:center;gap:10px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:1.15rem}
.brand img{width:36px;height:36px;border-radius:10px;background:#fff2}
.top .sp{flex:1}
.top .btn{background:#ffffff26;color:#fff;border:0}
.avatar{width:36px;height:36px;border-radius:50%;background:var(--gold);color:#3a2d08;display:grid;place-items:center;font-weight:700}

/* বোতাম */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 18px;border-radius:12px;border:1.5px solid var(--line);background:var(--card);cursor:pointer;font-weight:600;transition:transform .08s,opacity .2s}
.btn:active{transform:scale(.97)}
.btn.primary{background:linear-gradient(135deg,var(--g),var(--g2));color:#fff;border:0}
.btn.gold{background:var(--gold);color:#3a2d08;border:0}
.btn.danger{background:var(--danger);color:#fff;border:0}
.btn.ghost{background:transparent}
.btn.sm{padding:6px 12px;font-size:.9rem;border-radius:10px}
.btn.block{display:flex;width:100%}
.btn[disabled]{opacity:.5;pointer-events:none}

/* কার্ড */
.card{background:var(--card);border-radius:var(--r);box-shadow:var(--shadow);padding:16px;margin:12px 0}
.card.flat{box-shadow:none;border:1px solid var(--line)}
.sec{display:flex;align-items:center;justify-content:space-between;margin:22px 0 8px}
.sec h2{font-size:1.15rem;display:flex;align-items:center;gap:8px}
.sec h2:before{content:"";width:5px;height:20px;border-radius:3px;background:var(--gold)}
.muted{color:var(--mut)} .small{font-size:.88rem}
.row{display:flex;gap:10px;align-items:center}.row.wrap2{flex-wrap:wrap}.sp{flex:1}
.center{text-align:center}

/* হিরো */
.hero{background:linear-gradient(135deg,var(--g) 0%,#2f7d52 60%,#3b9467 100%);color:#fff;border-radius:22px;padding:22px 18px;margin-top:14px;position:relative;overflow:hidden}
.hero:after{content:"☪";position:absolute;right:-14px;top:-26px;font-size:150px;opacity:.1}
.hero h1{font-size:1.5rem;margin-bottom:6px}
.hero p{margin:0 0 14px;opacity:.92}
.hero .btn{border:0}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:12px}
.stat{background:var(--card);border-radius:14px;padding:10px;text-align:center;box-shadow:var(--shadow)}
.stat b{display:block;font-size:1.35rem;color:var(--g2)}
.stat span{font-size:.8rem;color:var(--mut)}

/* ক্যাটাগরি গ্রিড */
.search{width:100%;padding:12px 14px;border-radius:14px;border:1.5px solid var(--line);background:var(--card);outline:none}
.search:focus,.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--g2);box-shadow:0 0 0 3px #2f7d5233}
.cats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:10px}
@media(min-width:560px){.cats{grid-template-columns:repeat(4,1fr)}}
.cat{background:var(--card);border-radius:16px;padding:14px 6px 12px;text-align:center;box-shadow:var(--shadow);color:var(--tx);display:block;border-top:3px solid var(--c,var(--g2))}
.cat i{font-style:normal;display:grid;place-items:center;width:46px;height:46px;margin:0 auto 6px;border-radius:14px;font-size:1.5rem;background:color-mix(in srgb,var(--c,#1f8a5b) 14%,transparent)}
.cat b{font-size:.88rem;font-weight:600;line-height:1.3;display:block}
.cat:active{transform:scale(.97)}

/* অনুভূমিক স্ক্রল */
.hs{display:flex;gap:12px;overflow-x:auto;padding:4px 2px 10px;scroll-snap-type:x mandatory;scrollbar-width:none}
.hs::-webkit-scrollbar{display:none}
.hs>*{flex:0 0 78%;max-width:300px;scroll-snap-align:start}

/* আইটেম কার্ড */
.item{display:block;background:var(--card);border-radius:16px;padding:14px;box-shadow:var(--shadow);color:var(--tx);border-left:4px solid var(--gold)}
.item h3{font-size:1rem;margin:6px 0 4px}
.badge{display:inline-block;padding:2px 10px;border-radius:99px;font-size:.78rem;font-weight:600;background:var(--g3);color:var(--g2)}
.badge.gold{background:var(--gold2);color:#8a6a14}
.badge.red{background:#fde8e5;color:var(--danger)}
.badge.gray{background:var(--line);color:var(--mut)}
.price{font-weight:700;color:var(--g2)}
.list>*+*{margin-top:10px}

/* ট্যাব/চিপ */
.chips{display:flex;gap:8px;overflow-x:auto;padding:2px 0 8px;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.chip{flex:0 0 auto;padding:7px 14px;border-radius:99px;border:1.5px solid var(--line);background:var(--card);cursor:pointer;font-weight:600;font-size:.92rem;white-space:nowrap}
.chip.on{background:var(--g);border-color:var(--g);color:#fff}

/* ফর্ম */
.field{margin:12px 0}
.field label{display:block;font-weight:600;margin-bottom:5px;font-size:.95rem}
.field input,.field select,.field textarea{width:100%;padding:11px 13px;border-radius:12px;border:1.5px solid var(--line);background:var(--card);outline:none}
.field textarea{min-height:120px;resize:vertical}
.field .hint{font-size:.82rem;color:var(--mut);margin-top:4px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.check{display:flex;gap:8px;align-items:flex-start;font-size:.92rem;margin:12px 0}
.check input{margin-top:5px;width:18px;height:18px}

/* কুইজ */
.progress{height:8px;background:var(--line);border-radius:99px;overflow:hidden;margin:8px 0 14px}
.progress>i{display:block;height:100%;background:linear-gradient(90deg,var(--gold),var(--g2));transition:width .3s}
.qtext{font-size:1.12rem;font-weight:600;margin:6px 0 14px;unicode-bidi:plaintext}
.opt{display:flex;gap:10px;align-items:center;width:100%;text-align:left;padding:13px 14px;margin-bottom:9px;border-radius:14px;border:1.5px solid var(--line);background:var(--card);cursor:pointer;unicode-bidi:plaintext}
.opt .k{flex:0 0 28px;height:28px;border-radius:50%;display:grid;place-items:center;background:var(--g3);color:var(--g2);font-weight:700;font-size:.85rem}
.opt.sel{border-color:var(--g2);background:var(--g3)}
.opt.right{border-color:var(--ok);background:#e3f5ec}
.opt.wrong{border-color:var(--danger);background:#fde8e5}
@media(prefers-color-scheme:dark){.opt.right{background:#143a28}.opt.wrong{background:#3a1a16}.badge.red{background:#3a1a16}}
.expl{background:var(--gold2);border-radius:12px;padding:10px 12px;font-size:.93rem;margin:6px 0 12px}
.score{font-size:3rem;font-weight:700;color:var(--g2);line-height:1}
.ring{width:130px;height:130px;border-radius:50%;margin:8px auto;display:grid;place-items:center;background:conic-gradient(var(--g2) calc(var(--p)*1%),var(--line) 0)}
.ring>div{width:104px;height:104px;border-radius:50%;background:var(--card);display:grid;place-items:center;font-size:1.7rem;font-weight:700;color:var(--g2)}

/* পরীক্ষা */
.timerbar{position:sticky;top:calc(56px + env(safe-area-inset-top));z-index:15;background:var(--card);border-bottom:2px solid var(--gold);padding:8px 14px;display:flex;justify-content:space-between;font-weight:700;box-shadow:var(--shadow)}
.timerbar .t{color:var(--g2);font-variant-numeric:tabular-nums}.timerbar .t.low{color:var(--danger)}
.qbox{background:var(--card);border-radius:16px;padding:14px;margin:12px 0;box-shadow:var(--shadow)}
.qbox .opt{margin-bottom:7px;padding:10px 12px}
.opt input{display:none}

/* লিডারবোর্ড */
.lb{display:flex;align-items:center;gap:12px;padding:10px 12px;background:var(--card);border-radius:14px;box-shadow:var(--shadow)}
.lb .rk{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;font-weight:700;background:var(--g3);color:var(--g2)}
.lb:nth-child(1) .rk{background:#f7e08a;color:#6b4e00}.lb:nth-child(2) .rk{background:#dfe3e6;color:#444}.lb:nth-child(3) .rk{background:#f0c6a1;color:#6a3a14}
.lb.me{outline:2px solid var(--gold)}
.lb b{display:block}.lb .sc{font-weight:700;color:var(--g2);font-size:1.1rem}

/* পোস্ট */
.post p{margin:0 0 12px;font-size:1.04rem;line-height:1.85}
.post h1{font-size:1.35rem;margin:6px 0 8px}

/* নিচের নেভিগেশন */
.nav{position:fixed;left:0;right:0;bottom:0;z-index:30;background:var(--card);border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);box-shadow:0 -4px 16px rgba(0,0,0,.06)}
.nav .in{max-width:760px;margin:0 auto;display:grid;grid-template-columns:repeat(5,1fr)}
.nav a{display:flex;flex-direction:column;align-items:center;gap:1px;padding:8px 0 6px;font-size:.72rem;color:var(--mut);font-weight:600}
.nav a svg{width:23px;height:23px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.nav a.on{color:var(--g2)}
.nav a.on svg{stroke:var(--g2)}

/* টোস্ট, লোডিং, খালি */
#toasts{position:fixed;left:0;right:0;bottom:calc(var(--nav) + 20px);z-index:99;display:flex;flex-direction:column;align-items:center;gap:8px;pointer-events:none}
.toast{background:#17261e;color:#fff;padding:10px 18px;border-radius:12px;max-width:88%;box-shadow:0 6px 20px rgba(0,0,0,.3);animation:up .25s}
.toast.ok{background:var(--g)} .toast.err{background:var(--danger)}
.toast.out{opacity:0;transition:opacity .3s}
@keyframes up{from{transform:translateY(10px);opacity:0}}
.sk{background:linear-gradient(90deg,var(--line) 25%,var(--card) 50%,var(--line) 75%);background-size:200% 100%;animation:sh 1.2s infinite;border-radius:14px;height:80px;margin:12px 0}
@keyframes sh{to{background-position:-200% 0}}
.empty{text-align:center;color:var(--mut);padding:26px 10px}
.empty b{display:block;font-size:2rem}
.banner{background:var(--gold2);color:#6b5210;padding:8px 14px;font-size:.88rem;text-align:center}
.banner.err{background:#fde8e5;color:var(--danger)}
.pay{border:1.5px dashed var(--gold);border-radius:14px;padding:12px;margin:10px 0;background:var(--gold2)}
.pay .num{font-weight:700;font-size:1.15rem;letter-spacing:.5px;font-variant-numeric:tabular-nums}
.steps{counter-reset:s;padding:0;list-style:none}
.steps li{counter-increment:s;position:relative;padding-left:36px;margin:10px 0}
.steps li:before{content:counter(s);position:absolute;left:0;top:0;width:26px;height:26px;border-radius:50%;background:var(--g);color:#fff;display:grid;place-items:center;font-weight:700;font-size:.85rem}
table.tb{width:100%;border-collapse:collapse;font-size:.9rem}
table.tb td,table.tb th{padding:8px 6px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.footer{text-align:center;color:var(--mut);font-size:.85rem;padding:24px 0 8px}
.footer a{margin:0 6px}
.pill-timer{font-variant-numeric:tabular-nums;font-weight:700;color:var(--g2)}