:root{
  --green:#0E3B2E; --green-2:#15553F; --green-3:#1F7050;
  --saffron:#F49B1F; --saffron-2:#E88A0C;
  --sun:#E5281E;
  --cream:#FBF3E2; --paper:#FFFDF6;
  --ink:#22231F; --ink-soft:#57584F;
  --gold:#E9C46A; --good:#2FA56A; --bad:#D64545; --info:#2C6E8A;
  --line:#E2D6B8; --shadow:0 6px 18px rgba(14,59,46,.14);
  --r:18px;
}
@font-face{font-family:'Noto Sans Bengali';src:url('assets/fonts/noto-sans-bengali-400.woff2') format('woff2');font-weight:400;font-display:swap;}
@font-face{font-family:'Noto Sans Bengali';src:url('assets/fonts/noto-sans-bengali-700.woff2') format('woff2');font-weight:700;font-display:swap;}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent;}
html,body{height:100%;}
body{
  font-family:'Noto Sans Bengali','Segoe UI',system-ui,-apple-system,sans-serif;
  background:var(--cream); color:var(--ink);
  background-image:radial-gradient(circle at 88% -4%, rgba(229,40,30,.16) 0 90px, transparent 91px),
                   radial-gradient(circle at 12% 110%, rgba(14,59,46,.10) 0 130px, transparent 131px);
  background-attachment:fixed;
}
#app{max-width:520px;margin:0 auto;min-height:100vh;padding:0 14px 110px;}
.hidden{display:none!important;}

/* ---------- top bar ---------- */
.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:10px;
  padding:12px 6px;background:rgba(251,243,226,.92);backdrop-filter:blur(6px);
  border-bottom:2px solid var(--line);}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--green);flex:1;min-width:0;}
.brand .ico{width:38px;height:38px;border-radius:12px;flex-shrink:0;}
.brand h1{font-size:19px;line-height:1.05;}
.brand small{display:block;font-size:11px;color:var(--green-3);letter-spacing:.4px;}
.tb-btn{display:grid;place-items:center;width:42px;height:42px;border-radius:14px;border:none;
  background:var(--paper);color:var(--green);font-size:20px;box-shadow:var(--shadow);cursor:pointer;flex-shrink:0;}
.tb-btn:active{transform:scale(.94);}
.tb-btn[data-tb=lang]{font-size:15px;font-weight:700;color:var(--saffron-2);width:54px;}
.chip-child{display:flex;align-items:center;gap:8px;background:var(--paper);border-radius:999px;
  padding:5px 12px 5px 5px;box-shadow:var(--shadow);border:none;cursor:pointer;font-family:inherit;flex-shrink:0;}
.chip-child .av{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:700;font-size:14px;}
.chip-child .nm{font-size:14px;font-weight:700;color:var(--green);max-width:100px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ---------- generic cards & buttons ---------- */
.card{background:var(--paper);border:2px solid var(--line);border-radius:var(--r);
  box-shadow:var(--shadow);padding:16px;margin:12px 0;}
.btn{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;padding:14px 18px;
  border-radius:16px;border:none;font-family:inherit;font-size:16px;font-weight:700;cursor:pointer;
  box-shadow:var(--shadow);}
.btn:active{transform:scale(.97);}
.btn-primary{background:var(--green);color:#fff;}
.btn-sun{background:var(--saffron);color:#fff;}
.btn-paper{background:var(--paper);color:var(--green);border:2px solid var(--green);box-shadow:none;}
.btn-mini{padding:8px 12px;font-size:13px;border-radius:12px;width:auto;box-shadow:none;}
.btn-small{width:auto;padding:10px 16px;font-size:14px;}
.btn-row{display:flex;gap:10px;}
.btn-row .btn{flex:1;}
.btn[disabled]{opacity:.5;pointer-events:none;}
.icon-txt{font-size:20px;line-height:1;}
.sec-title{display:flex;align-items:center;justify-content:space-between;margin:18px 4px 6px;}
.sec-title h2{font-size:17px;color:var(--green);}
h3{color:var(--green-2);}

/* ---------- welcome / who ---------- */
.welcome{text-align:center;padding-top:30px;}
.welcome .hero{width:120px;height:120px;margin:0 auto 18px;border-radius:30px;box-shadow:var(--shadow);}
.welcome h1{font-size:34px;color:var(--green);letter-spacing:.5px;}
.welcome .tag{color:var(--green-3);font-weight:700;margin:4px 0 22px;}
.langp{display:flex;gap:12px;margin:16px 0;}
.langp .btn{font-size:18px;}
.who-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:14px;}
.avatar{width:54px;height:54px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:800;font-size:22px;
  border:3px solid var(--paper);box-shadow:var(--shadow);flex-shrink:0;}
.p-card{background:var(--paper);border:2px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);
  padding:12px;display:flex;flex-direction:column;align-items:center;gap:8px;cursor:pointer;font-family:inherit;}
.p-card .nm{font-size:15px;font-weight:700;color:var(--green);}
.p-card small{color:var(--ink-soft);font-size:11px;}
.new-p{display:flex;flex-direction:column;align-items:center;gap:8px;cursor:pointer;
  background:transparent;border:3px dashed var(--green-3);border-radius:var(--r);padding:12px;color:var(--green);font-weight:700;font-family:inherit;}
.stars{letter-spacing:2px;color:var(--gold);font-size:16px;}

/* ---------- home ---------- */
.home-hero{display:flex;align-items:center;gap:14px;background:var(--green);color:#fff;
  border-radius:var(--r);padding:16px;margin-top:14px;box-shadow:var(--shadow);
  background-image:radial-gradient(circle at 90% 0%, rgba(244,155,31,.35) 0 80px, transparent 81px),
                   radial-gradient(circle at 8% 120%, rgba(229,40,30,.30) 0 60px, transparent 61px);}
.home-hero .av{width:56px;height:56px;font-size:26px;}
.home-hero .greet{font-size:20px;font-weight:800;}
.home-hero .sub{font-size:13px;opacity:.92;}
.home-hero .streak{margin-left:auto;text-align:center;background:rgba(255,255,255,.14);border-radius:14px;padding:8px 10px;}
.home-hero .streak b{font-size:22px;color:var(--gold);display:block;}
.home-hero .streak small{font-size:10px;letter-spacing:1px;opacity:.92;}
.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:14px;}
.mode-card{display:block;text-align:left;background:var(--paper);border:2px solid var(--line);
  border-radius:var(--r);padding:14px;box-shadow:var(--shadow);cursor:pointer;font-family:inherit;}
.mode-card .em{font-size:30px;line-height:1;}
.mode-card .tt{font-weight:800;font-size:15px;color:var(--green);margin-top:8px;}
.mode-card .ds{font-size:12px;color:var(--ink-soft);margin-top:2px;line-height:1.4;}
.mode-card.pin{grid-column:1 / -1;background:var(--green);color:#fff;border-color:var(--green);}
.mode-card.pin .tt{color:#fff;}
.mode-card.pin .ds{color:rgba(255,255,255,.85);}

/* ---------- explore / library ---------- */
.tabs{display:flex;background:var(--paper);border-radius:16px;border:2px solid var(--line);
  padding:4px;gap:4px;margin:12px 0;}
.tab{flex:1;padding:10px;border:none;border-radius:12px;background:transparent;font-family:inherit;
  font-weight:700;font-size:15px;color:var(--ink-soft);cursor:pointer;}
.tab.on{background:var(--green);color:#fff;}
.search{width:100%;padding:12px 14px;border-radius:14px;border:2px solid var(--line);
  font-family:inherit;font-size:15px;background:var(--paper);margin-bottom:10px;}
.filter-row{display:flex;gap:6px;flex-wrap:wrap;margin:8px 0 4px;}
.fchip{padding:7px 13px;border-radius:999px;border:2px solid var(--line);background:var(--paper);
  font-family:inherit;font-size:13px;font-weight:700;color:var(--ink-soft);cursor:pointer;}
.fchip.on{background:var(--green);color:#fff;border-color:var(--green);}
.item{display:flex;align-items:center;gap:12px;width:100%;text-align:left;background:var(--paper);
  border:2px solid var(--line);border-radius:14px;padding:10px 12px;margin:8px 0;box-shadow:var(--shadow);
  cursor:pointer;font-family:inherit;}
.item .flag{width:42px;height:30px;object-fit:cover;border-radius:4px;box-shadow:0 0 0 1px rgba(0,0,0,.08);}
.item .ring{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;font-size:20px;color:#fff;font-weight:800;flex-shrink:0;}
.item .tx{flex:1;min-width:0;}
.item .nm{font-size:15px;font-weight:700;color:var(--green);}
.item .sb{font-size:12px;color:var(--ink-soft);}
.item .st{font-size:14px;color:var(--gold);}
.item .favbtn{font-size:18px;color:var(--saffron);cursor:pointer;padding:2px 4px;flex-shrink:0;}
.item .favbtn:hover{transform:scale(1.15);}
.btn.fav-on{background:var(--saffron);color:#fff;border-color:var(--saffron);}
.official-txt{font-size:12px;color:var(--ink-soft);margin-top:2px;}
.native-txt{font-size:14px;color:var(--green-3);margin:4px 0 0;font-weight:700;}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin:6px 0 4px;}
.chip{display:inline-flex;align-items:center;gap:6px;background:var(--cream);border:1px solid var(--line);
  border-radius:999px;padding:4px 10px;font-size:12px;font-weight:600;color:var(--green);}
.chip-flag{width:20px;height:14px;object-fit:cover;border-radius:2px;}
.wrong-list .qw{font-size:13px;color:var(--ink-soft);}
.wrong-list .qa{font-size:14px;font-weight:700;color:var(--green);}

/* ---------- detail ---------- */
.detail-photo{width:100%;border-radius:14px;object-fit:cover;display:block;margin-bottom:14px;
  max-height:240px;border:2px solid var(--line);}
.photo-ph{width:100%;height:150px;border-radius:14px;display:grid;place-items:center;background:var(--cream);
  color:var(--green-3);font-weight:700;border:2px dashed var(--line);margin-bottom:14px;}
.stat-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:12px 0;}
.stat{background:var(--cream);border-radius:14px;padding:10px 12px;}
.stat b{display:block;font-size:17px;color:var(--green);}
.stat small{font-size:11px;color:var(--ink-soft);}
.factbox{background:var(--cream);border-left:5px solid var(--saffron);border-radius:10px;padding:12px;margin:10px 0;line-height:1.55;}
.rivers li{list-style:none;margin:4px 0;padding-left:20px;position:relative;}
.rivers li:before{content:'~';position:absolute;left:2px;color:var(--info);font-weight:700;}
.attr{font-size:11px;color:var(--ink-soft);margin-top:10px;line-height:1.5;}
.attr a{color:var(--info);}

/* ---------- map ---------- */
.map-wrap{position:relative;background:var(--paper);border:2px solid var(--line);border-radius:var(--r);
  box-shadow:var(--shadow);overflow:hidden;margin:12px 0;}
.map-canvas{display:block;width:100%;height:auto;touch-action:manipulation;cursor:pointer;}
.map-hint{position:absolute;left:10px;bottom:10px;background:rgba(14,59,46,.85);color:#fff;
  font-size:12px;padding:6px 10px;border-radius:999px;max-width:70%;pointer-events:none;}
.map-legend{display:flex;gap:12px;flex-wrap:wrap;margin:8px 2px;font-size:12px;color:var(--ink-soft);}
.map-legend .sw{width:14px;height:14px;border-radius:4px;display:inline-block;vertical-align:-2px;margin-right:4px;}

/* ---------- quiz ---------- */
.q-top{display:flex;align-items:center;gap:10px;padding:10px 2px;}
.q-flag{width:100%;max-height:150px;object-fit:contain;margin:6px auto;border-radius:12px;box-shadow:var(--shadow);}
.q-prompt{font-size:19px;font-weight:800;color:var(--green);text-align:center;padding:10px 4px;line-height:1.45;}
.q-progress{height:8px;background:var(--line);border-radius:99px;overflow:hidden;margin:10px 0;}
.q-progress i{display:block;height:100%;background:var(--saffron);border-radius:99px;transition:width .25s;}
.choices{display:flex;flex-direction:column;gap:10px;margin-top:12px;}
.choice{display:flex;align-items:center;gap:12px;background:var(--paper);border:2px solid var(--line);
  border-radius:15px;padding:12px;cursor:pointer;font-family:inherit;text-align:left;box-shadow:var(--shadow);}
.choice .flag{width:52px;height:36px;object-fit:cover;border-radius:5px;box-shadow:0 0 0 1px rgba(0,0,0,.08);}
.choice .nm{font-size:16px;font-weight:700;color:var(--green);flex:1;}
.choice .ltr{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:var(--cream);
  color:var(--green-3);font-weight:800;flex-shrink:0;}
.choice.ok{background:#E7F6EC;border-color:var(--good);}
.choice.bad{background:#FDE9E9;border-color:var(--bad);}
.choice.dis{pointer-events:none;opacity:.75;}
.q-score{margin-left:auto;background:var(--paper);border-radius:999px;padding:4px 12px;font-weight:800;color:var(--green);box-shadow:var(--shadow);font-size:14px;}
.flash-zone{display:grid;place-items:center;min-height:52vh;text-align:center;}
.q-timer{width:100%;text-align:right;font-weight:800;color:var(--sun);font-size:18px;}

/* ---------- results ---------- */
.results{text-align:center;padding-top:20px;}
.results .big{font-size:64px;line-height:1;}
.results .score{font-size:20px;font-weight:800;color:var(--green);margin:8px 0;}
.stars-big{font-size:40px;letter-spacing:8px;color:var(--gold);}
.streak-pill{display:inline-flex;gap:8px;align-items:center;background:var(--paper);border:2px solid var(--line);
  border-radius:999px;padding:8px 16px;font-weight:800;color:var(--green);margin:14px 0;box-shadow:var(--shadow);}

/* ---------- parent ---------- */
.pin-dots{display:flex;justify-content:center;gap:18px;margin:22px 0;}
.pin-dots i{width:20px;height:20px;border-radius:50%;border:3px solid var(--green);}
.pin-dots i.f{background:var(--green);}
.pin-pad{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:8px auto;max-width:280px;}
.pin-key{height:64px;border-radius:18px;border:none;background:var(--paper);box-shadow:var(--shadow);
  font-family:inherit;font-size:26px;font-weight:800;color:var(--green);cursor:pointer;}
.pin-key:active{transform:scale(.95);}
.setting{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:14px 0;border-bottom:1px solid var(--line);}
.setting .tt{font-weight:700;color:var(--green);font-size:15px;}
.setting .ds{font-size:12px;color:var(--ink-soft);}
.switch{width:52px;height:30px;border-radius:99px;background:var(--line);position:relative;border:none;cursor:pointer;flex-shrink:0;}
.switch:after{content:'';position:absolute;top:3px;left:3px;width:24px;height:24px;border-radius:50%;background:#fff;transition:.15s;box-shadow:0 1px 3px rgba(0,0,0,.3);}
.switch.on{background:var(--good);}
.switch.on:after{left:25px;}

/* ---------- modal ---------- */
.modal-bg{position:fixed;inset:0;background:rgba(14,59,46,.55);display:grid;place-items:center;z-index:50;padding:18px;}
.modal{background:var(--paper);border-radius:20px;max-width:480px;width:100%;max-height:84vh;overflow-y:auto;padding:20px;box-shadow:0 12px 40px rgba(0,0,0,.3);}

/* ---------- toast & confetti ---------- */
#toasts{position:fixed;left:50%;top:14px;transform:translateX(-50%);z-index:90;display:flex;flex-direction:column;gap:8px;width:min(92vw,420px);pointer-events:none;}
.toast{background:var(--green);color:#fff;padding:12px 18px;border-radius:14px;font-weight:700;
  box-shadow:var(--shadow);animation:tslide .25s ease, tfade .4s ease 2.4s forwards;text-align:center;}
@keyframes tslide{from{opacity:0;transform:translateY(-14px);}to{opacity:1;transform:none;}}
@keyframes tfade{to{opacity:0;}}
.confetti{position:fixed;top:-16px;width:10px;height:16px;z-index:95;pointer-events:none;animation:cfall linear forwards;}
@keyframes cfall{100%{transform:translateY(110vh) rotate(720deg);}}

@media (min-width:640px){ body{background-size:auto;} }