:root{--bg:#eef1fb;--surface:#fff;--surface2:#f5f7ff;--ink:#141a33;--mut:#6b7394;--line:#e3e7f5;--p:#5b5bf0;--ok:#13b981;--warn:#f59e0b;--bad:#ef4466;
--grad:linear-gradient(135deg,#5b5bf0 0%,#8a4dff 55%,#c04dff 100%);--sh:0 8px 24px -14px rgba(60,60,160,.35);--r:20px;--glass:rgba(255,255,255,.8);
--font:"Plus Jakarta Sans","Hind Siliguri",system-ui,-apple-system,"Segoe UI","Noto Sans Bengali","Nirmala UI",sans-serif}
@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#0b0e1d;--surface:#151a33;--surface2:#1b2142;--ink:#eef0ff;--mut:#9aa3cc;--line:#262d55;--p:#7b7bff;--sh:0 8px 24px -14px rgba(0,0,0,.8);--glass:rgba(21,26,51,.8);color-scheme:dark}}
:root[data-theme=dark]{--bg:#0b0e1d;--surface:#151a33;--surface2:#1b2142;--ink:#eef0ff;--mut:#9aa3cc;--line:#262d55;--p:#7b7bff;--sh:0 8px 24px -14px rgba(0,0,0,.8);--glass:rgba(21,26,51,.8);color-scheme:dark}
*{box-sizing:border-box;margin:0;-webkit-tap-highlight-color:transparent}
body{background:radial-gradient(900px 500px at 85% -10%,color-mix(in srgb,var(--p) 14%,transparent),transparent 60%),var(--bg);background-attachment:fixed;color:var(--ink);font:15px/1.6 var(--font);min-height:100vh}
button,input,select,textarea{font:inherit;color:inherit}a{color:var(--p);text-decoration:none}
h1{font-size:24px;font-weight:800;letter-spacing:-.02em}h2{font-size:18px;font-weight:800}h3{font-size:15px;font-weight:700}
.mut{color:var(--mut)}.sm{font-size:12.5px}.tiny{font-size:11.5px}.c{text-align:center}.hidden{display:none!important}
.row{display:flex;gap:10px;align-items:center}.row.w{flex-wrap:wrap}.g{flex:1;min-width:0}.col{display:flex;flex-direction:column;gap:12px}.sp{justify-content:space-between}
.mt{margin-top:14px}.mb{margin-bottom:14px}
/* shell */
.shell{display:flex;min-height:100vh}.side{display:none;width:244px;flex:none;position:sticky;top:0;height:100vh;padding:22px 14px;flex-direction:column;gap:4px;border-right:1px solid var(--line);background:color-mix(in srgb,var(--surface) 88%,transparent);backdrop-filter:blur(12px)}
.brand{display:flex;gap:12px;align-items:center;padding:4px 10px 18px;font-weight:800;font-size:17px}.logo{width:38px;height:38px;border-radius:12px;background:var(--grad);display:grid;place-items:center;color:#fff;font-size:20px;box-shadow:0 10px 20px -8px rgba(110,70,240,.7)}
.nav{display:flex;gap:12px;align-items:center;padding:10px 12px;border-radius:14px;color:var(--mut);font-weight:600;cursor:pointer;border:0;background:none;width:100%;text-align:left}
.nav .i{font-size:19px;width:24px;text-align:center}.nav:hover{background:var(--surface2);color:var(--ink)}.nav.on{background:var(--grad);color:#fff;box-shadow:0 10px 20px -10px rgba(110,70,240,.7)}
.main{flex:1;min-width:0;padding:14px max(16px,env(safe-area-inset-right)) 110px max(16px,env(safe-area-inset-left))}.wrap{max-width:1040px;margin:0 auto}
.bottom{position:fixed;inset:auto 0 0 0;z-index:40;display:flex;background:var(--glass);backdrop-filter:blur(14px);border-top:1px solid var(--line);border-radius:22px 22px 0 0;padding:6px 6px calc(6px + env(safe-area-inset-bottom))}
.bottom .nav{flex-direction:column;gap:2px;padding:6px 2px;font-size:10.5px;text-align:center;justify-content:center;align-items:center;border-radius:12px}.bottom .nav.on{background:none;color:var(--p);box-shadow:none}.bottom .nav.on .i{background:var(--grad);color:#fff;border-radius:11px;box-shadow:0 6px 12px -4px rgba(110,70,240,.7)}.bottom .nav .i{width:34px;height:30px;line-height:30px}
@media(min-width:900px){.side{display:flex}.bottom{display:none}.main{padding:30px 38px 60px}}
/* parts */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px;box-shadow:var(--sh)}
a.card,.card.click{display:block;color:inherit;cursor:pointer;transition:transform .15s,box-shadow .15s}a.card:hover,.card.click:hover{transform:translateY(-2px)}
.grid{display:grid;gap:14px}.g2{grid-template-columns:1fr}.g3{grid-template-columns:1fr 1fr}
@media(min-width:760px){.g2{grid-template-columns:1fr 1fr}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}}
.hero{background:var(--grad);color:#fff;border-radius:26px;padding:18px;position:relative;overflow:hidden;box-shadow:0 24px 50px -22px rgba(110,70,240,.65)}
.hero:after{content:"";position:absolute;right:-30px;top:-30px;width:150px;height:150px;border-radius:50%;background:rgba(255,255,255,.14)}.hero:before{content:"";position:absolute;right:50px;bottom:-60px;width:130px;height:130px;border-radius:50%;background:rgba(34,211,238,.28)}.hero>*{position:relative;z-index:1}
.hero .mut{color:rgba(255,255,255,.8)}
.big{font-size:32px;font-weight:800;letter-spacing:-.03em;line-height:1.1}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 16px;border-radius:14px;border:1.5px solid var(--line);background:var(--surface);font-weight:700;cursor:pointer;font-size:14px;transition:.15s}
.btn:hover{border-color:var(--p);color:var(--p)}.btn.p{background:var(--grad);border:0;color:#fff;box-shadow:0 10px 20px -8px rgba(110,70,240,.6)}.btn.p:hover{filter:brightness(1.07);color:#fff}
.btn.o{border-color:var(--p);color:var(--p)}.btn.w{background:#fff;color:#4b3fd6;border:0}.btn.d{color:var(--bad)}.btn.s{padding:6px 11px;font-size:13px;border-radius:11px}.btn.b{width:100%}.btn[disabled]{opacity:.5;pointer-events:none}
.pill{display:inline-block;border-radius:99px;padding:2px 10px;font-size:11.5px;font-weight:700;background:var(--surface2);color:var(--p);border:1px solid var(--line)}
.pill.ok{background:color-mix(in srgb,var(--ok) 15%,transparent);color:var(--ok);border-color:transparent}.pill.bad{background:color-mix(in srgb,var(--bad) 15%,transparent);color:var(--bad);border-color:transparent}.pill.warn{background:color-mix(in srgb,var(--warn) 18%,transparent);color:#b45309;border-color:transparent}
:root[data-theme=dark] .pill.warn{color:var(--warn)}
.bar{height:8px;border-radius:9px;background:var(--line);overflow:hidden}.bar i{display:block;height:100%;border-radius:9px;background:var(--grad);transition:width .4s}
input,select,textarea{width:100%;padding:10px 12px;border-radius:13px;border:1.5px solid var(--line);background:var(--surface);outline:none}input:focus,select:focus,textarea:focus{border-color:var(--p);box-shadow:0 0 0 3px color-mix(in srgb,var(--p) 18%,transparent)}
input[type=checkbox],input[type=radio]{width:auto}textarea{min-height:90px;resize:vertical}
label.f{display:flex;flex-direction:column;gap:4px;font-size:12.5px;font-weight:700;color:var(--mut)}.form{display:grid;gap:12px}
.tabs{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none;margin-bottom:14px}.tabs::-webkit-scrollbar{display:none}.tabs button{border:0;background:none;padding:8px 14px;border-radius:12px;font-weight:700;color:var(--mut);white-space:nowrap;cursor:pointer}.tabs button.on{background:var(--grad);color:#fff}
.opt{display:flex;gap:10px;align-items:center;border:1.5px solid var(--line);background:var(--surface);border-radius:14px;padding:10px 12px;font-weight:600;cursor:pointer;text-align:left;width:100%}
.opt u{text-decoration:none;flex:none;width:26px;height:26px;border-radius:9px;display:grid;place-items:center;background:var(--surface2);font-size:12px;color:var(--mut)}
.opt.sel{border-color:var(--p);background:color-mix(in srgb,var(--p) 10%,transparent)}.opt.sel u{background:var(--grad);color:#fff}
.opt.ok{border-color:var(--ok);background:color-mix(in srgb,var(--ok) 10%,transparent)}.opt.ok u{background:var(--ok);color:#fff}.opt.bad{border-color:var(--bad);background:color-mix(in srgb,var(--bad) 10%,transparent)}.opt.bad u{background:var(--bad);color:#fff}
.src{padding:9px 11px;background:var(--surface2);border-left:3px solid var(--p);border-radius:10px;font-size:13px;color:var(--mut)}
.modal{position:fixed;inset:0;background:rgba(10,12,30,.55);z-index:80;display:grid;place-items:center;padding:16px;backdrop-filter:blur(3px)}.modal .card{width:100%;max-width:520px;max-height:90vh;overflow:auto}
.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:90px;background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:14px;z-index:99;font-weight:600;box-shadow:var(--sh)}
.ring{position:relative;display:grid;place-items:center;flex:none}.ring svg{transform:rotate(-90deg)}.ring b{position:absolute;font-size:15px}
.auth{max-width:420px;margin:7vh auto;padding:0 16px}.lang{display:inline-flex;background:var(--surface2);border-radius:12px;padding:3px}.lang button{border:0;background:none;padding:6px 12px;border-radius:9px;font-weight:700;color:var(--mut);cursor:pointer}.lang button.on{background:var(--surface);color:var(--p);box-shadow:0 1px 3px rgba(0,0,0,.15)}
.choice{display:flex;gap:10px;align-items:center;border:1.5px solid var(--line);border-radius:14px;padding:12px;background:var(--surface);cursor:pointer;font-weight:700}.choice.on{border-color:var(--p);background:color-mix(in srgb,var(--p) 10%,transparent)}
.flip{min-height:200px;display:grid;place-items:center;text-align:center;font-size:18px;font-weight:700;cursor:pointer;padding:24px}
.empty{text-align:center;padding:30px 10px;color:var(--mut)}.empty .e{font-size:38px}
table{width:100%;border-collapse:collapse;font-size:13.5px}td,th{padding:8px 6px;border-bottom:1px solid var(--line);text-align:left}
.qnum{display:flex;gap:6px;flex-wrap:wrap}.qnum button{width:32px;height:32px;border-radius:10px;border:1.5px solid var(--line);background:var(--surface);font-weight:700;font-size:12px;cursor:pointer}.qnum .done{background:color-mix(in srgb,var(--ok) 18%,transparent);border-color:transparent}.qnum .cur{background:var(--grad);color:#fff;border:0}
.timer{font-weight:800;padding:6px 12px;border-radius:99px;background:var(--grad);color:#fff}.timer.low{background:var(--bad)}
.srccols{display:grid;gap:12px}.srccols.two{grid-template-columns:1fr}@media(min-width:760px){.srccols.two{grid-template-columns:minmax(0,1fr) minmax(0,1.2fr)}}
.pgimg{width:100%;height:auto;border-radius:12px;border:1px solid var(--line);background:#fff}textarea.src-edit{width:100%}

/* background tasks tray */
.tray{position:fixed;z-index:60;left:12px;right:12px;bottom:calc(82px + env(safe-area-inset-bottom));max-width:420px;margin:0 auto;background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:0 18px 40px -16px rgba(40,40,120,.55);overflow:hidden}
.tray:empty{display:none}
.tray-h{display:flex;gap:8px;padding:10px 14px;font-weight:800;font-size:13px;cursor:pointer;background:color-mix(in srgb,var(--p) 10%,var(--surface))}
.trow{padding:10px 14px;border-top:1px solid var(--line);display:grid;gap:4px;font-size:13px}
.trow a{color:inherit}.trow .x{border:0;background:none;color:var(--mut);font-size:15px;cursor:pointer}
@media(min-width:900px){.tray{left:auto;right:22px;bottom:22px;width:360px;margin:0}}
.toast.click{cursor:pointer}