:root{--bg:#f4f5fb;--surface:#fff;--surface2:#f8f9fe;--text:#0f172a;--muted:#64748b;--border:#e6e9f3;--brand:#6366f1;--brand2:#8b5cf6;--pink:#ec4899;--ok:#16a34a;--bad:#dc2626;--warn:#d97706;
--grad:linear-gradient(135deg,#6366f1 0%,#8b5cf6 55%,#ec4899 100%);--shadow:0 10px 30px -12px rgba(79,70,229,.25);--r:16px}
[data-theme=dark]{--bg:#0a0f1f;--surface:#121a30;--surface2:#0e1528;--text:#e8ecf8;--muted:#8d98b5;--border:#212b47;--shadow:0 10px 30px -12px rgba(0,0,0,.6)}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans Bengali",sans-serif;background:var(--bg);color:var(--text);line-height:1.5}
a{color:var(--brand);text-decoration:none}.muted{color:var(--muted);font-size:14px}code{background:var(--surface2);border:1px solid var(--border);padding:2px 6px;border-radius:6px;font-size:13px}
.ic{vertical-align:-3px;flex:none}
/* layout */
.sidebar{position:fixed;inset:0 auto 0 0;width:258px;background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:18px 14px;z-index:30;transition:transform .25s}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;padding:6px 8px 18px}
.logo i{width:36px;height:36px;border-radius:11px;background:var(--grad);display:grid;place-items:center;color:#fff;font-style:normal;box-shadow:var(--shadow)}
.nav{display:flex;flex-direction:column;gap:3px;overflow:auto;flex:1}
.nav a{display:flex;align-items:center;gap:11px;padding:11px 12px;border-radius:12px;color:var(--muted);font-weight:600;font-size:14.5px;transition:.15s}
.nav a:hover{background:var(--surface2);color:var(--text)}
.nav a.on{background:var(--grad);color:#fff;box-shadow:var(--shadow)}
.nav .sep{font-size:11px;letter-spacing:.08em;color:var(--muted);padding:14px 12px 4px;text-transform:uppercase}
.side-foot{border-top:1px solid var(--border);padding-top:12px}
.main{margin-left:258px;min-height:100vh}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:14px 26px;background:color-mix(in srgb,var(--bg) 85%,transparent);backdrop-filter:blur(10px);position:sticky;top:0;z-index:20;border-bottom:1px solid var(--border)}
.topbar h1{font-size:19px;margin:0}.tb-right{display:flex;align-items:center;gap:10px}
.chip{display:inline-flex;align-items:center;gap:7px;background:var(--surface);border:1px solid var(--border);padding:7px 13px;border-radius:99px;font-weight:700;font-size:14px}
.chip.bal{background:var(--grad);color:#fff;border:0}
.iconbtn{background:var(--surface);border:1px solid var(--border);color:var(--text);width:38px;height:38px;border-radius:12px;display:grid;place-items:center;cursor:pointer}
.burger{display:none}
.wrap{padding:24px 26px;max-width:1180px}
@media(max-width:900px){.sidebar{transform:translateX(-100%)}.sidebar.open{transform:none;box-shadow:0 0 0 100vmax rgba(0,0,0,.45)}.main{margin-left:0}.burger{display:grid}.wrap{padding:16px 14px}.topbar{padding:12px 14px}}
/* cards */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:16px;margin-bottom:18px}
.grid2{display:grid;grid-template-columns:2fr 1fr;gap:18px}@media(max-width:900px){.grid2{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:20px;margin-bottom:18px;box-shadow:0 1px 2px rgba(0,0,0,.03)}
.card h3{margin:0 0 12px;font-size:16.5px}
.stat{display:flex;gap:14px;align-items:center;margin:0}
.stat .bub{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;color:#fff;background:var(--grad);box-shadow:var(--shadow)}
.stat .bub.g{background:linear-gradient(135deg,#10b981,#059669)}.stat .bub.r{background:linear-gradient(135deg,#f43f5e,#e11d48)}.stat .bub.o{background:linear-gradient(135deg,#f59e0b,#ea580c)}.stat .bub.b{background:linear-gradient(135deg,#0ea5e9,#2563eb)}
.stat b{display:block;font-size:24px;line-height:1.1}.stat span{color:var(--muted);font-size:13px}
/* forms */
label{display:block;font-weight:600;margin:14px 0 6px;font-size:13.5px}
input,select,textarea{width:100%;padding:11px 13px;border:1px solid var(--border);border-radius:12px;font:inherit;background:var(--surface2);color:var(--text);transition:.15s}
textarea{min-height:120px;resize:vertical}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px color-mix(in srgb,var(--brand) 18%,transparent);background:var(--surface)}
input[type=checkbox],input[type=radio]{width:auto}
.row{display:grid;grid-template-columns:1fr 1fr;gap:14px}@media(max-width:700px){.row{grid-template-columns:1fr}}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;margin-top:16px;background:var(--grad);color:#fff;border:0;padding:12px 22px;border-radius:12px;font:inherit;font-weight:700;cursor:pointer;box-shadow:var(--shadow);transition:.15s}
.btn:hover{transform:translateY(-1px);filter:brightness(1.06)}.btn.block{width:100%}
.btn.sm{padding:7px 13px;margin:0;font-size:13px;box-shadow:none}.btn.red{background:linear-gradient(135deg,#f43f5e,#e11d48)}.btn.green{background:linear-gradient(135deg,#10b981,#059669)}
.btn.ghost{background:var(--surface2);color:var(--text);border:1px solid var(--border);box-shadow:none}
.alert{padding:12px 15px;border-radius:12px;margin-bottom:16px;font-size:14px;border:1px solid transparent}.alert.ok{background:#dcfce7;color:#14532d;border-color:#bbf7d0}.alert.err{background:#fee2e2;color:#7f1d1d;border-color:#fecaca}.alert.info{background:#e0e7ff;color:#312e81;border-color:#c7d2fe}
[data-theme=dark] .alert.ok{background:#052e1a;color:#86efac;border-color:#14532d}[data-theme=dark] .alert.err{background:#2e0a0a;color:#fca5a5;border-color:#7f1d1d}[data-theme=dark] .alert.info{background:#1b1f45;color:#c7d2fe;border-color:#312e81}
/* tables */
.tw{overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:14px}
th,td{text-align:left;padding:11px 10px;border-bottom:1px solid var(--border);vertical-align:middle}th{color:var(--muted);font-weight:600;font-size:12.5px;text-transform:uppercase;letter-spacing:.03em}
tr:hover td{background:var(--surface2)}
.badge{padding:3px 10px;border-radius:99px;font-size:12px;font-weight:700;white-space:nowrap}
.b-sent,.b-approved,.b-active,.b-done{background:#dcfce7;color:#166534}.b-failed,.b-rejected,.b-blocked,.b-cancelled{background:#fee2e2;color:#991b1b}.b-pending,.b-queued{background:#fef3c7;color:#92400e}.b-processing,.b-scheduled{background:#e0e7ff;color:#3730a3}
.progress{height:8px;background:var(--border);border-radius:99px;overflow:hidden;min-width:90px}.progress i{display:block;height:100%;background:var(--grad)}
.pager{display:flex;gap:6px;margin-top:14px}.pager a{padding:6px 12px;border:1px solid var(--border);border-radius:9px;color:var(--text)}.pager a.on{background:var(--grad);color:#fff;border-color:transparent}
/* tabs */
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:6px}
.tab{padding:10px 16px;border-radius:12px;background:var(--surface2);border:1px solid var(--border);font-weight:700;font-size:14px;cursor:pointer;color:var(--muted);display:inline-flex;gap:8px;align-items:center}
.tab.on{background:var(--grad);color:#fff;border-color:transparent;box-shadow:var(--shadow)}
.pane{display:none}.pane.on{display:block}
.counter{font-size:13px;color:var(--muted);margin-top:6px;display:flex;gap:14px;flex-wrap:wrap}.counter b{color:var(--text)}
.groups{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:8px}
.gchk{display:flex;gap:9px;align-items:center;padding:10px 12px;border:1px solid var(--border);border-radius:12px;background:var(--surface2);font-weight:600;font-size:14px;margin:0;cursor:pointer}
/* phone preview */
.phone{width:100%;max-width:290px;margin:0 auto;border:8px solid #1e293b;border-radius:34px;background:var(--surface2);padding:14px 12px 18px;min-height:380px;box-shadow:var(--shadow)}
.phone .hd{text-align:center;font-weight:800;font-size:14px;padding-bottom:10px;border-bottom:1px solid var(--border);margin-bottom:12px}
.bubble{background:var(--surface);border:1px solid var(--border);padding:10px 13px;border-radius:16px 16px 16px 4px;font-size:14px;white-space:pre-wrap;word-break:break-word;min-height:44px}
.phone small{display:block;margin-top:8px;color:var(--muted);text-align:center}
/* chart */
.chart{display:flex;align-items:flex-end;gap:12px;height:160px;padding-top:10px}
.chart .col{flex:1;display:flex;flex-direction:column;align-items:center;gap:6px;height:100%;justify-content:flex-end}
.chart .bars{display:flex;gap:3px;align-items:flex-end;height:100%;width:100%;justify-content:center}
.chart .bars i{width:42%;max-width:22px;border-radius:6px 6px 0 0;background:var(--grad);min-height:2px}.chart .bars i.f{background:linear-gradient(180deg,#f43f5e,#e11d48)}
.chart small{font-size:11px;color:var(--muted)}
.notice{border-left:4px solid var(--brand);background:var(--surface2);padding:12px 14px;border-radius:0 12px 12px 0;margin-bottom:10px}
pre.code{background:#0b1020;color:#c7d2fe;padding:14px;border-radius:12px;overflow:auto;font-size:13px}
.qa{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px}
.qa a{display:flex;gap:10px;align-items:center;padding:14px;border-radius:14px;background:var(--surface2);border:1px solid var(--border);color:var(--text);font-weight:700}
.qa a:hover{border-color:var(--brand)}
/* auth + landing */
body.auth{display:flex;min-height:100vh;align-items:center;justify-content:center;padding:16px;position:relative;overflow:hidden}
.auth-bg{position:absolute;inset:0;background:radial-gradient(600px 400px at 15% 10%,rgba(99,102,241,.35),transparent),radial-gradient(500px 400px at 90% 90%,rgba(236,72,153,.28),transparent);z-index:0}
.auth-card{width:100%;max-width:420px;position:relative;z-index:1;padding:28px;box-shadow:var(--shadow)}
.auth-card h2{margin:0 0 4px}
.nav-pub{display:flex;align-items:center;justify-content:space-between;padding:16px 6vw;position:absolute;top:0;left:0;right:0;z-index:5}
.hero{position:relative;text-align:center;padding:150px 6vw 90px;overflow:hidden}
.hero:before{content:"";position:absolute;inset:0;background:radial-gradient(700px 420px at 20% 0%,rgba(99,102,241,.35),transparent),radial-gradient(600px 420px at 85% 20%,rgba(236,72,153,.28),transparent);z-index:0}
.hero>*{position:relative;z-index:1}
.hero h1{font-size:clamp(30px,5vw,54px);line-height:1.15;margin:0 0 14px;font-weight:900}
.hero h1 span{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{color:var(--muted);max-width:620px;margin:0 auto 24px;font-size:17px}
.hero .btn{margin:6px}
.sec{padding:60px 6vw;max-width:1200px;margin:0 auto}.sec h2{text-align:center;font-size:30px;margin:0 0 8px}.sec .sub{text-align:center;color:var(--muted);margin-bottom:34px}
.feat{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px}
.feat .card{margin:0;transition:.2s}.feat .card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.feat .bub{width:48px;height:48px;border-radius:14px;background:var(--grad);display:grid;place-items:center;color:#fff;margin-bottom:12px}
.price{max-width:420px;margin:0 auto;text-align:center;background:var(--grad);color:#fff;border-radius:24px;padding:34px;box-shadow:var(--shadow)}
.price b{font-size:52px;display:block}
.foot{text-align:center;padding:30px;color:var(--muted);border-top:1px solid var(--border)}
/* ===== menu button / collapse ===== */
.scrim{display:none;position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:25}
body.collapsed .sidebar{transform:translateX(-100%)}body.collapsed .main{margin-left:0}
.burger{display:grid!important}
@media(max-width:900px){.sidebar.open ~ .scrim{display:block}.sidebar.open{box-shadow:none}}
.ucard{display:flex;gap:11px;align-items:center;padding:12px;border-radius:14px;background:var(--surface2);border:1px solid var(--border);margin-bottom:12px}
.avatar{width:40px;height:40px;border-radius:12px;background:var(--grad);color:#fff;display:grid;place-items:center;font-weight:800;flex:none}
.ucard b{display:block;font-size:14px;line-height:1.2}.ucard span{font-size:12px;color:var(--muted)}
.nb{margin-left:auto;background:var(--bad);color:#fff;border-radius:99px;font-size:11px;padding:1px 8px;font-weight:700}
/* ===== public site ===== */
.pnav{position:fixed;top:0;left:0;right:0;z-index:40;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 5vw;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}
.pnav .logo{padding:0;color:var(--text)}
.plinks{display:flex;align-items:center;gap:4px}
.plinks a.pl{padding:8px 13px;border-radius:10px;color:var(--text);font-weight:600;font-size:14.5px}.plinks a.pl:hover,.plinks a.pl.on{background:var(--surface2);color:var(--brand)}
.pbtns{display:flex;gap:8px;margin-left:10px}.pbtns .btn{margin:0}
.pright{display:flex;gap:8px;align-items:center}.pburger{display:none}
@media(max-width:860px){.pburger{display:grid}.plinks{position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;background:var(--surface);border-bottom:1px solid var(--border);padding:12px 5vw 16px;display:none}.plinks.open{display:flex}.pbtns{margin:8px 0 0}.pbtns .btn{flex:1}}
.hero2{display:grid;grid-template-columns:1.15fr .85fr;gap:34px;align-items:center;padding:130px 5vw 70px;max-width:1250px;margin:0 auto;position:relative}
.hero2:before{content:"";position:absolute;inset:0 -20vw;background:radial-gradient(700px 420px at 15% 0%,rgba(99,102,241,.32),transparent),radial-gradient(600px 420px at 90% 30%,rgba(236,72,153,.25),transparent);z-index:-1}
.hero2 h1{font-size:clamp(30px,4.6vw,52px);line-height:1.15;margin:0 0 14px;font-weight:900}.hero2 h1 span{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero2 p{color:var(--muted);font-size:17px;max-width:560px}.hero2 .btn{margin:8px 8px 0 0}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:22px}.chips span{background:var(--surface);border:1px solid var(--border);padding:6px 12px;border-radius:99px;font-size:13px;font-weight:600}
@media(max-width:860px){.hero2{grid-template-columns:1fr;padding-top:110px;text-align:center}.hero2 p{margin:0 auto}.chips{justify-content:center}}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}.step .n{width:40px;height:40px;border-radius:50%;background:var(--grad);color:#fff;display:grid;place-items:center;font-weight:800;margin-bottom:10px}
details.fq{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:15px 18px;margin-bottom:10px;max-width:800px;margin-left:auto;margin-right:auto}
details.fq summary{cursor:pointer;font-weight:700}details.fq p{color:var(--muted);margin:10px 0 0}
.pkgs{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:16px}
.pkg{background:var(--surface);border:2px solid var(--border);border-radius:20px;padding:26px 20px;text-align:center;position:relative;transition:.2s;cursor:pointer;display:block;margin:0}
.pkg:hover,.pkg.sel{border-color:var(--brand);transform:translateY(-3px);box-shadow:var(--shadow)}
.pkg b.pr{font-size:34px;display:block;margin:6px 0}.pkg .pop{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--grad);color:#fff;font-size:12px;font-weight:700;padding:3px 12px;border-radius:99px}
.pkg input{display:none}.pkg .sms{color:var(--ok);font-weight:700}
.cta{background:var(--grad);color:#fff;border-radius:26px;padding:44px 24px;text-align:center;box-shadow:var(--shadow);max-width:1100px;margin:0 auto}
.cta h2{margin:0 0 8px;color:#fff}.cta .btn{background:#fff;color:#4f46e5}
.pfoot{border-top:1px solid var(--border);padding:40px 5vw 20px;margin-top:50px}
.pf-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:24px;max-width:1200px;margin:0 auto}@media(max-width:700px){.pf-grid{grid-template-columns:1fr 1fr}}
.pfoot a{display:block;color:var(--muted);padding:3px 0;font-size:14px}.pfoot h4{margin:0 0 8px}
.pf-copy{text-align:center;color:var(--muted);font-size:13px;margin-top:26px}
.page{max-width:900px;margin:0 auto;padding:110px 5vw 20px}.page h1{margin:0 0 6px}
.page .card{margin-top:18px}.prose p,.prose li{color:var(--muted)}.prose h3{margin-top:22px}
.amt{font-weight:800}.pos{color:var(--ok)}.neg{color:var(--bad)}
.msgs .m{padding:12px 14px;border-radius:14px;margin-bottom:10px;background:var(--surface2);border:1px solid var(--border)}.msgs .m.a{background:color-mix(in srgb,var(--brand) 10%,var(--surface));border-color:color-mix(in srgb,var(--brand) 35%,var(--border))}
.msgs .m small{color:var(--muted);display:block;margin-bottom:4px}
/* ===== live chat ===== */
.cv{display:flex;flex-direction:column;height:100%;min-height:0;flex:1;background:var(--surface)}
.cv-msgs{flex:1;min-height:0;overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:6px;background:var(--surface2)}
.cv-row{display:flex}.cv-row.me{justify-content:flex-end}
.cv-b{max-width:80%;padding:8px 11px;border-radius:16px;font-size:14.5px;word-break:break-word}
.cv-row.them .cv-b{background:var(--surface);border:1px solid var(--border);border-bottom-left-radius:4px}
.cv-row.me .cv-b{background:var(--grad);color:#fff;border-bottom-right-radius:4px}
.cv-t{white-space:pre-wrap}.cv-b img{max-width:100%;max-height:260px;border-radius:10px;display:block;margin-bottom:4px}
.cv-time{display:block;font-size:10.5px;opacity:.7;margin-top:2px;text-align:right}
.cv-date{align-self:center;font-size:11px;color:var(--muted);background:var(--surface);border:1px solid var(--border);padding:2px 10px;border-radius:99px;margin:6px 0}
.cv-hint{align-self:center;text-align:center;font-size:12.5px;color:var(--muted);padding:6px 12px;max-width:90%}
.cv-empty{padding:40px 16px;text-align:center;color:var(--muted)}
.cv-bar{display:flex;gap:8px;align-items:flex-end;padding:10px;border-top:1px solid var(--border);background:var(--surface)}
.cv-bar textarea{min-height:42px;max-height:110px;height:42px;resize:none;padding:10px 12px;border-radius:14px}
.cv-ic,.cv-send{width:42px;height:42px;border-radius:12px;border:1px solid var(--border);background:var(--surface2);color:var(--text);display:grid;place-items:center;cursor:pointer;flex:none}
.cv-send{background:var(--grad);color:#fff;border:0}
.cv-prev{display:none;gap:10px;align-items:center;padding:8px 12px;border-top:1px solid var(--border);background:var(--surface)}
.cv-prev img{height:56px;border-radius:8px}.cv-x{border:0;background:var(--bad);color:#fff;width:24px;height:24px;border-radius:50%;cursor:pointer}
.cv-quick{display:flex;gap:6px;overflow-x:auto;padding:6px 10px;background:var(--surface);border-top:1px solid var(--border)}.cv-quick:empty{display:none}
.cv-quick button{white-space:nowrap;border:1px solid var(--border);background:var(--surface2);color:var(--text);border-radius:99px;padding:5px 12px;font:inherit;font-size:12.5px;cursor:pointer}
.cv-start{padding:30px 22px;text-align:center}.cv-start h3{margin:0 0 6px;font-size:20px}.cv-start input{margin:10px 0}
.cv-head{padding:12px 16px;border-bottom:1px solid var(--border);font-weight:700;background:var(--surface)}
.cv-host{height:calc(100vh - 230px);min-height:420px}
.chat-fab{position:fixed;right:18px;bottom:18px;z-index:60;width:58px;height:58px;border-radius:50%;background:var(--grad);color:#fff;border:0;display:grid;place-items:center;cursor:pointer;box-shadow:var(--shadow)}
.chat-fab .nb{position:absolute;top:-4px;right:-4px;margin:0}
.chat-pop{position:fixed;right:18px;bottom:88px;z-index:60;width:360px;max-width:calc(100vw - 24px);height:520px;max-height:calc(100vh - 110px);border-radius:20px;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.35);border:1px solid var(--border);display:none;background:var(--surface)}
.chat-pop.open{display:block}.chat-pop iframe{width:100%;height:100%;border:0}
.adm-chat{display:grid;grid-template-columns:320px 1fr;gap:16px;height:calc(100vh - 150px);min-height:480px}
.ac-list{overflow-y:auto;padding:8px;margin:0}.ac-conv{padding:0;margin:0;overflow:hidden;display:flex;flex-direction:column}
.ac-item{display:flex;gap:10px;align-items:center;padding:10px;border-radius:12px;cursor:pointer}.ac-item:hover,.ac-item.on{background:var(--surface2)}
.ac-mid{flex:1;min-width:0}.ac-mid b{display:block;font-size:14px}.ac-mid span{display:block;font-size:12.5px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ac-r{text-align:right}.ac-r small{display:block;color:var(--muted);font-size:11px}.ac-r .nb{margin:3px 0 0;display:inline-block}
.ac-head{display:flex;gap:8px;align-items:center}.ac-host{flex:1;min-height:0;display:flex}.ac-back{display:none}
@media(max-width:800px){.adm-chat{grid-template-columns:1fr}.adm-chat.open .ac-list{display:none}.adm-chat:not(.open) .ac-conv{display:none}.ac-back{display:inline-flex}}
.cv-auto{display:block;font-size:10.5px;opacity:.75;margin-bottom:3px;font-weight:700}