:root{--blue:#2563eb;--blue-dark:#1d4ed8;--blue-light:#eff6ff;--green:#16a34a;--green-dark:#15803d;--green-light:#f0fdf4;--danger:#dc2626;--danger-dark:#b91c1c;--warn:#f59e0b;--ink:#0f172a;--muted:#64748b;--line:#e2e8f0;--bg:#f6f8fb;--card:#ffffff;--surface-2:#f8fafc;--sidebar:#0f172a;--sidebar-ink:#94a3b8;--focus:rgba(37,99,235,0.35);--space-1:0.25rem;--space-2:0.5rem;--space-3:0.75rem;--space-4:1rem;--space-5:1.5rem;--space-6:2rem;--text-xs:0.75rem;--text-sm:0.82rem;--text-base:0.95rem;--text-lg:1.15rem;--text-xl:1.35rem;--text-2xl:2rem;--radius-sm:8px;--radius:12px;--radius-lg:16px;--radius-pill:999px;--shadow-sm:0 1px 2px rgba(15,23,42,0.06);--shadow-md:0 1px 2px rgba(15,23,42,0.04),0 6px 16px rgba(15,23,42,0.06);--shadow:0 8px 30px rgba(15,23,42,0.08);--shadow-lg:0 24px 60px rgba(2,6,23,0.25);--t-fast:0.15s ease}*{box-sizing:border-box}body,html{margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Noto Sans Bengali,Helvetica Neue,Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.55;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}a.btn:focus,a.btn:hover{text-decoration:none}h1,h2,h3,h4{margin:0 0 .5rem;line-height:1.25;font-weight:700;letter-spacing:-.01em}h1{font-size:var(--text-2xl)}h2{font-size:var(--text-xl)}h3{font-size:var(--text-lg)}h4{font-size:var(--text-base)}p{margin:0 0 1rem}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;border:1px solid transparent;background:var(--blue);color:#fff;padding:.6rem 1.1rem;border-radius:10px;font-size:.95rem;font-weight:600;cursor:pointer;transition:background .15s ease,opacity .15s ease,transform .05s ease}.btn:hover{background:var(--blue-dark)}.btn:active{transform:translateY(1px)}.btn:disabled{opacity:.6;cursor:not-allowed}.btn.block{width:100%}.btn.green{background:var(--green)}.btn.green:hover{background:var(--green-dark)}.btn.ghost:hover{background:#f8fafc}.btn.danger:hover{background:#b91c1c}.btn.small{padding:.35rem .7rem;font-size:.82rem;border-radius:8px}.field{margin-bottom:1rem}.field label{display:block;font-size:.85rem;font-weight:600;color:var(--muted);margin-bottom:.35rem}.input,.select,.textarea{width:100%;padding:.65rem .8rem;border:1px solid var(--line);border-radius:10px;font-size:.95rem;font-family:inherit;background:#fff;color:var(--ink);outline:none;transition:border .15s ease,box-shadow .15s ease}.textarea{resize:vertical;min-height:90px}.input:focus,.select:focus,.textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(37,99,235,.15)}.hint{font-size:.8rem;color:var(--muted);margin-top:.3rem}.alert{padding:.7rem .9rem;border-radius:10px;font-size:.9rem;margin-bottom:1rem}.alert.error{background:#fef2f2;color:#991b1b;border:1px solid #fecaca}.alert.success{background:#f0fdf4;color:#166534;border:1px solid #bbf7d0}.alert.info{background:#eff6ff;color:#1e40af;border:1px solid #bfdbfe}.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:2rem 1rem}.auth-wrap.theme-blue{background:linear-gradient(135deg,#1e3a8a,#2563eb 55%,#60a5fa)}.auth-wrap.theme-green{background:linear-gradient(135deg,#065f46,#16a34a 55%,#4ade80)}.auth-card{width:100%;max-width:430px;background:#fff;border-radius:18px;box-shadow:0 24px 60px rgba(2,6,23,.25);padding:2.2rem}.auth-brand{text-align:center;margin-bottom:1.5rem}.auth-brand .logo-dot{display:inline-flex;width:52px;height:52px;border-radius:14px;align-items:center;justify-content:center;font-size:1.5rem;color:#fff;margin-bottom:.6rem}.theme-blue .logo-dot{background:var(--blue)}.theme-green .logo-dot{background:var(--green)}.auth-brand h1{font-size:1.4rem}.auth-brand p{margin:0}.auth-brand p,.auth-foot{color:var(--muted);font-size:.9rem}.auth-foot{text-align:center;margin-top:1.2rem}.theme-green .btn:not(.ghost){background:var(--green)}.theme-green .btn:not(.ghost):hover{background:var(--green-dark)}.theme-green .input:focus,.theme-green .textarea:focus{border-color:var(--green);box-shadow:0 0 0 3px rgba(22,163,74,.15)}.landing-nav{display:flex;align-items:center;justify-content:space-between;padding:1.1rem 2rem;background:#fff;border-bottom:1px solid var(--line)}.landing-nav .brand{font-weight:800;font-size:1.1rem;display:flex;align-items:center;gap:.5rem}.landing-nav .brand .dot{width:30px;height:30px;border-radius:9px;background:var(--blue);color:#fff;display:inline-flex;align-items:center;justify-content:center}.hero{max-width:1050px;margin:0 auto;padding:4rem 1.5rem 3rem;text-align:center}.hero h1{font-size:2.6rem;letter-spacing:-.02em}.hero .lead{font-size:1.1rem;color:var(--muted);max-width:640px;margin:1rem auto 2rem}.hero .cta{display:flex;gap:.8rem;justify-content:center;flex-wrap:wrap}.features{max-width:1050px;margin:0 auto;padding:1rem 1.5rem 4rem;display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));grid-gap:1rem;gap:1rem}.feature-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.3rem;box-shadow:var(--shadow)}.feature-card .ico{font-size:1.4rem}.feature-card h3{font-size:1.02rem;margin:.5rem 0 .35rem}.feature-card p{color:var(--muted);font-size:.9rem;margin:0}.code-block{max-width:1050px;margin:0 auto 4rem;padding:0 1.5rem}.code-block pre{background:#0f172a;color:#e2e8f0;padding:1.1rem;border-radius:var(--radius);overflow-x:auto;font-size:.85rem}.app-shell{display:flex;min-height:100vh}.sidebar{width:250px;background:#0f172a;color:#cbd5e1;padding:1.2rem 1rem;flex-shrink:0;display:flex;flex-direction:column}.sidebar .brand{font-weight:800;color:#fff;font-size:1.05rem;display:flex;align-items:center;gap:.5rem;padding:.4rem .5rem 1.2rem}.sidebar .brand .dot{width:28px;height:28px;border-radius:8px;background:var(--blue);display:inline-flex;align-items:center;justify-content:center;color:#fff}.nav-item{display:block;width:100%;text-align:left;background:transparent;border:0;color:#cbd5e1;padding:.6rem .75rem;border-radius:10px;font-size:.92rem;cursor:pointer;margin-bottom:.25rem;font-family:inherit}.nav-item:hover{background:rgba(255,255,255,.08);color:#fff}.nav-item.active{background:var(--blue)}.sidebar .foot{margin-top:auto;font-size:.78rem;color:#7c8aa5;padding:.5rem;word-break:break-all}.main{flex:1 1;min-width:0;display:flex;flex-direction:column}.topbar{background:#fff;border-bottom:1px solid var(--line);padding:.9rem 1.5rem;display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap}.topbar h2{margin:0;font-size:1.15rem}.pill{display:inline-block;padding:.2rem .6rem;border-radius:999px;font-size:.75rem;font-weight:700;background:#eef2ff;color:#3730a3;font-family:ui-monospace,monospace}.pill.green{background:#dcfce7;color:#166534}.pill.red{background:#fee2e2;color:#991b1b}.pill.gray{background:#f1f5f9;color:#475569}.content{padding:1.5rem;flex:1 1}.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.3rem;box-shadow:var(--shadow);margin-bottom:1.2rem}.card h3{font-size:1.02rem}.card .sub{color:var(--muted);font-size:.87rem;margin-bottom:1rem}.grid-2{display:grid;grid-template-columns:1fr 1fr;grid-gap:1.2rem;gap:1.2rem}.impersonate-bar{background:var(--warn);color:#1c1917;padding:.55rem 1.5rem;font-size:.9rem;display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap}.table{width:100%;border-collapse:collapse;font-size:.9rem}.table th{text-align:left;padding:.6rem .7rem;border-bottom:2px solid var(--line);color:var(--muted);font-size:.78rem;text-transform:uppercase;letter-spacing:.04em}.table td{padding:.65rem .7rem;border-bottom:1px solid var(--line);vertical-align:top}.table tr:hover td{background:#f8fafc}.table .actions{display:flex;gap:.4rem;flex-wrap:wrap}.empty{text-align:center;color:var(--muted);padding:2rem 1rem;font-size:.92rem}.row-between{align-items:center;justify-content:space-between;gap:1rem}.row,.row-between{display:flex;flex-wrap:wrap}.row{gap:.6rem;align-items:flex-end}.row>.grow{flex:1 1;min-width:180px}.chat-layout{display:grid;grid-template-columns:320px 1fr;grid-gap:1.2rem;gap:1.2rem;align-items:start}.session-list{max-height:70vh;overflow-y:auto}.session-item{padding:.75rem .8rem;border:1px solid var(--line);border-radius:10px;margin-bottom:.5rem;cursor:pointer;background:#fff}.session-item:hover{border-color:#c7d2fe}.session-item.active{border-color:var(--blue);background:var(--blue-light)}.session-item .who{font-weight:600;font-size:.9rem;display:flex;justify-content:space-between;gap:.5rem;align-items:center}.session-item .preview{color:var(--muted);font-size:.82rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.thread{height:52vh;overflow-y:auto;padding:1rem;background:#f8fafc;border:1px solid var(--line);border-radius:10px;display:flex;flex-direction:column;gap:.6rem}.bubble{max-width:78%;padding:.6rem .8rem;border-radius:12px;font-size:.9rem;white-space:pre-wrap;word-break:break-word}.bubble.user{align-self:flex-start;background:#fff;border:1px solid var(--line)}.bubble.ai{align-self:flex-end;background:#eef2ff;color:#1e293b}.bubble.admin{align-self:flex-end;background:var(--green);color:#fff}.bubble .meta{display:block;font-size:.7rem;opacity:.7;margin-top:.25rem}.reply-box{display:flex;gap:.6rem;margin-top:.8rem;align-items:flex-end}.pause-banner{background:#fff7ed;border:1px solid #fed7aa;color:#9a3412;padding:.6rem .8rem;border-radius:10px;font-size:.87rem;margin-top:.7rem;display:flex;align-items:center;gap:.5rem}.count-badge{background:var(--warn);color:#1c1917;font-weight:700;border-radius:999px;padding:.05rem .6rem;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.loading{padding:2rem;text-align:center;color:var(--muted)}.center-page{min-height:100vh;display:flex;align-items:center;justify-content:center}.checkbox{width:16px;height:16px;cursor:pointer}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.85rem}.muted{color:var(--muted)}.small{font-size:.82rem}.stack>*+*{margin-top:.6rem}@media (max-width:900px){.app-shell{flex-direction:column}.sidebar{width:100%;flex-direction:row;flex-wrap:wrap;align-items:center}.sidebar .foot{display:none}.chat-layout,.grid-2{grid-template-columns:1fr}.hero h1{font-size:2rem}}.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));grid-gap:1rem;gap:1rem;margin-bottom:1.2rem}.stat{position:relative;overflow:hidden;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:1.1rem 1.2rem;box-shadow:var(--shadow)}.stat .label{font-size:.74rem;text-transform:uppercase;letter-spacing:.06em;font-weight:700;color:var(--muted)}.stat .value{font-size:1.9rem;font-weight:800;line-height:1.1;margin-top:.3rem;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.stat .sub{font-size:.8rem;color:var(--muted);margin-top:.2rem}.stat .accent{position:absolute;right:-18px;top:-18px;width:70px;height:70px;border-radius:50%;opacity:.12}.stat.blue .accent{background:var(--blue)}.stat.green .accent{background:var(--green)}.stat.amber .accent{background:var(--warn)}.stat.violet .accent{background:#7c3aed}.section-head{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin-bottom:.8rem;flex-wrap:wrap}.section-head h3{margin:0}.acc{border:1px solid var(--line);border-radius:12px;margin-bottom:.7rem;overflow:hidden;background:#fff}.acc-head{width:100%;display:flex;align-items:center;justify-content:space-between;gap:.8rem;padding:.85rem 1rem;background:transparent;border:0;cursor:pointer;font:inherit;text-align:left}.acc-head:hover{background:#f8fafc}.acc.open .acc-head{border-bottom:1px solid var(--line)}.acc-title{font-weight:600;font-size:.95rem}.acc-right{gap:.5rem}.acc-chev,.acc-right{display:inline-flex;align-items:center}.acc-chev{width:22px;height:22px;justify-content:center;border-radius:6px;background:#eef2f7;color:#475569;font-weight:700;line-height:1}.acc-body{padding:1rem}.option-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));grid-gap:.9rem;gap:.9rem}.option{border:1px solid var(--line);border-radius:12px;padding:.95rem 1rem;background:#fff;display:flex;flex-direction:column;gap:.5rem}.option.selected{border-color:var(--blue);background:var(--blue-light)}.option .opt-head{display:flex;align-items:center;justify-content:space-between;gap:.5rem;font-weight:700}.option .opt-desc{font-size:.82rem;color:var(--muted);flex:1 1}.option .opt-price{font-size:1.15rem;font-weight:800}.wpreview{border:1px dashed var(--line);border-radius:12px;padding:1rem;background:linear-gradient(180deg,#f8fafc,#eef2f7)}.wpreview .wlauncher{width:56px;height:56px;border-radius:50%;justify-content:center;font-size:24px;box-shadow:0 10px 26px rgba(15,23,42,.25)}.wpreview .whead,.wpreview .wlauncher{color:#fff;display:flex;align-items:center}.wpreview .whead{border-radius:12px 12px 0 0;padding:.7rem .9rem;font-weight:700;gap:.6rem}.wpreview .wbody{background:#fff;border:1px solid var(--line);border-top:0;border-radius:0 0 12px 12px;padding:.8rem;font-size:.85rem;color:var(--muted)}.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));grid-gap:0 1rem;gap:0 1rem}.toolbar{display:flex;gap:.6rem;flex-wrap:wrap}.tag,.toolbar{align-items:center}.tag{display:inline-flex;gap:.3rem;font-size:.75rem;font-weight:700;padding:.15rem .5rem;border-radius:6px;background:#f1f5f9;color:#475569}.progress{height:10px;background:var(--line);border-radius:999px;overflow:hidden}.progress>span{display:block;height:100%;border-radius:999px;background:var(--blue);transition:width .4s ease}.sidebar .nav-item{display:flex;align-items:center;gap:.55rem}.topbar .title-block h2{margin:0;font-size:1.15rem}.topbar .title-block .meta{font-size:.82rem;color:var(--muted)}.chat-layout3{display:grid;grid-template-columns:310px 1fr;grid-gap:1rem;gap:1rem;align-items:start}.chat-layout3>.card:first-child{grid-column:1/-1}.folder-item{display:flex;align-items:center;justify-content:space-between;gap:.5rem;width:100%;text-align:left;background:transparent;border:0;border-radius:9px;padding:.5rem .65rem;font-size:.88rem;font-family:inherit;color:var(--ink);cursor:pointer;margin-bottom:.2rem}.folder-item:hover{background:#f1f5f9}.folder-item.active{background:var(--blue-light);color:var(--blue-dark);font-weight:700}.folder-item .count{background:#e2e8f0;color:#475569;border-radius:999px;padding:.05rem .5rem;font-size:.72rem;font-weight:700}.folder-item.active .count{background:var(--blue);color:#fff}.dot{width:8px;height:8px;border-radius:50%;background:var(--green);display:inline-block;margin-right:.4rem}.info-list{display:grid;grid-gap:.45rem;gap:.45rem;font-size:.86rem}.info-list .k{color:var(--muted);font-size:.75rem;text-transform:uppercase;letter-spacing:.04em;font-weight:700}.info-list .v{word-break:break-word}.unread-dot{width:9px;height:9px;border-radius:50%;background:var(--blue);display:inline-block}@media (max-width:1200px){.chat-layout3{grid-template-columns:200px 1fr}.chat-layout3>.conversation-card{grid-column:1/-1}}@media (max-width:800px){.chat-layout3{grid-template-columns:1fr}}@media (max-width:640px){.content{padding:1rem}.stat-grid{grid-template-columns:1fr 1fr}.stat .value{font-size:1.5rem}}.acc-head:focus-visible,.btn:focus-visible,.checkbox:focus-visible,.folder-item:focus-visible,.nav-item:focus-visible,.option:focus-visible,.session-item:focus-visible,a:focus-visible{outline:2px solid var(--blue);outline-offset:2px;border-radius:var(--radius-sm)}.btn:focus-visible{outline:none;box-shadow:0 0 0 3px var(--focus)}.btn{border-radius:var(--radius-sm);box-shadow:var(--shadow-sm);letter-spacing:.01em;transition:background var(--t-fast),border-color var(--t-fast),color var(--t-fast),box-shadow var(--t-fast)}.btn.small{border-radius:7px}.btn.ghost{background:#fff;color:var(--ink);border-color:var(--line);box-shadow:none}.btn.ghost:hover{background:var(--surface-2);border-color:#cbd5e1}.btn.danger{background:var(--danger)}.btn.danger:hover{background:var(--danger-dark)}.input,.select,.textarea{border-radius:var(--radius-sm)}.input:focus-visible,.select:focus-visible,.textarea:focus-visible{outline:none}.input:disabled,.select:disabled,.textarea:disabled{background:var(--surface-2);color:var(--muted);cursor:not-allowed}.table th{padding:.7rem .85rem;background:var(--surface-2);font-size:.72rem;letter-spacing:.06em;border-bottom:1px solid var(--line)}.table td{padding:.75rem .85rem}.table tbody tr:nth-child(2n) td{background:#fcfdff}.table tr:hover td{background:var(--blue-light)}.table .actions{gap:.35rem;align-items:center}.table-wrap{width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch}.table-wrap .table{min-width:640px}.card:has(>.table){overflow-x:auto}.card:has(>.table)>.table{min-width:620px}.card{box-shadow:var(--shadow-md)}.card>h3:first-child{margin-top:0}.content{width:100%;max-width:1440px;margin:0 auto}.topbar{position:-webkit-sticky;position:sticky;top:0;z-index:20;box-shadow:var(--shadow-sm)}.sidebar{background:linear-gradient(180deg,#0f172a,#121f3a)}.sidebar .foot{color:var(--sidebar-ink)}.sidebar-nav{display:flex;flex-direction:column;gap:2px}.nav-item{transition:background var(--t-fast),color var(--t-fast)}.nav-item .nav-ico{width:18px;display:inline-flex;justify-content:center;flex-shrink:0;opacity:.85}.nav-item .nav-label{flex:1 1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.nav-item.active{background:rgba(255,255,255,.1);color:#fff;font-weight:600;box-shadow:inset 3px 0 0 var(--blue)}.nav-item.active .nav-ico{opacity:1}.sidebar .nav-item .count-badge{margin-left:auto;font-size:.7rem;padding:0 .45rem}.pill{font-family:inherit;font-feature-settings:"tnum";font-variant-numeric:tabular-nums;letter-spacing:.01em}.empty{display:flex;flex-direction:column;align-items:center;gap:.35rem}.empty .ico{font-size:1.6rem;opacity:.55}.empty strong{color:var(--ink);font-weight:600}.loading{display:flex;align-items:center;justify-content:center;gap:.6rem}.loading:before{content:"";width:15px;height:15px;flex-shrink:0;border-radius:50%;border:2px solid var(--line);border-top-color:var(--blue);animation:cc-spin .7s linear infinite}@keyframes cc-spin{to{transform:rotate(1turn)}}.alert{border-radius:var(--radius-sm)}@media (max-width:900px){.sidebar{width:100%;flex-direction:column;align-items:stretch;gap:.6rem}.sidebar .brand{padding-bottom:0}.sidebar-nav{flex-direction:row;flex-wrap:wrap;gap:.35rem}.nav-item{width:auto;margin-bottom:0;padding:.45rem .7rem;font-size:.82rem}}@media (prefers-reduced-motion:reduce){*,:after,:before{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}}.sidebar .brand-logo{width:28px;height:28px;border-radius:8px;object-fit:cover;flex-shrink:0}.brand-text{display:flex;flex-direction:column;line-height:1.15;min-width:0}.sidebar .brand-text small{color:var(--sidebar-ink);font-size:.68rem;font-weight:500}.modal-backdrop{position:fixed;inset:0;background:rgba(15,23,42,.55);display:flex;align-items:center;justify-content:center;padding:1.5rem;z-index:100}.modal{width:100%;max-width:520px;max-height:90vh;overflow-y:auto;background:#fff;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:1.4rem}.modal h3{margin:0}.app-footer{display:flex;flex-wrap:wrap;justify-content:center;gap:.4rem 1.6rem;padding:1rem;border-top:1px solid #e2e8f0;background:var(--bg);color:var(--muted);font-size:.8rem}.footer-heart{color:#e11d48}