:root{--bg:#f4f6fb;--card:#fff;--text:#0f172a;--muted:#64748b;--line:#e2e8f0;--pri:#4f46e5;--pri2:#6366f1;--side:#0f172a;--side2:#1e293b;--ok:#16a34a;--warn:#d97706;--bad:#dc2626;--info:#0284c7;--r:10px}
*{box-sizing:border-box}html,body{margin:0}body{font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;background:var(--bg);color:var(--text);font-size:14.5px;line-height:1.5}
a{color:var(--pri);text-decoration:none}a:hover{text-decoration:underline}
h1{font-size:22px;margin:0 0 16px}h2{font-size:17px;margin:0 0 12px}h3{font-size:15px;margin:0 0 10px}
.layout{display:flex;min-height:100vh}.side{width:236px;background:var(--side);color:#cbd5e1;flex-shrink:0;position:sticky;top:0;height:100vh;overflow:auto}
.side .brand{padding:18px 18px;font-weight:800;color:#fff;font-size:17px;border-bottom:1px solid var(--side2);display:flex;gap:8px;align-items:center}
.side .brand span{background:var(--pri);border-radius:8px;width:30px;height:30px;display:inline-flex;align-items:center;justify-content:center}
.side nav{padding:10px 8px}.side nav a{display:flex;justify-content:space-between;color:#cbd5e1;padding:8px 12px;border-radius:8px;margin:1px 0}
.side nav a:hover,.side nav a.on{background:var(--side2);color:#fff;text-decoration:none}.side nav .sec{font-size:11px;text-transform:uppercase;color:#64748b;padding:12px 12px 4px;letter-spacing:.06em}
.cnt{background:var(--bad);color:#fff;border-radius:99px;padding:0 7px;font-size:12px}
.main{flex:1;min-width:0}.top{background:#fff;border-bottom:1px solid var(--line);padding:12px 24px;display:flex;justify-content:space-between;align-items:center;gap:12px}
.wrap{padding:24px;max-width:1280px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px;margin-bottom:18px}
.grid{display:grid;gap:16px}.g2{grid-template-columns:repeat(2,minmax(0,1fr))}.g3{grid-template-columns:repeat(3,minmax(0,1fr))}.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:16px}.stat .v{font-size:22px;font-weight:700}.stat .k{color:var(--muted);font-size:13px}
table{width:100%;border-collapse:collapse}th,td{padding:9px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}th{font-size:12px;text-transform:uppercase;color:var(--muted);font-weight:600;background:#f8fafc}
tr:hover td{background:#fafbff}.tbl{overflow-x:auto}.r{text-align:right}.c{text-align:center}.muted{color:var(--muted)}.small{font-size:12.5px}.b{font-weight:600}
.btn{display:inline-block;border:1px solid var(--pri);background:var(--pri);color:#fff;padding:8px 14px;border-radius:8px;cursor:pointer;font-size:14px;font-weight:500;line-height:1.2}
.btn:hover{background:var(--pri2);text-decoration:none}.btn.sm{padding:5px 10px;font-size:13px}.btn.o{background:#fff;color:var(--pri)}.btn.g{background:var(--ok);border-color:var(--ok)}.btn.d{background:var(--bad);border-color:var(--bad)}.btn.w{background:var(--warn);border-color:var(--warn)}.btn.gr{background:#fff;color:var(--text);border-color:var(--line)}
input,select,textarea{width:100%;padding:8px 10px;border:1px solid #cbd5e1;border-radius:8px;font:inherit;background:#fff}textarea{min-height:90px}
input[type=checkbox],input[type=radio]{width:auto}label{display:block;font-size:13px;font-weight:600;margin:0 0 4px;color:#334155}.f{margin-bottom:12px}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.between{justify-content:space-between}.inline{display:inline}
.bd{display:inline-block;padding:2px 9px;border-radius:99px;font-size:12px;font-weight:600;background:#e2e8f0;color:#334155;white-space:nowrap}
.bd.Active,.bd.Paid,.bd.Answered,.bd.sent,.bd.Thành{background:#dcfce7;color:#166534}.bd.Pending,.bd.Unpaid,.bd.Open,.bd.Draft{background:#fef3c7;color:#92400e}
.bd.Suspended,.bd.Customer-Reply,.bd.Overdue,.bd.failed{background:#fee2e2;color:#991b1b}.bd.Terminated,.bd.Cancelled,.bd.Closed,.bd.Fraud,.bd.Refunded,.bd.skipped{background:#e2e8f0;color:#475569}
.alert{padding:11px 14px;border-radius:8px;margin-bottom:14px;border:1px solid}.alert.success{background:#f0fdf4;border-color:#bbf7d0;color:#166534}.alert.danger{background:#fef2f2;border-color:#fecaca;color:#991b1b}
.alert.info{background:#f0f9ff;border-color:#bae6fd;color:#075985}.alert.warning{background:#fffbeb;border-color:#fde68a;color:#92400e}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:16px;flex-wrap:wrap}.tabs a{padding:9px 14px;color:var(--muted);border-bottom:2px solid transparent}.tabs a.on{color:var(--pri);border-color:var(--pri);font-weight:600}.tabs a:hover{text-decoration:none;color:var(--text)}
.pager{display:flex;gap:6px;margin-top:12px}.pager a,.pager span{padding:4px 10px;border:1px solid var(--line);border-radius:6px;background:#fff}
.kv{display:grid;grid-template-columns:150px 1fr;gap:6px 12px}.kv div:nth-child(odd){color:var(--muted)}
code,.mono{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:13px;background:#f1f5f9;padding:2px 6px;border-radius:5px;word-break:break-all}
.bar{display:flex;align-items:flex-end;gap:6px;height:170px;padding-top:10px}.bar div{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;height:100%;font-size:11px;color:var(--muted)}
.bar i{display:block;width:100%;background:linear-gradient(180deg,var(--pri2),var(--pri));border-radius:5px 5px 0 0;min-height:2px}
.msg{border:1px solid var(--line);border-radius:10px;margin-bottom:12px;overflow:hidden}.msg .h{padding:8px 14px;background:#f8fafc;display:flex;justify-content:space-between;font-size:13px}.msg.staff .h{background:#eef2ff}.msg .bdy{padding:14px}
/* public */
.pub-nav{background:#0b1020;color:#fff}.pub-nav .in{max-width:1180px;margin:auto;display:flex;justify-content:space-between;align-items:center;padding:14px 20px}.pub-nav a{color:#e2e8f0;margin-left:18px}
.hero{background:radial-gradient(1200px 500px at 20% -10%,#4338ca 0,transparent 60%),radial-gradient(900px 400px at 90% 10%,#7c3aed 0,transparent 55%),#0b1020;color:#fff;padding:80px 20px 110px;text-align:center}
.hero h1{font-size:44px;margin:0 0 14px;line-height:1.15}.hero p{color:#c7d2fe;font-size:18px;max-width:680px;margin:0 auto 26px}
.container{max-width:1180px;margin:auto;padding:0 20px}.plans{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,360px));justify-content:center;gap:20px;margin-top:-70px}
.plan{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px;box-shadow:0 10px 30px rgba(15,23,42,.08);position:relative}.plan.feat{border:2px solid var(--pri)}
.plan .tag{position:absolute;top:-12px;right:20px;background:var(--pri);color:#fff;font-size:12px;padding:3px 10px;border-radius:99px}
.plan .price{font-size:30px;font-weight:800;margin:10px 0}.plan ul{list-style:none;padding:0;margin:16px 0}.plan li{padding:5px 0;border-bottom:1px dashed var(--line)}.plan li:before{content:"✓ ";color:var(--ok);font-weight:700}
.feats{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;margin:60px 0}.feats .card{text-align:center}.feats .ic{font-size:30px}
.auth{max-width:420px;margin:60px auto}.foot{text-align:center;color:var(--muted);padding:30px;font-size:13px}
.cyc label{display:flex;justify-content:space-between;align-items:center;border:1px solid var(--line);border-radius:10px;padding:12px 14px;margin-bottom:8px;cursor:pointer;font-weight:500}
.cyc input:checked+span{font-weight:700;color:var(--pri)}
.mtoggle{display:none}
@media(max-width:900px){.g2,.g3,.g4{grid-template-columns:1fr}.side{position:fixed;left:-260px;z-index:20;transition:.2s}.side.open{left:0}.mtoggle{display:inline-block}.wrap{padding:16px}.hero h1{font-size:30px}.kv{grid-template-columns:1fr}.top{padding:10px 16px}}
@media print{.side,.top,.noprint{display:none!important}.wrap{padding:0}.card{border:0}}
/* chat */
.chat-fab{position:fixed;right:22px;bottom:22px;width:58px;height:58px;border-radius:50%;background:var(--pri);color:#fff;border:0;font-size:26px;cursor:pointer;box-shadow:0 8px 24px rgba(79,70,229,.45);z-index:50}
.chat-fab .cnt{position:absolute;top:-2px;right:-2px;font-size:12px;padding:1px 7px}
.chat-box{position:fixed;right:22px;bottom:92px;width:360px;max-width:calc(100vw - 32px);height:500px;max-height:calc(100vh - 120px);background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 16px 40px rgba(15,23,42,.18);display:none;flex-direction:column;z-index:50;overflow:hidden}
.chat-box.open{display:flex}.chat-head{background:var(--pri);color:#fff;padding:12px 16px;display:flex;justify-content:space-between;align-items:center}
.chat-head button{background:none;border:0;color:#fff;font-size:20px;cursor:pointer}
.chat-msgs{flex:1;overflow-y:auto;padding:12px;background:#f8fafc;display:flex;flex-direction:column;gap:6px}
.cm{max-width:80%;padding:8px 12px;border-radius:14px;white-space:pre-wrap;word-wrap:break-word;font-size:14px}
.cm small{display:block;font-size:10.5px;opacity:.65;margin-top:2px}.cm.me{align-self:flex-end;background:var(--pri);color:#fff;border-bottom-right-radius:4px}
.cm.them{align-self:flex-start;background:#fff;border:1px solid var(--line);border-bottom-left-radius:4px}
.chat-form{display:flex;gap:6px;padding:10px;border-top:1px solid var(--line)}.chat-form textarea{min-height:40px;height:40px;resize:none}
.chat-empty{color:var(--muted);text-align:center;margin:auto;font-size:13px;padding:20px}
.chat-admin{display:grid;grid-template-columns:300px 1fr;height:calc(100vh - 150px);min-height:420px;background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.chat-list{border-right:1px solid var(--line);overflow-y:auto}.chat-list a{display:block;padding:11px 14px;border-bottom:1px solid var(--line);color:var(--text)}
.chat-list a:hover{background:#f8fafc;text-decoration:none}.chat-list a.on{background:#eef2ff}.chat-list .p{font-size:12.5px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chat-pane{display:flex;flex-direction:column;min-width:0}.chat-pane .chat-head{background:#f8fafc;color:var(--text);border-bottom:1px solid var(--line)}
@media(max-width:900px){.chat-admin{grid-template-columns:1fr}.chat-list{max-height:200px;border-right:0;border-bottom:1px solid var(--line)}}
.preview-mail{border:1px solid var(--line);border-radius:10px;overflow:hidden}.preview-mail .meta{background:#f8fafc;padding:10px 14px;font-size:13px;border-bottom:1px solid var(--line)}
.preview-mail iframe{width:100%;height:520px;border:0;background:#fff}
@media(max-width:1100px){.tplgrid{grid-template-columns:1fr!important}}