:root{--bg:#0f172a;--panel:#111827;--card:#ffffff;--muted:#64748b;--text:#0f172a;--primary:#2563eb;--primary2:#7c3aed;--soft:#f8fafc;--line:#e5e7eb;--danger:#ef4444;--success:#16a34a;--warn:#f59e0b}
*{box-sizing:border-box}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;background:linear-gradient(135deg,#eef2ff,#f8fafc 45%,#ecfeff);color:var(--text)}a{text-decoration:none;color:inherit}.app-shell{display:flex;min-height:100vh}.sidebar{width:280px;background:linear-gradient(180deg,#0f172a,#111827);color:#fff;position:fixed;inset:0 auto 0 0;padding:22px 16px;overflow:auto;box-shadow:20px 0 50px rgba(15,23,42,.18);z-index:10}.brand{display:flex;gap:12px;align-items:center;margin-bottom:24px}.brand-logo{width:44px;height:44px;border-radius:16px;background:linear-gradient(135deg,var(--primary),var(--primary2));display:grid;place-items:center;font-weight:900;box-shadow:0 10px 35px rgba(37,99,235,.35)}.brand span{display:block;color:#cbd5e1;font-size:12px;margin-top:3px}.sidebar nav{display:grid;gap:8px}.sidebar nav a{padding:12px 14px;border-radius:14px;color:#cbd5e1;transition:.25s;position:relative;overflow:hidden}.sidebar nav a:hover,.sidebar nav a.active{background:rgba(255,255,255,.1);color:#fff;transform:translateX(4px)}.sidebar nav a.active:before{content:"";position:absolute;left:0;top:20%;height:60%;width:4px;background:#60a5fa;border-radius:10px}.main{margin-left:280px;width:calc(100% - 280px);padding:26px}.mobile-menu{display:none;border:0;background:#111827;color:#fff;padding:12px 16px;border-radius:14px;margin-bottom:14px}.page-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;animation:fadeUp .4s ease}.page-top h1{margin:0;font-size:30px}.page-top p{margin:6px 0 0;color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.card{background:rgba(255,255,255,.9);border:1px solid rgba(226,232,240,.9);border-radius:24px;padding:20px;box-shadow:0 20px 50px rgba(15,23,42,.08);backdrop-filter:blur(10px);margin-bottom:18px;animation:fadeUp .45s ease}.card h2{margin:0 0 14px;font-size:20px}.stat{padding:20px;border-radius:24px;background:#fff;border:1px solid var(--line);box-shadow:0 18px 45px rgba(15,23,42,.07)}.stat b{font-size:28px;display:block}.stat span{color:var(--muted)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:14px;padding:11px 16px;background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;font-weight:700;cursor:pointer;box-shadow:0 12px 30px rgba(37,99,235,.25);transition:.2s}.btn:hover{transform:translateY(-1px)}.btn.secondary{background:#111827}.btn.light{background:#f1f5f9;color:#111827;box-shadow:none}.btn.danger{background:var(--danger)}.form-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.field{display:grid;gap:7px;margin-bottom:14px}.field label{font-weight:700;font-size:13px;color:#334155}.field input,.field select,.field textarea{width:100%;border:1px solid var(--line);border-radius:14px;padding:12px 13px;font-size:15px;background:#fff}.field textarea{min-height:120px}.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:18px;background:#fff}table{width:100%;border-collapse:collapse;min-width:760px}th,td{text-align:left;padding:13px 14px;border-bottom:1px solid var(--line);vertical-align:top}th{background:#f8fafc;color:#334155;font-size:13px}.badge{display:inline-flex;padding:6px 10px;border-radius:999px;font-size:12px;font-weight:800;background:#e0f2fe;color:#0369a1}.badge.green{background:#dcfce7;color:#166534}.badge.red{background:#fee2e2;color:#991b1b}.badge.yellow{background:#fef3c7;color:#92400e}.toggle{display:flex;align-items:center;gap:10px}.toggle input{width:42px;height:22px}.notice{padding:14px 16px;border-radius:16px;background:#ecfeff;border:1px solid #a5f3fc;color:#155e75;margin-bottom:16px}.chat-demo{height:420px;background:#f8fafc;border-radius:20px;border:1px solid var(--line);display:flex;flex-direction:column;overflow:hidden}.chat-demo .msgs{flex:1;padding:16px;overflow:auto}.bubble{max-width:80%;padding:12px 14px;border-radius:16px;margin-bottom:10px;background:#fff;border:1px solid var(--line)}.bubble.me{margin-left:auto;background:#2563eb;color:#fff}.chat-input{display:flex;gap:8px;padding:12px;background:#fff;border-top:1px solid var(--line)}.chat-input input{flex:1;border:1px solid var(--line);border-radius:14px;padding:12px}@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}@media(max-width:1000px){.grid,.grid.two,.grid.three{grid-template-columns:1fr 1fr}.form-row{grid-template-columns:1fr}}@media(max-width:760px){.sidebar{transform:translateX(-105%);transition:.25s}.sidebar-open .sidebar{transform:none}.main{margin-left:0;width:100%;padding:16px}.mobile-menu{display:inline-flex}.grid,.grid.two,.grid.three{grid-template-columns:1fr}.page-top h1{font-size:24px}.card{border-radius:18px;padding:16px}table{min-width:680px}}

/* v1.2 payment public pages */
.public-page{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#0f172a,#1e293b,#312e81);padding:24px;color:#111827}
.auth-card{width:min(520px,100%);background:rgba(255,255,255,.96);border-radius:28px;padding:34px;box-shadow:0 24px 80px rgba(0,0,0,.28);animation:popIn .45s ease both}
.auth-card h1{margin:0 0 12px;font-size:30px}.auth-card p{color:#475569;line-height:1.7}
.notice.danger{background:#fff1f2;border-color:#fecdd3;color:#9f1239}
@keyframes popIn{from{opacity:0;transform:translateY(12px) scale(.98)}to{opacity:1;transform:none}}
/* v1.4 scanner and WordPress sync */
.settings-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.switch-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:13px 14px;border:1px solid var(--line);border-radius:16px;background:#fff}.switch-row span{font-weight:700;color:#334155}.switch-row input{width:44px;height:24px}.toolbar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}.codebox{border:1px dashed #cbd5e1;background:#f8fafc;border-radius:16px;padding:14px;word-break:break-all;line-height:1.6}@media(max-width:760px){.settings-grid{grid-template-columns:1fr}.toolbar .btn{width:100%;justify-content:center}}
/* v1.5 widget builder and leads */
.widget-preview{border:1px solid var(--line);border-radius:24px;background:linear-gradient(135deg,#f8fafc,#eef2ff);padding:20px;margin:14px 0}.preview-chat{max-width:360px;margin:auto;background:#fff;border:1px solid var(--line);border-radius:24px;overflow:hidden;box-shadow:0 20px 55px rgba(15,23,42,.12)}.preview-head{background:linear-gradient(135deg,var(--p),var(--s));color:white;padding:16px;font-weight:900}.preview-body{background:#f8fafc;padding:14px;min-height:220px}.preview-msg{padding:10px 12px;border-radius:16px;background:white;border:1px solid var(--line);max-width:82%;margin:8px 0}.preview-msg.me{margin-left:auto;background:var(--p);color:white}.preview-input{border-top:1px solid var(--line);padding:13px;color:#94a3b8}.mini-form{display:grid;gap:7px;min-width:180px}.mini-form textarea{min-height:64px;border:1px solid var(--line);border-radius:12px;padding:8px}.mini-form select{border:1px solid var(--line);border-radius:12px;padding:8px}.toolbar input,.toolbar select{border:1px solid var(--line);border-radius:14px;padding:11px 13px;background:#fff}.color-dot{display:inline-block;width:18px;height:18px;border-radius:99px;border:1px solid var(--line);vertical-align:middle;margin-right:6px}

/* v1.6 Live chat and tickets */
.split-layout{display:grid;grid-template-columns:360px 1fr;gap:18px;align-items:start}.session-list{display:flex;flex-direction:column;gap:10px;max-height:680px;overflow:auto}.session-item{display:block;padding:12px;border:1px solid #e5e7eb;border-radius:16px;background:#fff;text-decoration:none;color:#0f172a}.session-item.active,.session-item:hover{border-color:#2563eb;background:#eff6ff}.session-item span,.session-item small{display:block;color:#64748b;margin-top:4px}.chat-thread{height:470px;overflow:auto;background:#f8fafc;border:1px solid #e5e7eb;border-radius:18px;padding:14px}.thread-msg{max-width:78%;padding:12px;border-radius:16px;border:1px solid #e5e7eb;background:#fff;margin:10px 0}.thread-msg.visitor{margin-left:auto;background:#dbeafe}.thread-msg.bot{background:#fff}.thread-msg.agent{background:#dcfce7}.thread-msg p{margin:6px 0}.thread-msg small{color:#64748b}.reply-form textarea{width:100%;border:1px solid #e5e7eb;border-radius:16px;padding:12px;margin:12px 0}.inline-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}.inline-actions form{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.btn.danger{background:#dc2626;color:#fff}.btn.small{padding:7px 10px;font-size:12px}.toolbar{margin-bottom:12px}@media(max-width:900px){.split-layout{grid-template-columns:1fr}.chat-thread{height:360px}.thread-msg{max-width:92%}}
.progress{height:9px;background:rgba(148,163,184,.25);border-radius:999px;overflow:hidden;min-width:110px}.progress i{display:block;height:100%;background:linear-gradient(90deg,#22c55e,#2563eb);border-radius:999px}.chart-bars{display:flex;gap:10px;align-items:end;min-height:180px;overflow-x:auto;padding:12px}.chart-bars div{min-width:54px;text-align:center;color:#64748b;font-size:12px}.chart-bars i{display:block;width:34px;margin:0 auto 8px;background:linear-gradient(180deg,#2563eb,#7c3aed);border-radius:10px 10px 3px 3px;box-shadow:0 10px 20px rgba(37,99,235,.25)}

/* v1.9 advanced knowledge base and public SaaS website */
.landing{min-height:100vh;background:linear-gradient(135deg,#eef2ff,#ffffff 45%,#ecfeff);color:#0f172a}.landing-nav{display:flex;align-items:center;justify-content:space-between;padding:20px 5vw;position:sticky;top:0;background:rgba(255,255,255,.82);backdrop-filter:blur(12px);border-bottom:1px solid rgba(226,232,240,.8);z-index:4}.landing-nav strong{font-size:20px}.landing-nav div{display:flex;align-items:center;gap:18px;flex-wrap:wrap}.landing-nav a{font-weight:800;color:#334155}.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:34px;align-items:center;padding:70px 5vw}.hero.compact{display:block;text-align:center;padding:58px 5vw 20px}.hero h1{font-size:clamp(36px,5vw,68px);line-height:1.02;margin:18px 0}.hero p{font-size:18px;line-height:1.75;color:#475569;max-width:760px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.hero-card{animation:fadeUp .6s ease}.landing-grid,.pricing-strip{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;padding:10px 5vw 60px}.pricing-strip.full{grid-template-columns:repeat(4,minmax(0,1fr));align-items:stretch}.price-card ul{line-height:2;color:#334155}.price{font-size:30px;font-weight:900}.price span{font-size:14px;color:#64748b}.landing .card p{line-height:1.7;color:#475569}.doc-preview{max-height:160px;overflow:auto;background:#f8fafc;border:1px solid #e5e7eb;border-radius:14px;padding:12px;line-height:1.6}@media(max-width:1000px){.hero,.landing-grid,.pricing-strip,.pricing-strip.full{grid-template-columns:1fr}.landing-nav{align-items:flex-start;gap:12px;flex-direction:column}.hero{padding:40px 18px}.landing-grid,.pricing-strip{padding-left:18px;padding-right:18px}}

/* v2.1 settings and branding */
.brand-logo img{max-width:100%;max-height:100%;object-fit:contain;border-radius:14px}.field.wide{grid-column:1/-1}.nav-logo{height:28px;width:auto;vertical-align:middle;margin-right:8px;border-radius:8px}.public-footer{text-align:center;padding:28px 5vw;color:#64748b;border-top:1px solid #e5e7eb;background:rgba(255,255,255,.65)}.switch-row input[type=checkbox]{accent-color:var(--primary)}
@media(max-width:760px){.field.wide{grid-column:auto}.landing-nav div{width:100%;gap:10px}.landing-nav .btn.small{width:auto}}