:root{--bg:#f4f6fb;--card:#fff;--text:#1f2937;--muted:#64748b;--border:#e5eaf0;--primary:#2563eb;--primary-dark:#1d4ed8;--success:#16803a;--danger:#dc2626;--warning:#c26a00;--shadow:0 8px 28px rgba(15,23,42,.07)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,Segoe UI,Arial,sans-serif;font-size:14px;line-height:1.5}button,input,textarea,select{font:inherit}[hidden]{display:none!important}h1,h2,h3,p{margin-top:0}h1{font-size:26px;line-height:1.2;margin-bottom:6px}h2{font-size:19px;margin-bottom:5px}h3{font-size:16px;margin-bottom:4px}p{color:var(--muted);margin-bottom:0}.login-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;background:radial-gradient(circle at top right,#dbeafe 0,transparent 38%),var(--bg)}.login-card{width:min(420px,100%);padding:38px;background:var(--card);border:1px solid var(--border);border-radius:20px;box-shadow:var(--shadow)}.login-card h1{text-align:center;margin-top:14px}.login-card>p{text-align:center;margin-bottom:28px}.brand-mark{width:48px;height:48px;border-radius:14px;background:var(--primary);color:#fff;font-weight:800;font-size:18px;display:flex;align-items:center;justify-content:center;letter-spacing:-.5px}.login-card>.brand-mark{margin:0 auto}.form-group{display:flex;flex-direction:column;gap:7px;margin-bottom:18px}.form-group label,label{font-weight:650;color:#334155}.form-group input,.form-group select,.form-group textarea,input[type=text],input[type=password]{width:100%;border:1px solid #cbd5e1;border-radius:9px;background:#fff;padding:11px 12px;outline:none;min-height:42px}.form-group input:focus,input[type=text]:focus,input[type=password]:focus,.form-group textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.12)}.login-button{width:100%;margin-top:3px}.form-error{color:#b91c1c;background:#fef2f2;border:1px solid #fecaca;padding:10px 12px;border-radius:8px;margin:9px 0 14px}.app-shell{min-height:100vh;display:grid;grid-template-columns:240px minmax(0,1fr)}.sidebar{background:#172235;color:#e2e8f0;padding:25px 15px;display:flex;flex-direction:column;gap:30px;min-height:100vh;position:sticky;top:0;height:100vh}.brand{display:flex;gap:12px;align-items:center;padding:0 9px}.brand-title{font-size:17px;font-weight:750;color:#fff}.brand-subtitle{font-size:12px;color:#a8b4c5}.nav{display:grid;gap:6px}.nav-item{color:#cbd5e1;text-decoration:none;padding:11px 13px;border-radius:9px;font-weight:600}.nav-item:hover,.nav-item.active{background:#2a3951;color:#fff}.sidebar-footer{margin-top:auto;padding:12px;color:#b8c5d6;font-size:12px;display:flex;align-items:center;gap:8px}.dot,.status-dot{width:8px;height:8px;border-radius:100%;background:#22c55e;display:inline-block}.main-content{min-width:0;padding:28px clamp(18px,3vw,42px) 52px}.topbar{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:27px}.topbar-status{display:flex;align-items:center;gap:12px;flex-wrap:wrap;color:var(--muted);font-size:12px}.logged-user{font-weight:700;color:#334155}.section{margin-bottom:27px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:14px}.section-heading>div:first-child{min-width:0}.engine-section,.table-card,.summary-card,.device-card{background:var(--card);border:1px solid var(--border);border-radius:14px;box-shadow:0 3px 14px rgba(15,23,42,.025)}.engine-section{padding:19px 20px}.engine-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}.engine-badge{display:inline-flex;align-items:center;justify-content:center;min-width:92px;padding:7px 10px;border-radius:999px;background:#eef2f7;color:#475569;font-size:11px;font-weight:800;letter-spacing:.4px}.engine-badge.running{background:#dcfce7;color:#166534}.engine-badge.starting{background:#fef3c7;color:#92400e}.engine-badge.stopped{background:#e2e8f0;color:#334155}.engine-badge.error{background:#fee2e2;color:#991b1b}.engine-message{color:var(--muted);font-size:12px;margin-top:11px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:36px;border:1px solid #d5dce6;border-radius:8px;background:#fff;color:#334155;padding:8px 12px;font-weight:650;cursor:pointer;text-decoration:none;transition:background .15s,border-color .15s;white-space:nowrap}.btn:hover{background:#f8fafc;border-color:#94a3b8}.btn:disabled{opacity:.48;cursor:not-allowed}.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark)}.btn-success{background:var(--success);border-color:var(--success);color:#fff}.btn-success:hover{background:#166534}.btn-danger{background:var(--danger);border-color:var(--danger);color:#fff}.btn-danger:hover{background:#b91c1c}.btn-small{min-height:29px;padding:5px 9px;font-size:12px}.device-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(255px,1fr));gap:14px}.device-card{padding:18px;min-width:0}.empty-state,.table-placeholder{color:var(--muted);padding:22px;text-align:center}.summary-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px}.summary-card{padding:17px}.summary-card span{display:block;color:var(--muted);font-size:11px;font-weight:750;letter-spacing:.5px}.summary-card strong{display:block;font-size:28px;margin-top:8px}.table-card{overflow:hidden}.table-wrap{overflow:auto;max-width:100%}.message-table{width:100%;border-collapse:collapse;min-width:700px}.message-table th,.message-table td{padding:12px 14px;border-bottom:1px solid #edf0f5;text-align:left;vertical-align:top}.message-table th{background:#f8fafc;color:#64748b;font-size:11px;text-transform:uppercase;letter-spacing:.45px;white-space:nowrap}.message-table td{color:#334155;font-size:12px}.message-table tbody tr:hover{background:#f8fafc}.settings-grid{display:grid;grid-template-columns:minmax(250px,.8fr) minmax(0,1.7fr);gap:15px}.settings-card{min-width:0}.settings-card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:17px 18px;border-bottom:1px solid var(--border)}.settings-card-head p{font-size:12px}.settings-detail{padding:16px}.detail-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.detail-item{background:#f8fafc;border:1px solid #edf0f5;border-radius:8px;padding:11px}.detail-item span{display:block;color:var(--muted);font-size:11px}.detail-item strong{display:block;margin-top:4px;overflow-wrap:anywhere}.modal-backdrop{position:fixed;inset:0;background:rgba(15,23,42,.52);z-index:1000;display:flex;align-items:center;justify-content:center;padding:18px;overflow:auto}.modal-card{width:min(580px,100%);max-height:calc(100vh - 36px);overflow:auto;background:#fff;border-radius:16px;padding:22px;box-shadow:0 20px 70px rgba(0,0,0,.25)}.modal-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:20px}.modal-head h3{font-size:19px;margin:3px 0 0}.modal-kicker{font-size:10px;font-weight:800;letter-spacing:1px;color:var(--primary)}.modal-close{width:32px;height:32px;border:0;border-radius:8px;background:#f1f5f9;color:#475569;font-size:22px;cursor:pointer}.modal-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:20px}.checkbox-list{display:grid;gap:9px}.checkbox-item{font-size:13px;font-weight:400}.api-key-display{padding:14px;background:#f1f5f9;border-radius:8px;word-break:break-all;font-family:Consolas,monospace}.status-badge{display:inline-block;padding:4px 8px;border-radius:999px;font-size:10px;font-weight:800}.status-sent{background:#dcfce7;color:#166534}.status-final-failed{background:#fee2e2;color:#991b1b}.detail-message-text{white-space:pre-wrap}.attempt-section{margin-top:22px}.connect-status,.connect-state{margin:10px 0}.qr-box{text-align:center;padding:15px}.qr-box img{max-width:280px;width:100%}.connect-help{margin:10px 0;color:var(--muted)}.connect-actions{display:flex;justify-content:flex-end;gap:8px}.send-result{margin:12px 0;padding:12px;border-radius:8px}.send-result.success{background:#dcfce7;color:#166534}.send-result.error{background:#fee2e2;color:#991b1b}.detail-item-wide{grid-column:1/-1}.modal-open{overflow:hidden}
@media(max-width:1150px){.app-shell{grid-template-columns:200px minmax(0,1fr)}.summary-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.settings-grid{grid-template-columns:1fr}.engine-section .section-heading{align-items:flex-start;flex-direction:column}.engine-actions{justify-content:flex-start}}
@media(max-width:760px){.app-shell{display:block}.sidebar{position:static;height:auto;min-height:0;padding:15px;gap:14px}.nav{display:flex;overflow:auto}.nav-item{white-space:nowrap}.sidebar-footer{display:none}.main-content{padding:20px 14px 35px}.topbar{align-items:flex-start;flex-direction:column}.topbar-status{width:100%}.section-heading{align-items:flex-start;flex-direction:column}.engine-actions{width:100%;justify-content:flex-start}.summary-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.summary-card strong{font-size:23px}.login-card{padding:26px 22px}.detail-grid{grid-template-columns:1fr}.settings-card-head{align-items:flex-start;flex-direction:column}.modal-card{padding:17px}}