:root{--navy: #0E1B3A;--indigo: #1F3A93;--accent: #2ECC9B;--ink: #1A1F2E;--muted: #6B7280;--line: #E5E9F0;--bg: #F5F7FB;--card: #FFFFFF;--radius: 10px}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}h1{font-size:22px;margin:0 0 18px;color:var(--navy)}h3{margin:0 0 12px;color:var(--navy);font-size:15px}a.link{color:var(--indigo);cursor:pointer;text-decoration:none}a.link:hover{text-decoration:underline}.muted{color:var(--muted)}.small{font-size:12px}.center{display:flex;align-items:center;justify-content:center;min-height:200px}.app{display:flex;min-height:100vh}.sidebar{width:220px;background:var(--navy);color:#fff;padding:20px 14px;flex-shrink:0}.brand{font-weight:800;letter-spacing:1px;color:#fff;margin-bottom:24px;padding:0 8px}.sidebar nav{display:flex;flex-direction:column;gap:2px}.sidebar nav a{color:#aebbdd;text-decoration:none;padding:10px 12px;border-radius:8px;font-size:14px}.sidebar nav a:hover{background:#ffffff0f;color:#fff}.sidebar nav a.active{background:var(--indigo);color:#fff}.main{flex:1;display:flex;flex-direction:column;min-width:0}.topbar{height:56px;background:var(--card);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 24px}.content{padding:24px;flex:1}.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px}.grid-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:14px}.stat{text-align:left}.stat-num{font-size:30px;font-weight:800;color:var(--indigo)}.two-col{display:grid;grid-template-columns:360px 1fr;gap:16px;align-items:start}label{display:block;font-size:13px;color:var(--muted);margin:12px 0 4px}input,select,textarea{width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:8px;font-size:14px;font-family:inherit;background:#fff}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--indigo)}.btn{background:var(--indigo);color:#fff;border:none;padding:10px 16px;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;margin-top:14px;display:inline-block}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-sm{background:var(--indigo);color:#fff;border:none;padding:5px 10px;border-radius:6px;font-size:12px;cursor:pointer}.btn-ghost{background:transparent;border:1px solid var(--line);padding:6px 12px;border-radius:8px;cursor:pointer;color:var(--ink)}table{width:100%;border-collapse:collapse;font-size:14px}th{text-align:left;color:var(--muted);font-weight:600;padding:8px 10px;border-bottom:2px solid var(--line);font-size:12px}td{padding:9px 10px;border-bottom:1px solid var(--line)}.pill{display:inline-block;font-size:12px;font-weight:600;padding:3px 10px;border-radius:20px;background:#eef2fb;color:#2749b0;margin:2px}.pill.ok{background:#e4f7f0;color:#127a5b}.pill.warn{background:#fff4e0;color:#9a6700}.pill.danger{background:#fde8e8;color:#b42318}.row-between{display:flex;align-items:center;justify-content:space-between}.row-wrap{display:flex;flex-wrap:wrap;gap:6px}.notice{padding:10px 14px;border-radius:8px;margin-bottom:14px;font-size:14px}.notice.ok{background:#e4f7f0;color:#127a5b}.notice.danger{background:#fde8e8;color:#b42318}.error{background:#fde8e8;color:#b42318;padding:8px 12px;border-radius:8px;font-size:13px;margin-top:10px}.login-wrap{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(150deg,#0b1530,#1f3a93)}.login-card{width:320px}.login-card input{margin-top:12px}.inbox{display:grid;grid-template-columns:280px 1fr;gap:16px;height:70vh}.conv-list{overflow-y:auto;padding:6px}.conv-item{padding:10px 12px;border-radius:8px;cursor:pointer}.conv-item:hover{background:var(--bg)}.conv-item.active{background:#eef2fb}.conv-name{font-weight:600;font-size:14px}.conv-thread{display:flex;flex-direction:column}.thread-head{font-weight:700;color:var(--navy);padding-bottom:10px;border-bottom:1px solid var(--line);margin-bottom:12px}.thread-msgs{overflow-y:auto;display:flex;flex-direction:column;gap:8px}.bubble{max-width:70%;padding:8px 12px;border-radius:10px;font-size:14px}.bubble.in{background:var(--bg);align-self:flex-start}.bubble.out{background:#e4f7f0;align-self:flex-end}