:root{
  --bg:#f5f6fb;
  --card:#ffffff;
  --line:#dfe4ef;
  --text:#202431;
  --muted:#6b7280;
  --primary:#184DA8;
}
*{box-sizing:border-box}
body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--text)}
a{color:var(--primary);text-decoration:none}
.app-shell{display:flex;min-height:100vh}
.sidebar{width:240px;background:#122b64;color:#fff;padding:18px 14px;flex:0 0 240px}
.sidebar-brand{display:flex;flex-direction:column;gap:6px;padding:6px 8px 18px}
.sidebar-brand strong{font-size:22px}
.sidebar-brand span{font-size:12px;color:#d7e3ff}
.sidebar-nav{display:flex;flex-direction:column;gap:8px}
.sidebar-nav a{display:block;padding:12px 14px;border-radius:12px;color:#fff;background:rgba(255,255,255,.06)}
.sidebar-nav a:hover{background:rgba(255,255,255,.12)}
.content{flex:1;min-width:0;padding:20px}
.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.topbar h1{margin:0;font-size:26px}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px;margin-bottom:18px}
.stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-bottom:18px}
.stat-card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px;display:flex;flex-direction:column;gap:8px}
.stat-card strong{font-size:28px;color:var(--primary)}
.stat-card span{color:var(--muted);font-size:13px}
.form-grid{display:grid;gap:14px}
.form-grid h2,.card h2{margin:0 0 4px}
label{display:grid;gap:7px}
label span{font-size:13px;color:var(--muted);font-weight:700}
input,select,textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--text);font:inherit}
textarea{min-height:110px;resize:vertical}
.checkbox-row{display:flex;align-items:center;gap:10px}
.checkbox-row input{width:auto}
.btn{display:inline-flex;align-items:center;justify-content:center;height:44px;padding:0 18px;border:0;border-radius:12px;font-weight:700;cursor:pointer}
.btn-primary{background:var(--primary);color:#fff}
.btn-full{width:100%}
.flash{padding:12px 14px;border-radius:12px;margin-bottom:16px}
.flash-success{background:#e8f7ef;color:#126c38}
.flash-error{background:#fdecec;color:#9b1c1c}
.data-table{width:100%;border-collapse:collapse}
.data-table th,.data-table td{padding:12px 10px;border-bottom:1px solid var(--line);text-align:left;font-size:14px;vertical-align:top}
.kv-list{display:grid;gap:10px}
.kv-list>div{display:flex;justify-content:space-between;gap:16px;padding:12px 14px;background:#f8f9fc;border-radius:12px}
.kv-list span{color:var(--muted)}
.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;background:linear-gradient(180deg,#184DA8 0%,#f5f6fb 100%)}
.login-card{width:min(100%,420px);background:#fff;border-radius:20px;padding:24px;border:1px solid var(--line);box-shadow:0 18px 48px rgba(0,0,0,.08)}
.login-card h1{margin:0 0 8px}
.login-card p{margin:0 0 18px;color:var(--muted)}
.login-note{margin-top:14px;font-size:13px;color:var(--muted)}
.json-box{margin:0;white-space:pre-wrap;word-break:break-word;background:#0f172a;color:#e2e8f0;padding:16px;border-radius:14px;overflow:auto}
@media (max-width: 980px){
  .app-shell{display:block}
  .sidebar{width:100%;flex:none}
  .stats-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width: 640px){
  .content{padding:14px}
  .stats-grid{grid-template-columns:1fr}
  .data-table{display:block;overflow:auto}
}