:root{
  --bg:#f5f7fb; --card:#fff; --line:#e6e9f0; --text:#1f2430; --muted:#7b8394;
  --brand:#5b5bd6; --brand-d:#4343c0; --ok:#0f9d58; --warn:#c77700; --bad:#d93025;
  --radius:12px;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);
  font:14px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}

/* layout */
.shell{display:flex;min-height:100vh}
.side{width:220px;background:#191d2b;color:#cfd3e0;display:flex;flex-direction:column;padding:18px 14px}
.brand{display:flex;gap:10px;align-items:center;margin-bottom:26px}
.logo{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,#6d6df0,#9a5bf0);
  color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;letter-spacing:.5px}
.brand-name{color:#fff;font-weight:600;font-size:14px}
.brand-sub{color:#8b91a6;font-size:12px}
.nav{display:flex;flex-direction:column;gap:4px}
.nav a{color:#c3c8d8;padding:10px 12px;border-radius:9px;font-size:14px}
.nav a:hover{background:#242a3d;text-decoration:none;color:#fff}
.nav a.on{background:#2c3350;color:#fff}
.side-foot{margin-top:auto;border-top:1px solid #2a3046;padding-top:12px;font-size:13px}
.who{color:#fff;margin-bottom:6px}
.link{background:none;border:0;color:#8b91a6;padding:0;cursor:pointer;font-size:13px}
.link:hover{color:#fff}

.main{flex:1;padding:26px 32px 60px;min-width:0}
.top{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:18px}
.top h1{font-size:20px;margin:0}
.top-meta{color:var(--muted);font-size:12px}

/* cards & grid */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;margin-bottom:18px}
.card h2{font-size:15px;margin:0 0 14px}
.grid{display:grid;gap:14px}
.g4{grid-template-columns:repeat(4,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
@media(max-width:900px){.g4{grid-template-columns:repeat(2,1fr)}.g2{grid-template-columns:1fr}}
.kpi{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px}
.kpi .n{font-size:26px;font-weight:600;line-height:1.2}
.kpi .l{color:var(--muted);font-size:12px;margin-top:2px}

/* table */
table{width:100%;border-collapse:collapse;font-size:13.5px}
th,td{text-align:left;padding:10px 8px;border-bottom:1px solid var(--line);vertical-align:middle}
th{color:var(--muted);font-weight:500;font-size:12px;text-transform:none}
tr:last-child td{border-bottom:0}
code,.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12.5px}

/* badges */
.badge{display:inline-block;padding:2px 8px;border-radius:20px;font-size:12px;border:1px solid transparent}
.badge.ok{background:#e8f6ee;color:#0f7a45;border-color:#c9e9d6}
.badge.warn{background:#fdf3e0;color:#9a5b00;border-color:#f3dfb8}
.badge.bad{background:#fdeceb;color:#b3261e;border-color:#f6cdc9}
.badge.muted{background:#eef0f5;color:#5c6373;border-color:#dfe3ec}

/* forms */
label{display:block;font-size:13px;color:#4a5162;margin:0 0 6px}
input[type=text],input[type=password],input[type=date],input[type=number],select,textarea{
  width:100%;padding:9px 11px;border:1px solid #d5dae6;border-radius:9px;background:#fff;font:inherit;color:inherit}
input:focus,select:focus,textarea:focus{outline:2px solid #dcdcff;border-color:var(--brand)}
textarea{min-height:80px;resize:vertical}
.field{margin-bottom:14px}
.hint{color:var(--muted);font-size:12px;margin-top:4px}
.row{display:flex;gap:12px}
.row>*{flex:1}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:6px;padding:9px 16px;border-radius:9px;border:1px solid transparent;
  background:var(--brand);color:#fff;font:inherit;cursor:pointer}
.btn:hover{background:var(--brand-d);text-decoration:none;color:#fff}
.btn.ghost{background:#fff;color:#3a4152;border-color:#d5dae6}
.btn.ghost:hover{background:#f2f4f9;color:#1f2430}
.btn.danger{background:#fff;color:var(--bad);border-color:#f0c2bd}
.btn.danger:hover{background:#fdf1f0}
.btn.sm{padding:5px 10px;font-size:12.5px;border-radius:7px}
.actions{display:flex;gap:8px;flex-wrap:wrap;align-items:center}

/* flash */
.flash{padding:10px 14px;border-radius:10px;margin-bottom:14px;font-size:13.5px}
.flash.ok{background:#e8f6ee;color:#0f7a45;border:1px solid #c9e9d6}
.flash.bad{background:#fdeceb;color:#b3261e;border:1px solid #f6cdc9}

/* login */
.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;
  background:radial-gradient(1200px 600px at 50% -10%,#e6e6ff 0%,#f5f7fb 60%)}
.auth{width:100%;max-width:380px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:30px 28px;
  box-shadow:0 18px 50px rgba(30,35,60,.08)}
.auth h1{font-size:18px;margin:0 0 4px}
.auth p.sub{color:var(--muted);margin:0 0 22px;font-size:13px}
.auth .btn{width:100%;justify-content:center}

/* misc */
.toolbar{display:flex;gap:10px;align-items:center;margin-bottom:14px;flex-wrap:wrap}
.toolbar form{display:flex;gap:8px;align-items:center}
.toolbar input[type=text]{width:240px}
.pager{display:flex;gap:8px;margin-top:14px;align-items:center;color:var(--muted);font-size:13px}
.pager a{padding:4px 10px;border:1px solid var(--line);border-radius:7px;background:#fff}
.empty{color:var(--muted);padding:26px;text-align:center}
.landing{max-width:640px;margin:12vh auto;padding:0 24px;text-align:center}
.landing h1{font-size:26px;margin-bottom:8px}
.landing p{color:var(--muted)}