:root{
  --primary:#2563eb;
  --primary-dark:#1d4ed8;
  --primary-soft:#dbeafe;
  --accent:#f97316;
  --danger:#dc2626;
  --success:#16a34a;
  --muted:#64748b;
  --border:#e2e8f0;
  --bg:#f8fafc;
  --surface:#ffffff;
  --text:#0f172a;
  --text-soft:#334155;
  --shadow:0 1px 3px rgba(15,23,42,.06),0 1px 2px rgba(15,23,42,.04);
  --shadow-md:0 4px 10px rgba(15,23,42,.08);
  --radius:10px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
  background:var(--bg);color:var(--text);font-size:15px;line-height:1.6;min-height:100vh;display:flex;flex-direction:column;
}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1180px;margin:0 auto;padding:0 16px;width:100%}
main.main-content{flex:1;padding:20px 16px 40px}

/* Header */
.app-header{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50;box-shadow:var(--shadow)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:56px;flex-wrap:wrap;padding:10px 16px}
.brand{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:18px;color:var(--primary)}
.brand:hover{text-decoration:none}
.brand-icon{font-size:22px}
.header-right{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.nav-bar{display:flex;gap:6px;flex-wrap:wrap;padding:8px 16px 12px;border-top:1px dashed var(--border);margin-top:4px}
.nav-bar a{padding:6px 12px;border-radius:8px;color:var(--text-soft);font-weight:500}
.nav-bar a:hover{background:var(--primary-soft);color:var(--primary-dark);text-decoration:none}
.nav-bar a.active{background:var(--primary);color:#fff}

/* Buttons & Forms */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:8px 14px;border-radius:8px;border:1px solid transparent;background:var(--primary);color:#fff;font-weight:500;cursor:pointer;font-size:14px;transition:.15s}
.btn:hover{background:var(--primary-dark);text-decoration:none;color:#fff}
.btn-block{display:flex;width:100%}
.btn-primary{background:var(--primary);color:#fff}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#ea580c}
.btn-success{background:var(--success);color:#fff}
.btn-danger{background:var(--danger);color:#fff}
.btn-ghost{background:transparent;color:var(--text-soft);border-color:var(--border)}
.btn-ghost:hover{background:#f1f5f9;color:var(--primary-dark);text-decoration:none}
.btn-sm{padding:4px 10px;font-size:13px}
.btn-outline{background:#fff;color:var(--primary);border:1.5px solid var(--primary)}
.btn-outline:hover{background:var(--primary-soft);color:var(--primary-dark)}
.inline-form{display:inline-block;margin:0}
.switch-form select{padding:6px 8px;border:1px solid var(--border);border-radius:8px;background:#fff;max-width:220px}

.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.form-grid .full{grid-column:1/-1}
.form-row{display:flex;flex-direction:column;gap:6px}
.form-row label{font-weight:500;color:var(--text-soft);font-size:14px}
.form-row input,.form-row select,.form-row textarea{padding:9px 11px;border:1px solid var(--border);border-radius:8px;background:#fff;font-size:14px;color:var(--text);outline:none;transition:.15s}
.form-row input:focus,.form-row select:focus,.form-row textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.15)}
.form-help{font-size:12px;color:var(--muted)}
.form-actions{display:flex;gap:10px;margin-top:8px}
fieldset.checkbox-row{border:0;padding:0;margin:0;display:flex;align-items:center;gap:8px}
fieldset.checkbox-row input{width:18px;height:18px}

/* Flash */
.flash{padding:10px 14px;border-radius:10px;margin:12px 0;font-weight:500;box-shadow:var(--shadow)}
.flash-success{background:#dcfce7;color:#166534;border:1px solid #bbf7d0}
.flash-error{background:#fee2e2;color:#991b1b;border:1px solid #fecaca}
.flash-info{background:#dbeafe;color:#1e40af;border:1px solid #bfdbfe}
.flash-warn{background:#ffedd5;color:#9a3412;border:1px solid #fed7aa}

/* Cards */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}
.card + .card{margin-top:16px}
.card h2,.card h3{margin-top:0}
.section-title{display:flex;align-items:center;justify-content:space-between;margin:0 0 14px;gap:10px;flex-wrap:wrap}

/* KPI grid */
.kpi-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px;margin-bottom:20px}
.kpi{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.kpi-label{color:var(--muted);font-size:13px}
.kpi-value{font-size:24px;font-weight:700;color:var(--text);margin-top:6px;word-break:break-word}
.kpi-unit{font-size:13px;color:var(--muted);margin-left:4px;font-weight:500}
.kpi-icon{position:absolute;right:12px;top:12px;font-size:22px;opacity:.18}
.kpi-accent .kpi-value{color:var(--primary-dark)}
.kpi-warn .kpi-value{color:#b45309}

/* Table */
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow)}
table.data{width:100%;border-collapse:collapse;font-size:14px}
table.data th,table.data td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--border)}
table.data th{background:#f8fafc;color:var(--text-soft);font-weight:600}
table.data tbody tr:hover{background:#f8fafc}
table.data td.num{text-align:right;font-variant-numeric:tabular-nums}
.tag{display:inline-block;padding:2px 8px;border-radius:999px;font-size:12px;font-weight:500}
.tag-full{background:#dcfce7;color:#166534}
.tag-part{background:#fef3c7;color:#92400e}
.tag-base{background:#e0e7ff;color:#3730a3}
.tag-warn{background:#fee2e2;color:#991b1b}

.empty{padding:32px;text-align:center;color:var(--muted);background:#fff;border:1px dashed var(--border);border-radius:var(--radius)}
.empty a{font-weight:600}

/* Chart */
.chart-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.chart-box{background:#fff;border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px}
.chart-box.full{grid-column:1/-1}
.chart-box h3{margin:0 0 10px;font-size:16px;color:var(--text-soft)}
.chart-canvas{width:100%;height:300px;position:relative}

/* Filters */
.filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:14px;align-items:end}
.filters .form-row{min-width:150px;flex:1}

/* Login / Install */
.auth-wrap{min-height:calc(100vh - 200px);display:flex;align-items:center;justify-content:center;padding:20px 16px}
.auth-card{width:100%;max-width:420px;padding:28px;background:#fff;border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow-md)}
.auth-card h1{margin:0 0 6px;font-size:22px;color:var(--primary-dark)}
.auth-card .subtitle{color:var(--muted);margin:0 0 22px;font-size:14px}
.auth-card .form-grid{grid-template-columns:1fr}
.site-logo{font-size:44px;text-align:center;margin-bottom:6px}

/* Footer */
.app-footer{border-top:1px solid var(--border);background:#fff;margin-top:auto}
.footer-inner{padding:14px 16px;color:var(--muted);font-size:12px;text-align:center}

/* Vision recognition */
.vision-box{background:linear-gradient(135deg,#f0f9ff 0%,#e0f2fe 100%);border:1px dashed #93c5fd;border-radius:12px;padding:16px 18px}
.vision-header{display:flex;align-items:baseline;gap:12px;margin-bottom:10px;flex-wrap:wrap}
.vision-title{font-size:15px;font-weight:600;color:var(--primary-dark)}
.vision-sub{font-size:12px;color:var(--muted)}
.vision-body{display:flex;align-items:flex-start;gap:14px;flex-wrap:wrap}
.vision-btns{display:flex;gap:10px;flex-wrap:wrap}
.vision-previews{display:flex;gap:10px;flex-wrap:wrap}
.vision-preview{position:relative;width:120px;flex-shrink:0}
.vision-preview img{width:100%;height:120px;object-fit:cover;border-radius:8px;border:1px solid var(--border)}
.vision-remove{position:absolute;top:-6px;right:-6px;width:22px;height:22px;border-radius:50%;background:var(--danger);color:#fff;border:none;cursor:pointer;font-size:12px;display:flex;align-items:center;justify-content:center}
.vision-remove:hover{background:#b91c1c}
.vision-status{flex:1;min-width:200px;font-size:13px;line-height:1.6;padding:8px 12px;background:rgba(255,255,255,.7);border-radius:8px;border:1px solid #bae6fd}

/* Responsive */
@media (max-width:768px){
  .form-grid{grid-template-columns:1fr}
  .chart-grid{grid-template-columns:1fr}
  .header-inner{flex-direction:column;align-items:flex-start}
  .nav-bar{overflow-x:auto;flex-wrap:nowrap;padding-bottom:10px}
  .nav-bar a{white-space:nowrap}
  .kpi-value{font-size:20px}
  table.data{font-size:13px}
  table.data th,table.data td{padding:8px}
  .vision-body{flex-direction:column}
  .vision-preview{width:100%}
  .vision-preview img{height:auto;max-height:200px}
}