:root{
  --navy:#1A2C5B; --navy-2:#16274f; --gold:#D4AF37;
  --bg:#F4F6FA; --card:#fff; --line:#E6E9F0;
  --text:#1B2437; --muted:#6B7690;
  --green:#10B981; --red:#EF4444; --orange:#F97316; --blue:#3B82F6;
  --radius:12px;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",Segoe UI,sans-serif;
  background:var(--bg); color:var(--text); font-size:14px;
}
.hidden{display:none !important}
a{cursor:pointer;text-decoration:none;color:inherit}

/* ---------- 登录 ---------- */
.login-wrap{min-height:100%;display:grid;place-items:center;background:linear-gradient(160deg,#1A2C5B,#0E1B3D)}
.login-card{width:340px;background:#fff;border-radius:18px;padding:30px 26px;box-shadow:0 20px 60px rgba(0,0,0,.35)}
.brand{display:flex;gap:12px;align-items:center;margin-bottom:24px}
.brand-mark{width:44px;height:44px;border-radius:12px;background:var(--navy);color:#fff;display:grid;place-items:center;font-weight:700;font-size:20px}
.brand-mark.sm{width:30px;height:30px;border-radius:9px;font-size:14px}
.brand h1{margin:0;font-size:20px;letter-spacing:1px}
.brand p{margin:2px 0 0;color:var(--muted);font-size:12px}
.login-card label{display:block;font-size:12px;color:var(--muted);margin:14px 0 6px}
.login-card input{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:10px;font-size:14px;outline:none}
.login-card input:focus{border-color:var(--navy);box-shadow:0 0 0 3px rgba(26,44,91,.08)}
.login-err{color:var(--red);font-size:12px;margin-top:10px;min-height:16px}

/* ---------- 布局 ---------- */
.layout{display:flex;min-height:100vh}
.sidebar{width:210px;background:var(--navy);color:#fff;display:flex;flex-direction:column;flex:0 0 210px}
.side-brand{display:flex;align-items:center;gap:10px;padding:20px 18px;font-weight:600;letter-spacing:.5px;border-bottom:1px solid rgba(255,255,255,.08)}
#nav{flex:1;padding:10px 8px;display:flex;flex-direction:column;gap:2px}
#nav a{display:flex;align-items:center;gap:10px;padding:11px 12px;border-radius:9px;color:rgba(255,255,255,.75);font-size:14px}
#nav a i{font-style:normal;width:18px;text-align:center;opacity:.9;font-size:15px}
#nav a:hover{background:rgba(255,255,255,.08);color:#fff}
#nav a.active{background:rgba(255,255,255,.14);color:#fff;font-weight:600}
.badge{margin-left:auto;background:var(--red);color:#fff;border-radius:10px;padding:1px 7px;font-size:11px;font-weight:600}
.side-foot{padding:12px 16px;border-top:1px solid rgba(255,255,255,.08);display:flex;justify-content:space-between;align-items:center;font-size:12px;color:rgba(255,255,255,.7)}
.link{background:none;border:0;color:var(--gold);cursor:pointer;font-size:12px;padding:0}

.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{height:58px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 22px}
.topbar h2{margin:0;font-size:16px}
.view{padding:20px 22px 40px;overflow:auto}

/* ---------- 通用 ---------- */
.btn{border:1px solid transparent;border-radius:9px;padding:9px 14px;font-size:13px;cursor:pointer;background:#EEF1F7;color:var(--text);font-weight:500;transition:.15s}
.btn:hover{filter:brightness(.97)}
.btn.primary{background:var(--navy);color:#fff}
.btn.primary:hover{background:var(--navy-2)}
.btn.gold{background:var(--gold);color:#3a2c00}
.btn.danger{background:#FEE2E2;color:#B91C1C}
.btn.ok{background:#DCFCE7;color:#047857}
.btn.ghost{background:#fff;border-color:var(--line)}
.btn.sm{padding:6px 10px;font-size:12px;border-radius:8px}
.btn.block{width:100%;margin-top:18px;padding:12px}
.btn:disabled{opacity:.5;cursor:not-allowed}

.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.grid{display:grid;gap:14px}
.stats{grid-template-columns:repeat(auto-fit,minmax(170px,1fr))}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.stat .k{color:var(--muted);font-size:12px}
.stat .v{font-size:26px;font-weight:700;margin-top:6px;letter-spacing:.5px}
.stat.accent{border-left:4px solid var(--gold)}

table{width:100%;border-collapse:collapse;font-size:13px}
th,td{text-align:left;padding:11px 12px;border-bottom:1px solid var(--line);vertical-align:middle}
th{color:var(--muted);font-weight:500;font-size:12px;background:#FAFBFD}
tr:last-child td{border-bottom:none}
tbody tr:hover{background:#FAFBFD}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px}
.muted{color:var(--muted)}
.right{text-align:right}
.nowrap{white-space:nowrap}
.empty{padding:40px;text-align:center;color:var(--muted)}

.tag{display:inline-block;padding:2px 8px;border-radius:6px;font-size:11px;font-weight:600;white-space:nowrap}
.tag.green{background:#DCFCE7;color:#047857}
.tag.blue{background:#DBEAFE;color:#1D4ED8}
.tag.orange{background:#FFEDD5;color:#C2410C}
.tag.gray{background:#F1F5F9;color:#475569}
.tag.red{background:#FEE2E2;color:#B91C1C}

.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.field label{font-size:12px;color:var(--muted)}
.field input,.field textarea,.field select{padding:9px 11px;border:1px solid var(--line);border-radius:9px;font-size:13px;outline:none;font-family:inherit;background:#fff}
.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--navy);box-shadow:0 0 0 3px rgba(26,44,91,.07)}
.field textarea{min-height:90px;resize:vertical}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.spacer{flex:1}
.toolbar{display:flex;gap:10px;align-items:center;margin-bottom:14px;flex-wrap:wrap}
.toolbar input,.toolbar select{padding:8px 10px;border:1px solid var(--line);border-radius:9px;font-size:13px;outline:none;background:#fff}

/* ---------- 弹窗 ---------- */
.modal-mask{position:fixed;inset:0;background:rgba(15,23,42,.5);display:grid;place-items:center;z-index:50;padding:20px}
.modal{background:#fff;border-radius:16px;width:min(680px,100%);max-height:88vh;display:flex;flex-direction:column;box-shadow:0 24px 70px rgba(0,0,0,.3)}
.modal.wide{width:min(900px,100%)}
.modal-head{padding:16px 20px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}
.modal-head h3{margin:0;font-size:15px}
.modal-body{padding:18px 20px;overflow:auto}
.modal-foot{padding:14px 20px;border-top:1px solid var(--line);display:flex;justify-content:flex-end;gap:10px}
.x{background:none;border:0;font-size:20px;color:var(--muted);cursor:pointer;line-height:1}

/* ---------- toast ---------- */
.toast-root{position:fixed;top:18px;right:18px;display:flex;flex-direction:column;gap:8px;z-index:99}
.toast{padding:11px 16px;border-radius:10px;color:#fff;font-size:13px;box-shadow:0 8px 24px rgba(0,0,0,.18);animation:in .18s ease}
.toast.ok{background:#059669}.toast.err{background:#DC2626}.toast.info{background:#2563EB}
@keyframes in{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

/* ---------- 商品编辑 ---------- */
.sku-table input{width:100%;padding:7px 9px;border:1px solid var(--line);border-radius:8px;font-size:12px}
.thumbs{display:flex;gap:10px;flex-wrap:wrap;margin-top:8px}
.thumb{position:relative;width:92px;height:92px;border-radius:10px;overflow:hidden;border:1px solid var(--line);background:#F8FAFC}
.thumb img{width:100%;height:100%;object-fit:cover;display:block}
.thumb .del{position:absolute;top:3px;right:3px;background:rgba(0,0,0,.55);color:#fff;border:0;border-radius:50%;width:20px;height:20px;cursor:pointer;line-height:1;font-size:12px}
.upload{border:1.5px dashed #CBD5E1;border-radius:10px;width:92px;height:92px;display:grid;place-items:center;color:var(--muted);font-size:12px;cursor:pointer;text-align:center;padding:6px}
.upload:hover{border-color:var(--navy);color:var(--navy)}
.items-mini{font-size:12px;color:var(--muted);line-height:1.5}
@media (max-width:820px){
  .sidebar{width:64px;flex:0 0 64px}
  .side-brand span,#nav a span.nav-text,.side-foot span{display:none}
  #nav a{justify-content:center;padding:12px 0}
  .view{padding:14px}
}