/* ============ 库存管理系统 样式 ============ */
:root{
  --bg:#f4f6fa; --panel:#ffffff; --ink:#1e2430; --muted:#6b7280;
  --line:#e5e8ef; --line2:#eef1f6;
  --brand:#2563eb; --brand-d:#1d4ed8; --brand-soft:#eff4ff;
  --ok:#16a34a; --ok-soft:#e9f9ef;
  --warn:#d97706; --warn-soft:#fef3e2;
  --danger:#dc2626; --danger-soft:#fdecec;
  --shadow:0 1px 3px rgba(20,30,60,.06),0 8px 24px rgba(20,30,60,.06);
  --radius:12px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg); color:var(--ink); font-size:14px; line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
.hidden{display:none !important}
code{background:#eef1f6;padding:1px 6px;border-radius:5px;font-size:12px}
.muted{color:var(--muted)}

/* ---- 登录/安装 ---- */
.auth-body{min-height:100vh;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#eef2ff,#f4f6fa 55%,#eafaf1);padding:20px}
.auth-card{background:var(--panel);width:100%;max-width:360px;padding:32px 28px;
  border-radius:16px;box-shadow:var(--shadow)}
.auth-card .brand{justify-content:center;margin-bottom:8px}
.auth-card .hint{text-align:center;margin:6px 0 18px}
.auth-card label{display:block;font-size:12px;color:var(--muted);margin:10px 0 4px}
.auth-card .check{display:flex;gap:8px;align-items:flex-start;font-size:13px;color:var(--ink);margin:14px 0}

.brand{display:flex;align-items:center;gap:9px;font-size:16px}
.brand .logo{font-size:20px}
.hint{color:var(--muted);font-size:13px}

/* ---- 按钮 / 输入 ---- */
.btn{border:1px solid var(--line);background:#fff;color:var(--ink);padding:8px 14px;
  border-radius:9px;cursor:pointer;font-size:13px;font-weight:500;transition:.12s;white-space:nowrap}
.btn:hover{border-color:#cfd6e4;background:#fafbfe}
.btn-primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-d);border-color:var(--brand-d)}
.btn-ghost{border-color:transparent;background:transparent;color:var(--muted)}
.btn-ghost:hover{background:#eef1f6;color:var(--ink)}
.btn-danger{color:var(--danger);border-color:#f3c9c9}
.btn-danger:hover{background:var(--danger-soft)}
.btn-sm{padding:5px 10px;font-size:12px}
.btn.block{display:block;width:100%;margin-top:16px;padding:10px}
.link{color:var(--brand);cursor:pointer;background:none;border:none;font-size:13px;padding:0}
.input{width:100%;border:1px solid var(--line);border-radius:9px;padding:9px 11px;
  font-size:13px;color:var(--ink);background:#fff;outline:none;transition:.12s}
.input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
select.input{cursor:pointer}
.alert-err{background:var(--danger-soft);color:var(--danger);padding:9px 12px;
  border-radius:9px;font-size:13px;margin-bottom:10px}

/* ---- 顶栏 ---- */
.topbar{display:flex;align-items:center;gap:18px;background:var(--panel);
  padding:0 20px;height:56px;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.tabs{display:flex;gap:4px;flex:1}
.tab{border:none;background:none;padding:8px 14px;border-radius:8px;cursor:pointer;
  font-size:14px;color:var(--muted);font-weight:500}
.tab:hover{background:#eef1f6;color:var(--ink)}
.tab.active{background:var(--brand-soft);color:var(--brand)}

.content{max-width:1200px;margin:0 auto;padding:20px}
.view{animation:fade .18s ease}
@keyframes fade{from{opacity:0;transform:translateY(3px)}to{opacity:1;transform:none}}

/* ---- 概览卡片 ---- */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:18px}
.card{background:var(--panel);border-radius:var(--radius);padding:16px 18px;box-shadow:var(--shadow)}
.card .k{font-size:12px;color:var(--muted)}
.card .v{font-size:24px;font-weight:700;margin-top:4px;letter-spacing:-.3px}
.card.accent .v{color:var(--brand)}
.card.warn .v{color:var(--warn)}
.card.danger .v{color:var(--danger)}

/* ---- 工具条 ---- */
.toolbar{display:flex;align-items:center;gap:10px;margin-bottom:14px;flex-wrap:wrap}
.toolbar .search{max-width:280px}
.toolbar .spacer{flex:1}
.toolbar .lbl{font-size:13px;color:var(--muted)}
.toolbar .dash{color:var(--muted)}
.toolbar .input{width:auto}

/* ---- 表格 ---- */
.table-wrap{background:var(--panel);border-radius:var(--radius);box-shadow:var(--shadow);overflow:auto}
.table-wrap.short{max-height:420px}
table.grid{width:100%;border-collapse:collapse;font-size:13px}
table.grid th,table.grid td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--line2);white-space:nowrap}
table.grid th{background:#fafbfd;color:var(--muted);font-weight:600;font-size:12px;
  position:sticky;top:0;z-index:1}
.gst{display:block;font-weight:400;font-size:10px;color:#9aa3b2;margin-top:1px;letter-spacing:0}
table.grid tbody tr:hover{background:#f9fbff}
table.grid td.num,table.grid th.num{text-align:right;font-variant-numeric:tabular-nums}
table.grid tbody tr:last-child td{border-bottom:none}
.pname{font-weight:500}
.strong{font-weight:700}
.neg{color:var(--danger);font-weight:700}
.pos{color:var(--ok);font-weight:700}
.ptag{display:inline-block;margin-left:6px;padding:1px 6px;border-radius:5px;background:var(--brand-soft);
  color:var(--brand);font-size:11px;font-weight:600;vertical-align:middle}

/* 状态徽章 */
.badge{display:inline-block;padding:2px 9px;border-radius:20px;font-size:12px;font-weight:600}
.badge.ok{background:var(--ok-soft);color:var(--ok)}
.badge.low{background:var(--warn-soft);color:var(--warn)}
.badge.over{background:var(--danger-soft);color:var(--danger)}

/* 行内操作 */
.rowbtns{display:flex;gap:6px}
.iconbtn{border:none;background:#eef1f6;color:var(--muted);width:28px;height:28px;
  border-radius:7px;cursor:pointer;font-size:13px;line-height:1}
.iconbtn:hover{background:#e2e8f4;color:var(--ink)}
.iconbtn.del:hover{background:var(--danger-soft);color:var(--danger)}

.empty{text-align:center;color:var(--muted);padding:40px}

/* ---- 管理页 ---- */
.manage-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}
.panel{background:var(--panel);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;margin-bottom:16px}
.panel-hd{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--line2)}
.panel-body{padding:16px}
.row-actions{display:flex;gap:10px;flex-wrap:wrap}

/* ---- 弹窗 ---- */
.modal-back{position:fixed;inset:0;background:rgba(20,28,48,.45);display:flex;
  align-items:center;justify-content:center;z-index:50;padding:16px;backdrop-filter:blur(2px)}
.modal{background:var(--panel);border-radius:14px;width:100%;max-width:440px;box-shadow:0 20px 60px rgba(0,0,0,.2);animation:pop .16s ease}
@keyframes pop{from{opacity:0;transform:scale(.97)}to{opacity:1;transform:none}}
.modal-hd{display:flex;justify-content:space-between;align-items:center;padding:16px 18px;border-bottom:1px solid var(--line2);font-size:15px}
.modal-body{padding:18px}
.modal-ft{padding:14px 18px;border-top:1px solid var(--line2);display:flex;justify-content:flex-end;gap:10px}
.x{border:none;background:none;font-size:16px;color:var(--muted);cursor:pointer}
.x:hover{color:var(--ink)}
.field{margin-bottom:14px}
.field label{display:block;font-size:12px;color:var(--muted);margin-bottom:5px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}

/* ---- Toast ---- */
.toast{position:fixed;bottom:26px;left:50%;transform:translateX(-50%);
  background:#1e2430;color:#fff;padding:11px 20px;border-radius:10px;font-size:13px;
  z-index:60;box-shadow:0 8px 30px rgba(0,0,0,.25);animation:up .2s ease}
.toast.err{background:var(--danger)}
.toast.ok{background:var(--ok)}
@keyframes up{from{opacity:0;transform:translate(-50%,8px)}to{opacity:1;transform:translate(-50%,0)}}

/* ---- 响应式 ---- */
@media(max-width:820px){
  .cards{grid-template-columns:1fr 1fr}
  .manage-grid{grid-template-columns:1fr}
  .content{padding:14px}
  .topbar{gap:10px;padding:0 12px}
  .brand b{display:none}
  .tabs{gap:2px}
  .tab{padding:7px 9px;font-size:13px}
  .toolbar .search{max-width:none;flex:1 1 100%}
}