:root {
  --primary: #2563eb;
  --primary-d: #1d4ed8;
  --bg: #f5f7fb;
  --side: #1e293b;
  --side-2: #273449;
  --line: #e3e8f0;
  --text: #1f2937;
  --muted: #6b7280;
  --ok: #16a34a;
  --warn: #d97706;
  --bad: #dc2626;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif; background: var(--bg); color: var(--text); font-size: 14px; }

/* ---------- 登录 ---------- */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, #1e293b, #2563eb); }
.login-card { width: 360px; background: #fff; border-radius: 12px; padding: 32px; box-shadow: 0 20px 60px rgba(0,0,0,.25); }
.brand { font-size: 20px; font-weight: 700; text-align: center; color: var(--primary); }
.brand-sub { text-align: center; color: var(--muted); margin: 6px 0 22px; letter-spacing: 2px; }
.login-card label { display: block; margin: 12px 0 4px; color: var(--muted); font-size: 13px; }
.login-card input { width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; font-size: 14px; }
.login-card input:focus { outline: none; border-color: var(--primary); }
.error { color: var(--bad); font-size: 13px; min-height: 18px; margin-top: 8px; }
.demo-hint { margin-top: 18px; padding-top: 14px; border-top: 1px dashed var(--line); color: var(--muted); font-size: 12px; line-height: 1.7; }

/* ---------- 布局 ---------- */
.app { display: flex; min-height: 100vh; }
.sidebar { width: 220px; background: var(--side); color: #cbd5e1; flex-shrink: 0; }
.side-brand { padding: 18px 16px; font-weight: 700; color: #fff; font-size: 16px; border-bottom: 1px solid var(--side-2); }
.sidebar nav a { display: block; padding: 11px 18px; color: #cbd5e1; text-decoration: none; cursor: pointer; border-left: 3px solid transparent; }
.sidebar nav a:hover { background: var(--side-2); color: #fff; }
.sidebar nav a.active { background: var(--side-2); color: #fff; border-left-color: var(--primary); }
.sidebar nav a .bi { margin-right: 8px; }
.sidebar .nav-group-title { padding: 12px 18px 4px; font-size: 12px; color: #64748b; text-transform: uppercase; }

.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar { height: 56px; background: #fff; border-bottom: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; padding: 0 22px; }
.module-title { font-size: 17px; font-weight: 700; }
.user-box { display: flex; align-items: center; gap: 10px; }
.role-tag { background: #eef2ff; color: var(--primary); padding: 2px 8px; border-radius: 6px; font-size: 12px; }
.content { padding: 22px; overflow: auto; }

/* ---------- 控件 ---------- */
.btn { border: 1px solid var(--line); background: #fff; color: var(--text); padding: 7px 14px; border-radius: 7px; cursor: pointer; font-size: 13px; }
.btn:hover { background: #f1f5f9; }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-d); }
.btn.ghost { background: transparent; border-color: var(--line); }
.btn.danger { background: #fff; border-color: var(--bad); color: var(--bad); }
.btn.danger:hover { background: #fef2f2; }
.btn.sm { padding: 4px 9px; font-size: 12px; }
.btn.block { width: 100%; margin-top: 14px; padding: 10px; font-size: 15px; }

.card { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 18px; }
.toolbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; gap: 10px; flex-wrap: wrap; }
.toolbar .left { display: flex; gap: 10px; align-items: center; }
.search-input { padding: 7px 12px; border: 1px solid var(--line); border-radius: 7px; width: 240px; }

/* ---------- 表格 ---------- */
table.grid { width: 100%; border-collapse: collapse; background: #fff; font-size: 13px; }
table.grid th, table.grid td { padding: 9px 12px; border-bottom: 1px solid var(--line); text-align: left; }
table.grid th { background: #f8fafc; color: var(--muted); font-weight: 600; white-space: nowrap; }
table.grid tr:hover { background: #f8fbff; }
table.grid .actions { white-space: nowrap; }
.table-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: 10px; background: #fff; }

/* ---------- 表单 ---------- */
.form-row { display: flex; flex-wrap: wrap; gap: 14px; }
.form-field { display: flex; flex-direction: column; gap: 5px; flex: 1 1 220px; }
.form-field label { font-size: 13px; color: var(--muted); }
.form-field .req { color: var(--bad); }
.form-field input, .form-field select, .form-field textarea {
  padding: 8px 10px; border: 1px solid var(--line); border-radius: 7px; font-size: 14px; font-family: inherit; width: 100%;
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus { outline: none; border-color: var(--primary); }
.form-field textarea { min-height: 64px; resize: vertical; }

/* ---------- 状态标签 ---------- */
.tag { display: inline-block; padding: 2px 9px; border-radius: 20px; font-size: 12px; }
.tag.draft { background: #f1f5f9; color: #475569; }
.tag.pending { background: #fef3c7; color: #b45309; }
.tag.approved { background: #dcfce7; color: #15803d; }
.tag.rejected { background: #fee2e2; color: #b91c1c; }
.tag.run { background: #dbeafe; color: #1d4ed8; }

/* ---------- 仪表盘 ---------- */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 16px; }
.stat { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 18px; }
.stat .num { font-size: 28px; font-weight: 700; color: var(--primary); }
.stat .lbl { color: var(--muted); margin-top: 4px; }
.stat.alert .num { color: var(--warn); }

/* ---------- 弹窗 ---------- */
.modal-overlay { position: fixed; inset: 0; background: rgba(15,23,42,.45); display: flex; align-items: flex-start; justify-content: center; z-index: 50; padding-top: 60px; }
.modal-box { background: #fff; width: 720px; max-width: 94vw; max-height: 84vh; border-radius: 12px; display: flex; flex-direction: column; box-shadow: 0 20px 60px rgba(0,0,0,.3); }
.modal-head { padding: 14px 18px; border-bottom: 1px solid var(--line); font-weight: 700; display: flex; justify-content: space-between; }
.modal-close { border: none; background: none; font-size: 22px; cursor: pointer; color: var(--muted); line-height: 1; }
.modal-body { padding: 18px; overflow: auto; }
.modal-foot { padding: 12px 18px; border-top: 1px solid var(--line); display: flex; justify-content: flex-end; gap: 10px; }

/* ---------- 采购明细 ---------- */
.item-table { width: 100%; border-collapse: collapse; margin-top: 8px; }
.item-table th, .item-table td { border: 1px solid var(--line); padding: 6px; }
.item-table input { width: 100%; border: 1px solid var(--line); border-radius: 5px; padding: 5px; }
.item-total { text-align: right; font-weight: 700; margin-top: 8px; }

/* ---------- 审批日志 ---------- */
.log-item { font-size: 13px; padding: 6px 0; border-bottom: 1px dashed var(--line); }
.log-item .who { font-weight: 600; }
.log-item .act-approve { color: var(--ok); }
.log-item .act-reject { color: var(--bad); }

/* ---------- 权限矩阵 ---------- */
.perm-matrix { width: 100%; border-collapse: collapse; }
.perm-matrix th, .perm-matrix td { border: 1px solid var(--line); padding: 8px; text-align: center; }
.perm-matrix th { background: #f8fafc; }
.perm-matrix td.mod { text-align: left; font-weight: 600; }

/* ---------- 提示 ---------- */
.toast { position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%); background: #1e293b; color: #fff; padding: 11px 20px; border-radius: 8px; z-index: 100; font-size: 14px; box-shadow: 0 8px 24px rgba(0,0,0,.3); }
.empty { text-align: center; color: var(--muted); padding: 40px; }
.muted { color: var(--muted); }
.tip { background: #eff6ff; border: 1px solid #bfdbfe; color: #1e40af; padding: 10px 14px; border-radius: 8px; margin-bottom: 14px; font-size: 13px; }