/* 内部码标签管理系统 - 后台样式 */
:root {
  --bg: #0d1117; --panel: #161b22; --line: #2d333b;
  --ink: #e6edf3; --faint: #8b949e; --blue: #4493f8;
  --green: #3ddc97; --red: #ff6b6b; --amber: #ffb454;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'PingFang SC','Microsoft YaHei',sans-serif; background: var(--bg); color: var(--ink); min-height: 100vh; }
a { color: var(--blue); text-decoration: none; }

/* 顶栏 */
.topbar { display: flex; align-items: center; justify-content: space-between; padding: 14px 28px; background: var(--panel); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; }
.brand { font-size: 17px; font-weight: 700; }
.nav-links a { margin-left: 20px; color: var(--faint); font-size: 14px; padding: 6px 12px; border-radius: 6px; }
.nav-links a.on { color: var(--ink); background: rgba(68,147,248,.15); }
.nav-links a.logout { color: var(--red); }

.main { max-width: 1200px; margin: 24px auto; padding: 0 20px; }
.foot { text-align: center; color: var(--faint); font-size: 12px; padding: 30px 0 18px; }

/* 面板 */
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 22px 24px; margin-bottom: 20px; }
.panel h2 { font-size: 16px; margin-bottom: 14px; display: flex; align-items: center; gap: 8px; }
.page-head h1 { font-size: 22px; margin-bottom: 6px; }
.page-head p { color: var(--faint); font-size: 13px; margin-bottom: 20px; }

/* 统计卡片 */
.stat-row { display: flex; gap: 16px; margin-bottom: 20px; flex-wrap: wrap; }
.stat-card { flex: 1; min-width: 180px; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 18px 22px; }
.stat-card .num { font-size: 32px; font-weight: 800; font-family: 'Chakra Petch','Consolas',monospace; }
.stat-card .lbl { color: var(--faint); font-size: 12px; margin-top: 4px; letter-spacing: 1px; }
.stat-card.blue .num { color: var(--blue); }
.stat-card.green .num { color: var(--green); }
.stat-card.amber .num { color: var(--amber); }

/* 表单 */
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; color: var(--faint); margin-bottom: 6px; }
.field label b { color: var(--red); }
input[type=text], input[type=number], input[type=password], select, textarea {
  width: 100%; background: rgba(255,255,255,.04); border: 1px solid var(--line);
  border-radius: 8px; padding: 10px 14px; color: var(--ink); font-size: 14px; outline: none;
  transition: border-color .2s;
}
input:focus, select:focus, textarea:focus { border-color: var(--blue); }
.hint { font-size: 12px; color: var(--faint); margin-top: 6px; }

.btn { display: inline-flex; align-items: center; gap: 6px; padding: 10px 22px; border: none; border-radius: 8px;
  font-size: 14px; font-weight: 600; cursor: pointer; transition: transform .12s, opacity .12s; }
.btn:hover { transform: translateY(-1px); }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.btn-primary { background: linear-gradient(135deg, #4493f8, #2f6fd6); color: #fff; }
.btn-green { background: linear-gradient(135deg, #3ddc97, #22b377); color: #04150d; }
.btn-amber { background: linear-gradient(135deg, #ffb454, #f08c00); color: #241300; }
.btn-ghost { background: transparent; border: 1px solid var(--line); color: var(--faint); }
.btn-sm { padding: 6px 14px; font-size: 13px; }

/* 表格 */
table.tbl { width: 100%; border-collapse: collapse; font-size: 14px; }
.tbl th { text-align: left; color: var(--faint); font-size: 12px; letter-spacing: .5px; padding: 10px 12px; border-bottom: 1px solid var(--line); background: rgba(255,255,255,.02); }
.tbl td { padding: 10px 12px; border-bottom: 1px solid rgba(45,51,59,.5); }
.tbl tr:hover td { background: rgba(68,147,248,.04); }
.tbl .code { font-family: 'Consolas','Chakra Petch',monospace; letter-spacing: 1px; }

.badge { display: inline-block; padding: 2px 10px; border-radius: 20px; font-size: 12px; font-weight: 600; }
.badge.gray { background: rgba(139,148,158,.15); color: var(--faint); }
.badge.green { background: rgba(61,220,151,.15); color: var(--green); }

/* 提示 */
.msg { padding: 11px 14px; border-radius: 8px; font-size: 13px; margin-bottom: 14px; }
.msg.ok { background: rgba(61,220,151,.12); color: var(--green); border: 1px solid rgba(61,220,151,.25); }
.msg.err { background: rgba(255,107,107,.12); color: var(--red); border: 1px solid rgba(255,107,107,.25); }

/* 标签预览（一行2列） */
.label-preview { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
.label-pair { display: flex; border: 1.5px dashed rgba(68,147,248,.5); border-radius: 8px; overflow: hidden; }
.label-cell { width: 150px; padding: 10px; text-align: center; background: #fff; }
.label-cell + .label-cell { border-left: 1px dashed #ccc; }
.label-cell canvas, .label-cell img { display: block; margin: 0 auto; }
.label-cell .code-text { color: #000; font-size: 13px; font-family: 'Consolas',monospace; font-weight: 700; letter-spacing: 1px; margin-top: 6px; }

/* 分页 */
.pager { display: flex; gap: 8px; align-items: center; margin-top: 16px; justify-content: center; }
.pager .btn { padding: 6px 16px; }
.pager .info { color: var(--faint); font-size: 13px; }

/* 登录页 */
.login-card { width: 360px; padding: 36px 32px; }
.login-card .logo { font-size: 44px; text-align: center; margin-bottom: 14px; }
.login-card h1 { text-align: center; font-size: 19px; margin-bottom: 4px; }
.login-card .sub { text-align: center; color: var(--faint); font-size: 11px; letter-spacing: 3px; margin-bottom: 24px; }
.login-card .field { margin-bottom: 16px; }
.login-card .btn { width: 100%; justify-content: center; padding: 12px; }
.login-error { color: var(--red); font-size: 13px; text-align: center; min-height: 18px; margin-bottom: 12px; }

.toolbar { display: flex; gap: 12px; align-items: center; margin-bottom: 16px; flex-wrap: wrap; }
.toolbar input { width: 260px; }
.toolbar select { width: 130px; }