:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --border: #e5e7eb;
  --border-strong: #d1d5db;
  --text: #1f2328;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-weak: #eff6ff;
  --danger: #dc2626;
  --danger-weak: #fef2f2;
  --success: #16a34a;
  --success-weak: #f0fdf4;
  --warn: #b45309;
  --warn-weak: #fffbeb;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  font-size: 14px;
  line-height: 1.6;
}

a { color: var(--primary); text-decoration: none; }

/* ---------- 登录 ---------- */
.login-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
}

.login-card {
  width: 360px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 32px 28px;
}

.login-card h1 { font-size: 20px; margin: 0 0 4px; font-weight: 600; }
.login-card .sub { color: var(--muted); font-size: 13px; margin-bottom: 24px; }

/* ---------- 布局 ---------- */
.app { display: flex; min-height: 100vh; }

.sidebar {
  width: 196px;
  flex: 0 0 196px;
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 18px 12px;
  height: 100vh;
  position: sticky;
  top: 0;
  display: flex;
  flex-direction: column;
}

.brand {
  font-size: 15px;
  font-weight: 600;
  padding: 0 8px 18px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand .dot {
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: var(--primary);
}

.nav-item {
  display: block;
  padding: 8px 10px;
  border-radius: 8px;
  color: var(--text);
  cursor: pointer;
  margin-bottom: 2px;
  font-size: 14px;
}

.nav-item:hover { background: var(--bg); }
.nav-item.active { background: var(--primary-weak); color: var(--primary-dark); font-weight: 500; }

.sidebar-foot {
  margin-top: auto;
  padding: 10px;
  font-size: 12px;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

.main { flex: 1; padding: 22px 26px 40px; overflow-x: hidden; }

.page-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  gap: 12px;
  flex-wrap: wrap;
}

.page-head h2 { font-size: 18px; font-weight: 600; margin: 0; }
.page-head .desc { color: var(--muted); font-size: 13px; margin-top: 2px; }

/* ---------- 组件 ---------- */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 16px;
}

.panel-title { font-size: 14px; font-weight: 600; margin-bottom: 14px; }

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.stat {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
}

.stat .label { color: var(--muted); font-size: 12px; }
.stat .value { font-size: 24px; font-weight: 600; margin-top: 4px; letter-spacing: -0.5px; }

.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

.btn {
  border: 1px solid var(--border-strong);
  background: #fff;
  color: var(--text);
  border-radius: 8px;
  padding: 7px 14px;
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
}

.btn:hover { background: var(--bg); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-dark); }
.btn.danger { color: var(--danger); border-color: #fecaca; background: var(--danger-weak); }
.btn.danger:hover { background: #fee2e2; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.sm { padding: 4px 10px; font-size: 12px; }

.input, select.input, textarea.input {
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  padding: 7px 10px;
  font-size: 13px;
  font-family: inherit;
  background: #fff;
  color: var(--text);
  outline: none;
}

.input:focus { border-color: var(--primary); }
textarea.input { width: 100%; resize: vertical; }

.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; margin-bottom: 5px; color: var(--muted); }
.field .hint { font-size: 12px; color: var(--muted); margin-top: 4px; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }

table { width: 100%; border-collapse: collapse; }
th, td { padding: 9px 10px; text-align: left; border-bottom: 1px solid var(--border); font-size: 13px; }
th { color: var(--muted); font-weight: 500; font-size: 12px; background: #fafbfc; }
tbody tr:hover { background: #fafbfc; }
td.code { font-family: Consolas, "Courier New", monospace; letter-spacing: .3px; }
td.nowrap { white-space: nowrap; }

.badge {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 20px;
  font-size: 12px;
  border: 1px solid transparent;
}

.badge.unused { background: var(--primary-weak); color: var(--primary-dark); border-color: #bfdbfe; }
.badge.used { background: var(--success-weak); color: var(--success); border-color: #bbf7d0; }
.badge.disabled { background: #f3f4f6; color: #4b5563; border-color: #e5e7eb; }
.badge.expired { background: var(--warn-weak); color: var(--warn); border-color: #fde68a; }
.badge.fail { background: var(--danger-weak); color: var(--danger); border-color: #fecaca; }

.empty { text-align: center; color: var(--muted); padding: 40px 0; font-size: 13px; }

.pager { display: flex; align-items: center; justify-content: flex-end; gap: 10px; margin-top: 14px; font-size: 13px; color: var(--muted); }

/* ---------- 趋势图 ---------- */
.chart { display: flex; align-items: flex-end; gap: 6px; height: 140px; padding-top: 10px; }
.chart .bar-wrap { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 6px; height: 100%; justify-content: flex-end; }
.chart .bar { width: 100%; max-width: 34px; background: #bfdbfe; border-radius: 4px 4px 0 0; min-height: 2px; }
.chart .bar.zero { background: #e5e7eb; }
.chart .bar-label { font-size: 11px; color: var(--muted); }

/* ---------- 模态 ---------- */
.mask {
  position: fixed;
  inset: 0;
  background: rgba(17, 24, 39, .45);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 60px;
  z-index: 50;
}

.modal {
  background: #fff;
  border-radius: 12px;
  width: 560px;
  max-width: calc(100vw - 32px);
  max-height: calc(100vh - 100px);
  overflow: auto;
  padding: 22px 24px;
}

.modal h3 { margin: 0 0 18px; font-size: 16px; font-weight: 600; }
.modal-foot { display: flex; justify-content: flex-end; gap: 8px; margin-top: 20px; }

/* ---------- 提示 ---------- */
.toast {
  position: fixed;
  top: 18px;
  left: 50%;
  transform: translateX(-50%);
  background: #111827;
  color: #fff;
  padding: 9px 18px;
  border-radius: 8px;
  font-size: 13px;
  z-index: 100;
  opacity: .96;
}

.result-box { border-radius: 8px; padding: 12px 14px; font-size: 13px; margin-top: 12px; }
.result-box.ok { background: var(--success-weak); border: 1px solid #bbf7d0; color: #15803d; }
.result-box.error { background: var(--danger-weak); border: 1px solid #fecaca; color: #b91c1c; }

.kv { font-family: Consolas, monospace; font-size: 12px; background: #f3f4f6; padding: 10px 12px; border-radius: 8px; word-break: break-all; }
.mono { font-family: Consolas, monospace; }
.muted { color: var(--muted); }
.mt8 { margin-top: 8px; }
.mt16 { margin-top: 16px; }