:root {
  --bg: #f5f6f4;
  --panel: #ffffff;
  --line: #e3e5e0;
  --line-2: #d3d5cf;
  --text: #2c2c2a;
  --text-2: #6b6b66;
  --text-3: #97978f;
  --blue: #185fa5;
  --blue-bg: #e6f1fb;
  --amber: #854f0b;
  --amber-bg: #faeeda;
  --green: #3b6d11;
  --green-bg: #eaf3de;
  --red: #a32d2d;
  --red-bg: #fcebeb;
  --radius: 10px;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
}
#app { max-width: 1120px; margin: 0 auto; padding: 20px 16px 60px; }
.loading { color: var(--text-3); text-align: center; padding: 80px 0; }

/* 卡片 / 登录框 */
.auth-wrap { max-width: 380px; margin: 8vh auto 0; }
.auth-card { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 28px 26px; }
.auth-card h1 { font-size: 19px; font-weight: 500; margin: 0 0 4px; }
.auth-card .sub { color: var(--text-2); font-size: 13px; margin-bottom: 20px; }
.brand { font-size: 13px; color: var(--text-3); margin-bottom: 18px; letter-spacing: .5px; }

/* 顶栏 */
.topbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; gap: 12px; flex-wrap: wrap; }
.topbar .title { font-size: 18px; font-weight: 500; }
.topbar .title small { font-weight: 400; color: var(--text-3); font-size: 13px; margin-left: 8px; }
.topbar .who { color: var(--text-2); font-size: 13px; display: flex; align-items: center; gap: 12px; }

/* 导航 */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 20px; flex-wrap: wrap; }
.tabs button {
  background: none; border: none; padding: 9px 14px; font-size: 14px; color: var(--text-2);
  cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -1px; font-family: inherit;
}
.tabs button:hover { color: var(--text); }
.tabs button.active { color: var(--blue); border-bottom-color: var(--blue); font-weight: 500; }

/* 表单 */
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; color: var(--text-2); margin-bottom: 5px; }
.field label .req { color: var(--red); margin-left: 2px; }
.field .hint { font-size: 12px; color: var(--text-3); margin-top: 4px; }
input, select, textarea {
  width: 100%; padding: 8px 10px; border: 1px solid var(--line-2); border-radius: 8px;
  font-size: 14px; font-family: inherit; background: #fff; color: var(--text);
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--blue); }
input.bad { border-color: var(--red); background: var(--red-bg); }
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > .field { flex: 1 1 200px; }

/* 按钮 */
button.btn {
  padding: 8px 16px; border-radius: 8px; border: 1px solid var(--line-2); background: #fff;
  color: var(--text); font-size: 14px; cursor: pointer; font-family: inherit;
}
button.btn:hover { border-color: var(--text-3); }
button.btn.primary { background: var(--blue); border-color: var(--blue); color: #fff; }
button.btn.primary:hover { opacity: .92; }
button.btn.ok { background: var(--green); border-color: var(--green); color: #fff; }
button.btn.danger { background: #fff; border-color: var(--red); color: var(--red); }
button.btn.sm { padding: 5px 10px; font-size: 13px; }
button.btn:disabled { opacity: .5; cursor: not-allowed; }

/* 表格 */
table { width: 100%; border-collapse: collapse; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); font-size: 13px; vertical-align: middle; }
th { background: #fafbf9; color: var(--text-2); font-weight: 500; white-space: nowrap; }
tr:last-child td { border-bottom: none; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.mono { font-family: ui-monospace, "SFMono-Regular", Consolas, monospace; font-size: 12.5px; }

/* 状态标签 */
.tag { display: inline-block; padding: 1px 8px; border-radius: 20px; font-size: 12px; white-space: nowrap; }
.tag.pending { background: var(--amber-bg); color: var(--amber); }
.tag.approved { background: var(--blue-bg); color: var(--blue); }
.tag.paid { background: var(--green-bg); color: var(--green); }
.tag.rejected { background: var(--red-bg); color: var(--red); }
.tag.warn { background: var(--red-bg); color: var(--red); }

/* 面板 */
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 22px; margin-bottom: 18px; }
.panel h2 { font-size: 15px; font-weight: 500; margin: 0 0 4px; }
.panel .desc { color: var(--text-2); font-size: 13px; margin-bottom: 16px; }
.empty { color: var(--text-3); text-align: center; padding: 36px 0; font-size: 13px; }
.toolbar { display: flex; gap: 10px; align-items: center; margin-bottom: 14px; flex-wrap: wrap; }
.toolbar .spacer { flex: 1; }
.pill { font-size: 12px; color: var(--text-2); background: #f2f3f0; padding: 3px 10px; border-radius: 20px; }

.toast { position: fixed; left: 50%; bottom: 32px; transform: translateX(-50%); background: #2c2c2a; color: #fff; padding: 10px 18px; border-radius: 8px; font-size: 13px; opacity: 0; transition: opacity .2s; pointer-events: none; z-index: 50; }
.toast.show { opacity: .95; }
.toast.err { background: var(--red); }

.modal-mask { position: fixed; inset: 0; background: rgba(0,0,0,.32); display: flex; align-items: center; justify-content: center; z-index: 40; padding: 20px; }
.modal { background: #fff; border-radius: 14px; max-width: 520px; width: 100%; max-height: 86vh; overflow: auto; padding: 22px; }
.modal h3 { font-size: 15px; font-weight: 500; margin: 0 0 14px; }
.kv { display: grid; grid-template-columns: 96px 1fr; gap: 6px 12px; font-size: 13px; margin-bottom: 14px; }
.kv .k { color: var(--text-2); }
.note { background: var(--amber-bg); color: var(--amber); border-radius: 8px; padding: 10px 12px; font-size: 12.5px; margin-bottom: 14px; }
.invoice-thumb { max-width: 100%; border: 1px solid var(--line); border-radius: 8px; margin-top: 8px; }
.searchbox { display: flex; gap: 8px; margin-bottom: 14px; }

/* 手机端适配 */
@media (max-width: 640px) {
  #app { padding: 12px 10px 50px; }
  .topbar .title { font-size: 16px; }
  .topbar .title small { display: block; margin: 2px 0 0; }
  .tabs { overflow-x: auto; flex-wrap: nowrap; }
  .tabs button { padding: 8px 10px; font-size: 13px; white-space: nowrap; }
  .row > .field { flex: 1 1 100%; }
  .panel { padding: 16px 14px; }
  table { display: block; overflow-x: auto; white-space: nowrap; }
  .kv { grid-template-columns: 84px 1fr; }
  .auth-wrap { margin-top: 4vh; }
  .auth-card { padding: 22px 18px; }
  .modal { padding: 18px 16px; }
}