:root {
  --bg: #f5f7fa;
  --paper: #fff;
  --ink: #20262e;
  --muted: #667085;
  --line: #d9e0e8;
  --blue: #1769aa;
  --green: #1d6f42;
  --danger: #9d2d21;
  --warning: #9a6700;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 14px/1.5 system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
}

.shell { max-width: 1240px; margin: 0 auto; padding: 0 20px; }

header { background: #132033; color: #fff; border-bottom: 3px solid var(--blue); }

.nav { height: 56px; display: flex; align-items: center; justify-content: space-between; }

.nav nav { display: flex; align-items: center; gap: 18px; }

.nav a,
.link {
  color: #fff;
  background: none;
  border: 0;
  padding: 0;
  text-decoration: none;
  font: inherit;
  cursor: pointer;
}

.summary { padding: 28px 0 18px; }
.summary h1 { margin: 0; font-size: 26px; }
.summary p,
.muted { color: var(--muted); margin: 7px 0 0; }

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin: 0 0 16px;
}

.metric {
  min-height: 112px;
  padding: 14px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.metric span,
.metric small { display: block; color: var(--muted); }
.metric span { font-size: 12px; }
.metric strong { display: block; margin: 6px 0 3px; font-size: 22px; line-height: 1.2; }
.metric small { font-size: 12px; }
.metric.positive strong { color: var(--green); }
.metric.negative strong { color: var(--danger); }
.metric.warning strong { color: var(--warning); }

.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.panel { background: var(--paper); border: 1px solid var(--line); border-radius: 6px; padding: 18px; }
.panel h2 { font-size: 17px; margin: 0 0 6px; }
.wide { margin: 16px 0; }
.notice { margin-top: 18px; padding: 11px 13px; border: 1px solid #a7d7b8; background: #eef8f0; color: var(--green); border-radius: 5px; }

label { display: block; font-weight: 600; margin: 12px 0 5px; }

input,
select {
  display: block;
  width: 100%;
  border: 1px solid #bfc9d4;
  border-radius: 4px;
  padding: 9px 10px;
  margin-top: 4px;
  background: #fff;
  color: var(--ink);
  font: inherit;
}

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.check { display: flex; align-items: center; gap: 8px; padding-top: 26px; }
.check input { width: auto; margin: 0; }

button {
  background: var(--blue);
  color: #fff;
  border: 0;
  border-radius: 4px;
  padding: 9px 13px;
  margin-top: 14px;
  font-weight: 650;
  cursor: pointer;
}

.secondary { background: #43556c; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; }
.actions button { margin-top: 0; }
.table-wrap { overflow: auto; }
table { border-collapse: collapse; width: 100%; min-width: 720px; }
th,
td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-size: 12px; }

.mapping {
  display: grid;
  grid-template-columns: 90px 1fr 1fr 150px 220px auto;
  gap: 10px;
  align-items: end;
  margin-top: 14px;
}

.mapping label,
.mapping button { margin: 0; }

.login { min-height: 100vh; display: grid; place-items: center; }
.login-box { width: min(400px, calc(100% - 32px)); background: #fff; border: 1px solid var(--line); border-radius: 6px; padding: 28px; }
.login-box h1 { margin: 0; }
.login-box p { color: var(--muted); }
.error { color: var(--danger); margin: 10px 0; }

@media (max-width: 1000px) {
  .metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 800px) {
  .grid,
  .mapping,
  .split,
  .metrics { grid-template-columns: 1fr; }
  .check { padding-top: 0; }
  .nav nav { gap: 12px; }
}