:root {
  --bg: #f5f7fb;
  --panel: #fff;
  --line: #d9e0ea;
  --text: #172033;
  --muted: #617083;
  --brand: #0b57d0;
  --danger: #b42318;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}
a { color: var(--brand); text-decoration: none; }
button, .primary {
  border: 0;
  border-radius: 6px;
  background: var(--brand);
  color: #fff;
  min-height: 38px;
  padding: 0 14px;
  font-weight: 650;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
}
input {
  border: 1px solid var(--line);
  border-radius: 6px;
  min-height: 38px;
  padding: 0 10px;
  font-size: 14px;
}
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}
.brand { font-size: 18px; font-weight: 800; color: var(--text); }
nav { display: flex; align-items: center; gap: 14px; }
nav form { margin: 0; }
nav button { background: #edf2f7; color: var(--text); }
.container { width: min(1180px, 100%); margin: 0 auto; padding: 20px; }
.login {
  width: min(420px, 100%);
  margin: 10vh auto 0;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
}
.login h1 { margin: 0 0 20px; }
.login form { display: grid; gap: 10px; }
.flash {
  margin-bottom: 12px;
  border: 1px solid var(--line);
  background: #fff8e5;
  border-radius: 6px;
  padding: 10px 12px;
}
.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 14px;
}
.stats div, .panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
}
.stats span { display: block; color: var(--muted); font-size: 12px; margin-bottom: 6px; }
.stats strong { font-size: 18px; overflow-wrap: anywhere; }
.toolbar, .table-wrap {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  margin-bottom: 14px;
}
.toolbar { padding: 12px; }
.toolbar { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.toolbar form { display: flex; gap: 10px; align-items: center; }
.toolbar input { width: min(460px, 100%); }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { border-bottom: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; }
th { color: var(--muted); font-weight: 650; background: #fbfcfe; }
.nowrap { white-space: nowrap; }
.empty { color: var(--muted); text-align: center; padding: 28px; }
.pager { display: flex; justify-content: space-between; color: var(--muted); }
.detail { display: grid; grid-template-columns: 120px 1fr; gap: 8px 12px; }
.detail dt { color: var(--muted); }
.detail dd { margin: 0; overflow-wrap: anywhere; }
.message {
  white-space: pre-wrap;
  background: #111827;
  color: #f9fafb;
  border-radius: 8px;
  padding: 14px;
  overflow-x: auto;
}
.upload { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.actions { display: flex; gap: 10px; align-items: center; }
.actions form { margin: 0; }
.actions button { background: #fff0ee; color: var(--danger); border: 1px solid #ffd7d2; }
.app-panel p { color: var(--muted); }
@media (max-width: 720px) {
  .topbar, nav, .toolbar form, .upload { align-items: stretch; flex-direction: column; }
  .stats { grid-template-columns: 1fr; }
  .container { padding: 12px; }
  .detail { grid-template-columns: 1fr; }
}