:root {
  --bg: #f5f7fa;
  --panel: #ffffff;
  --text: #1f2933;
  --muted: #7b8794;
  --border: #e4e9ee;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --danger: #dc2626;
  --ok-bg: #e7f7ed;
  --ok-fg: #15803d;
  --fail-bg: #fdecec;
  --fail-fg: #b91c1c;
  --off-bg: #eef1f4;
  --off-fg: #64748b;
}

* { box-sizing: border-box; }

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

/* top bar */
.topbar {
  display: flex;
  align-items: center;
  gap: 32px;
  background: #111827;
  color: #fff;
  padding: 0 24px;
  height: 52px;
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar .brand { font-weight: 700; font-size: 16px; white-space: nowrap; }
.topbar nav { display: flex; gap: 4px; flex: 1; }
.topbar nav a {
  color: #cbd5e1;
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 6px;
}
.topbar nav a:hover { background: #1f2937; color: #fff; }
.topbar nav a.active { background: var(--primary); color: #fff; }
.topbar .user { display: flex; align-items: center; gap: 10px; color: #cbd5e1; }

.container { max-width: 1200px; margin: 24px auto 60px; padding: 0 24px; }

h2 { margin: 4px 0 16px; font-size: 20px; }
h3 { margin: 0 0 12px; font-size: 15px; }

/* cards */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 28px; }
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
}
.card-num { font-size: 26px; font-weight: 700; }
.card-label { color: var(--muted); margin-top: 4px; }

/* panel & forms */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 28px;
}
.panel.narrow { max-width: 420px; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; }
label { display: block; font-size: 13px; color: var(--text); margin-bottom: 6px; }
input[type=text], input[type=password], input[type=number], input[type=datetime-local], select {
  width: 100%;
  margin-top: 4px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  background: #fff;
  color: var(--text);
}
input:focus, select:focus { outline: 2px solid rgba(37, 99, 235, .25); border-color: var(--primary); }
.checkbox { display: flex; align-items: center; gap: 8px; margin: 12px 0; }
.checkbox input { width: auto; }
.actions { margin-top: 14px; display: flex; gap: 10px; align-items: center; }

/* buttons */
.btn {
  display: inline-block;
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { background: #f1f5f9; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-primary[disabled] { opacity: .5; cursor: not-allowed; }
.btn-danger { color: var(--danger); border-color: #f3c4c4; }
.btn-danger:hover { background: var(--fail-bg); }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-block { width: 100%; }
.btn-link { background: none; border: none; color: #93c5fd; cursor: pointer; padding: 0; font-size: 13px; }
.btn-link:hover { text-decoration: underline; }

/* tables */
table {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
thead th { background: #f8fafc; font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .03em; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: #f8fafc; }
.sql-cell { max-width: 360px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-family: ui-monospace, Consolas, monospace; font-size: 12.5px; }
.actions-cell { display: flex; gap: 6px; flex-wrap: wrap; }
.actions-cell form { margin: 0; }

/* tags & flash */
.tag { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; }
.tag-ok { background: var(--ok-bg); color: var(--ok-fg); }
.tag-fail { background: var(--fail-bg); color: var(--fail-fg); }
.tag-off { background: var(--off-bg); color: var(--off-fg); }
.flash { padding: 12px 16px; border-radius: 8px; margin-bottom: 18px; word-break: break-all; }
.flash-info { background: var(--ok-bg); color: var(--ok-fg); border: 1px solid #bbe3c9; }
.flash-error { background: var(--fail-bg); color: var(--fail-fg); border: 1px solid #f3c4c4; }

.muted { color: var(--muted); }
.small { font-size: 12px; }
.text-danger { color: var(--danger); }
code { background: #f1f5f9; padding: 1px 5px; border-radius: 4px; font-size: 12px; }

/* pagination */
.pagination { display: flex; gap: 14px; align-items: center; margin-top: 16px; }
.filter-form { display: flex; gap: 14px; flex-wrap: wrap; align-items: flex-end; }
.filter-form label { margin: 0; min-width: 140px; }

/* login */
.login-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: #111827; }
.login-card {
  background: #fff;
  border-radius: 12px;
  padding: 36px 32px;
  width: 340px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, .35);
}
.login-card h1 { font-size: 18px; margin: 0 0 4px; }
.login-card form label { margin-top: 14px; }
.login-card .btn { margin-top: 20px; }