:root {
  --bg: #f4f6fb;
  --surface: #ffffff;
  --fg: #1c2333;
  --muted: #66708a;
  --border: #dde3ef;
  --accent: #2563eb;
  --accent-fg: #ffffff;
  --success: #0f8a4b;
  --warning: #b45309;
  --error: #d92d20;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .08);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code, .mono {
  font-family: ui-monospace, "Cascadia Code", Consolas, Menlo, monospace;
  font-size: .92em;
  background: rgba(37, 99, 235, .07);
  border-radius: 4px;
  padding: 1px 5px;
}
.mono { background: none; padding: 0; }

/* topbar */
.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.topbar-inner {
  max-width: 1080px; margin: 0 auto; padding: 0 20px;
  display: flex; align-items: center; gap: 22px; height: 56px;
}
.brand { font-weight: 700; color: var(--fg); white-space: nowrap; }
.brand:hover { text-decoration: none; }
.nav { display: flex; gap: 4px; flex: 1; flex-wrap: wrap; }
.nav a {
  color: var(--muted); padding: 6px 12px; border-radius: 8px; font-weight: 500;
}
.nav a:hover { color: var(--fg); background: var(--bg); text-decoration: none; }
.nav a.active { color: var(--accent); background: rgba(37, 99, 235, .09); }
.topbar-right { display: flex; align-items: center; gap: 10px; }

/* layout */
.wrap { max-width: 1080px; width: 100%; margin: 0 auto; padding: 26px 20px 40px; flex: 1; }
.wrap-narrow { max-width: 460px; }
.auth-wrap { display: flex; align-items: center; justify-content: center; }
.auth-card { width: 100%; }
.footer {
  text-align: center; color: var(--muted); font-size: 13px;
  padding: 18px; border-top: 1px solid var(--border); background: var(--surface);
}
.page-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 14px; margin: 4px 0 18px; flex-wrap: wrap;
}
.page-head h1 { margin: 0; font-size: 24px; }

/* cards */
.cards {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px; margin-bottom: 18px;
}
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 18px 20px; margin-bottom: 18px;
}
.card h2 { margin: 0 0 12px; font-size: 17px; }
.card.stat { margin-bottom: 0; text-align: center; padding: 16px; }
.stat-num { font-size: 30px; font-weight: 700; }
.stat-num .muted { font-size: 14px; font-weight: 400; }
.stat-label { color: var(--muted); font-size: 13px; }

/* forms */
label { display: block; font-weight: 500; font-size: 14px; }
label input[type="text"], label input[type="password"], label input[type="number"],
label select, textarea, .filters select {
  display: block; width: 100%; margin-top: 5px;
  padding: 9px 11px; font: inherit; color: var(--fg);
  background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
}
textarea { resize: vertical; font-family: ui-monospace, Consolas, monospace; font-size: 13px; }
input:focus, select:focus, textarea:focus {
  outline: 2px solid rgba(37, 99, 235, .35); border-color: var(--accent);
}
.grid-form .form-row {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px; margin-bottom: 14px;
}
.grid-form label { margin-bottom: 0; }
.grid-form > label { margin-bottom: 14px; }
.form-actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 4px; }
.check-label { display: flex !important; align-items: center; gap: 8px; }
.check-label input[type="checkbox"] { width: auto; margin: 0; }
.check-label input[type="number"] { width: 80px; display: inline-block; margin: 0; }
.input-group { display: flex; gap: 8px; margin-top: 5px; }
.input-group input { flex: 1; margin-top: 0; }
.filters { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 14px; }
.filters select { width: auto; margin: 0; }

/* buttons */
.btn {
  display: inline-block; padding: 9px 16px; font: inherit; font-weight: 600; font-size: 14px;
  color: var(--fg); background: var(--surface);
  border: 1px solid var(--border); border-radius: 8px; cursor: pointer;
}
.btn:hover { background: var(--bg); text-decoration: none; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); }
.btn-primary:hover { background: #1d4fd7; }
.btn-primary:disabled { opacity: .55; cursor: not-allowed; }
.btn-danger { color: var(--error); border-color: rgba(217, 45, 32, .4); }
.btn-danger:hover { background: rgba(217, 45, 32, .07); }
.btn-ghost { border-color: transparent; background: transparent; color: var(--muted); }
.btn-ghost:hover { color: var(--fg); background: var(--bg); }
.btn-sm { padding: 5px 10px; font-size: 13px; }
.btn-block { width: 100%; }

/* tables */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
tr:last-child td { border-bottom: none; }
tbody tr:hover, tr:hover td { background: rgba(37, 99, 235, .035); }
.url-cell { max-width: 340px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.url-cell span { cursor: default; }
.nowrap { white-space: nowrap; }
.checks { white-space: nowrap; }
.checks .btn { margin: 1px 0; }
.check-msg { display: block; max-width: 360px; white-space: normal; margin-top: 4px; }
.inline { display: inline; }

/* badges & text states */
.badge {
  display: inline-block; padding: 2px 9px; border-radius: 999px;
  font-size: 12px; font-weight: 600;
  background: rgba(37, 99, 235, .1); color: var(--accent);
}
.badge-ok { background: rgba(15, 138, 75, .12); color: var(--success); }
.badge-err { background: rgba(217, 45, 32, .1); color: var(--error); }
.badge-off { background: rgba(102, 112, 138, .12); color: var(--muted); }
.ok-text { color: var(--success); font-size: 13px; }
.err-text { color: var(--error); font-size: 13px; }
.muted { color: var(--muted); }
.hint { color: var(--muted); font-size: 13px; margin: 6px 0; }

/* flash */
.flash {
  padding: 11px 14px; border-radius: 8px; margin-bottom: 14px; font-size: 14px;
  border: 1px solid var(--border); background: var(--surface);
}
.flash-ok { border-color: rgba(15, 138, 75, .35); background: rgba(15, 138, 75, .07); }
.flash-err { border-color: rgba(217, 45, 32, .35); background: rgba(217, 45, 32, .06); color: var(--error); }

/* pager */
.pager { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 14px; }
.pager a, .pager strong {
  padding: 4px 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px;
}
.pager strong { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); }
.pager a { color: var(--fg); }
.pager a:hover { background: var(--bg); text-decoration: none; }

@media (max-width: 640px) {
  .topbar-inner { height: auto; padding: 10px 14px; flex-wrap: wrap; gap: 8px; }
  .nav { order: 3; width: 100%; }
  .wrap { padding: 18px 14px 30px; }
}