:root {
  --bg: #f7f8fa;
  --card: #fff;
  --line: #e4e8ed;
  --ink: #16202b;
  --muted: #5a6675;
  --accent: #0d9488;
  --accent-d: #0a6b62;
  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --danger-line: #fecaca;
  --warn: #b45309;
  --warn-bg: #fffbeb;
  --add-bg: #e6ffed;
  --add-ink: #22863a;
  --del-bg: #ffeef0;
  --del-ink: #b31d28;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* --- Topbar / layout --- */
.topbar {
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); }
.brand:hover { text-decoration: none; }
.logo {
  width: 30px; height: 30px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-d));
  display: grid; place-items: center; color: #fff; font-weight: 700; font-size: 15px;
}
nav { display: flex; align-items: center; gap: 18px; font-size: 14px; }
nav a.active { color: var(--ink); font-weight: 600; }
.link-btn {
  background: none; border: none; color: var(--muted); font: inherit;
  cursor: pointer; padding: 0;
}
.link-btn:hover { color: var(--danger); text-decoration: underline; }

.container { max-width: 1000px; margin: 0 auto; padding: 28px 24px 60px; }

h1 { font-size: 22px; margin: 0 0 16px; }
h2 { font-size: 16px; margin: 28px 0 12px; color: var(--muted); }

.empty { color: var(--muted); }

/* --- Table --- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}
.data-table th, .data-table td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}
.data-table th { color: var(--muted); font-weight: 600; font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.03em; }
.data-table tr:last-child td { border-bottom: none; }
.actions { text-align: right; }

/* --- Status / tags / badges --- */
.status { font-size: 12.5px; font-weight: 600; padding: 2px 8px; border-radius: 999px; }
.status-ok { background: var(--add-bg); color: var(--add-ink); }
.status-error { background: var(--del-bg); color: var(--del-ink); }
.status-changed { background: var(--warn-bg); color: var(--warn); }
.status-pending { background: #eef2f7; color: var(--muted); }

.badge {
  background: var(--warn); color: #fff; font-size: 11.5px; font-weight: 600;
  padding: 2px 8px; border-radius: 999px; margin-left: 8px;
}

.tag { font-size: 11px; font-weight: 600; padding: 2px 7px; border-radius: 6px; margin-left: 6px; }
.tag-change { background: var(--warn-bg); color: var(--warn); }
.tag-baseline { background: #eef2f7; color: var(--muted); }
.tag-unseen { background: var(--del-bg); color: var(--del-ink); }

/* --- Forms --- */
.form-card, .actions-bar {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 20px;
}
.form-card { max-width: 480px; }
label { display: block; font-size: 12.5px; font-weight: 600; color: var(--muted); margin: 14px 0 6px; }
label:first-of-type { margin-top: 0; }
input, select {
  width: 100%; border: 1px solid var(--line); border-radius: 8px;
  padding: 9px 11px; font-size: 14px; font-family: inherit;
}
input:focus, select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.12); }
fieldset { border: 1px dashed var(--line); border-radius: 8px; margin: 14px 0 0; padding: 4px 14px 14px; }
legend { font-size: 12px; color: var(--muted); padding: 0 6px; }

.btn {
  border: 1px solid var(--line); border-radius: 8px; background: #fff; color: var(--ink);
  padding: 8px 14px; font-size: 14px; font-weight: 600; cursor: pointer; font-family: inherit;
}
.btn:hover { background: #f0f2f5; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-sm { padding: 5px 10px; font-size: 12.5px; }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-d); }
.btn-danger { color: var(--danger); border-color: var(--danger-line); }
.btn-danger:hover { background: var(--danger-bg); }

.actions-bar { display: flex; gap: 10px; align-items: center; margin-bottom: 8px; }
.actions-bar form { margin: 0; }

.error-box {
  background: var(--danger-bg); border: 1px solid var(--danger-line); color: var(--danger);
  font-size: 13.5px; padding: 10px 12px; border-radius: 8px; margin-bottom: 16px;
}

.meta { color: var(--muted); font-size: 13.5px; margin: 4px 0; }
.meta code { background: #eef2f7; padding: 1px 6px; border-radius: 5px; font-size: 12.5px; }

/* --- Diff rendering --- */
.snapshot {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  margin-bottom: 16px; overflow: hidden;
}
.snapshot-header {
  padding: 8px 14px; border-bottom: 1px solid var(--line); font-size: 13px; color: var(--muted);
  display: flex; align-items: center; gap: 4px;
}
.baseline-note { padding: 12px 14px; color: var(--muted); font-size: 13px; margin: 0; }
.diff-block {
  margin: 0; padding: 8px 0; overflow-x: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12.5px; line-height: 1.55;
}
.diff-line { padding: 0 14px; white-space: pre; }
.diff-line.diff-add { background: var(--add-bg); color: var(--add-ink); }
.diff-line.diff-del { background: var(--del-bg); color: var(--del-ink); }
.diff-line.diff-hunk { background: #f1f8ff; color: #0969da; }
.diff-line.diff-file { color: var(--muted); font-weight: 600; }

/* --- Login page --- */
.login-body { display: grid; place-items: center; padding: 24px; }
.login-card { width: 100%; max-width: 400px; box-shadow: 0 8px 30px rgba(20, 32, 43, 0.06); }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 32px 28px;
}
.sub { color: var(--muted); font-size: 13px; margin-bottom: 24px; padding-left: 40px; }
.hint { color: var(--muted); font-size: 13.5px; line-height: 1.55; margin-bottom: 22px; }
.err {
  background: var(--danger-bg); border: 1px solid var(--danger-line); color: var(--danger);
  font-size: 13px; padding: 10px 12px; border-radius: 8px; margin-bottom: 16px;
}
.hidden { display: none !important; }
.foot { margin-top: 20px; font-size: 11.5px; color: var(--muted); text-align: center; line-height: 1.6; }