:root {
  --bg: #f3f4f7;
  --panel: #ffffff;
  --border: #e3e6ea;
  --border-strong: #d3d7dd;
  --text: #1a1d23;
  --muted: #70757e;
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --primary-bg: #eef0fe;
  --danger: #dc2626;
  --danger-dark: #b91c1c;
  --danger-bg: #fef2f2;
  --sidebar-bg: #181b25;
  --sidebar-text: #cfd2db;
  --sidebar-text-dim: #8a8f9c;
  --sidebar-active: #2a2f3d;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 2px rgba(16,24,40,.04), 0 1px 3px rgba(16,24,40,.06);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }

/* ---------- App shell / sidebar ---------- */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
  width: 250px;
  flex-shrink: 0;
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  padding: 18px 14px;
  position: sticky;
  top: 0;
  height: 100vh;
}
.sidebar-brand {
  font-weight: 700;
  font-size: 17px;
  color: #fff;
  text-decoration: none;
  padding: 4px 4px 16px;
  display: block;
}
.sidebar-new-btn { margin-bottom: 10px; }
.sidebar-search {
  width: 100%;
  background: #23273400;
  border: 1px solid #33384a;
  background: #1f2330;
  color: #fff;
  border-radius: var(--radius-sm);
  padding: 7px 10px;
  font-size: 13px;
  margin-bottom: 8px;
}
.sidebar-search::placeholder { color: var(--sidebar-text-dim); }
.table-nav {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-top: 4px;
}
.table-nav-link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--sidebar-text);
  font-size: 13px;
}
.table-nav-link:hover { background: #21252f; color: #fff; }
.table-nav-link.active { background: var(--sidebar-active); color: #fff; font-weight: 600; }
.table-nav-link .tname { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.table-nav-link .tcount { font-size: 11px; color: var(--sidebar-text-dim); flex-shrink: 0; }
.sidebar-empty { padding: 6px 10px; font-size: 12px; }
.sidebar-logout { margin-top: 10px; padding-top: 10px; border-top: 1px solid #262a36; }
.sidebar-logout .link-btn { color: var(--sidebar-text-dim); }
.sidebar-logout .link-btn:hover { color: #fff; }

.main-content { flex: 1; min-width: 0; padding: 28px 34px 60px; }

/* ---------- Headings / layout helpers ---------- */
.page-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; flex-wrap: wrap; gap: 10px; }
h1 { font-size: 22px; margin: 0; letter-spacing: -.01em; }
h2 { font-size: 16px; margin: 0; }
h3 { font-size: 13px; color: var(--muted); margin: 16px 0 8px; text-transform: uppercase; letter-spacing: .03em; }
.muted { color: var(--muted); font-weight: 400; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  transition: background .12s, border-color .12s;
}
.btn:hover { background: #f5f6f8; border-color: #c4c8cf; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); }
.btn-danger { background: var(--danger-bg); border-color: #f3c8c8; color: var(--danger); }
.btn-danger:hover { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-danger:disabled, .btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-small { padding: 5px 10px; font-size: 12.5px; }
.btn-block { width: 100%; justify-content: center; }
.link-btn { background: none; border: none; cursor: pointer; font-size: 13px; padding: 4px 6px; }

/* ---------- Panels / cards ---------- */
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 18px; margin-bottom: 16px; box-shadow: var(--shadow); }
.panel summary { cursor: pointer; font-weight: 600; font-size: 13.5px; color: var(--text); outline: none; }
.panel summary::marker { color: var(--primary); }

.stat-cards { display: flex; gap: 14px; margin-bottom: 22px; }
.stat-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 22px; box-shadow: var(--shadow); min-width: 150px; }
.stat-value { font-size: 26px; font-weight: 700; letter-spacing: -.02em; }
.stat-label { font-size: 12.5px; color: var(--muted); margin-top: 2px; }

.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.table-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 18px; text-decoration: none; color: var(--text); box-shadow: var(--shadow);
  transition: border-color .12s, transform .12s;
}
.table-card:hover { border-color: var(--primary); transform: translateY(-1px); }
.table-card-name { font-weight: 600; font-size: 14.5px; margin-bottom: 4px; word-break: break-word; }
.table-card-count { font-size: 12.5px; color: var(--muted); }

/* ---------- Tables (schema/list style) ---------- */
.list-table { width: 100%; border-collapse: collapse; background: var(--panel); border-radius: var(--radius); overflow: hidden; }
.list-table th, .list-table td { padding: 10px 12px; border-bottom: 1px solid var(--border); text-align: left; font-size: 13.5px; }
.list-table.small th, .list-table.small td { padding: 6px 8px; font-size: 12.5px; }
.list-table th { background: #fafbfc; font-weight: 600; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .02em; }
.list-table tbody tr:hover { background: #fafbff; }
.null-badge { color: var(--muted); font-style: italic; font-size: 11px; margin-left: 4px; }

/* ---------- Data table: sticky header + scroll both ways ---------- */
.data-toolbar { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; margin: 26px 0 12px; }
.search-bar { display: flex; gap: 6px; align-items: center; }
.search-bar input[type=text] { min-width: 220px; }

.table-scroll-wrap {
  max-height: 65vh;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  background: var(--panel);
}
.data-table { border-radius: 0; }
.data-table thead th {
  position: sticky;
  top: 0;
  z-index: 2;
  background: #f7f8fa;
  border-bottom: 1px solid var(--border-strong);
  white-space: nowrap;
}
.data-table tbody td { white-space: nowrap; }
.data-table tbody tr:nth-child(even) { background: #fbfbfd; }
.col-actions-head { position: sticky; top: 0; right: 0; }
.sort-link { text-decoration: none; color: var(--muted); display: inline-block; }
.sort-link:hover { color: var(--text); }
.sort-link.active { color: var(--primary); }
.sort-arrow { font-size: 10px; }

/* ---------- Forms ---------- */
.inline-form { display: inline-flex; gap: 6px; align-items: center; margin: 2px 6px 2px 0; }
.actions-cell { display: flex; flex-wrap: wrap; gap: 6px; }
.row-form { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-top: 8px; }
.stacked-form { display: flex; flex-direction: column; gap: 12px; max-width: 540px; background: var(--panel); padding: 22px; border-radius: var(--radius); border: 1px solid var(--border); box-shadow: var(--shadow); }
.field-row { display: flex; flex-direction: column; gap: 4px; }
.field-row label { font-size: 12.5px; font-weight: 600; color: #444; }
.col-def-row { display: flex; gap: 8px; align-items: center; margin-bottom: 8px; flex-wrap: wrap; }

input[type=text], input[type=password], input[type=date], select, textarea {
  padding: 7px 10px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-family: inherit;
  background: #fff;
  color: var(--text);
}
input[type=text]:focus, input[type=password]:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-bg);
}
.checkbox-label { font-size: 12.5px; display: inline-flex; align-items: center; gap: 4px; }
.checkbox-label.small { font-size: 11.5px; color: var(--muted); }

.alert { padding: 10px 14px; border-radius: var(--radius-sm); margin-bottom: 14px; font-size: 13.5px; }
.alert-error { background: var(--danger-bg); color: var(--danger-dark); border: 1px solid #f3c8c8; }

/* ---------- Pagination ---------- */
.pagination { display: flex; gap: 6px; margin-top: 14px; flex-wrap: wrap; }
.pagination a { padding: 5px 11px; border: 1px solid var(--border-strong); border-radius: var(--radius-sm); text-decoration: none; color: var(--text); font-size: 12.5px; background: var(--panel); }
.pagination a:hover { border-color: var(--primary); }
.pagination a.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ---------- Login ---------- */
.login-body { display: flex; align-items: center; justify-content: center; height: 100vh; background: linear-gradient(160deg, #181b25, #2c3145); }
.login-box { background: var(--panel); padding: 34px; border-radius: 14px; border: 1px solid var(--border); width: 320px; display: flex; flex-direction: column; gap: 10px; box-shadow: 0 20px 40px rgba(0,0,0,.25); }
.login-box h1 { text-align: center; margin-bottom: 14px; font-size: 20px; }
.login-box label { font-size: 12.5px; font-weight: 600; color: #444; margin-bottom: -4px; }

@media (max-width: 780px) {
  .app-shell { flex-direction: column; }
  .sidebar { width: 100%; height: auto; position: relative; }
  .table-nav { max-height: 160px; }
  .main-content { padding: 20px; }
}