:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --border: #e3e5e9;
  --text: #1f2430;
  --text-muted: #6b7280;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --success: #15803d;
  --success-bg: #dcfce7;
  --info: #0369a1;
  --info-bg: #e0f2fe;
  --danger: #b91c1c;
  --danger-bg: #fee2e2;
  --warning: #92400e;
  --warning-bg: #fef3c7;
  --secondary-bg: #eef0f3;
}

* { 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;
}

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

.layout { display: flex; min-height: 100vh; }

.sidebar {
  width: 220px;
  background: #14161d;
  color: #cdd2dc;
  flex-shrink: 0;
  padding: 20px 0;
}

.sidebar .brand {
  padding: 0 20px 20px;
  font-weight: 700;
  letter-spacing: 0.06em;
  font-size: 13px;
  color: #fff;
  border-bottom: 1px solid #2a2d38;
  margin-bottom: 10px;
}

.sidebar nav a {
  display: block;
  padding: 10px 20px;
  color: #b7bdc9;
  font-size: 14px;
}

.sidebar nav a:hover,
.sidebar nav a.active {
  background: #1f2230;
  color: #fff;
}

.main { flex: 1; min-width: 0; }

.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 14px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.topbar h1 { font-size: 16px; margin: 0; font-weight: 600; }
.topbar .admin-name { color: var(--text-muted); font-size: 13px; }

.content { padding: 24px; max-width: 1100px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
}

.card h2 { margin-top: 0; font-size: 15px; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}

.stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
}

.stat .label { font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.03em; }
.stat .value { font-size: 24px; font-weight: 700; margin-top: 4px; }

label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 4px; margin-top: 14px; }
label:first-child { margin-top: 0; }

input[type=text], input[type=email], input[type=password], input[type=tel], input[type=date],
select, textarea {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  background: var(--surface);
  color: var(--text);
}

textarea { resize: vertical; min-height: 100px; }

.btn {
  display: inline-block;
  padding: 9px 16px;
  border-radius: 6px;
  border: 1px solid var(--primary);
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.btn:hover { background: var(--primary-hover); border-color: var(--primary-hover); }
.btn-secondary { background: var(--surface); color: var(--text); border-color: var(--border); }
.btn-secondary:hover { background: var(--secondary-bg); color: var(--text); }

.helper-text { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

.alert { padding: 12px 14px; border-radius: 6px; margin-bottom: 16px; font-size: 13px; }
.alert-success { background: var(--success-bg); color: var(--success); }
.alert-danger { background: var(--danger-bg); color: var(--danger); }
.alert-warning { background: var(--warning-bg); color: var(--warning); }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { color: var(--text-muted); font-weight: 600; font-size: 12px; text-transform: uppercase; }

.badge { display: inline-block; padding: 3px 9px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-info { background: var(--info-bg); color: var(--info); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-secondary { background: var(--secondary-bg); color: var(--text-muted); }

.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
}

.login-card {
  width: 340px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 32px;
}

.login-card h1 { font-size: 18px; margin: 0 0 20px; text-align: center; }

.filters { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; align-items: flex-end; }
.filters > div { flex: 1; min-width: 140px; }

.pagination { display: flex; gap: 6px; margin-top: 16px; }
.pagination a, .pagination span {
  padding: 6px 11px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
}
.pagination .current { background: var(--primary); color: #fff; border-color: var(--primary); }

.kv { display: grid; grid-template-columns: 160px 1fr; row-gap: 10px; font-size: 13px; }
.kv dt { color: var(--text-muted); }
.kv dd { margin: 0; }

.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

.table-responsive { width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* Tablet and below: sidebar becomes a horizontally-scrollable top bar
   instead of a fixed-width side column, so narrow screens don't get
   squeezed into an unusably thin content area. */
@media (max-width: 900px) {
  .layout { flex-direction: column; min-height: 0; }

  .sidebar {
    width: 100%;
    padding: 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .sidebar .brand {
    display: none;
  }

  .sidebar nav {
    display: flex;
    white-space: nowrap;
  }

  .sidebar nav a {
    padding: 14px 16px;
    flex-shrink: 0;
  }

  .main { min-width: 0; }

  .content { padding: 16px; max-width: 100%; }

  .topbar { padding: 12px 16px; }

  .kv { grid-template-columns: 1fr; row-gap: 4px; }
  .kv dt { font-weight: 600; margin-top: 8px; }
  .kv dt:first-child { margin-top: 0; }
}

/* Phones: tighten spacing further and let form/action rows stack. */
@media (max-width: 520px) {
  .content { padding: 12px; }

  .card { padding: 16px; }

  .grid { grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 10px; }

  .stat { padding: 12px; }
  .stat .value { font-size: 20px; }

  .topbar h1 { font-size: 14px; }
  .topbar .admin-name { display: none; }

  .filters { flex-direction: column; align-items: stretch; }
  .filters > div { min-width: 0; }

  .login-card { width: 100%; max-width: 340px; padding: 24px; }

  th, td { padding: 8px; font-size: 12px; }

  .btn { width: 100%; text-align: center; margin-bottom: 8px; }
}