:root {
  --bg: #eef1f4;
  --sidebar: #1f2430;
  --sidebar-hover: #2a3140;
  --text: #2c3340;
  --muted: #6b7280;
  --border: #e2e8f0;
  --primary: #444444;
  --primary-hover: #666666;
  --accent: #007dc6;
  --success: #008a06;
  --warning: #f1a500;
  --error: #cc4749;
  --card: #ffffff;
  --radius: 10px;
  --shadow: 0 8px 24px rgba(31, 36, 48, 0.06);
  --font-heading: "Montserrat", Arial, Helvetica, sans-serif;
  --font-body: "Karla", Arial, Helvetica, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  display: flex;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

.sidebar {
  width: 250px;
  background: linear-gradient(180deg, #232937 0%, #1a1f2b 100%);
  color: #fff;
  padding: 1.25rem 0;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  flex-shrink: 0;
}
.brand {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: .4px;
  padding: 0 1.25rem 1.1rem;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.brand small {
  display: block;
  margin-top: .25rem;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 12px;
  color: #9aa3b5;
  letter-spacing: 0;
}
.sidebar nav {
  display: flex;
  flex-direction: column;
  padding: .85rem .65rem;
  flex: 1;
  overflow: auto;
  gap: .15rem;
}
.sidebar a {
  color: #c9d0dc;
  text-decoration: none;
  padding: .7rem .85rem;
  font-size: 14px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: .55rem;
}
.sidebar a:hover {
  background: var(--sidebar-hover);
  color: #fff;
  text-decoration: none;
}
.sidebar a.active {
  background: #444;
  color: #fff;
  font-weight: 600;
}
.nav-section {
  margin: .65rem .85rem .25rem;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: #7f889a;
}
.logout {
  padding: 1rem 1.25rem;
  border-top: 1px solid rgba(255,255,255,.08);
}
.logout button {
  width: 100%;
  background: transparent;
  border: 1px solid rgba(255,255,255,.25);
  color: #fff;
  padding: .6rem;
  cursor: pointer;
  border-radius: 8px;
}
.logout button:hover { background: rgba(255,255,255,.08); }

.content {
  flex: 1;
  padding: 1.5rem 2rem 2.5rem;
  min-width: 0;
}
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.25rem;
}
.page-header p {
  margin: .35rem 0 0;
  color: var(--muted);
  font-size: 14px;
}

.login-wrap {
  width: 100%;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background:
    radial-gradient(circle at top right, rgba(0,125,198,.12), transparent 40%),
    linear-gradient(160deg, #eef1f4, #e4e8ee);
}
.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 2rem;
  box-shadow: var(--shadow);
}
.login-card h1 { margin-top: 0; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
}
.table-card { padding: 0; overflow: hidden; }

h1, h2, h3 {
  font-family: var(--font-heading);
  color: #444;
  font-weight: 600;
  margin: 0 0 .75rem;
}
h1 { font-size: 1.6rem; }
h2 { font-size: 1.15rem; }

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.stat {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.15rem;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}
.stat::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 3px;
  background: var(--primary);
}
.stat:nth-child(2)::after { background: var(--accent); }
.stat:nth-child(3)::after { background: var(--warning); }
.stat:nth-child(4)::after { background: var(--success); }
.stat .label { color: var(--muted); font-size: 13px; }
.stat .value {
  font-family: var(--font-heading);
  font-size: 1.7rem;
  font-weight: 700;
  margin-top: .4rem;
  color: #333;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
}
th, td {
  border-bottom: 1px solid var(--border);
  padding: .85rem 1rem;
  text-align: left;
  font-size: 14px;
  vertical-align: middle;
}
th {
  background: #f8fafc;
  color: #444;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .04em;
}
tr:hover td { background: #fafbfc; }
.table-actions {
  display: flex;
  gap: .4rem;
  flex-wrap: wrap;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .35rem;
  background: var(--primary);
  color: #fff !important;
  border: 0;
  padding: .55rem 1rem;
  text-decoration: none !important;
  cursor: pointer;
  font-size: 14px;
  border-radius: 8px;
  line-height: 1.2;
}
.btn:hover { background: var(--primary-hover); }
.btn-secondary { background: #6b7280; }
.btn-secondary:hover { background: #4b5563; }
.btn-danger { background: var(--error); }
.btn-danger:hover { background: #b33b3d; }
.btn-accent { background: var(--accent); }
.btn-sm { padding: .35rem .65rem; font-size: 12px; }
.btn-outline {
  background: #fff;
  color: var(--primary) !important;
  border: 1px solid var(--border);
}
.btn-outline:hover { background: #f8fafc; }

.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  gap: 1rem;
  flex-wrap: wrap;
}
.filter-bar {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 1rem;
}
.filter-bar input,
.filter-bar select {
  padding: .55rem .7rem;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  background: #fff;
  min-width: 160px;
}

form.stack label {
  display: block;
  margin: .85rem 0 .3rem;
  font-size: 13px;
  color: #444;
  font-weight: 600;
}
form.stack input,
form.stack textarea,
form.stack select {
  width: 100%;
  max-width: 680px;
  padding: .65rem .75rem;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  background: #fff;
}
form.stack input:focus,
form.stack textarea:focus,
form.stack select:focus {
  outline: 2px solid rgba(0,125,198,.25);
  border-color: var(--accent);
}
.checkbox-row {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem 1.25rem;
  margin: .85rem 0;
}
.checkbox-row label {
  display: inline-flex !important;
  align-items: center;
  gap: .4rem;
  font-weight: 400 !important;
  margin: 0 !important;
}

.alert {
  padding: .85rem 1rem;
  margin-bottom: 1rem;
  border-radius: 8px;
}
.alert.success { background: #d5ffd8; color: var(--success); }
.alert.error { background: #fdd; color: var(--error); }
.alert ul { margin: 0; padding-left: 1.1rem; }

.badge {
  display: inline-block;
  padding: .2rem .55rem;
  background: #eef2f7;
  color: #475569;
  font-size: 12px;
  border-radius: 999px;
  font-weight: 600;
}
.badge-success { background: #d5ffd8; color: var(--success); }
.badge-warning { background: #fff4d6; color: #9a6b00; }
.badge-danger { background: #fdd; color: var(--error); }
.badge-info { background: #e0f2fe; color: var(--accent); }

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  max-width: 680px;
}
.muted { color: var(--muted); }
.thumb {
  width: 42px;
  height: 42px;
  object-fit: contain;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
}

.pagination {
  display: flex;
  gap: .35rem;
  list-style: none;
  padding: 1rem;
  margin: 0;
  flex-wrap: wrap;
}
.pagination li a,
.pagination li span {
  display: block;
  padding: .4rem .7rem;
  border: 1px solid var(--border);
  background: #fff;
  text-decoration: none;
  color: var(--text);
  border-radius: 6px;
}
.pagination li.active span {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

@media (max-width: 1100px) {
  .stats { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 800px) {
  body { flex-direction: column; }
  .sidebar {
    width: 100%;
    height: auto;
    position: relative;
  }
  .sidebar nav { flex-direction: row; flex-wrap: wrap; }
  .content { padding: 1rem; }
  .grid-2 { grid-template-columns: 1fr; }
}