:root {
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --secondary-color: #64748b;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --background-color: #f8fafc;
  --card-bg: #ffffff;
  --sidebar-bg: #1e293b;
  --sidebar-text: #f1f5f9;
  --text-main: #1e293b;
  --text-muted: #64748b;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--background-color);
  color: var(--text-main);
  overflow-x: hidden;
  margin: 0;
}

/* Sidebar Styles */
.sidebar {
  width: 260px;
  height: 100vh;
  position: fixed;
  left: 0;
  top: 0;
  background-color: var(--sidebar-bg);
  color: var(--sidebar-text);
  padding: 1.5rem;
  z-index: 1000;
  display: flex;
  flex-direction: column;
}

.sidebar-brand {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 2.5rem;
  display: flex;
  align-items: center;
  color: #fff;
  text-decoration: none;
}

.sidebar-brand i {
  margin-right: 0.75rem;
  color: var(--primary-color);
}

.nav-menu {
  flex-grow: 1;
}

.nav-link {
  color: #94a3b8;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  margin-bottom: 0.25rem;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  text-decoration: none;
}

.nav-link:hover, .nav-link.active {
  background-color: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.nav-link i {
  width: 20px;
  margin-right: 0.75rem;
}

/* Main Content Area */
.main-content {
  margin-left: 260px;
  padding: 2rem;
  min-height: 100vh;
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

/* Card Styles */
.stat-card {
  background: var(--card-bg);
  border-radius: 1rem;
  padding: 1.5rem;
  border: 1px solid #e2e8f0;
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
  transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.icon-blue { background: #dbeafe; color: #1e40af; }
.icon-green { background: #dcfce7; color: #166534; }
.icon-orange { background: #fef3c7; color: #92400e; }
.icon-red { background: #fee2e2; color: #991b1b; }

/* Date Badge */
.date-badge {
    background: #fff;
    padding: 0.5rem 1rem;
    border-radius: 0.75rem;
    font-size: 0.875rem;
    border: 1px solid #e2e8f0;
    display: flex;
    gap: 1rem;
    font-weight: 500;
}

/* Table Styles */
.table-card {
    background: white;
    border-radius: 1rem;
    overflow: hidden;
    border: 1px solid #e2e8f0;
}

.table thead th {
    background-color: #f8fafc;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid #e2e8f0;
}

.table tbody td {
    padding: 1rem 1.5rem;
    vertical-align: middle;
}

/* Status Badges */
.status-pill {
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-present { background-color: #dcfce7; color: #166534; }
.badge-absent { background-color: #fee2e2; color: #991b1b; }
.badge-late { background-color: #fef3c7; color: #92400e; }
.badge-leave { background-color: #dbeafe; color: #1e40af; }

/* Buttons */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
}