:root {
    --primary-color: #1565C0;
    --primary-light: #E3F2FD;
    --primary-dark: #0D47A1;
    --bg-color: #F5F7FA;
    --card-bg: #FFFFFF;
    --text-main: #333333;
    --text-muted: #666666;
    --border-color: #E0E0E0;
    
    --success: #2E7D32;
    --warning: #F57C00;
    --danger: #C62828;
    
    --sidebar-width: 250px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Sarabun', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
}

#app {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--primary-color);
    color: white;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
}

.logo {
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.nav-links {
    list-style: none;
    flex-grow: 1;
    padding: 20px 0;
}

.nav-item {
    display: block;
    padding: 15px 20px;
    color: white;
    text-decoration: none;
    transition: background 0.3s;
}

.nav-item:hover, .nav-item.active {
    background-color: var(--primary-dark);
}

.user-info {
    padding: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.content {
    flex-grow: 1;
    margin-left: var(--sidebar-width);
    padding: 30px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

/* Cards & Grid */
.stats-grid, .report-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.stat-card, .card {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.stat-card h3 {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 10px;
}

.stat-card p {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

/* Tables */
.table-container {
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th, .table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background-color: #FAFAFA;
    font-weight: 600;
}

/* Badges */
.badge {
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: bold;
}

.badge-admin { background: #FFCDD2; color: #C62828; }
.badge-staff { background: #BBDEFB; color: #1565C0; }
.badge-guest { background: #E0E0E0; color: #424242; }

.badge-pending { background: #FFE0B2; color: #E65100; }
.badge-progress { background: #BBDEFB; color: #1565C0; }
.badge-resolved { background: #C8E6C9; color: #1B5E20; }

.badge-fast { background: #C8E6C9; color: #1B5E20; }
.badge-medium { background: #FFE0B2; color: #E65100; }
.badge-slow { background: #FFCDD2; color: #C62828; }

/* Buttons */
.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: opacity 0.3s;
}
.btn:hover { opacity: 0.9; }
.btn-primary { background: var(--primary-color); color: white; }
.btn-outline { background: transparent; border: 1px solid white; color: white; }

/* Forms */
.form-group {
    margin-bottom: 15px;
}
.form-group label {
    display: block;
    margin-bottom: 5px;
}
.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

/* Utilities */
.mt-4 { margin-top: 1.5rem; }
.hidden { display: none !important; }

/* Drag and drop */
.drop-zone {
    border: 2px dashed var(--border-color);
    padding: 40px;
    text-align: center;
    background: #FAFAFA;
    cursor: pointer;
    border-radius: 8px;
}
.drop-zone.dragover { background: var(--primary-light); }

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0; top: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.5);
}
.modal-content {
    background: white;
    margin: 10% auto;
    padding: 20px;
    width: 50%;
    border-radius: 8px;
}
.close-btn {
    float: right;
    font-size: 24px;
    cursor: pointer;
}

/* Switch */
.switch {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 24px;
}
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: #ccc;
  transition: .4s;
}
.slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  transition: .4s;
}
input:checked + .slider { background-color: var(--primary-color); }
input:checked + .slider:before { transform: translateX(26px); }
.slider.round { border-radius: 24px; }
.slider.round:before { border-radius: 50%; }
.toggle-container { display: flex; align-items: center; gap: 10px; }