* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', sans-serif;
    background: #F5F5F5;
    color: #212121;
}

/* Header */
.header {
    background: #2196F3;
    color: white;
    padding: 20px 30px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    font-size: 24px;
    font-weight: 500;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-avatar {
    width: 40px;
    height: 40px;
    background: #1976D2;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    font-size: 14px;
}

.logout-btn {
    color: white;
    text-decoration: none;
    padding: 8px;
    border-radius: 6px;
    transition: background 0.2s;
}

.logout-btn:hover {
    background: rgba(255,255,255,0.2);
}

/* Sidebar */
.sidebar {
    width: 240px;
    background: white;
    min-height: calc(100vh - 70px);
    box-shadow: 2px 0 8px rgba(0,0,0,0.05);
    position: fixed;
    left: 0;
    top: 70px;
}

.sidebar-content {
    padding: 20px 0;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 24px;
    color: #424242;
    text-decoration: none;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: #F5F5F5;
    color: #2196F3;
}

.nav-item.active {
    background: #E3F2FD;
    color: #2196F3;
    border-left-color: #2196F3;
    font-weight: 500;
}

.nav-item .material-icons {
    font-size: 24px;
}

/* Main Content */
.main-content {
    margin-left: 240px;
    padding: 30px;
    min-height: calc(100vh - 70px);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

/* Cards */
.card {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    margin-bottom: 25px;
}

.card-title {
    font-size: 20px;
    font-weight: 500;
    color: #212121;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-title .material-icons {
    color: #2196F3;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    font-family: 'Roboto', sans-serif;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.btn-primary {
    background: #2196F3;
    color: white;
}

.btn-primary:hover {
    background: #1976D2;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(33, 150, 243, 0.3);
}

.btn-icon {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    padding: 0;
}

.btn-edit {
    background: #E3F2FD;
    color: #2196F3;
}

.btn-edit:hover {
    background: #BBDEFB;
}

.btn-delete {
    background: #FFEBEE;
    color: #F44336;
}

.btn-delete:hover {
    background: #FFCDD2;
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    color: #424242;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #E0E0E0;
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s;
    font-family: 'Roboto', sans-serif;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #2196F3;
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

/* Tables */
.table-container {
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    overflow: hidden;
}

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

thead {
    background: #F5F5F5;
}

th {
    padding: 16px;
    text-align: left;
    font-weight: 500;
    color: #424242;
    font-size: 14px;
    border-bottom: 2px solid #E0E0E0;
}

td {
    padding: 16px;
    border-bottom: 1px solid #F5F5F5;
    color: #424242;
}

tbody tr {
    transition: background 0.2s;
}

tbody tr:hover {
    background: #F9F9F9;
}

/* Search Bar */
.search-bar {
    background: white;
    border-radius: 8px;
    padding: 12px 16px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    display: flex;
    align-items: center;
    gap: 12px;
}

.search-bar input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 15px;
    font-family: 'Roboto', sans-serif;
}

.search-bar .material-icons {
    color: #757575;
}

/* Alerts */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
}

.alert-success {
    background: #E8F5E9;
    color: #2E7D32;
    border-left: 4px solid #4CAF50;
}

.alert-error {
    background: #FFEBEE;
    color: #C62828;
    border-left: 4px solid #F44336;
}

.alert-info {
    background: #E3F2FD;
    color: #1976D2;
    border-left: 4px solid #2196F3;
}

/* Status Badges */
.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.status-active {
    background: #E8F5E9;
    color: #2E7D32;
}

.status-pending {
    background: #FFF3E0;
    color: #F57C00;
}

.status-cancelled {
    background: #FFEBEE;
    color: #C62828;
}

/* Page Header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.page-title {
    font-size: 28px;
    font-weight: 400;
    color: #212121;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
    }
    
    .main-content {
        margin-left: 0;
    }
}