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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f7fa;
}

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-box {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 400px;
}

.app-container {
    display: flex;
    min-height: 100vh;
    position: relative;
}

.app-sidebar {
    width: 200px;
    background: linear-gradient(180deg, #2c3e50 0%, #1a252f 100%);
    color: white;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 999;
    display: none;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-header h3 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
}

.sidebar-menu {
    padding: 10px 0;
}

.menu-item {
    padding: 12px 18px;
    cursor: pointer;
    display: flex;
    align-items: center;
    transition: all 0.3s;
    color: #b0c4de;
}

.menu-item:hover {
    background: rgba(255,255,255,0.1);
    color: white;
}

.menu-item.active {
    background: rgba(102, 126, 234, 0.3);
    color: white;
    border-left: 4px solid #667eea;
}

.menu-item i {
    margin-right: 10px;
    font-size: 16px;
    width: 22px;
}

.menu-item span {
    font-size: 14px;
}

.sidebar-footer {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 15px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.logout-btn {
    width: 100%;
    padding: 10px;
    background: rgba(231, 76, 60, 0.8);
    border: none;
    color: white;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s;
}

.logout-btn:hover {
    background: #e74c3c;
}

.main-content {
    flex: 1;
    margin-left: 200px;
    transition: margin-left 0.3s ease;
}

.app-header {
    background: white;
    padding: 15px 25px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.menu-toggle-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #2c3e50;
    padding: 5px 10px;
    margin-right: 15px;
}

.header-left {
    display: flex;
    align-items: center;
    flex: 1;
}

.search-box {
    display: flex;
    align-items: center;
    background: #f5f7fa;
    padding: 10px 15px;
    border-radius: 25px;
    width: 350px;
}

.search-box i {
    color: #999;
    margin-right: 10px;
}

.search-box input {
    border: none;
    background: transparent;
    outline: none;
    flex: 1;
    font-size: 14px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
}

.content-body {
    padding: 25px;
}

.page-header {
    margin-bottom: 25px;
}

.page-header h1 {
    font-size: 28px;
    color: #2c3e50;
    margin: 0;
}

.card {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    border: none;
    margin-bottom: 20px;
}

.card-header {
    padding: 15px 20px;
    border-bottom: 1px solid #eee;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-body {
    padding: 20px;
}

.table {
    margin-bottom: 0;
}

.table thead th {
    border-top: none;
    font-weight: 600;
    color: #2c3e50;
    text-transform: uppercase;
    font-size: 12px;
    letter-spacing: 0.5px;
}

.badge {
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 12px;
}

.badge-success {
    background: #d4edda;
    color: #155724;
}

.badge-warning {
    background: #fff3cd;
    color: #856404;
}

.badge-danger {
    background: #f8d7da;
    color: #721c24;
}

.badge-info {
    background: #d1ecf1;
    color: #0c5460;
}

.btn {
    padding: 8px 16px;
    border-radius: 5px;
    font-size: 14px;
}

.btn-primary {
    background: #667eea;
    border-color: #667eea;
}

.btn-primary:hover {
    background: #5a67d8;
    border-color: #5a67d8;
}

.btn-outline-primary {
    color: #667eea;
    border-color: #667eea;
}

.btn-outline-primary:hover {
    background: #667eea;
    border-color: #667eea;
}

.modal-dialog {
    max-width: 600px;
}

.modal-header {
    border-bottom: 1px solid #eee;
}

.modal-footer {
    border-top: 1px solid #eee;
}

.form-control:focus, .form-select:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    display: flex;
    align-items: center;
    gap: 20px;
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
}

.stat-icon.blue {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.stat-icon.green {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: white;
}

.stat-icon.orange {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

.stat-icon.purple {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
}

.stat-info h3 {
    font-size: 28px;
    font-weight: 700;
    color: #2c3e50;
    margin: 0;
}

.stat-info p {
    color: #7f8c8d;
    margin: 0;
    font-size: 14px;
}

@media (max-width: 992px) {
    .app-sidebar {
        transform: translateX(-100%);
    }

    .app-sidebar.open {
        transform: translateX(0);
    }

    .sidebar-overlay.open {
        display: block;
    }

    .main-content {
        margin-left: 0;
    }

    .menu-toggle-btn {
        display: block;
    }

    .search-box {
        width: 250px;
    }
}

@media (max-width: 768px) {
    .app-header {
        padding: 12px 15px;
    }

    .search-box {
        width: 200px;
    }

    .content-body {
        padding: 15px;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .page-header h1 {
        font-size: 22px;
    }
}

@media (max-width: 576px) {
    .search-box {
        display: none;
    }

    .user-info span {
        display: none;
    }

    .page-header {
        flex-direction: column;
        gap: 10px;
        align-items: flex-start;
    }

    .page-header h1 {
        font-size: 20px;
    }
}