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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f5f6fa;
    overflow-x: hidden;
}

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

.sidebar {
    width: 260px;
    background: #2c3e50;
    color: white;
    padding: 20px;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 40px;
}

.logo-icon {
    width: 45px;
    height: 45px;
    background: #FF5A5F;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.logo h2 {
    font-size: 20px;
}

.nav {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: #bdc3c7;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s;
}

.nav-item:hover {
    background: #34495e;
    color: white;
}

.nav-item.active {
    background: #FF5A5F;
    color: white;
}

.main-content {
    flex: 1;
    margin-left: 260px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.header {
    background: white;
    padding: 20px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

#content {
    padding: 20px 30px;
    flex: 1;
}

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

.btn-logout {
    padding: 8px 20px;
    background: #e74c3c;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

#content {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
}

.page {
    display: none;
}

.page.active {
    display: block;
}

.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: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.stat-card h3 {
    color: #7f8c8d;
    font-size: 14px;
    margin-bottom: 10px;
}

.stat-number {
    font-size: 32px;
    font-weight: bold;
    color: #2c3e50;
}

.table-container {
    background: white;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

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

.data-table th {
    background: #f8f9fa;
    padding: 15px;
    text-align: left;
    font-weight: 600;
    color: #2c3e50;
}

.data-table td {
    padding: 15px;
    border-bottom: 1px solid #ecf0f1;
}

.data-table tr:hover {
    background: #f8f9fa;
}

.btn-action {
    padding: 6px 12px;
    margin: 0 4px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
}

.btn-edit {
    background: #3498db;
    color: white;
}

.btn-delete {
    background: #e74c3c;
    color: white;
}

.btn-approve {
    background: #27ae60;
    color: white;
}

.settings-form {
    background: white;
    padding: 30px;
    border-radius: 12px;
    max-width: 600px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #2c3e50;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
}

.btn-primary {
    padding: 12px 30px;
    background: #FF5A5F;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
}

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

.alert {
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.recent-activity {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    margin-top: 20px;
}

.recent-activity h2 {
    margin-bottom: 20px;
    color: #2c3e50;
}

.activity-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
}

.activity-icon {
    font-size: 24px;
}

.activity-content p {
    margin: 0;
    color: #2c3e50;
}

.activity-content small {
    color: #7f8c8d;
}

/* Settings Form */
.settings-form {
    max-width: 800px;
}

.settings-section {
    background: white;
    padding: 25px;
    border-radius: 10px;
    margin-bottom: 25px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.settings-section h2 {
    font-size: 20px;
    margin-bottom: 20px;
    color: #2C3E50;
    border-bottom: 2px solid #FF5A5F;
    padding-bottom: 10px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #2C3E50;
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: #FF5A5F;
}

.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background: #FF5A5F;
    color: white;
}

.btn-primary:hover {
    background: #E04A4F;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(255, 90, 95, 0.3);
}

.alert {
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}