* {
    margin: 0;
    padding: 100;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    background-color: #f0f2f5;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 55px;
    background: linear-gradient(to right, #2196f3, #f44336);
    color: white;
}

.logo {
    font-size: 40px;
    font-weight: bold;
}



.nav-link {
    color: white;
    text-decoration: none;
    padding: 30px;
    font-size: 20px;
   
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

.user-section {
    display: flex;
    align-items: center;
    gap: 30px;
    font-size: 20px;
}

.logout-btn {
    color: white;
    font-size: 24px;
}


.container {
    display: flex;
    min-height: 825px;
}

.sidebar {
    width: 250px;
    background: white;
    box-shadow: 2px 0 5px rgba(0, 0, 0, 0.1);
}

.sidebar-link {
    display: flex;
    align-items: center;
    padding: 12px 24px;
    text-decoration: none;
    color: #666;
    font-size: 18px;


}

.sidebar-link.active {
    background-color: #f44336;
    color: white;
}

.sidebar-link:hover:not(.active) {
    background-color: #f0f2f5;
}


.main-content {
    flex: 1;
    padding: 19px;
}


.metrics-container {
    display: flex;
    gap: 14px;
    margin-bottom: 2rem;
}

.metric-card {
    flex: 1;
    padding: 1.5rem;
    border-radius: 20px;
    color: white;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.metric-card:hover {
    transform: translateY(-5px);
}

.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.3;
    background: radial-gradient(circle at top right, rgba(255,255,255,0.8), transparent);
}

.metric-card.members {
    background: linear-gradient(135deg, #FF416C, #FF4B2B);
}

.metric-card.books {
    background: linear-gradient(135deg, #11998e, #38ef7d);
}

.metric-card.issued {
    background: linear-gradient(135deg, #FCB045, #FD1D1D);
}

.metric-card.returned {
    background: linear-gradient(135deg, #56CCF2, #2F80ED);
}

.metric-icon {
    font-size: 2.5rem;
    position: relative;
    z-index: 1;
}

.metric-value {
    font-size: 2.5rem;
    font-weight: bold;
    position: relative;
    z-index: 1;
}

.metric-label {
    font-size: 1rem;
    position: relative;
    z-index: 1;
}


.circulations-section {
    background: white;
    border-radius: 15px;
    padding: 1.5rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.add-issue-btn {
    background-color: #2196f3;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.add-issue-btn:hover {
    background-color: #1976d2;
}


.table-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.entries-select {
    padding: 0.25rem;
    margin: 0 0.5rem;
    border-radius: 4px;
    border: 1px solid #ddd;
}

.search-input {
    padding: 0.5rem;
    margin-left: 0.5rem;
    border-radius: 4px;
    border: 1px solid #ddd;
    width: 200px;
}


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

.circulations-table th,
.circulations-table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

.circulations-table th {
    background-color: #f8f9fa;
    font-weight: bold;
}

.circulations-table tbody tr:hover {
    background-color: #f8f9fa;
}


.status-returned,
.status-issued,
.status-overdue {
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.875rem;
}

.status-returned {
    background-color: #e8f5e9;
    color: #2e7d32;
}

.status-issued {
    background-color: #e3f2fd;
    color: #1565c0;
}

.status-overdue {
    background-color: #ffebee;
    color: #c62828;
}

.action-btn {
    padding: 0.25rem 0.75rem;
    border: none;
    border-radius: 4px;
    background-color: #2196f3;
    color: white;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.action-btn:hover {
    background-color: #1976d2;
}

footer{
    text-align: center;
    font-size: 30px;
}

/*Media Queries*/
@media(max-width:768px) {
.header{
    flex-direction: column;
    text-align: center;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

.container {
    grid-template-areas: ;
}

}