:root {
  
  --primary-color: #1E3A8A;        
  --primary-light: #3B82F6;        
  --primary-dark: #1E40AF;         
  
  --secondary-color: #E0F2FE;      
  --accent-color: #14B8A6;         

 
  --success-color: #22C55E;        
  --warning-color: #F59E0B;        
  --danger-color: #EF4444;         

  --text-color: #0F172A;           
  --text-light: #64748B;                

  
  --white: #FFFFFF;
  --gray-100: #F1F5F9; 
  --gray-200: #E2E8F0;
  --gray-300: #CBD5E1;
  --gray-400: #94A3B8;
  --gray-500: #64748B;

  --border-radius: 10px;
  --box-shadow: 0 6px 16px rgba(30, 58, 138, 0.15);
  --transition: all 0.3s ease-in-out;
}


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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--secondary-color);
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: var(--transition);
}

a:hover {
    color: black;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
}

/* Utility Classes */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}
.logo-image {
  vertical-align: middle;
}


.d-flex {
    display: flex;
}

.justify-between {
    justify-content: space-between;
}

.align-center {
    align-items: center;
}

.flex-wrap {
    flex-wrap: wrap;
}

/* Responsive Grid System */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -15px;
}

.col-md-4, .col-md-6, .col-md-8, .col-md-12 {
    padding: 0 15px;
    width: 100%;
}

@media (min-width: 768px) {
    .col-md-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
    .col-md-6 { flex: 0 0 50%; max-width: 50%; }
    .col-md-8 { flex: 0 0 66.666667%; max-width: 66.666667%; }
    .col-md-12 { flex: 0 0 100%; max-width: 100%; }
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
    text-align: center;
    gap: 8px;
    font-size: 0.95em;
    line-height: 1.4;
    letter-spacing: 0.01em;
    white-space: nowrap;
}

.btn i {
    font-size: 1.1em;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
    box-shadow: 0 2px 4px rgba(13, 71, 161, 0.1);
}

.btn-primary:hover {
    background-color: var(--primary-light); ;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(13, 71, 161, 0.2);
}

.btn-secondary {
    background-color: var(--gray-200);
    color: var(--text-color);
}

.btn-secondary:hover {
    background-color: var(--gray-300);
    transform: translateY(-1px);
    font-weight: bold;
}

.btn-success {
    background-color: var(--success-color);
    color: var(--white);
}

.btn-success:hover {
    background-color: #3d8b40;
    color: #f7f7f7;
    transform: translateY(-1px);
}

.btn-danger {
    background-color: var(--danger-color);
    color: var(--white);
}

.btn-danger:hover {
    background-color: #d32f2f;
    color: white;
    transform: translateY(-1px);
}

.btn-warning {
    background-color: var(--warning-color);
    color: var(--text-color);
}

.btn-warning:hover {
    background-color: #e68900;
    transform: translateY(-1px);
    color: black;
}

.btn-block {
    display: block;
    width: 100%;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.875em;
}

.btn-lg {
    padding: 12px 30px;
    font-size: 1.1em;
}


@media (max-width: 768px) {
    .btn {
        padding: 8px 16px;
        font-size: 0.9em;
    }
    
    .btn-responsive {
        display: block;
        width: 100%;
        margin-bottom: 10px;
    }
    
    .btn-group {
        display: flex;
        flex-direction: column;
        gap: 10px;
    }
    
    .btn-group .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .btn {
        padding: 6px 12px;
        font-size: 0.85em;
    }
}


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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--gray-300);
    border-radius: var(--border-radius);
    font-size: 1em;
    transition: var(--transition);
    background-color: var(--white);
    box-sizing: border-box;
}

.form-control:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(13, 71, 161, 0.1);
}

.form-row {
    display: flex;
    margin: 0 -10px;
    gap: 20px;
}

.form-col {
    flex: 1;
    padding: 0 10px;
}


@media (max-width: 768px) {
    .form-row {
        flex-direction: column;
        gap: 0;
        margin: 0;
    }
    
    .form-col {
        margin-bottom: 15px;
        padding: 0;
    }
    
    .form-control {
        padding: 10px;
        font-size: 16px; 
    }
}


.card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 20px;
    overflow: hidden;
    transition: var(--transition);
}

.card:hover {
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

.card-header {
    padding: 20px;
    border-bottom: 1px solid var(--gray-300);
    background-color: var(--gray-100);
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.card-body {
    padding: 20px;
}

.card-footer {
    padding: 20px;
    border-top: 1px solid var(--gray-300);
    background-color: var(--gray-100);
}


@media (max-width: 768px) {
    .card-header {
        padding: 15px;
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }
    
    .card-body {
        padding: 15px;
    }
    
    .card-footer {
        padding: 15px;
    }
}


.table-container {
    overflow-x: auto;
    margin-bottom: 20px;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    -webkit-overflow-scrolling: touch;
}

.table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 0;
    min-width: 600px;
}

.table th,
.table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--gray-300);
    vertical-align: middle;
}

.table th {
    background-color: var(--gray-100);
    font-weight: 600;
    color: var(--text-color);
    position: sticky;
    top: 0;
    z-index: 10;
}

.table tr:hover {
    background-color: var(--gray-100);
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(0, 0, 0, 0.02);
}


@media (max-width: 768px) {
    .table-container {
        margin: 0 -15px;
        border-radius: 0;
    }
    
    .table th,
    .table td {
        padding: 10px 8px;
        font-size: 0.9em;
    }
    
    .table {
        min-width: 700px;
    }
}

@media (max-width: 480px) {
    .table th,
    .table td {
        padding: 8px 6px;
        font-size: 0.85em;
    }
}


.alert {
    padding: 15px 20px;
    margin-bottom: 20px;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert i {
    font-size: 1.2em;
    flex-shrink: 0;
}

.alert-success {
    background-color: #e8f5e9;
    color: #2e7d32;
    border: 1px solid #a5d6a7;
}

.alert-danger {
    background-color: #ffebee;
    color: #c62828;
    border: 1px solid #ffcdd2;
}

.alert-warning {
    background-color: #fff3e0;
    color: #ef6c00;
    border: 1px solid #ffe0b2;
}


@media (max-width: 768px) {
    .alert {
        padding: 12px 15px;
        font-size: 0.9em;
    }
}


.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 0.85em;
    font-weight: 600;
    line-height: 1.4;
    white-space: nowrap;
}

.badge-success {
    background-color: var(--success-color);
    color: var(--white);
}

.badge-warning {
    background-color: var(--warning-color);
    color: var(--text-color);
}

.badge-danger {
    background-color: var(--danger-color);
    color: var(--white);
}

.badge-primary {
    background-color: var(--primary-color);
    color: var(--white);
}

.badge-secondary {
    background-color: var(--gray-400);
    color: var(--white);
}


@media (max-width: 480px) {
    .badge {
        font-size: 0.75em;
        padding: 3px 8px;
    }
}


.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1050;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    padding: 20px;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background-color: var(--white);
    border-radius: var(--border-radius);
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    transform: translateY(20px);
    transition: var(--transition);
}

.modal-overlay.active .modal {
    transform: translateY(0);
}

.modal-header {
    padding: 20px;
    border-bottom: 1px solid var(--gray-300);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    margin: 0;
    font-size: 1.25em;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5em;
    cursor: pointer;
    color: var(--text-light);
    padding: 0;
    line-height: 1;
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 20px;
    border-top: 1px solid var(--gray-300);
    text-align: right;
}

.modal-footer button {
    margin-left: 10px;
}


@media (max-width: 768px) {
    .modal-overlay {
        padding: 10px;
    }
    
    .modal {
        max-width: 100%;
        max-height: 95vh;
    }
    
    .modal-header {
        padding: 15px;
    }
    
    .modal-body {
        padding: 15px;
    }
    
    .modal-footer {
        padding: 15px;
        text-align: center;
    }
    
    .modal-footer button {
        margin: 5px;
        width: 100%;
        max-width: 200px;
    }
}


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

@media (max-width: 768px) {
    .stats-container {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 15px;
    }
}

@media (max-width: 480px) {
    .stats-container {
        grid-template-columns: 1fr;
        gap: 15px;
    }
}


.dashboard-row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -10px;
    gap: 20px;
}

.dashboard-col {
    flex: 1;
    min-width: 300px;
    padding: 0 10px;
    margin-bottom: 20px;
}

@media (max-width: 768px) {
    .dashboard-row {
        flex-direction: column;
        margin: 0;
        gap: 0;
    }
    
    .dashboard-col {
        min-width: auto;
        padding: 0;
    }
}


.books-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    width: 100%; 
}

@media (max-width: 768px) {
    .books-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 15px;
    }
}

@media (max-width: 480px) {
    .books-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
}


.search-section {
    margin-bottom: 20px;
}

.search-section .d-flex {
    gap: 10px;
    align-items: flex-end;
}

@media (max-width: 768px) {
    .search-section .d-flex {
        flex-direction: column;
        align-items: stretch;
        gap: 15px;
    }
    
    .search-section .form-group {
        margin-bottom: 0;
    }
}


.fine-summary {
    margin-bottom: 20px;
}

.badge-container {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    align-items: center;
}

@media (max-width: 768px) {
    .badge-container {
        justify-content: center;
        gap: 10px;
    }
}

@media (max-width: 480px) {
    .badge-container {
        flex-direction: column;
        gap: 8px;
    }
    
    .badge-container .badge {
        width: 100%;
        text-align: center;
        padding: 8px 12px;
    }
}


.payment-summary {
    position: sticky;
    top: 20px;
}

@media (max-width: 768px) {
    .payment-summary {
        position: static;
        margin-bottom: 20px;
    }
}


.d-none {
    display: none;
}

.d-block {
    display: block;
}

@media (max-width: 768px) {
    .d-md-none {
        display: none;
    }
    
    .d-md-block {
        display: block;
    }
}

@media (max-width: 480px) {
    .d-sm-none {
        display: none;
    }
    
    .d-sm-block {
        display: block;
    }
}


@media (max-width: 768px) {
    .text-md-center {
        text-align: center;
    }
    
    .text-md-left {
        text-align: left;
    }
}


.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 3rem; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 3rem; }

.mr-1 { margin-right: 0.25rem; }
.mr-2 { margin-right: 0.5rem; }
.mr-3 { margin-right: 1rem; }

.ml-1 { margin-left: 0.25rem; }
.ml-2 { margin-left: 0.5rem; }
.ml-3 { margin-left: 1rem; }


.book-details-container {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 30px;
    margin: 30px 0;
}

.book-info-card {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
}

.book-cover {
    height: 300px;
    background: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.book-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.book-stats {
    padding: 20px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.stat-item {
    text-align: center;
    padding: 15px;
    background: var(--gray-100);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.stat-item:hover {
    background: var(--gray-200);
    transform: translateY(-2px);
}

.stat-label {
    display: block;
    font-size: 0.9em;
    color: var(--text-light);
    margin-bottom: 5px;
}

.stat-value {
    display: block;
    font-size: 1.5em;
    font-weight: 600;
    color: var(--primary-color);
}

.book-details-form {
    background: var(--white);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

@media (max-width: 992px) {
    .book-details-container {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .book-info-card {
        max-width: 400px;
        margin: 0 auto;
    }
    
    .book-details-form {
        padding: 20px;
    }
}

@media (max-width: 768px) {
    .book-stats {
        grid-template-columns: 1fr;
        gap: 10px;
        padding: 15px;
    }
    
    .stat-item {
        padding: 10px;
    }
}


.issue-book-form {
    max-width: 800px;
    margin: 0 auto;
    background: var(--white);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.issue-book-form .form-group {
    margin-bottom: 25px;
}

.issue-book-form select.form-control {
    height: auto;
    padding: 12px;
}

@media (max-width: 768px) {
    .issue-book-form {
        padding: 20px;
        margin: 0 15px;
    }
}


.ebook-details {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 30px;
    margin-bottom: 30px;
}

.ebook-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 20px;
}

.ebook-title {
    margin: 0 0 10px 0;
    font-size: 1.8em;
    color: var(--primary-color);
}

.ebook-meta {
    color: var(--text-light);
    font-size: 0.9em;
    margin-bottom: 20px;
}

.ebook-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.file-info {
    background: var(--gray-100);
    padding: 20px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
}

.file-info-item {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--gray-300);
}

.file-info-item:last-child {
    border-bottom: none;
}

.file-info-label {
    color: var(--text-light);
    font-weight: 500;
}

.file-info-value {
    color: var(--text-color);
    font-weight: 600;
}

@media (max-width: 768px) {
    .ebook-details {
        padding: 20px;
    }
    
    .ebook-header {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }
    
    .ebook-title {
        font-size: 1.5em;
    }
    
    .ebook-actions {
        justify-content: center;
    }
    
    .file-info {
        padding: 15px;
    }
    
    .file-info-item {
        flex-direction: column;
        gap: 5px;
        text-align: center;
    }
}


@media print {
    .btn,
    .modal,
    .sidebar,
    .header,
    .search-section {
        display: none !important;
    }
    
    .content-wrapper {
        margin: 0 !important;
        padding: 0 !important;
    }
    
    .card {
        box-shadow: none !important;
        border: 1px solid #000 !important;
        break-inside: avoid;
    }
    
    .table {
        font-size: 12px;
    }
    
    .page-title {
        font-size: 18px;
        margin-bottom: 20px;
    }    
}
.feedback-card {
    background: white;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: relative;
    margin-top: 30px 
}

.feedback-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
}

.user-role {
    color: #666;
    font-size: 0.9em;
}

.feedback-date {
    color: #666;
}

.feedback-content h3 {
    margin-top: 0;
    color: #333;
}

.feedback-type {
    color: #666;
    margin: 5px 0;
}

.feedback-message {
    line-height: 1.6;
    margin-bottom: 15px;
}

.feedback-actions {
    text-align: right;
}

.no-feedback {
    text-align: center;
    padding: 40px;
    color: #666;
}

.alert {
    padding: 10px 15px;
    margin-bottom: 20px;
    border-radius: 4px;
}

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

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

.btn {
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
}

.btn-danger {
    background-color: #dc3545;
    color: white;
    border: none;
}
.unique-id-badge {
    background: #e3f2fd;
    color: #1976d2;
    padding: 4px 8px;
    border-radius: 4px;
    font-weight: 600;
    font-family: monospace;
    font-size: 0.9em;
}
.user-selection-container {
    margin-bottom: 15px;
}

.selection-options {
    margin-bottom: 5px;
    font-size: 0.9em;
}

.news-preview-section {
  background: var(--white);
}

.news-preview-card {
  background: var(--white);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--box-shadow);
  transition: var(--transition);
}

.news-preview-card:hover {
  transform: translateY(-6px);
}

.news-preview-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.news-preview-body {
  padding: 16px;
}

.news-preview-body h5 {
  color: var(--primary-color);
  font-weight: 700;
  margin-bottom: 8px;
}

.news-preview-body p {
  font-size: 14px;
  color: var(--text-light);
}

.read-more-link {
  color: var(--primary-light);
  font-weight: 600;
  text-decoration: none;
}