/**
 * Siam CLMT Library System - Main Stylesheet
 * Thai-first design with Light/Dark theme support
 */

/* CSS Variables */
:root {
    /* Colors - Light Theme */
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-primary-light: #dbeafe;
    --color-secondary: #64748b;
    --color-success: #22c55e;
    --color-success-light: #dcfce7;
    --color-warning: #f59e0b;
    --color-warning-light: #fef3c7;
    --color-danger: #ef4444;
    --color-danger-light: #fee2e2;
    --color-info: #0ea5e9;
    --color-info-light: #e0f2fe;
    
    /* Background & Text */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    
    /* Typography */
    --font-thai: 'Noto Sans Thai', sans-serif;
    --font-english: 'Inter', sans-serif;
    --font-base: var(--font-thai), var(--font-english);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 200ms ease;
    --transition-slow: 300ms ease;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --border-color: #334155;
    --color-primary-light: #1e3a5f;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.5);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-base);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 0;
    /* margin-bottom: var(--spacing-sm); */
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

p { margin-bottom: var(--spacing-md); }

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

a:hover {
    color: var(--color-primary-hover);
}

/* Container */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Navbar */
.navbar {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-sm) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.navbar-brand svg {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-primary);
    background-color: var(--color-primary-light);
}

.navbar-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-primary);
}

/* Theme Toggle Icons */
.theme-icon-dark { display: none; }
[data-theme="dark"] .theme-icon-light { display: none; }
[data-theme="dark"] .theme-icon-dark { display: block; }

/* Main Content */
.main-content {
    flex: 1;
    padding: var(--spacing-xl) 0;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn svg {
    width: 18px;
    height: 18px;
}

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

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

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: var(--border-color);
}

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

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

.btn-ghost {
    background-color: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover {
    background-color: var(--bg-tertiary);
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
}

.btn-icon {
    padding: var(--spacing-sm);
}

.btn-block {
    width: 100%;
}

/* Cards */
.card {
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.card-header {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: inherit;
    font-size: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-control-lg {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1.125rem;
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right var(--spacing-sm) center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
}

.form-checkbox, .form-radio {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.form-checkbox input, .form-radio input {
    width: 1.25rem;
    height: 1.25rem;
    accent-color: var(--color-primary);
}

.form-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

.form-error {
    font-size: 0.75rem;
    color: var(--color-danger);
    margin-top: var(--spacing-xs);
}

/* Alerts */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: opacity var(--transition-normal);
}

.alert-success {
    background-color: var(--color-success-light);
    color: #166534;
    border: 1px solid #bbf7d0;
}

.alert-danger, .alert-error {
    background-color: var(--color-danger-light);
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-warning {
    background-color: var(--color-warning-light);
    color: #92400e;
    border: 1px solid #fde68a;
}

.alert-info {
    background-color: var(--color-info-light);
    color: #075985;
    border: 1px solid #bae6fd;
}

.alert-close {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0.7;
}

.alert-close:hover {
    opacity: 1;
}

/* Tables */
.table-container {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.table th, .table td {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background-color: var(--bg-secondary);
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
}

.table tbody tr:hover {
    background-color: var(--bg-secondary);
}

.table-striped tbody tr:nth-child(even) {
    background-color: var(--bg-secondary);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-full);
}

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

.badge-success {
    background-color: var(--color-success-light);
    color: #166534;
}

.badge-warning {
    background-color: var(--color-warning-light);
    color: #92400e;
}

.badge-danger {
    background-color: var(--color-danger-light);
    color: #991b1b;
}

.badge-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
}

.badge-book {
    background: linear-gradient(135deg, #e0f2fe, #bae6fd);
    color: #0369a1;
    gap: 4px;
}

.badge-ebook {
    background: linear-gradient(135deg, #ede9fe, #ddd6fe);
    color: #6d28d9;
    gap: 4px;
}

.badge-info {
    background-color: var(--color-info-light, #e0f2fe);
    color: #0369a1;
}

/* Grid */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }

/* Flex utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.gap-xs { gap: var(--spacing-xs); }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }

/* Spacing utilities */
.m-0 { margin: 0; }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.p-0 { padding: 0; }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }

/* Text utilities */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-primary { color: var(--color-primary); }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }
.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.font-bold { font-weight: 600; }

/* Footer */
.footer {
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    margin-top: auto;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
    margin-bottom: var(--spacing-md);
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: var(--text-secondary);
}

.footer-section a:hover {
    color: var(--color-primary);
}

.footer-section p {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.footer-section p svg {
    width: 16px;
    height: 16px;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
}

/* Book Card */
.book-card {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.book-card .card-body {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.book-cover {
    width: 100%;
    aspect-ratio: 2/3;
    object-fit: cover;
    border-radius: var(--radius-md);
    background-color: var(--bg-tertiary);
    margin-bottom: var(--spacing-md);
}

.book-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.book-author {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.book-meta {
    margin-top: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Search Box */
.search-box {
    position: relative;
    max-width: 600px;
    margin: 0 auto;
}

.search-box input {
    padding-left: 3rem;
    padding-right: 3rem;
}

.search-box .search-icon {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-box .search-btn {
    position: absolute;
    right: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: var(--spacing-2xl) 0;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.hero p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.stat-card {
    text-align: center;
    padding: var(--spacing-lg);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: 0.875rem;
}

span.btn-text {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
}

.pagination a, .pagination span {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.pagination a:hover {
    background-color: var(--bg-tertiary);
}

.pagination .active {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.pagination .disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Modal */
.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: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

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

/* Modal as overlay (for management pages) */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: var(--spacing-lg);
    backdrop-filter: blur(4px);
}

.modal-content {
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-overlay.active .modal-content,
.modal-overlay.active > div {
    transform: translateY(0);
}

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-muted);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.modal-body {
    padding: var(--spacing-lg);
}

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    background-color: var(--bg-secondary);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

/* Sidebar Layout for Management */
.layout-sidebar {
    display: flex;
    min-height: calc(100vh - 60px);
}

.sidebar {
    width: 260px;
    background-color: var(--bg-primary);
    border-right: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    flex-shrink: 0;
}

.sidebar-nav {
    list-style: none;
}

.sidebar-nav li {
    margin-bottom: var(--spacing-xs);
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.sidebar-nav a:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.sidebar-nav a.active {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
    font-weight: 500;
}

.sidebar-nav a.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 60%;
    background-color: var(--color-primary);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.sidebar-nav a svg {
    width: 20px;
    height: 20px;
}

.sidebar-section {
    margin-bottom: var(--spacing-lg);
}

.sidebar-section-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
    padding: 0 var(--spacing-md);
}

.layout-content {
    flex: 1;
    padding: var(--spacing-lg);
    overflow-x: auto;
}

/* Page Header */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.page-title {
    margin: 0;
}

.page-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.loan-item {
    padding-left: 1rem;
}

.member-card-avatar {
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 1rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-muted);
}

.empty-state-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    background: var(--bg-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.empty-state-icon svg {
    width: 40px;
    height: 40px;
    opacity: 0.5;
}

.empty-state svg {
    width: 24px;
    height: 24px;
    /* margin-bottom: var(--spacing-md); */
    opacity: 0.5;
}

.empty-state h3,
.empty-state h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

/* Holds Grid - Modern Card Layout */
.holds-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.hold-card {
    position: relative;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    border: 1px solid var(--border-color);
}

.hold-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.hold-card--ready {
    border-color: var(--color-success);
    background: linear-gradient(to bottom, rgba(16, 185, 129, 0.05), var(--bg-secondary));
}

.hold-card-ribbon {
    position: absolute;
    top: 12px;
    right: -35px;
    background: var(--color-success);
    color: white;
    padding: 4px 40px;
    font-size: 0.75rem;
    font-weight: 600;
    transform: rotate(45deg);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    z-index: 10;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hold-card-cover {
    position: relative;
    padding: var(--spacing-lg);
    padding-bottom: 0;
    display: flex;
    justify-content: center;
}

.hold-card-cover img {
    width: 100px;
    height: 150px;
    object-fit: cover;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.hold-card-content {
    padding: var(--spacing-md) var(--spacing-lg);
    flex: 1;
}

.hold-card-title {
    font-size: 0.95rem;
    font-weight: 600;
    margin: 0 0 var(--spacing-sm);
    color: var(--text-primary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.hold-card-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.hold-card-detail {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.hold-card-detail svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.hold-card-detail--warning {
    color: var(--color-warning);
}

.hold-card-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    background: var(--bg-primary);
}

.btn-outline-danger {
    background: transparent;
    border: 1px solid var(--color-danger);
    color: var(--color-danger);
}

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

@media (max-width: 640px) {
    .holds-grid {
        grid-template-columns: 1fr;
    }
    
    .hold-card-ribbon {
        font-size: 0.7rem;
        padding: 3px 35px;
        top: 10px;
        right: -38px;
    }
}

/* Loading Spinner */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.spinner-sm {
    width: 16px;
    height: 16px;
    border-width: 2px;
}

.spinner-inline {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid currentColor;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    vertical-align: middle;
    margin-right: 8px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Button Loading State */
.btn.is-loading {
    position: relative;
    pointer-events: none;
    opacity: 0.85;
}

.btn.is-loading .btn-text {
    visibility: hidden;
}

.btn.is-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 18px;
    height: 18px;
    margin-top: -9px;
    margin-left: -9px;
    border: 2px solid currentColor;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* Form Loading Overlay */
.form-loading {
    position: relative;
}

.form-loading::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.7);
    z-index: 10;
    border-radius: var(--radius-md);
}

[data-theme="dark"] .form-loading::before {
    background: rgba(15, 23, 42, 0.7);
}

.form-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 32px;
    height: 32px;
    margin-top: -16px;
    margin-left: -16px;
    border: 3px solid var(--border-color);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    z-index: 11;
}

/* Loading Message */
.loading-message {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.loading-message .spinner-inline {
    border-color: var(--color-primary);
    border-top-color: transparent;
}

/* Feather spin animation for icons */
.spin {
    animation: spin 1s linear infinite;
}

/* Responsive */
@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(3, 1fr); }
    .grid-5 { grid-template-columns: repeat(3, 1fr); }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .navbar-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--bg-primary);
        border-top: 1px solid var(--border-color);
        flex-direction: column;
        padding: var(--spacing-md);
        display: none;
    }
    
    .navbar-menu.active {
        display: flex;
    }
    
    .navbar-toggle {
        display: block;
    }
    
    .grid-2, .grid-3, .grid-4, .grid-5 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero h1 {
        font-size: 1.75rem;
    }
    
    .sidebar {
        position: fixed;
        left: -260px;
        top: 60px;
        bottom: 0;
        z-index: 999;
        transition: left var(--transition-normal);
    }
    
    .sidebar.active {
        left: 0;
    }
}

@media (max-width: 480px) {
    .grid-2, .grid-3, .grid-4, .grid-5 {
        grid-template-columns: 1fr;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 99999;
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 400px;
    pointer-events: none;
}

.toast {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2), 0 2px 10px rgba(0, 0, 0, 0.1);
    border-left: 4px solid var(--color-primary);
    pointer-events: auto;
    animation: toastSlideIn 0.3s ease-out;
    transition: opacity 0.3s ease, transform 0.3s ease;
    position: relative;
    overflow: hidden;
}

.toast.toast-hiding {
    opacity: 0;
    transform: translateX(100%);
}

@keyframes toastSlideIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.toast-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

.toast-icon svg {
    width: 16px;
    height: 16px;
}

.toast-content {
    flex: 1;
    min-width: 0;
}

.toast-title {
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: var(--spacing-xs);
}

.toast-message {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.toast-close {
    flex-shrink: 0;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.toast-close:hover {
    color: var(--text-primary);
}

.toast-close svg {
    width: 16px;
    height: 16px;
}

/* Toast types */
.toast-success {
    border-left-color: var(--color-success);
}

.toast-success .toast-icon {
    background-color: var(--color-success-light);
    color: var(--color-success);
}

.toast-error {
    border-left-color: var(--color-danger);
}

.toast-error .toast-icon {
    background-color: var(--color-danger-light);
    color: var(--color-danger);
}

.toast-warning {
    border-left-color: var(--color-warning);
}

.toast-warning .toast-icon {
    background-color: var(--color-warning-light);
    color: var(--color-warning);
}

.toast-info {
    border-left-color: var(--color-info);
}

.toast-info .toast-icon {
    background-color: var(--color-info-light);
    color: var(--color-info);
}

/* Toast progress bar */
.toast-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: currentColor;
    opacity: 0.3;
    border-radius: 0 0 0 var(--radius-lg);
    animation: toastProgress linear forwards;
}

@keyframes toastProgress {
    from { width: 100%; }
    to { width: 0%; }
}

/* Mobile toast adjustments */
@media (max-width: 480px) {
    .toast-container {
        left: var(--spacing-md);
        right: var(--spacing-md);
        max-width: none;
    }
}

/* =========================================
   MOBILE-FIRST RESPONSIVE DESIGN
   PWA mobile-app-like experience
   ========================================= */

/* Tablet and below */
@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .grid-4 {
        grid-template-columns: repeat(3, 1fr);
    }
    .grid-5 {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Mobile screens */
@media (max-width: 768px) {
    html {
        font-size: 15px;
    }
    
    /* Navbar - Mobile app style */
    .navbar {
        padding: var(--spacing-xs) 0;
    }
    .navbar-brand {
        font-size: 1.1rem;
    }
    .navbar-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        border-radius: var(--radius-md);
    }
    .navbar-toggle:active {
        background: var(--bg-tertiary);
    }
    .navbar-menu {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--bg-primary);
        flex-direction: column;
        align-items: stretch;
        padding: var(--spacing-xl) var(--spacing-md);
        z-index: 9999;
        gap: var(--spacing-xs);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }
    .navbar-menu.active {
        display: flex;
    }
    .navbar-menu .nav-link {
        font-size: 1.1rem;
        padding: var(--spacing-md);
        border-radius: var(--radius-lg);
        border-bottom: 1px solid var(--border-color);
    }
    .navbar-menu .btn {
        width: 100%;
        justify-content: center;
        padding: var(--spacing-md);
        font-size: 1rem;
    }
    /* Close button for mobile menu */
    .navbar-menu::before {
        content: '✕';
        position: absolute;
        top: var(--spacing-md);
        right: var(--spacing-md);
        font-size: 1.5rem;
        cursor: pointer;
        color: var(--text-muted);
        width: 40px;
        height: 40px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    /* Grid - stack on mobile */
    .grid-2, .grid-3, .grid-4, .grid-5 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* Container */
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    /* Main content - reduce padding */
    .main-content {
        padding: var(--spacing-md) 0;
    }
    
    /* Hero - compact */
    .hero {
        padding: var(--spacing-lg) 0;
    }
    .hero h1 {
        font-size: 1.6rem;
    }
    .hero p {
        font-size: 1rem;
    }
    
    /* Stats - 2 columns */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
    .stat-card {
        padding: var(--spacing-md);
    }
    .stat-value {
        font-size: 1.5rem;
    }
    
    /* Book cards - bigger touch targets */
    .book-card .card-body {
        padding: var(--spacing-md);
    }
    .book-title {
        font-size: 0.9rem;
    }
    
    /* Table responsive */
    .table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        margin: 0 calc(-1 * var(--spacing-sm));
        padding: 0 var(--spacing-sm);
    }
    .table {
        font-size: 0.8rem;
    }
    .table th, .table td {
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    /* Cards */
    .card-header, .card-body, .card-footer {
        padding: var(--spacing-md);
    }
    
    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    /* Pagination */
    .pagination {
        flex-wrap: wrap;
    }
    .pagination a, .pagination span {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.85rem;
    }
    
    /* Buttons */
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    .btn-lg {
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    /* Search box - full width */
    .search-box {
        max-width: 100%;
    }
    
    /* Headings */
    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.25rem; }
    h3 { font-size: 1.1rem; }
    
    /* Modal - full screen on mobile */
    .modal-content {
        width: 100%;
        max-width: 100%;
        margin: 0;
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
        max-height: 90vh;
        position: fixed;
        bottom: 0;
    }
}

/* Small phone screens */
@media (max-width: 480px) {
    .grid-2, .grid-3, .grid-4, .grid-5 {
        grid-template-columns: 1fr 1fr;
    }
    
    /* Stack certain 2-col grids */
    .grid[style*="grid-template-columns: 1fr 1fr"] {
        grid-template-columns: 1fr !important;
    }
    
    .hero h1 {
        font-size: 1.4rem;
    }
    
    /* Bottom safe area for PWA */
    .footer {
        padding-bottom: calc(var(--spacing-lg) + env(safe-area-inset-bottom, 0px));
    }
    
    /* Touch-friendly inputs */
    .form-control {
        padding: 12px var(--spacing-md);
        font-size: 16px; /* Prevents iOS zoom */
    }
    
    /* Cards full-bleed on mobile */
    .card {
        border-radius: var(--radius-md);
    }
}

/* PWA standalone mode adjustments */
@media (display-mode: standalone) {
    .navbar {
        padding-top: env(safe-area-inset-top, 0px);
    }
    .footer {
        padding-bottom: calc(var(--spacing-lg) + env(safe-area-inset-bottom, 0px));
    }
}

/* Print styles */
@media print {
    .navbar, .footer, .btn, .pagination, .navbar-toggle {
        display: none !important;
    }
    .main-content {
        padding: 0;
    }
    .card {
        border: 1px solid #ddd;
        box-shadow: none;
    }
}