/* ========================================================
   SISTEM DESAIN PERPUSTAKAAN SEKOLAH MODERN
   Simpel, Bersih, Responsif & Elegan
   ======================================================== */

:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #eef2ff;
    --primary-dark: #3730a3;
    
    --secondary: #0ea5e9;
    --secondary-hover: #0284c7;
    
    --success: #10b981;
    --success-light: #ecfdf5;
    --success-dark: #047857;
    
    --danger: #ef4444;
    --danger-light: #fef2f2;
    --danger-dark: #b91c1c;
    
    --warning: #f59e0b;
    --warning-light: #fffbeb;
    --warning-dark: #b45309;
    
    --info: #3b82f6;
    --info-light: #eff6ff;
    
    --slate-50: #f8fafc;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-800: #1e293b;
    --slate-900: #0f172a;
    
    --bg-body: #f8fafc;
    --bg-card: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    
    --sidebar-width: 260px;
    --header-height: 68px;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --transition: all 0.2s ease-in-out;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.5;
    font-size: 14.5px;
    -webkit-font-smoothing: antialiased;
}

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

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

/* ========================================================
   LAYOUT STRUKTUR ADMIN
   ======================================================== */
.admin-wrapper {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.admin-sidebar {
    width: var(--sidebar-width);
    background: #0f172a;
    color: #f1f5f9;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 50;
    transition: transform 0.3s ease;
    box-shadow: 2px 0 12px rgba(0,0,0,0.15);
}

.sidebar-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.1rem;
    font-weight: 700;
    color: #ffffff;
}

.brand-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.sidebar-nav {
    flex: 1;
    padding: 1.25rem 0.75rem;
    overflow-y: auto;
}

.nav-section {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--slate-400);
    padding: 0.75rem 0.75rem 0.35rem;
    font-weight: 700;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding: 0.7rem 0.85rem;
    border-radius: var(--radius-sm);
    color: #94a3b8;
    font-weight: 500;
    margin-bottom: 0.2rem;
    transition: var(--transition);
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
}

.nav-link.active {
    background: var(--primary);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.35);
}

.nav-icon {
    width: 20px;
    height: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.nav-badge {
    margin-left: auto;
    font-size: 0.72rem;
    padding: 2px 7px;
    border-radius: 9999px;
    font-weight: 600;
    background: rgba(239, 68, 68, 0.2);
    color: #f87171;
}

.sidebar-footer {
    padding: 1rem 1.25rem;
    border-top: 1px solid rgba(255,255,255,0.08);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: var(--slate-700);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: #38bdf8;
}

.user-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: #f1f5f9;
    max-width: 120px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-role {
    font-size: 0.72rem;
    color: var(--slate-400);
}

/* Main Content Area */
.admin-main {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: margin-left 0.3s ease;
}

/* Header */
.admin-topbar {
    height: var(--header-height);
    background: #ffffff;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    position: sticky;
    top: 0;
    z-index: 40;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.sidebar-toggle-btn {
    display: none;
    background: none;
    border: none;
    color: var(--slate-600);
    cursor: pointer;
    padding: 6px;
    border-radius: var(--radius-sm);
}

.page-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--slate-800);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.btn-public-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--slate-600);
    background: var(--slate-100);
    padding: 0.45rem 0.9rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
}

.btn-public-link:hover {
    background: var(--slate-200);
    color: var(--slate-900);
}

/* Content Container */
.admin-content {
    padding: 2rem;
    flex: 1;
}

/* ========================================================
   KOMPONEN KARTU & STATISTIK
   ======================================================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem 1.5rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: 1.25rem;
    transition: var(--transition);
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon.primary { background: var(--primary-light); color: var(--primary); }
.stat-icon.secondary { background: #e0f2fe; color: #0284c7; }
.stat-icon.success { background: var(--success-light); color: var(--success); }
.stat-icon.warning { background: var(--warning-light); color: var(--warning-dark); }
.stat-icon.danger { background: var(--danger-light); color: var(--danger); }

.stat-info {
    flex: 1;
}

.stat-label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--text-muted);
    margin-bottom: 0.2rem;
}

.stat-value {
    font-size: 1.65rem;
    font-weight: 700;
    color: var(--slate-900);
    line-height: 1.1;
}

.stat-sub {
    font-size: 0.75rem;
    color: var(--slate-500);
    margin-top: 0.35rem;
}

/* Card Panel */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.75rem;
    overflow: hidden;
}

.card-header {
    padding: 1.1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #ffffff;
}

.card-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--slate-800);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    background: var(--slate-50);
}

/* ========================================================
   TABEL & DATA
   ======================================================== */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.table th {
    background: var(--slate-50);
    padding: 0.85rem 1rem;
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--slate-500);
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.table td {
    padding: 0.95rem 1rem;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
    font-size: 0.9rem;
    color: var(--slate-700);
}

.table tbody tr:hover {
    background-color: var(--slate-50);
}

.table-striped tbody tr:nth-child(even) {
    background-color: #fafbfc;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.65rem;
    border-radius: 9999px;
    line-height: 1.2;
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: currentColor;
}

.badge-info { background: var(--info-light); color: var(--info); }
.badge-success { background: var(--success-light); color: var(--success-dark); }
.badge-danger { background: var(--danger-light); color: var(--danger-dark); }
.badge-warning { background: var(--warning-light); color: var(--warning-dark); }
.badge-secondary { background: var(--slate-100); color: var(--slate-600); }

/* ========================================================
   TOMBOL & AKSI
   ======================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.55rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    line-height: 1.4;
}

.btn-sm {
    font-size: 0.78rem;
    padding: 0.35rem 0.65rem;
    border-radius: var(--radius-sm);
}

.btn-lg {
    font-size: 1rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
}

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

.btn-secondary {
    background: var(--slate-100);
    color: var(--slate-700);
    border-color: var(--slate-200);
}
.btn-secondary:hover {
    background: var(--slate-200);
    color: var(--slate-900);
}

.btn-success {
    background: var(--success);
    color: #ffffff;
}
.btn-success:hover {
    background: #059669;
    color: #ffffff;
}

.btn-danger {
    background: var(--danger);
    color: #ffffff;
}
.btn-danger:hover {
    background: var(--danger-dark);
    color: #ffffff;
}

.btn-warning {
    background: var(--warning);
    color: #ffffff;
}
.btn-warning:hover {
    background: var(--warning-dark);
    color: #ffffff;
}

.btn-outline {
    background: transparent;
    border-color: var(--border-color);
    color: var(--slate-600);
}
.btn-outline:hover {
    background: var(--slate-50);
    border-color: var(--slate-300);
    color: var(--slate-900);
}

.btn-icon {
    padding: 0.4rem;
    border-radius: var(--radius-sm);
}

/* ========================================================
   FORM & FILTER
   ======================================================== */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--slate-700);
    margin-bottom: 0.4rem;
}

.form-label.required::after {
    content: " *";
    color: var(--danger);
}

.form-control,
.form-select {
    width: 100%;
    padding: 0.6rem 0.85rem;
    font-size: 0.9rem;
    color: var(--slate-800);
    background-color: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    outline: none;
    font-family: inherit;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

textarea.form-control {
    min-height: 90px;
    resize: vertical;
}

.form-text {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 0.35rem;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

/* Alert Notification */
.alert {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding: 0.9rem 1.2rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1.5rem;
    border: 1px solid transparent;
}

.alert-success { background: var(--success-light); border-color: #a7f3d0; color: #065f46; }
.alert-danger { background: var(--danger-light); border-color: #fecaca; color: #991b1b; }
.alert-warning { background: var(--warning-light); border-color: #fde68a; color: #92400e; }
.alert-info { background: var(--info-light); border-color: #bfdbfe; color: #1e40af; }

.alert-content {
    flex: 1;
    font-size: 0.875rem;
}

.alert-close {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: currentColor;
    opacity: 0.7;
}
.alert-close:hover { opacity: 1; }

/* Filter Bar */
.filter-bar {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: flex-end;
}

/* Tabs */
.nav-tabs {
    display: flex;
    gap: 0.5rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.tab-btn {
    padding: 0.75rem 1.25rem;
    border: none;
    background: none;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--slate-500);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.tab-btn:hover {
    color: var(--slate-800);
}

.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 600;
}

/* ========================================================
   MODAL DIALOG
   ======================================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 100;
    padding: 1rem;
}

.modal-overlay.show {
    display: flex;
}

.modal-box {
    background: #ffffff;
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 550px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    animation: modalSlide 0.25s ease-out;
}

@keyframes modalSlide {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

.modal-header {
    padding: 1.2rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-body {
    padding: 1.5rem;
    max-height: 75vh;
    overflow-y: auto;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    background: var(--slate-50);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* ========================================================
   PUBLIC LANDING PAGE STYLES
   ======================================================== */
.public-header {
    background: #ffffff;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 50;
    box-shadow: var(--shadow-sm);
}

.public-nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.hero-section {
    background: linear-gradient(135deg, #1e1b4b 0%, #312e81 40%, #1e293b 100%);
    color: #ffffff;
    padding: 4.5rem 1.5rem 5.5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: #cbd5e1;
    max-width: 650px;
    margin: 0 auto 2.5rem;
}

.search-box-wrap {
    max-width: 680px;
    margin: 0 auto;
    position: relative;
}

.search-box-inner {
    background: #ffffff;
    border-radius: var(--radius-lg);
    padding: 0.5rem;
    display: flex;
    align-items: center;
    box-shadow: 0 15px 30px rgba(0,0,0,0.25);
}

.search-input {
    flex: 1;
    border: none;
    padding: 0.8rem 1.25rem;
    font-size: 1rem;
    outline: none;
    color: var(--slate-900);
}

/* Catalog Grid */
.catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.book-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.35rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: var(--transition);
}

.book-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
    border-color: #cbd5e1;
}

.book-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.book-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--slate-800);
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.book-author {
    font-size: 0.85rem;
    color: var(--slate-600);
    margin-bottom: 1rem;
}

.book-stock {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 0.85rem;
    border-top: 1px dashed var(--border-color);
}

/* ========================================================
   PRINT STYLES (@media print)
   ======================================================== */
@media print {
    .admin-sidebar,
    .admin-topbar,
    .btn,
    .filter-bar,
    .pagination,
    .no-print {
        display: none !important;
    }
    
    .admin-main {
        margin-left: 0 !important;
    }
    
    .admin-content {
        padding: 0 !important;
    }
    
    body {
        background: #fff !important;
        color: #000 !important;
        font-size: 11pt;
    }
    
    .card {
        border: none !important;
        box-shadow: none !important;
    }
    
    .table th, .table td {
        border: 1px solid #ddd !important;
        padding: 6px 8px !important;
    }
    
    .print-header {
        display: block !important;
        text-align: center;
        margin-bottom: 25px;
        border-bottom: 2px solid #000;
        padding-bottom: 15px;
    }
}

.print-header {
    display: none;
}

/* ========================================================
   RESPONSIVITAS MOBILE & TABLET
   ======================================================== */
@media (max-width: 1024px) {
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .sidebar-toggle-btn {
        display: block;
    }
    
    .admin-sidebar {
        transform: translateX(-100%);
    }
    
    .admin-sidebar.open {
        transform: translateX(0);
    }
    
    .admin-main {
        margin-left: 0;
    }
    
    .admin-content {
        padding: 1.25rem;
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: 1.85rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
}