/* ========== IMPORTS ========== */
@import url('https://fonts.googleapis.com/css2?family=Tajawal:wght@300;400;500;700&display=swap');

/* ========== ROOT VARIABLES ========== */
:root {
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --secondary: #22d3ee;
    --accent: #f59e0b;
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --bg-card-hover: #263348;
    --bg-input: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --border: #334155;
    --radius: 12px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s ease;
}

/* ========== RESET & BASE ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

body[dir="rtl"] {
    font-family: 'Tajawal', 'Segoe UI', sans-serif;
}

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

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

/* ========== AUTH PAGES (LOGIN/REGISTER) ========== */
.auth-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);
}

.auth-container {
    background: var(--bg-card);
    padding: 40px;
    border-radius: 20px;
    width: 100%;
    max-width: 440px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.auth-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--primary));
}

.auth-logo {
    text-align: center;
    margin-bottom: 32px;
}

.auth-logo .icon {
    font-size: 48px;
    margin-bottom: 12px;
    display: block;
}

.auth-logo h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.auth-logo p {
    color: var(--text-secondary);
    font-size: 14px;
}

.lang-switch {
    position: absolute;
    top: 16px;
    right: 16px;
    display: flex;
    gap: 6px;
}

body[dir="rtl"] .lang-switch {
    right: auto;
    left: 16px;
}

.lang-switch a {
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 13px;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.lang-switch a:hover,
.lang-switch a.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* ========== FORM ELEMENTS ========== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: #0b1120;
    border: 2px solid;
    border-color: #0f172a #475569 #475569 #0f172a;
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 15px;
    transition: var(--transition);
    outline: none;
    font-family: inherit;
    box-shadow: inset 2px 2px 6px rgba(0, 0, 0, 0.5), inset -1px -1px 2px rgba(71, 85, 105, 0.2);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: #1e3a5f #6366f1 #6366f1 #1e3a5f;
    box-shadow: inset 2px 2px 6px rgba(0, 0, 0, 0.5), inset -1px -1px 2px rgba(71, 85, 105, 0.2), 0 0 8px rgba(99, 102, 241, 0.25);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

body[dir="rtl"] .form-group select {
    background-position: left 12px center;
    padding-right: 16px;
    padding-left: 36px;
}

.form-group .error-text {
    color: var(--danger);
    font-size: 12px;
    margin-top: 4px;
}

/* ========== BUTTONS ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    text-decoration: none;
    line-height: 1;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    width: 100%;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
    color: white;
}

.btn-success {
    background: linear-gradient(135deg, #22c55e, #16a34a);
    color: white;
}

.btn-success:hover {
    background: linear-gradient(135deg, #4ade80, #22c55e);
    color: white;
}

.btn-danger {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
}

.btn-danger:hover {
    background: linear-gradient(135deg, #f87171, #ef4444);
    color: white;
}

.btn-warning {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: white;
}

.btn-warning:hover {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    color: white;
}

.btn-info {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: white;
}

.btn-info:hover {
    background: linear-gradient(135deg, #60a5fa, #3b82f6);
    color: white;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
    border-radius: 8px;
}

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

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

/* ========== ALERTS ========== */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: #4ade80;
}

.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #f87171;
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #fbbf24;
}

/* ========== LAYOUT ========== */
.layout {
    display: flex;
    min-height: 100vh;
}

/* ========== SIDEBAR ========== */
.sidebar {
    width: 260px;
    background: var(--bg-card);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 100;
    transition: var(--transition);
}

body[dir="rtl"] .sidebar {
    border-right: none;
    border-left: 1px solid var(--border);
    left: auto;
    right: 0;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid var(--border);
    text-align: center;
}

.sidebar-header .logo-icon {
    font-size: 36px;
    margin-bottom: 8px;
    display: block;
}

.sidebar-header h2 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
}

.sidebar-header small {
    color: var(--text-muted);
    font-size: 12px;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: 10px;
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    transition: var(--transition);
}

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

.sidebar-nav a.active {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(139, 92, 246, 0.1));
    color: var(--primary-light);
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.sidebar-nav a .nav-icon {
    font-size: 20px;
    width: 24px;
    text-align: center;
}

.sidebar-footer {
    padding: 16px 12px;
    border-top: 1px solid var(--border);
}

.sidebar-footer .user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 10px;
    margin-bottom: 8px;
}

.sidebar-footer .avatar {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
    color: white;
    flex-shrink: 0;
}

.sidebar-footer .user-details {
    overflow: hidden;
}

.sidebar-footer .user-details strong {
    display: block;
    font-size: 14px;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-footer .user-details span {
    font-size: 12px;
    color: var(--text-muted);
}

.sidebar-footer .lang-links {
    display: flex;
    gap: 6px;
    padding: 0 12px;
    margin-bottom: 8px;
}

.sidebar-footer .lang-links a {
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 12px;
    color: var(--text-muted);
    border: 1px solid var(--border);
}

.sidebar-footer .lang-links a:hover,
.sidebar-footer .lang-links a.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.logout-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 10px 16px;
    border: none;
    border-radius: 10px;
    background: rgba(239, 68, 68, 0.1);
    color: #f87171;
    cursor: pointer;
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
}

.logout-btn:hover {
    background: rgba(239, 68, 68, 0.2);
}

/* ========== MAIN CONTENT ========== */
.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 32px;
    min-height: 100vh;
}

body[dir="rtl"] .main-content {
    margin-left: 0;
    margin-right: 260px;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    flex-wrap: wrap;
    gap: 16px;
}

.page-header h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
}

.page-header p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-top: 4px;
}

/* ========== STAT CARDS ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 24px;
    border: 1px solid var(--border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

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

.stat-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 80px;
    height: 80px;
    border-radius: 0 0 0 80px;
    opacity: 0.1;
}

.stat-card.books::after { background: var(--primary); }
.stat-card.users::after { background: var(--secondary); }
.stat-card.borrowings::after { background: var(--warning); }
.stat-card.returns::after { background: var(--success); }

.stat-card .stat-icon {
    font-size: 32px;
    margin-bottom: 12px;
}

.stat-card .stat-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.stat-card .stat-label {
    color: var(--text-secondary);
    font-size: 14px;
}

/* ========== CARD / PANEL ========== */
.card {
    background: var(--bg-card);
    border-radius: 16px;
    border: 1px solid var(--border);
    overflow: hidden;
    margin-bottom: 24px;
}

.card-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.card-header h2 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.card-body {
    padding: 24px;
}

/* ========== TABLE ========== */
.table-responsive {
    overflow-x: auto;
}

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

table th {
    padding: 14px 16px;
    text-align: left;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid var(--border);
}

body[dir="rtl"] table th {
    text-align: right;
}

table td {
    padding: 14px 16px;
    font-size: 14px;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(51, 65, 85, 0.5);
}

table tr:hover td {
    background: rgba(99, 102, 241, 0.03);
}

table tr:last-child td {
    border-bottom: none;
}

/* ========== BADGES ========== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.badge-success {
    background: rgba(34, 197, 94, 0.1);
    color: #4ade80;
    border: 1px solid rgba(34, 197, 94, 0.2);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.1);
    color: #fbbf24;
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.badge-danger {
    background: rgba(239, 68, 68, 0.1);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.badge-info {
    background: rgba(59, 130, 246, 0.1);
    color: #60a5fa;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.badge-primary {
    background: rgba(99, 102, 241, 0.1);
    color: #818cf8;
    border: 1px solid rgba(99, 102, 241, 0.2);
}

/* ========== SEARCH BAR ========== */
.search-bar {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.search-bar input {
    flex: 1;
    padding: 10px 16px;
    background: #0b1120;
    border: 2px solid;
    border-color: #0f172a #475569 #475569 #0f172a;
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: var(--transition);
    box-shadow: inset 2px 2px 6px rgba(0, 0, 0, 0.5), inset -1px -1px 2px rgba(71, 85, 105, 0.2);
}

.search-bar input:focus {
    border-color: #1e3a5f #6366f1 #6366f1 #1e3a5f;
    box-shadow: inset 2px 2px 6px rgba(0, 0, 0, 0.5), inset -1px -1px 2px rgba(71, 85, 105, 0.2), 0 0 8px rgba(99, 102, 241, 0.25);
}

/* ========== MODAL ========== */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 999;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

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

.modal {
    background: var(--bg-card);
    border-radius: 20px;
    width: 100%;
    max-width: 520px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 24px;
    cursor: pointer;
    padding: 4px;
    line-height: 1;
}

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

.modal-body {
    padding: 24px;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* ========== FOOTER ========== */
.footer {
    text-align: center;
    padding: 24px;
    color: var(--text-muted);
    font-size: 13px;
    border-top: 1px solid var(--border);
    margin-top: 40px;
}

/* ========== EMPTY STATE ========== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-state .icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state p {
    font-size: 16px;
}

/* ========== FORM INLINE ACTIONS ========== */
.action-btns {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
    .sidebar {
        display: none;
    }

    .main-content {
        margin-left: 0 !important;
        margin-right: 0 !important;
        padding: 16px;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }

    .auth-container {
        padding: 24px;
    }
}

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

/* ========== SCROLLBAR ========== */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ========== ANIMATIONS ========== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.card, .stat-card {
    animation: fadeIn 0.3s ease;
}

/* ========== BOOK DETAILS CARD (member request) ========== */
.book-detail-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 28px;
    margin-bottom: 24px;
}

.book-detail-card .detail-row {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 15px;
}

.book-detail-card .detail-label {
    color: var(--text-muted);
    min-width: 120px;
    font-weight: 600;
}

.book-detail-card .detail-value {
    color: var(--text-primary);
}

/* ========== PERMISSIONS CHECKBOX ========== */
.perm-group {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin: 12px 0;
}

.perm-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: #0b1120;
    border: 2px solid;
    border-color: #0f172a #475569 #475569 #0f172a;
    border-radius: 4px;
    box-shadow: inset 2px 2px 6px rgba(0, 0, 0, 0.5), inset -1px -1px 2px rgba(71, 85, 105, 0.2);
    cursor: pointer;
    transition: var(--transition);
}

.perm-item:hover {
    border-color: #1e3a5f #6366f1 #6366f1 #1e3a5f;
}

.perm-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
    cursor: pointer;
}

.perm-item label {
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
}

/* ========== REQUEST STATUS FLOW ========== */
.request-flow {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}

.request-flow .btn {
    min-width: 80px;
}