/* Modern Hotel Billing Management System - Enhanced Design */
/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary-color: #64748b;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #06b6d4;
    --light-bg: #f8fafc;
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--gray-800);
    line-height: 1.6;
    font-size: 16px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header styles */
.header {
    background: var(--white);
    box-shadow: var(--shadow-lg);
    border-radius: var(--border-radius);
    margin-bottom: 30px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 30px;
    flex-wrap: wrap;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo h2 {
    color: var(--primary-color);
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo i {
    font-size: 32px;
    color: var(--primary-color);
}

.nav-menu ul {
    display: flex;
    list-style: none;
    gap: 8px;
    flex-wrap: wrap;
}

.nav-menu a {
    text-decoration: none;
    color: var(--gray-600);
    padding: 12px 20px;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
    font-weight: 500;
    position: relative;
    overflow: hidden;
} 
.nav-menu a:hover::before {
    left: 100%;
}

/* Highlight the current/active page differently */
.nav-menu a.active, .nav-menu a[aria-current="page"] {
    background: rgba(37, 99, 235, 0.12); /* lighter blue */
    color: var(--primary-color);
    font-weight: 600;
    box-shadow: none;
    transform: none;
}

/* Only highlight the hovered item */
.nav-menu a:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.logout-btn {
    background: linear-gradient(135deg, var(--danger-color), #dc2626);
    color: var(--white);
    padding: 10px 20px;
    border-radius: var(--border-radius-sm);
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
    box-shadow: var(--shadow-sm);
}

.logout-btn:hover {
    background: linear-gradient(135deg, #dc2626, #b91c1c);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Main content */
.main-content {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: var(--shadow-xl);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Dashboard styles */
.dashboard h1 {
    color: var(--gray-900);
    margin-bottom: 40px;
    font-size: 36px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--gray-900), var(--gray-700));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 50px;
}

.stat-card {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--white);
    padding: 30px;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    gap: 25px;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
    transform: translateX(-100%);
    transition: var(--transition);
}

.stat-card:hover::before {
    transform: translateX(100%);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.stat-card i {
    font-size: 48px;
    opacity: 0.9;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
}

.stat-info h3 {
    font-size: 32px;
    margin-bottom: 8px;
    font-weight: 700;
}

.stat-info p {
    opacity: 0.95;
    font-size: 16px;
    font-weight: 500;
}

/* Quick actions */
.quick-actions {
    margin-bottom: 50px;
}

.quick-actions h2 {
    color: var(--gray-900);
    margin-bottom: 25px;
    font-size: 28px;
    font-weight: 600;
}

.action-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

/* Button styles */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 24px;
    border: none;
    border-radius: var(--border-radius-sm);
    text-decoration: none;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    justify-content: center;
    font-size: 16px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary-color), #475569);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, #475569, var(--secondary-color));
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color), #059669);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-success:hover {
    background: linear-gradient(135deg, #059669, var(--success-color));
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-info {
    background: linear-gradient(135deg, var(--info-color), #0891b2);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-info:hover {
    background: linear-gradient(135deg, #0891b2, var(--info-color));
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

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

.btn-danger:hover {
    background: linear-gradient(135deg, #dc2626, var(--danger-color));
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-block {
    width: 100%;
}

/* Recent activities */
.recent-activities h2 {
    color: var(--gray-900);
    margin-bottom: 25px;
    font-size: 28px;
    font-weight: 600;
}

.activity-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: var(--gray-50);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-color);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.activity-item:hover {
    background: var(--white);
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.activity-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: var(--shadow-md);
}

.activity-content p {
    font-weight: 500;
    color: var(--gray-800);
    margin-bottom: 5px;
}

.activity-content small {
    color: var(--gray-500);
    font-size: 14px;
}

/* Login page styles */
.login-page {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 450px;
}

.login-box {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-xl);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.login-header {
    text-align: center;
    margin-bottom: 40px;
}

.login-header i {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 20px;
    display: block;
}

.login-header h1 {
    color: var(--gray-900);
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 10px;
}

.login-header p {
    color: var(--gray-600);
    font-size: 16px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--gray-700);
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group label i {
    margin-right: 8px;
    color: var(--primary-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius-sm);
    font-size: 16px;
    transition: var(--transition);
    background: var(--white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    transform: translateY(-2px);
}

.login-footer {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--gray-200);
    text-align: center;
    color: var(--gray-600);
    font-size: 14px;
}

.login-footer p {
    margin-bottom: 5px;
}

/* Alert styles */
.alert {
    padding: 16px 20px;
    border-radius: var(--border-radius-sm);
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
}

.alert-error {
    background: linear-gradient(135deg, #fef2f2, #fee2e2);
    color: #991b1b;
    border-left: 4px solid var(--danger-color);
}

.alert-success {
    background: linear-gradient(135deg, #f0fdf4, #dcfce7);
    color: #166534;
    border-left: 4px solid var(--success-color);
}

.alert-info {
    background: linear-gradient(135deg, #eff6ff, #dbeafe);
    color: #1e40af;
    border-left: 4px solid var(--info-color);
}

/* Table styles */
.table-container {
    overflow-x: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
}

th, td {
    padding: 16px 20px;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

th {
    background: linear-gradient(135deg, var(--gray-50), var(--gray-100));
    font-weight: 600;
    color: var(--gray-700);
    text-transform: uppercase;
    font-size: 14px;
    letter-spacing: 0.5px;
}

tr:hover {
    background: var(--gray-50);
    transition: var(--transition);
}

/* Status badges */
.status-badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status-available {
    background: linear-gradient(135deg, var(--success-color), #059669);
    color: var(--white);
}

.status-occupied {
    background: linear-gradient(135deg, var(--danger-color), #dc2626);
    color: var(--white);
}

.status-maintenance {
    background: linear-gradient(135deg, var(--warning-color), #d97706);
    color: var(--white);
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    .header-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        padding: 15px 20px;
        flex-wrap: wrap;
    }
    
    .logo h2 {
        font-size: 20px;
    }
    
    .logo i {
        font-size: 24px;
    }
    
    .user-menu {
        order: 3;
        width: 100%;
        margin-top: 15px;
        justify-content: center;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .action-buttons {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .container {
        padding: 15px;
    }
    
    .main-content {
        padding: 25px 20px;
    }
    
    .dashboard h1 {
        font-size: 28px;
        text-align: center;
    }
    
    .quick-actions h2,
    .recent-activities h2 {
        font-size: 24px;
        text-align: center;
    }
    
    .stat-card {
        padding: 25px 20px;
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .stat-card i {
        font-size: 36px;
    }
    
    .stat-info h3 {
        font-size: 28px;
    }
    
    .activity-item {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .activity-icon {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
    
    .login-box {
        padding: 30px 25px;
    }
    
    .login-header h1 {
        font-size: 28px;
    }
    
    .btn {
        padding: 12px 20px;
        font-size: 14px;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 12px 16px;
        font-size: 16px;
    }
    
    /* Mobile menu styles */
    .mobile-menu-toggle {
        display: block;
        background: none;
        border: none;
        font-size: 24px;
        color: var(--primary-color);
        cursor: pointer;
        padding: 10px;
        border-radius: var(--border-radius-sm);
        transition: var(--transition);
        order: 2;
    }
    
    .mobile-menu-toggle:hover {
        background: var(--gray-100);
    }
    
    .mobile-menu-toggle.active {
        background: var(--primary-color);
        color: var(--white);
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        left: -100%;
        width: 280px;
        height: 100vh;
        background: var(--white);
        box-shadow: var(--shadow-xl);
        transition: var(--transition);
        z-index: 1000;
        padding: 80px 20px 20px;
        overflow-y: auto;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu ul {
        flex-direction: column;
        gap: 0;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-menu a {
        display: block;
        padding: 15px 20px;
        border-radius: var(--border-radius-sm);
        margin-bottom: 5px;
        font-size: 16px;
    }
    
    .nav-menu a:hover {
        background: var(--primary-color);
        color: var(--white);
        transform: none;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
    }
    
    .main-content {
        padding: 20px 15px;
    }
    
    .header-content {
        padding: 15px;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
    
    .logo h2 {
        font-size: 18px;
    }
    
    .logo i {
        font-size: 20px;
    }
    
    .mobile-menu-toggle {
        font-size: 20px;
        padding: 8px;
    }
    
    .user-menu {
        order: 3;
        width: 100%;
        margin-top: 10px;
        justify-content: center;
    }
    
    .stat-card {
        padding: 20px 15px;
    }
    
    .stat-info h3 {
        font-size: 24px;
    }
    
    .btn {
        padding: 10px 16px;
        font-size: 13px;
    }
    
    .login-box {
        padding: 25px 20px;
    }
    
    .login-header h1 {
        font-size: 24px;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 10px 14px;
    }
    
    .nav-menu {
        width: 100%;
        left: -100%;
    }
}

/* Modal styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background: var(--white);
    margin: 2% auto;
    padding: 0;
    border-radius: var(--border-radius-lg);
    width: 90%;
    max-width: 600px;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn 0.3s ease-out;
    max-height: 90vh;
    overflow-y: auto;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--white);
    padding: 25px 30px;
    border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    margin: 0;
    font-size: 24px;
    font-weight: 600;
}

.close {
    color: var(--white);
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition);
}

.close:hover {
    transform: scale(1.1);
}

.modal form {
    padding: 30px;
}

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

.form-actions {
    display: flex;
    gap: 15px;
    justify-content: flex-end;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--gray-200);
}

/* Page header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 20px;
}

.page-header h1 {
    color: var(--gray-900);
    font-size: 32px;
    font-weight: 700;
    margin: 0;
}

/* Search bar */
.search-bar {
    display: flex;
    gap: 15px;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.search-input {
    flex: 1;
    min-width: 250px;
    padding: 12px 20px;
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius-sm);
    font-size: 16px;
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 14px;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 18px;
}

/* Form validation */
.field-error {
    color: var(--danger-color);
    font-size: 14px;
    margin-top: 5px;
    display: flex;
    align-items: center;
    gap: 5px;
}

.form-group input.error,
.form-group select.error,
.form-group textarea.error {
    border-color: var(--danger-color);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

/* Notification system */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 16px 20px;
    border-radius: var(--border-radius-sm);
    color: var(--white);
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    animation: slideInRight 0.3s ease-out;
    max-width: 400px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
}

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

.notification-success {
    background: linear-gradient(135deg, var(--success-color), #059669);
}

.notification-error {
    background: linear-gradient(135deg, var(--danger-color), #dc2626);
}

.notification-info {
    background: linear-gradient(135deg, var(--info-color), #0891b2);
}

.notification button {
    background: none;
    border: none;
    color: var(--white);
    font-size: 18px;
    cursor: pointer;
    padding: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
}

.notification button:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Print styles */
@media print {
    .header,
    .nav-menu,
    .user-menu,
    .btn {
        display: none !important;
    }
    
    body {
        background: var(--white) !important;
    }
    
    .container {
        max-width: none;
        padding: 0;
    }
    
    .main-content {
        box-shadow: none;
        border-radius: 0;
        padding: 20px;
    }
}

/* Room card styles for home page */
.room-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.room-card {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    padding: 30px;
    position: relative;
    transition: var(--transition);
    border: 1px solid var(--gray-200);
    overflow: hidden;
}

.room-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
}

.room-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.room-card .status-badge {
    position: absolute;
    top: 20px;
    right: 20px;
}

.room-card h3 {
    margin-bottom: 15px;
    color: var(--primary-color);
    font-size: 24px;
    font-weight: 700;
}

.room-card .room-info {
    margin-bottom: 15px;
    color: var(--gray-600);
    font-size: 16px;
    line-height: 1.6;
}

.room-card .room-amenities {
    color: var(--gray-500);
    font-size: 14px;
    margin-bottom: 20px;
    font-style: italic;
}

.room-card .room-actions {
    margin-top: 20px;
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.room-card .room-actions form {
    display: inline;
}

/* Filter bar styles */
.filter-bar {
    display: flex;
    gap: 25px;
    align-items: center;
    margin-bottom: 35px;
    background: linear-gradient(135deg, var(--gray-50), var(--gray-100));
    border-radius: var(--border-radius);
    padding: 25px 30px;
    box-shadow: var(--shadow-md);
    font-size: 16px;
    flex-wrap: wrap;
}

.filter-bar label {
    font-weight: 600;
    font-size: 16px;
    color: var(--gray-700);
    display: flex;
    align-items: center;
    gap: 8px;
}

.filter-bar input,
.filter-bar select {
    padding: 12px 16px;
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius-sm);
    font-size: 16px;
    transition: var(--transition);
    background: var(--white);
}

.filter-bar input:focus,
.filter-bar select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Mobile responsive adjustments for room cards and filter bar */
@media (max-width: 768px) {
    .room-list {
        grid-template-columns: 1fr;
        gap: 20px;
        margin-top: 30px;
    }
    
    .room-card {
        padding: 25px 20px;
    }
    
    .room-card h3 {
        font-size: 20px;
    }
    
    .room-card .room-actions {
        flex-direction: column;
    }
    
    .filter-bar {
        flex-direction: column;
        align-items: stretch;
        gap: 15px;
        padding: 20px;
    }
    
    .filter-bar > div {
        display: flex;
        flex-direction: column;
        gap: 8px;
    }
    
    .filter-bar label {
        font-size: 14px;
    }
    
    .filter-bar input,
    .filter-bar select {
        padding: 10px 14px;
        font-size: 16px;
    }
    
    /* Mobile menu styles */
    .mobile-menu-toggle {
        display: block;
        background: none;
        border: none;
        font-size: 24px;
        color: var(--primary-color);
        cursor: pointer;
        padding: 10px;
        border-radius: var(--border-radius-sm);
        transition: var(--transition);
    }
    
    .mobile-menu-toggle:hover {
        background: var(--gray-100);
    }
    
    .mobile-menu-toggle.active {
        background: var(--primary-color);
        color: var(--white);
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        left: -100%;
        width: 280px;
        height: 100vh;
        background: var(--white);
        box-shadow: var(--shadow-xl);
        transition: var(--transition);
        z-index: 1000;
        padding: 0;
        overflow-y: auto;
        display: block;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu ul {
        flex-direction: column;
        gap: 0;
        padding: 20px;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-menu a {
        display: block;
        padding: 15px 20px;
        border-radius: var(--border-radius-sm);
        margin-bottom: 5px;
        font-size: 16px;
    }
    
    .nav-menu a:hover {
        background: var(--primary-color);
        color: var(--white);
        transform: none;
    }
}

@media (max-width: 480px) {
    .room-card {
        padding: 20px 15px;
    }
    
    .room-card h3 {
        font-size: 18px;
    }
    
    .filter-bar {
        padding: 15px;
    }
    
    .filter-bar input,
    .filter-bar select {
        padding: 8px 12px;
        font-size: 16px;
    }
    
    .nav-menu {
        width: 100%;
        left: -100%;
    }
}

/* Toast notification styles */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 400px;
}

.toast {
    background: var(--white);
    border-radius: var(--border-radius-sm);
    padding: 16px 20px;
    box-shadow: var(--shadow-lg);
    border-left: 4px solid var(--primary-color);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: slideInRight 0.3s ease-out;
    max-width: 100%;
}

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

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

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

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

.toast-icon {
    font-size: 20px;
    flex-shrink: 0;
}

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

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

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

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

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

.toast-title {
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--gray-900);
}

.toast-message {
    color: var(--gray-600);
    font-size: 14px;
    line-height: 1.4;
}

.toast-close {
    background: none;
    border: none;
    color: var(--gray-400);
    font-size: 18px;
    cursor: pointer;
    padding: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
    flex-shrink: 0;
}

.toast-close:hover {
    background: var(--gray-100);
    color: var(--gray-600);
}

/* Hide mobile menu toggle on desktop */
.mobile-menu-toggle {
    display: none;
}

/* Hide hamburger by default (desktop) */
.mobile-menu-toggle {
    display: none;
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block !important;
    }
}

/* Mobile menu backdrop overlay */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    pointer-events: none;
}
/* Animation classes */
.animate-on-load {
    opacity: 0;
    transform: translateY(20px);
}

.fade-in {
    animation: fadeIn 0.6s ease-out forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Enhanced focus styles for accessibility */
.btn:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Loading spinner */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--gray-200);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

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

/* --- Desktop styles --- */
.nav-menu {
    display: flex;
    align-items: center;
    background: none;
    position: static;
    width: auto;
    height: auto;
    box-shadow: none;
    padding: 0;
    transition: none;
    z-index: auto;
    overflow: visible;
}

.nav-menu ul {
    display: flex;
    flex-direction: row;
    gap: 20px;
    padding: 0;
    margin: 0;
}

.mobile-menu-header,
.mobile-menu-close {
    display: none !important;
}

@media (max-width: 900px) {
    .nav-menu {
        display: block;
    }
}

/* --- Mobile/Tablet styles --- */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        left: -100%;
        width: 280px;
        height: 100vh;
        background: var(--white);
        box-shadow: var(--shadow-xl);
        transition: var(--transition);
        z-index: 1000;
        padding: 0;
        overflow-y: auto;
        display: block;
    }
    .nav-menu.active {
        left: 0;
    }
    .nav-menu ul {
        flex-direction: column;
        gap: 0;
        padding: 20px;
    }
    .mobile-menu-header {
        display: flex !important;
        justify-content: space-between;
        align-items: center;
        padding: 20px;
        background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
        color: var(--white);
        position: sticky;
        top: 0;
        z-index: 1;
    }
    .mobile-menu-header h3 {
        margin: 0;
        font-size: 18px;
        font-weight: 600;
    }
    .mobile-menu-close {
        display: flex !important;
        background: none;
        border: none;
        color: var(--white);
        font-size: 20px;
        cursor: pointer;
        padding: 8px;
        border-radius: 50%;
        transition: var(--transition);
        align-items: center;
        justify-content: center;
        width: 32px;
        height: 32px;
    }
    .mobile-menu-close:hover {
        background: rgba(255, 255, 255, 0.2);
    }
    .mobile-menu-overlay {
        z-index: 999;
    }
} 
@media (max-width: 768px) {
    .main-content {
      z-index: -1 !important;
      position: relative;
    }
  }
  
/* Booking number column styling for bills table */
.bills-table td.booking-numbers,
#billsTable td.booking-numbers {
    word-break: break-all;
    white-space: normal;
    font-size: 0.98em;
    vertical-align: middle;
    padding-top: 10px;
    padding-bottom: 10px;
    line-height: 1.4;
}