/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #9333ea;
    --primary-hover: #7e22ce;
    --primary-light: #a855f7;
    --primary-dark: #6b21a8;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --success-hover: #059669;
    --danger-color: #ef4444;
    --danger-hover: #dc2626;
    --warning-color: #f59e0b;
    --info-color: #9333ea;
    --dark-color: #1e293b;
    --light-color: #f8fafc;
    --light-hover: #f1f5f9;
    --border-color: #e2e8f0;
    --border-hover: #cbd5e1;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --white: #ffffff;
    --shadow: 0 2px 4px rgba(147, 51, 234, 0.1);
    --shadow-md: 0 4px 6px rgba(147, 51, 234, 0.1);
    --shadow-lg: 0 10px 25px rgba(147, 51, 234, 0.15);
    --shadow-xl: 0 20px 40px rgba(147, 51, 234, 0.1);
    --gradient-primary: linear-gradient(135deg, #9333ea 0%, #7e22ce 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    background: linear-gradient(135deg, #faf5ff 0%, #e9d5ff 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Professional Scrollbar */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--light-color);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--primary-hover) 0%, var(--primary-dark) 100%);
}

/* Navigation */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.75rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0rem;
    align-items: center;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    font-weight: 500;
    position: relative;
}

.nav-link:hover {
    background: var(--light-color);
    color: var(--primary-color);
    transform: translateY(-1px);
}

.nav-link.active {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

/* Main Container */
.main-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.25rem 1rem;
}

/* Page Header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.875rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}

.page-header h1,
.page-header h2 {
    font-size: 1.375rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0;
    line-height: 1.2;
}

.page-filters {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

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

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

.btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-hover) 0%, var(--primary-dark) 100%);
}

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

.btn-secondary:hover {
    background: #475569;
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #059669 100%);
    color: var(--white);
}

.btn-success:hover {
    background: linear-gradient(135deg, var(--success-hover) 0%, #047857 100%);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color) 0%, #dc2626 100%);
    color: var(--white);
}

.btn-danger:hover {
    background: linear-gradient(135deg, var(--danger-hover) 0%, #b91c1c 100%);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
}

.btn-group {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

/* Cards */
.card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 1.75rem;
    box-shadow: var(--shadow-md);
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

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

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--white);
    padding: 0.625rem 0.875rem;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 0.875rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-color);
    transform: scaleY(0);
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.stat-card:hover::before {
    transform: scaleY(1);
}

.stat-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--white);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    flex-shrink: 0;
}

.stat-card:hover .stat-icon {
    transform: scale(1.1) rotate(5deg);
}

.stat-icon.blue { background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%); }
.stat-icon.green { background: linear-gradient(135deg, #10b981 0%, #059669 100%); }
.stat-icon.orange { background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%); }
.stat-icon.purple { background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%); }
.stat-icon.red { background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%); }
.stat-icon.teal { background: linear-gradient(135deg, #14b8a6 0%, #0d9488 100%); }

.stat-content h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.125rem;
    line-height: 1.2;
}

.stat-content p {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin: 0;
}

/* Charts Grid */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.chart-card {
    background: var(--white);
    border-radius: var(--radius-sm);
    padding: 1.25rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

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

.chart-card h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 700;
}

.chart-card canvas {
    max-height: 300px;
    width: 100% !important;
    height: auto !important;
}

/* Form Elements */
.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    transition: var(--transition);
    background: var(--white);
    color: var(--text-primary);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
    transform: translateY(-1px);
}

.form-control:hover:not(:disabled) {
    border-color: var(--border-hover);
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

/* Invoice Form Styles */
.invoice-item {
    position: relative;
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 1rem;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.invoice-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.invoice-item .form-control {
    font-size: 0.875rem;
    border: 1px solid var(--border-color);
}

.invoice-item .form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.invoice-item .item-total {
    background: linear-gradient(135deg, var(--light-color) 0%, #e2e8f0 100%);
    font-weight: 700;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.invoice-totals-card {
    transition: var(--transition);
}

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

.total-row {
    transition: var(--transition);
}

.total-row:hover {
    background: rgba(37, 99, 235, 0.05);
    padding-left: 0.5rem;
    border-radius: var(--radius-sm);
}

.grand-total-row {
    animation: pulse 2s infinite;
}

/* Data Table */
.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.data-table thead {
    background: linear-gradient(135deg, var(--light-color) 0%, #e2e8f0 100%);
}

.data-table th {
    padding: 0.875rem 0.75rem;
    text-align: left;
    font-weight: 700;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.5px;
}

.data-table td {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    transition: var(--transition);
    font-size: 0.875rem;
}

.data-table tbody tr {
    transition: var(--transition);
}

.data-table tbody tr:hover {
    background: linear-gradient(90deg, rgba(37, 99, 235, 0.05) 0%, transparent 100%);
    transform: scale(1.01);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

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

.table-responsive {
    overflow-x: auto;
    margin-bottom: 1rem;
    -webkit-overflow-scrolling: touch;
}

/* Activity Grid */
.activity-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.activity-card {
    background: var(--white);
    border-radius: var(--radius-sm);
    padding: 1.25rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.activity-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    padding-bottom: 0.625rem;
    border-bottom: 2px solid var(--border-color);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease-out;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--white);
    border-radius: var(--radius);
    padding: 2.5rem;
    max-width: 900px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
    animation: slideIn 0.3s ease-out;
    position: relative;
}

.modal-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-radius: var(--radius) var(--radius) 0 0;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--danger-color);
    transform: rotate(90deg);
}

/* Badge */
.badge {
    padding: 0.375rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    box-shadow: var(--shadow);
}

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

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

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

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

/* Toast Container */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-width: 450px;
    pointer-events: none;
    padding: 0;
    margin: 0;
}

/* Toast/Notification */
.toast,
.notification {
    position: relative;
    padding: 1rem 1.25rem;
    border-radius: var(--radius-sm);
    color: var(--white);
    font-weight: 600;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
    min-width: 300px;
    max-width: 450px;
    pointer-events: auto;
    opacity: 0;
    transform: translateX(400px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-left: 4px solid rgba(255, 255, 255, 0.5);
}

.toast.show,
.notification.show {
    opacity: 1;
    transform: translateX(0);
}

.toast.success,
.notification.success {
    background: linear-gradient(135deg, var(--success-color) 0%, #059669 100%);
    border-left-color: rgba(255, 255, 255, 0.8);
}

.toast.error,
.notification.error {
    background: linear-gradient(135deg, var(--danger-color) 0%, #dc3545 100%);
    border-left-color: rgba(255, 255, 255, 0.8);
}

.toast.warning,
.notification.warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, #f59e0b 100%);
    border-left-color: rgba(255, 255, 255, 0.8);
}

.toast.info,
.notification.info {
    background: linear-gradient(135deg, var(--info-color) 0%, var(--primary-color) 100%);
    border-left-color: rgba(255, 255, 255, 0.8);
}

.toast-close {
    background: rgba(255, 255, 255, 0.2) !important;
    border: none !important;
    color: white !important;
    cursor: pointer;
    padding: 0.25rem 0.5rem !important;
    border-radius: 4px;
    transition: all 0.2s;
    margin-left: 0.5rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
}

.toast-close:hover {
    background: rgba(255, 255, 255, 0.3) !important;
    transform: scale(1.1);
}

.toast-close:active {
    transform: scale(0.95);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(400px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideOut {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(400px);
    }
}

/* Page */
.page {
    display: none;
}

.page.active {
    display: block;
    animation: fadeIn 0.3s ease-out;
}

/* Loading States */
.loading {
    position: relative;
    pointer-events: none;
    opacity: 0.6;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* Animations */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.pulse-animation {
    animation: pulse 0.5s ease-in-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-in {
    animation: slideIn 0.3s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

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

/* Profile Section Styles */
.profile-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--border-color);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.profile-tabs::-webkit-scrollbar {
    display: none;
}

.profile-tab {
    background: transparent;
    border: none;
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 3px solid transparent;
    transition: var(--transition);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
}

.profile-tab:hover {
    color: var(--primary-color);
    background: rgba(147, 51, 234, 0.05);
}

.profile-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    background: rgba(147, 51, 234, 0.08);
}

.profile-tab i {
    font-size: 1rem;
}

.profile-tab span {
    display: inline;
}

.profile-container {
    margin-bottom: 2rem;
}

.profile-tab-content {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.profile-tab-content.active {
    display: block;
}

/* Mobile Responsive Profile Tabs */
@media (max-width: 768px) {
    .profile-tabs {
        gap: 0.25rem;
        padding-bottom: 0.5rem;
    }
    
    .profile-tab {
        padding: 0.5rem 0.75rem;
        font-size: 0.8rem;
        flex: 1;
        min-width: 0;
    }
    
    .profile-tab span {
        display: none;
    }
    
    .profile-tab i {
        font-size: 1.1rem;
    }
    
    .profile-card {
        padding: 1.5rem;
    }
    
    .profile-card h3 {
        font-size: 1.25rem;
    }
    
    .logo-preview-container {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .logo-upload-controls {
        width: 100%;
    }
    
    .logo-upload-controls .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .profile-tabs {
        gap: 0.15rem;
    }
    
    .profile-tab {
        padding: 0.5rem 0.5rem;
        font-size: 0.75rem;
    }
    
    .profile-card {
        padding: 1rem;
    }
}

.profile-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

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

.profile-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.logo-upload-section {
    margin-bottom: 2rem;
}

.logo-preview-container {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
}

.logo-preview {
    position: relative;
}

.logo-upload-controls {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.logo-upload-controls .btn {
    width: auto;
    min-width: 150px;
}

/* Professional UI Enhancements */
.page-header {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(37, 99, 235, 0.02) 100%);
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

.page-header h1 {
    margin: 0;
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.stats-grid {
    margin-bottom: 2.5rem;
}

.stat-card {
    background: linear-gradient(135deg, var(--white) 0%, #f8fafc 100%);
    border-left: 4px solid var(--primary-color);
}

.stat-card:hover {
    border-left-width: 6px;
    transform: translateX(4px) translateY(-4px);
}

.card {
    background: linear-gradient(135deg, var(--white) 0%, #fafbfc 100%);
    border-top: 3px solid var(--primary-color);
}

.data-table {
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.data-table thead {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
}

.data-table th {
    color: var(--white);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 1.25rem 1rem;
}

.data-table tbody tr {
    transition: var(--transition);
}

.data-table tbody tr:nth-child(even) {
    background: rgba(248, 250, 252, 0.5);
}

.data-table tbody tr:hover {
    background: linear-gradient(90deg, rgba(37, 99, 235, 0.08) 0%, transparent 100%);
    transform: scale(1.01);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* Button Enhancements */
.btn {
    font-weight: 600;
    letter-spacing: 0.3px;
    text-transform: uppercase;
    font-size: 0.8125rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border: none;
}

.btn-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    border: none;
}

.btn-danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    border: none;
}

.btn-secondary {
    background: linear-gradient(135deg, #64748b 0%, #475569 100%);
    border: none;
}

/* Form Enhancements */
.form-control {
    border: 2px solid var(--border-color);
    transition: var(--transition);
    font-size: 0.9375rem;
}

input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--primary-color);
    border-radius: 4px;
}

input[type="checkbox"]:checked {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.email-option-section {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(37, 99, 235, 0.1) 100%);
    padding: 1.25rem;
    border-radius: var(--radius-sm);
    margin: 1rem 0;
    border: 2px solid rgba(37, 99, 235, 0.2);
    transition: var(--transition);
}

.email-option-section:hover {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(37, 99, 235, 0.15) 100%);
}

.email-option-section label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.email-option-section label i {
    color: var(--primary-color);
    font-size: 1.125rem;
}

.email-option-section small {
    display: block;
    margin-top: 0.75rem;
    color: var(--text-secondary);
    margin-left: 2rem;
    font-size: 0.8125rem;
    line-height: 1.5;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
    transform: translateY(-1px);
}

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.625rem;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Modal Enhancements */
.modal-content {
    background: linear-gradient(135deg, var(--white) 0%, #fafbfc 100%);
    border: 1px solid var(--border-color);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
}

.modal-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: 1.0rem 2rem;
    margin: -2.5rem -2.5rem 1.5rem -2.5rem;
    border-radius: var(--radius) var(--radius) 0 0;
}

.modal-header h3 {
    color: var(--white);
    margin: 0;
}

.modal-close {
    color: var(--white);
    font-size: 1.75rem;
    opacity: 0.9;
}

.modal-close:hover {
    opacity: 1;
    transform: rotate(90deg) scale(1.1);
}

/* Toast Notification Enhancements - Already defined above */

/* Responsive Design */
@media (max-width: 768px) {
    /* Compact spacing for mobile */
    body {
        font-size: 14px;
    }
    
    .main-container {
        padding: 0.875rem 0.75rem;
    }
    
    .page-header {
        margin-bottom: 0.875rem;
        padding-bottom: 0.625rem;
        flex-wrap: wrap;
        gap: 0.75rem;
    }
    
    .page-header h1,
    .page-header h2 {
        font-size: 1.25rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 0.75rem;
        margin-bottom: 1rem;
    }
    
    .stat-card {
        padding: 0.5rem 0.625rem;
        gap: 0.625rem;
    }
    
    .stat-icon {
        width: 44px;
        height: 44px;
        font-size: 1.25rem;
    }
    
    .stat-content h3 {
        font-size: 0.875rem;
    }
    
    .stat-content p {
        font-size: 0.7rem;
    }
    
    .charts-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
        margin-bottom: 1rem;
    }
    
    .chart-card {
        padding: 1rem;
    }
    
    .activity-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
        margin-bottom: 1rem;
    }
    
    .activity-card {
        padding: 1rem;
    }
    
    .activity-card h3 {
        font-size: 1rem;
        margin-bottom: 0.75rem;
    }
    
    .data-table th {
        padding: 0.625rem 0.5rem;
        font-size: 0.65rem;
    }
    
    .data-table td {
        padding: 0.625rem 0.5rem;
        font-size: 0.8rem;
    }
    
    .table-responsive {
        margin-bottom: 0.75rem;
    }
    
    .toast-container {
        top: 10px;
        right: 10px;
        left: 10px;
        max-width: 100%;
    }
    
    .toast,
    .notification {
        min-width: auto;
        width: 100%;
        max-width: 100%;
        padding: 0.75rem 1rem;
        font-size: 0.875rem;
    }
    
    .profile-container {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .logo-preview-container {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .logo-upload-controls {
        width: 100%;
    }
    
    .logo-upload-controls .btn {
        width: 100%;
    }
    
    /* Mobile Navigation */
    .navbar {
        padding: 0.75rem 0;
    }
    
    .nav-container {
        padding: 0 1rem;
    }
    
    .nav-brand {
        font-size: 1.5rem;
        gap: 0.5rem;
    }
    
    .nav-toggle {
        display: block;
        font-size: 1.25rem;
        padding: 0.5rem;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 60px;
        flex-direction: column;
        background: var(--white);
        width: 280px;
        height: calc(100vh - 60px);
        text-align: left;
        transition: left 0.3s ease;
        box-shadow: var(--shadow-xl);
        padding: 1rem 0;
        overflow-y: auto;
        z-index: 999;
    }

    .nav-menu.active {
        left: 0;
    }
    
    .nav-link {
        padding: 0.875rem 1.5rem;
        font-size: 0.9375rem;
        width: 100%;
        justify-content: flex-start;
    }
    
    .nav-link i {
        width: 20px;
        text-align: center;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }

    .stat-card {
        flex-direction: row;
        padding: 1rem;
        gap: 0.75rem;
    }
    
    .stat-icon {
        width: 45px;
        height: 45px;
        font-size: 1.25rem;
    }
    
    .stat-content h3 {
        font-size: 1.25rem;
    }
    
    .stat-content p {
        font-size: 0.75rem;
    }

    .charts-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .chart-card {
        padding: 1rem;
    }
    
    .chart-card h3 {
        font-size: 1rem;
        margin-bottom: 0.75rem;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    
    .form-group {
        margin-bottom: 1rem;
    }
    
    .form-group label {
        font-size: 0.8125rem;
        margin-bottom: 0.5rem;
    }
    
    .form-control {
        padding: 0.625rem;
        font-size: 0.9375rem;
    }

    .invoice-item > div:first-child {
        grid-template-columns: 1fr !important;
        gap: 0.75rem;
    }

    .invoice-item > div:first-child > div {
        margin-bottom: 0.75rem;
    }

    .modal-content {
        margin: 0.5rem;
        padding: 1.25rem;
        max-height: 95vh;
        overflow-y: auto;
    }
    
    .modal-header {
        padding: 1rem 1.25rem;
        margin: -1.25rem -1.25rem 1rem -1.25rem;
    }
    
    .modal-header h3 {
        font-size: 1.125rem;
    }

    .chart-card canvas {
        max-height: 250px;
    }

    .btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.875rem;
    }
    
    .btn-sm {
        padding: 0.5rem 1rem;
        font-size: 0.75rem;
    }

    .btn-group {
        flex-direction: column;
        gap: 0.5rem;
    }

    .btn-group .btn {
        width: 100%;
    }

    .data-table {
        font-size: 0.8125rem;
    }

    .data-table th,
    .data-table td {
        padding: 0.5rem 0.375rem;
    }
    
    .table-responsive {
        margin: 0 -1rem;
        padding: 0 1rem;
    }
    
    .page-filters {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .page-filters .form-control,
    .page-filters .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 13px;
    }
    
    .main-container {
        padding: 0.75rem;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
        margin-bottom: 1rem;
    }

    .page-header h1,
    .page-header h2 {
        font-size: 1.25rem;
    }
    
    .page-header .btn {
        width: 100%;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 0.625rem;
    }
    
    .stat-card {
        padding: 0.875rem;
    }
    
    .stat-icon {
        width: 40px;
        height: 40px;
        font-size: 1.125rem;
    }
    
    .stat-content h3 {
        font-size: 1.125rem;
    }
    
    .nav-menu {
        width: 100%;
    }
    
    .modal-content {
        margin: 0.25rem;
        padding: 1rem;
    }
    
    .data-table {
        font-size: 0.75rem;
    }
    
    .data-table th,
    .data-table td {
        padding: 0.375rem 0.25rem;
    }
}