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

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #8b5cf6;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --dark: #1e293b;
    --light: #f8fafc;
    --white: #ffffff;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px 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);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--dark);
    line-height: 1.6;
}

/* Navigation */
.navbar {
    background: var(--white);
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 5px;
}

.nav-link {
    text-decoration: none;
    color: var(--gray-600);
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link:hover {
    background: var(--gray-100);
    color: var(--primary);
}

.nav-link.active {
    background: var(--primary);
    color: var(--white);
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 30px 20px;
}

.page-header {
    text-align: center;
    color: var(--white);
    margin-bottom: 40px;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.page-header p {
    font-size: 1.1rem;
    opacity: 0.95;
}

/* Card */
.card {
    background: var(--white);
    border-radius: 16px;
    padding: 30px;
    box-shadow: var(--shadow-xl);
    margin-bottom: 30px;
    animation: fadeIn 0.5s ease;
}

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

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--gray-200);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Form */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.form-label .required {
    color: var(--danger);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--gray-300);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
    background: var(--white);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-control:disabled {
    background: var(--gray-100);
    cursor: not-allowed;
}

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

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

.file-input-wrapper {
    position: relative;
    overflow: hidden;
    display: inline-block;
    width: 100%;
}

.file-input-wrapper input[type="file"] {
    position: absolute;
    left: -9999px;
}

.file-input-label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--gray-100);
    border: 2px dashed var(--gray-300);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    color: var(--gray-600);
}

.file-input-label:hover {
    background: var(--gray-200);
    border-color: var(--primary);
    color: var(--primary);
}

.file-preview {
    margin-top: 10px;
    max-width: 300px;
}

.file-preview img {
    width: 100%;
    border-radius: 8px;
    border: 2px solid var(--gray-300);
}

/* Expenses Section */
.expenses-section {
    background: var(--gray-100);
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 20px;
}

.expense-item {
    background: var(--white);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 15px;
    border: 1px solid var(--gray-300);
}

.expense-item:last-child {
    margin-bottom: 0;
}

.expense-item-main {
    display: grid;
    grid-template-columns: 2fr 1fr auto;
    gap: 15px;
    margin-bottom: 10px;
    align-items: end;
}

.expense-photo-section {
    padding-top: 10px;
    border-top: 1px solid var(--gray-200);
}

.file-input-label-small {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--gray-100);
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--gray-600);
}

.file-input-label-small:hover {
    background: var(--gray-200);
    border-color: var(--primary);
    color: var(--primary);
}

.expense-photo-preview {
    margin-top: 10px;
    position: relative;
    max-width: 200px;
}

.expense-photo-preview img {
    width: 100%;
    border-radius: 6px;
    border: 2px solid var(--gray-300);
}

.btn-remove-photo {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--danger);
    color: var(--white);
    border: 2px solid var(--white);
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 12px;
    font-weight: bold;
    transition: all 0.3s ease;
}

.btn-remove-photo:hover {
    background: #dc2626;
    transform: scale(1.1);
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-decoration: none;
    font-family: inherit;
}

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

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-success:hover:not(:disabled) {
    background: #059669;
    transform: translateY(-2px);
}

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

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
    transform: translateY(-2px);
}

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

.btn-warning:hover:not(:disabled) {
    background: #d97706;
}

.btn-secondary {
    background: var(--gray-500);
    color: var(--white);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--gray-600);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover:not(:disabled) {
    background: var(--primary);
    color: var(--white);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.9rem;
}

.btn-icon {
    padding: 10px;
    width: 40px;
    height: 40px;
}

.btn-group {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--white);
    padding: 25px;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.stat-card.success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.stat-card.warning {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.stat-card.danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.95;
    margin-bottom: 10px;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
}

/* Records List */
.records-grid {
    display: grid;
    gap: 20px;
}

.record-card {
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: 12px;
    padding: 25px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.record-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.record-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--gray-200);
}

.record-date {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary);
}

.record-actions {
    display: flex;
    gap: 10px;
}

.record-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.detail-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.detail-label {
    font-size: 0.85rem;
    color: var(--gray-500);
    font-weight: 500;
}

.detail-value {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--dark);
}

.detail-value.positive {
    color: var(--success);
}

.detail-value.negative {
    color: var(--danger);
}

.record-notes {
    margin-top: 15px;
    padding: 15px;
    background: var(--gray-100);
    border-radius: 8px;
    border-left: 4px solid var(--primary);
}

/* Filter Section */
.filter-section {
    background: var(--gray-100);
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 30px;
}

.filter-row {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    align-items: end;
}

.filter-row .form-group {
    flex: 1;
    min-width: 200px;
    margin-bottom: 0;
}

/* Toast Notification */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background: var(--white);
    padding: 16px 24px;
    border-radius: 8px;
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 300px;
    animation: slideIn 0.3s ease;
}

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

.toast.success {
    border-left: 4px solid var(--success);
}

.toast.error {
    border-left: 4px solid var(--danger);
}

.toast.warning {
    border-left: 4px solid var(--warning);
}

.toast-icon {
    font-size: 1.5rem;
}

.toast-message {
    flex: 1;
    font-weight: 500;
}

/* Loading Spinner */
.spinner {
    border: 3px solid var(--gray-200);
    border-top: 3px solid var(--primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 40px auto;
}

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

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--gray-500);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.empty-state-text {
    font-size: 1rem;
    margin-bottom: 20px;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        height: auto;
        padding: 15px 20px;
        gap: 15px;
    }
    
    .nav-menu {
        flex-direction: column;
        width: 100%;
    }
    
    .nav-link {
        width: 100%;
        justify-content: center;
    }
    
    .page-header h1 {
        font-size: 1.8rem;
    }
    
    .card {
        padding: 20px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .expense-item-main {
        grid-template-columns: 1fr;
    }
    
    .expense-photo-preview {
        max-width: 100%;
    }
    
    .btn-group {
        flex-direction: column;
    }
    
    .btn-group .btn {
        width: 100%;
    }
    
    .filter-row {
        flex-direction: column;
    }
    
    .filter-row .form-group {
        width: 100%;
    }
    
    .toast-container {
        left: 10px;
        right: 10px;
        width: auto;
    }
    
    .toast {
        min-width: auto;
    }
}

/* Analytics Page Styles */
.analytics-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.summary-card {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--white);
    padding: 25px;
    border-radius: 12px;
    display: flex;
    gap: 20px;
    align-items: center;
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s ease;
}

.summary-card:hover {
    transform: translateY(-5px);
}

.summary-card.success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.summary-card.warning {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.summary-card.danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

.summary-card.info {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
}

.summary-icon {
    font-size: 3rem;
    opacity: 0.9;
}

.summary-content {
    flex: 1;
}

.summary-label {
    font-size: 0.9rem;
    opacity: 0.95;
    margin-bottom: 8px;
}

.summary-value {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 5px;
}

.summary-sub {
    font-size: 0.85rem;
    opacity: 0.85;
}

/* Charts */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.chart-card {
    min-height: 400px;
}

.chart-title {
    color: var(--text-primary);
    margin-bottom: 20px;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Analytics Table */
.table-responsive {
    overflow-x: auto;
}

.analytics-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.analytics-table thead {
    background: var(--gray-100);
}

.analytics-table th,
.analytics-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.analytics-table th {
    font-weight: 600;
    color: var(--text-primary);
}

.analytics-table tbody tr:hover {
    background: var(--gray-100);
}

.analytics-table .positive {
    color: var(--success-color);
    font-weight: 600;
}

.analytics-table .negative {
    color: var(--danger-color);
    font-weight: 600;
}

.trend-up {
    color: var(--success-color);
    font-weight: 600;
}

.trend-up::before {
    content: '📈 ';
}

.trend-down {
    color: var(--danger-color);
    font-weight: 600;
}

.trend-down::before {
    content: '📉 ';
}

.trend-stable {
    color: var(--gray-500);
}

.trend-stable::before {
    content: '➡️ ';
}

/* Top Expenses */
.top-expenses-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 20px;
}

.top-expense-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: var(--gray-100);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.top-expense-item:hover {
    background: var(--gray-200);
    transform: translateX(5px);
}

.expense-rank {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    min-width: 50px;
    text-align: center;
}

.expense-details {
    flex: 1;
}

.expense-name {
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 5px;
}

.expense-date {
    font-size: 0.85rem;
    color: var(--gray-500);
}

.expense-amount {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--danger-color);
}

/* Detailed Stats */
.stats-grid-detailed {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.stat-detail-item {
    padding: 20px;
    background: var(--gray-100);
    border-radius: 8px;
    text-align: center;
}

.stat-detail-label {
    font-size: 0.9rem;
    color: var(--gray-600);
    margin-bottom: 10px;
}

.stat-detail-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-detail-value.positive {
    color: var(--success-color);
}

.stat-detail-value.negative {
    color: var(--danger-color);
}

/* Monthly Expenses Page */
.monthly-expenses-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.month-group {
    border: 2px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
}

.month-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--white);
    padding: 20px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.month-header h3 {
    margin: 0;
    font-size: 1.3rem;
}

.month-total {
    font-size: 1.5rem;
    font-weight: 700;
}

.month-expenses {
    padding: 20px;
    background: var(--bg-color);
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.monthly-expense-card {
    background: var(--white);
    padding: 20px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.monthly-expense-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow);
    transform: translateX(5px);
}

.expense-info {
    flex: 1;
}

.expense-name-large {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.expense-note {
    font-size: 0.9rem;
    color: var(--gray-500);
    margin-top: 5px;
}

.expense-actions-group {
    display: flex;
    align-items: center;
    gap: 20px;
}

.expense-amount-large {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--danger-color);
}

.expense-buttons {
    display: flex;
    gap: 10px;
}

/* Responsive Analytics */
@media (max-width: 768px) {
    .charts-grid {
        grid-template-columns: 1fr;
    }
    
    .analytics-summary {
        grid-template-columns: 1fr;
    }
    
    .summary-card {
        flex-direction: column;
        text-align: center;
    }
    
    .analytics-table {
        font-size: 0.85rem;
    }
    
    .analytics-table th,
    .analytics-table td {
        padding: 10px;
    }
    
    .stats-grid-detailed {
        grid-template-columns: 1fr;
    }
    
    .monthly-expense-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .expense-actions-group {
        width: 100%;
        justify-content: space-between;
    }
    
    .month-header {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .btn,
    .filter-section {
        display: none !important;
    }
    
    body {
        background: white;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
        page-break-inside: avoid;
    }
    
    .charts-grid {
        grid-template-columns: 1fr;
    }
}