/* ===================================
   Variables & Reset
   =================================== */
:root {
    --primary: #667eea;
    --primary-dark: #5568d3;
    --secondary: #764ba2;
    --success: #43e97b;
    --danger: #f5576c;
    --warning: #ffa500;
    --info: #4facfe;
    --dark: #1a202c;
    --light: #f7fafc;
    --gray: #718096;
    --gray-light: #e2e8f0;
    --white: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --radius: 12px;
    --transition: all 0.3s ease;
}

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

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

/* ===================================
   Header & Navigation
   =================================== */
.header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
}

.logo i {
    font-size: 32px;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--primary);
    cursor: pointer;
    padding: 8px;
}

.nav-tabs {
    background: var(--white);
    border-bottom: 2px solid var(--gray-light);
}

.nav-tabs-content {
    display: flex;
    gap: 5px;
    overflow-x: auto;
    padding: 10px 0;
    scrollbar-width: none;
}

.nav-tabs-content::-webkit-scrollbar {
    display: none;
}

.nav-tab {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: none;
    border: none;
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 500;
    color: var(--gray);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.nav-tab:hover {
    background: var(--light);
    color: var(--primary);
}

.nav-tab.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--white);
}

.nav-tab i {
    font-size: 18px;
}

/* ===================================
   Main Content
   =================================== */
.main-content {
    padding: 30px 0;
    min-height: calc(100vh - 200px);
}

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

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

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

.section-header {
    text-align: center;
    margin-bottom: 30px;
    color: var(--white);
}

.section-header h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 10px;
}

.section-header p {
    font-size: 16px;
    opacity: 0.9;
}

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

.stat-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--white);
}

.stat-info h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 4px;
}

.stat-info p {
    font-size: 14px;
    color: var(--gray);
}

/* ===================================
   Form Styles
   =================================== */
.form-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow-lg);
}

/* OCR Upload Section */
.ocr-upload-section {
    margin-bottom: 30px;
}

.upload-area {
    border: 3px dashed var(--gray-light);
    border-radius: var(--radius);
    padding: 40px 20px;
    text-align: center;
    background: var(--light);
    transition: var(--transition);
    cursor: pointer;
}

.upload-area:hover {
    border-color: var(--primary);
    background: #f0f4ff;
}

.upload-area i {
    font-size: 48px;
    color: var(--primary);
    margin-bottom: 15px;
}

.upload-area h3 {
    font-size: 20px;
    color: var(--dark);
    margin-bottom: 8px;
}

.upload-area p {
    color: var(--gray);
    margin-bottom: 5px;
}

.upload-hint {
    font-size: 13px;
    color: var(--primary);
    font-weight: 500;
}

.upload-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 15px;
}

.btn-upload {
    padding: 12px 30px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--white);
    border: none;
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

.btn-upload i {
    font-size: 16px;
}

.btn-scanner {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

/* Scanner Modal */
.scanner-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.scanner-container {
    background: var(--dark);
    border-radius: var(--radius);
    width: 100%;
    max-width: 800px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

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

.scanner-header h3 {
    color: var(--white);
    font-size: 20px;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.scanner-close {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: var(--white);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.scanner-close:hover {
    background: rgba(255, 255, 255, 0.3);
}

.scanner-body {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.video-container {
    position: relative;
    background: #000;
    border-radius: var(--radius);
    overflow: hidden;
    aspect-ratio: 4/3;
    max-height: 500px;
}

#scannerVideo {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.scanner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.scanner-frame {
    width: 80%;
    max-width: 400px;
    aspect-ratio: 3/4;
    border: 3px solid var(--success);
    border-radius: 12px;
    box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.5);
    position: relative;
    animation: pulse 2s ease-in-out infinite;
}

.scanner-frame::before,
.scanner-frame::after {
    content: '';
    position: absolute;
    width: 30px;
    height: 30px;
    border: 4px solid var(--success);
}

.scanner-frame::before {
    top: -4px;
    left: -4px;
    border-right: none;
    border-bottom: none;
}

.scanner-frame::after {
    bottom: -4px;
    right: -4px;
    border-left: none;
    border-top: none;
}

.scanner-hint {
    position: absolute;
    bottom: 20px;
    text-align: center;
    background: rgba(0, 0, 0, 0.8);
    padding: 15px 20px;
    border-radius: 8px;
}

.scanner-hint p {
    color: var(--white);
    margin: 0;
    font-size: 16px;
    font-weight: 600;
}

.scanner-hint .hint-small {
    font-size: 13px;
    font-weight: 400;
    color: var(--gray-light);
    margin-top: 5px;
}

.scanner-controls {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.btn-scanner-action {
    padding: 15px 40px;
    background: var(--success);
    color: var(--white);
    border: none;
    border-radius: var(--radius);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-scanner-action:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(67, 233, 123, 0.4);
}

.btn-scanner-action.btn-secondary {
    background: var(--gray);
}

.btn-scanner-action.btn-secondary:hover {
    box-shadow: 0 6px 20px rgba(113, 128, 150, 0.4);
}

.scanner-status {
    text-align: center;
    padding: 12px 20px;
    background: rgba(102, 126, 234, 0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: var(--white);
}

.scanner-status i {
    color: var(--primary);
    font-size: 18px;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.5), 0 0 20px rgba(67, 233, 123, 0.5);
    }
    50% {
        box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.5), 0 0 40px rgba(67, 233, 123, 0.8);
    }
}

/* OCR Processing Indicator */
.ocr-processing {
    text-align: center;
    padding: 40px 20px;
    background: var(--light);
    border-radius: var(--radius);
    margin-top: 20px;
}

.spinner {
    width: 50px;
    height: 50px;
    margin: 0 auto 20px;
    border: 4px solid var(--gray-light);
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.ocr-processing p {
    font-size: 16px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 8px;
}

.ocr-processing small {
    font-size: 13px;
    color: var(--gray);
}

/* Image Preview */
.image-preview {
    position: relative;
    margin-top: 20px;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.image-preview img {
    width: 100%;
    max-height: 400px;
    object-fit: contain;
    background: var(--dark);
}

.btn-remove-image {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 36px;
    height: 36px;
    background: var(--danger);
    color: var(--white);
    border: none;
    border-radius: 50%;
    font-size: 16px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-remove-image:hover {
    transform: scale(1.1);
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 8px;
}

.form-group label i {
    color: var(--primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--gray-light);
    border-radius: var(--radius);
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group textarea {
    resize: vertical;
}

.form-actions {
    display: flex;
    gap: 15px;
    justify-content: flex-end;
    margin-top: 30px;
}

/* ===================================
   Buttons
   =================================== */
.btn-primary,
.btn-secondary,
.btn-danger {
    padding: 12px 30px;
    border: none;
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

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

.btn-secondary {
    background: var(--gray-light);
    color: var(--dark);
}

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

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

.btn-danger:hover {
    background: #e04555;
}

/* ===================================
   Filters Section
   =================================== */
.filters-section {
    background: var(--white);
    padding: 20px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    box-shadow: var(--shadow);
}

.search-box {
    position: relative;
    margin-bottom: 15px;
}

.search-box i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray);
}

.search-box input {
    width: 100%;
    padding: 12px 16px 12px 45px;
    border: 2px solid var(--gray-light);
    border-radius: var(--radius);
    font-size: 15px;
    transition: var(--transition);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary);
}

.filter-controls {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.filter-controls select {
    flex: 1;
    min-width: 150px;
    padding: 12px 16px;
    border: 2px solid var(--gray-light);
    border-radius: var(--radius);
    font-size: 14px;
    cursor: pointer;
}

.view-toggle {
    padding: 12px 20px;
    background: var(--light);
    border: 2px solid var(--gray-light);
    border-radius: var(--radius);
    font-size: 18px;
    color: var(--primary);
    cursor: pointer;
    transition: var(--transition);
}

.view-toggle:hover {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

/* ===================================
   Notes Grid
   =================================== */
.notes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.notes-grid.list-view {
    grid-template-columns: 1fr;
}

.note-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
}

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

.note-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--gray-light);
}

.note-content {
    padding: 20px;
}

.note-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 12px;
}

.note-number {
    font-size: 12px;
    font-weight: 600;
    color: var(--gray);
}

.note-category {
    font-size: 20px;
}

.note-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 8px;
}

.note-info {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 14px;
    color: var(--gray);
}

.note-info i {
    margin-right: 6px;
    color: var(--primary);
}

.note-value {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    margin-top: 12px;
}

/* ===================================
   Export Section
   =================================== */
.export-section {
    background: var(--white);
    border-radius: var(--radius);
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: var(--shadow);
}

.export-section h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.export-section h3 i {
    color: var(--primary);
}

.export-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.btn-export {
    flex: 1;
    min-width: 150px;
    padding: 14px 24px;
    background: var(--white);
    border: 2px solid var(--gray-light);
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 600;
    color: var(--dark);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-export i {
    font-size: 18px;
}

.btn-export:nth-child(1):hover {
    background: #e74c3c;
    color: var(--white);
    border-color: #e74c3c;
}

.btn-export:nth-child(2):hover {
    background: #27ae60;
    color: var(--white);
    border-color: #27ae60;
}

.btn-export:nth-child(3):hover {
    background: #3498db;
    color: var(--white);
    border-color: #3498db;
}

/* Google Drive Backup Styles */
.drive-status-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding: 15px;
    background: var(--light);
    border-radius: var(--radius);
    flex-wrap: wrap;
    gap: 15px;
}

.drive-status {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 500;
}

.drive-status i {
    font-size: 16px;
}

.drive-auto-backup {
    display: flex;
    align-items: center;
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    user-select: none;
}

.toggle-label input[type="checkbox"] {
    width: 40px;
    height: 20px;
    cursor: pointer;
}

.toggle-label input[type="checkbox"]:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.toggle-label span {
    font-size: 14px;
    font-weight: 500;
    color: var(--dark);
}

.backup-info {
    margin-top: 10px;
    text-align: center;
}

.backup-info small {
    font-size: 12px;
    color: var(--gray);
    font-style: italic;
}

/* ===================================
   Charts & Reports
   =================================== */
.period-filter {
    display: flex;
    gap: 10px;
    margin-bottom: 25px;
    flex-wrap: wrap;
}

.period-btn {
    padding: 10px 20px;
    background: var(--white);
    border: 2px solid var(--gray-light);
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 600;
    color: var(--dark);
    cursor: pointer;
    transition: var(--transition);
}

.period-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.period-btn.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--white);
    border-color: transparent;
}

.report-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 25px;
}

.summary-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.summary-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.summary-icon {
    width: 50px;
    height: 50px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--white);
    flex-shrink: 0;
}

.summary-info {
    flex: 1;
}

.summary-info h4 {
    font-size: 20px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 4px;
}

.summary-info p {
    font-size: 12px;
    color: var(--gray);
    margin: 0;
}

.charts-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-bottom: 25px;
}

.chart-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 25px;
    box-shadow: var(--shadow);
}

.chart-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 20px;
}

.chart-card canvas {
    max-height: 300px;
}

.category-breakdown {
    background: var(--white);
    border-radius: var(--radius);
    padding: 25px;
    box-shadow: var(--shadow);
}

.category-breakdown h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 20px;
}

.category-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    border-radius: var(--radius);
    margin-bottom: 12px;
    background: var(--light);
    transition: var(--transition);
}

.category-item:hover {
    background: var(--gray-light);
}

.category-icon {
    font-size: 24px;
}

.category-details {
    flex: 1;
}

.category-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--dark);
}

.category-stats {
    font-size: 13px;
    color: var(--gray);
    margin-top: 4px;
}

.category-amount {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
}

/* ===================================
   Modal
   =================================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--white);
    border-radius: var(--radius);
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: modalSlideIn 0.3s ease;
}

.modal-small {
    max-width: 400px;
}

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

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

.modal-header h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--dark);
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--gray);
    cursor: pointer;
    transition: var(--transition);
    padding: 5px;
}

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

.modal-body {
    padding: 25px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 15px;
    padding: 20px 25px;
    border-top: 2px solid var(--gray-light);
}

.warning-text {
    color: var(--danger);
    font-weight: 500;
    margin-top: 10px;
}

/* ===================================
   Toast Notification
   =================================== */
.toast {
    position: fixed;
    bottom: -100px;
    right: 20px;
    background: var(--white);
    padding: 16px 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    transition: bottom 0.3s ease;
}

.toast.show {
    bottom: 20px;
}

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

.toast-content i {
    font-size: 20px;
    color: var(--success);
}

.toast-content span {
    font-size: 15px;
    font-weight: 500;
    color: var(--dark);
}

/* ===================================
   Install Prompt
   =================================== */
.install-prompt {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--white);
    border-radius: var(--radius);
    padding: 16px 20px;
    box-shadow: var(--shadow-lg);
    z-index: 1500;
    max-width: 90%;
    width: 400px;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        bottom: -100px;
        opacity: 0;
    }
    to {
        bottom: 20px;
        opacity: 1;
    }
}

.install-content {
    display: flex;
    align-items: center;
    gap: 15px;
}

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

.install-content strong {
    display: block;
    font-size: 15px;
    color: var(--dark);
}

.install-content p {
    font-size: 13px;
    color: var(--gray);
}

.btn-install {
    padding: 8px 20px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--white);
    border: none;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
}

.btn-close-prompt {
    background: none;
    border: none;
    color: var(--gray);
    font-size: 18px;
    cursor: pointer;
    padding: 5px;
}

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

.empty-state i {
    font-size: 64px;
    margin-bottom: 20px;
    opacity: 0.3;
}

.empty-state p {
    font-size: 16px;
    margin-bottom: 20px;
}

.recent-notes {
    background: var(--white);
    border-radius: var(--radius);
    padding: 25px;
    box-shadow: var(--shadow);
}

.recent-notes h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 20px;
}

.notes-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

/* ===================================
   Settings Section
   =================================== */
.settings-section {
    margin-bottom: 30px;
}

.settings-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
}

.settings-header {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--gray-light);
}

.settings-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: var(--white);
    flex-shrink: 0;
}

.settings-info h3 {
    font-size: 24px;
    color: var(--dark);
    margin-bottom: 5px;
}

.settings-info p {
    color: var(--gray);
    font-size: 14px;
}

.backup-status {
    background: var(--light);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 25px;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
    font-size: 14px;
    color: var(--dark);
}

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

.status-item i {
    color: var(--primary);
    font-size: 16px;
}

.status-item strong {
    color: var(--primary);
}

.backup-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 30px;
}

.backup-actions .btn {
    flex: 1;
    min-width: 200px;
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.backup-actions .btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
}

.backup-actions .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(102, 126, 234, 0.3);
}

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

.backup-actions .btn-secondary:hover {
    background: var(--dark);
}

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

.backup-actions .btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(67, 233, 123, 0.3);
}

.backup-actions .btn-info {
    background: var(--info);
    color: var(--white);
}

.backup-actions .btn-info:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(79, 172, 254, 0.3);
}

.backup-actions .btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.backup-info {
    background: var(--light);
    border-radius: 8px;
    padding: 20px;
}

.backup-info h4 {
    font-size: 16px;
    color: var(--dark);
    margin-bottom: 15px;
}

.backup-info ul {
    list-style: none;
    margin-bottom: 20px;
}

.backup-info ul li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
    color: var(--dark);
    font-size: 14px;
}

.backup-info ul li i {
    color: var(--success);
    font-size: 16px;
}

.alert {
    padding: 15px;
    border-radius: 8px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.alert i {
    font-size: 20px;
    flex-shrink: 0;
    margin-top: 2px;
}

.alert-info {
    background: #e6f7ff;
    border: 1px solid #91d5ff;
    color: #0050b3;
}

.alert-info i {
    color: #1890ff;
}

.app-info {
    padding: 20px;
    background: var(--light);
    border-radius: 8px;
}

.app-info p {
    margin-bottom: 10px;
    color: var(--dark);
    font-size: 14px;
}

.app-info p:last-child {
    margin-bottom: 0;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }

    .nav-tabs-content {
        gap: 5px;
    }

    .nav-tab {
        padding: 10px 16px;
        font-size: 14px;
    }

    .nav-tab span {
        display: none;
    }

    .nav-tab i {
        font-size: 20px;
    }

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

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

    .form-actions {
        flex-direction: column;
    }

    .form-actions button {
        width: 100%;
    }

    .filter-controls {
        flex-direction: column;
    }

    .filter-controls select,
    .view-toggle {
        width: 100%;
    }

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

    .charts-container {
        grid-template-columns: 1fr;
    }

    .export-buttons {
        flex-direction: column;
    }

    .btn-export {
        width: 100%;
    }

    .period-filter {
        justify-content: center;
    }

    .section-header h2 {
        font-size: 24px;
    }

    .modal-content {
        max-width: 95%;
    }

    .install-prompt {
        max-width: 95%;
    }
    
    .settings-header {
        flex-direction: column;
        text-align: center;
    }
    
    .settings-icon {
        margin: 0 auto;
    }
    
    .backup-actions {
        flex-direction: column;
    }
    
    .backup-actions .btn {
        width: 100%;
        min-width: 100%;
    }
    
    .upload-buttons {
        flex-direction: column;
    }
    
    .btn-upload {
        width: 100%;
    }
    
    .scanner-modal {
        padding: 10px;
    }
    
    .scanner-container {
        max-height: 95vh;
    }
    
    .scanner-header {
        padding: 15px;
    }
    
    .scanner-header h3 {
        font-size: 16px;
    }
    
    .scanner-body {
        padding: 15px;
    }
    
    .scanner-frame {
        width: 90%;
    }
    
    .scanner-controls {
        flex-direction: column;
    }
    
    .btn-scanner-action {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .logo {
        font-size: 20px;
    }

    .logo i {
        font-size: 28px;
    }

    .form-card {
        padding: 20px;
    }

    .stat-card {
        padding: 16px;
    }

    .stat-icon {
        width: 50px;
        height: 50px;
        font-size: 20px;
    }

    .stat-info h3 {
        font-size: 20px;
    }
}