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

:root {
    --md-primary: #6750A4;
    --md-primary-container: #EADDFF;
    --md-on-primary: #FFFFFF;
    --md-on-primary-container: #21005D;
    --md-secondary: #625B71;
    --md-secondary-container: #E8DEF8;
    --md-on-secondary-container: #1D192B;
    --md-tertiary: #7D5260;
    --md-surface: #FFFBFE;
    --md-surface-variant: #E7E0EC;
    --md-on-surface: #1C1B1F;
    --md-on-surface-variant: #49454F;
    --md-outline: #79747E;
    --md-outline-variant: #CAC4D0;
    --md-error: #B3261E;
    --md-error-container: #F9DEDC;
    --md-elevation-1: 0 1px 3px 1px rgba(0, 0, 0, 0.15);
    --md-elevation-2: 0 2px 6px 2px rgba(0, 0, 0, 0.15);
    --md-elevation-3: 0 4px 8px 3px rgba(0, 0, 0, 0.15);
}

body {
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    background: var(--md-surface);
    color: var(--md-on-surface);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
}

/* Header */
.header {
    background: var(--md-surface);
    border-bottom: 1px solid var(--md-outline-variant);
    padding: 16px 0;
    box-shadow: var(--md-elevation-1);
}

.logo {
    font-size: 24px;
    font-weight: 500;
    color: var(--md-primary);
    margin-bottom: 2px;
    letter-spacing: 0;
}

.tagline {
    color: var(--md-on-surface-variant);
    font-size: 13px;
    font-weight: 400;
}

/* Main */
.main {
    flex: 1;
    padding: 24px 0;
}

/* Steps Section */
.steps-section {
    margin-bottom: 32px;
}

.steps-title {
    font-size: 22px;
    font-weight: 500;
    text-align: center;
    color: var(--md-on-surface);
    margin-bottom: 20px;
    letter-spacing: 0;
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 32px;
}

.step-card {
    background: var(--md-surface);
    border: 1px solid var(--md-outline-variant);
    border-radius: 12px;
    padding: 20px 16px;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

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

.step-icon-wrapper {
    width: 48px;
    height: 48px;
    background: var(--md-primary-container);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
}

.step-icon {
    color: var(--md-on-primary-container);
    width: 24px;
    height: 24px;
}

.step-number {
    position: absolute;
    top: 12px;
    right: 12px;
    font-size: 28px;
    font-weight: 700;
    color: var(--md-surface-variant);
    line-height: 1;
}

.step-title {
    font-size: 16px;
    font-weight: 500;
    color: var(--md-on-surface);
    margin-bottom: 6px;
    letter-spacing: 0;
}

.step-description {
    font-size: 12px;
    color: var(--md-on-surface-variant);
    line-height: 1.4;
    font-weight: 400;
}

/* Upload Area */
.upload-area {
    background: var(--md-surface);
    border: 2px dashed var(--md-outline);
    border-radius: 16px;
    padding: 40px 32px;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.upload-area:hover {
    border-color: var(--md-primary);
    background: var(--md-primary-container);
    box-shadow: var(--md-elevation-1);
}

.upload-icon {
    color: var(--md-primary);
    margin-bottom: 16px;
    width: 48px;
    height: 48px;
}

.upload-area h2 {
    font-size: 20px;
    font-weight: 400;
    margin-bottom: 8px;
    color: var(--md-on-surface);
    letter-spacing: 0;
}

.upload-description {
    color: var(--md-on-surface-variant);
    margin-bottom: 24px;
    font-size: 13px;
    font-weight: 400;
}

.security-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #dcfce7;
    border: 1px solid #86efac;
    color: #166534;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 24px;
}

.security-badge svg {
    width: 16px;
    height: 16px;
}

#pdfUpload {
    display: none;
}

.upload-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    background: var(--md-primary);
    color: var(--md-on-primary);
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    box-shadow: var(--md-elevation-1);
    letter-spacing: 0.1px;
}

.upload-btn:hover {
    box-shadow: var(--md-elevation-2);
    transform: translateY(-1px);
}

.upload-btn:active {
    transform: translateY(0);
}

.upload-hint {
    margin-top: 16px;
    color: var(--md-on-surface-variant);
    font-size: 14px;
    font-weight: 400;
}

/* Work Area */
.work-area {
    animation: fadeIn 0.5s;
    display: flex;
    gap: 0;
}

/* Search Sidebar */
.search-sidebar {
    width: 320px;
    background: var(--md-surface);
    border-right: 1px solid var(--md-outline-variant);
    display: flex;
    flex-direction: column;
    max-height: calc(100vh - 200px);
    position: sticky;
    top: 80px;
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    border-bottom: 1px solid var(--md-outline-variant);
}

.sidebar-header h3 {
    font-size: 18px;
    font-weight: 500;
    color: var(--md-on-surface);
    margin: 0;
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.search-results-count {
    font-size: 13px;
    color: var(--md-on-surface-variant);
    font-weight: 500;
    padding: 8px 0;
}

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

/* Main Content Area */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

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

.toolbar {
    background: var(--md-surface);
    border-radius: 16px;
    padding: 16px 24px;
    margin-bottom: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--md-elevation-2);
    border: 1px solid var(--md-outline-variant);
}

.toolbar-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.toolbar-right {
    display: flex;
    gap: 12px;
}

.page-info {
    color: var(--md-on-surface-variant);
    font-size: 14px;
    font-weight: 500;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: 0.1px;
}

.btn svg {
    flex-shrink: 0;
}

.btn-primary {
    background: var(--md-primary);
    color: var(--md-on-primary);
    box-shadow: var(--md-elevation-1);
}

.btn-primary:hover {
    box-shadow: var(--md-elevation-2);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--md-secondary-container);
    color: var(--md-on-secondary-container);
    border: 1px solid var(--md-outline);
}

.btn-secondary:hover {
    box-shadow: var(--md-elevation-1);
    transform: translateY(-1px);
}

.btn-tertiary {
    background: var(--md-surface);
    color: var(--md-primary);
    border: 1px solid var(--md-primary);
}

.btn-tertiary:hover {
    background: var(--md-primary-container);
    box-shadow: var(--md-elevation-1);
    transform: translateY(-1px);
}

.icon-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.2s;
}

.icon-btn:hover {
    background: var(--md-surface-variant);
}

/* Search Panel */
.search-panel {
    background: var(--md-surface);
    border: 1px solid var(--md-outline-variant);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 24px;
    box-shadow: var(--md-elevation-2);
}

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

.search-header h3 {
    font-size: 18px;
    font-weight: 500;
    color: var(--md-on-surface);
    margin: 0;
}

.search-content {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.search-input-group {
    display: flex;
    gap: 12px;
}

.search-input {
    flex: 1;
    padding: 10px 16px;
    border: 1px solid var(--md-outline);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    background: var(--md-surface);
    color: var(--md-on-surface);
}

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

.search-presets {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.preset-btn {
    padding: 6px 12px;
    background: var(--md-secondary-container);
    color: var(--md-on-secondary-container);
    border: 1px solid var(--md-outline);
    border-radius: 16px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.preset-btn:hover {
    background: var(--md-primary-container);
    border-color: var(--md-primary);
}

.search-results {
    padding: 12px;
    background: var(--md-primary-container);
    border-radius: 8px;
    text-align: center;
}

.search-results p {
    margin-bottom: 12px;
    color: var(--md-on-primary-container);
    font-weight: 500;
}

.search-results-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.search-result-item {
    background: var(--md-surface);
    border: 1px solid var(--md-outline-variant);
    border-radius: 8px;
    padding: 12px;
    transition: all 0.2s;
    cursor: pointer;
}

.search-result-item:hover {
    border-color: var(--md-primary);
    box-shadow: var(--md-elevation-1);
    background: var(--md-primary-container);
}

.search-result-item.active {
    border-color: var(--md-primary);
    background: var(--md-primary-container);
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.result-page {
    font-size: 12px;
    font-weight: 600;
    color: var(--md-primary);
}

.result-actions {
    display: flex;
    gap: 4px;
}

.result-btn {
    width: 24px;
    height: 24px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 700;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.accept-btn {
    background: #dcfce7;
    color: #166534;
}

.accept-btn:hover {
    background: #86efac;
}

.reject-btn {
    background: #fee2e2;
    color: #991b1b;
}

.reject-btn:hover {
    background: #fca5a5;
}

.result-context {
    font-size: 13px;
    color: var(--md-on-surface);
    line-height: 1.5;
    word-break: break-word;
}

.result-context mark {
    background: #fef3c7;
    color: #92400e;
    padding: 2px 4px;
    border-radius: 3px;
    font-weight: 600;
}

.search-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.instructions {
    background: var(--md-secondary-container);
    border: 1px solid var(--md-outline);
    border-radius: 12px;
    padding: 16px 24px;
    margin-bottom: 24px;
    text-align: center;
}

.instructions p {
    color: var(--md-on-secondary-container);
    font-size: 14px;
    margin: 0;
    font-weight: 400;
}

/* Canvas Container */
.canvas-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.page-wrapper {
    position: relative;
    box-shadow: var(--md-elevation-2);
    background: white;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--md-outline-variant);
}

.page-canvas {
    display: block;
}

.overlay-canvas {
    position: absolute;
    top: 0;
    left: 0;
    cursor: crosshair;
}

/* Intro Section */
.intro-section {
    text-align: center;
    margin-bottom: 2rem;
    padding: 0 1rem;
}

.intro-section p {
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--md-on-surface-variant);
    max-width: 800px;
    margin: 0 auto;
}

/* Benefits Section */
.benefits-section {
    margin-bottom: 3rem;
    text-align: center;
}

.benefits-section h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--md-on-surface);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.benefit-card {
    padding: 2rem;
    background: var(--md-surface);
    border-radius: 12px;
    border: 1px solid var(--md-outline-variant);
    transition: transform 0.2s, box-shadow 0.2s;
}

.benefit-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
}

.benefit-card svg {
    color: var(--md-primary);
    margin-bottom: 1rem;
}

.benefit-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--md-on-surface);
}

.benefit-card p {
    color: var(--md-on-surface-variant);
    line-height: 1.6;
}

/* Footer */
.footer {
    background: var(--md-surface);
    border-top: 1px solid var(--md-outline-variant);
    padding: 3rem 0 1rem;
    margin-top: auto;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
    text-align: left;
}

.footer-section h3 {
    color: var(--md-on-surface);
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.footer-section h4 {
    color: var(--md-on-surface);
    margin-bottom: 0.75rem;
    font-size: 1rem;
}

.footer-section p {
    line-height: 1.6;
    color: var(--md-on-surface-variant);
}

.footer-section ul {
    list-style: none;
    padding: 0;
}

.footer-section ul li {
    margin-bottom: 1rem;
    color: var(--md-on-surface-variant);
    line-height: 1.6;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--md-outline-variant);
}

.footer p, .footer-bottom {
    text-align: center;
    color: var(--md-on-surface-variant);
    font-size: 13px;
    font-weight: 400;
}

.hidden {
    display: none;
}

/* Upgrade Modal */
.upgrade-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    animation: fadeIn 0.3s;
}

.upgrade-modal-content {
    background: var(--md-surface);
    border-radius: 24px;
    padding: 40px;
    max-width: 500px;
    text-align: center;
    box-shadow: var(--md-elevation-3);
    animation: slideUp 0.3s;
}

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

.upgrade-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.upgrade-modal-content h2 {
    font-size: 28px;
    font-weight: 500;
    color: var(--md-on-surface);
    margin-bottom: 16px;
}

.upgrade-modal-content p {
    color: var(--md-on-surface-variant);
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: 12px;
}

.upgrade-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin: 24px 0;
}

.upgrade-features {
    background: var(--md-primary-container);
    border-radius: 16px;
    padding: 24px;
    margin-top: 24px;
    text-align: left;
}

.upgrade-features h3 {
    font-size: 18px;
    font-weight: 500;
    color: var(--md-on-primary-container);
    margin-bottom: 12px;
}

.upgrade-features ul {
    list-style: none;
    padding: 0;
    margin-bottom: 16px;
}

.upgrade-features li {
    color: var(--md-on-primary-container);
    font-size: 15px;
    margin-bottom: 8px;
    padding-left: 0;
}

.upgrade-price {
    font-size: 24px;
    font-weight: 700;
    color: var(--md-primary);
    text-align: center;
    margin: 16px 0 0 0;
}

/* Context Menu */
.context-menu {
    position: absolute;
    background: var(--md-surface);
    border: 1px solid var(--md-outline-variant);
    border-radius: 8px;
    box-shadow: var(--md-elevation-3);
    z-index: 1000;
    min-width: 140px;
    padding: 4px 0;
}

.context-menu-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    cursor: pointer;
    color: var(--md-on-surface);
    font-size: 14px;
    font-weight: 400;
    transition: background 0.2s;
    min-height: 44px;
}

.context-menu-item:hover {
    background: var(--md-surface-variant);
}

.context-menu-item:active {
    background: var(--md-outline-variant);
}

.context-menu-item svg {
    color: var(--md-on-surface-variant);
    flex-shrink: 0;
}

/* Touch-friendly context menu on mobile */
@media (hover: none) and (pointer: coarse) {
    .context-menu {
        min-width: 160px;
        padding: 8px 0;
    }
    
    .context-menu-item {
        padding: 14px 20px;
        font-size: 16px;
        min-height: 48px;
    }
}

/* Responsive */
@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-section:first-child {
        grid-column: 1 / -1;
    }
}

@media (max-width: 768px) {
    .header h1 {
        font-size: 1.5rem;
    }
    
    .tagline {
        font-size: 0.9rem;
    }
    
    .intro-section p {
        font-size: 1rem;
    }
    
    .toolbar {
        flex-direction: column;
        gap: 16px;
    }
    
    .toolbar-section {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .btn {
        min-width: 120px;
        padding: 10px 16px;
        font-size: 14px;
    }
    
    .upload-area {
        padding: 48px 24px;
    }
    
    .upload-area h2 {
        font-size: 1.5rem;
    }
    
    .steps-container {
        grid-template-columns: 1fr;
    }
    
    .step-card {
        padding: 16px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-section:first-child {
        grid-column: 1;
    }
}

/* Touch Support */
@media (hover: none) and (pointer: coarse) {
    /* Increase touch targets */
    .btn {
        min-height: 44px;
        min-width: 44px;
        padding: 12px 20px;
    }
    
    .icon-btn {
        min-width: 44px;
        min-height: 44px;
        padding: 12px;
    }
    
    .preset-btn {
        min-height: 44px;
        padding: 10px 16px;
    }
    
    .upload-btn {
        min-height: 48px;
        padding: 14px 28px;
    }
    
    /* Remove hover effects on touch devices */
    .btn:hover,
    .step-card:hover,
    .benefit-card:hover {
        transform: none;
    }
    
    /* Add active states for touch feedback */
    .btn:active {
        transform: scale(0.98);
        opacity: 0.9;
    }
    
    .step-card:active,
    .benefit-card:active {
        transform: scale(0.99);
    }
    
    /* Improve canvas touch interaction */
    .canvas-container canvas {
        touch-action: none;
        -webkit-user-select: none;
        user-select: none;
        -webkit-tap-highlight-color: transparent;
    }
    
    /* Instructions text for mobile */
    .instructions {
        font-size: 13px;
        padding: 8px 12px;
    }
    
    .mobile-instructions {
        display: block;
    }
    
    .desktop-instructions {
        display: none;
    }
}

/* Desktop instructions visibility */
.mobile-instructions {
    display: none;
}

.desktop-instructions {
    display: block;
}