/* DevKit Utilities - Modern CSS Styles */

/* CSS Variables for consistent theming */
:root {
    --primary-color: #3498db;
    --primary-dark: #2980b9;
    --secondary-color: #2c3e50;
    --accent-color: #e74c3c;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --background-light: #f8f9fa;
    --background-dark: #2c3e50;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-light: #ffffff;
    --border-color: #dee2e6;
    --border-radius: 8px;
    --shadow-light: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 8px rgba(0, 0, 0, 0.15);
    --shadow-heavy: 0 8px 16px rgba(0, 0, 0, 0.2);
    --transition: all 0.3s ease;
    --sidebar-width: 280px;
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-light);
    overflow-x: hidden;
}

/* App Container */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar Styles */
.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(135deg, var(--secondary-color), #34495e);
    color: var(--text-light);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 1000;
    box-shadow: var(--shadow-heavy);
}

.sidebar-header {
    padding: 2rem 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.sidebar-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.sidebar-header p {
    font-size: 0.9rem;
    opacity: 0.8;
    margin: 0;
}

.nav-menu {
    padding: 1rem 0;
}

.nav-section {
    margin-bottom: 2rem;
}

.nav-section h3 {
    padding: 0 1.5rem 0.5rem;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.7;
    font-weight: 600;
}

.nav-item {
    width: 100%;
    padding: 0.75rem 1.5rem;
    background: none;
    border: none;
    color: var(--text-light);
    text-align: left;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.95rem;
    position: relative;
}

.nav-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
    padding-left: 2rem;
}

.nav-item.active {
    background-color: var(--primary-color);
    box-shadow: inset 4px 0 0 var(--primary-dark);
}

.nav-item.active::before {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-left: 8px solid var(--primary-color);
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
}

.nav-item i {
    width: 1.2rem;
    text-align: center;
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    background-color: var(--background-light);
    min-height: 100vh;
}

/* Tool Sections */
.tool-section {
    display: none;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.tool-section.active {
    display: block;
    animation: fadeIn 0.5s ease-in-out;
}

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

.tool-header {
    margin-bottom: 2rem;
    text-align: center;
}

.tool-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.tool-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin: 0;
}

.tool-content {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow-medium);
}

/* Form Elements */
input, select, textarea, button {
    font-family: inherit;
    font-size: 1rem;
}

input[type="text"], 
input[type="number"], 
input[type="date"], 
input[type="datetime-local"], 
input[type="color"],
select, 
textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: var(--transition);
    background-color: white;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

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

/* Buttons */
button {
    cursor: pointer;
    border: none;
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.control-btn {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

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

.control-btn.primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

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

.control-btn.secondary:hover {
    background-color: #e67e22;
    transform: translateY(-2px);
}

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

.control-btn.tertiary:hover {
    background-color: #6c7b7d;
    transform: translateY(-2px);
}

.control-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.generate-btn, .convert-btn {
    padding: 1rem 2rem;
    font-size: 1.1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.generate-btn:hover, .convert-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-heavy);
}

.copy-btn {
    padding: 0.5rem 1rem;
    background-color: var(--success-color);
    color: white;
    font-size: 0.9rem;
}

.copy-btn:hover {
    background-color: #219a52;
    transform: translateY(-1px);
}

/* Grid Layouts */
.converter-grid, .date-calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: start;
}

.input-group, .timezone-input-group, .datetime-input-group, .result-group {
    display: flex;
    flex-direction: column;
}

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

/* Time Zone Converter */
.timezone-select {
    max-width: 100%;
}

.converted-time-display {
    padding: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border-radius: var(--border-radius);
    font-size: 1.2rem;
    font-weight: 600;
    text-align: center;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Date Calculator */
.tab-container {
    width: 100%;
}

.tab-buttons {
    display: flex;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
}

.tab-btn {
    padding: 1rem 2rem;
    background: none;
    border: none;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 3px solid transparent;
    transition: var(--transition);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

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

.tab-content {
    display: none;
}

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

.result-display {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.result-item {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    text-align: center;
    border: 2px solid var(--border-color);
}

.result-item.full-width {
    grid-column: 1 / -1;
}

.result-label {
    display: block;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
}

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

/* Stopwatch */
.stopwatch-container {
    text-align: center;
}

.stopwatch-display {
    font-size: 4rem;
    font-weight: 700;
    font-family: 'Courier New', monospace;
    color: var(--primary-color);
    margin-bottom: 2rem;
    padding: 2rem;
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border-radius: var(--border-radius);
    border: 3px solid var(--primary-color);
}

.stopwatch-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.lap-times {
    margin-top: 2rem;
}

.lap-times h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.lap-list {
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: white;
}

.lap-item {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.lap-item:last-child {
    border-bottom: none;
}

.lap-item:nth-child(odd) {
    background-color: #f8f9fa;
}

/* Countdown Timer */
.countdown-container {
    text-align: center;
}

.countdown-input {
    margin-bottom: 3rem;
}

.countdown-input label {
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.countdown-display {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.countdown-item {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 2rem 1rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
}

.countdown-number {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    font-family: 'Courier New', monospace;
}

.countdown-label {
    display: block;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.9;
    margin-top: 0.5rem;
}

.countdown-status {
    font-size: 1.2rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* Random Number Generator */
.random-number-container {
    text-align: center;
}

.random-result {
    margin-top: 3rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.result-number {
    font-size: 4rem;
    font-weight: 700;
    color: var(--primary-color);
    padding: 2rem;
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border-radius: var(--border-radius);
    border: 3px solid var(--primary-color);
    min-width: 200px;
    font-family: 'Courier New', monospace;
}

/* Hash Generator */
.hash-container {
    max-width: 800px;
    margin: 0 auto;
}

.input-section {
    margin-bottom: 2rem;
}

.input-tabs {
    display: flex;
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.input-tab {
    padding: 0.75rem 1.5rem;
    background: none;
    border: none;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 3px solid transparent;
    transition: var(--transition);
}

.input-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.input-content {
    display: none;
}

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

#hash-text-input {
    min-height: 120px;
    resize: vertical;
}

.file-upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius);
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background-color: #f8f9fa;
}

.file-upload-area:hover {
    border-color: var(--primary-color);
    background-color: rgba(52, 152, 219, 0.05);
}

.file-upload-area i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.file-info {
    margin-top: 1rem;
    padding: 1rem;
    background-color: #f8f9fa;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.hash-results {
    display: grid;
    gap: 1rem;
}

.hash-item {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 1rem;
    align-items: center;
    padding: 1rem;
    background-color: #f8f9fa;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.hash-item label {
    font-weight: 700;
    margin: 0;
    color: var(--text-primary);
}

.hash-output {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.hash-value {
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    word-break: break-all;
    flex: 1;
    color: var(--text-secondary);
}

.copy-hash-btn {
    padding: 0.5rem 0.75rem;
    font-size: 0.8rem;
    background-color: var(--success-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
}

.copy-hash-btn:hover {
    background-color: #219a52;
}

.privacy-notice {
    margin-top: 2rem;
    padding: 1rem;
    background-color: #e8f5e8;
    border: 1px solid var(--success-color);
    border-radius: var(--border-radius);
    color: var(--success-color);
    font-weight: 600;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

/* Color Palette Generator */
.color-palette-container {
    max-width: 800px;
    margin: 0 auto;
}

.palette-controls {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
    align-items: start;
    margin-bottom: 3rem;
}

.control-group {
    display: flex;
    flex-direction: column;
}

.control-group label {
    margin-bottom: 0.5rem;
}

#base-color {
    height: 60px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
}

.radio-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

.radio-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 4px;
    transition: var(--transition);
}

.radio-item:hover {
    background-color: rgba(52, 152, 219, 0.1);
}

.radio-item input {
    margin: 0;
    width: auto;
}

.palette-display {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
}

.color-swatch {
    aspect-ratio: 1;
    border-radius: var(--border-radius);
    cursor: pointer;
    position: relative;
    box-shadow: var(--shadow-medium);
    transition: var(--transition);
    display: flex;
    align-items: end;
    justify-content: center;
    padding: 1rem;
}

.color-swatch:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-heavy);
}

.color-code {
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-family: 'Courier New', monospace;
    font-weight: 600;
}

/* Color Converter */
.color-converter-container {
    max-width: 600px;
    margin: 0 auto;
}

.color-input-section {
    margin-bottom: 2rem;
}

.color-preview {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    padding: 1rem;
    background-color: #f8f9fa;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.preview-swatch {
    width: 60px;
    height: 60px;
    border-radius: var(--border-radius);
    border: 2px solid var(--border-color);
    background-color: #ffffff;
}

#preview-label {
    font-weight: 600;
    color: var(--text-secondary);
}

.color-formats {
    display: grid;
    gap: 1rem;
}

.format-item {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 1rem;
    align-items: center;
    padding: 1rem;
    background-color: #f8f9fa;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.format-item label {
    font-weight: 700;
    margin: 0;
}

.format-output {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.format-value {
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    flex: 1;
    color: var(--text-secondary);
}

.copy-format-btn {
    padding: 0.5rem 0.75rem;
    font-size: 0.8rem;
    background-color: var(--success-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
}

.copy-format-btn:hover {
    background-color: #219a52;
}

/* CSV/JSON Converters */
.converter-container {
    max-width: 1000px;
    margin: 0 auto;
}

.input-section, .output-section {
    margin-bottom: 2rem;
}

.input-header, .output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.file-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.file-select-btn {
    padding: 0.5rem 1rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
}

.file-select-btn:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
}

.checkbox-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: normal;
    margin: 0;
    white-space: nowrap;
}

.checkbox-container input {
    width: auto;
    margin: 0;
}

#csv-input, #json-input, #json-output, #csv-output {
    min-height: 200px;
    resize: vertical;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

.converter-actions {
    text-align: center;
    margin: 2rem 0;
}

/* QR Code Reader */
.qr-reader-container {
    max-width: 600px;
    margin: 0 auto;
}

.qr-input-methods {
    display: flex;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
}

.method-btn {
    padding: 1rem 2rem;
    background: none;
    border: none;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 3px solid transparent;
    transition: var(--transition);
    flex: 1;
}

.method-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.qr-input-section {
    display: none;
}

.qr-input-section.active {
    display: block;
}

.camera-container {
    position: relative;
    margin-bottom: 2rem;
}

#qr-video {
    width: 100%;
    max-width: 400px;
    height: 300px;
    object-fit: cover;
    border-radius: var(--border-radius);
    border: 2px solid var(--border-color);
    display: block;
    margin: 0 auto;
}

.camera-status {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 1rem;
    border-radius: var(--border-radius);
    text-align: center;
    pointer-events: none;
}

.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius);
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background-color: #f8f9fa;
}

.upload-area:hover {
    border-color: var(--primary-color);
    background-color: rgba(52, 152, 219, 0.05);
}

.upload-area i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.qr-result {
    margin-top: 2rem;
    padding: 2rem;
    background-color: #e8f5e8;
    border: 2px solid var(--success-color);
    border-radius: var(--border-radius);
}

.qr-result h3 {
    margin-bottom: 1rem;
    color: var(--success-color);
}

.result-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.qr-content {
    padding: 1rem;
    background: white;
    border-radius: var(--border-radius);
    font-family: 'Courier New', monospace;
    word-break: break-all;
    border: 1px solid var(--border-color);
}

/* Toast Notifications */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--success-color);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-heavy);
    z-index: 10000;
    transform: translateX(400px);
    transition: var(--transition);
    font-weight: 600;
    max-width: 300px;
    word-wrap: break-word;
}

.toast.show {
    transform: translateX(0);
}

.toast.error {
    background: var(--accent-color);
}

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

/* Responsive Design */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .tool-section {
        padding: 1rem;
    }
    
    .tool-content {
        padding: 1.5rem;
    }
}

@media (max-width: 768px) {
    .converter-grid, .date-calc-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .input-row {
        grid-template-columns: 1fr;
    }
    
    .input-header, .output-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .file-controls {
        width: 100%;
        justify-content: space-between;
    }
    
    .stopwatch-display {
        font-size: 2.5rem;
        padding: 1.5rem;
    }
    
    .countdown-display {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .countdown-number {
        font-size: 2rem;
    }
    
    .result-number {
        font-size: 2.5rem;
        padding: 1.5rem;
    }
    
    .tool-header h2 {
        font-size: 2rem;
    }
    
    .stopwatch-controls {
        flex-direction: column;
        align-items: center;
    }
    
    .palette-controls {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .radio-group {
        grid-template-columns: 1fr;
    }
    
    .hash-item {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
    
    .format-item {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
}

@media (max-width: 480px) {
    :root {
        --sidebar-width: 100%;
    }
    
    .tool-section {
        padding: 0.5rem;
    }
    
    .tool-content {
        padding: 1rem;
    }
    
    .tool-header h2 {
        font-size: 1.5rem;
    }
    
    .countdown-display {
        grid-template-columns: 1fr;
    }
    
    .nav-item {
        padding: 1rem 1.5rem;
        font-size: 1rem;
    }
    
    .tab-buttons {
        flex-direction: column;
    }
    
    .tab-btn {
        text-align: center;
    }
    
    .palette-display {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Print Styles */
@media print {
    .sidebar {
        display: none;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .tool-section {
        display: block !important;
        page-break-inside: avoid;
    }
    
    .tool-header {
        border-bottom: 2px solid #000;
        margin-bottom: 1rem;
    }
    
    .control-btn, .generate-btn, .convert-btn, .copy-btn {
        display: none;
    }
}