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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8fafc;
}

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

/* Header Styles */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo i {
    font-size: 1.8rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s ease;
}

.nav-links a:hover {
    opacity: 0.8;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero-content p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* Main Converter Section */
.converter-section {
    padding: 4rem 0;
}

.converter-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.upload-section, .settings-section {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.upload-header, .settings-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.upload-header h2, .settings-header h2 {
    color: #2d3748;
    font-size: 1.5rem;
    font-weight: 600;
}

/* File Upload Area */
.file-upload-area {
    border: 2px dashed #cbd5e0;
    border-radius: 8px;
    padding: 3rem 2rem;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    background: #f7fafc;
}

.file-upload-area:hover {
    border-color: #667eea;
    background: #edf2f7;
}

.file-upload-area.dragover {
    border-color: #667eea;
    background: #e6fffa;
}

.file-upload-content i {
    font-size: 3rem;
    color: #a0aec0;
    margin-bottom: 1rem;
}

.file-upload-content h3 {
    color: #2d3748;
    margin-bottom: 0.5rem;
}

.file-upload-content p {
    color: #718096;
}

/* File List */
.file-list {
    margin-top: 1.5rem;
}

.file-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: #f7fafc;
    border-radius: 8px;
    margin-bottom: 0.5rem;
}

.file-preview {
    width: 50px;
    height: 50px;
    object-fit: cover;
    border-radius: 4px;
}

.file-info {
    flex: 1;
}

.file-name {
    font-weight: 500;
    color: #2d3748;
}

.file-size {
    color: #718096;
    font-size: 0.9rem;
}

.file-format {
    color: #667eea;
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
}

.file-actions {
    display: flex;
    gap: 0.5rem;
}

.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: #667eea;
    color: white;
}

.btn-primary:hover {
    background: #5a67d8;
}

.btn-secondary {
    background: #e2e8f0;
    color: #4a5568;
}

.btn-secondary:hover {
    background: #cbd5e0;
}

.btn-danger {
    background: #f56565;
    color: white;
}

.btn-danger:hover {
    background: #e53e3e;
}

/* Settings Grid */
.settings-grid {
    display: grid;
    gap: 1.5rem;
}

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

.setting-group label {
    font-weight: 500;
    color: #2d3748;
}

.setting-group select,
.setting-group input[type="number"],
.setting-group input[type="text"] {
    padding: 0.75rem;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.setting-group select:focus,
.setting-group input[type="number"]:focus,
.setting-group input[type="text"]:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* Range Container */
.range-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.range-container input[type="range"] {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: #e2e8f0;
    outline: none;
    -webkit-appearance: none;
}

.range-container input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #667eea;
    cursor: pointer;
}

.range-container input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #667eea;
    cursor: pointer;
    border: none;
}

.range-container span {
    font-weight: 500;
    color: #4a5568;
    min-width: 50px;
    text-align: center;
}

/* Dimensions Container */
.dimensions-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dimensions-container input {
    flex: 1;
}

.dimensions-container span {
    font-weight: 500;
    color: #4a5568;
}

/* Color Container */
.color-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.color-container input[type="color"] {
    width: 50px;
    height: 40px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

.color-container input[type="text"] {
    flex: 1;
}

/* SVG Options Container */
.svg-options-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* Checkbox Styles */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.9rem;
    color: #4a5568;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: #667eea;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.convert-btn, .download-all-btn {
    flex: 1;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
}

.convert-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.convert-btn:hover {
    transform: translateY(-2px);
}

.download-all-btn {
    background: #48bb78;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.3s ease;
}

.download-all-btn:hover {
    background: #38a169;
}

/* Results Section */
.results-section {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    margin-top: 2rem;
}

.results-section h3 {
    color: #2d3748;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.result-item {
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    overflow: hidden;
    background: white;
}

.result-preview {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.result-info {
    padding: 1rem;
}

.result-info h4 {
    color: #2d3748;
    margin-bottom: 0.5rem;
}

.result-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    color: #718096;
}

.result-actions {
    display: flex;
    gap: 0.5rem;
}

/* Presets Section */
.presets-section {
    padding: 4rem 0;
    background: white;
}

.presets-section h2 {
    text-align: center;
    color: #2d3748;
    margin-bottom: 3rem;
    font-size: 2rem;
}

.presets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.preset-item {
    background: #f7fafc;
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.preset-item:hover {
    background: #edf2f7;
    border-color: #667eea;
    transform: translateY(-2px);
}

.preset-item h4 {
    color: #2d3748;
    margin-bottom: 0.5rem;
}

.preset-item p {
    color: #667eea;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.preset-desc {
    color: #718096;
    font-size: 0.9rem;
}

/* SVG Special Section */
.svg-special-section {
    padding: 4rem 0;
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
}

.svg-special-section h2 {
    text-align: center;
    color: #2d3748;
    margin-bottom: 3rem;
    font-size: 2rem;
}

.svg-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.svg-feature {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.svg-feature:hover {
    transform: translateY(-5px);
}

.svg-feature i {
    font-size: 3rem;
    color: #667eea;
    margin-bottom: 1rem;
}

.svg-feature h3 {
    color: #2d3748;
    margin-bottom: 1rem;
}

.svg-feature p {
    color: #718096;
}

/* Features Section */
.features {
    padding: 4rem 0;
    background: #f7fafc;
}

.features h2 {
    text-align: center;
    color: #2d3748;
    margin-bottom: 3rem;
    font-size: 2rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

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

.feature-card i {
    font-size: 3rem;
    color: #667eea;
    margin-bottom: 1rem;
}

.feature-card h3 {
    color: #2d3748;
    margin-bottom: 1rem;
}

.feature-card p {
    color: #718096;
}

/* How It Works Section */
.how-it-works {
    padding: 4rem 0;
    background: white;
}

.how-it-works h2 {
    text-align: center;
    color: #2d3748;
    margin-bottom: 3rem;
    font-size: 2rem;
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.step {
    text-align: center;
    padding: 2rem;
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1rem;
}

.step h3 {
    color: #2d3748;
    margin-bottom: 1rem;
}

.step p {
    color: #718096;
}

/* FAQ Section */
.faq {
    padding: 4rem 0;
    background: #f7fafc;
}

.faq h2 {
    text-align: center;
    color: #2d3748;
    margin-bottom: 3rem;
    font-size: 2rem;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: 8px;
    margin-bottom: 1rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.faq-question {
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s ease;
}

.faq-question:hover {
    background: #f7fafc;
}

.faq-question h3 {
    color: #2d3748;
    font-size: 1.1rem;
}

.faq-question i {
    color: #667eea;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 1.5rem 1.5rem;
    color: #718096;
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

/* Footer */
.footer {
    background: #2d3748;
    color: white;
    padding: 3rem 0 1rem;
}

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

.footer-section .logo {
    margin-bottom: 1rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
    color: #e2e8f0;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #a0aec0;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #4a5568;
    color: #a0aec0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-links {
        gap: 1rem;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .converter-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .dimensions-container {
        flex-direction: column;
        align-items: stretch;
    }
    
    .dimensions-container span {
        text-align: center;
    }
    
    .color-container {
        flex-direction: column;
        align-items: stretch;
    }
    
    .results-grid {
        grid-template-columns: 1fr;
    }
    
    .presets-grid {
        grid-template-columns: 1fr;
    }
    
    .svg-features {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .steps {
        grid-template-columns: 1fr;
    }
}

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

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.hidden { display: none; }
.visible { display: block; }