style.css

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    overflow: hidden;
    animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Header */
.header {
    background: linear-gradient(135deg, #ff6b6b 0%, #feca57 100%);
    color: white;
    padding: 40px 30px;
    text-align: center;
}

.title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    font-weight: 300;
}

/* Main content */
.main-content {
    padding: 40px 30px;
}

.upload-section {
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 25px;
}

.form-label {
    display: block;
    font-size: 1.1rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 10px;
}

.form-textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid #e1e8ed;
    border-radius: 12px;
    font-size: 1rem;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    resize: vertical;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

.form-textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    background: white;
}

.form-hint {
    font-size: 0.9rem;
    color: #6c757d;
    margin-top: 8px;
    font-style: italic;
}

.form-actions {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.btn-primary:disabled {
    background: #95a5a6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-secondary {
    background: #f8f9fa;
    color: #495057;
    border: 2px solid #dee2e6;
}

.btn-secondary:hover {
    background: #e9ecef;
    border-color: #adb5bd;
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: #6c757d;
    border: 1px solid #dee2e6;
    padding: 8px 16px;
    font-size: 0.9rem;
}

.btn-ghost:hover {
    background: #f8f9fa;
    color: #495057;
}

/* Results section */
.results-section {
    margin-top: 30px;
    border: 2px solid #e1e8ed;
    border-radius: 12px;
    overflow: hidden;
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.results-header {
    background: #f8f9fa;
    padding: 15px 20px;
    border-bottom: 1px solid #e1e8ed;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.results-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: #2c3e50;
    margin: 0;
}

.results-content {
    padding: 20px;
    background: white;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.9rem;
    line-height: 1.8;
    white-space: pre-wrap;
    max-height: 400px;
    overflow-y: auto;
}

/* Loading section */
.loading-section {
    text-align: center;
    padding: 40px 20px;
    animation: fadeIn 0.3s ease-out;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

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

.loading-text {
    font-size: 1.1rem;
    color: #6c757d;
    font-weight: 500;
}

/* Footer */
.footer {
    background: #f8f9fa;
    padding: 25px 30px;
    border-top: 1px solid #e1e8ed;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.status-indicators {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.status-badge {
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    background: #e9ecef;
    color: #495057;
}

.status-badge.success {
    background: #d4edda;
    color: #155724;
}

.status-badge.error {
    background: #f8d7da;
    color: #721c24;
}

.status-badge.warning {
    background: #fff3cd;
    color: #856404;
}

.footer-links {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.footer-link {
    color: #6c757d;
    text-decoration: none;
    font-size: 0.9rem;
    padding: 5px 10px;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.footer-link:hover {
    background: #e9ecef;
    color: #495057;
}

/* Result styling */
.result-line {
    margin: 5px 0;
    padding: 8px 12px;
    border-radius: 6px;
    border-left: 4px solid transparent;
}

.result-success {
    background: #d4edda;
    border-left-color: #28a745;
    color: #155724;
}

.result-error {
    background: #f8d7da;
    border-left-color: #dc3545;
    color: #721c24;
}

.result-warning {
    background: #fff3cd;
    border-left-color: #ffc107;
    color: #856404;
}

.result-info {
    background: #d1ecf1;
    border-left-color: #17a2b8;
    color: #0c5460;
}

/* Responsive design */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .container {
        border-radius: 15px;
    }
    
    .header {
        padding: 30px 20px;
    }
    
    .title {
        font-size: 2rem;
    }
    
    .main-content {
        padding: 30px 20px;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .btn {
        justify-content: center;
        width: 100%;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .status-indicators {
        justify-content: center;
    }
}

/* Keyboard shortcuts hint */
.keyboard-hint {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 10px 15px;
    border-radius: 8px;
    font-size: 0.8rem;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    z-index: 1000;
}

.keyboard-hint.show {
    opacity: 1;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}