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

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 3rem;
    color: white;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.logo i {
    font-size: 2.5rem;
    color: #10b981;
}

.logo h1 {
    font-size: 2.5rem;
    font-weight: 700;
}

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

/* Main Content */
.main-content {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Input Section */
.input-section {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
    align-items: start;
}

.text-input-container {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.text-input-container h2 {
    color: #2d3748;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    font-weight: 600;
}

.input-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.control-btn {
    background: #f3f4f6;
    border: 2px solid #e5e7eb;
    color: #4b5563;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.control-btn:hover {
    background: #e5e7eb;
    transform: translateY(-1px);
}

#inputText {
    width: 100%;
    padding: 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 1rem;
    font-family: inherit;
    resize: vertical;
    min-height: 300px;
    transition: all 0.3s ease;
    background: #f8fafc;
}

#inputText:focus {
    outline: none;
    border-color: #10b981;
    background: white;
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.text-stats {
    display: flex;
    justify-content: space-between;
    margin-top: 1rem;
    font-size: 0.9rem;
    color: #6b7280;
}

/* Check Options */
.check-options {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.check-options h3 {
    color: #2d3748;
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
    font-weight: 600;
}

.options-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.option-item {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: 0.75rem;
    border-radius: 10px;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.option-item:hover {
    background: #f8fafc;
    border-color: #e5e7eb;
}

.option-item input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid #d1d5db;
    border-radius: 4px;
    margin-right: 1rem;
    position: relative;
    transition: all 0.3s ease;
}

.option-item input[type="checkbox"]:checked + .checkmark {
    background: #10b981;
    border-color: #10b981;
}

.option-item input[type="checkbox"]:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 0.8rem;
    font-weight: bold;
}

.option-content {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
}

.option-content i {
    color: #10b981;
    width: 20px;
}

.check-btn {
    width: 100%;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.check-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(16, 185, 129, 0.3);
}

/* Results Section */
.results-section {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #f3f4f6;
}

.results-header h2 {
    color: #2d3748;
    font-size: 1.8rem;
    font-weight: 600;
}

.results-summary {
    display: flex;
    gap: 2rem;
}

.summary-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.summary-item i {
    font-size: 1.5rem;
    color: #10b981;
}

.summary-item span:first-of-type {
    font-size: 1.5rem;
    font-weight: 700;
    color: #2d3748;
}

.summary-item span:last-of-type {
    font-size: 0.9rem;
    color: #6b7280;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    border-bottom: 2px solid #f3f4f6;
}

.tab-btn {
    background: none;
    border: none;
    padding: 1rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    color: #6b7280;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-bottom: 3px solid transparent;
}

.tab-btn:hover {
    color: #10b981;
}

.tab-btn.active {
    color: #10b981;
    border-bottom-color: #10b981;
}

.tab-content {
    min-height: 400px;
}

.tab-pane {
    display: none;
}

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

/* Error List */
.error-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.error-item {
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: 12px;
    padding: 1.5rem;
    border-left: 4px solid #ef4444;
}

.error-header {
    display: flex;
    justify-content: between;
    align-items: center;
    margin-bottom: 1rem;
}

.error-word {
    font-weight: 600;
    color: #dc2626;
    font-size: 1.1rem;
}

.error-type {
    background: #dc2626;
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.error-context {
    background: white;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    border: 1px solid #e5e7eb;
}

.suggestions-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.suggestion-btn {
    background: #f3f4f6;
    border: 1px solid #d1d5db;
    color: #374151;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.suggestion-btn:hover {
    background: #10b981;
    color: white;
    border-color: #10b981;
}

/* Corrected Text */
.corrected-text-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.text-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

.action-btn {
    background: #f3f4f6;
    border: 2px solid #e5e7eb;
    color: #4b5563;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.action-btn:hover {
    background: #10b981;
    color: white;
    border-color: #10b981;
    transform: translateY(-1px);
}

.corrected-text {
    background: #f8fafc;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    padding: 1.5rem;
    min-height: 300px;
    font-size: 1rem;
    line-height: 1.6;
    white-space: pre-wrap;
}

/* Footer */
.footer {
    text-align: center;
    margin-top: 3rem;
    color: white;
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .input-section {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .results-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .results-summary {
        gap: 1rem;
    }
    
    .tabs {
        flex-direction: column;
    }
    
    .tab-btn {
        justify-content: flex-start;
    }
    
    .logo h1 {
        font-size: 2rem;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.results-section {
    animation: fadeInUp 0.6s ease;
}

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

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid #f3f4f6;
    border-top: 2px solid #10b981;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}