.diff-page {
    max-width: var(--medium-width);
    margin: 0 auto;
    padding: 20px;
}

.input-section {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
}

.input-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.panel-title {
    margin: 0 0 8px 0;
    font-size: 15px;
    font-weight: 600;
    color: #374151;
}

.diff-textarea {
    flex: 1;
    min-height: 200px;
    padding: 12px;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
    font-size: 14px;
    line-height: 1.6;
    resize: vertical;
    background: #f9fafb;
    transition: border-color 0.2s;
}

.diff-textarea:focus {
    outline: none;
    border-color: #ef4444;
}

.diff-textarea::placeholder {
    color: #9ca3af;
}

.button-section {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-bottom: 24px;
}

.btn {
    padding: 10px 24px;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background: #ef4444;
    color: white;
}

.btn-primary:hover {
    background: #dc2626;
}

.btn-secondary {
    background: #f3f4f6;
    color: #374151;
    border: 1px solid #d1d5db;
}

.btn-secondary:hover {
    background: #e5e7eb;
}

.result-section {
    background: white;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.03);
    overflow: hidden;
}

.result-header {
    padding: 16px 20px;
    border-bottom: 1px solid #e5e7eb;
    background: #f9fafb;
}

.result-header h3 {
    margin: 0;
    font-size: 16px;
    font-weight: 600;
    color: #1f2937;
}

.diff-result {
    max-height: 500px;
    overflow-y: auto;
}

.diff-row {
    display: flex;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
    font-size: 14px;
    line-height: 1.6;
    border-bottom: 1px solid #f3f4f6;
}

.diff-row:hover {
    background: #f9fafb;
}

.line-num {
    width: 50px;
    padding: 8px 12px;
    text-align: right;
    background: #f3f4f6;
    color: #9ca3af;
    font-size: 12px;
    border-right: 1px solid #e5e7eb;
    user-select: none;
}

.line-content {
    flex: 1;
    padding: 8px 12px;
    white-space: pre-wrap;
    word-break: break-all;
}

.diff-remove {
    background: #fee2e2;
}

.diff-remove .line-content {
    color: #dc2626;
}

.diff-add {
    background: #dcfce7;
}

.diff-add .line-content {
    color: #16a34a;
}



@media (max-width: 768px) {
    .input-section {
        flex-direction: column;
    }
    
    .button-section {
        flex-wrap: wrap;
    }
    
    .line-num {
        width: 40px;
        padding: 6px 8px;
    }
}