style.css

/* Basic Reset and Layout */
body {
    font-family: 'Consolas', 'Monaco', monospace; 
    margin: 0;
    padding: 0;
    background-color: #1e1e1e; 
    color: #cccccc;
}

header {
    background-color: #252526;
    padding: 10px 20px;
    border-bottom: 1px solid #000000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.5);
}

h1 {
    font-size: 1.5em;
    margin: 0;
    color: #007acc; 
}

.stats-bar, .controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

.stat-item strong {
    color: #ffffff;
    font-weight: bold;
}

/* Button Styling (Navigation) */
#prevBtn, #nextBtn {
    background-color: #007acc;
    color: white;
    border: none;
    padding: 8px 15px;
    cursor: pointer;
    font-size: 0.9em;
    border-radius: 3px;
    transition: background-color 0.2s;
}

#prevBtn:hover, #nextBtn:hover {
    background-color: #005f99;
}

/* Clear Button Styling */
.clear-btn {
    position: absolute;
    top: 5px; 
    right: 5px;
    background: #444;
    color: #fff;
    border: none;
    padding: 2px 8px;
    font-size: 0.8em;
    cursor: pointer;
    z-index: 10;
    border-radius: 3px;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.clear-btn:hover {
    opacity: 1.0;
    background: #555;
}

.editor-container {
    height: calc(100vh - 58px); 
    display: flex;
}

.editor-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    border-right: 1px solid #000000;
    position: relative; 
    overflow: hidden;
}

h2 {
    background-color: #3c3c3c;
    color: #ffffff;
    padding: 5px 10px;
    font-size: 1em;
    margin: 0;
    flex-shrink: 0; 
}

/* INPUT WRAPPER STYLES (Increased Height to 200px) */
.input-wrapper {
    display: flex;
    width: 100%;
    height: 200px; /* INCREASED SIZE */
    flex-shrink: 0;
    border-bottom: 1px solid #000000;
    overflow: hidden;
}

/* STABLE INPUT TEXTAREA */
.paste-input {
    flex-grow: 1;
    height: 100%;
    padding: 5px;
    box-sizing: border-box;
    border: none; 
    resize: none;
    font-family: inherit;
    font-size: 14px;
    line-height: 18px;
    background-color: #252526;
    color: #cccccc;
    outline: none;
    overflow-y: scroll;
}


/* Line Numbers (Default for display panels) */
.line-numbers {
    width: 40px;
    flex-shrink: 0; 
    padding: 5px 5px 5px 0;
    text-align: right;
    color: #858585;
    background-color: #252526;
    font-size: 14px;
    line-height: 18px; 
    white-space: pre;
    user-select: none;
    overflow-y: hidden; 
}

/* Specific styling for Line Numbers in the Input Section */
.input-numbers {
    background-color: #252526; 
}


/* Code Editor Div (Display Panel) */
.code-wrapper {
    display: flex;
    flex-grow: 1;
    position: relative;
    overflow: hidden;
}

.code-editor {
    flex-grow: 1;
    overflow-y: scroll; 
    padding: 5px;
    box-sizing: border-box;
    font-size: 14px;
    line-height: 18px; 
    white-space: pre; 
    font-family: inherit;
    background-color: #1e1e1e;
    outline: none; 
    cursor: default; 
}

/* Diff Highlighting */
.code-editor span {
    display: block; 
    width: 100%;
    min-height: 18px; 
}

.added {
    background-color: #285435 !important; /* Green */
}

.removed {
    background-color: #6a0000 !important; /* Red */
}

/* NEW: Active Change Highlight (Purple) */
.active-diff {
    background-color: #58356E !important; 
    outline: 1px solid #BB86FC; /* Border for visibility */
}

.placeholder {
    background-color: transparent !important;
    color: transparent !important; 
}