/****************************************/
/* Basic Reset & Global Styles          */
/****************************************/
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #1a1a1a; /* Dark background */
    color: #f0f0f0; /* Light text */
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex-grow: 1;
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    box-sizing: border-box;
}

/****************************************/
/* Header & Footer                      */
/****************************************/
header {
    background-color: #0d0d0d; /* Slightly darker black for header */
    color: #ff6600; /* Orange text */
    padding: 15px 20px;
    text-align: center;
    border-bottom: 2px solid #ff6600;
}

header h1 {
    margin: 0;
    font-size: 2em;
    font-weight: 600;
}

footer {
    background-color: #0d0d0d;
    color: #cccccc;
    text-align: center;
    padding: 10px 20px;
    border-top: 1px solid #333;
    font-size: 0.9em;
}

/****************************************/
/* Controls Section                     */
/****************************************/
.controls {
    background-color: #2c2c2c; /* Darker grey for control section */
    padding: 25px;
    border-radius: 8px;
    margin-bottom: 30px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.control-group {
    margin-bottom: 20px;
}

.control-group label {
    display: block;
    margin-bottom: 8px;
    color: #ff6600; /* Orange labels */
    font-weight: 500;
}

select,
input[type="file"] {
    width: 100%;
    padding: 10px;
    border-radius: 5px;
    border: 1px solid #444;
    background-color: #3a3a3a;
    color: #f0f0f0;
    box-sizing: border-box;
    margin-bottom: 10px; /* For file inputs */
}

select:focus,
input[type="file"]:focus,
textarea:focus {
    outline: none;
    border-color: #ff6600;
    box-shadow: 0 0 5px rgba(255, 102, 0, 0.5);
}

.upload-areas {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

.upload-block {
    flex: 1;
    background-color: #333333;
    padding: 15px;
    border-radius: 6px;
    border: 1px solid #444;
}

.upload-block h2 {
    color: #ff6600;
    font-size: 1.2em;
    margin-top: 0;
    margin-bottom: 10px;
    border-bottom: 1px solid #555;
    padding-bottom: 5px;
}

textarea {
    width: 100%;
    min-height: 200px;
    padding: 10px;
    border-radius: 5px;
    border: 1px solid #444;
    background-color: #252525;
    color: #f0f0f0;
    box-sizing: border-box;
    font-family: 'Courier New', Courier, monospace; /* Monospaced for config files */
    font-size: 0.9em;
    resize: vertical;
}

button {
    background-color: #ff6600; /* Orange background */
    color: #000000; /* Black text */
    padding: 12px 25px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
    font-weight: bold;
    transition: background-color 0.3s ease, transform 0.1s ease;
    display: block; /* Make buttons block to center them or control width easily */
    margin: 20px auto 0 auto; /* Center buttons */
}

button:hover {
    background-color: #e65c00; /* Darker orange on hover */
}

button:active {
    transform: scale(0.98);
}

/****************************************/
/* Results Section                      */
/****************************************/
.results {
    background-color: #2c2c2c;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.results h2 {
    color: #ff6600;
    margin-top: 0;
    border-bottom: 1px solid #555;
    padding-bottom: 10px;
}

.comparison-output-container {
    background-color: #1e1e1e; /* Very dark for code display */
    border: 1px solid #444;
    border-radius: 5px;
    padding: 15px;
    max-height: 500px;
    overflow-y: auto;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9em;
    line-height: 1.5;
}

#diffOutput {
    white-space: pre-wrap; /* Preserve whitespace and wrap lines */
    word-wrap: break-word; /* Break long words */
    margin: 0;
}

/* Difference Highlighting */
.diff-highlight {
    background-color: rgba(57, 255, 20, 0.2); /* Neon green with some transparency */
    color: #39FF14; /* Neon green text */
    font-weight: bold;
    padding: 1px 0;
}

.line-added {
    background-color: rgba(0, 255, 0, 0.1);
    color: #a1e8a1;
}

.line-removed {
    background-color: rgba(255, 0, 0, 0.1);
    color: #f7abab;
    text-decoration: line-through;
}

/****************************************/
/* Responsive Adjustments               */
/****************************************/
@media (max-width: 768px) {
    .upload-areas {
        flex-direction: column;
    }

    header h1 {
        font-size: 1.5em;
    }

    button {
        width: 100%;
        padding: 15px;
    }
}