/* CSS Variables for easy theme management */
:root {
    /* Color Variables (Monokai Extended Bright Inspired) */
    --bg-color: #272822;           /* Main background color */
    --text-color: #F8F8F2;         /* Main text color */
    --secondary-bg: #3E3D32;       /* Secondary background for elements */
    --border-color: rgba(248, 248, 242, 0.5); /* Semi-transparent text color for borders */
    --scrollbar-thumb: rgba(248, 248, 242, 0.5); /* Scrollbar thumb color */
    --scrollbar-track: #3E3D32;    /* Scrollbar track color */
    --hover-opacity: 0.8;
    --row-even-bg: #3E3D32;

    /* Size Variables */
    --padding: 10px;
    --padding-large: 20px;
    --font-size: 16px;
    --button-padding: 5px 10px;
    --scrollbar-width: 10px;
}

/* Ensure full viewport height without main scrollbar */
html, body {
    height: 100vh;
    margin: 0;
    overflow: hidden;
}

/* Overall page styling */
body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Courier New', Courier, monospace;
    font-size: var(--font-size);
    display: flex;
    flex-direction: column;
}

/*  URL styling  */
a:link,
a:visited {color: hsl(190, 81%, 67%); text-decoration: none; outline: none;}
a:hover {color: hsl(80, 76%, 53%);}
a:active {color: hsl(40, 93%, 51%);}

/* Header and Controls */
.header, .controls {
    padding: var(--padding) var(--padding-large);
    text-align: left;
    flex-shrink: 0;
}
.header h1 {
    margin: 0 0 var(--padding);
    opacity: 0.69;
}
.header p {
    margin: 0;
    font-size: 1rem;
    opacity: 0.88;
}
.controls button {
    background-color: var(--text-color);
    color: var(--bg-color);
    border: none;
    padding: var(--button-padding);
    font-size: var(--font-size);
    cursor: pointer;
}
.controls button:hover {
    opacity: var(--hover-opacity);
}

/* Container for main content fills remaining space */
.container {
    flex: 1;
    display: flex;
    gap: var(--padding);
    padding: 0 var(--padding-large) var(--padding-large);
    box-sizing: border-box;
    min-height: 0;
}

/* Left (input) and right (results) sections */
.input-section, .results-section {
    display: flex;
    flex-direction: column;
    min-height: 0;
}
.results-section {
    flex: 1;
}

/* Textarea and results area fill their parent and scroll internally */
textarea {
    outline: none;
}
.input-section textarea,
.results-section #results {
    flex: 1;
    overflow: auto;
    border: 1px solid var(--border-color);
    background-color: var(--secondary-bg);
    color: var(--text-color);
    font-size: var(--font-size);
    box-sizing: border-box;
}
.input-section textarea {
    padding: var(--padding);
    resize: none;
}

/* Custom Scrollbar Styling */

/* Firefox */
.input-section textarea,
.results-section #results {
    scrollbar-width: thin;
    scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

/* WebKit browsers */
.input-section textarea::-webkit-scrollbar,
.results-section #results::-webkit-scrollbar {
    width: var(--scrollbar-width);
}
.input-section textarea::-webkit-scrollbar-track,
.results-section #results::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
}
.input-section textarea::-webkit-scrollbar-thumb,
.results-section #results::-webkit-scrollbar-thumb {
    background-color: var(--scrollbar-thumb);
    border-radius: 5px;
    border: 2px solid var(--scrollbar-track);
}

/* Table styling */
table {
    width: 100%;
    border-collapse: collapse;
}
th, td {
    border: 1px solid var(--border-color);
    padding: var(--padding);
    text-align: center;
    cursor: pointer;
}
th:nth-child(1),
td:nth-child(1) {
    border-left: none;
}
tr:last-of-type td {
    border-bottom: none;
}
th {
    background-color: var(--secondary-bg);
    /* Sticky header settings */
    position: sticky;
    top: 0;
    z-index: 2;
    border-top: none;
}
tr:nth-child(even) {
    background-color: var(--row-even-bg);
}

/* Responsive design: Stack columns on smaller screens */
@media (max-width: 840px) {
    .container {
        flex-direction: column;
    }
    textarea {
        min-height: 180px;
    }
}