@font-face {
    font-family: 'Julia Mono';
    src: url('fonts/JuliaMono-Regular.woff2') format('woff2'),
         url('fonts/JuliaMono-Regular.ttf') format('truetype'); /* Fallback */
}

:root {
    color-scheme: light dark;

    /* Default (light theme) values */
    --bg: #ffffff;
    --fg: #000000;
    --header-bg: #ffffff;       /* White header in light mode */
    --header-fg: #000000;       /* Black header text */
    --border: #ccc;
    --panel-header-bg: #f0f0f0;
    --panel-header-hover-bg: #e0e0e0;
    --panel-header-fg: #000000;
    --textarea-bg: #ffffff;
    --textarea-fg: #000000;
}

html {
    font-size: 150%;
}

body {
    font-family: sans-serif;
    margin: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--bg);
    color: var(--fg);
}

header {
    padding: 0.5em 1em;
    background: var(--header-bg);
}

header a {
    color: var(--header-fg);
    text-decoration: none;
    font-size: 1.4em;
    font-weight: bold;
}

main {
    flex: 1;
    display: flex;
    overflow: hidden;
}

.panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border);
}

.panel-header {
    text-align: center;
    padding: 0.7em;
    border-bottom: 1px solid var(--border);
    user-select: none;
    cursor: pointer;
    transition: background 0.2s;
    font-weight: bold;
    background: var(--panel-header-bg);
    color: var(--panel-header-fg);
}

.panel-header:hover {
    background: var(--panel-header-hover-bg);
}

textarea {
    flex: 1;
    width: 100%;
    border: none;
    resize: none;
    font-family: 'Julia Mono', monospace;
    font-size: 20px;
    padding: 1em;
    box-sizing: border-box;
    outline: none;
    background: var(--textarea-bg);
    color: var(--textarea-fg);
}

/* Dark theme override */
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #121212;
        --fg: #eeeeee;
        --header-bg: #1f1f1f;
        --header-fg: #ffffff;
        --border: #444;
        --panel-header-bg: #2a2a2a;
        --panel-header-hover-bg: #3a3a3a;
        --panel-header-fg: #ffffff;
        --textarea-bg: #1e1e1e;
        --textarea-fg: #ffffff;
    }
}