:root {
    --bg-color: #282a36;
    --primary-color: #f8f8f2;
    --secondary-bg: #44475a;
    --btn-bg: #6272a4;
    --btn-hover-bg: #4c5d94;
    --accent-green: #50fa7b;
    --text-color-light: #f8f8f2;
    --text-color-dark: #6e7a91;
    --border-color: #383a4c;
}

body {
    background-color: var(--bg-color);
    color: var(--primary-color);
    font-family: 'Fira Code', monospace;
    margin: 0 auto;
    padding: 2rem 1rem;
    max-width: 1200px;
}

h1 {
    text-align: center;
    font-size: clamp(1.8rem, 5vw, 2.8rem);
    margin-bottom: 2rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--accent-green);
}

.file-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
    margin-bottom: 2.5rem;
}

.file-btn {
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    padding: 0.6rem 1.25rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    font-size: 0.95rem;
    color: var(--primary-color);
}

.file-btn.active {
    background-color: var(--btn-bg);
    box-shadow: 0 0 10px var(--accent-green);
    transform: scale(1.05);
}

.file-btn:hover:not(.active) {
    background-color: var(--btn-hover-bg);
    box-shadow: 0 0 5px var(--accent-green);
}

.code-container {
    background-color: var(--bg-color);
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.4);
    margin-bottom: 2rem;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.editor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background-color: var(--secondary-bg);
    border-bottom: 1px solid var(--border-color);
    color: var(--primary-color);
}

h3#fileName {
    margin: 0;
    font-weight: 500;
    font-size: 1.1rem;
    color: var(--text-color-light);
    flex-grow: 1;
}

.editor-actions {
    display: flex;
    gap: 1rem;
}

.icon-btn {
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.icon-btn:hover {
    transform: scale(1.1);
}

.icon-btn.theme-switcher-icon:hover {
    transform: rotate(90deg) scale(1.1);
}

.output-container {
    background-color: #242631;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.4);
    margin-bottom: 2rem;
    min-height: 100px;
    border: 1px solid var(--border-color);
}

pre#outputBlock {
    margin: 0;
    white-space: pre-wrap;
    word-wrap: break-word;
    color: var(--accent-green);
    font-size: 1rem;
}

.action-buttons {
    text-align: center;
    margin-top: 2rem;
}

.run-btn {
    background-color: var(--accent-green);
    color: var(--bg-color);
    border: none;
    padding: 1rem 2.5rem;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    border-radius: 5px;
    transition: all 0.2s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.run-btn:hover {
    background-color: #44b663;
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.4);
}

.run-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

h2 {
    font-size: 1.5rem;
    text-align: center;
    color: var(--text-color-light);
    margin-top: 3rem;
    margin-bottom: 1rem;
}

hr {
    border: 0;
    height: 1px;
    background-image: linear-gradient(to right,
            rgba(0, 0, 0, 0),
            rgba(110, 122, 145, 0.75),
            rgba(0, 0, 0, 0));
    margin: 1.5rem 0;
}

/* Codemirror styling for responsiveness */
.CodeMirror {
    height: 60vh;
    min-height: 300px;
    font-family: 'Fira Code', monospace;
    font-size: 15px;
    border-radius: 0 0 10px 10px;
}

.CodeMirror-vscrollbar {
    border-radius: 0 10px 10px 0;
}

/* --- Media Queries --- */
@media (max-width: 768px) {
    body {
        padding: 1rem;
    }

    h1 {
        font-size: clamp(1.5rem, 5vw, 2rem);
    }

    .file-list {
        gap: 0.5rem;
    }

    .file-btn {
        padding: 0.5rem 0.8rem;
        font-size: 0.85rem;
    }

    .editor-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    h3#fileName {
        font-size: 1rem;
    }

    .CodeMirror {
        height: 50vh;
        min-height: 250px;
        font-size: 14px;
    }

    .run-btn {
        font-size: 1rem;
        padding: 0.8rem 2rem;
    }
}

.navigation-buttons {
    padding: 0.75rem 1rem;
}

.nav-btn {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
}


.run-btn {
    font-size: 1rem;
    padding: 0.8rem 2rem;
}

.navigation-buttons {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding: 0 1rem;
}

.nav-btn {
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    color: var(--primary-color);
    padding: 0.6rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    font-size: 0.95rem;
    font-family: 'Fira Code', monospace;
}

.nav-btn:hover {
    background-color: var(--btn-hover-bg);
}