/* --- Sidebar (kept mostly as provided) --- */
.sidebar {
    width: 260px;
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    background-color: #111;
    padding: 20px;
    border-right: 2px solid #00ff00;
    color: #00ff00;
    font-family: monospace;
    overflow-y: auto;
    transition: transform 0.3s ease-in-out;
}

.sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar ul li {
    margin: 12px 0;
}

.sidebar ul li a {
    text-decoration: none;
    color: #00ff00;
    font-size: 1.1em;
    display: block;
    padding: 8px;
    transition: background 0.3s, transform 0.2s;
    border-left: 3px solid transparent;
}

.sidebar ul li a:hover {
    background-color: rgba(0, 255, 0, 0.2);
    border-left: 3px solid #00ff00;
    transform: translateX(5px);
}

.sidebar ul li a::after {
    content: "_";
    animation: blink 1s infinite;
}

@keyframes blink {
    50% {
        opacity: 0;
    }
}

/* Sidebar toggle for mobile */
.sidebar-toggle {
    display: none;
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-toggle {
        display: block;
        position: fixed;
        top: 10px;
        left: 10px;
        background-color: #00ff00;
        color: #121212;
        padding: 10px;
        border-radius: 5px;
        z-index: 1001;
    }
}

/* --- Terminal-Themed Content --- */
.content {
    margin-left: 300px;
    /* Space for sidebar */
    padding: 40px 30px;
    background-color: #121212;
    color: #00ff00;
    font-family: 'Courier New', Courier, monospace;
    border-left: 2px solid #00ff00;
    box-shadow: inset 0 0 15px #00ff00;
    position: relative;
}

/* CRT Scanline Effect */
.content::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    background-image: repeating-linear-gradient(to bottom,
            rgba(0, 255, 0, 0.02) 0px,
            rgba(0, 255, 0, 0.02) 1px,
            transparent 1px,
            transparent 2px);
    z-index: -1;
}

/* Headings */
.title,
h2 {
    text-transform: uppercase;
    font-size: 1.8em;
    text-align: center;
    margin-bottom: 25px;
    color: #00ff00;
    text-shadow: 0 0 8px #00ff00;
    animation: pulseText 2s infinite alternate;
}

@keyframes pulseText {
    0% {
        text-shadow: 0 0 8px #00ff00;
    }

    100% {
        text-shadow: 0 0 14px #00ff00;
    }
}

/* Paragraphs */
p {
    line-height: 1.8;
    font-size: 1em;
    margin: 15px 0;
    color: #aaffaa;
}

/* Code Snippets */
.code,
code {
    background-color: rgba(0, 255, 0, 0.1);
    color: #00ff00;
    border: 1px solid #00ff00;
    padding: 3px 6px;
    border-radius: 4px;
    font-size: 0.95em;
    text-shadow: 0 0 5px #00ff00;
}

/* --- Terminal Box (used for quiz & simulator) --- */
.terminal-box {
    background: #000;
    border: 2px solid #00ff00;
    border-radius: 6px;
    padding: 20px;
    margin: 30px 0;
    font-size: 0.95em;
    box-shadow: 0 0 10px #00ff00;
}

/* Quiz Section Styling */
#quiz-section h2 {
    margin-bottom: 15px;
}

#quiz-section ul {
    list-style: none;
    padding: 0;
}

#quiz-section ul li {
    margin: 10px 0;
}

.quiz-result {
    margin-top: 10px;
    font-weight: bold;
}

/* Simulator Section Styling */
#simulator-section h2 {
    margin-bottom: 15px;
}

.simulator {
    display: flex;
    align-items: center;
    margin: 10px 0;
}

.simulator .prompt {
    margin-right: 8px;
    font-weight: bold;
}

.simulator input {
    background: #000;
    border: 1px solid #00ff00;
    color: #00ff00;
    padding: 6px;
    width: 100%;
    font-family: inherit;
}

.sim-output {
    margin-top: 15px;
    background: #000;
    padding: 15px;
    border: 1px solid #00ff00;
    color: #00ff00;
    min-height: 80px;
}

/* Lists */
ul {
    padding-left: 20px;
    margin-top: 10px;
}

ul li {
    margin: 8px 0;
    position: relative;
    padding-left: 16px;
    font-size: 0.95em;
    color: #ccffcc;
}

ul li::before {
    content: "➤";
    position: absolute;
    left: 0;
    color: #00ff00;
    animation: blinkArrow 1.5s infinite;
}

@keyframes blinkArrow {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.3;
    }
}

/* Mermaid Diagram */

.merm-container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    overflow-x: auto;
    padding: 1rem 0;
}

.mermaid {
    background-color: #1a1a1a;
    padding: 15px;
    border: 1px solid #00ff00;
    border-radius: 10px;
    font-size: 1.2em;
    min-width: 800px; /* prevent too small diagram */
    max-width: 100%;
    overflow-x: auto;
    box-shadow: 0 0 12px #00ff00a0;
}


.mermaid svg {
    width: 100% !important;
    height: auto !important;
}

/* Hover Effects */
.content p:hover,
.content li:hover {
    color: #ffffff;
    background: rgba(0, 255, 0, 0.05);
    transition: all 0.3s ease;
}

/* Animated Terminal Cursor */
.content::after {
    content: "";
    display: inline-block;
    width: 10px;
    height: 20px;
    background-color: #00ff00;
    animation: blinkCursor 1s step-start infinite;
    margin-left: 5px;
}

@keyframes blinkCursor {
    50% {
        opacity: 0;
    }
}

/* Buttons */
button {
    background-color: #000;
    color: #00ff00;
    border: 1px solid #00ff00;
    padding: 8px 12px;
    font-family: 'Courier New', monospace;
    margin: 5px 0;
    cursor: pointer;
    transition: all 0.3s ease-in-out;
    border-radius: 4px;
    box-shadow: 0 0 4px #00ff00;
}

button:hover {
    background-color: #003300;
    box-shadow: 0 0 10px #00ff00;
}