:root {
    /* Live Attentive Palette */
    --carbon-black: #0A0A0A;
    --pulse-teal: #00E0A7;
    --graphite-gray: #2E2E2E;
    --pure-white: #FFFFFF;
    --dim-text: #A0A0A0;
    
    /* Spacing & Layout */
    --sidebar-width: 280px;
}

body {
    margin: 0;
    background-color: var(--carbon-black);
    color: var(--pure-white);
    font-family: 'Montserrat', sans-serif; /*  */
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    height: 100%;
}

/* --- SIDEBAR --- */
.sidebar {
    width: var(--sidebar-width);
    background-color: #111; /* Slightly lighter than Carbon Black */
    border-right: 1px solid var(--graphite-gray); /* [cite: 97] */
    display: flex;
    flex-direction: column;
    padding: 2rem;
}

.brand-header h1 {
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: 2px;
    margin-bottom: 2rem;
    color: var(--pure-white);
}

.nav-item {
    display: block;
    padding: 10px 0;
    color: var(--dim-text);
    text-decoration: none;
    font-size: 1.2rem;
    transition: all 0.2s ease;
    cursor: pointer;
    border-left: 2px solid transparent;
    padding-left: 10px;
}

.nav-item:hover, .nav-item.active {
    color: var(--pulse-teal); /* [cite: 93] */
    border-left: 2px solid var(--pulse-teal);
    padding-left: 15px;
}

/* --- CONTENT --- */
.content-viewer {
    flex: 1;
    padding: 3rem 4rem;
    overflow-y: auto;
    background-color: var(--carbon-black);
}

/* Markdown Styles */
.markdown-body h1, .markdown-body h2, .markdown-body h3 {
    font-weight: 800;
    margin-top: 1.5em;
    color: var(--pure-white);
}

.markdown-body h1 {
    border-bottom: 2px solid var(--pulse-teal); /* Brand accent */
    padding-bottom: 0.5rem;
    display: inline-block;
}

.markdown-body p {
    line-height: 1.6;
    color: #DDD;
    max-width: 800px;
}

.markdown-body code {
    background-color: var(--graphite-gray);
    padding: 0.2em 0.4em;
    border-radius: 3px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9em;
}

.markdown-body pre code {
    background-color: transparent;
    padding: 0;
}

.markdown-body pre {
    background: #151515;
    padding: 1rem;
    border: 1px solid var(--graphite-gray);
    border-radius: 5px;
    overflow-x: auto;
}

.markdown-body blockquote {
    border-left: 4px solid var(--pulse-teal);
    margin: 0;
    padding-left: 1rem;
    color: var(--dim-text);
    font-style: italic;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--carbon-black);
}
::-webkit-scrollbar-thumb {
    background: var(--graphite-gray);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--pulse-teal);
}