:root {
    --bg: #121212;
    --sidebar: #181818;
    --border: #282828;
    --text-main: #d1d5db;
    --text-dim: #6b7280;
    --accent: #4ade80;
    --link: #60a5fa;
    --danger: #ef4444;
}

/* =========================================
   Mobile First Base Styles
========================================= */

body {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    background-color: var(--bg);
    color: var(--text-main);
    margin: 0;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: auto;
}

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: calc(100% - 2rem);
    z-index: 1000;
    background: var(--sidebar);
    padding: 1rem;
    border-right: none;
    border-bottom: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 0;
    font-size: 0.85rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5); 
}

.nav-brand-container {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    margin-bottom: 0;
}

.nav-brand {
    color: #fff;
    font-weight: bold;
    letter-spacing: 1px;
    margin-bottom: 0;
}

.hamburger-btn {
    display: flex;
    align-items: center;
    background: transparent;
    border: none;
    color: var(--text-main);
    cursor: pointer;
    padding: 4px;
    transition: color 0.2s;
}

.hamburger-btn:hover {
    color: var(--link);
}

.nav-menu-container {
    display: none;
    width: 100%;
    padding-top: 1rem;
    flex-direction: column;
    max-height: calc(100vh - 65px); 
    overflow-y: auto; 
}

.nav-menu-container.is-open {
    display: flex;
}

.nav-group {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    width: 100%;
    gap: 0.5rem 1rem;
    margin-bottom: 4px;
}

.nav-group.nav-group-sub {
    width: calc(100% - 12px);
    padding-left: 12px;
}

.nav-header {
    font-weight: 600;
    color: var(--text-dim);
    letter-spacing: 0.1em;
    width: calc(100% - 16px);
    font-size: 0.75rem;
    padding: 12px 8px 4px 8px;
    margin: 0;
}

.nav-item {
    color: var(--text-dim);
    text-decoration: none;
    transition: 0.2s;
    font-size: 0.75rem;
    padding: 4px 8px;
    border-left: none;
    border-bottom: 2px solid transparent;
    margin: 0;
}

.nav-item:hover {
    color: var(--link);
}

.nav-item.active {
    color: var(--link);
    padding-left: 8px;
    border-bottom-color: var(--link);
}

.nav-item.nav-sub {
    margin-left: 0;
    padding-left: 8px;
}

.main-content {
    flex: 1;
    margin-top: 60px;
    padding: 1.5rem;
}

.doc-header {
    border-bottom: 1px solid var(--border);
    margin-bottom: 2rem;
    padding-bottom: 1rem;
}

.doc-header h2 {
    font-size: 1.2rem;
    color: #fff;
    margin: 0;
}

.doc-header p {
    color: var(--text-dim);
    font-size: 0.8rem;
    margin: 0.5rem 0 0;
}

/* =========================================
   Desktop Styles (min-width: 769px)
========================================= */
@media (min-width: 769px) {
    body {
        flex-direction: row;
        overflow: hidden;
    }

    .sidebar {
        position: static;
        width: 240px;
        z-index: auto;
        padding: 1.5rem;
        border-bottom: none;
        border-right: 1px solid var(--border);
        gap: 1rem;
        box-shadow: none;
    }

    .nav-brand-container {
        width: auto;
        margin-bottom: 1rem;
    }

    .nav-brand {
        margin-bottom: 1rem;
    }

    .hamburger-btn {
        display: none;
    }

    .nav-menu-container {
        display: flex;
        width: auto;
        gap: 10px;
        padding-top: 0;
        max-height: none;
        overflow-y: visible;
    }

    .nav-group {
        flex-direction: column;
        flex-wrap: nowrap;
        width: auto;
        gap: 10px;
        margin-bottom: 0;
    }

    .nav-group.nav-group-sub {
        width: 100%;
        padding-left: 0;
        margin-bottom: 10px;
    }

    .nav-header {
        width: 100%;
        font-size: 0.85rem;
        padding: 0;
        margin-top: 10px;
    }

    .nav-item {
        font-size: inherit; /* Fallback to sidebar font-size */
        padding: 6px 0;
        border-bottom: none;
        border-left: 2px solid transparent;
    }

    .nav-item.active {
        padding-left: 10px;
        border-bottom-color: transparent;
        border-left-color: var(--link);
    }

    .nav-item.nav-sub {
        font-size: 0.8rem;
        margin-left: 1.2rem;
        padding-left: 0;
    }

    .main-content {
        margin-top: 0;
        padding: 2rem 4rem;
        overflow-y: auto;
    }
}