/* --- Global Reset --- */
*, *::before, *::after {
    box-sizing: border-box;
}
/* --- Base Theme & Terminal Colors --- */
:root {
    --bg-main: #0d1117;       /* Deep dark background */
    --bg-sidebar: #161b22;    /* Slightly lighter for contrast */
    --text-main: #c9d1d9;     /* Soft white for reading */
    --accent-green: #238636;  /* Terminal green */
    --accent-hover: #2ea043;
    --border-color: #30363d;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
}

a {
    color: var(--accent-green);
    text-decoration: none;
    transition: color 0.2s ease-in-out;
}

a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

/* --- Top Navigation Bar --- */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background-color: var(--bg-sidebar);
    border-bottom: 1px solid var(--border-color);
}

.navbar .logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-main);
    font-family: monospace;
}

.logo-img {
    height: 1.5rem;          
    width: auto;             
    vertical-align: middle;  
    margin-right: 8px;       
}

.logo a {
    text-decoration: none;   
    display: flex;           
    align-items: center;     
}

.navbar nav a {
    margin-left: 1.5rem;
    color: var(--text-main);
    font-weight: 500;
}

.navbar nav a:hover {
    color: var(--accent-green);
}

/* --- Main Layout Structure --- */
.container {
    display: flex;
    max-width: 1200px;
    margin: 0 auto;
    min-height: calc(100vh - 70px);
}

/* --- Sidebar --- */
.sidebar {
    width: 250px;
    background-color: var(--bg-sidebar);
    padding: 2rem 1.5rem;
    border-right: 1px solid var(--border-color);
}

.sidebar h3 {
    font-size: 0.9rem;
    text-transform: uppercase;
    color: #8b949e;
    letter-spacing: 0.05em;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

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

.sidebar li {
    margin-bottom: 0.5rem;
}

.sidebar a {
    color: var(--text-main);
    font-size: 0.95rem;
}

.sidebar a:hover {
    color: var(--accent-green);
}

/* --- Main Content Area --- */
.content {
    flex: 1;
    padding: 2rem 3rem;
}

.content h1 {
    font-size: 2.5rem;
    margin-top: 0;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

/* --- Guide Preview Cards --- */
.guide-preview {
    background-color: var(--bg-sidebar);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    margin-top: 2rem;
}

.guide-preview h2 {
    margin-top: 0;
    font-size: 1.4rem;
}

.read-more {
    display: inline-block;
    margin-top: 1rem;
    font-weight: bold;
    font-family: monospace;
    font-size: 1.1rem;
}

/* --- Hero Section & Buttons (Consolidated) --- */
.hero-subtitle {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--accent-green);
}

.hero-actions {
    display: flex;
    gap: 15px;
    margin-top: 2rem;
}

.btn-primary, .btn-secondary {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 4px;
    font-weight: bold;
    text-align: center;
    white-space: nowrap; 
    text-decoration: none; /* Stops the hover underline */
}

.btn-primary {
    background-color: var(--accent-green);
    color: #fff;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    color: #fff;
    text-decoration: none;
}

.btn-secondary {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

.btn-secondary:hover {
    border-color: var(--text-main);
    text-decoration: none;
}

/* --- Next/Prev Guide Navigation --- */
.guide-nav {
    display: flex;
    justify-content: space-between;
    gap: 15px;
    margin-top: 2rem;
    font-weight: bold;
}

.guide-nav a {
    flex: 1;
    text-align: center;
}

.section-divider {
    border: 0;
    height: 1px;
    background: var(--border-color);
    margin: 3rem 0;
}

/* --- Documentation Grid --- */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.doc-card {
    background-color: var(--bg-sidebar);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: transform 0.2s;
}

.doc-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-green);
}

.doc-card h3 {
    margin-top: 0;
    font-size: 1.2rem;
}

.doc-card .icon {
    margin-right: 0.5rem;
}

/* --- SEO & FAQ Sections --- */
.seo-about-linux, .faq-section {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px dashed var(--border-color);
}

.faq-item {
    margin-bottom: 1.5rem;
}

.faq-item h3 {
    color: var(--accent-green);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.faq-item p {
    margin-top: 0;
}

/* --- Keyboard Key Styling --- */
kbd {
    background-color: #1e1e2e;
    color: #cdd6f4;
    font-family: monospace;
    font-size: 0.85rem;
    font-weight: bold;
    padding: 3px 6px;
    border-radius: 4px;
    border: 1px solid #45475a;
    border-bottom: 3px solid #313244; /* Gives it a 3D pushed-up look */
    box-shadow: 0 2px 0 rgba(0, 0, 0, 0.2);
    display: inline-block;
}


/* --- Custom Callout Boxes --- */
.callout-warning {
    border-left: 4px solid #f9e2af;
    background-color: rgba(249, 226, 175, 0.1);
    padding: 1.2rem 1.5rem;
    border-radius: 4px;
    margin: 1.5rem 0;
    color: var(--text-main);
}

.callout-info {
    border-left: 4px solid #89b4fa;
    background-color: rgba(137, 180, 250, 0.1);
    padding: 1.2rem 1.5rem;
    border-radius: 4px;
    margin: 1.5rem 0;
    color: var(--text-main);
}

/* --- Cheat Sheet Box --- */
.cheat-sheet-box {
    background-color: var(--bg-sidebar);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    margin: 1.5rem 0 2rem 0;
}
.cheat-sheet-box p {
    margin: 0.8rem 0;
}


/* --- Code Block Containers --- */
.code-block-container {
    background-color: #1e1e2e; 
    padding: 15px; 
    border-radius: 8px; 
    margin-bottom: 20px;
}

.code-label {
    margin-top: 0; 
    color: #a6adc8; 
    font-weight: bold; 
    border-bottom: 1px solid #45475a; 
    padding-bottom: 5px;
}

/* --- Terminal Specific Text Formatting --- */
.terminal-cmd {
    font-family: monospace;
    color: #cdd6f4;
    margin: 0;
    font-size: 1rem;
}

.terminal-comment {
    font-family: monospace;
    color: #8b949e;
    margin: 0;
    font-size: 0.85rem;
}







/* --- Mobile Menu Button --- */
.hamburger {
    display: none;
    background-color: var(--accent-green);
    color: #ffffff;
    border: none;
    padding: 0.8rem 1.5rem;
    font-size: 1.2rem;
    font-family: monospace;
    font-weight: bold;
    cursor: pointer;
    border-radius: 6px;
    transition: background-color 0.2s;
    text-decoration: none; /* Keeps the menu text clean */
}

.hamburger:hover {
    background-color: var(--accent-hover);
}

/* --- Split Layout for Customization Section --- */
.split-layout {
    display: flex;
    gap: 2rem;
    margin-top: 1.5rem;
    align-items: center;
}

.split-layout .text-content {
    flex: 2;
}

.split-layout .feature-box {
    flex: 1;
    background-color: var(--bg-sidebar);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.feature-box h4 {
    margin-top: 0;
    color: var(--accent-green);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

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

.feature-box li {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

/* --- Hardware & Rescue --- */
.hardware-rescue {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px dashed var(--border-color);
}

/* --- Cheat Sheets Tag Cloud --- */
.cheat-sheets {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px dashed var(--border-color);
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 1.5rem;
}

.tag {
    background-color: var(--bg-sidebar);
    color: var(--text-main);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    font-size: 0.9rem;
    font-family: monospace;
    transition: all 0.2s;
}

.tag:hover {
    background-color: var(--accent-green);
    color: #fff;
    border-color: var(--accent-green);
    text-decoration: none;
    transform: translateY(-2px);
}




/* --- Code and Command Styling --- */
article code {
    background-color: #1e1e2e;
    color: #a6e3a1; /* Terminal Green */
    font-family: monospace;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.95rem;
}



/* ========================================================= */
/* --- MOBILE RESPONSIVENESS (Where the magic happens) ---   */
/* ========================================================= */

@media screen and (max-width: 768px) {
    .split-layout {
        flex-direction: column;
    }

    .hamburger {
        display: block; 
        width: 100%;
        margin-top: 1rem;
    }

    .container {
        flex-direction: column;
    }

    .sidebar {
        display: none; 
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding: 1.5rem;
        box-sizing: border-box;
        background-color: #0d1117;
    }

    .sidebar.show {
        display: block;
        animation: slideDown 0.3s ease-out forwards;
    }

    .content {
        padding: 1.5rem;
    }

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

    .navbar nav a {
        margin-left: 0;
        margin-right: 1.5rem;
        display: inline-block;
        padding-top: 0.5rem;
    }

    .content h1 {
        font-size: 2rem;
    }

    /* --- MOBILE BUTTON FIXES --- */
    .hero-actions, .guide-nav {
        flex-direction: column; /* Stacks the buttons vertically */
        gap: 10px;
    }

    .btn-primary, .btn-secondary {
        white-space: normal; /* Allows text to wrap if needed */
        width: 100%;         /* Makes buttons full width on phones */
        box-sizing: border-box; 
    }
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}



/* --- Table Styling for Config Page --- */
table {
    width: 100%;
    margin: 20px 0;
    border-collapse: collapse;
    background-color: #1e1e2e;
    border-radius: 8px;
    overflow: hidden; /* Keeps the rounded corners */
}

th {
    background-color: #313244;
    color: var(--accent-green);
    text-align: left;
    padding: 12px;
}

td {
    padding: 12px;
    border-bottom: 1px solid #45475a;
}

tr:last-child td {
    border-bottom: none;
}