:root {
    --bg-color: #121212;
    --surface-color: #1e1e1e;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --accent-color: #00e676; /* Kush Green */
    --accent-hover: #69f0ae;
    --border-color: #333;
    --code-bg: #272822;
    --font-main: 'Roboto', -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    --font-mono: 'Fira Code', 'Consolas', monospace;
    --sidebar-width: 250px;
    --header-height: 60px;
    --spacing-unit: 1rem;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    overflow-wrap: break-word;
    word-break: break-word;
}

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

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

/* Layout Grid */
.app-layout {
    display: grid;
    grid-template-areas:
        "header header"
        "sidebar main";
    grid-template-rows: var(--header-height) 1fr;
    grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
    min-height: 100vh;
}

/* Header */
.top-bar {
    grid-area: header;
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-unit);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 4px rgba(0,0,0,0.5);
    min-width: 0;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 1;
    min-width: 0;
}

.logo-img {
    height: 40px;
    flex-shrink: 0;
}

.logo-text {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--accent-color);
    font-family: 'Ubuntu', sans-serif;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Sidebar */
.sidebar {
    grid-area: sidebar;
    background-color: var(--bg-color);
    border-right: 1px solid var(--border-color);
    padding: var(--spacing-unit);
    overflow-y: auto;
    position: sticky;
    top: var(--header-height);
    height: calc(100vh - var(--header-height));
    min-width: 0;
}

.nav-link {
    display: block;
    padding: 10px 15px;
    color: var(--text-secondary);
    border-radius: 4px;
    margin-bottom: 5px;
    font-weight: 400;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.nav-link.active {
    background-color: rgba(0, 230, 118, 0.1);
    color: var(--accent-color);
    border-left: 3px solid var(--accent-color);
}

/* Main Content */
.main-content {
    grid-area: main;
    padding: 2rem;
    max-width: 900px;
    margin: 0 auto;
    width: 100%;
    min-width: 0;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-family: 'Ubuntu', sans-serif;
}

h1 { font-size: 2.5rem; border-bottom: 1px solid var(--border-color); padding-bottom: 0.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

p, ul, ol {
    margin-bottom: 1.2rem;
}

code {
    font-family: var(--font-mono);
    background-color: rgba(255, 255, 255, 0.1);
    padding: 0.2em 0.4em;
    border-radius: 3px;
    font-size: 0.9em;
}

pre {
    background-color: var(--code-bg) !important;
    border-radius: 6px;
    padding: 1rem !important;
    margin: 1.5rem 0;
    overflow-x: auto;
    border: 1px solid var(--border-color);
}

/* Utilities */
.flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
}

.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.menu-toggle {
    display: none;
}

/* File Tree Visualization */
.file-tree {
    list-style: none;
    padding-left: 0;
    font-family: var(--font-mono);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1rem;
    background-color: var(--surface-color);
    margin-bottom: 1.5rem;
}

.file-tree ul {
    list-style: none;
    padding-left: 1.5rem;
    margin-bottom: 0;
    border-left: 1px solid var(--border-color);
}

.file-tree li {
    position: relative;
    padding-left: 0.5rem;
    margin: 0.2rem 0;
}

.file-tree .folder {
    color: var(--accent-color);
    font-weight: bold;
}

.file-tree .folder::before {
    content: "📁 ";
    margin-right: 0.2rem;
}

.file-tree .file {
    color: var(--text-primary);
}

.file-tree .file::before {
    content: "📄 ";
    margin-right: 0.2rem;
}


/* Mobile Responsive */
@media (max-width: 768px) {
    .app-layout {
        grid-template-areas:
            "header"
            "main";
        grid-template-columns: 1fr;
        grid-template-rows: var(--header-height) 1fr;
    }

    .menu-toggle {
        display: block;
        background: none;
        border: none;
        color: var(--text-primary);
        font-size: 1.5rem;
        cursor: pointer;
    }

    .sidebar {
        position: fixed;
        top: var(--header-height);
        left: -100%;
        width: 80%;
        max-width: 300px;
        height: calc(100vh - var(--header-height));
        z-index: 99;
        transition: left 0.3s ease;
        background-color: var(--bg-color);
        display: block;
    }

    body.mobile-open .sidebar {
        left: 0;
        box-shadow: 5px 0 15px rgba(0,0,0,0.5);
    }

    .mobile-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background: rgba(0,0,0,0.7);
        z-index: 98;
    }

    body.mobile-open .mobile-overlay {
        display: block;
    }

    /* Prevent scrolling when menu is open */
    body.mobile-open {
        overflow: hidden;
    }

    .main-content {
        padding: 1rem;
    }
}