/* ==========================================================================
   Knowledge Base styles
   --------------------------------------------------------------------------
   Loaded by:
     1. kb.html  — provides the shell layout (tree + iframe).
     2. each individual document HTML in kb/  — provides typography for
        the content rendered inside the iframe.
   Color tokens come from ../style.css.
   ========================================================================== */


/* ----- Shell layout (left tree + right iframe) ---------------------------- */

.kb-app {
    display: flex;
    height: calc(100vh - 64px);
    overflow: hidden;
    background: var(--white);
}

.kb-tree {
    width: 280px;
    flex-shrink: 0;
    background: var(--bg-light);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    padding: 1.25rem 0.875rem 2rem;
    box-sizing: border-box;
}

.kb-tree-title {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-gray);
    margin: 0 0.5rem 0.875rem;
    font-weight: 700;
}

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

.kb-folder-label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.5rem;
    color: var(--text-dark);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: 4px;
    user-select: none;
}

.kb-folder-label:hover {
    background: rgba(255, 255, 255, 0.04);
}

.kb-folder-arrow {
    width: 10px;
    height: 10px;
    color: var(--text-gray);
    transition: transform 0.15s ease;
    flex-shrink: 0;
}

.kb-folder.collapsed .kb-folder-arrow {
    transform: rotate(-90deg);
}

.kb-folder.collapsed > .kb-folder-children {
    display: none;
}

.kb-tree ul.kb-folder-children {
    padding-left: 0.75rem;
    margin: 0.1rem 0 0.3rem 0.9rem;
    border-left: 1px dashed var(--border-color);
}

.kb-doc-link {
    display: block;
    padding: 0.35rem 0.6rem;
    color: var(--text-gray);
    font-size: 0.875rem;
    border-radius: 4px;
    transition: background 0.15s, color 0.15s;
    cursor: pointer;
}

.kb-doc-link:hover {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-dark);
}

.kb-doc-link.active {
    background: rgba(96, 165, 250, 0.12);
    color: var(--primary-light);
    font-weight: 600;
}

.kb-content-frame {
    flex: 1;
    border: none;
    background: var(--white);
    height: 100%;
    width: 100%;
}

.kb-tree-toggle {
    display: none;
    background: var(--bg-light);
    color: var(--text-dark);
    border: none;
    border-bottom: 1px solid var(--border-color);
    padding: 0.65rem 1rem;
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    text-align: left;
    width: 100%;
    cursor: pointer;
}

.kb-tree-toggle svg {
    vertical-align: -3px;
    margin-right: 0.4rem;
}

@media (max-width: 768px) {
    .kb-app {
        flex-direction: column;
        height: auto;
    }
    .kb-tree-toggle {
        display: block;
    }
    .kb-tree {
        width: 100%;
        max-height: 50vh;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    .kb-tree.collapsed {
        display: none;
    }
    .kb-content-frame {
        height: calc(100vh - 64px - 41px);
    }
}


/* ----- Document content (used inside each kb/ document) ------------------- */

body.kb-doc {
    background: var(--white);
    color: var(--text-dark);
    font-family: 'Courier New', monospace;
    line-height: 1.7;
    margin: 0;
    padding: 3rem 2.5rem 5rem;
}

.kb-doc-content {
    max-width: 820px;
    margin: 0 auto;
}

.kb-doc-eyebrow {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--primary-light);
    background: rgba(96, 165, 250, 0.1);
    padding: 3px 9px;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.kb-doc h1 {
    font-size: 2.1rem;
    color: var(--text-dark);
    font-weight: 600;
    letter-spacing: -0.75px;
    margin: 0 0 0.4rem;
    line-height: 1.2;
}

.kb-doc-lede {
    font-size: 1.0625rem;
    color: var(--text-gray);
    line-height: 1.65;
    margin: 0 0 2rem;
    padding-bottom: 1.75rem;
    border-bottom: 1px solid var(--border-color);
}

.kb-doc h2 {
    font-size: 1.5rem;
    color: var(--text-dark);
    font-weight: 600;
    letter-spacing: -0.4px;
    margin: 2.5rem 0 0.75rem;
}

.kb-doc h3 {
    font-size: 1.0625rem;
    color: var(--primary-light);
    font-weight: 600;
    margin: 1.75rem 0 0.5rem;
}

.kb-doc p {
    color: var(--text-gray);
    font-size: 0.9875rem;
    margin: 0 0 1rem;
}

.kb-doc strong {
    color: var(--text-dark);
    font-weight: 600;
}

.kb-doc em {
    color: var(--text-dark);
    font-style: italic;
}

.kb-doc a {
    color: var(--primary-light);
    text-decoration: none;
    border-bottom: 1px dashed rgba(96, 165, 250, 0.4);
}

.kb-doc a:hover {
    border-bottom-style: solid;
}

.kb-doc ul,
.kb-doc ol {
    color: var(--text-gray);
    padding-left: 1.5rem;
    margin: 0 0 1rem;
    font-size: 0.9875rem;
}

.kb-doc li {
    margin-bottom: 0.4rem;
}

.kb-doc li::marker {
    color: var(--primary-light);
}

.kb-doc code {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 1px 6px;
    font-size: 0.9em;
    color: var(--primary-light);
    font-family: 'Courier New', monospace;
}

.kb-doc pre {
    background: var(--terminal-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem 1.25rem;
    overflow-x: auto;
    margin: 1.25rem 0;
    color: var(--terminal-text);
    font-size: 0.85rem;
    line-height: 1.65;
}

.kb-doc pre code {
    background: none;
    border: none;
    padding: 0;
    color: var(--terminal-text);
    font-size: inherit;
}

.kb-doc pre .prompt { color: var(--terminal-green); }
.kb-doc pre .comment { color: var(--terminal-dim); }

.kb-doc blockquote {
    border-left: 3px solid var(--primary);
    padding: 0.6rem 1rem;
    margin: 1.25rem 0;
    color: var(--text-gray);
    background: rgba(26, 54, 93, 0.18);
    border-radius: 0 4px 4px 0;
}

.kb-doc blockquote p:last-child {
    margin-bottom: 0;
}

.kb-doc hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 2.5rem 0;
}

.kb-doc table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.25rem 0;
    font-size: 0.9rem;
}

.kb-doc th,
.kb-doc td {
    text-align: left;
    padding: 0.6rem 0.85rem;
    border-bottom: 1px solid var(--border-color);
}

.kb-doc th {
    color: var(--text-dark);
    font-weight: 600;
    background: rgba(255, 255, 255, 0.03);
}

.kb-doc td {
    color: var(--text-gray);
}

.kb-doc-callout {
    background: rgba(34, 197, 94, 0.06);
    border: 1px solid rgba(34, 197, 94, 0.25);
    border-radius: 8px;
    padding: 1rem 1.25rem;
    margin: 1.5rem 0;
}

.kb-doc-callout p:last-child {
    margin-bottom: 0;
}

.kb-doc-callout-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
    font-weight: 700;
    margin-bottom: 0.4rem;
}

.kb-code-wrap {
    position: relative;
}

.kb-copy-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 4px;
    line-height: 0;
    background: transparent;
    color: rgba(255, 255, 255, 0.72);
    border: none;
    cursor: pointer;
    z-index: 1;
}

.kb-copy-btn:hover {
    color: rgba(255, 255, 255, 0.95);
}

@media (max-width: 640px) {
    body.kb-doc { padding: 2rem 1.25rem 4rem; }
    .kb-doc h1 { font-size: 1.65rem; }
    .kb-doc h2 { font-size: 1.25rem; }
}