/* ============================================================
   Puspo Knowledge Center — Frontend Styles
   Design: Stripe Docs-style  (left nav | content | TOC)
   ============================================================ */

/* Variables */
:root {
    --pkc-sidebar-w:   220px;
    --pkc-toc-w:       180px;
    --pkc-text:        #1a1f36;
    --pkc-muted:       #ffffff;
    --pkc-border:      #0839184d;
    --pkc-bg:          #fff4e2;
    --pkc-sidebar-bg:  #083918;
    --pkc-accent:      #00070ff;
    --pkc-accent-bg:   #ddbf15;
    --pkc-radius:      8px;
    --pkc-font:        -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
}
/* Reset within our scope */
.pkc-root *,
.pkc-root *::before,
.pkc-root *::after { box-sizing: border-box; margin: 0; padding: 0; }

.pkc-root {
    font-family: var(--pkc-font);
    color: var(--pkc-text);
    background: var(--pkc-bg);
    font-size: 16px;
    line-height: 1.6;
}

/* ── Top Search Bar ──────────────────────────────────────── */
.pkc-topbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--pkc-bg);
    border-bottom: 1px solid var(--pkc-border);
    padding: 10px 20px;
}

.pkc-search-wrap {
    position: relative;
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    background: #f2ebd7;
    border: 1px solid var(--pkc-border);
    border-radius: 6px;
    padding: 0px 14px;
    gap: 8px;
    transition: border-color .15s, box-shadow .15s;
}
.pkc-search-wrap:focus-within {
    border-color: var(--pkc-accent);
    box-shadow: 0 0 0 3px rgba(0,112,243,.12);
    background: #fff;
}
.pkc-search-icon { font-size: 14px; flex-shrink: 0; }
#pkc-search {
    border: none;
    background: transparent;
    width: 100%;
    font-size: 14px;
    color: var(--pkc-text);
    outline: none;
}
#pkc-search::placeholder { color: #9ca3af; }

/* Dropdown */
.pkc-search-dropdown {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    background: #fff;
    border: 1px solid var(--pkc-border);
    border-radius: var(--pkc-radius);
    box-shadow: 0 8px 30px rgba(0,0,0,.12);
    max-height: 400px;
    overflow-y: auto;
    z-index: 200;
}
.pkc-dd-item {
    display: block;
    padding: 12px 16px;
    border-bottom: 1px solid var(--pkc-border);
    cursor: pointer;
    text-decoration: none;
    color: var(--pkc-text);
    transition: background .1s;
}
.pkc-dd-item:last-child { border-bottom: none; }
.pkc-dd-item:hover { background: var(--pkc-accent-bg); }
.pkc-dd-item-title { font-weight: 600; font-size: 14px; color: var(--pkc-text); margin-bottom: 2px; }
.pkc-dd-item-exc   { font-size: 12px; color: var(--pkc-text); }
.pkc-dd-item-cats  { margin-top: 4px; }
.pkc-dd-no-result  { padding: 20px 16px; text-align: center; color: var(--pkc-text); }
.pkc-dd-no-result strong { display: block; color: var(--pkc-text); font-size: 14px; margin-bottom: 4px; }
.pkc-dd-no-result span { font-size: 12px; }

/* ── 3-Column Layout ─────────────────────────────────────── */
.pkc-layout {
    display: flex;
    align-items: flex-start;
    min-height: 100vh;
}

/* ── LEFT SIDEBAR ────────────────────────────────────────── */
.pkc-sidebar {
    width: var(--pkc-sidebar-w);
    flex-shrink: 0;
    background: var(--pkc-sidebar-bg);
    border-right: 1px solid var(--pkc-border);
    padding: 24px 0;
    position: sticky;
    top: 53px; /* below topbar */
    height: calc(100vh - 53px);
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: #d1d5db transparent;
}
.pkc-sidebar a:focus { background: #083918!important; color: #fff!important; }

.pkc-sidebar-close { display: none; }

.pkc-nav { padding: 0 0 40px; }

.pkc-nav-home {
    display: block;
    padding: 6px 20px;
    font-size: 16px;
    font-weight: 600;
    color: #ffffff!important;
    text-decoration: none;
    margin-bottom: 8px;
}
.pkc-nav-home:hover,
.pkc-nav-home--active { color: var(--pkc-accent); }

.pkc-nav-section { margin-bottom: 4px; }

.pkc-nav-section-title {
    display: block;
    padding: 10px 20px 4px;
    font-size: 16px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .07em;
    color: var(--pkc-muted);
}

.pkc-nav-item {
    display: block;
    padding: 0px 20px;
    font-size: 14px;
    color: #ffffff;
    text-decoration: none;
    border-left: 2px solid transparent;
    transition: color .1s, border-color .1s, background .1s;
    line-height: 1.4;
}
#iniactive.pkc-nav-item--active{
    color: var(--pkc-text)!important;
}
.pkc-nav-item:hover { color: #ddb115!important; }
.pkc-nav-item--active {
    color: black!important;
    border-left-color: var(--pkc-accent);
    font-weight: 600;
    background: var(--pkc-accent-bg);
}
.pkc-nav-item--active:hover { background: var(--pkc-accent-bg); color: var(--pkc-accent)!important; }
.pkc-nav-item:active { background: var(--pkc-accent-bg); color: #083918!important; }
.pkc-nav-dot { margin-right: 4px; }

.pkc-nav-sub-section { padding-left: 12px; }
.pkc-nav-sub-title {
    display: block;
    padding: 15px 10px 2px;
    font-size: 14px;
    font-weight: 600;
    color: var(--pkc-muted);
    text-transform: uppercase;
    letter-spacing: .05em;
}
.pkc-nav-item--sub { padding-left: 10px; font-size: 14px; color:#ffffff!important; }
.pkc-nav-empty { padding: 8px 20px; color: var(--pkc-muted); font-size: 12px; }

/* ── MAIN CONTENT ────────────────────────────────────────── */
.pkc-main {
    flex: 1;
    min-width: 0;
    padding: 36px 48px 80px;
    max-width: 860px;
}

/* Mobile topbar */
.pkc-mobile-topbar { display: none; }
.pkc-hamburger {
    background: none; border: none; font-size: 18px;
    cursor: pointer; padding: 0; margin-right: 8px; color: var(--pkc-text);
}
.pkc-breadcrumb { font-size: 13px; color: var(--pkc-muted); }
.pkc-breadcrumb a { color: var(--pkc-accent); text-decoration: none; }
.pkc-breadcrumb-sep { margin: 0 6px; }

/* Home page */
.pkc-home-title { font-size: 28px; font-weight: 700; margin-bottom: 8px; }
.pkc-home-lead  { color: var(--pkc-muted); font-size: 15px; margin-bottom: 32px; }
.pkc-section-heading { font-size: 16px; font-weight: 700; margin: 40px 0 16px; border-top: 1px solid var(--pkc-border); padding-top: 24px; }

/* Category Cards Grid */
.pkc-cat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 16px;
}
.pkc-cat-card {
    display: block;
    text-decoration: none;
    border: 1px solid var(--pkc-border);
    border-radius: var(--pkc-radius);
    padding: 20px;
    color: var(--pkc-text);
    transition: border-color .15s, box-shadow .15s, transform .15s;
}
.pkc-cat-card-inner { text-align: center; }
.pkc-cat-card:hover {
    border-color: var(--pkc-accent);
    box-shadow: 0 4px 16px rgba(0,112,243,.1);
    transform: translateY(-2px);
}

.pkc-cat-card h3 { font-size: 14px; font-weight: 700; margin-bottom: 6px; }
.pkc-cat-card p { font-size: 12px; color: var(--pkc-muted); margin-bottom: 8px; line-height: 1.5; }
.pkc-cat-count { font-size: 11px; color: var(--pkc-accent); font-weight: 600; }

/* Recent list */
.pkc-recent-list { display: flex; flex-direction: column; gap: 1px; }
.pkc-recent-item {
    display: block;
    text-decoration: none;
    padding: 14px 0;
    border-bottom: 1px solid var(--pkc-border);
    color: var(--pkc-text);
    transition: color .1s;
}
.pkc-recent-item:hover .pkc-recent-title { color: var(--pkc-accent); }
.pkc-recent-title { font-size: 14px; font-weight: 600; margin-bottom: 4px; }
.pkc-recent-cats  { margin-bottom: 4px; }
.pkc-recent-exc   { font-size: 12px; color: var(--pkc-text); }

/* Badge */
.pkc-cat-badge {
    display: inline-block;
    background: var(--pkc-accent-bg);
    color: var(--pkc-accent);
    padding: 1px 8px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    text-decoration: none;
    margin-right: 4px;
}
a.pkc-cat-badge:hover { background: #f2ebd7; }

/* Empty state */
.pkc-empty-state { text-align: center; padding: 60px 20px; color: var(--pkc-muted); }
.pkc-empty-icon { font-size: 36px; margin-bottom: 12px; }
.pkc-empty-state h3 { color: var(--pkc-text); font-size: 16px; margin-bottom: 6px; }
.pkc-empty-state p { font-size: 13px; }

/* Article */
.pkc-article-cats { margin-bottom: 12px; }
.pkc-article-h1   { font-size: 26px; font-weight: 700; margin-bottom: 12px; line-height: 1.3; }
.pkc-article-lead { font-size: 15px; color: #374151; margin-bottom: 24px; line-height: 1.6; }

.pkc-article-body { font-size: 14px; line-height: 1.75; color: #374151; }
.pkc-article-body h2 { font-size: 18px; font-weight: 700; margin: 36px 0 12px; padding-top: 20px; border-top: 1px solid var(--pkc-border); color: var(--pkc-text); }
.pkc-article-body h3 { font-size: 15px; font-weight: 700; margin: 24px 0 8px; color: var(--pkc-text); }
.pkc-article-body p  { margin-bottom: 14px; }
.pkc-article-body ul,
.pkc-article-body ol { padding-left: 20px; margin-bottom: 14px; }
.pkc-article-body li { margin-bottom: 6px; }
.pkc-article-body a  { color: var(--pkc-accent); }
.pkc-article-body img { max-width: 100%; border-radius: var(--pkc-radius); margin: 12px 0; }
.pkc-article-body code { background: #f3f4f6; padding: 2px 6px; border-radius: 4px; font-size: 13px; font-family: 'SFMono-Regular', Consolas, monospace; }
.pkc-article-body pre { background: #1e293b; color: #e2e8f0; padding: 16px; border-radius: var(--pkc-radius); overflow-x: auto; margin-bottom: 16px; }
.pkc-article-body pre code { background: none; color: inherit; padding: 0; }
.pkc-article-body blockquote { border-left: 3px solid var(--pkc-accent); padding-left: 16px; color: var(--pkc-muted); margin: 16px 0; }

.pkc-article-footer { margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--pkc-border); }
.pkc-back-link { font-size: 13px; color: var(--pkc-accent); text-decoration: none; }
.pkc-back-link:hover { text-decoration: underline; }

/* ── RIGHT TOC ───────────────────────────────────────────── */
.pkc-toc {
    width: var(--pkc-toc-w);
    flex-shrink: 0;
    padding: 36px 16px 36px 8px;
    position: sticky;
    top: 53px;
    height: calc(100vh - 53px);
    overflow-y: auto;
    scrollbar-width: thin;
}

.pkc-toc-inner { padding-top: 4px; }
.pkc-toc-title { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .07em; color: var(--pkc-muted); margin-bottom: 10px; }
.pkc-toc-list { list-style: none; }
.pkc-toc-item { margin-bottom: 2px; }
.pkc-toc-level-3 { padding-left: 10px; }
.pkc-toc-link {
    display: block;
    font-size: 12px;
    color: var(--pkc-text);
    text-decoration: none;
    padding: 3px 0;
    border-left: 2px solid transparent;
    padding-left: 8px;
    transition: color .1s, border-color .1s;
    line-height: 1.4;
}
.pkc-toc-link:hover,
.pkc-toc-link.pkc-toc-active {
    color: var(--pkc-text);
    border-left-color: var(--pkc-accent);
}

/* Mobile overlay */
.pkc-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.35);
    z-index: 90;
}
.pkc-overlay.pkc-overlay--open { display: block; }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 1024px) {
    .pkc-toc { display: none; }
    .pkc-main { max-width: 100%; }
}

@media (max-width: 768px) {
    /* Slide-in sidebar */
    .pkc-sidebar {
        position: fixed;
        top: 0;
        left: -240px;
        width: 240px;
        height: 100vh;
        z-index: 95;
        transition: left .25s ease;
        box-shadow: none;
    }
    .pkc-sidebar.pkc-sidebar--open {
        left: 0;
        box-shadow: 4px 0 20px rgba(0,0,0,.15);
    }
    .pkc-sidebar-close {
        display: block;
        position: absolute;
        top: 12px;
        right: 12px;
        background: none;
        border: none;
        font-size: 16px;
        cursor: pointer;
        color: var(--pkc-muted);
    }
    .pkc-mobile-topbar {
        display: flex;
        align-items: center;
        margin-bottom: 20px;
    }
    .pkc-main { padding: 20px 16px 60px; }
    .pkc-topbar { padding: 10px 12px; }
    .pkc-cat-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 420px) {
    .pkc-cat-grid { grid-template-columns: 1fr; }
    .pkc-home-title { font-size: 22px; }
    .pkc-article-h1 { font-size: 20px; }
}