/* ==========================================================================
   Wiki (Knowledge Base) — themed category browser to match the home page
   --------------------------------------------------------------------------
   Centered header (badge + title + subtitle) over a two-column browser:
   a category sidebar that toggles article panels. Tokens (--qr-*) come
   from qubitrp.css.
   ========================================================================== */

.wiki-page {
    background: #0b0f13;
    padding: 56px 0 96px;
    min-height: calc(100vh - 78px);
}

/* ------------------------------------------------------------------- Header */
.wiki-hero {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 48px;
    padding: 0 20px;
}

.wiki-badge {
    display: inline-block;
    padding: 6px 16px;
    margin-bottom: 18px;
    border: 1px solid rgba(43, 189, 246, 0.4);
    border-radius: 999px;
    background: var(--qr-green-soft);
    color: var(--qr-green-bright);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 1.8px;
    text-transform: uppercase;
}

.wiki-hero__title {
    margin: 0 0 14px;
    color: #ffffff;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: clamp(2.4rem, 6vw, 4rem);
    text-shadow: 0 0 26px rgba(43, 189, 246, 0.35);
}

.wiki-hero__subtitle {
    margin: 0;
    color: rgba(233, 246, 255, 0.6);
    font-size: 1.05rem;
    line-height: 1.6;
}

/* ------------------------------------------------------------------ Browser */
.wiki-browser {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 24px;
    align-items: start;
}

/* Shared surface look for the sidebar + content cards */
.wiki-sidebar,
.wiki-content {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.035) 0%, rgba(255, 255, 255, 0.012) 100%);
    border: 1px solid var(--qr-border);
    border-radius: 18px;
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3);
}

/* ------------------------------------------------------------------ Sidebar */
.wiki-sidebar {
    padding: 20px 14px;
    position: sticky;
    top: 92px;
}

.wiki-sidebar__heading {
    margin: 4px 8px 14px;
    color: #8b939c;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 1.4px;
    text-transform: uppercase;
}

.wiki-cat-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.wiki-cat {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 11px 12px;
    border: 1px solid transparent;
    border-radius: 10px;
    background: transparent;
    color: #9aa3ad;
    font-size: 0.95rem;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.wiki-cat__icon {
    width: 20px;
    text-align: center;
    color: #6f7883;
    font-size: 0.95rem;
    transition: color 0.2s ease;
}

.wiki-cat__name { flex: 1; }

.wiki-cat__chevron {
    font-size: 0.7rem;
    color: var(--qr-green);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.wiki-cat:hover {
    background: rgba(255, 255, 255, 0.04);
    color: #eaf6ff;
}

.wiki-cat:hover .wiki-cat__icon { color: #aeb6bf; }

.wiki-cat.is-active {
    background: var(--qr-green-soft);
    border-color: rgba(43, 189, 246, 0.35);
    color: var(--qr-green-bright);
    font-weight: 600;
}

.wiki-cat.is-active .wiki-cat__icon { color: var(--qr-green); }
.wiki-cat.is-active .wiki-cat__chevron { opacity: 1; }

/* ------------------------------------------------------------------ Panels */
.wiki-content {
    padding: 28px 28px 30px;
    min-height: 280px;
}

.wiki-panel { display: none; }
.wiki-panel.is-active { display: block; animation: wikiFade 0.3s ease-out; }

@keyframes wikiFade {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

.wiki-panel__head {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.wiki-panel__icon {
    width: 52px;
    height: 52px;
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: var(--qr-green-soft);
    color: var(--qr-green);
    font-size: 1.35rem;
}

.wiki-panel__title {
    margin: 0;
    color: #ffffff;
    font-size: 1.5rem;
    font-weight: 700;
}

.wiki-panel__desc {
    margin: 4px 0 0;
    color: rgba(233, 246, 255, 0.55);
    font-size: 0.92rem;
}

/* ----------------------------------------------------------- Article rows */
.wiki-articles {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.wiki-article {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 15px 18px;
    border: 1px solid var(--qr-border);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.025);
    color: #d7dee6;
    text-decoration: none;
    transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.wiki-article__dot {
    width: 8px;
    height: 8px;
    flex-shrink: 0;
    border-radius: 50%;
    background: var(--qr-green);
    box-shadow: 0 0 8px rgba(43, 189, 246, 0.6);
}

.wiki-article__title { flex: 1; font-size: 0.98rem; }

.wiki-article__chevron {
    font-size: 0.75rem;
    color: #5b636c;
    transition: color 0.2s ease, transform 0.2s ease;
}

.wiki-article:hover {
    background: var(--qr-green-soft);
    border-color: rgba(43, 189, 246, 0.35);
    color: #ffffff;
    transform: translateX(3px);
}

.wiki-article:hover .wiki-article__chevron {
    color: var(--qr-green-bright);
    transform: translateX(2px);
}

.wiki-panel__empty {
    color: rgba(233, 246, 255, 0.5);
    font-size: 0.95rem;
    padding: 10px 2px;
}

/* ------------------------------------------------------------- Empty state */
.wiki-empty {
    text-align: center;
    max-width: 560px;
    margin: 0 auto;
    padding: 64px 32px;
    border: 1px solid var(--qr-border);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.02);
}

.wiki-empty i { font-size: 3rem; color: #4b535b; margin-bottom: 20px; }
.wiki-empty h2 { color: #ffffff; margin-bottom: 10px; }
.wiki-empty p { color: rgba(233, 246, 255, 0.55); margin: 0; }

/* ------------------------------------------------------------------ Mobile */
@media (max-width: 767.98px) {
    .wiki-browser { grid-template-columns: 1fr; }
    .wiki-sidebar { position: static; }
    .wiki-cat-list {
        flex-direction: row;
        flex-wrap: wrap;
    }
    .wiki-cat { width: auto; flex: 1 1 45%; }
    .wiki-content { padding: 22px 18px; }
}