/* ============================================================
   WebFulHost — Knowledge Base / Help Centre
   Follows the v3.0 design system (tokens from _variables.css).
   ============================================================ */

/* ---- Layout scaffolding ---- */
.kb-main {
    min-height: 60vh;
}

.kb-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 1.25rem;
    padding-right: 1.25rem;
}

/* ---- KB Hero (home) ---- */
.kb-hero {
    padding: 7.5rem 5% 4rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, rgba(90, 79, 243, 0.06) 0%, var(--bg-primary) 100%);
}

.kb-hero .hero-bg-glow { position: absolute; }

.kb-hero h1 {
    font-size: clamp(2.2rem, 5vw, 3.6rem);
    font-weight: 900;
    letter-spacing: -0.04em;
    margin: 1.1rem 0 1.2rem;
    color: var(--text-primary);
    line-height: 1.1;
}

.kb-hero-sub {
    color: var(--text-secondary);
    font-size: 1.08rem;
    line-height: 1.8;
    max-width: 620px;
    margin: 0 auto 2.2rem;
}

/* ---- Search ---- */
.kb-search {
    max-width: 700px;
    margin: 0 auto;
}

.kb-search-form {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-glass-strong);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-pill);
    padding: 0.4rem 0.4rem 0.4rem 1.1rem;
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(12px);
    transition: box-shadow 0.32s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.32s;
}

.kb-search-form:focus-within {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
}

.kb-search-icon {
    color: var(--text-muted);
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.kb-search-form input {
    flex: 1;
    min-width: 0;
    border: none;
    outline: none;
    background: transparent;
    padding: 0.9rem 0.6rem;
    font-size: 1rem;
    color: var(--text-primary);
    font-family: inherit;
}

.kb-search-form input::placeholder {
    color: var(--text-placeholder);
}

.kb-search-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--accent-gradient);
    border: none;
    color: #ffffff;
    font-weight: 700;
    font-size: 0.95rem;
    padding: 0.85rem 1.9rem;
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: background 0.32s, transform 0.32s, box-shadow 0.32s;
    flex-shrink: 0;
}

.kb-search-btn:hover {
    background: var(--accent-gradient-hover);
    transform: translateY(-1px);
    box-shadow: 0 8px 26px rgba(90, 79, 243, 0.4);
}

.kb-popular-terms {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    margin-top: 1.4rem;
}

.kb-chip {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: rgba(90, 79, 243, 0.06);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-pill);
    padding: 0.45rem 0.95rem;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.kb-chip:hover {
    color: #ffffff;
    background: var(--accent-gradient);
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* ---- Sections ---- */
.kb-section {
    padding: 4.5rem 5% 3rem;
}

.kb-section-head {
    text-align: center;
    margin-bottom: 2.75rem;
}

.kb-section-head h2 {
    font-size: clamp(1.8rem, 3.5vw, 2.5rem);
    font-weight: 900;
    letter-spacing: -0.03em;
    margin-bottom: 0.5rem;
}

.kb-section-head p {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ---- Category cards ---- */
.kb-cat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.25rem;
}

.kb-cat-card {
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.6rem 1.5rem;
    transition: all 0.32s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.kb-cat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-gradient);
    opacity: 0;
    transition: opacity 0.32s;
}

.kb-cat-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-accent);
    box-shadow: var(--shadow-card-hover);
}

.kb-cat-card:hover::before { opacity: 1; }

.kb-cat-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(90, 79, 243, 0.14) 0%, rgba(37, 99, 235, 0.1) 100%);
    color: var(--accent-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(90, 79, 243, 0.12);
    font-size: 1.5rem;
}

.kb-cat-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
}

.kb-cat-card p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.7;
    flex: 1;
}

.kb-cat-count {
    font-size: 0.74rem;
    font-weight: 700;
    color: var(--accent-secondary);
    letter-spacing: 0.02em;
}

.kb-cat-more {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-primary);
    transition: gap 0.25s;
}

.kb-cat-card:hover .kb-cat-more { gap: 0.55rem; }

/* ---- Article cards (category + search) ---- */
.kb-article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.1rem;
}

.kb-article-card {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.3rem 1.35rem;
    transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

.kb-article-card:hover {
    border-color: var(--border-accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.kb-article-ic {
    color: var(--accent-primary);
    margin-top: 0.15rem;
    flex-shrink: 0;
}

.kb-article-card h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
    line-height: 1.35;
}

.kb-article-card h3 a { color: inherit; }
.kb-article-card h3 a:hover { color: var(--accent-primary); }

.kb-article-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin: 0;
}

.kb-article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.9rem;
    margin-top: 0.55rem;
    font-size: 0.74rem;
    color: var(--text-muted);
}

.kb-article-meta span {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

/* ---- Single-column article list (category page) ---- */
.kb-article-list {
    max-width: 760px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

/* ---- Category hero ---- */
.kb-cat-hero {
    padding: 6.5rem 5% 2.75rem;
    background: linear-gradient(180deg, rgba(90, 79, 243, 0.06) 0%, var(--bg-primary) 100%);
    position: relative;
    overflow: hidden;
    text-align: center;
}

.kb-cat-hero .kb-breadcrumbs { text-align: left; max-width: 760px; margin: 0 auto 1.5rem; }

.kb-cat-hero h1 {
    font-size: clamp(2rem, 4.5vw, 3.2rem);
    font-weight: 900;
    letter-spacing: -0.035em;
    margin-bottom: 0.9rem;
}

.kb-cat-hero .kb-cat-intro {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.8;
    max-width: 680px;
    margin: 0 auto;
}

/* ---- Breadcrumbs container ---- */
.kb-breadcrumbs { margin-bottom: 1.4rem; }

/* ---- Article page ---- */
.kb-article-wrap {
    max-width: 920px;
    margin: 0 auto;
    padding: 3.25rem 5% 4.5rem;
}

.kb-article-header { margin-bottom: 2rem; }

.kb-article-cat-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.74rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent-primary);
    background: rgba(90, 79, 243, 0.08);
    border: 1px solid rgba(90, 79, 243, 0.18);
    border-radius: var(--radius-pill);
    padding: 0.35rem 1rem;
    margin-bottom: 1.1rem;
}

.kb-article-title {
    font-size: clamp(2rem, 4.5vw, 3.1rem);
    font-weight: 900;
    letter-spacing: -0.035em;
    line-height: 1.12;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.kb-article-lede {
    color: var(--text-secondary);
    font-size: 1.07rem;
    line-height: 1.8;
    max-width: 720px;
}

.kb-article-meta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1.2rem;
    align-items: center;
    margin-top: 1.15rem;
    padding-top: 1.15rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.82rem;
    color: var(--text-muted);
}

.kb-article-meta-row span {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

/* ---- Article body typography ---- */
.kb-article-body { font-size: 0.98rem; }

.kb-article-body h2 {
    font-size: 1.55rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin: 2.6rem 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
    scroll-margin-top: 100px;
}

.kb-article-body h3 {
    font-size: 1.18rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 2rem 0 0.6rem;
    scroll-margin-top: 100px;
}

.kb-article-body p {
    color: var(--text-primary);
    line-height: 1.85;
    margin: 0 0 1.15rem;
}

.kb-article-body ul,
.kb-article-body ol {
    margin: 0 0 1.25rem;
    padding-left: 1.5rem;
}

.kb-article-body li {
    line-height: 1.8;
    margin-bottom: 0.4rem;
    color: var(--text-primary);
}

.kb-article-body li::marker { color: var(--accent-primary); }

.kb-article-body strong { font-weight: 700; }
.kb-article-body em { font-style: italic; }

.kb-article-body a {
    color: var(--accent-primary);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-color: rgba(90, 79, 243, 0.35);
}

.kb-article-body a:hover { color: var(--accent-secondary); }

.kb-article-body img {
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    margin: 1.4rem auto;
    height: auto;
}

.kb-article-body .kb-caption {
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: -1rem;
    margin-bottom: 1.4rem;
}

/* ---- Tables ---- */
.kb-table-wrap {
    overflow-x: auto;
    margin: 1.3rem 0;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-xs);
}

.kb-article-body table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    min-width: 540px;
}

.kb-article-body th,
.kb-article-body td {
    border-bottom: 1px solid var(--border-color);
    padding: 0.7rem 0.9rem;
    text-align: left;
    vertical-align: top;
}

.kb-article-body tr:last-child td { border-bottom: none; }

.kb-article-body th {
    background: rgba(90, 79, 243, 0.06);
    font-weight: 700;
    color: var(--text-primary);
}

.kb-article-body tr:hover td { background: rgba(90, 79, 243, 0.025); }

/* ---- Code ---- */
.kb-article-body code {
    background: rgba(90, 79, 243, 0.08);
    border-radius: 6px;
    padding: 0.15em 0.45em;
    font-size: 0.86em;
    font-family: Consolas, 'Courier New', monospace;
    color: var(--accent-primary);
}

.kb-code-block {
    background: #0f0e1a;
    color: #e3e1ff;
    padding: 1.15rem 1.35rem;
    border-radius: var(--radius-md);
    overflow-x: auto;
    font-family: Consolas, 'Courier New', monospace;
    font-size: 0.86rem;
    line-height: 1.7;
    margin: 1.3rem 0;
    position: relative;
}

.kb-code-block code { background: none; color: inherit; padding: 0; font-size: inherit; }

.kb-copy-btn {
    position: absolute;
    top: 0.6rem;
    right: 0.6rem;
    font-size: 0.72rem;
    font-weight: 700;
    padding: 0.3rem 0.75rem;
    border-radius: var(--radius-pill);
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
    cursor: pointer;
    transition: background 0.2s;
    font-family: inherit;
}

.kb-copy-btn:hover { background: rgba(255, 255, 255, 0.18); }

.kb-article-body kbd {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-bottom-width: 2px;
    border-radius: 6px;
    padding: 0.2em 0.5em;
    font-size: 0.82em;
    font-family: Consolas, 'Courier New', monospace;
    color: var(--text-primary);
}

/* ---- Callout boxes ---- */
.kb-callout {
    display: flex;
    gap: 0.9rem;
    padding: 1.1rem 1.25rem;
    border-radius: var(--radius-md);
    border: 1px solid;
    margin: 1.5rem 0;
    font-size: 0.92rem;
    line-height: 1.75;
}

.kb-callout .kb-callout-ic { flex-shrink: 0; margin-top: 0.2rem; }
.kb-callout strong { font-weight: 700; }

.kb-note { background: var(--info-light); border-color: #b9d9f3; color: #17557f; }
.kb-tip { background: var(--success-light); border-color: #b7e2c6; color: #12613a; }
.kb-warning { background: var(--warning-light); border-color: #f2d39b; color: #7a4a00; }
.kb-danger { background: var(--danger-light); border-color: #f3b8b8; color: #8f1d1d; }

/* ---- In-article FAQ ---- */
.kb-article-faq { margin-top: 2.5rem; }

/* ---- Prev / Next ---- */
.kb-paginate {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 3.25rem;
}

.kb-page-link {
    flex: 1;
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.05rem 1.3rem;
    transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

.kb-page-link:hover {
    border-color: var(--border-accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.kb-page-link small {
    display: block;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.kb-page-link strong { font-size: 0.95rem; color: var(--text-primary); }

.kb-page-link.next { text-align: right; }
.kb-page-link.solo { max-width: 50%; }

/* ---- Related articles ---- */
.kb-related { margin-top: 3.25rem; }

.kb-related h2 {
    font-size: 1.4rem;
    font-weight: 800;
    margin-bottom: 1.2rem;
}

.kb-related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
    gap: 0.9rem;
}

.kb-rel-item {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem 1.1rem;
    transition: all 0.25s;
}

.kb-rel-item:hover {
    border-color: var(--border-accent);
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
}

.kb-rel-item svg { color: var(--accent-primary); margin-top: 0.1rem; flex-shrink: 0; }
.kb-rel-item span { font-size: 0.88rem; font-weight: 600; color: var(--text-primary); line-height: 1.4; }

/* ---- Was this helpful ---- */
.kb-helpful {
    text-align: center;
    margin-top: 3.25rem;
    padding: 2.25rem 1.5rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-xl);
}

.kb-helpful h2 {
    font-size: 1.35rem;
    font-weight: 800;
    margin-bottom: 0.4rem;
}

.kb-helpful p { color: var(--text-secondary); font-size: 0.9rem; }

.kb-helpful-btns {
    display: flex;
    gap: 0.7rem;
    justify-content: center;
    margin-top: 1.1rem;
}

.kb-helpful-btn {
    padding: 0.7rem 1.7rem;
    border-radius: var(--radius-pill);
    border: 1.5px solid var(--border-color);
    background: var(--bg-card);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.25s;
    display: inline-flex;
    gap: 0.45rem;
    align-items: center;
    color: var(--text-primary);
    font-family: inherit;
}

.kb-helpful-btn:hover {
    border-color: var(--border-accent);
    color: var(--accent-primary);
    box-shadow: var(--shadow-sm);
}

.kb-helpful-btn.active {
    background: var(--accent-gradient);
    color: #ffffff;
    border-color: transparent;
}

/* ---- Support CTA ---- */
.kb-cta {
    margin-top: 2.5rem;
    background: linear-gradient(135deg, rgba(90, 79, 243, 0.07) 0%, rgba(37, 99, 235, 0.05) 100%);
    border: 1px solid rgba(90, 79, 243, 0.16);
    border-radius: var(--radius-xl);
    padding: 2.4rem 1.8rem;
    text-align: center;
}

.kb-cta h2 { font-size: 1.55rem; font-weight: 800; }
.kb-cta p { color: var(--text-secondary); max-width: 540px; margin: 0.5rem auto 1.5rem; line-height: 1.75; }

.kb-cta-links {
    display: flex;
    gap: 0.8rem;
    justify-content: center;
    flex-wrap: wrap;
}

.kb-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 1rem 2.2rem;
    border-radius: var(--radius-pill);
    font-weight: 700;
    font-size: 0.95rem;
    transition: all 0.32s cubic-bezier(0.4, 0, 0.2, 1);
    font-family: inherit;
    cursor: pointer;
}

.kb-btn-primary {
    background: var(--accent-gradient);
    color: #ffffff;
    border: none;
    box-shadow: 0 4px 20px rgba(90, 79, 243, 0.35);
}

.kb-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 36px rgba(90, 79, 243, 0.45);
}

.kb-btn-ghost {
    background: transparent;
    color: var(--accent-primary);
    border: 1.5px solid var(--border-accent);
}

.kb-btn-ghost:hover {
    background: var(--accent-primary);
    color: #ffffff;
    border-color: transparent;
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

/* ---- Table of contents ---- */
.kb-toc {
    background: var(--bg-elevated);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    padding: 1.25rem 1.5rem;
    margin: 1.6rem 0 2rem;
}

.kb-toc-title {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 0.8rem;
}

.kb-toc ol {
    list-style: none;
    padding: 0;
    margin: 0;
    counter-reset: kb-toc;
}

.kb-toc li { margin: 0.35rem 0; counter-increment: kb-toc; }

.kb-toc a {
    color: var(--accent-primary);
    font-size: 0.92rem;
    font-weight: 500;
    display: inline-flex;
    gap: 0.55rem;
}

.kb-toc a::before {
    content: counter(kb-toc, decimal-leading-zero);
    font-size: 0.72rem;
    color: var(--text-muted);
    font-weight: 700;
}

.kb-toc a:hover { text-decoration: underline; }

/* ---- Search results ---- */
.kb-search-summary {
    max-width: 780px;
    margin: 0 auto 1.5rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.kb-search-summary strong { color: var(--text-primary); }

.kb-no-results {
    text-align: center;
    padding: 3rem 1rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-xl);
}

.kb-no-results .kb-no-ic {
    display: inline-flex;
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: rgba(90, 79, 243, 0.08);
    color: var(--accent-primary);
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

/* ---- Live filter ---- */
.kb-filter-wrap {
    max-width: 380px;
    margin: 0 auto 2.25rem;
    position: relative;
}

.kb-filter-input {
    width: 100%;
    padding: 0.85rem 1rem 0.85rem 2.6rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-pill);
    background: var(--bg-card);
    font-size: 0.95rem;
    color: var(--text-primary);
    font-family: inherit;
    transition: border-color 0.25s, box-shadow 0.25s;
}

.kb-filter-input:focus {
    outline: none;
    border-color: var(--border-accent);
    box-shadow: var(--shadow-sm);
}

.kb-filter-ic {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

/* ---- Misc ---- */
.kb-note-inline { color: var(--text-muted); }
.kb-visually-authored-safe { display: none; }

/* ---- Responsive ---- */
@media (max-width: 768px) {
    .kb-hero { padding: 6rem 5% 3rem; }
    .kb-section { padding: 3.25rem 5% 2rem; }
    .kb-search-form { padding: 0.3rem; }
    .kb-search-btn { padding: 0.8rem 1.1rem; font-size: 0.85rem; }
    .kb-search-icon { padding-left: 0.5rem; }
    .kb-article-wrap { padding-top: 2.5rem; }
    .kb-paginate { flex-direction: column; }
    .kb-page-link.solo { max-width: 100%; }
}

@media (max-width: 480px) {
    .kb-cat-grid { grid-template-columns: 1fr; }
    .kb-article-grid { grid-template-columns: 1fr; }
    .kb-rel-grid { grid-template-columns: 1fr; }
    .kb-search-btn span { display: none; }
    .kb-search-btn { padding: 0.8rem 1rem; }
}

@media (prefers-reduced-motion: reduce) {
    .kb-cat-card:hover,
    .kb-article-card:hover { transform: none; }
}