/* kb-design.css – KB index (Latest Blogs style, HTML unchanged) */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Inter:wght@400;500;600&display=swap');

.vertical_tab_1_area {
    background-color: #f8fafc;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    padding: 56px 0 120px;
    position: relative;
    overflow: hidden;
}

.vertical_tab_1_area::before {
    content: '';
    position: absolute;
    top: -10%;
    left: -10%;
    width: 50%;
    height: 50%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, rgba(255, 255, 255, 0) 70%);
    z-index: 0;
    pointer-events: none;
}

.vertical_tab_1_area::after {
    content: '';
    position: absolute;
    top: 20%;
    right: -10%;
    width: 40%;
    height: 60%;
    background: radial-gradient(circle, rgba(239, 68, 68, 0.05) 0%, rgba(255, 255, 255, 0) 70%);
    z-index: 0;
    pointer-events: none;
}

.vertical_tab_1_area > .container {
    position: relative;
    z-index: 1;
    max-width: 1180px;
}

/* ── Header (blog-header style) ── */
.vertical_tab_1_area .bg-store {
    background: transparent;
    padding: 24px 20px 0;
    margin-bottom: 0;
}

.vertical_tab_1_area .bg-store h1 {
    font-family: 'Outfit', sans-serif;
    font-size: 3.5rem;
    font-weight: 800;
    text-align: center;
    margin: 0 0 15px;
    letter-spacing: -0.03em;
    line-height: 1.1;
    background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent !important;
    text-shadow: none;
}

.vertical_tab_1_area .bg-store h1::after {
    display: block;
    content: 'Step-by-step technical guides for Exchange Online, PowerShell, and WholeClear products.';
    font-family: 'Inter', sans-serif;
    font-size: 1.25rem;
    font-weight: 400;
    color: #64748b;
    -webkit-text-fill-color: #64748b;
    background: none;
    margin-top: 15px;
    line-height: 1.6;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
}

.vertical_tab_1_area .content-wrapper {
    padding-top: 50px;
}

.vertical_tab_1_area .tabs_area .row {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 28px;
    margin: 0;
}

.vertical_tab_1_area .col-md-9 {
    flex: 1 1 0;
    min-width: 0;
    width: auto;
    max-width: none;
    padding: 0;
    float: none;
}

/* Sidebar banner – keep visible */
.vertical_tab_1_area .col-md-3 {
    flex: 0 0 260px;
    max-width: 260px;
    padding: 0;
    float: none;
    display: block;
}

.vertical_tab_1_area .col-md-3 img.img-responsive {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
    border: 1px solid #e8edf3;
    position: sticky;
    top: 100px;
}

.vertical_tab_1_area .tab-pane:not(.active) {
    display: none;
}

.vertical_tab_1_area .tab-pane.padding-top {
    padding-top: 0 !important;
}

/* ── Blog grid ── */
.vertical_tab_1_area .article_link ul.list_bullet_plane {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.vertical_tab_1_area .article_link ul.list_bullet_plane li {
    margin: 0;
    padding: 0;
    line-height: normal;
    cursor: default;
    position: relative;
    background: #ffffff;
    border: 1px solid #f1f5f9;
    border-radius: 16px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.02), 0 2px 4px -2px rgba(0, 0, 0, 0.02);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    overflow: hidden;
}

.vertical_tab_1_area .article_link ul.list_bullet_plane li::before {
    display: none;
}

.vertical_tab_1_area .article_link ul.list_bullet_plane li a {
    display: flex;
    flex-direction: column;
    min-height: 100%;
    padding: 24px;
    font-family: 'Outfit', sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
    color: #0f172a;
    line-height: 1.4;
    text-decoration: none;
    transition: color 0.3s ease, transform 0.3s ease;
    box-sizing: border-box;
}

/* GUIDE tag */
.vertical_tab_1_area .article_link ul.list_bullet_plane li a::before {
    content: 'GUIDE';
    display: inline-block;
    width: fit-content;
    font-family: 'Outfit', sans-serif;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 700;
    color: #3b82f6;
    background: rgba(59, 130, 246, 0.1);
    padding: 6px 12px;
    border-radius: 6px;
    margin-bottom: 20px;
}

/* Arrow top-right */
.vertical_tab_1_area .article_link ul.list_bullet_plane li::after {
    content: '→';
    position: absolute;
    top: 26px;
    right: 24px;
    font-size: 1.35rem;
    color: #cbd5e1;
    line-height: 1;
    transition: color 0.3s ease, transform 0.3s ease;
    pointer-events: none;
    width: auto;
    height: auto;
    background: none;
    opacity: 1;
}

.vertical_tab_1_area .article_link ul.list_bullet_plane li:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px -5px rgba(15, 23, 42, 0.08), 0 10px 20px -5px rgba(15, 23, 42, 0.04);
    border-color: #e2e8f0;
}

.vertical_tab_1_area .article_link ul.list_bullet_plane li:hover::after {
    color: #3b82f6;
    transform: translate(4px, -4px);
}

.vertical_tab_1_area .article_link ul.list_bullet_plane li a:hover {
    color: #1e3a8a;
    text-decoration: none;
}

/* Top accent line (non-featured cards only) */
.vertical_tab_1_area .article_link ul.list_bullet_plane li:not(:first-child) {
    border-top: 4px solid transparent;
}

.vertical_tab_1_area .article_link ul.list_bullet_plane li:not(:first-child):hover {
    border-top-color: #3b82f6;
}

/* ── Featured first card (full width navy) ── */
.vertical_tab_1_area .article_link ul.list_bullet_plane li:first-child {
    grid-column: 1 / -1;
    background-color: #0f172a !important;
    background-image: linear-gradient(135deg, #0f172a 0%, #1e3a8a 100%) !important;
    border: none !important;
    border-radius: 20px;
    box-shadow: 0 12px 32px -8px rgba(15, 23, 42, 0.25);
}

.vertical_tab_1_area .article_link ul.list_bullet_plane li:first-child:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 44px -8px rgba(15, 23, 42, 0.35);
}

.vertical_tab_1_area .article_link ul.list_bullet_plane li:first-child a {
    color: #ffffff !important;
    font-size: 1.8rem;
    padding: 40px;
    max-width: 720px;
}

.vertical_tab_1_area .article_link ul.list_bullet_plane li:first-child a::before {
    color: #ffffff !important;
    background: rgba(255, 255, 255, 0.15);
}

.vertical_tab_1_area .article_link ul.list_bullet_plane li:first-child a::after {
    content: 'WholeClear Expert\A June 10, 2026';
    white-space: pre;
    display: block;
    margin-top: auto;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    font-family: 'Inter', sans-serif;
    font-size: 0.8rem;
    font-weight: 500;
    color: #cbd5e1 !important;
    line-height: 1.5;
}

.vertical_tab_1_area .article_link ul.list_bullet_plane li:first-child::after {
    top: 40px;
    right: 40px;
    color: rgba(255, 255, 255, 0.5);
    font-size: 1.5rem;
}

.vertical_tab_1_area .article_link ul.list_bullet_plane li:first-child:hover::after {
    color: #ffffff;
}

.vertical_tab_1_area .article_link ul.list_bullet_plane li:first-child:hover a {
    color: #93c5fd !important;
}

/* Second card – clear white box, dark text */
.vertical_tab_1_area .article_link ul.list_bullet_plane li:nth-child(2) {
    background-color: #ffffff !important;
    background-image: none !important;
}

.vertical_tab_1_area .article_link ul.list_bullet_plane li:nth-child(2) a {
    color: #0f172a !important;
}

.vertical_tab_1_area .article_link ul.list_bullet_plane li:nth-child(2) a::before {
    color: #3b82f6 !important;
    background: rgba(59, 130, 246, 0.1);
}

.vertical_tab_1_area .article_link ul.list_bullet_plane li:nth-child(2):hover a {
    color: #1e3a8a !important;
}

/* ── Responsive ── */
@media (max-width: 992px) {
    .vertical_tab_1_area .col-md-9,
    .vertical_tab_1_area .col-md-3 {
        flex: 0 0 100%;
        max-width: 100%;
    }

    .vertical_tab_1_area .col-md-3 img.img-responsive {
        position: static;
        max-width: 300px;
        margin: 0 auto;
        display: block;
    }
}

@media (max-width: 768px) {
    .vertical_tab_1_area .bg-store h1 {
        font-size: 2.5rem;
    }

    .vertical_tab_1_area .bg-store h1::after {
        font-size: 1.05rem;
        padding: 0 10px;
    }

    .vertical_tab_1_area .article_link ul.list_bullet_plane li:first-child a {
        font-size: 1.35rem;
        padding: 28px;
    }

    .vertical_tab_1_area .article_link ul.list_bullet_plane li:first-child::after {
        top: 28px;
        right: 28px;
    }

    .vertical_tab_1_area .article_link ul.list_bullet_plane {
        grid-template-columns: 1fr;
    }
}