/* ============================================================
   Use Case Section — style.css
   Prefix: bkbg-usec-
   ============================================================ */

.bkbg-usec-wrap {
    width: 100%;
    box-sizing: border-box;
    padding: var(--bkbg-usec-pt, 72px) 24px var(--bkbg-usec-pb, 72px);
    background: var(--bkbg-usec-sec-bg, transparent);
}

/* ---- Section header ---- */
.bkbg-usec-header {
    margin-bottom: var(--bkbg-usec-header-gap, 52px);
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.bkbg-usec-header--center { align-items: center; text-align: center; }
.bkbg-usec-header--left   { align-items: flex-start; text-align: left; }

.bkbg-usec-eyebrow {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    background: var(--bkbg-usec-ey-bg, #f0ebff);
    color: var(--bkbg-usec-ey-c, #6c3fb5);
}

.bkbg-usec-section-title {
    margin: 0;
    font-size: clamp(26px, 4vw, 40px);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -.02em;
    color: var(--bkbg-usec-sec-ttl, #0f172a);
}

.bkbg-usec-section-sub {
    margin: 0;
    font-size: 18px;
    line-height: 1.6;
    color: var(--bkbg-usec-sec-sub, #64748b);
    max-width: 600px;
}

/* ---- Cards grid ---- */
.bkbg-usec-grid {
    display: grid;
    grid-template-columns: repeat(var(--bkbg-usec-cols, 3), 1fr);
    gap: var(--bkbg-usec-gap, 24px);
}

/* ---- Card ---- */
.bkbg-usec-card {
    background: var(--bkbg-usec-card-bg, #fff);
    border: 1px solid var(--bkbg-usec-card-bd, #e2e8f0);
    border-radius: var(--bkbg-usec-r, 16px);
    padding: var(--bkbg-usec-p, 32px);
    display: flex;
    flex-direction: column;
    gap: 16px;
    box-sizing: border-box;
    transition: transform .2s, box-shadow .2s;
}
.bkbg-usec-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0,0,0,.08);
}

/* Icon circle */
.bkbg-usec-icon-wrap {
    width:  var(--bkbg-usec-icon-sz, 40px);
    height: var(--bkbg-usec-icon-sz, 40px);
    border-radius: 50%;
    background: color-mix(in srgb, var(--bkbg-usec-accent, #6c3fb5) 12%, transparent);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
/* Fallback for browsers without color-mix */
@supports not (color: color-mix(in srgb, red 10%, blue)) {
    .bkbg-usec-icon-wrap { background: #f0ebff; }
}

.bkbg-usec-icon {
    font-size: calc(var(--bkbg-usec-icon-sz, 40px) * 0.55);
    line-height: 1;
}
.bkbg-usec-icon svg { width: 1em; height: 1em; fill: currentColor; }
.bkbg-usec-icon .dashicons { font-size: inherit; width: 1em; height: 1em; line-height: 1; }
.bkbg-usec-icon .bkbg-icon-img { width: 1em; height: 1em; object-fit: contain; }

.bkbg-usec-title {
    font-family: var(--bkusec-tt-ff, inherit);
    font-size: var(--bkusec-tt-fsd, 20px);
    line-height: var(--bkusec-tt-lhd, 1.3);
    letter-spacing: var(--bkusec-tt-lsd, normal);
    word-spacing: var(--bkusec-tt-wsd, normal);
    font-weight: var(--bkusec-tt-fw, 700);
    font-style: var(--bkusec-tt-fst, normal);
    text-decoration: var(--bkusec-tt-td, none);
    text-transform: var(--bkusec-tt-tt, none);
    color: var(--bkbg-usec-title-c, #0f172a);
}

.bkbg-usec-desc {
    font-family: var(--bkusec-ds-ff, inherit);
    font-size: var(--bkusec-ds-fsd, 14px);
    line-height: var(--bkusec-ds-lhd, 1.65);
    letter-spacing: var(--bkusec-ds-lsd, normal);
    word-spacing: var(--bkusec-ds-wsd, normal);
    font-weight: var(--bkusec-ds-fw, normal);
    font-style: var(--bkusec-ds-fst, normal);
    text-decoration: var(--bkusec-ds-td, none);
    text-transform: var(--bkusec-ds-tt, none);
    color: var(--bkbg-usec-desc-c, #475569);
}

/* Features list */
.bkbg-usec-features {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 7px;
}
.bkbg-usec-features li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-family: var(--bkusec-ds-ff, inherit);
    font-size: var(--bkusec-ds-fsd, 13px);
    color: var(--bkbg-usec-feat-c, #334155);
    line-height: 1.5;
}
.bkbg-usec-check {
    color: var(--bkbg-usec-chk-c, #10b981);
    font-weight: 700;
    flex-shrink: 0;
    line-height: 1.5;
}

/* CTA link */
.bkbg-usec-cta {
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 14px;
    font-weight: 600;
    color: var(--bkbg-usec-accent, #6c3fb5);
    text-decoration: none;
    transition: gap .15s;
}
.bkbg-usec-cta:hover { text-decoration: underline; gap: 8px; }
.bkbg-usec-cta-arrow { transition: transform .15s; }
.bkbg-usec-cta:hover .bkbg-usec-cta-arrow { transform: translateX(3px); }

/* ---- Tabs variant ---- */
.bkbg-usec-tabs-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 28px;
}
.bkbg-usec-tab-btn {
    padding: 8px 20px;
    border-radius: 999px;
    border: 1.5px solid var(--bkbg-usec-card-bd, #e2e8f0);
    background: transparent;
    font-weight: 600;
    font-size: 14px;
    color: var(--bkbg-usec-desc-c, #475569);
    cursor: pointer;
    transition: background .15s, color .15s, border-color .15s;
}
.bkbg-usec-tab-btn.is-active,
.bkbg-usec-tab-btn:hover {
    background: var(--bkbg-usec-accent, #6c3fb5);
    color: #fff;
    border-color: var(--bkbg-usec-accent, #6c3fb5);
}

.bkbg-usec-grid--tabs .bkbg-usec-card {
    display: none;
}
.bkbg-usec-grid--tabs .bkbg-usec-card.is-active {
    display: flex;
    max-width: 600px;
}

/* Responsive */
@media (max-width: 900px) {
    .bkbg-usec-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 1024px) {
    .bkbg-usec-title {
        font-size: var(--bkusec-tt-fst1, var(--bkusec-tt-fsd, 20px));
        line-height: var(--bkusec-tt-lht, var(--bkusec-tt-lhd, 1.3));
        letter-spacing: var(--bkusec-tt-lst, var(--bkusec-tt-lsd, normal));
        word-spacing: var(--bkusec-tt-wst, var(--bkusec-tt-wsd, normal));
    }
    .bkbg-usec-desc,
    .bkbg-usec-features li {
        font-size: var(--bkusec-ds-fst1, var(--bkusec-ds-fsd, 14px));
        line-height: var(--bkusec-ds-lht, var(--bkusec-ds-lhd, 1.65));
        letter-spacing: var(--bkusec-ds-lst, var(--bkusec-ds-lsd, normal));
        word-spacing: var(--bkusec-ds-wst, var(--bkusec-ds-wsd, normal));
    }
}
@media (max-width: 767px) {
    .bkbg-usec-title {
        font-size: var(--bkusec-tt-fsm, var(--bkusec-tt-fst1, var(--bkusec-tt-fsd, 20px)));
        line-height: var(--bkusec-tt-lhm, var(--bkusec-tt-lht, var(--bkusec-tt-lhd, 1.3)));
        letter-spacing: var(--bkusec-tt-lsm, var(--bkusec-tt-lst, var(--bkusec-tt-lsd, normal)));
        word-spacing: var(--bkusec-tt-wsm, var(--bkusec-tt-wst, var(--bkusec-tt-wsd, normal)));
    }
    .bkbg-usec-desc,
    .bkbg-usec-features li {
        font-size: var(--bkusec-ds-fsm, var(--bkusec-ds-fst1, var(--bkusec-ds-fsd, 14px)));
        line-height: var(--bkusec-ds-lhm, var(--bkusec-ds-lht, var(--bkusec-ds-lhd, 1.65)));
        letter-spacing: var(--bkusec-ds-lsm, var(--bkusec-ds-lst, var(--bkusec-ds-lsd, normal)));
        word-spacing: var(--bkusec-ds-wsm, var(--bkusec-ds-wst, var(--bkusec-ds-wsd, normal)));
    }
}
@media (max-width: 560px) {
    .bkbg-usec-grid { grid-template-columns: 1fr; }
    .bkbg-usec-grid--tabs .bkbg-usec-card.is-active { max-width: 100%; }
}