/* Study Notes Block */
.bkbg-sn-block {
    box-sizing: border-box;
    font-family: inherit;
    overflow: hidden;
}

/* Header */
.bkbg-sn-header {
    padding: 16px 20px;
}

.bkbg-sn-subject-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    background: rgba(255,255,255,.2);
    color: inherit;
    margin-left: 10px;
    vertical-align: middle;
}

.bkbg-sn-meta {
    display: flex;
    gap: 16px;
    margin-top: 6px;
    font-size: 13px;
    opacity: .8;
    flex-wrap: wrap;
}

.bkbg-sn-block h3.bkbg-sn-topic,
.bkbg-sn-editor-wrap h3.bkbg-sn-topic {
    margin: 0;
    display: inline;
    font-family:       var(--bksn-tt-font-family, inherit);
    font-size:         var(--bksn-tt-font-size-d, 20px);
    line-height:       var(--bksn-tt-line-height-d, 1.3);
    letter-spacing:    var(--bksn-tt-letter-spacing-d, normal);
    word-spacing:      var(--bksn-tt-word-spacing-d, normal);
    font-weight:       var(--bksn-tt-font-weight, 700);
    font-style:        var(--bksn-tt-font-style, normal);
    text-decoration:   var(--bksn-tt-text-decoration, none);
    text-transform:    var(--bksn-tt-text-transform, none);
}

/* Column stripe */
.bkbg-sn-col-stripe {
    display: flex;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: #fff;
}

.bkbg-sn-col-stripe-cue {
    padding: 6px 14px;
    border-right: 1px solid rgba(255,255,255,.3);
}

.bkbg-sn-col-stripe-notes {
    flex: 1;
    padding: 6px 14px;
}

/* Notes grid — Cornell layout */
.bkbg-sn-notes {
    border-top: none;
}

.bkbg-sn-row {
    display: flex;
    border-bottom: 1px solid var(--bkbg-sn-row-border, #e5e7eb);
}

.bkbg-sn-row:last-child {
    border-bottom: none;
}

.bkbg-sn-cue {
    padding: 14px 16px;
    flex-shrink: 0;
    font-weight: 600;
    line-height: 1.55;
    border-right: 1px solid var(--bkbg-sn-cue-border, #e2e8f0);
    font-family:       var(--bksn-tx-font-family, inherit);
    font-size:         var(--bksn-tx-font-size-d, 14px);
    letter-spacing:    var(--bksn-tx-letter-spacing-d, normal);
    word-spacing:      var(--bksn-tx-word-spacing-d, normal);
    font-style:        var(--bksn-tx-font-style, normal);
    text-decoration:   var(--bksn-tx-text-decoration, none);
    text-transform:    var(--bksn-tx-text-transform, none);
}

.bkbg-sn-note-text {
    flex: 1;
    padding: 14px 16px;
    font-family:       var(--bksn-tx-font-family, inherit);
    font-size:         var(--bksn-tx-font-size-d, 14px);
    line-height:       var(--bksn-tx-line-height-d, var(--bkbg-sn-lh, 1.7));
    letter-spacing:    var(--bksn-tx-letter-spacing-d, normal);
    word-spacing:      var(--bksn-tx-word-spacing-d, normal);
    font-weight:       var(--bksn-tx-font-weight, 400);
    font-style:        var(--bksn-tx-font-style, normal);
    text-decoration:   var(--bksn-tx-text-decoration, none);
    text-transform:    var(--bksn-tx-text-transform, none);
}

/* Linear layout */
.bkbg-sn-notes.is-linear .bkbg-sn-row {
    flex-direction: column;
}

.bkbg-sn-notes.is-linear .bkbg-sn-cue {
    border-right: none;
    border-bottom: 1px solid var(--bkbg-sn-cue-border, #e2e8f0);
    padding-bottom: 8px;
    width: 100% !important;
    flex-shrink: unset;
}

.bkbg-sn-notes.is-linear .bkbg-sn-note-text {
    padding-top: 10px;
}

/* Cards layout */
.bkbg-sn-notes.is-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 12px;
    padding: 14px;
    background: transparent;
    border: none;
}

.bkbg-sn-notes.is-cards .bkbg-sn-row {
    flex-direction: column;
    border: 1px solid var(--bkbg-sn-row-border, #e5e7eb);
    border-radius: 8px;
    overflow: hidden;
    border-bottom: none;
}

.bkbg-sn-notes.is-cards .bkbg-sn-cue {
    border-right: none;
    border-bottom: 1px solid var(--bkbg-sn-cue-border, #e2e8f0);
    width: 100% !important;
    flex-shrink: unset;
}

/* Summary */
.bkbg-sn-summary-section {
    margin-top: 14px;
    padding: 14px 16px;
    border-radius: 8px;
    border: 1px solid;
}

.bkbg-sn-section-label {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 8px;
    display: block;
}

.bkbg-sn-summary-text {
    margin: 0;
    line-height: var(--bkbg-sn-lh, 1.7);
}

/* Key Terms */
.bkbg-sn-terms-section {
    margin-top: 12px;
    padding: 14px 16px;
    border-radius: 8px;
    border: 1px solid;
}

.bkbg-sn-terms-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.bkbg-sn-term-item {
    display: flex;
    gap: 10px;
    align-items: baseline;
    padding: 6px 0;
    border-bottom: 1px solid rgba(0,0,0,.06);
    line-height: 1.5;
}

.bkbg-sn-term-item:last-child {
    border-bottom: none;
}

.bkbg-sn-term-word {
    font-weight: 700;
    flex-shrink: 0;
    min-width: 130px;
}

/* Tags */
.bkbg-sn-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-top: 12px;
}

.bkbg-sn-tag {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
}

/* ── Responsive typography ─────────────────────────────── */
@media (max-width: 1024px) {
    .bkbg-sn-block h3.bkbg-sn-topic,
    .bkbg-sn-editor-wrap h3.bkbg-sn-topic {
        font-size:      var(--bksn-tt-font-size-t, var(--bksn-tt-font-size-d, 20px));
        line-height:    var(--bksn-tt-line-height-t, var(--bksn-tt-line-height-d, 1.3));
        letter-spacing: var(--bksn-tt-letter-spacing-t, var(--bksn-tt-letter-spacing-d, normal));
        word-spacing:   var(--bksn-tt-word-spacing-t, var(--bksn-tt-word-spacing-d, normal));
    }
    .bkbg-sn-note-text {
        font-size:      var(--bksn-tx-font-size-t, var(--bksn-tx-font-size-d, 14px));
        line-height:    var(--bksn-tx-line-height-t, var(--bksn-tx-line-height-d, 1.7));
        letter-spacing: var(--bksn-tx-letter-spacing-t, var(--bksn-tx-letter-spacing-d, normal));
        word-spacing:   var(--bksn-tx-word-spacing-t, var(--bksn-tx-word-spacing-d, normal));
    }
    .bkbg-sn-cue {
        font-size:      var(--bksn-tx-font-size-t, var(--bksn-tx-font-size-d, 14px));
        letter-spacing: var(--bksn-tx-letter-spacing-t, var(--bksn-tx-letter-spacing-d, normal));
        word-spacing:   var(--bksn-tx-word-spacing-t, var(--bksn-tx-word-spacing-d, normal));
            line-height: var(--bksn-tx-line-height-t, var(--bksn-tx-line-height-d, var(--bkbg-sn-lh, 1.7)));
    }
}

@media (max-width: 767px) {
    .bkbg-sn-block h3.bkbg-sn-topic,
    .bkbg-sn-editor-wrap h3.bkbg-sn-topic {
        font-size:      var(--bksn-tt-font-size-m, var(--bksn-tt-font-size-t, var(--bksn-tt-font-size-d, 20px)));
        line-height:    var(--bksn-tt-line-height-m, var(--bksn-tt-line-height-t, var(--bksn-tt-line-height-d, 1.3)));
        letter-spacing: var(--bksn-tt-letter-spacing-m, var(--bksn-tt-letter-spacing-t, var(--bksn-tt-letter-spacing-d, normal)));
        word-spacing:   var(--bksn-tt-word-spacing-m, var(--bksn-tt-word-spacing-t, var(--bksn-tt-word-spacing-d, normal)));
    }
    .bkbg-sn-note-text {
        font-size:      var(--bksn-tx-font-size-m, var(--bksn-tx-font-size-t, var(--bksn-tx-font-size-d, 14px)));
        line-height:    var(--bksn-tx-line-height-m, var(--bksn-tx-line-height-t, var(--bksn-tx-line-height-d, 1.7)));
        letter-spacing: var(--bksn-tx-letter-spacing-m, var(--bksn-tx-letter-spacing-t, var(--bksn-tx-letter-spacing-d, normal)));
        word-spacing:   var(--bksn-tx-word-spacing-m, var(--bksn-tx-word-spacing-t, var(--bksn-tx-word-spacing-d, normal)));
    }
    .bkbg-sn-cue {
        font-size:      var(--bksn-tx-font-size-m, var(--bksn-tx-font-size-t, var(--bksn-tx-font-size-d, 14px)));
        letter-spacing: var(--bksn-tx-letter-spacing-m, var(--bksn-tx-letter-spacing-t, var(--bksn-tx-letter-spacing-d, normal)));
        word-spacing:   var(--bksn-tx-word-spacing-m, var(--bksn-tx-word-spacing-t, var(--bksn-tx-word-spacing-d, normal)));
            line-height: var(--bksn-tx-line-height-m, var(--bksn-tx-line-height-t, var(--bksn-tx-line-height-d, var(--bkbg-sn-lh, 1.7))));
    }
}

@media (max-width: 640px) {
    .bkbg-sn-row {
        flex-direction: column;
    }

    .bkbg-sn-cue {
        border-right: none;
        border-bottom: 1px solid var(--bkbg-sn-cue-border, #e2e8f0);
        width: 100% !important;
        flex-shrink: unset;
    }

    .bkbg-sn-term-word {
        min-width: 100px;
    }
}