/* Split Bill Calculator — bkbg-sbc-* */
.bkbg-sbc-app {
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}
.bkbg-sbc-app *,
.bkbg-sbc-app *::before,
.bkbg-sbc-app *::after {
    box-sizing: border-box;
}

.bkbg-sbc-wrap {
    max-width: 500px;
    margin: 0 auto;
    background: #fff;
    border-radius: 16px;
    padding: 36px 32px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.09);
}

.bkbg-sbc-header {
    margin-bottom: 22px;
}
.bkbg-sbc-title {
    font-family: var(--bksbc-tt-font-family, inherit);
    font-size: var(--bksbc-tt-font-size-d, 28px);
    font-weight: var(--bksbc-tt-font-weight, 700);
    font-style: var(--bksbc-tt-font-style);
    text-decoration: var(--bksbc-tt-text-decoration);
    text-transform: var(--bksbc-tt-text-transform);
    margin: 0 0 6px;
    line-height: var(--bksbc-tt-line-height-d, 1.2);
    letter-spacing: var(--bksbc-tt-letter-spacing-d);
    word-spacing: var(--bksbc-tt-word-spacing-d);
}
.bkbg-sbc-subtitle {
    font-family: var(--bksbc-st-font-family, inherit);
    font-size: var(--bksbc-st-font-size-d, 15px);
    font-weight: var(--bksbc-st-font-weight);
    font-style: var(--bksbc-st-font-style);
    text-decoration: var(--bksbc-st-text-decoration);
    text-transform: var(--bksbc-st-text-transform);
    margin: 0;
    opacity: .7;
    line-height: var(--bksbc-st-line-height-d);
    letter-spacing: var(--bksbc-st-letter-spacing-d);
    word-spacing: var(--bksbc-st-word-spacing-d);
}

/* Inputs */
.bkbg-sbc-field {
    margin-bottom: 16px;
}
.bkbg-sbc-label {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 5px;
}
.bkbg-sbc-label span {
    font-weight: 400;
    font-size: 12px;
    color: #9ca3af;
}
.bkbg-sbc-input {
    width: 100%;
    padding: 11px 14px;
    font-size: 16px;
    font-family: inherit;
    border-radius: 8px;
    border: 1.5px solid #e5e7eb;
    outline: none;
    transition: border-color .15s;
    -webkit-appearance: none;
    appearance: none;
}
.bkbg-sbc-input:focus {
    border-color: #6c3fb5;
    box-shadow: 0 0 0 3px rgba(108,63,181,.12);
}

/* Tip presets row */
.bkbg-sbc-presets {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 10px;
}
.bkbg-sbc-preset-btn {
    flex: 1;
    min-width: 48px;
    padding: 8px 6px;
    border-radius: 8px;
    border: 2px solid #e5e7eb;
    background: #f3f4f6;
    color: #374151;
    font-weight: 700;
    font-size: 14px;
    cursor: pointer;
    font-family: inherit;
    transition: background .15s, border-color .15s, color .15s;
}
.bkbg-sbc-preset-btn:hover {
    border-color: #6c3fb5;
    background: #f5f3ff;
}
.bkbg-sbc-preset-btn.active {
    background: #6c3fb5;
    border-color: #6c3fb5;
    color: #fff;
}
.bkbg-sbc-tip-custom {
    width: 72px;
    padding: 8px 10px;
    border-radius: 8px;
    border: 1.5px solid #e5e7eb;
    font-size: 15px;
    font-family: inherit;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}
.bkbg-sbc-tip-custom:focus {
    border-color: #6c3fb5;
}

/* Result card */
.bkbg-sbc-result {
    background: #6c3fb5;
    border-radius: 8px;
    padding: 24px;
    text-align: center;
    margin-bottom: 16px;
    position: relative;
    overflow: hidden;
}
.bkbg-sbc-result-label {
    font-size: 13px;
    font-weight: 600;
    color: rgba(255,255,255,.8);
    margin-bottom: 6px;
}
.bkbg-sbc-result-amount {
    font-family: var(--bksbc-rs-font-family, inherit);
    font-size: var(--bksbc-rs-font-size-d, 56px);
    font-weight: var(--bksbc-rs-font-weight, 800);
    font-style: var(--bksbc-rs-font-style);
    text-decoration: var(--bksbc-rs-text-decoration);
    text-transform: var(--bksbc-rs-text-transform);
    color: #fff;
    line-height: var(--bksbc-rs-line-height-d, 1);
    letter-spacing: var(--bksbc-rs-letter-spacing-d, -1px);
    word-spacing: var(--bksbc-rs-word-spacing-d);
}

/* Breakdown */
.bkbg-sbc-breakdown {
    background: #f5f3ff;
    border: 1.5px solid #ede9fe;
    border-radius: 8px;
    padding: 16px 20px;
    animation: bkbg-sbc-fade-in .3s ease;
}
.bkbg-sbc-breakdown-row {
    display: flex;
    justify-content: space-between;
    padding: 5px 0;
    font-size: 14px;
    border-bottom: 1px solid #ede9fe;
}
.bkbg-sbc-breakdown-row:last-child {
    border-bottom: none;
    font-weight: 700;
    font-size: 15px;
    padding-top: 10px;
}
.bkbg-sbc-breakdown-row strong {
    font-weight: 600;
}

@keyframes bkbg-sbc-fade-in {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

@media (max-width: 1024px) {
    .bkbg-sbc-title {
        font-size: var(--bksbc-tt-font-size-t, var(--bksbc-tt-font-size-d, 28px));
        line-height: var(--bksbc-tt-line-height-t, var(--bksbc-tt-line-height-d, 1.2));
        letter-spacing: var(--bksbc-tt-letter-spacing-t, var(--bksbc-tt-letter-spacing-d));
        word-spacing: var(--bksbc-tt-word-spacing-t, var(--bksbc-tt-word-spacing-d));
    }
    .bkbg-sbc-subtitle {
        font-size: var(--bksbc-st-font-size-t, var(--bksbc-st-font-size-d, 15px));
        line-height: var(--bksbc-st-line-height-t, var(--bksbc-st-line-height-d));
        letter-spacing: var(--bksbc-st-letter-spacing-t, var(--bksbc-st-letter-spacing-d));
        word-spacing: var(--bksbc-st-word-spacing-t, var(--bksbc-st-word-spacing-d));
    }
    .bkbg-sbc-result-amount {
        font-size: var(--bksbc-rs-font-size-t, var(--bksbc-rs-font-size-d, 56px));
        line-height: var(--bksbc-rs-line-height-t, var(--bksbc-rs-line-height-d, 1));
        letter-spacing: var(--bksbc-rs-letter-spacing-t, var(--bksbc-rs-letter-spacing-d, -1px));
        word-spacing: var(--bksbc-rs-word-spacing-t, var(--bksbc-rs-word-spacing-d));
    }
}
@media (max-width: 767px) {
    .bkbg-sbc-title {
        font-size: var(--bksbc-tt-font-size-m, var(--bksbc-tt-font-size-t, var(--bksbc-tt-font-size-d, 28px)));
        line-height: var(--bksbc-tt-line-height-m, var(--bksbc-tt-line-height-t, var(--bksbc-tt-line-height-d, 1.2)));
        letter-spacing: var(--bksbc-tt-letter-spacing-m, var(--bksbc-tt-letter-spacing-t, var(--bksbc-tt-letter-spacing-d)));
        word-spacing: var(--bksbc-tt-word-spacing-m, var(--bksbc-tt-word-spacing-t, var(--bksbc-tt-word-spacing-d)));
    }
    .bkbg-sbc-subtitle {
        font-size: var(--bksbc-st-font-size-m, var(--bksbc-st-font-size-t, var(--bksbc-st-font-size-d, 15px)));
        line-height: var(--bksbc-st-line-height-m, var(--bksbc-st-line-height-t, var(--bksbc-st-line-height-d)));
        letter-spacing: var(--bksbc-st-letter-spacing-m, var(--bksbc-st-letter-spacing-t, var(--bksbc-st-letter-spacing-d)));
        word-spacing: var(--bksbc-st-word-spacing-m, var(--bksbc-st-word-spacing-t, var(--bksbc-st-word-spacing-d)));
    }
    .bkbg-sbc-result-amount {
        font-size: var(--bksbc-rs-font-size-m, var(--bksbc-rs-font-size-t, var(--bksbc-rs-font-size-d, 56px)));
        line-height: var(--bksbc-rs-line-height-m, var(--bksbc-rs-line-height-t, var(--bksbc-rs-line-height-d, 1)));
        letter-spacing: var(--bksbc-rs-letter-spacing-m, var(--bksbc-rs-letter-spacing-t, var(--bksbc-rs-letter-spacing-d, -1px)));
        word-spacing: var(--bksbc-rs-word-spacing-m, var(--bksbc-rs-word-spacing-t, var(--bksbc-rs-word-spacing-d)));
    }
}