.bkbg-cfc-app {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    -webkit-font-smoothing: antialiased;
}

/* Card */
.bkbg-cfc-card {
    margin: 0 auto;
    padding: 40px;
    box-shadow: 0 4px 32px rgba(0,0,0,0.10);
}

/* Title & subtitle */
.bkbg-cfc-title {
    font-family: var(--bkbg-cfc-tt-font-family, inherit);
    font-size: var(--bkbg-cfc-tt-font-size-d, 28px);
    font-weight: var(--bkbg-cfc-tt-font-weight, 800);
    line-height: var(--bkbg-cfc-tt-line-height-d, 1.2);
    text-transform: var(--bkbg-cfc-tt-text-transform, none);
    font-style: var(--bkbg-cfc-tt-font-style, normal);
    text-decoration: var(--bkbg-cfc-tt-text-decoration, none);
    letter-spacing: var(--bkbg-cfc-tt-letter-spacing-d, normal);
    word-spacing: var(--bkbg-cfc-tt-word-spacing-d, normal);
    text-align: center;
    margin-bottom: 6px;
}
.bkbg-cfc-subtitle {
    font-family: var(--bkbg-cfc-ts-font-family, inherit);
    font-size: var(--bkbg-cfc-ts-font-size-d, 15px);
    font-weight: var(--bkbg-cfc-ts-font-weight, inherit);
    line-height: var(--bkbg-cfc-ts-line-height-d, 1.5);
    text-transform: var(--bkbg-cfc-ts-text-transform, none);
    font-style: var(--bkbg-cfc-ts-font-style, normal);
    text-decoration: var(--bkbg-cfc-ts-text-decoration, none);
    letter-spacing: var(--bkbg-cfc-ts-letter-spacing-d, normal);
    word-spacing: var(--bkbg-cfc-ts-word-spacing-d, normal);
    text-align: center;
    color: #6b7280;
    margin-bottom: 32px;
}

/* Category grid */
.bkbg-cfc-cat-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 32px;
}
@media (max-width: 600px) {
    .bkbg-cfc-cat-grid { grid-template-columns: 1fr; }
}

/* Category panel */
.bkbg-cfc-panel {
    border-radius: 12px;
    padding: 20px;
}
.bkbg-cfc-panel-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}
.bkbg-cfc-panel-icon { font-size: 24px; }
.bkbg-cfc-panel-title {
    font-size: 16px;
    font-weight: 700;
}

/* Label */
.bkbg-cfc-lbl {
    display: block;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* Input */
.bkbg-cfc-input {
    width: 100%;
    padding: 8px 12px;
    border: 1.5px solid #d1d5db;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    background: #ffffff;
    color: #111827;
    box-sizing: border-box;
    margin-bottom: 12px;
    -webkit-appearance: none;
    appearance: none;
    outline: none;
    transition: border-color 0.15s;
}
.bkbg-cfc-input:focus { border-color: #6b7280; }

/* Select */
.bkbg-cfc-select {
    width: 100%;
    padding: 8px 12px;
    border: 1.5px solid #d1d5db;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    background: #fff;
    color: #111827;
    box-sizing: border-box;
    margin-bottom: 12px;
    cursor: pointer;
    outline: none;
}

/* Calculate button */
.bkbg-cfc-calc-btn {
    width: 100%;
    padding: 14px;
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    margin-bottom: 28px;
    transition: opacity 0.2s, transform 0.1s;
}
.bkbg-cfc-calc-btn:hover { opacity: 0.88; transform: translateY(-1px); }
.bkbg-cfc-calc-btn:active { transform: translateY(0); }

/* Result box */
.bkbg-cfc-result {
    border-radius: 16px;
    padding: 28px 24px 20px;
    text-align: center;
    margin-bottom: 24px;
}
.bkbg-cfc-result-label {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 4px;
}
.bkbg-cfc-result-val {
    font-size: 52px;
    font-weight: 900;
    line-height: 1;
    margin-bottom: 6px;
}
.bkbg-cfc-result-sub { font-size: 13px; opacity: 0.72; }
.bkbg-cfc-result-badge {
    display: inline-block;
    padding: 4px 16px;
    border-radius: 99px;
    font-size: 13px;
    font-weight: 700;
    margin-top: 10px;
    color: #fff;
}

/* Breakdown bars */
.bkbg-cfc-breakdown { margin-bottom: 24px; }
.bkbg-cfc-breakdown-title {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 12px;
    color: #374151;
}
.bkbg-cfc-cat-bar-row { margin-bottom: 12px; }
.bkbg-cfc-cat-bar-header {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 4px;
}
.bkbg-cfc-cat-bar-track {
    height: 10px;
    background: #e5e7eb;
    border-radius: 99px;
    overflow: hidden;
}
.bkbg-cfc-cat-bar-fill {
    height: 100%;
    border-radius: 99px;
    transition: width 0.5s cubic-bezier(0.4,0,0.2,1);
}

/* Comparison card */
.bkbg-cfc-comparison {
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 24px;
    background: #f9fafb;
    border: 1.5px solid #e5e7eb;
}
.bkbg-cfc-comparison-title {
    font-size: 14px;
    font-weight: 700;
    color: #374151;
    margin-bottom: 12px;
}
.bkbg-cfc-cmp-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    margin-bottom: 8px;
}
.bkbg-cfc-cmp-row:last-child { margin-bottom: 0; }
.bkbg-cfc-cmp-val { font-weight: 700; }

/* Tips */
.bkbg-cfc-tips { border-radius: 12px; padding: 20px; }
.bkbg-cfc-tips-title {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 10px;
}
.bkbg-cfc-tip {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 13px;
    margin-bottom: 8px;
    color: #374151;
}
.bkbg-cfc-tip-icon { font-size: 16px; flex-shrink: 0; margin-top: 1px; }

/* Unit toggle */
.bkbg-cfc-unit-toggle {
    display: flex;
    margin-bottom: 24px;
    border-radius: 10px;
    overflow: hidden;
    border: 1.5px solid #e5e7eb;
}
.bkbg-cfc-unit-btn {
    flex: 1;
    padding: 9px;
    font-size: 13px;
    font-weight: 600;
    border: none;
    background: transparent;
    color: #6b7280;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
}

/* ── Responsive Typography ──────────────────────────────────────────────── */
@media (max-width: 1024px) {
    .bkbg-cfc-title {
        font-size: var(--bkbg-cfc-tt-font-size-t, var(--bkbg-cfc-tt-font-size-d, 28px));
        line-height: var(--bkbg-cfc-tt-line-height-t, var(--bkbg-cfc-tt-line-height-d, 1.2));
        letter-spacing: var(--bkbg-cfc-tt-letter-spacing-t, var(--bkbg-cfc-tt-letter-spacing-d, normal));
        word-spacing: var(--bkbg-cfc-tt-word-spacing-t, var(--bkbg-cfc-tt-word-spacing-d, normal));
    }
    .bkbg-cfc-subtitle {
        font-size: var(--bkbg-cfc-ts-font-size-t, var(--bkbg-cfc-ts-font-size-d, 15px));
        line-height: var(--bkbg-cfc-ts-line-height-t, var(--bkbg-cfc-ts-line-height-d, 1.5));
        letter-spacing: var(--bkbg-cfc-ts-letter-spacing-t, var(--bkbg-cfc-ts-letter-spacing-d, normal));
        word-spacing: var(--bkbg-cfc-ts-word-spacing-t, var(--bkbg-cfc-ts-word-spacing-d, normal));
    }
}

@media (max-width: 767px) {
    .bkbg-cfc-title {
        font-size: var(--bkbg-cfc-tt-font-size-m, var(--bkbg-cfc-tt-font-size-t, var(--bkbg-cfc-tt-font-size-d, 28px)));
        line-height: var(--bkbg-cfc-tt-line-height-m, var(--bkbg-cfc-tt-line-height-t, var(--bkbg-cfc-tt-line-height-d, 1.2)));
        letter-spacing: var(--bkbg-cfc-tt-letter-spacing-m, var(--bkbg-cfc-tt-letter-spacing-t, var(--bkbg-cfc-tt-letter-spacing-d, normal)));
        word-spacing: var(--bkbg-cfc-tt-word-spacing-m, var(--bkbg-cfc-tt-word-spacing-t, var(--bkbg-cfc-tt-word-spacing-d, normal)));
    }
    .bkbg-cfc-subtitle {
        font-size: var(--bkbg-cfc-ts-font-size-m, var(--bkbg-cfc-ts-font-size-t, var(--bkbg-cfc-ts-font-size-d, 15px)));
        line-height: var(--bkbg-cfc-ts-line-height-m, var(--bkbg-cfc-ts-line-height-t, var(--bkbg-cfc-ts-line-height-d, 1.5)));
        letter-spacing: var(--bkbg-cfc-ts-letter-spacing-m, var(--bkbg-cfc-ts-letter-spacing-t, var(--bkbg-cfc-ts-letter-spacing-d, normal)));
        word-spacing: var(--bkbg-cfc-ts-word-spacing-m, var(--bkbg-cfc-ts-word-spacing-t, var(--bkbg-cfc-ts-word-spacing-d, normal)));
    }
}