.bkbg-brc-wrap {
    padding: 28px 20px;
    border-radius: 16px;
    font-family: system-ui, -apple-system, sans-serif;
    box-sizing: border-box;
    text-align: center;
}

/* ── Title ─────────────────────────────────────────────── */
.bkbg-brc-title {
  margin: 0 0 4px;
  font-family: var(--bkbg-brc-title-font-family, inherit);
  font-size: var(--bkbg-brc-title-font-size-d, var(--bkbg-brc-title-font-size, 26px));
  font-weight: var(--bkbg-brc-title-font-weight, 800);
  font-style: var(--bkbg-brc-title-font-style, normal);
  text-transform: var(--bkbg-brc-title-text-transform, none);
  text-decoration: var(--bkbg-brc-title-text-decoration, none);
  line-height: var(--bkbg-brc-title-line-height-d, var(--bkbg-brc-title-line-height, 1.2));
  letter-spacing: var(--bkbg-brc-title-letter-spacing-d, var(--bkbg-brc-title-letter-spacing, normal));
  word-spacing: var(--bkbg-brc-title-word-spacing-d, var(--bkbg-brc-title-word-spacing, normal));
}

/* ── Subtitle ──────────────────────────────────────────── */
.bkbg-brc-subtitle {
  margin: 0 0 18px;
  font-family: var(--bkbg-brc-sub-font-family, inherit);
  font-size: var(--bkbg-brc-sub-font-size-d, var(--bkbg-brc-sub-font-size, 14px));
  font-weight: var(--bkbg-brc-sub-font-weight, normal);
  font-style: var(--bkbg-brc-sub-font-style, normal);
  text-transform: var(--bkbg-brc-sub-text-transform, none);
  text-decoration: var(--bkbg-brc-sub-text-decoration, none);
  line-height: var(--bkbg-brc-sub-line-height-d, var(--bkbg-brc-sub-line-height, 1.5));
  letter-spacing: var(--bkbg-brc-sub-letter-spacing-d, var(--bkbg-brc-sub-letter-spacing, normal));
  word-spacing: var(--bkbg-brc-sub-word-spacing-d, var(--bkbg-brc-sub-word-spacing, normal));
}

/* Input row */
.bkbg-brc-input-row {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.bkbg-brc-input {
    padding: 10px 14px;
    border-radius: 8px;
    border: 2px solid #e5e7eb;
    font-size: 15px;
    font-family: monospace;
    text-align: center;
    outline: none;
    transition: border-color 0.2s;
    min-width: 200px;
    max-width: 340px;
    width: 100%;
}

.bkbg-brc-input:focus {
    border-color: var(--bkbg-brc-accent, #1f2937);
}

.bkbg-brc-generate-btn {
    padding: 10px 22px;
    border-radius: 8px;
    border: none;
    font-weight: 700;
    font-size: 14px;
    color: #fff;
    cursor: pointer;
    transition: opacity 0.2s, transform 0.1s;
}

.bkbg-brc-generate-btn:hover  { opacity: 0.85; }
.bkbg-brc-generate-btn:active { transform: scale(0.97); }

/* Canvas area */
.bkbg-brc-canvas-wrap {
    display: flex;
    justify-content: center;
    margin-bottom: 16px;
}

.bkbg-brc-canvas {
    border-radius: 8px;
    border: 1px solid #e5e7eb;
    display: block;
    max-width: 100%;
}

/* Error message */
.bkbg-brc-error {
    color: #ef4444;
    font-size: 13px;
    margin-bottom: 10px;
    min-height: 18px;
}

/* Action buttons */
.bkbg-brc-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.bkbg-brc-action-btn {
    padding: 9px 22px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: opacity 0.2s, transform 0.1s;
    border: 2px solid;
    background: transparent;
}

.bkbg-brc-action-btn:hover  { opacity: 0.75; }
.bkbg-brc-action-btn:active { transform: scale(0.97); }

/* Toast notification */
.bkbg-brc-toast {
    position: fixed;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: #111827;
    color: #fff;
    padding: 10px 22px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s, transform 0.3s;
    z-index: 9999;
}

.bkbg-brc-toast.bkbg-brc-toast-show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

@media (max-width: 480px) {
    .bkbg-brc-wrap { padding: 14px 10px; }
    .bkbg-brc-input { font-size: 13px; }
}

@media (max-width: 1024px) {
    /* ── Title ─────────────────────────────────────────────── */
.bkbg-brc-title {
        font-size: var(--bkbg-brc-title-font-size-t, var(--bkbg-brc-title-font-size-d, var(--bkbg-brc-title-font-size, 26px)));
        line-height: var(--bkbg-brc-title-line-height-t, var(--bkbg-brc-title-line-height-d, var(--bkbg-brc-title-line-height, 1.2)));
        letter-spacing: var(--bkbg-brc-title-letter-spacing-t, var(--bkbg-brc-title-letter-spacing-d, var(--bkbg-brc-title-letter-spacing, normal)));
        word-spacing: var(--bkbg-brc-title-word-spacing-t, var(--bkbg-brc-title-word-spacing-d, var(--bkbg-brc-title-word-spacing, normal)));
    }
    /* ── Subtitle ──────────────────────────────────────────── */
.bkbg-brc-subtitle {
        font-size: var(--bkbg-brc-sub-font-size-t, var(--bkbg-brc-sub-font-size-d, var(--bkbg-brc-sub-font-size, 14px)));
        line-height: var(--bkbg-brc-sub-line-height-t, var(--bkbg-brc-sub-line-height-d, var(--bkbg-brc-sub-line-height, 1.5)));
        letter-spacing: var(--bkbg-brc-sub-letter-spacing-t, var(--bkbg-brc-sub-letter-spacing-d, var(--bkbg-brc-sub-letter-spacing, normal)));
        word-spacing: var(--bkbg-brc-sub-word-spacing-t, var(--bkbg-brc-sub-word-spacing-d, var(--bkbg-brc-sub-word-spacing, normal)));
    }
}
@media (max-width: 767px) {
    /* ── Title ─────────────────────────────────────────────── */
.bkbg-brc-title {
        font-size: var(--bkbg-brc-title-font-size-m, var(--bkbg-brc-title-font-size-t, var(--bkbg-brc-title-font-size-d, var(--bkbg-brc-title-font-size, 26px))));
        line-height: var(--bkbg-brc-title-line-height-m, var(--bkbg-brc-title-line-height-t, var(--bkbg-brc-title-line-height-d, var(--bkbg-brc-title-line-height, 1.2))));
        letter-spacing: var(--bkbg-brc-title-letter-spacing-m, var(--bkbg-brc-title-letter-spacing-t, var(--bkbg-brc-title-letter-spacing-d, var(--bkbg-brc-title-letter-spacing, normal))));
        word-spacing: var(--bkbg-brc-title-word-spacing-m, var(--bkbg-brc-title-word-spacing-t, var(--bkbg-brc-title-word-spacing-d, var(--bkbg-brc-title-word-spacing, normal))));
    }
    /* ── Subtitle ──────────────────────────────────────────── */
.bkbg-brc-subtitle {
        font-size: var(--bkbg-brc-sub-font-size-m, var(--bkbg-brc-sub-font-size-t, var(--bkbg-brc-sub-font-size-d, var(--bkbg-brc-sub-font-size, 14px))));
        line-height: var(--bkbg-brc-sub-line-height-m, var(--bkbg-brc-sub-line-height-t, var(--bkbg-brc-sub-line-height-d, var(--bkbg-brc-sub-line-height, 1.5))));
        letter-spacing: var(--bkbg-brc-sub-letter-spacing-m, var(--bkbg-brc-sub-letter-spacing-t, var(--bkbg-brc-sub-letter-spacing-d, var(--bkbg-brc-sub-letter-spacing, normal))));
        word-spacing: var(--bkbg-brc-sub-word-spacing-m, var(--bkbg-brc-sub-word-spacing-t, var(--bkbg-brc-sub-word-spacing-d, var(--bkbg-brc-sub-word-spacing, normal))));
    }
}