.bst{display:flex;flex-direction:column;gap:20px}.bst__preview{display:flex;flex-direction:column;align-items:center;gap:16px;padding:40px 20px;border:1px solid var(--color-border);border-radius:var(--radius-md);transition:background var(--transition-fast, .15s)}.bst__preview--light{background:#f5f5f7}.bst__preview--dark{background:#1a1a2e}.bst__preview-box{width:180px;height:120px;border-radius:12px;background:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:600;color:var(--color-text);transition:box-shadow .15s ease}.bst__preview-switch{display:inline-flex;gap:8px}.bst__btn{padding:6px 14px;border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-bg);color:var(--color-text);font-size:13px;cursor:pointer;transition:background var(--transition-fast, .15s),border-color var(--transition-fast, .15s)}.bst__btn:hover{border-color:var(--color-primary, #2b6cff)}.bst__btn--toggle.is-active{background:var(--color-primary, #2b6cff);color:#fff;border-color:var(--color-primary, #2b6cff)}.bst__btn--preset{font-size:13px}.bst__btn--add{align-self:flex-start;padding:8px 18px;border-style:dashed;color:var(--color-primary, #2b6cff)}.bst__btn--copy{font-size:13px}.bst__btn--danger{padding:4px 10px;font-size:12px;color:var(--color-danger, #e53e3e);border-color:var(--color-danger, #e53e3e)}.bst__btn--danger:hover{background:var(--color-danger, #e53e3e);color:#fff}.bst__presets{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:14px 16px;background:var(--color-bg-soft, rgba(0, 0, 0, .03));border:1px solid var(--color-border);border-radius:var(--radius-md)}.bst__presets-label{font-size:14px;font-weight:600;color:var(--color-text)}.bst__layers{display:flex;flex-direction:column;gap:12px}.bst__empty{padding:20px;text-align:center;color:var(--color-text-soft);font-style:italic}.bst__layer{padding:16px;border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-bg)}.bst__layer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.bst__layer-enable{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--color-text)}.bst__layer-enable input{width:16px;height:16px;accent-color:var(--color-primary, #2b6cff)}.bst__layer-params{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px 20px}.bst__field{display:flex;flex-direction:column;gap:4px;font-size:13px;color:var(--color-text)}.bst__field>span{font-weight:600}.bst__field input[type=range]{width:100%;accent-color:var(--color-primary, #2b6cff)}.bst__field output{font-size:12px;color:var(--color-text-soft);font-family:var(--font-mono)}.bst__field--color{flex-direction:row;align-items:center;gap:8px;flex-wrap:wrap}.bst__field--color>span{margin-right:4px}.bst__field--color input[type=color]{width:32px;height:32px;padding:0;border:1px solid var(--color-border);border-radius:var(--radius-sm);cursor:pointer;background:none}.bst__color-text{width:130px;padding:4px 8px;border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-bg);color:var(--color-text);font-family:var(--font-mono);font-size:12px}.bst__field--inset{flex-direction:row;align-items:center;gap:8px}.bst__field--inset input{width:16px;height:16px;accent-color:var(--color-primary, #2b6cff)}.bst__output{padding:16px;background:var(--color-bg-soft, rgba(0, 0, 0, .03));border:1px solid var(--color-border);border-radius:var(--radius-md)}.bst__output-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.bst__output-label{font-size:14px;font-weight:600;color:var(--color-text)}.bst__code{margin:0;padding:12px 14px;background:var(--color-bg);border-radius:var(--radius-sm);font-family:var(--font-mono);font-size:14px;color:var(--color-text);white-space:pre-wrap;word-break:break-all;line-height:1.5}.bst__hint{margin:8px 0 0;font-size:13px;color:var(--color-text-soft)}@media(prefers-color-scheme:dark){.bst__preview--light{background:#2a2a3e}.bst__preview-box{background:#f0f0f5}.bst__layer,.bst__code{background:#ffffff0a}.bst__color-text{background:#0003}}@media(max-width:768px){.bst__layer-params{grid-template-columns:1fr}.bst__preview-box{width:140px;height:100px}}@media(max-width:414px){.bst__preview{padding:24px 12px}.bst__presets{flex-direction:column;align-items:stretch}.bst__presets-label{text-align:center}}