.theme-builder-container{display:flex;flex:1;overflow:hidden;height:100%;width:100%}.theme-builder-sidebar{width:350px;padding:1.5rem;border-right-width:1px;border-right-style:solid;overflow-y:auto;display:flex;flex-direction:column;gap:3rem;flex-shrink:0}.theme-builder-main{flex:1;padding:0;overflow-y:auto}.theme-builder-header h2{margin:0 0 .5rem}.theme-builder-header p{margin:0;font-size:.9rem}.theme-builder-preview-page{min-height:100%;padding:2rem}.theme-builder-preview-card{padding:2rem;border-radius:8px;max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:2rem}.preview-section h3,.preview-section p{margin-bottom:1rem}.preview-controls{display:flex;gap:1rem;align-items:center;flex-wrap:wrap}.preview-button{appearance:none;box-sizing:border-box;display:inline-flex;align-items:center;justify-content:center;margin:0;font-family:inherit;font-size:1rem;line-height:1.5;font-weight:700;padding:.75rem 1.5rem;border-radius:6px;border:1px solid var(--computed-border-dec-color, transparent);cursor:pointer}.preview-input{box-sizing:border-box;display:inline-flex;align-items:center;margin:0;font-family:inherit;font-size:1rem;line-height:1.5;padding:.75rem 1rem;border-radius:6px;border:1px solid var(--computed-border-dec-color, transparent)}.preview-code{padding:.2rem .4rem;border-radius:4px}.preview-brand-group{display:flex;gap:1rem;align-items:center;flex-wrap:wrap}.preview-brand-card{box-sizing:border-box;display:inline-flex;align-items:center;margin:0;font-family:inherit;font-size:1rem;line-height:1.5;padding:.75rem 1.5rem;border-radius:6px;border:1px solid var(--computed-border-dec-color, transparent)}.preview-typography-card{padding:1.5rem;border-radius:8px}.preview-typography-card h3{margin-top:0}.preview-empty-state{padding:3rem;border-radius:8px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:1rem}.preview-empty-icon{font-size:2rem;opacity:.5}.preview-empty-text{margin:0;max-width:400px}.preview-group-title{margin:0 0 .5rem;font-size:.9rem;text-transform:uppercase;letter-spacing:.05em}.preview-surface-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1rem}.preview-surface-card{padding:1.5rem;border-radius:8px;display:flex;flex-direction:column;gap:.5rem}.preview-surface-label{font-weight:700}.preview-surface-code{font-size:.8rem}@media(max-width:768px){.theme-builder-container{flex-direction:column;overflow-y:auto}.theme-builder-sidebar{width:100%;height:auto;border-right:none;border-bottom-width:1px;border-bottom-style:solid;overflow-y:visible;padding:1rem;gap:1.5rem}.theme-builder-main{overflow-y:visible}.theme-builder-preview-page,.theme-builder-preview-card{padding:1rem}.preview-controls{flex-direction:column;align-items:stretch}.preview-button{width:100%;text-align:center}}.dual-range-container{position:relative;height:30px;width:100%;margin:10px 0}.dual-range-track{position:absolute;top:50%;transform:translateY(-50%);height:4px;width:100%;background:var(--border-subtle-token);border-radius:2px}.dual-range-highlight{position:absolute;top:50%;transform:translateY(-50%);height:4px;background:var(--key-brand-color, #6e56cf);border-radius:2px;opacity:.5}.dual-range-input{position:absolute;top:50%;transform:translateY(-50%);left:0;width:100%;appearance:none;background:transparent;pointer-events:none;margin:0;z-index:2}.dual-range-input::-webkit-slider-thumb{pointer-events:auto;appearance:none;width:18px;height:18px;border-radius:50%;background:var(--text-high-token);cursor:pointer;border:2px solid var(--surface-token);box-shadow:0 1px 3px #0000004d}.dual-range-input::-moz-range-thumb{pointer-events:auto;width:18px;height:18px;border-radius:50%;background:var(--text-high-token);cursor:pointer;border:2px solid var(--surface-token);box-shadow:0 1px 3px #0000004d}.dual-range-input:disabled::-webkit-slider-thumb{background:var(--text-subtle-token);cursor:not-allowed;border-color:var(--border-subtle-token)}.dual-range-input:disabled::-moz-range-thumb{background:var(--text-subtle-token);cursor:not-allowed;border-color:var(--border-subtle-token)}.preview-tabs{display:flex;align-items:center}.tab-button{background:none;border:none;padding:.5rem 1rem;cursor:pointer;font-weight:500;color:var(--text-subtle-token);border-bottom:2px solid transparent;transition:color .2s,border-color .2s}.tab-button:hover{color:var(--text-high-token)}.tab-button.active{color:var(--text-high-token);border-bottom-color:var(--surface-action)}