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.spinner{display:inline-block;width:48px;height:48px;border:4px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.tool-loading p{margin-top:1rem;color:var(--color-text-muted)}.audit-score-card{text-align:center;padding:2rem;margin-bottom:2rem;background:var(--color-bg-alt);border-radius:var(--radius-lg);border:1px solid 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p{margin-bottom:1rem;color:var(--color-text-muted)}.tool-error{text-align:center;padding:2rem;color:#ef4444;background:#ef44440d;border:1px solid rgba(239,68,68,.2);border-radius:var(--radius-md)}@media(max-width:640px){.tool-form{flex-direction:column}.score-number{font-size:3rem}.score-summary{flex-direction:column;gap:.5rem}.pixel-summary{gap:1rem}.pixel-stat .stat-number{font-size:2rem}.form-row,.checkbox-grid{grid-template-columns:1fr!important}}.tool-form-grid{flex-direction:column;gap:1rem}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.form-group{display:flex;flex-direction:column;gap:.35rem}.form-group label{font-size:.85rem;font-weight:600;color:var(--color-text-secondary, #D1D5DB)}.tool-form-grid input[type=number],.tool-form-grid select{padding:.75rem 1rem;border:2px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-bg-alt);color:var(--color-text);font-size:.95rem;transition:border-color .2s ease}.tool-form-grid 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