:root{--accent:#0d6efd;--muted:#6c757d;--card-bg:#ffffff}body,html{height:100%}body{font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial;background:linear-gradient(180deg,#fbfdff 0,#f4f7fb 100%);color:#0b2a4a;padding-top:1rem}header.site-header{margin-bottom:1rem}.tool-card{border-radius:12px;background:var(--card-bg);box-shadow:0 6px 18px rgba(16,24,40,.05)}label.required::after{content:" *";color:#d63384}.ad-placeholder{background:linear-gradient(90deg,rgba(0,0,0,.03),rgba(0,0,0,.02));border:2px dashed rgba(0,0,0,.06);color:var(--muted);display:flex;align-items:center;justify-content:center;min-height:60px;text-align:center;padding:.75rem;border-radius:8px}.result-number{font-weight:700;font-size:1.25rem;color:var(--accent)}.fraction-row .form-control{max-width:140px}.small-muted{color:var(--muted);font-size:.9rem}footer.site-footer{margin-top:1.5rem;padding-top:1rem;padding-bottom:2rem;color:var(--muted)}.lcd-chip{display:inline-block;padding:.35rem .6rem;border-radius:.5rem;background:#e9f2ff;border:1px solid rgba(13,110,253,.12);color:var(--accent);font-weight:600}@media (max-width:576px){.fraction-row .form-control{max-width:100%}}