:root{--tip-primary:#2563eb;--tip-secondary:#0ea5e9;--tip-success:#16a34a;--tip-warning:#f59e0b;--tip-danger:#dc2626;--tip-gradient:linear-gradient(135deg, #2563eb 0%, #26dee7 100%)}body{background:#f4f7fb}.tip-card{border:none;border-radius:18px;overflow:hidden}.summary-card{background:var(--tip-gradient);color:#fff}.section-title{font-size:.78rem;font-weight:800;text-transform:uppercase;letter-spacing:.5px;color:var(--tip-primary);border-bottom:2px solid #eef2ff;padding-bottom:8px;margin-bottom:18px}.input-group-text{min-width:55px;background:#f8fafc;border-right:none;font-weight:700}.form-control{border-left:none}.sticky-summary{position:sticky;top:20px}.summary-box{background:rgba(255,255,255,.12);border-radius:12px;padding:14px;margin-bottom:12px}.result-big{font-size:2.6rem;font-weight:800}.chart-wrapper{position:relative;width:100%;height:320px}.metric-card{background:#fff;border-radius:14px;padding:16px;box-shadow:0 2px 10px rgba(0,0,0,.05);height:100%}.metric-label{font-size:.72rem;font-weight:700;color:#6b7280;text-transform:uppercase}.metric-value{font-size:1.1rem;font-weight:800;color:#111827}.table-wrapper{max-height:500px;overflow:auto}.tax-positive{color:#dc2626;font-weight:700}.tip-positive{color:#16a34a;font-weight:700}.insight-box{background:#fff;border-radius:14px;padding:18px;box-shadow:0 2px 10px rgba(0,0,0,.05)}.insight-title{color:var(--tip-primary);font-weight:800;margin-bottom:10px}