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var(--primary);outline-offset:2px}@media (width>=769px){::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-page)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}}.upside-btn{z-index:990;background:linear-gradient(135deg, var(--primary), #0284c7);color:#fff;border-radius:var(--radius-full);font-family:var(--font-sans);cursor:pointer;opacity:0;pointer-events:none;user-select:none;touch-action:manipulation;border:1px solid #ffffff40;justify-content:center;align-items:center;gap:.4rem;padding:.65rem 1.15rem;font-size:.85rem;font-weight:700;transition:opacity .25s cubic-bezier(.16,1,.3,1),transform .25s cubic-bezier(.16,1,.3,1),box-shadow .2s;display:inline-flex;position:fixed;bottom:2rem;right:2rem;transform:translateY(20px)scale(.9);box-shadow:0 4px 15px #10b98159,0 2px 6px #00000026}.upside-btn.visible{opacity:1;pointer-events:auto;transform:translateY(0)scale(1)}.upside-btn:hover{transform:translateY(-2px)scale(1.04);box-shadow:0 6px 22px #10b98173,0 3px 8px #0003}.upside-btn:active{transform:scale(.96)}.upside-arrow{font-size:1.1rem;font-weight:900;line-height:1;transition:transform .2s}.upside-btn:hover .upside-arrow{transform:translateY(-2px)}.upside-label{letter-spacing:.02em}@media (width<=640px){.upside-btn{padding:.55rem .95rem;font-size:.8rem;bottom:1.25rem;right:1.25rem;box-shadow:0 4px 14px #0000004d}}@media print{body{color:#000!important;background:#fff!important}.site-header,.site-footer,.tool-tabs,.action-bar,.preset-chips,.preset-chips-label,.content-section,.theme-toggle-btn,.mobile-nav-drawer,.mobile-nav-backdrop,.upside-btn{display:none!important}.calculator-card{box-shadow:none!important;border:none!important}.calc-grid{padding:0!important;display:block!important}.result-display{background:#fff!important;border:2px solid #000!important}.result-card-main:before{display:none!important}}