:root{--calc-surface:#fff;--calc-surface-2:#f5f9f6;--calc-surface-3:#eaf2ed;--calc-border:#d8e4dd;--calc-border-strong:#bcd0c4;--calc-text:#0e2b23;--calc-muted:#5b7169;--calc-primary:#0b6652;--calc-primary-soft:#e8f3ed;--calc-shadow:0 1px 2px #0e2b230a, 0 10px 30px -18px #0e2b2340;--calc-shadow-hover:0 2px 6px #0e2b230f, 0 22px 46px -22px #0e2b2352;--calc-ring:0 0 0 3px #0b66522e;--background:var(--calc-surface-2);--card:var(--calc-surface);--secondary:var(--calc-surface-3);--foreground:var(--calc-text);--muted-foreground:var(--calc-muted);--primary:var(--calc-primary);--primary-foreground:#fff;--border:var(--calc-border);--font-display:"Sansation", ui-sans-serif, system-ui, sans-serif}.lang-bar{border-bottom:1px solid var(--border);background:linear-gradient(180deg, var(--calc-surface-3), var(--calc-surface-2))}.lang-inner{justify-content:flex-end;align-items:center;gap:.75rem;max-width:72rem;margin:0 auto;padding:.6rem 1rem;display:flex}.lang-label{letter-spacing:.14em;text-transform:uppercase;color:var(--muted-foreground);font-size:.7rem;font-weight:700}.lang-switch{border:1px solid var(--calc-border-strong);background:var(--calc-surface);border-radius:999px;padding:.25rem;display:inline-flex;position:relative;box-shadow:inset 0 1px 2px #0e2b230f}.lang-thumb{background:var(--primary);border-radius:999px;width:calc(50% - .25rem);height:calc(100% - .5rem);transition:transform .28s cubic-bezier(.4,0,.2,1);position:absolute;top:.25rem;left:.25rem;box-shadow:0 2px 8px #0b665259}.lang-switch[data-active=en] .lang-thumb{transform:translate(100%)}.lang-opt{z-index:1;min-width:6rem;color:var(--muted-foreground);cursor:pointer;background:0 0;border:0;border-radius:999px;padding:.45rem 1rem;font-family:inherit;font-size:.85rem;font-weight:700;transition:color .2s;position:relative}.lang-opt:hover:not(.is-active){color:var(--primary)}.lang-opt.is-active{color:var(--primary-foreground)}.lang-opt:focus-visible{box-shadow:var(--calc-ring);outline:none}.card{border:1px solid var(--border);background:var(--card);box-shadow:var(--calc-shadow);border-radius:1rem;padding:1.5rem;transition:border-color .25s,box-shadow .25s,transform .25s}.card:hover{border-color:var(--calc-border-strong);box-shadow:var(--calc-shadow-hover);transform:translateY(-2px)}.card:focus-within{border-color:color-mix(in oklab, var(--primary) 45%, var(--border))}.card h3{border-bottom:1px solid var(--border);letter-spacing:.12em;text-transform:uppercase;color:var(--muted-foreground);margin:0;padding-bottom:.7rem;font-size:.78rem;font-weight:700}.headline{border:1px solid color-mix(in oklab, var(--primary) 30%, var(--border));background:linear-gradient(180deg, var(--calc-primary-soft), var(--calc-surface));box-shadow:var(--calc-shadow);border-radius:1rem;padding:1.6rem}.lbl{color:var(--foreground);font-size:.92rem;font-weight:600;display:block}.fld{border:1px solid var(--calc-border-strong);background:var(--card);width:100%;color:var(--foreground);font:inherit;border-radius:.75rem;outline:none;margin-top:.45rem;padding:.72rem 1rem;font-size:.95rem;transition:border-color .2s,box-shadow .2s;box-shadow:inset 0 1px 2px #0e2b230a}.fld:hover{border-color:color-mix(in oklab, var(--primary) 35%, var(--calc-border-strong))}.fld:focus{border-color:var(--primary);box-shadow:var(--calc-ring)}.num{font-variant-numeric:tabular-nums}.step-grid{grid-template-columns:1fr;gap:1.1rem;display:grid}@media (width>=640px){.step-grid{grid-template-columns:1fr 1fr}}.step-row{align-items:stretch;gap:.5rem;margin-top:.45rem;display:flex}.step-btn{border:1px solid var(--calc-border-strong);background:var(--secondary);min-height:3.3rem;color:var(--foreground);cursor:pointer;border-radius:.75rem;flex:0 0 3rem;font-family:inherit;font-size:1.4rem;font-weight:600;line-height:1;transition:border-color .15s,color .15s,background .15s}.step-btn:hover{border-color:var(--primary);color:var(--primary);background:var(--calc-primary-soft)}.step-btn:active{transform:scale(.94)}.step-btn:focus-visible{box-shadow:var(--calc-ring);outline:none}.step-in{text-align:center;flex:1;min-width:0;margin-top:0;font-size:1.2rem;font-weight:700}.step-hint{color:var(--muted-foreground);margin-top:.35rem;font-size:.78rem;display:block}.info-line{border:1px solid var(--border);border-left:3px solid var(--primary);background:var(--calc-primary-soft);color:var(--calc-muted);border-radius:.75rem;flex-wrap:wrap;align-items:center;gap:.45rem;margin-top:1.4rem;padding:.85rem 1rem;font-size:.88rem;display:flex}.info-line strong{color:var(--foreground);font-weight:600}.dot{color:var(--calc-border-strong)}.btn-primary,.btn-ghost{cursor:pointer;border-radius:999px;min-height:48px;padding:.75rem 1.7rem;font-family:inherit;font-size:.95rem;font-weight:600;transition:all .2s}.btn-primary{background:linear-gradient(180deg, color-mix(in oklab, var(--primary) 86%, #fff), var(--primary));color:var(--primary-foreground);border:1px solid color-mix(in oklab, var(--primary) 72%, #000);box-shadow:0 1px 2px #0e2b231f,0 10px 22px -14px #0b6652cc}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 4px 10px #0e2b2324,0 18px 30px -16px #0b6652e6}.btn-primary:active{transform:translateY(0)scale(.985)}.btn-primary:focus-visible{box-shadow:var(--calc-ring), 0 1px 2px #0e2b231f;outline:none}.btn-ghost{background:var(--card);color:var(--foreground);border:1px solid var(--calc-border-strong);padding:.75rem 1.35rem}.btn-ghost:hover{background:var(--calc-primary-soft);border-color:var(--primary);color:var(--primary)}.btn-ghost:focus-visible{box-shadow:var(--calc-ring);outline:none}.disc{border:1px solid var(--border);background:var(--card);box-shadow:var(--calc-shadow);border-radius:1rem;margin-top:1.25rem;padding:0 1.25rem;transition:border-color .25s}.disc:hover{border-color:var(--calc-border-strong)}.disc[open]{border-color:color-mix(in oklab, var(--primary) 40%, var(--border))}.disc summary{cursor:pointer;color:var(--foreground);justify-content:space-between;align-items:center;gap:1rem;padding:1rem 0;font-size:.95rem;font-weight:600;list-style:none;display:flex}.disc summary::-webkit-details-marker{display:none}.disc summary:after{content:"+";border:1px solid var(--calc-border-strong);width:1.7rem;height:1.7rem;color:var(--primary);border-radius:999px;flex:none;place-items:center;font-weight:700;line-height:1;transition:all .2s;display:grid}.disc[open] summary:after{content:"−";background:var(--primary);border-color:var(--primary);color:#fff}.disc[open]>:last-child{margin-bottom:1.1rem}.disc summary:focus-visible{outline:none}.calc-stat{background:var(--calc-surface-2);border-radius:.6rem;justify-content:space-between;align-items:baseline;gap:1rem;margin:.3rem 0;padding:.6rem .8rem;font-size:.95rem;display:flex}.calc-stat:nth-child(odd){background:var(--calc-surface-3)}.calc-stat span{color:var(--muted-foreground)}.calc-stat b{color:var(--foreground);font-variant-numeric:tabular-nums;white-space:nowrap;font-weight:700}.calc-stat.is-total{background:var(--calc-primary-soft);border:1px solid color-mix(in oklab, var(--primary) 30%, transparent);padding:.7rem .8rem;font-size:1rem}.calc-stat.is-total b{color:var(--primary);font-size:1.15rem}.big-num{font-family:var(--font-display);color:var(--primary);margin-top:.3rem;font-size:clamp(2rem,5vw,2.7rem);font-weight:700;line-height:1.1}.big-cap{color:var(--muted-foreground);margin-top:.35rem;font-size:.82rem}