.calc3d__hero{max-width:760px;margin:0 auto 2rem;text-align:center}.calc3d__hero h1{font-size:clamp(1.8rem, 4vw, 2.6rem);margin-bottom:.75rem}.calc3d__hero p{color:var(--subtext);font-size:1.02rem}.calc3d__empty{text-align:center;color:var(--subtext);padding:3rem 0}.calc3d__layout{display:grid;grid-template-columns:minmax(0,1fr) 380px;gap:1.5rem;align-items:start}.calc3d__config{display:flex;flex-direction:column;gap:1.25rem}.calc3d__block{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem}.calc3d__step{display:flex;align-items:center;gap:.6rem;font-weight:700;font-size:1.1rem;margin-bottom:1rem}.calc3d__num{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;background:var(--primary);color:#fff;font-size:.9rem;flex-shrink:0}.calc3d__label{font-weight:700;font-size:1.05rem;margin-bottom:.9rem}.calc3d__materials{display:flex;flex-wrap:wrap;gap:.5rem}.calc3d__mat{padding:.55rem .95rem;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--bg-input);color:var(--text);font-size:.9rem;font-weight:600;cursor:pointer;transition:border-color var(--transition),background var(--transition),color var(--transition)}.calc3d__mat:hover{border-color:var(--border-hover)}.calc3d__mat.is-active{background:var(--primary);border-color:var(--primary);color:#fff}.calc3d__matdesc{margin-top:.9rem;color:var(--subtext);font-size:.9rem;line-height:1.5}.calc3d__colors{display:flex;flex-wrap:wrap;gap:.55rem}.calc3d__color{width:34px;height:34px;border-radius:50%;cursor:pointer;padding:0;background:var(--sw);border:2px solid var(--border);box-shadow:inset 0 0 0 1px rgba(0,0,0,.08);transition:transform var(--transition),border-color var(--transition)}.calc3d__color:hover{transform:scale(1.1)}.calc3d__color.is-active{border-color:var(--primary);box-shadow:0 0 0 2px var(--primary),inset 0 0 0 1px rgba(0,0,0,.08)}.calc3d__colorname{margin-top:.8rem;color:var(--subtext);font-size:.9rem}.calc3d__params{display:flex;flex-wrap:wrap;gap:16px;align-items:flex-start}.calc3d__weight{display:flex;align-items:center;gap:.5rem}.calc3d__weight input{max-width:140px}.calc3d__weight span{color:var(--subtext);font-weight:600}.calc3d__qty{display:flex;align-items:center;gap:.5rem}.calc3d__qty input{max-width:90px;text-align:center}.calc3d__qty button{width:40px;height:44px;flex-shrink:0;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--bg-input);color:var(--text);font-size:1.3rem;line-height:1;cursor:pointer;transition:border-color var(--transition)}.calc3d__qty button:hover{border-color:var(--border-hover)}.calc3d__hint{margin-top:1rem;color:var(--subtext);font-size:.85rem;line-height:1.5}.calc3d__summary{position:sticky;top:calc(var(--nav-h) + 1rem);background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;box-shadow:var(--shadow)}.calc3d__summary-title{font-size:1.2rem;margin-bottom:1rem}.calc3d__lines{display:flex;flex-direction:column;gap:.6rem;margin-bottom:1rem}.calc3d__line{display:flex;justify-content:space-between;gap:1rem;font-size:.92rem;color:var(--subtext)}.calc3d__line span:last-child{color:var(--text);font-weight:600;white-space:nowrap}.calc3d__total{display:flex;justify-content:space-between;align-items:baseline;padding-top:1rem;border-top:1px solid var(--border)}.calc3d__total strong{font-size:1.6rem;color:var(--primary)}.calc3d__perunit{color:var(--subtext);font-size:.85rem;margin-top:.35rem}.calc3d__note{color:var(--subtext);font-size:.82rem;line-height:1.5;margin:1rem 0}.calc3d__form{display:flex;flex-direction:column;gap:0}.calc3d__form .form-group{margin-bottom:.9rem}.calc3d__req{color:var(--danger)}.calc3d__agree{color:var(--muted);font-size:.78rem;margin-top:.75rem;line-height:1.5}.calc3d__agree a{color:var(--primary)}@media (max-width:900px){.calc3d__layout{grid-template-columns:1fr}.calc3d__summary{position:static}}