.calculator{margin:auto;max-width:1100px}.layout{display:grid;gap:24px;grid-template-columns:1fr 1fr}.card{background:#fff;border-radius:14px;box-shadow:0 6px 20px rgba(0,0,0,.05);padding:24px}.form{display:grid;gap:10px}.toggle{background:#f3f4f6;border-radius:10px;display:inline-flex;gap:4px;padding:4px}.toggle button{background:none;border:none;border-radius:8px;cursor:pointer;padding:6px 12px}.toggle button.active{background:#fff;box-shadow:0 2px 6px rgba(0,0,0,.1)}.presets{display:flex;gap:6px}.presets button{background:#fff;border:1px solid #ddd;border-radius:6px;cursor:pointer;padding:4px 8px}.main-result{margin-bottom:15px;text-align:center}.big{font-size:36px;font-weight:700}.small{color:#666}.row{display:flex;justify-content:space-between;margin:8px 0}.chart-wrap{margin-top:20px}