:root{--primary: #2e3fb1;--border-color: #e2e8f0;--text-main: #1e293b;--text-muted: #64748b}.calc-tool-container{max-width:600px;margin:0 auto}.calc-card{background:#fff;border:1px solid var(--border-color);border-radius:12px;padding:24px;margin-bottom:24px}.calc-form .form-group{margin-bottom:16px}.calc-form label{display:block;font-size:.875rem;font-weight:500;margin-bottom:6px;color:var(--text-main)}.calc-form input,.calc-form select{width:100%;padding:10px 14px;border:1px solid var(--border-color);border-radius:8px;font-size:1rem}.calc-form input:focus{outline:none;border-color:var(--primary)}.calc-result{background:linear-gradient(135deg,#eff6ff,#dbeafe);border:1px solid #bfdbfe;border-radius:12px;padding:24px;text-align:center}.calc-result .result-value{font-size:2.5rem;font-weight:700;color:var(--primary)}.calc-result .result-label{font-size:.9rem;color:var(--text-muted);margin-top:8px}.calc-info{font-size:.85rem;color:var(--text-muted);margin-top:16px;padding-top:16px;border-top:1px solid var(--border-color)}