.calculator{background:#fff;padding:20px;border-radius:12px;box-shadow:0 4px 12px rgba(0,0,0,0.04);margin:20px 0;border:1px solid #e0e7ef}.tabs{display:inline-flex;align-items:center;gap:8px;margin-bottom:20px;background:#f2f6fc;padding:6px;border-radius:10px;justify-content:flex-start}.tab-btn{flex:0 0 auto;padding:10px 12px;border:none;border-radius:8px;background:transparent;cursor:pointer;font-weight:600;color:#2e546a;text-align:center;font-size:.9rem;transition:all .18s ease}.tab-btn.active{background:#1a4b5f;color:#fff;box-shadow:0 2px 6px rgba(0,0,0,0.08)}.form-container{display:none}.form-container.active{display:block}.input-group{background:#fefcf5;border:1px solid #ecdca8;margin-bottom:20px;padding:10px;border-radius:10px}.input-label{display:block;color:#1a3f5c;font-weight:600;margin-bottom:10px;font-size:.95rem}.date-inputs{display:flex;gap:8px;align-items:center}.date-input-wrapper{position:relative;min-width:100px;flex:1;background:#fff;border:2px solid #d0ddee;border-radius:8px;padding:4px 6px;box-shadow:0 2px 6px rgba(0,0,0,0.02)}.date-input{width:100%;padding:8px 10px;border-radius:6px;border:0;text-align:center;cursor:pointer;background:transparent;font-size:.95rem}.date-input:focus{outline:none;background:#f2f6fc}.date-list{position:absolute;top:calc(100% + 8px);left:0;right:0;background:#fff;border:2px solid #1a4b5f;border-radius:8px;max-height:240px;overflow:auto;display:none;box-shadow:0 8px 26px rgba(0,0,0,0.08);z-index:1050}.date-list.active{display:block}.date-item{padding:10px;text-align:center;border-bottom:1px solid #dce5ec;cursor:pointer}.date-item:last-child{border-bottom:none}.date-item:hover{background:#f2f6fc}.calculate-btn{display:block;margin:20px auto 0;background:#1a4b5f;color:#fff;border:0;padding:10px 18px;border-radius:10px;cursor:pointer;font-weight:700;font-size:1rem;min-width:120px;box-shadow:0 8px 22px rgba(0,0,0,0.04);transition:all .18s ease;text-align:center}.calculate-btn:hover{transform:translateY(-2px);background:#1a3f5c;box-shadow:0 10px 28px rgba(0,0,0,0.08)}.results-container{margin-top:25px;padding:20px;background:#fefcf5;border-radius:10px;border:1px solid #ecdca8;display:none}.results-container.show{display:block}.results-title{color:#1a3f5c;font-size:1.1rem;margin-bottom:16px;padding-bottom:12px;border-bottom:2px solid #ecdca8;font-weight:700}.results-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin-bottom:20px}.result-card{background:#fff;padding:16px;border-radius:8px;border:1px solid #e0e7ef;text-align:center;transition:transform .2s ease}.result-card:hover{transform:translateY(-2px);box-shadow:0 4px 8px rgba(0,0,0,0.05)}.result-value{font-size:1.3rem;font-weight:700;color:#1a3f5c;display:block;margin-bottom:6px}.result-label{color:#5a6c7d;font-size:.85rem;margin-bottom:4px;display:block}.details-container{background:#fff;padding:16px;border-radius:10px;margin-top:20px;border:1px solid #e0e7ef}.details-title{color:#1a3f5c;margin-bottom:12px;font-size:1rem;font-weight:600}.details-list{padding-right:16px;margin:0}.details-list li{margin-bottom:8px;line-height:1.5;font-size:.9rem;color:#1a3f5c}.type-toggle{display:inline-flex;gap:8px;margin-bottom:12px;padding:6px;border-radius:10px;border:1px solid #d0ddee;background:#fff;align-items:center}.type-btn{padding:8px 16px;border:2px solid #d0ddee;border-radius:6px;background:#fff;cursor:pointer;font-size:.9rem}.type-btn.active{border:1px solid #ecdca8;background:#1a4b5f;color:#fff;font-weight:600}.input-hint{color:#5a6c7d;font-size:.85rem;margin-top:5px;display:block}.days-input{grid-column:1/3;background:#fff;border:1px solid #d0ddee;border-radius:8px;padding:8px 10px;box-shadow:0 2px 6px rgba(0,0,0,0.02)}.operation-select{grid-column:3/5;background:#fff;border:1px solid #d0ddee;border-radius:8px;padding:8px 10px;box-shadow:0 2px 6px rgba(0,0,0,0.02)}@media(max-width:768px){.tabs{display:flex;width:100%;flex-wrap:wrap;align-items:center;gap:6px;justify-content:flex-start;margin-bottom:16px}.calculator{padding:16px;margin:16px 0}.tab-btn{padding:9px 10px;font-size:.9rem;flex:1 0 auto;width:auto}.date-inputs{display:flex;flex-wrap:nowrap;gap:6px}.date-input-wrapper{min-width:70px;flex:1;position:relative;background:#fff;padding:3px 5px}.date-input{padding:6px 8px;font-size:.9rem}.date-input:focus{background:#f2f6fc}.date-list{position:absolute;top:100%;left:0;right:0;background:#fff;border:2px solid #1a4b5f;border-radius:8px;max-height:200px;overflow-y:auto;z-index:2000;box-shadow:0 4px 12px rgba(0,0,0,.1)}.date-separator{padding:10px 2px;font-size:.9rem}.results-grid{grid-template-columns:repeat(2,1fr);gap:10px}.calculate-btn{padding:10px 16px;min-width:120px}}@media(max-width:560px){.tabs{flex-wrap:wrap}.tab-btn{flex:1 0 100%;width:100%;text-align:center}}@media(max-width:420px){.tabs{display:flex;width:100%;flex-wrap:wrap;align-items:center;gap:4px;justify-content:flex-start;margin-bottom:14px}.tab-btn{padding:8px 10px;font-size:.88rem;flex:1 0 100%;width:100%;text-align:center}.calculate-btn{padding:8px 12px;font-size:.95rem;min-width:100px}}@media(max-width:360px){.date-inputs{flex-wrap:wrap}.date-input-wrapper{min-width:100%}.results-grid{grid-template-columns:1fr}}.spinner{display:inline-block;width:16px;height:16px;border:2px solid #fff;border-top:2px solid transparent;border-radius:50%;margin-right:6px;animation:spin 0.8s linear infinite}@keyframes spin{100%{transform:rotate(360deg)}}