.converter-container{display:flex;gap:2rem;margin-top:1.5rem;flex-wrap:wrap;align-items:flex-start}.converter-box{flex:1;min-width:300px;background-color:#f8f9fa;padding:1.5rem;border-radius:8px;border:1px solid #dee2e6;box-shadow:0 1px 2px rgba(16,24,40,.04);transition:transform .15s ease,box-shadow .15s ease}.converter-box:hover{transform:translateY(-2px);box-shadow:0 6px 16px rgba(16,24,40,.08)}.converter-box h3{margin-top:0;color:#111827;margin-bottom:.75rem;font-size:1.1rem}.input-group{margin-bottom:1rem}.input-group label{display:block;margin-bottom:.5rem;font-weight:600;color:#495057}.btn-primary,input,select{border-radius:4px;font-size:1rem}input,select{width:100%;padding:.8rem;margin-bottom:1rem;border:1px solid #ced4da;background-color:#fff}.btn-primary{background-color:#1a2a6c;color:#fff;border:0;padding:.8rem 1.5rem;cursor:pointer;transition:background-color .3s ease}.btn-primary:hover{background-color:#2c3e50}.result-box{margin-top:1rem;padding:1rem;background-color:#e7f3ff;border-radius:4px;min-height:50px;display:none;flex-direction:column;align-items:center;justify-content:center;font-weight:700;color:#1a2a6c;gap:.8rem}.result-box.visible{display:flex}.result-line{display:flex;justify-content:space-between;align-items:center;width:100%}#current-julian-date-display,.copy-btn{display:flex;align-items:center;justify-content:center}.copy-btn{background:0 0;border:1px solid #adb5bd;border-radius:4px;padding:.2rem .4rem;cursor:pointer;font-size:.9rem;transition:all .2s ease;margin-left:.5rem;min-width:1.8rem;height:1.8rem;color:#1a2a6c}.copy-btn:hover{background-color:#e9ecef;border-color:#1a2a6c;transform:scale(1.1)}.copy-btn svg{width:18px;height:18px;display:block}.faq,.user-guide{margin-top:2rem}.two-column{display:flex;gap:2rem}.column{flex:1}#current-julian-date-display{margin-top:.25rem;font-size:1.1rem;font-weight:500;opacity:.9;gap:.5rem}#header-current-julian{font-weight:700;font-family:"Courier New",Courier,monospace;color:#fff}#copy-current-julian-btn{background-color:rgba(255,255,255,.2);border:1px solid rgba(255,255,255,.3);color:#fff;padding:.3rem .5rem;border-radius:4px;cursor:pointer;font-size:1rem;transition:all .2s ease;min-width:2rem;height:2rem;display:flex;align-items:center;justify-content:center}#copy-current-julian-btn:hover{background-color:rgba(255,255,255,.3);border-color:rgba(255,255,255,.5);transform:scale(1.1)}@media (max-width:768px){.converter-container,.two-column{flex-direction:column}}@media (max-width:480px){.converter-box{padding:1rem}h1{font-size:1.8rem}.btn-primary,input,select{padding:.7rem 1.2rem;font-size:.9rem}input,select{padding:.7rem}}