BTU Heatload Calculator

.calc-header { margin-bottom: 30px; padding: 25px; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); border-radius: 12px; box-shadow: 0 4px 6px rgba(0,0,0,0.1); color: white; } .calc-header h2 { margin-top: 0; color: white; font-size: 28px; margin-bottom: 10px; } .calc-header p { margin: 10px 0; opacity: 0.95; font-size: 15px; } .input-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 15px; margin-top: 20px; } .input-group { display: flex; flex-direction: column; } .input-group label { margin-bottom: 8px; font-weight: 600; color: white; font-size: 14px; } .input-group input { padding: 12px; font-size: 16px; border: 2px solid rgba(255,255,255,0.3); border-radius: 6px; font-family: 'Courier New', monospace; background: rgba(255,255,255,0.95); transition: all 0.3s ease; } .input-group input:focus { outline: none; border-color: #4CAF50; background: white; box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1); } .button-container { margin-top: 20px; display: flex; gap: 10px; } .calc-button { padding: 14px 35px; font-size: 16px; background: #4CAF50; color: white; border: none; border-radius: 6px; cursor: pointer; font-weight: bold; transition: all 0.3s ease; box-shadow: 0 2px 4px rgba(0,0,0,0.2); } .calc-button:hover { background: #45a049; transform: translateY(-1px); box-shadow: 0 4px 8px rgba(0,0,0,0.3); } .calc-button:active { background: #3d8b40; transform: translateY(0); } .help-text { margin-top: 15px; font-size: 14px; color: rgba(255,255,255,0.9); background: rgba(0,0,0,0.1); padding: 10px 15px; border-radius: 4px; } .help-text strong { color: white; } .results { margin-top: 30px; display: none; } .results.show { display: block; } .result-section { background: white; border: 1px solid #e0e0e0; border-radius: 8px; margin-bottom: 15px; overflow: hidden; box-shadow: 0 2px 4px rgba(0,0,0,0.05); transition: all 0.3s ease; } .result-section:hover { box-shadow: 0 4px 8px rgba(0,0,0,0.1); } .section-header { background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%); color: white; padding: 15px 20px; display: flex; justify-content: space-between; align-items: center; user-select: none; } .section-header h3 { margin: 0; font-size: 18px; display: flex; align-items: center; gap: 10px; } .section-header .icon { font-size: 20px; } .section-content { padding: 20px; background: #fafafa; } .data-row { display: flex; margin: 12px 0; padding: 10px; background: white; border-radius: 4px; border-left: 3px solid #4CAF50; } .data-label { font-weight: bold; color: #555; min-width: 220px; flex-shrink: 0; } .data-value { color: #333; font-family: 'Courier New', monospace; word-break: break-word; } .data-value.highlight { color: #4CAF50; font-weight: bold; font-size: 18px; } .info-box { background: #e3f2fd; color: #1565c0; padding: 15px 20px; border-radius: 8px; border-left: 4px solid #2196F3; margin: 20px 0; font-size: 14px; } .info-box strong { color: #0d47a1; } .warning { background: #fff3e0; color: #e65100; padding: 15px 20px; border-radius: 8px; border-left: 4px solid #ff9800; margin: 20px 0; } /* Responsive design */ @media (max-width: 768px) { .input-grid { grid-template-columns: 1fr; } .button-container { flex-direction: column; } .calc-button { width: 100%; } .data-row { flex-direction: column; } .data-label { margin-bottom: 5px; min-width: auto; } }