:root{--primary: #2e3fb1;--border-color: #e2e8f0;--text-main: #1e293b;--text-muted: #64748b;--input-bg: #e0f2fe;--btn-calculate-bg: #1e293b;--result-box-bg: #e0f2fe}.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-card-title{text-align:center;padding:20px 24px}.calc-main-title{font-size:1.25rem;font-weight:700;color:var(--text-main);margin:0}.form-group{margin-bottom:16px}.form-group:last-child{margin-bottom:0}.form-group label{display:block;font-size:.875rem;font-weight:500;margin-bottom:6px;color:var(--text-main)}.date-input-wrapper{position:relative}.date-input{width:100%;padding:10px 14px 10px 12px;border:1px solid var(--border-color);border-radius:10px;font-size:1rem;background:var(--input-bg);color:var(--text-main)}.date-input:focus{outline:none;border-color:var(--primary)}.date-input::-webkit-calendar-picker-indicator{cursor:pointer;opacity:.7}.period-row{margin-bottom:16px}.period-row:last-of-type{margin-bottom:0}.period-inputs{display:grid;grid-template-columns:1fr 1fr;gap:16px}@media (max-width: 576px){.period-inputs{grid-template-columns:1fr}}.add-period-wrap{margin-top:16px;padding-top:16px;border-top:1px solid var(--border-color)}.btn-add-period{background:none;border:none;color:var(--primary);font-size:.9rem;font-weight:500;cursor:pointer;padding:0;text-decoration:none}.btn-add-period:hover{text-decoration:underline}.calc-actions{display:flex;justify-content:center;padding:20px 24px}.btn-calculate{display:inline-block;padding:14px 40px;background:var(--btn-calculate-bg);color:#fff;border:none;border-radius:10px;font-size:1rem;font-weight:600;cursor:pointer}.btn-calculate:hover{background:#334155}.calc-result{background:#fff;border:1px solid var(--border-color);border-radius:12px;padding:24px;text-align:center}.calc-result .result-label{font-size:.95rem;color:var(--text-main);margin-bottom:16px}.result-boxes{display:flex;flex-wrap:wrap;justify-content:center;gap:12px}.result-box{display:flex;flex-direction:column;align-items:center;justify-content:center;min-width:100px;padding:16px 20px;background:var(--result-box-bg);border-radius:10px;border:1px solid #bae6fd}.result-box .result-value{font-size:1.5rem;font-weight:700;color:var(--text-main);line-height:1.2}.result-box .result-unit{font-size:.8rem;color:var(--text-muted);margin-top:4px}.result-error{font-size:.875rem;color:#dc2626;margin-top:12px}.calc-info{font-size:.85rem;color:var(--text-muted);margin-top:16px;padding-top:16px;border-top:1px solid var(--border-color)}