body { 
    font-family: 'Comfortaa', sans-serif; 
    margin: 10px; 
    line-height: 1.5; 
    transition: background-color 0.3s, color 0.3s; }

body.dark-theme { 
    background-color: #333; 
    color: #fff; }
body.dark-theme .container, body.dark-theme #result, body.dark-theme #heaters-selection, body.dark-theme #email-section, body.dark-theme #calculation-summary { 
    background-color: #444; 
    border-color: #555; }
body.dark-theme input, body.dark-theme select { 
    background-color: #555; 
    color: #fff; 
    border-color: #666; }
body.dark-theme button { 
    background-color: #B05403; }

button { 
    padding: 12px 20px; 
    background-color: #F09D03; 
    color: white; border: none; 
    border-radius: 10px; cursor: pointer; 
    margin: 5px 0; 
    font-family: 'Comfortaa', sans-serif; }
input[type="number"], 
select { width: 100%; 
    padding: 10px; 
    border: 1px solid #ddd; 
    border-radius: 3px; 
    box-sizing: border-box; 
    font-size: 1em; 
    font-family: 'Comfortaa', sans-serif; }

.container { max-width: 95%; margin: 10px auto; padding: 15px; border: 1px solid #ccc; border-radius: 5px; }
.form-group, .form-group-inline { margin-bottom: 10px; }
.form-group-inline { display: flex; align-items: center; }
.form-group label, .form-group-inline label { display: block; margin-bottom: 3px; font-weight: bold; font-size: 0.9em; }
.form-group-inline label { width: 250px; margin-right: 10px; text-align: left; }
.summary-section { margin-bottom: 20px; }
.summary-section h3 { font-size: 1.2em; margin-bottom: 10px; color: #333; }
.company-details { font-size: 0.9em; color: #555; }
.fade-in { animation: fadeIn 0.5s ease-in; }
.form-group-inline input[type="number"], .form-group-inline select { flex-grow: 1; width: auto; padding: 8px; }
.error-input { border: 2px solid red !important; }
.error-message { color: red; font-size: 0.9em; margin-top: 3px; }
.error-text { color: red; }
.success-text { color: green; }
.spaced-button { margin-right: 10px; }
.form-group-inline button:last-child { margin-right: 0; }
.heater-select { margin-bottom: 10px; padding: 10px; border: 1px solid #eee; background-color: #fff; }
.remove-heater { background-color: #dc3545; padding: 5px 10px; }

#input-data-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; font-size: 0.9em; }
#input-data-grid p { margin: 0; }
#heaters-table { width: 100%; border-collapse: collapse; margin-bottom: 10px; }
#heaters-table th, #heaters-table td { border: 1px solid #ddd; padding: 8px; text-align: left; font-size: 0.9em; }
#heaters-table th { background-color: #f2f2f2; font-weight: bold; }
#languageSelect { width: 120px; padding: 5px; font-size: 0.9em; margin-right: 15px; }
#languageLabel { font-size: 0.9em; margin-right: 5px; }
#calculation-summary { padding: 20px; background: #fff; border: 1px solid #ddd; border-radius: 5px; }
#result, #heaters-selection, #email-section, #calculation-summary { margin-top: 15px; padding: 15px; border: 1px solid #eee; border-radius: 3px; background-color: #f9f9f9; display: none; }
#result {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 20px;
  }
  #result-text {
    flex: 3;
    min-width: 320px;
  }
  #result-chart {
    flex: 1;
    min-width: 250px;
    max-width: 30%;
  }
#result-chart { margin: 20px 0; max-width: 100%; }
#heatLossChart {
    width: 100% !important;
    height: 300px !important;
  }

@media (max-width: 767.98px) {
    #input-data-grid { grid-template-columns: 1fr; }
    #heaters-table th, #heaters-table td { font-size: 0.8em; padding: 5px; }
}
@media (max-width: 767.98px) {
    .container { max-width: 100%; padding: 10px; margin: 0; }
    .form-group-inline { flex-direction: column; align-items: flex-start; }
    .form-group-inline label { width: 100%; margin-bottom: 5px; }
    .form-group-inline input[type="number"], .form-group-inline select { width: 100%; }
    button { width: 100%; }
}
@media (min-width: 769px) {
    #result-chart { display: block; }
    #result { margin-top: 20px; }
}
@media (max-width: 768px) {
        #calculateButton { order: 0; width: 100%; margin-bottom: 10px; }
    #result {
        flex-direction: column;
      }
      #result-chart {
        max-width: 100%;
        margin-top: 20px;
      }
    body { display: flex; flex-direction: column; }
    #heatLossChart { height: 250px !important; }
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.summary-section,
#result,
#heaters-selection,
#email-section,
#calculation-summary {
    display: none;
}
#calculation-summary.fade-in {
    animation: fadeIn 0.7s ease-in-out;
}
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
.summary-section.active,
#result.active,
#heaters-selection.active,
#email-section.active,
#calculation-summary.active {
    display: block;
}
.summary-columns {
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
}
.summary-columns ul {
    flex: 1 1 300px;
    list-style: none;
    padding-left: 0;
}
.summary-title {
    font-size: 1.3em;
    margin-bottom: 10px;
}
.error-text {
    color: red;
    font-weight: bold;
}
#summary-heaters-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 15px;
}

#summary-heaters-table th,
#summary-heaters-table td {
    border: 1px solid #999;
    padding: 6px 8px;
    text-align: center;
}
#summary-heaters-table {
    border: 1px solid #ccc;
    box-shadow: 1px 1px 5px rgba(0,0,0,0.05);
}
#summary-heaters-table th {
    white-space: normal;
    text-align: center;
    word-break: break-word;
    font-weight: 600;
    font-size: 14px;
    max-width: 120px; /* обмеження ширини */
}
.success-text {
    color: green;
    font-weight: bold;
}
body.dark-theme .heater-select {
    background-color: #444;
    border-color: #666;
    color: #fff;
}

body.dark-theme .heater-select select,
body.dark-theme .heater-select input[type="number"] {
    background-color: #555;
    color: #fff;
    border-color: #777;
}
input[type="text"],
input[type="number"] {
  font-family: inherit;
  font-size: 1rem;
  padding: 0.5em;
  border: 1px solid #ccc;
  border-radius: 4px;
  width: 100%;
  box-sizing: border-box;
}
input[type="text"],
input[type="number"],
select {
  font-family: inherit;
  font-size: 1rem;
  padding: 0.5em;
  border: 1px solid #ccc;
  border-radius: 4px;
  width: 100%;
  box-sizing: border-box;
  background-color: white;
  color: #000;
}
body.dark-theme .heater-select button {
    background-color: #B05403;
    color: white;
}
.dark-theme #calculation-summary h3 {
    color: #fff;
}
h3, h2, .summary-title {
    transition: color 0.3s ease-in-out;
}
@media (max-width: 768px) {
    #summary-heaters-table,
    #summary-heaters-table thead,
    #summary-heaters-table tbody,
    #summary-heaters-table th,
    #summary-heaters-table td,
    #summary-heaters-table tr {
        display: block;
    }

    #summary-heaters-table thead tr {
        display: none;
    }

    #summary-heaters-table td {
        position: relative;
        padding-left: 50%;
        text-align: left;
        border: 1px solid #999;
    }

    #summary-heaters-table td::before {
        position: absolute;
        top: 8px;
        left: 8px;
        width: 45%;
        white-space: normal;
        font-weight: bold;
        content: attr(data-label);
    }

    #summary-heaters-table tr {
        margin-bottom: 10px;
        border-bottom: 2px solid #ccc;
    }
}
@media (min-width: 992px) {
    #result {
        display: flex;
        justify-content: space-between;
        align-items: flex-start;
    }

    #result-text {
        flex: 3;
        margin-right: 20px;
    }

    #result-chart {
        flex: 1;
        max-width: 30%;
    }
}
/* Для темної теми */
body.dark-theme #summary-heater-power-message {
    color: rgb(224, 99, 99);
    transition: color 0.3s ease-out; /* Плавне світлішання */
}

/* Після перевірки потужності */
body.dark-theme .success-text {
    color: #4caf50; /* Світліший зелений для успіху */
}