* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: #000000;
    color: #fff;
    line-height: 1.6;
    padding: 40px 20px;
    min-height: 100vh;
}

.calculator-container {
    max-width: 800px;
    margin: 0 auto;
}

.logo-container {
    text-align: center;
    margin-bottom: 40px;
}

.logo {
    max-width: 100px;
    height: auto;
    display: inline-block;
}

.calculator-title {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 40px;
    text-align: center;
}

.calculator-content {
    background-color: #000000;
}

.config-section {
    margin-bottom: 30px;
}

.section-header {
    margin-bottom: 8px;
}

.section-title {
    font-size: 1.25rem;
    font-weight: bold;
    color: #ffffff;
}

.section-description {
    font-size: 0.9rem;
}

.info-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border: 1px solid #ffffff;
    border-radius: 50%;
    font-size: 12px;
    cursor: help;
}

.section-description {
    font-size: 0.9rem;
    color: #ffffff;
    margin-bottom: 20px;
}

.section-divider {
    border: none;
    border-top: 1px solid #333333;
    margin: 30px 0;
}

.input-group {
    display: flex;
    align-items: center;
    gap: 20px;
}

.slider {
    flex: 1;
    height: 6px;
    background-color: #333333;
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background-color: #ffffff;
    border-radius: 50%;
    cursor: pointer;
}

.slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background-color: #ffffff;
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

.input-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
}

.number-input {
    width: 80px;
    padding: 8px 12px;
    background-color: transparent;
    border: 1px solid #ffffff;
    color: #ffffff;
    font-size: 1rem;
    text-align: center;
    -moz-appearance: textfield;
}

.number-input::-webkit-outer-spin-button,
.number-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.number-input:focus {
    outline: 1px solid #ffffff;
    outline-offset: 2px;
}

.unit {
    color: #ffffff;
    font-size: 0.9rem;
}

.model-selector {
    display: flex;
    gap: 12px;
    margin-top: 10px;
    flex-wrap: wrap;
}

.model-option {
    position: relative;
    cursor: pointer;
}

.model-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.model-label {
    display: inline-block;
    padding: 10px 20px;
    border: 1px solid #ffffff;
    background-color: transparent;
    color: #ffffff;
    font-size: 0.95rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
    border-radius: 4px;
    user-select: none;
}

.model-option input[type="radio"]:checked + .model-label {
    background-color: #ffffff;
    color: #000000;
}

.model-option:hover .model-label {
    background-color: rgba(255, 255, 255, 0.1);
}

.model-option input[type="radio"]:checked + .model-label:hover {
    background-color: #ffffff;
    color: #000000;
}

.model-info-section {
    margin-top: 20px;
    margin-bottom: 20px;
}

.model-info-title {
    font-size: 1.2rem;
    font-weight: bold;
    color: #ffffff;
    margin-bottom: 12px;
}

.model-info-description {
    font-size: 0.95rem;
    color: #ffffff;
    opacity: 0.9;
    margin-bottom: 16px;
    line-height: 1.6;
}

.model-info-features {
    list-style: none;
    padding: 0;
    margin: 0;
}

.model-info-features li {
    font-size: 0.9rem;
    color: #ffffff;
    padding: 6px 0;
    padding-left: 20px;
    position: relative;
}

.model-info-features li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: #ffffff;
    font-weight: bold;
}

.model-info-subfeatures {
    list-style: none;
    padding: 0;
    margin: 8px 0 0 0;
    padding-left: 20px;
}

.model-info-subfeatures li {
    font-size: 0.85rem;
    opacity: 0.7;
    padding: 4px 0;
    padding-left: 16px;
    position: relative;
}

.model-info-subfeatures li::before {
    content: '◦';
    position: absolute;
    left: 0;
    color: #ffffff;
}

.options-group {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
}

.checkbox {
    width: 18px;
    height: 18px;
    border: 1px solid #ffffff;
    background-color: transparent;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
    position: relative;
}

.checkbox:checked::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #ffffff;
    font-size: 14px;
    font-weight: bold;
}

.checkbox-text {
    color: #ffffff;
    font-size: 0.95rem;
}

.price-display {
    text-align: right;
    margin-top: 20px;
}

.price-monthly {
    color: #ffffff;
    font-size: 1rem;
    margin-bottom: 8px;
}

.price-yearly {
    color: #ffffff;
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 8px;
}

.price-yearly strong {
    font-weight: bold;
}

.price-note {
    color: #ffffff;
    font-size: 0.85rem;
    opacity: 0.8;
    margin-top: 8px;
}

.export-button {
    width: 100%;
    padding: 15px 30px;
    background-color: #fff;
    color: #000;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease;
    margin-top: 20px;
}

.export-button:hover {
    background-color: #fff;
    opacity: 0.9;
}

.export-button:active {
    background-color: #fff;
    opacity: 0.9;
}

@media (max-width: 600px) {
    .input-group {
        flex-direction: column;
        align-items: stretch;
    }
    
    .input-wrapper {
        justify-content: flex-end;
    }
}