/* HVAC Duct Sizing Calculator CSS */
.hvac-calculator-container * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

.hvac-calculator-container {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #F5F5F5;
    color: #222222;
    line-height: 1.6;
    padding: 20px;
    min-height: 100vh;
}

.hvac-calculator-container .container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    max-width: 1600px;
    margin: 0 auto;
}

@media (min-width: 1024px) {
    .hvac-calculator-container .container {
        grid-template-columns: 1fr 1fr;
    }
}

.hvac-calculator-container .panel {
    background-color: #E0E0E0;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.08);
}

.hvac-calculator-container .panel-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 3px solid #4A90E2;
}

.hvac-calculator-container .panel-title h2 {
    color: #222222;
    font-size: 1.8rem;
    font-weight: 600;
}

.hvac-calculator-container .colorblind-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    background: #F5F5F5;
    color: #222222;
    border: 2px solid #333;
    border-radius: 6px;
    padding: 8px 16px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s;
    white-space: nowrap;
}

.hvac-calculator-container .colorblind-toggle:hover {
    background: #E0E0E0;
}

.hvac-calculator-container .form-grid {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.hvac-calculator-container .form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.hvac-calculator-container .form-group label {
    font-weight: 600;
    color: #222222;
}

.hvac-calculator-container .unit-selector {
    font-size: 0.85rem;
    background: #F5F5F5;
    border: 1px solid #333;
    border-radius: 4px;
    padding: 2px 6px;
    margin-left: 8px;
}

.hvac-calculator-container .input-hint {
    font-size: 0.85rem;
    color: #555;
    font-style: italic;
    margin-bottom: 4px;
}

.hvac-calculator-container input,
.hvac-calculator-container select {
    height: 48px;
    padding: 12px 16px;
    border: 2px solid #333;
    border-radius: 8px;
    background-color: #ffffff;
    font-size: 1rem;
    color: #222222;
    transition: all 0.2s;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

.hvac-calculator-container input:focus,
.hvac-calculator-container select:focus {
    outline: 3px solid #4A90E2;
    outline-offset: 2px;
    background-color: #ffffff;
}

.hvac-calculator-container input[type="number"] {
    -moz-appearance: textfield;
}

.hvac-calculator-container input[type="number"]::-webkit-outer-spin-button,
.hvac-calculator-container input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.hvac-calculator-container .button-group {
    display: flex;
    gap: 15px;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #ccc;
    flex-wrap: wrap;
}

.hvac-calculator-container button {
    height: 48px;
    padding: 0 28px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-width: 140px;
}

.hvac-calculator-container .btn-calculate {
    background-color: #4A90E2;
    color: white;
}

.hvac-calculator-container .btn-calculate:hover {
    background-color: #357ABD;
}

.hvac-calculator-container .btn-reset {
    background-color: #FF9500;
    color: #222222;
}

.hvac-calculator-container .btn-reset:hover {
    background-color: #E68500;
}

.hvac-calculator-container .btn-export {
    background-color: #222222;
    color: white;
}

.hvac-calculator-container .btn-export:hover {
    background-color: #444444;
}

.hvac-calculator-container .results-container {
    display: none;
}

.hvac-calculator-container .results-container.visible {
    display: block;
}

.hvac-calculator-container .result-section {
    background: white;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    border-left: 5px solid #4A90E2;
}

.hvac-calculator-container .result-title {
    color: #222222;
    margin-bottom: 15px;
    font-size: 1.4rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.hvac-calculator-container .result-title svg {
    width: 24px;
    height: 24px;
}

.hvac-calculator-container .result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.hvac-calculator-container .result-item {
    background: #F5F5F5;
    padding: 15px;
    border-radius: 6px;
    border: 1px solid #ddd;
}

.hvac-calculator-container .result-label {
    font-size: 0.9rem;
    color: #555;
    margin-bottom: 5px;
}

.hvac-calculator-container .result-value {
    font-size: 1.2rem;
    font-weight: 600;
    color: #222222;
}

.hvac-calculator-container .result-unit {
    font-size: 0.9rem;
    color: #777;
    margin-left: 4px;
}

.hvac-calculator-container .step-calculation {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 6px;
    margin-bottom: 15px;
    border-left: 4px solid #FF9500;
    font-family: 'Courier New', monospace;
    white-space: pre-wrap;
    word-break: break-word;
}

.hvac-calculator-container .analysis-box {
    background: #e8f4fd;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
    border: 1px solid #4A90E2;
}

.hvac-calculator-container .recommendation-box {
    background: #fff8e6;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
    border: 1px solid #FF9500;
}

.hvac-calculator-container .comment-box {
    background: #f0f0f0;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
    border: 1px solid #222222;
}

.hvac-calculator-container .svg-container {
    background: white;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
    border: 2px solid #333;
}

.hvac-calculator-container .svg-diagram {
    width: 100%;
    height: 300px;
    background: #F5F5F5;
    border-radius: 4px;
    overflow: visible;
}

.hvac-calculator-container .trademark {
    position: fixed;
    bottom: 20px;
    right: 20px;
    font-size: 0.9rem;
    color: #777;
    background: #E0E0E0;
    padding: 6px 12px;
    border-radius: 4px;
    z-index: 1000;
}

.hvac-calculator-container .disclaimer {
    background: #ffebee;
    padding: 15px;
    border-radius: 8px;
    margin: 30px 0;
    border: 2px solid #d32f2f;
    font-size: 0.9rem;
    color: #222222;
    text-align: center;
}

.hvac-calculator-container .error-message {
    background: #ffebee;
    color: #c62828;
    padding: 12px;
    border-radius: 6px;
    margin: 15px 0;
    border: 1px solid #ef9a9a;
    display: none;
}

.hvac-calculator-container .error-message.visible {
    display: block;
}

/* Colorblind mode adaptations */
.hvac-calculator-container.colorblind-mode {
    background-color: #F5F5F5 !important;
}

.hvac-calculator-container.colorblind-mode .btn-calculate {
    background-color: #222222;
    color: white;
    border: 2px solid #333;
}

.hvac-calculator-container.colorblind-mode .btn-reset {
    background-color: #666666;
    color: white;
    border: 2px solid #333;
}

.hvac-calculator-container.colorblind-mode .btn-export {
    background-color: #333333;
    color: white;
    border: 2px dashed #333;
}

.hvac-calculator-container.colorblind-mode input,
.hvac-calculator-container.colorblind-mode select {
    border: 3px solid #333;
    background: #ffffff;
}

.hvac-calculator-container.colorblind-mode .result-section {
    border-left: 5px solid #333;
}

.hvac-calculator-container.colorblind-mode .analysis-box {
    border: 2px solid #333;
    background: #ffffff;
}

.hvac-calculator-container.colorblind-mode .recommendation-box {
    border: 2px dashed #333;
    background: #f0f0f0;
}

.hvac-calculator-container.colorblind-mode .step-calculation {
    border-left: 4px solid #666;
}

.hvac-calculator-container.colorblind-mode .svg-container {
    border: 2px solid #333;
}

.hvac-calculator-container.colorblind-mode .panel-title {
    border-bottom: 3px solid #333;
}

/* Mobile optimizations */
@media (max-width: 768px) {
    .hvac-calculator-container .panel {
        padding: 15px;
    }

    .hvac-calculator-container .panel-title {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

    .hvac-calculator-container .colorblind-toggle {
        align-self: flex-start;
    }

    .hvac-calculator-container .form-grid {
        grid-template-columns: 1fr;
    }

    .hvac-calculator-container .button-group {
        flex-direction: column;
    }

    .hvac-calculator-container button {
        width: 100%;
        min-width: unset;
    }

    .hvac-calculator-container .result-grid {
        grid-template-columns: 1fr;
    }

    .hvac-calculator-container .trademark {
        position: static;
        text-align: center;
        margin-top: 20px;
    }
}

/* Ensure select options are visible */
.hvac-calculator-container select option {
    padding: 12px;
    font-size: 14px;
    height: 40px;
    line-height: 40px;
    background-color: white;
}

/* Improved input visibility */
.hvac-calculator-container input::placeholder {
    color: #666;
    opacity: 0.7;
}

.hvac-calculator-container input:not(:placeholder-shown) {
    background-color: #ffffff;
    color: #222222;
}

/* Fix for select dropdowns */
.hvac-calculator-container select {
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23222222' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: 40px;
}