body {
    font-family: 'Roboto', Arial, sans-serif;
    background-color: #1c1c1e;
    margin: 0;
    padding: 20px;
    color: #ffffff;
    font-size: 16px;
    text-shadow: 
    -1px -1px 0 #000,  
     1px -1px 0 #000,  
    -1px  1px 0 #000,  
     1px  1px 0 #000; /* Adjust line height for better readability */
}

.container {
    max-width: 700px;
    margin: 0 auto;
    background: #2a2a2e;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

header {
    text-align: center;
    margin-bottom: 30px;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.header-logo {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

h1 {
    font-family: 'Montserrat', sans-serif;
    color: #0088ff;
    font-size: 2.0em;
    margin: 0;
    text-shadow: 
        -1px -1px 0 #000,  
         1px -1px 0 #000,  
        -1px  1px 0 #000,  
         1px  1px 0 #000,
         0 0 5px #18FC50,
         0 0 10px #18FC50;
}

.subtitle {
    color: #ffffff;
    font-size: 1.3em;
    margin-top: 2px;
    margin-left: 47px; /* Adjusted to align with the logo */
    font-weight: 500;
    text-shadow: 
    -1px -1px 0 #000,  
     1px -1px 0 #000,  
    -1px  1px 0 #000,  
     1px  1px 0 #000;
}

.calculator-form {
    background: #333337;
    padding: 20px;
    border-radius: 8px;
}

.input-section {
    margin-bottom: 20px;
}

h2 {
    font-family: 'Montserrat', sans-serif;
    color: #ffffff;
    font-size: 1.2em;
    margin: 0 0 15px;
    border-bottom: 2px solid #0088ff;
    padding-bottom: 5px;
    text-align: center;
    width: 100%;
    text-shadow: 
    -1px -1px 0 #000,  
     1px -1px 0 #000,  
    -1px  1px 0 #000,  
     1px  1px 0 #000;
}

.input-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.input-group {
    display: flex;
    flex-direction: column;
}

label {
    font-weight: 600;
    margin-bottom: 5px;
    color: #ffffff;
    font-size: 1.0em;
    text-shadow: 
    -1px -1px 0 #000,  
     1px -1px 0 #000,  
    -1px  1px 0 #000,  
     1px  1px 0 #000;
}

input {
    padding: 10px;
    border: 1px solid #4a4a4e;
    border-radius: 6px;
    font-size: 1.0em;
    background: #3a3a3e;
    color: #ffffff;
    transition: border-color 0.3s;
    text-shadow: 
    -1px -1px 0 #000,  
     1px -1px 0 #000,  
    -1px  1px 0 #000,  
     1px  1px 0 #000;
}

input:focus {
    border-color: #0088ff;
    outline: none;
}

.accuracy-range .range-inputs {
    display: flex;
    gap: 10px;
}

.accuracy-range input {
    width: 100%;
}

.tooltip {
    cursor: help;
    color: #0088ff;
    font-weight: bold;
    margin-left: 5px;
    text-shadow: 
    -1px -1px 0 #000,  
     1px -1px 0 #000,  
    -1px  1px 0 #000,  
     1px  1px 0 #000;
}

.button-group {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

button {
    padding: 12px;
    border: 2px solid #000000;
    border-radius: 6px;
    font-size: 1.2em;
    text-transform: uppercase;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.1s;
    font-family: 'Montserrat', sans-serif;
    text-shadow: 
    -1px -1px 0 #000,  
     1px -1px 0 #000,  
    -1px  1px 0 #000,  
     1px  1px 0 #000;
}

button.calculate-btn {
    background-color: #0088ff;
    color: #ffffff;
    flex: 2;
    text-shadow: 
    -1px -1px 0 #000,  
     1px -1px 0 #000,  
    -1px  1px 0 #000,  
     1px  1px 0 #000;
}

button.calculate-btn:hover {
    background-color: #0066cc;
    transform: translateY(-3px);
}

button.reset-btn {
    background-color: #ff4444;
    color: #ffffff;
    flex: 1;
    text-shadow: 
    -1px -1px 0 #000,  
     1px -1px 0 #000,  
    -1px  1px 0 #000,  
     1px  1px 0 #000;
}

button.reset-btn:hover {
    background-color: #cc3333;
    transform: translateY(-3px);
}

.results-section {
    margin-top: 30px;
    padding: 20px;
    background: #3a3a3e;
    border-radius: 8px;
    opacity: 0;
    transition: opacity 0.5s;
}

.results-section.visible {
    opacity: 1;
}

.results-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 10px;
}

.results-grid p {
    margin: 8px 0;
    font-size: 1.0em;
}

.results-grid span {
    font-weight: bold;
    color: #ffffff;
    text-shadow: 
    -1px -1px 0 #000,  
     1px -1px 0 #000,  
    -1px  1px 0 #000,  
     1px  1px 0 #000;
    font-size: 1.0em;
}

.results-grid span.negative {
    color: #ff4444;
}

.viability-text {
    grid-column: span 2;
    font-style: italic;
    font-size: 1.0em;
    font-weight: bold;
    margin-top: 10px;
    text-shadow: 
    -1px -1px 0 #000,  
     1px -1px 0 #000,  
    -1px  1px 0 #000,  
     1px  1px 0 #000;
}

.charts {
    margin-top: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.sensitivity-analysis {
    margin-top: 20px;
}

.sensitivity-analysis h3 {
    font-family: 'Montserrat', sans-serif;
    color: #ffffff;
    font-size: 1.1em;
    margin-bottom: 10px;
    text-shadow: 
    -1px -1px 0 #000,  
     1px -1px 0 #000,  
    -1px  1px 0 #000,  
     1px  1px 0 #000;
}

.sensitivity-analysis label {
    display: block;
    margin-bottom: 10px;
    text-shadow: 
    -1px -1px 0 #000,  
     1px -1px 0 #000,  
    -1px  1px 0 #000,  
     1px  1px 0 #000;
}

.sensitivity-analysis input[type="range"] {
    width: 100%;
}

button.export-btn {
    background-color: #18FC50;
    color: #ffffff;
    width: 100%;
    margin-top: 20px;
    padding: 12px;
    text-shadow: 
    -1px -1px 0 #000,  
     1px -1px 0 #000,  
    -1px  1px 0 #000,  
     1px  1px 0 #000;
}

button.export-btn:hover {
    background-color: #14D744;
    transform: translateY(-3px);
}