:root {
    --primary-color: #2F4F4F;
    --secondary-color: #3d5c5c;
    --background-color: #ffffff;
    --text-color: #213547;
    --nav-color: #2F4F4F;
    --header-bg: #ffffff;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.5;
    margin: 0;
    min-height: 100vh;
    background-color: #eddfda;
    color: var(--text-color);
}

.site-header {
    background-color: var(--header-bg);
    padding: 1rem 0;
    border-bottom: 1px solid #eaeaea;
}

.site-title {
    font-size: 2.5rem;
    font-weight: bold;
    text-align: center;
    margin: 0;
    padding: 0.5rem 0;
    color: #1a1a1a;
}

.nav-bar {
    background-color: var(--nav-color);
    padding: 0.5rem 0;
    margin-bottom: 2rem;
}

.container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.calculator-container {
    background: var(--background-color);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.calculator-container h1 {
    font-size: 1.8em;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    text-align: center;
}

.calculation-mode {
    margin-bottom: 2rem;
    text-align: center;
}

.mode-selector {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 0.5rem;
}

.mode-btn {
    background-color: #f1f5f9;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 1rem;
}

.mode-btn.active {
    background-color: var(--primary-color);
    color: white;
}

.calculator-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

label {
    font-weight: 500;
    color: var(--primary-color);
}

input {
    padding: 0.8rem;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    font-size: 16px; /* Better for mobile */
    transition: border-color 0.2s;
    width: 100%;
    box-sizing: border-box;
    -webkit-appearance: none; /* Remove default iOS styling */
    appearance: none;
}

input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(47, 79, 79, 0.1);
}

button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    padding: 1rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
    width: 100%;
    touch-action: manipulation; /* Better touch handling */
}

button:hover {
    background-color: var(--secondary-color);
}

.secondary-btn {
    background-color: #f1f5f9;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.secondary-btn:hover {
    background-color: #e2e8f0;
}

.affiliate-offers {
    border: 1px solid #e2e8f0;
    padding: 1.5rem;
    border-radius: 8px;
    background-color: #f8fafc;
}

.affiliate-offers h3 {
    margin-top: 0;
    color: var(--primary-color);
}

.offer-entry {
    background-color: white;
    padding: 1.5rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    border: 1px solid #e2e8f0;
}

.remove-offer {
    background-color: #ef4444;
    padding: 0.5rem 1rem;
    margin-top: 1rem;
}

.remove-offer:hover {
    background-color: #dc2626;
}

.results {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid #e2e8f0;
}

.results h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    text-align: center;
}

.result-numbers {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.result-item {
    text-align: center;
    padding: 1rem;
    background: #f8fafc;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
}

.result-item span {
    display: block;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.result-item label {
    font-size: 0.9rem;
    color: var(--secondary-color);
}

.affiliate-breakdown {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid #e2e8f0;
}

.breakdown-item {
    background: #f8fafc;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    border: 1px solid #e2e8f0;
}

.breakdown-item h4 {
    margin: 0 0 0.5rem 0;
    color: var(--primary-color);
}

.breakdown-item p {
    margin: 0.25rem 0;
    color: var(--secondary-color);
}

.hidden {
    display: none;
}

@media (max-width: 640px) {
    .container {
        padding: 0.5rem;
        margin: 1rem auto;
    }
    
    .calculator-container {
        padding: 1rem;
    }
    
    .site-title {
        font-size: 1.8rem;
    }
    
    .calculator-container h1 {
        font-size: 1.5em;
    }
    
    .mode-selector {
        flex-direction: column;
    }
    
    .mode-btn {
        width: 100%;
        padding: 0.8rem;
    }

    .input-group label {
        font-size: 0.95rem;
    }

    .input-group input {
        padding: 0.7rem;
    }

    .affiliate-offers {
        padding: 1rem;
    }

    .offer-entry {
        padding: 1rem;
    }

    .result-numbers {
        grid-template-columns: 1fr;
    }

    .result-item {
        padding: 0.8rem;
    }

    .breakdown-item {
        padding: 0.8rem;
    }
}

/* For very small screens */
@media (max-width: 360px) {
    .container {
        padding: 0.25rem;
    }
    
    .calculator-container {
        padding: 0.8rem;
    }
    
    .site-title {
        font-size: 1.5rem;
    }
}

.directory-section {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid #e2e8f0;
}

.directory-section h2 {
    color: #2f4f4f;
    text-align: center;
    margin-bottom: 2rem;
}

.directory-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.directory-item {
    text-align: center;
}

.directory-item a {
    color: #ffffff;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
    display: block;
    padding: 1rem;
    background: #2f4f4f;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
}

.directory-item a:hover {
    color: var(--secondary-color);
    background: #f1f5f9;
}

@media (max-width: 640px) {
    .directory-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .directory-item a {
        padding: 0.8rem;
    }
}