:root {
    --main-green: #00525d;
    --secondary-green: #025964;
    --main-white: #f1f1f1;
    --font: rgb(75, 75, 75);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Merriweather', sans-serif;
}

header {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 80px;
    background-color: var(--main-green);
    color: var(--main-white);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2), 0 6px 12px rgba(0, 0, 0, 0.19);
    text-align: center;
}

header h1 {
    font-weight: 400;
}

main {
    width: 100%;
    padding: 2rem 0;
}

.calculator-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem;
    background-color: var(--secondary-green);
    color: var(--main-white);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2), 0 6px 12px rgba(0, 0, 0, 0.19);
    border-radius: 8px;
    margin: 1rem auto;
    width: 90%;
    max-width: 800px;
}

.calculator-section .caption-calculator {
    padding-bottom: 2rem;
}

.input-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.input-container input {
    width: 100%;
    max-width: 350px;
    height: 3rem;
    padding-left: 8px;
    font-size: 1rem;
    color: var(--secondary-green);
    border-radius: 8px;
    border: 2px solid var(--main-green);
    background-color: var(--main-white);
}

.input-container label {
    width: 70%;
}

.input-container button {
    width: 13rem;
    height: 3rem;
    background-color: var(--main-white);
    border: 2px solid var(--main-green);
    border-radius:8px;
    font-weight: 600;
    font-size: 16px;
    color: var(--main-green);
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.input-container button:hover {
    background-color: var(--secondary-green);
    border: 2px var(--main-white) solid;
    color: var(--main-white);
}

.calculator-section h2 {
    padding-bottom: 0.5rem;
}

.calculator-section ul {
    font-size: 24px;
}

.explanation-container {
    padding: 2rem;
    color: var(--font);
    max-width: 800px;
    margin: 2rem auto;
    text-align: center;
}

.explanation-container h2, 
.explanation-container h3 {
    padding-bottom: 1rem;
    color: var(--secondary-green);
}

.explanation-container p,
.explanation-container ul {
    font-size: 16px;
    text-align: left;
    line-height: 1.6;
}

.explanation-container ol,
.explanation-container ul {
    list-style-type: disc;
    
    display: flex;
    align-items: start;
    justify-content: center;
    flex-direction: column;
}

.image-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 2rem 0;
}

.image-container img {
    width: 100%;
    max-width: 18rem;
    height: auto;
    border-radius: 8px;
}

.faq-section {
    padding: 2rem;
    background-color: var(--main-white);
    color: var(--font);
    margin: 2rem auto;
    max-width: 800px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.faq-section h2 {
    color: var(--secondary-green);
    text-align: center;
    margin-bottom: 1rem;
}

.faq-section h3 {
    font-size: 1.2rem;
    margin-top: 1.5rem;
    color: var(--main-green);
}

.faq-section p {
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.additional-info-section {
    background-color: var(--main-white);
    color: var(--font);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    margin: 2rem auto;
    max-width: 800px;
}

.additional-info-section h2 {
    color: var(--secondary-green);
    text-align: center;
    margin-bottom: 1rem;
}

.additional-info-section p {
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 1rem;
    text-align: justify;
}

.additional-info-section ul {
    list-style-type: disc;
    padding-left: 2rem;
    font-size: 1rem;
    color: var(--font);
}

footer {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background-color: var(--main-green);
    color: var(--main-white);
    text-align: center;
    font-size: 0.9rem;
}

footer a {
    color: var(--main-white);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .calculator-section, .explanation-container, .faq-section {
        width: 90%;
        padding: 1.5rem;
    }

    .input-container {
        flex-direction: column;
    }

    .input-container input,
    .input-container button {
        width: 100%;
        max-width: 100%;
        border-radius: 8px;
        margin-bottom: 0.5rem;
    }

    .explanation-container p,
    .explanation-container ul {
        padding: 0 1rem;
        font-size: 0.9rem;
    }

    .image-container {
        flex-direction: column;
        padding: 1rem 0;
    }

    .faq-section h2, 
    .faq-section h3 {
        font-size: 1.1rem;
    }
}

@media (max-width: 480px) {
    header {
        height: 60px;
    }

    header h1 {
        font-size: 1.2rem;
    }

    .input-container input, .input-container button {
        height: 2.5rem;
    }

    .explanation-container p,
    .explanation-container ul {
        font-size: 0.85rem;
    }

    .faq-section p {
        font-size: 0.9rem;
    }

    footer {
        font-size: 0.8rem;
    }
}