/* ===== General settings ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
:root {
    --primary-color: #4164ff;
    --primary-light: #509bf0;
    --secondary-color: #3931c8;
    --accent-color: #f72525;
    --text-dark: #2b2d42;
    --text-light: #6c757d;
    --bg-light: #ffffff;
    --bg-dark: #606060;
    --border-color: #4c4c4c;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
    --shadow-hover: 0 10px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}
body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    font-size: 32px;
    color: var(--bg-light);
    background-color: var(--bg-dark);
    overflow-x: hidden;
}
.container {
    display: flex;
    flex-flow: column wrap;
    align-items: center;
    width: 800px;
    gap: 1rem;
}
.exercise {    
    width: fit-content;
    font-size: 2rem;
    padding: 10px 20px;
    color: #ffffff;
    background-color: #5a5a5a;
    border: none;
    border-radius: 12px;
    margin: 10px 12px 10px 12px;
}
.exercise__title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}
.exercise__text {
    font-size: 1.2rem;
}

/* Form */
.form {
    display: flex;
    margin: 4rem;
    width: 800px;
}
.form form {
    display: flex;
    flex-flow: column nowrap;
    align-items: center;
    width: 90%;
}
.form__text {
    margin-bottom: 1rem;
    font-size: 1.5rem;
}
.form__text-accent {
    color: #b74545;
    font-weight: 600;
    text-decoration: underline;
}
.form-group {
    margin-bottom: 1rem;
    width: 100%;
}
.form-group input, .form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 5px;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    transition: var(--transition);
}
.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: var(--shadow);
}
.form__result {
    width: 100%;
    height: 3rem;
    background-color: var(--bg-light);
    color: var(--text-dark);
    padding: 1rem;
    border-radius: 5px;
    border: 2px solid var(--border-color);
    font-family: 'Inter', sans-serif;
    font-size: 1.2rem;
    font-weight: 500;
    text-align: center;
    margin-top: 1rem;
}
.success {
    width: 100%;
    background-color: #d4edda;
    color: #155624;
    padding: 1rem;
    border-radius: 5px;
    border: 2px solid #c3e6cb;
    font-family: 'Inter', sans-serif;
    font-size: 1.5rem;
    font-weight: 500;
    text-align: center;
    margin-top: 1rem;
}
.error {
    width: 100%;
    background-color: #f8d7da;
    color: #721c24;
    padding: 1rem;
    border-radius: 5px;
    border: 2px solid #f6c6cb;
    font-family: 'Inter', sans-serif;
    font-size: 1.5rem;
    font-weight: 500;
    text-align: center;
    margin-top: 1rem;
}
.info-box {
    padding: 1rem;
    border-radius: 10px;
    margin-left: 4.5rem;
    font-size: 1.5rem;
}
.submit-btn {
    width: 80%;
    padding: 1rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 16px;
    font-family: 'Inter', sans-serif;
    font-size: 1.5rem;
    font-weight: 500;
    cursor: pointer;
    margin-top: 0.5rem;
    transition: var(--transition);
}
.submit-btn:hover {
    background-color: var(--secondary-color);
    box-shadow: var(--shadow);
    scale: 1.03;
}
label {
    display: block;
    margin-bottom: 0.5rem;
    color: #ffffff;
    font-size: 1.5rem;
    font-weight: bold;
}
#amountGroup {
    display: none;
}

/* Footer */
.footer {
    padding: 2rem 0;
    background-color: var(--text-dark);
    color: white;
    text-align: center;
    width: 100%;
}
.footer-text {
    transition: var(--transition);
    cursor: default;
    font-size: 1.5rem;
    text-decoration: none;
    color: white;
    cursor: pointer;
}
.footer-text:hover {
    color: var(--primary-light);
}
.footer__box {    
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}