/* General Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

 div, a, li {
    border-style: dotted;
    border-color: red;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
}

/* Container for max-width */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
/* Top bar */
#top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;

}

/* Menu Section */
#menu {
    padding: 10px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

#menu ul {
    list-style: none;
    display: flex;
}

#menu li {
    margin-right: 20px;
}

#menu a {
    text-decoration: none;
    color: #333;
    transition: color 0.3s;
}

#menu a:hover {
    color: #3498db;
}


/* Promo Section */
#promo {
    background-color: #2c3e50;
    color: white;
    text-align: center;
    padding: 40px 20px;
}

#promo h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

#promo p {
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

#promo button {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 10px 20px;
    font-size: 1rem;
    cursor: pointer;
    border-radius: 5px;
    transition: background-color 0.3s;
}

#promo button:hover {
    background-color: #2980b9;
}

/* Contents Section */
#contents {
    padding: 30px 20px;
}

#contents h2 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

#contents ol {
    padding-left: 20px;
    font-size: 1.1rem;
}

/* About Section */
#about {
    padding: 30px 20px;
    background-color: white;
}

#about h2 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

#about p {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

/* Features Section */
#features {
    padding: 30px 20px;
}

#features h2 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

#features ol {
    padding-left: 20px;
    font-size: 1.1rem;
}

/* Team Section */
#team {
    padding: 30px 20px;
    background-color: white;
}

#team h2 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

#team p {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

/* Invest Section */
#invest {
    padding: 30px 20px;
}

#invest h2 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

#invest ol {
    padding-left: 20px;
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

#invest table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.5rem;
}

#invest th, #invest td {
    border: 1px solid #ddd;
    padding: 10px;
    text-align: left;
}

#invest th {
    background-color: #2c3e50;
    color: white;
}

#invest button {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 10px 20px;
    font-size: 1rem;
    cursor: pointer;
    border-radius: 5px;
    transition: background-color 0.3s;
}

#invest button:hover {
    background-color: #2980b9;
}

/* Responsive Design */

/* X-Small (<576px) */
@media (max-width: 575.98px) {
    .container {
        padding: 0 10px;
    }

    #promo h1 {
        font-size: 1.8rem;
    }

    #promo p {
        font-size: 1rem;
    }

    #promo button {
        padding: 8px 16px;
        font-size: 0.9rem;
    }

    #contents h2, #about h2, #features h2, #team h2, #invest h2 {
        font-size: 1.5rem;
    }

    #contents ol, #features ol, #invest ol {
        font-size: 1rem;
    }

    #about p, #team p {
        font-size: 1rem;
    }

    #invest table {
        font-size: 0.9rem;
    }

    #invest th, #invest td {
        padding: 8px;
    }
}

/* Small (≥576px) */
@media (min-width: 576px) {
    .container {
        padding: 0 15px;
    }

    #promo h1 {
        font-size: 2rem;
    }

    #promo p {
        font-size: 1.1rem;
    }

    #contents h2, #about h2, #features h2, #team h2, #invest h2 {
        font-size: 1.6rem;
    }
}

/* Medium (≥768px) */
@media (min-width: 768px) {
    #promo h1 {
        font-size: 2.2rem;
    }

    #promo p {
        font-size: 1.15rem;
    }

    #contents h2, #about h2, #features h2, #team h2, #invest h2 {
        font-size: 1.7rem;
    }

    #contents ol, #features ol, #invest ol {
        font-size: 1.05rem;
    }
}

/* Large (≥992px) */
@media (min-width: 992px) {
    #promo h1 {
        font-size: 2.5rem;
    }

    #promo p {
        font-size: 1.2rem;
    }

    #contents h2, #about h2, #features h2, #team h2, #invest h2 {
        font-size: 1.8rem;
    }

    #contents ol, #features ol, #invest ol {
        font-size: 1.1rem;
    }
}