* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: #121212;
    color: #ffffff;
    line-height: 1.6;
}

.header {
    background-color: #1a1a1a;
    padding: 15px 0;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.header .logo {
    font-size: 24px;
    font-weight: bold;
    color: #0f0;
}

.header nav a {
    color: #ffffff;
    text-decoration: none;
    margin: 0 15px;
    padding: 5px 10px;
}

.coin-info {
    text-align: center;
    padding: 40px 20px;
}

.coin-info h1 {
    font-size: 32px;
    margin-bottom: 20px;
    color: #0f0;
}

.coin-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

.coin-card {
    background-color: #1f1f1f;
    padding: 15px;
    border-radius: 10px;
    text-align: center;
    cursor: pointer;
    transition: transform 0.3s;
}

.coin-card:hover {
    transform: scale(1.05);
    background-color: #0f0;
    color: #121212;
}

.buy-section {
    text-align: center;
    padding: 40px 20px;
    background-color: #1f1f1f;
    border-radius: 10px;
    margin: 20px auto;
    max-width: 600px;
}

.buy-section h2 {
    font-size: 28px;
    margin-bottom: 15px;
    color: #0f0;
}

.buy-section input[type="number"] {
    width: 100%;
    padding: 10px;
    border: 2px solid #0f0;
    border-radius: 5px;
    background-color: #2a2a2a;
    color: #ffffff;
    margin-bottom: 15px;
}

.buy-section .total-price {
    font-size: 24px;
    margin: 15px 0;
    color: #0f0;
}

.buy-section button, .buying-options button {
    background-color: #0f0;
    color: #121212;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 18px;
    transition: background-color 0.3s, transform 0.3s;
    margin: 10px 0; /* Add margin for spacing */
}

.buy-section button:hover, .buying-options button:hover {
    background-color: #fff;
    color: #121212;
    transform: scale(1.05);
}

.buying-options {
    text-align: center;
}

.buying-options ul {
    list-style: none;
    padding: 0;
}

.buying-options li {
    margin: 10px 0; /* Add margin for spacing */
}

footer {
    background-color: #1a1a1a;
    padding: 20px 0;
    text-align: center;
    color: #ffffff;
}