body {
    font-family: Arial, sans-serif;
    margin: 0;
    background-color: #ffffff;
    color: #333;
}

header {
    background-color: #FEE500; /* Kakao Yellow */
    padding: 1rem;
    border-bottom: 1px solid #ddd;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.logo a {
    text-decoration: none;
    color: #1b1b1b;
    font-weight: bold;
    font-size: 1.5rem;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 1rem;
    margin: 0;
    padding: 0;
}

nav ul li a {
    text-decoration: none;
    color: #1b1b1b;
    font-weight: 500;
}

.auth-buttons button {
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
}

.auth-buttons .login {
    background-color: transparent;
    color: #1b1b1b;
}

.auth-buttons .signup {
    background-color: #1b1b1b;
    color: #FEE500;
}

main {
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.hero {
    text-align: center;
    padding: 4rem 0;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    color: #555;
    margin-bottom: 2rem;
}

.hero .get-started {
    background-color: #FEE500;
    color: #1b1b1b;
    padding: 1rem 2rem;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
}

.market-overview {
    padding: 2rem 0;
}

.market-data {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.market-card {
    background-color: #f9f9f9;
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid #eee;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.market-card h3 {
    margin: 0 0 1rem;
    font-size: 1.5rem;
}

.market-card .price {
    font-size: 1.8rem;
    font-weight: bold;
    margin: 0 0 1rem;
}

.market-card .change {
    font-size: 1rem;
    font-weight: 500;
}

.market-card .change.positive {
    color: #28a745; /* Green for positive change */
}

.market-card .change.negative {
    color: #dc3545; /* Red for negative change */
}

footer {
    text-align: center;
    padding: 1rem;
    margin-top: 2rem;
    background-color: #f2f2f2;
    border-top: 1px solid #ddd;
}