body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    background-color: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 450px;
    text-align: center;
}

h1 {
    margin-bottom: 15px;
    color: #333;
    font-size: 1.8rem;
}

h2 {
    color: #555;
    font-size: 1.2rem;
    margin-bottom: 15px;
}

form {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 20px;
}

label {
    text-align: left;
    font-weight: 600;
    color: #555;
    margin-bottom: -10px;
}

input, select {
    padding: 12px;
    font-size: 16px;
    border-radius: 8px;
    border: 2px solid #e0e0e0;
    transition: border-color 0.3s;
}

input:focus, select:focus {
    outline: none;
    border-color: #11998e;
}

button {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: white;
    border: none;
    padding: 14px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    margin-top: 10px;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(17, 153, 142, 0.4);
}

button:active {
    transform: translateY(0);
}

#result {
    margin-top: 25px;
    font-weight: bold;
    font-size: 1.2rem;
    color: #11998e;
    padding: 15px;
    background-color: #e8f8f5;
    border-radius: 8px;
    min-height: 0;
}

#result:empty {
    display: none;
}

#exchange-rates {
    margin-bottom: 25px;
    padding: 20px;
    background-color: #e8f8f5;
    border-radius: 12px;
}

#rates-list {
    list-style-type: none;
    padding: 0;
    margin: 0;
}

#rates-list li {
    padding: 10px;
    border-bottom: 1px solid #e0e0e0;
    color: #555;
}

#rates-list li:last-child {
    border-bottom: none;
}