body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #667eea, #764ba2);
    margin: 0;
    padding: 0;
}

.container {
    width: 380px;
    margin: 60px auto;
    padding: 25px;
    background: white;
    border-radius: 15px;
    box-shadow: 0px 10px 30px rgba(0,0,0,0.2);
    text-align: center;
}

h1 {
    margin-bottom: 20px;
}

.input-group {
    margin: 10px 0;
    text-align: left;
}

label {
    font-size: 14px;
    color: #555;
}

input {
    width: 100%;
    padding: 10px;
    border-radius: 8px;
    border: 1px solid #ccc;
    margin-top: 5px;
}

.row {
    display: flex;
    gap: 10px;
}

button {
    width: 100%;
    padding: 12px;
    margin-top: 10px;
    border: none;
    border-radius: 10px;
    background: #667eea;
    color: white;
    font-size: 16px;
    cursor: pointer;
}

button:hover {
    background: #5a67d8;
}

.result {
    margin-top: 20px;
    color: #333;
}

.note {
    font-size: 12px;
    color: #888;
}

.history {
    max-height: 150px;
    overflow-y: auto;
}

.card {
    background: #f1f1f1;
    padding: 10px;
    border-radius: 8px;
    margin: 8px 0;
}

.dropdown {
    position: relative;
}

.dropdown-list {
    position: absolute;
    width: 100%;
    max-height: 150px;
    overflow-y: auto;
    background: white;
    border: 1px solid #ccc;
    border-radius: 8px;
    z-index: 1000;
}

.dropdown-list div {
    padding: 8px;
    cursor: pointer;
}

.dropdown-list div:hover {
    background: #f0f0f0;
}