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

body {
    font-family: "Segoe UI", Arial, sans-serif;
    background-color: #f4f6f9;
    color: #333;
    text-align: center;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

h1 {
    font-size: 2rem;
    margin-bottom: 25px;
    font-weight: 600;
    color: #222;
}

.container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    font-size: 1.2rem;
    margin-top: 15px;
}

.choice p,
.choice input {
    background-color: #ffffff;
    border: 1.5px solid #d0d7de;
    color: #333;
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 1rem;
    transition: border 0.3s ease, box-shadow 0.3s ease;
}

.choice input {
    outline: none;
    text-align: center;
    width: 150px;
}

.choice input::placeholder {
    color: #999;
}

.choice input:focus {
    border-color: #3b82f6;
    box-shadow: 0 0 4px rgba(59, 130, 246, 0.4);
}

.message {
    margin-top: 35px;
}

#msg {
    font-size: 1.1rem;
    background-color: #3b82f6;
    color: white;
    padding: 10px 22px;
    border-radius: 8px;
    display: none;
    font-weight: 500;
}

#play-btn {
    padding: 10px 35px;
    margin-top: 40px;
    border-radius: 20px;
    background-color: #2563eb;
    color: white;
    font-size: 16px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease;
}

#play-btn:hover {
    background-color: #1d4ed8;
    transform: scale(1.03);
}

#play-btn:disabled {
    background: #9ca3af;
    cursor: not-allowed;
}