* {
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, sans-serif;
}

body {
    min-height: 100vh;
    margin: 0;
    background: radial-gradient(circle at top, #0f2d1e, #06140d);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #c8ffdd;
}


#number_input {
    width: 230px;
    
    font-size: 20px;
    border-radius: 12px;
    border: 2px solid #1aff6c;
    background-color: #02180e;
    color: #c8ffdd;
    text-align: center;
    outline: none;
    box-shadow: 0 0 15px rgba(26, 255, 108, 0.4);
    margin-bottom: 15px;
}

#number_input::placeholder {
    color: #6cffb1;
}


#message_box {
    width: 320px;
    min-height: 70px;
    background: rgba(0, 255, 120, 0.08);
    border: 2px solid rgba(26, 255, 108, 0.6);
    border-radius: 14px;
    padding: 14px;
    margin-bottom: 20px;
    text-align: center;
    font-size: 16px;
    box-shadow:
        0 0 10px rgba(26, 255, 108, 0.4),
        inset 0 0 10px rgba(26, 255, 108, 0.2);
}


.button {
    width: 180px;
    
    margin: 8px;
    text-align: center;
    background: linear-gradient(145deg, #0b3d25, #0f6b3a);
    border-radius: 30px;
    cursor: pointer;
    font-weight: bold;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: #baffd8;
    box-shadow:
        0 0 12px rgba(26, 255, 108, 0.5),
        0 4px 12px rgba(0, 0, 0, 0.6);
    transition: all 0.2s ease;
    user-select: none;
}


.button:hover {
    background: linear-gradient(145deg, #14ff7f, #0fa958);
    color: #02180e;
    box-shadow:
        0 0 20px rgba(26, 255, 108, 0.9),
        0 0 40px rgba(26, 255, 108, 0.6);
    transform: translateY(-2px) scale(1.05);
}


.button:active {
    transform: scale(0.96);
    box-shadow:
        0 0 8px rgba(26, 255, 108, 0.5);
}.button{
    width: 175px;
    height: 30px;
    border: 1px solid black;
    background-color: bisque;
    text-align: center;
    line-height: 30px;
    cursor: pointer;
}