@import url('https://fonts.googleapis.com/css2?family=Silkscreen:wght@400;700&display=swap');

body {
    font-family: 'Silkscreen', sans-serif;    
    margin: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #2176cc;
}

/* #calculator {
    background-color: #e8e7cb;
    border-radius: 20px;
    max-width: 500px;
    overflow: hidden;
    margin-top: 50px;
    margin-bottom: 50px;
    padding-top: 32px;
} */

/* #display {
    width: 100%;
    padding: 20px;
    border: none;
    font-size: 5rem;
    text-align: left;
    background-color: hsl(58, 39%, 80%);
    color: hsl(356, 93%, 75%);
    font-family: 'Silkscreen', sans-serif;    
} */

/* #keys {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    padding: 25px;
} */

/* button {
    font-family: 'Silkscreen', sans-serif;    
    width: 100px;
    height: 100px;
    border-radius: 50px;
    border: none;
    background-color: hsl(356, 93%, 75%);
    color: #e8e7cb;
    font-size: 3rem;
    cursor: pointer;
} */

#calculator {
    background-color: #e8e7cb;
    border-radius: 20px;
    width: 90%;              /* Instead of max-width: 500px */
    max-width: 500px;        /* Keep this as upper limit */
    overflow: hidden;
    margin: 50px auto;       /* Center it */
    padding-top: 32px;
}

#display {
    width: 100%;
    padding: 20px;
    border: none;
    font-size: clamp(2rem, 8vw, 5rem);  /* Responsive font size */
    text-align: left;
    background-color: hsl(58, 39%, 80%);
    color: hsl(356, 93%, 75%);
    font-family: 'Silkscreen', sans-serif;
    box-sizing: border-box;   /* Include padding in width */
}

button {
    font-family: 'Silkscreen', sans-serif;    
    aspect-ratio: 1 / 1;     /* Makes square buttons */
    border-radius: 50px;
    border: none;
    background-color: hsl(356, 93%, 75%);
    color: #e8e7cb;
    font-size: clamp(1.5rem, 4vw, 3rem);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

#keys {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: clamp(5px, 2vw, 10px);  /* Responsive gaps */
    padding: 25px;    
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    #header1 {
        font-size: clamp(1.5rem, 6vw, 3rem);
    }
    
    img {
        width: 3em;
        height: 3em;
    }
    
    #note {
        padding: 15px;
        margin-bottom: 15px;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    header {
        flex-direction: column;
        text-align: center;
    }
    
    #calculator {
        margin: 20px auto;
    }
}

button:hover {
    background-color: hsl(356, 93%, 80%);    
}

button:active {
    background-color: hsl(356, 93%, 85%);    
}

.operator-btn {
    background-color: #ff7d6e;
}

.operator-btn:hover {
    background-color: hsl(6, 100%, 75%);
}

.operator-btn:active {
    background-color: hsl(6, 100%, 80%);
}

.flash {
    animation: flash-effect 0.3s ease-in-out;
}

@keyframes flash-effect {
    0% { background-color: normal; }
    50% { background-color: hsl(58, 39%, 90%)}
    100% { background-color: normal; }
}

header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 2rem;
    padding-bottom: 0;
}

img {
    width: 5em;
    height: 5em;
}


#header1 {
    /* color: hsl(356, 93%, 75%); */
    color: hsl(58, 39%, 90%);
    font-size: 3rem;
    margin: 0px;
}

#note {
    margin: 0px;
    background-color: hsl(58, 60%, 85%);
    padding: 25px;
    margin-bottom: 25px;
    color: #2176cc;
}

p {
    margin: 0px;
}

footer {
    color: #e8e7cb;
    margin-top: auto;
    text-align: center;
    padding: 1rem;
    font-size: 1rem;
}

a {
    text-decoration: none;
    color: #e8e7cb;
}