body {
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #1e1e2f;
    min-height: 100vh;
    margin: 0;
    font-family: Arial, sans-serif;
}

.buttons {
    background-color: blue;
    text-align: center;
    width: 90%;
    max-width: 380px;
    border-radius: 20px;
    padding: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    transition: background-color 0.4s ease;
}

#display {
    width: 100%;
    height: 60px;
    margin-bottom: 20px;
    font-size: 28px;
    text-align: right;
    padding: 10px;
    border-radius: 10px;
    border: none;
    background-color: #fff;
    box-sizing: border-box;
}

.row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
}

.buttons button {
    flex: 1;
    height: 65px;
    margin: 5px;
    font-size: 22px;
    border-radius: 10px;
    border: none;
    background: linear-gradient(180deg, #ffffff 0%, #e0e0e0 100%);
    cursor: pointer;
    box-shadow: 0 4px #999;
    transition: 0.1s;
}

.buttons button:active {
    box-shadow: 0 1px #666;
    transform: translateY(3px);
    background: #ffcc00;
}

/* Teeno buttons barabar jagah lenge */
#equalBtn, #clearBtn, .row button:nth-child(2) {
    flex: 1;
    height: 60px;
}

@media (max-width: 360px) {
    .buttons button {
        height: 55px;
        font-size: 18px;
    }
}