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

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Roboto", sans-serif;
}

/* 🌈 Background */
.container {
    background: linear-gradient(-135deg, #ff6a00, #ee0979, #00c6ff, #0072ff, #00ff88);
    background-size: 400% 400%;
    animation: bgMove 15s ease infinite;

    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: clamp(15px, 3vw, 40px);
}

@keyframes bgMove {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

/* 🪟 Card */
.card {
    width: clamp(280px, 90%, 380px);
    padding: clamp(15px, 2vw, 25px);

    background: #fff;
    border-radius: 15px;

    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(20px);

    transition: 0.3s;
    animation: float 4s ease-in-out infinite;
}

.card:hover {
    box-shadow: 0 10px 25px rgba(255, 255, 255, 0.3);
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

input {
    width: 100%;
    height: clamp(35px, 5vw, 45px);

    font-size: clamp(14px, 2vw, 28px);
    font-weight: bold;

    padding: 0 10px;
    margin-bottom: 10px;

    border-radius: 25px;
    border: none;
    outline: none;

    text-align: right;

    background: rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);

    transition: 0.3s;
}

/* 🔤 Heading */
h1 {
    text-align: center;
    font-size: clamp(18px, 3vw, 30px);
    margin: 10px 0;
}

/* 🧮 Buttons Grid */
.buttonsContainer {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: clamp(5px, 1vw, 10px);
}

/* 🔘 Buttons */
button {
    width: clamp(40px, 8vw, 55px);
    height: clamp(40px, 8vw, 55px);

    font-size: clamp(14px, 2vw, 25px);

    border-radius: 50%;
    border: none;
    background: transparent;

    cursor: pointer;
    transition: 0.3s;
}

button:hover {
    background: black;
    color: white;
}

/* ⭐ Special Buttons */
.style {
    color: orange;
    font-size: clamp(16px, 2vw, 22px);
}

.style:hover {
    background: orange;
    color: white;
}

/* 🎯 Icon */
i {
    cursor: pointer;
    font-size: clamp(22px, 3vw, 30px);

    position: relative;
    left: 90%;
    bottom: clamp(10px, 3vh, 10px);

    transition: 0.3s;
}

i:hover {
    transform: rotate(20deg) scale(1.2);
}


.addBgColor {
    background-color: transparent;
}

.buttonsColor {
    color: #fff;
}

.moonColor {
    color: #fff;
}

.buttonStyles {
    color: orange;
}

.heading {
    color: #fff;
}

.bgColor {
    background-color: #fff;
}