body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    box-sizing: border-box;
    font-size: 16px;
    white-space: pre-line;
    padding: 24px;
}

.container {
    position: relative;
    height: 100%;
    width: 100%;
    display: flex;
    flex-direction: column;
    text-align: center;
    justify-content: center;
}

.phone {
    background: transparent;
    width: 200px;
    height: auto;
    margin: 0 auto 20px;
}

.phone-wrapper {
    position: relative;
    display: inline-block;
}

.phone-wrapper::after {
    content: '';
    position: absolute;
    bottom: 20px;
    left: 0;
    width: 100%;
    height: 25%;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 1) 100%);
}

h1 {
    margin: 10px 0;
    font-size: 36px;
}

p {
    margin: 10px 0 20px;
    color: #121929;
    opacity: 70%;
}

.button {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 12px;

    display: flex;
    justify-content: center;
    align-items: center;
    flex-grow: 1;

    height: 55px;
    width: 100%;
    font-weight: bold;
    font-size: 16px;
    border-radius: 12px;

    outline: none;
    border: none;
    cursor: pointer;
}

.button.start-chat {
    color: #3F5D81;
    background-color: #CFE5F3;
}

.button.share {
    color: white;
    background-color: #0A0F16;
    gap: 10px;
}

.button:hover {
    opacity: 90%;
}

.button:active {
    opacity: 90%;
}

/* Dark Theme */
body.dark {
    background-color: #000;
    color: #fff;
}

body.dark #subtitle {
    color: #fff;
    opacity: 70%;
}

body.dark .button.share {
    color: #3F5D81;
    background: white;
}

body.dark .phone-wrapper::after {
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 1) 100%);
}

@media (max-height: 670px) {
    body {
        font-size: 12px;
    }

    h1 {
        margin: 5px 0;
        font-size: 20px;
    }

    p {
        margin: 10px 0;
    }

    .button {
        bottom: 6px;
        height: 40px;
        font-size: 12px;
    }
}

@media (max-height: 490px) {
    body {
        font-size: 10px;
        padding: 10px;
    }

    h1 {
        margin: 0;
        font-size: 16px;
    }

    p {
        margin: 10px 0;
    }

    .phone {
        width: 200px;
        height: auto;
        margin: 0 auto 10px;
    }

    .phone-wrapper::after {
        bottom: 10px;
    }

    .button {
        bottom: 0;
        height: 30px;
        font-size: 10px;
    }
}