* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;

    font-family:
        -apple-system,
        BlinkMacSystemFont,
        "Helvetica Neue",
        "Yu Gothic",
        "Hiragino Kaku Gothic ProN",
        sans-serif;

    color: #172033;

    background:
        radial-gradient(circle at top left,
            #dbeafe 0,
            transparent 34%),
        radial-gradient(circle at bottom right,
            #e0e7ff 0,
            transparent 36%),
        #f8fafc;
}

.card {
    width: min(680px, 100%);
    padding: 56px 36px;
    text-align: center;

    background: rgba(255, 255, 255, 0.88);

    border: 1px solid rgba(255, 255, 255, 0.9);
    border-radius: 24px;

    box-shadow: 0 24px 70px rgba(15, 23, 42, 0.12);

    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.icon-link {
    width: 86px;
    height: 86px;
    margin: 0 auto 24px;

    display: block;

    color: inherit;
    text-decoration: none;

    border-radius: 50%;

    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease;
}

.icon {
    width: 100%;
    height: 100%;

    display: grid;
    place-items: center;

    border-radius: 50%;

    font-size: 42px;

    background: #eff6ff;

    cursor: pointer;
    user-select: none;
}

.icon-link:hover {
    transform: scale(1.08) rotate(-5deg);

    box-shadow: 0 12px 28px rgba(59, 130, 246, 0.22);
}

.icon-link:active {
    transform: scale(0.95);
}

.icon-link:focus-visible {
    outline: none;

    box-shadow:
        0 0 0 4px #ffffff,
        0 0 0 8px #3b82f6;
}

h1 {
    margin: 0 0 14px;

    font-size: clamp(34px, 8vw, 58px);

    letter-spacing: 0.08em;
}

p {
    margin: 0;

    font-size: 17px;
    line-height: 1.8;

    color: #64748b;
}

.domain {
    margin-top: 30px;

    font-size: 14px;
    letter-spacing: 0.08em;

    color: #94a3b8;
}

@media (max-width: 500px) {
    .card {
        padding: 44px 24px;
    }

    .icon-link {
        width: 78px;
        height: 78px;
    }

    .icon {
        font-size: 38px;
    }

    p {
        font-size: 15px;
    }
}