ubicloud/views/email/style.erb

<style>
  /* Base */

  body,
  body *:not(html):not(style):not(br):not(tr):not(code) {
      box-sizing: border-box;
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif,
          'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';
      position: relative;
  }

  body {
      -webkit-text-size-adjust: none;
      background-color: #ffffff;
      color: #718096;
      height: 100%;
      line-height: 1.4;
      margin: 0;
      padding: 0;
      width: 100% !important;
  }

  p,
  ul,
  ol,
  blockquote {
      line-height: 1.4;
      text-align: left;
  }

  a {
      color: #3869d4;
  }

  a img {
      border: none;
  }

  /* Typography */

  h1 {
      color: #3d4852;
      font-size: 18px;
      font-weight: bold;
      margin-top: 0;
      text-align: left;
  }

  p {
      font-size: 16px;
      line-height: 1.5em;
      margin-top: 0;
      text-align: left;
  }

  p.sub {
      font-size: 12px;
  }

  img {
      max-width: 100%;
  }

  /* Layout */

  .wrapper {
      -premailer-cellpadding: 0;
      -premailer-cellspacing: 0;
      -premailer-width: 100%;
      background-color: #fef4ea;
      margin: 0;
      padding: 0;
      width: 100%;
  }

  .content {
      -premailer-cellpadding: 0;
      -premailer-cellspacing: 0;
      -premailer-width: 100%;
      margin: 0;
      padding: 0;
      width: 100%;
  }

  /* Header */

  .header {
      padding: 25px 0;
      text-align: center;
  }

  .header a {
      color: #3d4852;
      font-size: 19px;
      font-weight: bold;
      text-decoration: none;
  }

  /* Logo */

  .logo {
      width: 320px;
  }

  /* Body */

  .body {
      -premailer-cellpadding: 0;
      -premailer-cellspacing: 0;
      -premailer-width: 100%;
      background-color: #fef4ea;
      border-bottom: 1px solid #edf2f7;
      border-top: 1px solid #edf2f7;
      margin: 0;
      padding: 0;
      width: 100%;
  }

  .inner-body {
      -premailer-cellpadding: 0;
      -premailer-cellspacing: 0;
      -premailer-width: 570px;
      background-color: #ffffff;
      border-color: #e8e5ef;
      border-radius: 24px;
      border-width: 1px;
      box-shadow: 0 2px 0 rgba(0, 0, 150, 0.025), 2px 4px 0 rgba(0, 0, 150, 0.015);
      margin: 0 auto;
      padding: 0;
      width: 570px;
  }

  /* Subcopy */

  .subcopy {
      border-top: 1px solid #e8e5ef;
      margin-top: 25px;
      padding-top: 25px;
  }

  .subcopy p {
      font-size: 12px;
  }

  /* Footer */

  .footer {
      -premailer-cellpadding: 0;
      -premailer-cellspacing: 0;
      -premailer-width: 570px;
      margin: 0 auto;
      padding: 24px 0;
      text-align: center;
      width: 570px;
  }

  .footer p {
      color: #b0adc5;
      font-size: 12px;
      text-align: left;
  }

  .footer a {
      color: #b0adc5;
      text-decoration: underline;
  }

  .footer .icon svg {
    height: 1.5rem;
    width: 1.5rem;
  }

  .content-cell {
      max-width: 100vw;
      padding: 32px;
  }

  /* Buttons */

  .action {
      -premailer-cellpadding: 0;
      -premailer-cellspacing: 0;
      -premailer-width: 100%;
      margin: 30px auto;
      padding: 0;
      text-align: center;
      width: 100%;
  }

  .button {
      -webkit-text-size-adjust: none;
      border-radius: 4px;
      color: #fff;
      display: inline-block;
      overflow: hidden;
      text-decoration: none;
      text-align: center;
      width: 100%;
      box-sizing: border-box;
  }

  .button-primary {
      background-color: #ea580c;
      border-bottom: 8px solid #ea580c;
      border-left: 18px solid #ea580c;
      border-right: 18px solid #ea580c;
      border-top: 8px solid #ea580c;
  }

  /* Utilities */

  .break-all {
      word-break: break-all;
  }

  @media only screen and (max-width: 600px) {
    .inner-body {
      width: 100% !important;
    }

    .footer {
      width: 100% !important;
    }
  }

  @media only screen and (max-width: 500px) {
    .button {
      width: 100% !important;
    }
  }
</style>