@import url("https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;700&display=swap");
*, *:after, *:before {
  box-sizing: border-box;
}

body {
  font-family: "DM Sans", sans-serif;
  line-height: 1.5;
  background-color: #f1f3fb;
  padding: 0 2rem;
}

img {
  max-width: 100%;
  display: block;
}

input {
  -webkit-appearance: none;
     -moz-appearance: none;
          appearance: none;
  border-radius: 0;
}

.card {
    margin: 5rem auto;
    display: -webkit-box;
    display: flex
;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    flex-direction: column !important;
    width: 100%;
    max-width: 475px;
    background-color: #ffffff00 !important;
    border-radius: 10px !important;
    box-shadow: 0 0 40px rgba(0, 255, 200, 0.2), 0 0 80px rgba(0, 255, 200, 0.1);
    padding: .75rem;
    border: 1px solid #00ffc0 !important;
}

.card-image {
  border-radius: 8px;
  overflow: hidden;
  padding-bottom: 65%;
  background-image: url("https://assets.codepen.io/285131/coffee_1.jpg");
  background-repeat: no-repeat;
  background-size: 150%;
  background-position: 0 5%;
  position: relative;
}

.card-heading {
  position: absolute;
  left: 10%;
  top: 15%;
  right: 10%;
  font-size: 1.75rem;
  font-weight: 700;
  color: #735400;
  line-height: 1.222;
}
.card-heading small {
  display: block;
  font-size: .75em;
  font-weight: 400;
  margin-top: .25em;
}

.card-form {
  padding: 1rem 1rem 1rem;
}

.input {
  display: -webkit-box;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: reverse;
          flex-direction: column-reverse;
  position: relative;
  padding-top: 1.5rem;
}
.input + .input {
  margin-top: 1.5rem;
}

.input-label {
  color: #8597a3;
  position: absolute;
  top: 1.5rem;
  -webkit-transition: .25s ease;
  transition: .25s ease;
}

.input-field {
    color: #03A9F4;
    border: 0;
    z-index: 1;
    background-color: transparent;
    border-bottom: 2px solid #eee;
    font: inherit;
    font-size: 1.125rem;
    padding: .25rem 0;
}
.input-field:focus, .input-field:valid {
  outline: 0;
  border-bottom-color: #6658d3;
}
.input-field:focus + .input-label, .input-field:valid + .input-label {
  color: #6658d3;
  -webkit-transform: translateY(-1.5rem);
          transform: translateY(-1.5rem);
}

.action {
  margin-top: 2rem;
}

.action-button {
    font: inherit;
    font-size: 1.25rem;
    padding: 0.8rem;
    width: 100%;
    font-weight: 500;
    background: linear-gradient(to right, #00ac8d, #02c42a);
    border-radius: 6px;
    color: #FFF;
    border: 0;
    text-shadow: 0 0 8px rgba(255,255,255,0.8); /* chữ phát sáng */
    box-shadow: 0 0 15px rgba(0, 172, 141, 0.6), 0 0 30px rgba(2, 196, 42, 0.4); /* nút phát sáng */
    transition: 0.3s;
}
.action-button:hover {
    box-shadow: 0 0 20px rgba(0, 172, 141, 0.8), 0 0 40px rgba(2, 196, 42, 0.6);
}

.action-button:focus {
  outline: 0;
}

.card-info {
  padding: 1rem 1rem;
  text-align: center;
  font-size: .875rem;
  color: #8597a3;
}
.card-info a {
  display: block;
  color: #6658d3;
  text-decoration: none;
}

.login-btn-b {
  width: 60%;
  padding: 0.6em;
  margin-left: 16%;
}