:root {
  --body-bg-color: #f7f6f5;
  --main-color: #f3f3f2;
  --input-color: #fafafa;
  --main-font-color: #383c3c;
  --neumorphism-shadow-inset: inset .2em .2em .3em rgba(0, 0, 0, .25), inset -.3em -.3em .4em rgba(255, 255, 255, .8);
  --neumorphism-shadow: .2em .2em .4em rgba(0, 0, 0, .25), -.3em -.3em .4em rgba(255, 255, 255, .8);
}

@media screen and (max-width: 640px) {
  section {
    margin: 1em 0;
    padding: 2em 1.2em;
  }

  h1 {
    font-size: 1.7em;
  }

  h2 {
    font-size: 1.5em;
  }

  h3 {
    padding: .2em .4em;
    font-size: 1.3em;
  }

  h4 {
    padding: .3em .6em;
    font-size: 1.2em;
  }

  h5 {
    padding: .2em 0;
    font-size: 1.1em;
  }

  h6 {
    font-size: 1em;
  }
}

@media screen and (min-width: 640px) {
  section {
    margin: 1em .5em;
    padding: 2em;
  }

  h1 {
    font-size: 2.2em;
  }

  h2 {
    font-size: 1.9em;
  }

  h3 {
    padding: .2em .6em;
    font-size: 1.75em;
  }

  h4 {
    padding: .4em .8em;
    font-size: 1.4em;
  }

  h5 {
    padding: .3em 0;
    font-size: 1.2em;
  }

  h6 {
    font-size: 1em;
  }
}

@media screen and (max-width: 955px) {
  .css__main-area {
    width: min(640px, 100%);
    margin: 0 auto;
  }

  .css__app-area {
    flex-direction: column;   
  }
}

@media screen and (min-width: 956px) {
  .css__main-area {
    width: 640px;
  }
  
  .css__flex {
    display: flex;
  }
}

* {
  font-family: NotoSansJP, Avenir, Helvetica, Arial;
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
  -moz-osx-font-smoothing: grayscale;
  font-size: 14px;
  overflow-wrap: break-word;
}

*, *::before, *::after {
  box-sizing: border-box;
}

*::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

*::-webkit-scrollbar-track{
  background-color: rgba(0, 0, 0, .05);
  border-radius: 20px;
}
*::-webkit-scrollbar-thumb{
  background-color: rgba(0, 0, 0, .2);
  border-radius: 20px;
}

body {
  margin: 0;
  color: var(--main-font-color);
  background: var(--body-bg-color);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: bolder;
  padding: .25em;
}

h1,
h2,
h3 {
  margin: .75em 0;
}

h4,
h5,
h6 {
  margin: .5em 0;
}

h2 {
  border-bottom: .15em solid rgba(162, 32, 65, .75);
}

h3 {
  border-radius: .25em;
  border-left: .5em solid rgba(162, 32, 65, .75);
}

h4 {
  border-radius: .25em;
  color: #fcfcfc;
  text-shadow: 1px 1px 5px rgba(0, 0, 0, .2);
  background: rgba(162, 32, 65, .75);
}

h5 {
  border-bottom: .1em solid rgba(162, 32, 65, .75);
}

section > h1,
section > h2,
section > h3,
section > h4,
section > h5,
section > h6 {
  margin-top: 0;
}

input[type="text"],
input[type="email"],
input[type="date"],
input[type="month"],
input[type="number"],
input[type="password"],
input[type="search"],
input[type="tel"],
input[type="time"],
input[type="url"],
input[type="week"],
input[type="datetime-local"],
select,
textarea {
  -webkit-appearance: none;
  appearance: none;
  margin-bottom: .5em;
  color: var(--main-font-color);
  background: var(--input-color);
  border-radius: .4em;
  border: none;
  box-shadow: var(--neumorphism-shadow-inset);
}

input[type="text"],
input[type="email"],
input[type="date"],
input[type="month"],
input[type="number"],
input[type="password"],
input[type="search"],
input[type="tel"],
input[type="time"],
input[type="url"],
input[type="week"],
input[type="datetime-local"],
textarea {
  padding: .6em .7em;
}

select {
  padding: .6em 2.1em .6em .7em;
}

textarea {
  resize: none;
}

input[type="radio"] {

}

input[type="checkbox"] {
  display: none;
}

button, a.link-btn {
  transition: .3s;
  padding: .7em 2.1em;
  border: none;
  border-radius: 2em;
  background: var(--main-color);
  box-shadow: var(--neumorphism-shadow);
}

button {
  color: var(--main-font-color);
}

button:hover, a.link-btn:hover {
  cursor: pointer;
}

button:active, a.link-btn:active {
  transition: .3s;
  box-shadow: var(--neumorphism-shadow-inset);
}

button.css__circle_button {
  padding: .7em;
}

label {
  margin: .6em 0;
}

p {
  margin: .6em 0;
}

a {
  margin: 0 .2em;
  color: #3e62ad;
}

ul {

}

ol {
  padding-left: 2em;
}

ol ::marker {
  font-weight: bolder;
  color: #a22041;
}

li {
  padding: .75em 0;
}

table {
  border-collapse: collapse;
}

th, td {
  padding: .75em 1.25em;
  border-bottom: 1px solid rgba(0, 0, 0, .2);
  font-size: .9em;
}

th {
  background: rgba(220, 220, 220, .15);
}

td {
  vertical-align: middle;
}

section {
  border-radius: 1.2em;
  background: #f5f5f4;
  box-shadow: .2em .2em .8em rgba(0, 0, 0, .25);
}

img {

}

article {

}

blockquote {
  margin: .5em;
  padding: 1em;
  border-radius: .4em;
  font-style: italic;
  background: rgba(200, 201, 204, .1);
  border-left: .4em solid rgba(0, 0, 0, .2);
  box-shadow: .1em .1em .3em rgba(0, 0, 0, .2);
}

main {

}

aside {

}

header {
  display: flex;
  padding: 1em 2em;
  width: 100%;
  height: 10em;
  background: var(--body-bg-color);
  align-items: center;
  -webkit-backdrop-filter: blur(5px);
  backdrop-filter: blur(5px);
  box-shadow: .1em .1em .2em rgba(0, 0, 0, .2);
  text-shadow: 0 0 .2em rgba(0, 0, 0, .2);
  z-index: 9;
}

footer {
  display: flex;
  padding: 1em 2em;
  width: 100%;
  height: 20em;
  color: var(--main-color);
  background: #a22041;
  align-items: center;
  box-shadow: .1em .1em .2em rgba(0, 0, 0, .2);
  text-shadow: 0 0 .2em rgba(0, 0, 0, .2);
  z-index: 9;
}

head {

}

hr {
  margin: 2em 0;
  border: 1px solid rgba(0, 0, 0, .1);
}

nav {
  margin: 0 auto;
  width: min(96%, 1200px);
}

figure {
  overflow-x: scroll;
  margin: 2em 0;
}

#app {
  width: min(96%, 1200px);
  margin: 1em auto;
}

span.checkmark {
  position: absolute;
  top: 0;
  left: 0;
  height: 1.65em;
  width: 1.65em;
  background: transparent;
  border: solid 1px rgba(0,0,0,.2);
  border-radius: .1em;
}

span.checkmark:after {
  content: "";
  position: absolute;
  left: .5em;
  top: -.75em;
  width: 1em;
  height: 2em;
  border: solid rgba(162, 32, 65, .7);
  border-width: 0 .2em .2em 0;
  transform: rotate(45deg);
  opacity: 0;
}

label.checkbox {
  display: inline-block;
  position: relative;
  padding-left: 35px;
  cursor: pointer;
}

label.checkbox input:checked + span.checkmark {
}

label.checkbox input:checked + span.checkmark:after {
  opacity: 1;
}

.css__text-left {
  text-align: left;
}

.css__text-center {
  text-align: center;
}

.css__text-right {
  text-align: right;
}

.css__nowrap {
  white-space: nowrap;
}

.css__pre-wrap {
  white-space: pre-wrap;
}

.css__select_wrapper {
  position: relative;
  overflow-x: hidden;
}

.css__select_wrapper::after {
  content: "";
  position: absolute;
  top: .5em;
  right: 1em;
  width: 1em;
  height: 1em;
  border-right: 2px solid rgba(0,0,0,.2);
  border-bottom: 2px solid rgba(0,0,0,.2);
  transform: rotate(45deg);
}

.css__flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.css__flex-start {
  display: flex;
  justify-content: start;
  align-items: center;
}

.css__flex-end {
  display: flex;
  justify-content: end;
  align-items: center;
}

.css__icon-rotate-m30 {
  transform: rotate(-30deg);
}

.css__button-icon {
  margin: 0 .1em;
}

a.link-btn, a.css__link-icon {
  color: #383c3c;
  text-decoration: none;
}

a.css__link-icon[disabled] {
  opacity: .2;
}

.css__app-area {
  display: flex;
  text-align: center;
  justify-content: center;
}

.css__main-area {
  padding: 2em 0;
}