html, body {
  height: 100%;
  margin: 0;
  background-color: #232023;
  color: #fcfcfc;
}

a {
  color: #ea79d8;
}

header, main, footer {
  border: 1px solid #c016c6;
  margin: 20px;
  padding: 8px;
}

.logo, nav {
  text-align: center;
}

.logo {
  font-size: 32px;
  font-weight: bold;
}

.menu-item {
  padding: 0 4px;
  transition: font-size 0.3s ease-in-out;
}

.menu-item:hover {
  font-size: 140%;
}

.nodeco {
  text-decoration: none;
}

.menu-item.active {
  border: 1px solid #ea79d8;
  border-radius: 10px;
  background-color: #550f75;
  color: #ea79d8;
  transition: background-color 0.2s ease-in-out, font-size 0.3s ease-in-out;
}

.menu-item.active:hover {
  background-color: #b421f8;
}

.container {
  max-width: 1280px;
  margin: auto;
  padding-bottom: 10px;
}

.errormes {
  background: #ee4030;
  color: #fcfcfc;
  border: 4px inset #b61729;
  border-radius: 2px;
  padding: 2px;
}

h1.paragraph, p.paragraph {
  text-align: left;
}

footer {
  text-align: center;
}

header, main, footer, .sns:hover {
  border-radius: 2px;
}

/* 入力欄とボタン（ブラウザの白い既定を使わない。:where()なので、個別の指定が優先される） */
html {
  color-scheme: dark;
  accent-color: #c016c6;
}

:where(input:not([type="checkbox"], [type="radio"], [type="range"], [type="color"], [type="image"]), textarea, select, button) {
  background-color: #2b012a;
  color: #fcfcfc;
  border: 1px solid #ea79d8;
  border-radius: 2px;
  padding: 2px 6px;
}

::file-selector-button {
  background-color: #2b012a;
  color: #fcfcfc;
  border: 1px solid #ea79d8;
  border-radius: 2px;
  padding: 2px 6px;
  cursor: pointer;
}

:where(button, input[type="submit"], input[type="button"], input[type="reset"]) {
  cursor: pointer;
}

:where(button, input[type="submit"], input[type="button"], input[type="reset"]):hover, ::file-selector-button:hover {
  background-color: #550f75;
}

:where(input, textarea, select, button):focus-visible {
  outline: 2px solid #ea79d8;
  outline-offset: 1px;
}

:where(input, textarea, select, button):disabled {
  opacity: 0.6;
  cursor: default;
}

::placeholder {
  color: #b0a0b0;
  opacity: 1;
}

@media screen and (max-width: 768px) {
  header, main, footer {
    margin: 10px;
    padding: 5px;
  }
  
  .logo {
    font-size: 28px;
  }
  
  nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 5px;
  }
}

@media screen and (max-width: 480px) {
  header, main, footer {
    margin: 5px;
    padding: 5px;
  }
  
  .logo {
    font-size: 24px;
  }
}