input:disabled {
  pointer-events: none;
}

input:disabled + label {
  pointer-events: none;
}

.contents-wrap {
  padding-bottom: 300px;
}

@media screen and (max-width: 768px) {
  .contents-wrap {
    padding-bottom: calc(300px + env(safe-area-inset-bottom));
  }
}

.panel-header {
  padding: 0.9rem 1rem 0.9rem 1.5rem;
  display: flex;
  flex-direction: row;
  align-items: center;
  border-bottom: 1px solid #ddd;
}

.panel-header button {
  background-color: #fff;
  border: none;
}

.drill-panel {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  height: 3rem;
  text-align: start;
  font-size: 20px;
  font-weight: bold;
}

@media screen and (max-width: 768px) {
  .drill-panel {
    padding-top: 0.5rem;
  }
}

.drill-panel.no-child {
  pointer-events: none;
}

.drill-panel span {
  display: inline-block;
  vertical-align: middle;
}

.title-wrap {
  display: flex;
  flex-grow: 1;
  height: 100%;
  align-items: center;
}

.title {
  padding-left: 3rem;
}

body.nc1 .title {
  color: var(--nc1-main-color);
}

body.nc2 .title {
  color: var(--nc2-main-color);
}

body.nc3 .title {
  color: var(--nc3-main-color);
}

button[aria-expanded="false"] .toggle::before {
  font-size: 1.1em;
  font-family: fontAwesome;
  content: "\2b";
  float: right;
}

button[aria-expanded="true"] .toggle::after {
  font-size: 1.25em;
  font-family: fontAwesome;
  content: "\f068";
  float: right;
}

body.nc1 button .toggle::before,
body.nc1 button .toggle::after {
  color: var(--nc1-main-color); 
}

body.nc2 button .toggle::before,
body.nc2 button .toggle::after {
  color: var(--nc2-main-color); 
}

body.nc3 button .toggle::before,
body.nc3 button .toggle::after {
  color: var(--nc3-main-color); 
}

.panel-body {
  border-bottom: 1px solid #ddd;
}

.panel-body > div {
  padding: 0.3rem 0 0.3rem 4rem;
}

@media screen and (max-width: 578px) {
  .panel-body > div {
    padding: 0.7rem 0 0.7rem 4rem;
  }
}

.subtitle {
  font-family: "UDDigi";
  width: 100%;
  line-height: 3rem;
  font-size: 16px;
  padding-left: 3rem;
}

/*----------------------------------------------------------------
  フラッシュカードコントロール
-----------------------------------------------------------------*/

/* 横幅がiPad（768px）未満の場合 */
@media (max-width: 767px) {
  .fcindex-controls {
    font-size: 15px;
  }
}

@supports (margin-bottom: env(safe-area-inset-bottom)) {
  .fcindex-controls {
    bottom: env(safe-area-inset-bottom);
  }
}

.fcindex-controls button:disabled {
  opacity: 0.5;
  cursor: default;
}

.fcindex-top-wrap,
.fcindex-middle-wrap {
  margin-bottom: 0.5rem;
  padding: 0.3rem 2rem;
  border-radius: var(--border-radius);
  background-color: var(--color);
}

body.nc1 .fcindex-top-wrap,
body.nc1 .fcindex-middle-wrap {
  --color: var(--nc1-bg-color);
}

body.nc2 .fcindex-top-wrap,
body.nc2 .fcindex-middle-wrap {
  --color: var(--nc2-bg-color);
}

body.nc3 .fcindex-top-wrap,
body.nc3 .fcindex-middle-wrap {
  --color: var(--nc3-bg-color);
}

.fcindex-order__item {
  text-align: center;
  padding: 0.25rem;
}

.fcindex-order-label {
  display: inline-block;
  width: 100%;
  border: 2px solid var(--color);
  background-color: #fff;
  border-radius: var(--button-border-radius);
  color: var(--color);
  line-height: 2.7rem;
  height: 2.7rem;
}

@media screen and (max-width: 768px) {
  .fcindex-order-label {
    line-height: 3rem;
    height: 3rem;
  }
}

body.nc1 .fcindex-order-label {
  --color: var(--nc1-main-color);
}

body.nc2 .fcindex-order-label {
  --color: var(--nc2-main-color);
}

body.nc3 .fcindex-order-label {
  --color: var(--nc3-main-color);
}

.fcindex-order-label.selected {
  background-color: var(--bg-color);
  color:#fff;
}

.fcindex-order-label.selected i {
  color:#fff;
}

body.nc1 .fcindex-order-label.selected {
  --bg-color: var(--nc1-main-color);
}

body.nc2 .fcindex-order-label.selected {
  --bg-color: var(--nc2-main-color);
}

body.nc3 .fcindex-order-label.selected {
  --bg-color: var(--nc3-main-color);
}

.fcindex-order__item i {
  color: var(--color);
}

.fcindex-bottom-wrap {
  margin: 0 1rem;
  padding: 0 0.5rem;
  justify-content: space-between;
}

.fcindex-random {
  margin-bottom: 0.5rem;
}

.random-label {
  padding-left: 3rem;
}

@media screen and (max-width: 768px) {
  .random-label {
    padding-top: 0.5rem;
  }
}

.fcindex-close-btn,
.fcindex-start-btn {
  border-radius: var(--button-border-radius);
  text-align: center;
  text-decoration: none;
  letter-spacing: 0.5px;
  line-height: 3rem;
  height: 3rem;
  display: block;
}

.fcindex-close-btn {
  color: #fff;
  background-color: var(--gray-color);
  border: none;
  width: calc(100% - 0.5rem);
}

.fcindex-close-btn:active {
  background-color: #5c5c5c;
  box-shadow: 0 0 0 4px #c2c2c2;
}

.fcindex-start-btn {
  color: #fff;
  background-color: var(--color);
  border: none;
  width: 100%;
}

body.nc1 .fcindex-start-btn {
  --color: var(--nc1-main-color);
}

body.nc2 .fcindex-start-btn {
  --color: var(--nc2-main-color);
}

body.nc3 .fcindex-start-btn {
  --color: var(--nc3-main-color);
}

.fcindex-start-btn {
  position: relative;
}

.fcindex-start-btn::after {
  content: "";
  display: block;
  width: 22px;
  height: 36px;
  margin: auto;
  position: absolute;
  top: 0;
  bottom: 0;
  right: 8px;
  background-image: url(../images/chevron-right_white.svg);
  background-position: center;
  background-size: 10px;
  background-repeat: no-repeat;
}