.hidden {
    display: none;
}

.image-option-btn {
    font-family: 'Times New Roman', Times, serif;
    font-size: 1.28rem;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}

.image-option-btn.w-full {
    padding: 0.82rem 1.25rem;
}

.image-option-btn.is-interactive {
    cursor: pointer;
}

.image-option-btn.is-interactive:hover {
    background-color: #fff7ed;
    border-color: #fdba74;
    box-shadow: 0 8px 18px rgba(249, 115, 22, 0.14);
}

.image-option-btn.is-interactive:active {
    transform: scale(0.98);
}

.image-option-btn.is-selected,
.image-option-btn.is-selected:hover {
    background-color: #dbeafe;
    border-color: #3b82f6;
    color: #1d4ed8;
    box-shadow: 0 10px 22px rgba(59, 130, 246, 0.22);
}

.image-option-btn.is-selected:active {
    transform: scale(0.98);
}

.image-option-btn.is-locked {
    cursor: not-allowed;
}

.letter-btn {
    padding: 0.7rem 1.05rem;
    line-height: 1;
    border-radius: 10px;
    border-width: 0.5px !important;
    border-color: #97bbf7;
    font-family: 'Times New Roman', Times, serif;
    font-size: 1.5rem;
}

#word-input {
    font-family: 'Times New Roman', Times, serif;
    font-size: 1.5rem;
}

.letter-btn.cursor-pointer {
    cursor: pointer;
}

.letter-btn.cursor-not-allowed {
    cursor: not-allowed;
}

.items-start {
    align-items: flex-start;
}

.text-xs {
    font-size: .75rem;
    line-height: 1rem;
}

.leading-snug {
    line-height: 1.375;
}

/* 作答結果一覽（review-list）*/
.review-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    border-radius: 1rem;
    border-width: 2px;
    border-style: solid;
    padding: 0.9rem 1rem;
    background-color: #ffffff;
    box-shadow: 0 2px 6px rgba(15, 23, 42, 0.06);
}

.review-item.is-correct {
    border-color: #86efac;
    background-color: #f0fdf4;
}

.review-item.is-incorrect {
    border-color: #fca5a5;
    background-color: #fef2f2;
}

.review-icon {
    flex: 0 0 auto;
    width: 1.75rem;
    height: 1.75rem;
    border-radius: 9999px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
}

.review-icon svg {
    display: block;
}

.review-item.is-correct .review-icon {
    background-color: #22c55e;
}

.review-item.is-incorrect .review-icon {
    background-color: #ef4444;
}

.review-body {
    flex: 1 1 auto;
    min-width: 0;
}

.review-audio-btn {
    flex: 0 0 auto;
    width: 3rem;
    height: 3rem;
    border-radius: 9999px;
    border: none;
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(37, 99, 235, 0.35);
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.review-audio-btn-icon {
    font-size: 1.35rem;
    line-height: 1;
}

.review-audio-btn:hover {
    box-shadow: 0 6px 14px rgba(37, 99, 235, 0.45);
    transform: scale(1.06);
}

.review-audio-btn:active {
    transform: scale(0.92);
}

.review-audio-btn:disabled {
    background: #cbd5e1;
    box-shadow: none;
    cursor: not-allowed;
}

/*! tailwindcss v3.4.1 | MIT License | https://tailwindcss.com*/
*,
:after,
:before {
    box-sizing: border-box;
    border: 0 solid #e5e7eb
}

:after,
:before {
    --tw-content: ""
}

:host,
html {
    line-height: 1.5;
    -webkit-text-size-adjust: 100%;
    -moz-tab-size: 4;
    -o-tab-size: 4;
    tab-size: 4;
    font-family: ui-sans-serif, system-ui, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol, Noto Color Emoji;
    font-feature-settings: normal;
    font-variation-settings: normal;
    -webkit-tap-highlight-color: transparent
}

body {
    margin: 0;
    line-height: inherit
}

hr {
    height: 0;
    color: inherit;
    border-top-width: 1px
}

abbr:where([title]) {
    -webkit-text-decoration: underline dotted;
    text-decoration: underline dotted
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-size: inherit;
    font-weight: inherit
}

a {
    color: inherit;
    text-decoration: inherit
}

b,
strong {
    font-weight: bolder
}

code,
kbd,
pre,
samp {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, Liberation Mono, Courier New, monospace;
    font-feature-settings: normal;
    font-variation-settings: normal;
    font-size: 1em
}

small {
    font-size: 80%
}

sub,
sup {
    font-size: 75%;
    line-height: 0;
    position: relative;
    vertical-align: initial
}

sub {
    bottom: -.25em
}

sup {
    top: -.5em
}

table {
    text-indent: 0;
    border-color: inherit;
    border-collapse: collapse
}

button,
input,
optgroup,
select,
textarea {
    font-family: inherit;
    font-feature-settings: inherit;
    font-variation-settings: inherit;
    font-size: 100%;
    font-weight: inherit;
    line-height: inherit;
    color: inherit;
    margin: 0;
    padding: 0
}

button,
select {
    text-transform: none
}

[type=button],
[type=reset],
[type=submit],
button {
    -webkit-appearance: button;
    background-color: initial;
    background-image: none
}

:-moz-focusring {
    outline: auto
}

:-moz-ui-invalid {
    box-shadow: none
}

progress {
    vertical-align: initial
}

::-webkit-inner-spin-button,
::-webkit-outer-spin-button {
    height: auto
}

[type=search] {
    -webkit-appearance: textfield;
    outline-offset: -2px
}

::-webkit-search-decoration {
    -webkit-appearance: none
}

::-webkit-file-upload-button {
    -webkit-appearance: button;
    font: inherit
}

summary {
    display: list-item
}

blockquote,
dd,
dl,
figure,
h1,
h2,
h3,
h4,
h5,
h6,
hr,
p,
pre {
    margin: 0
}

fieldset {
    margin: 0
}

fieldset,
legend {
    padding: 0
}

menu,
ol,
ul {
    list-style: none;
    margin: 0;
    padding: 0
}

dialog {
    padding: 0
}

textarea {
    resize: vertical
}

input::-moz-placeholder,
textarea::-moz-placeholder {
    opacity: 1;
    color: #9ca3af
}

input::placeholder,
textarea::placeholder {
    opacity: 1;
    color: #9ca3af
}

[role=button],
button {
    cursor: pointer
}

:disabled {
    cursor: default
}

audio,
canvas,
embed,
iframe,
img,
object,
svg,
video {
    display: block;
    vertical-align: middle
}

img,
video {
    max-width: 100%;
    height: auto
}

[hidden] {
    display: none
}

*,
::backdrop,
:after,
:before {
    --tw-border-spacing-x: 0;
    --tw-border-spacing-y: 0;
    --tw-translate-x: 0;
    --tw-translate-y: 0;
    --tw-rotate: 0;
    --tw-skew-x: 0;
    --tw-skew-y: 0;
    --tw-scale-x: 1;
    --tw-scale-y: 1;
    --tw-pan-x: ;
    --tw-pan-y: ;
    --tw-pinch-zoom: ;
    --tw-scroll-snap-strictness: proximity;
    --tw-gradient-from-position: ;
    --tw-gradient-via-position: ;
    --tw-gradient-to-position: ;
    --tw-ordinal: ;
    --tw-slashed-zero: ;
    --tw-numeric-figure: ;
    --tw-numeric-spacing: ;
    --tw-numeric-fraction: ;
    --tw-ring-inset: ;
    --tw-ring-offset-width: 0px;
    --tw-ring-offset-color: #fff;
    --tw-ring-color: #3b82f680;
    --tw-ring-offset-shadow: 0 0 #0000;
    --tw-ring-shadow: 0 0 #0000;
    --tw-shadow: 0 0 #0000;
    --tw-shadow-colored: 0 0 #0000;
    --tw-blur: ;
    --tw-brightness: ;
    --tw-contrast: ;
    --tw-grayscale: ;
    --tw-hue-rotate: ;
    --tw-invert: ;
    --tw-saturate: ;
    --tw-sepia: ;
    --tw-drop-shadow: ;
    --tw-backdrop-blur: ;
    --tw-backdrop-brightness: ;
    --tw-backdrop-contrast: ;
    --tw-backdrop-grayscale: ;
    --tw-backdrop-hue-rotate: ;
    --tw-backdrop-invert: ;
    --tw-backdrop-opacity: ;
    --tw-backdrop-saturate: ;
    --tw-backdrop-sepia:
}

.mx-auto {
    margin-left: auto;
    margin-right: auto
}

.mb-2 {
    margin-bottom: .5rem
}

.mb-3 {
    margin-bottom: .75rem
}

.mb-4 {
    margin-bottom: 1rem
}

.mb-6 {
    margin-bottom: 1.5rem
}

.mt-4 {
    margin-top: 1rem
}

.block {
    display: block
}

.flex {
    display: flex
}

.hidden {
    display: none
}

.h-48 {
    height: 12rem
}

.h-full {
    height: 100%
}

.min-h-\[12rem\] {
    min-height: 12rem
}

.min-h-screen {
    min-height: 100vh
}

.w-full {
    width: 100%
}

.max-w-md {
    max-width: 28rem
}

.flex-1 {
    flex: 1 1 0%
}

.flex-grow {
    flex-grow: 1
}

.flex-col {
    flex-direction: column
}

.flex-wrap {
    flex-wrap: wrap
}

.items-center {
    align-items: center
}

.justify-center {
    justify-content: center
}

.justify-between {
    justify-content: space-between
}

.gap-2 {
    gap: .5rem
}

.gap-3 {
    gap: .75rem
}

.gap-4 {
    gap: 1rem
}

.space-y-3>:not([hidden])~:not([hidden]) {
    --tw-space-y-reverse: 0;
    margin-top: calc(.75rem*(1 - var(--tw-space-y-reverse)));
    margin-bottom: calc(.75rem*var(--tw-space-y-reverse))
}

.space-y-4>:not([hidden])~:not([hidden]) {
    --tw-space-y-reverse: 0;
    margin-top: calc(1rem*(1 - var(--tw-space-y-reverse)));
    margin-bottom: calc(1rem*var(--tw-space-y-reverse))
}

.overflow-hidden {
    overflow: hidden
}

.break-words {
    overflow-wrap: break-word
}

.rounded-2xl {
    border-radius: 1rem
}

.rounded-3xl {
    border-radius: 1.5rem
}

.border {
    border-width: 1px
}

.border-2 {
    border-width: 2px
}

.border-t-8 {
    border-top-width: 8px
}

.border-blue-200 {
    --tw-border-opacity: 1;
    border-color: rgb(191 219 254/var(--tw-border-opacity))
}

.border-orange-100 {
    --tw-border-opacity: 1;
    border-color: rgb(255 237 213/var(--tw-border-opacity))
}

.border-orange-200 {
    --tw-border-opacity: 1;
    border-color: rgb(254 215 170/var(--tw-border-opacity))
}

.border-orange-500 {
    --tw-border-opacity: 1;
    border-color: rgb(249 115 22/var(--tw-border-opacity))
}

.border-slate-200 {
    --tw-border-opacity: 1;
    border-color: rgb(226 232 240/var(--tw-border-opacity))
}

.bg-blue-50 {
    --tw-bg-opacity: 1;
    background-color: rgb(239 246 255/var(--tw-bg-opacity))
}

.bg-blue-500 {
    --tw-bg-opacity: 1;
    background-color: rgb(59 130 246/var(--tw-bg-opacity))
}

.bg-gray-100 {
    --tw-bg-opacity: 1;
    background-color: rgb(243 244 246/var(--tw-bg-opacity))
}

.bg-green-600 {
    --tw-bg-opacity: 1;
    background-color: rgb(22 163 74/var(--tw-bg-opacity))
}

.bg-orange-50 {
    --tw-bg-opacity: 1;
    background-color: rgb(255 247 237/var(--tw-bg-opacity))
}

.bg-orange-500 {
    --tw-bg-opacity: 1;
    background-color: rgb(249 115 22/var(--tw-bg-opacity))
}

.bg-orange-600 {
    --tw-bg-opacity: 1;
    background-color: rgb(234 88 12/var(--tw-bg-opacity))
}

.bg-slate-100 {
    --tw-bg-opacity: 1;
    background-color: rgb(241 245 249/var(--tw-bg-opacity))
}

.bg-slate-50 {
    --tw-bg-opacity: 1;
    background-color: rgb(248 250 252/var(--tw-bg-opacity))
}

.bg-slate-800 {
    --tw-bg-opacity: 1;
    background-color: rgb(30 41 59/var(--tw-bg-opacity))
}

.bg-white {
    --tw-bg-opacity: 1;
    background-color: rgb(255 255 255/var(--tw-bg-opacity))
}

.object-contain {
    -o-object-fit: contain;
    object-fit: contain
}

.p-10 {
    padding: 2.5rem
}

.p-4 {
    padding: 1rem
}

.p-5 {
    padding: 1.25rem
}

.p-6 {
    padding: 1.5rem
}

.pb-2 {
    padding-bottom: .5rem
}

.px-2 {
    padding-left: .5rem;
    padding-right: .5rem
}

.px-4 {
    padding-left: 1rem;
    padding-right: 1rem
}

.py-3 {
    padding-top: .75rem;
    padding-bottom: .75rem
}

.py-4 {
    padding-top: 1rem;
    padding-bottom: 1rem
}

.py-6 {
    padding-top: 1.5rem;
    padding-bottom: 1.5rem
}

.text-left {
    text-align: left
}

.text-center {
    text-align: center
}

.text-right {
    text-align: right
}

.font-sans {
    font-family: ui-sans-serif, system-ui, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol, Noto Color Emoji
}

.text-2xl {
    font-size: 1.5rem;
    line-height: 2rem
}

.text-4xl {
    font-size: 2.25rem;
    line-height: 2.5rem
}

.text-6xl {
    font-size: 3.75rem;
    line-height: 1
}

.text-base {
    font-size: 1rem;
    line-height: 1.5rem
}

.text-lg {
    font-size: 1.125rem;
    line-height: 1.75rem
}

.text-sm {
    font-size: .875rem;
    line-height: 1.25rem
}

.font-bold {
    font-weight: 700
}

.font-medium {
    font-weight: 500
}

.text-blue-600 {
    --tw-text-opacity: 1;
    color: rgb(37 99 235/var(--tw-text-opacity))
}

.text-blue-800 {
    --tw-text-opacity: 1;
    color: rgb(30 64 175/var(--tw-text-opacity))
}

.text-gray-500 {
    --tw-text-opacity: 1;
    color: rgb(107 114 128/var(--tw-text-opacity))
}

.text-gray-600 {
    --tw-text-opacity: 1;
    color: rgb(75 85 99/var(--tw-text-opacity))
}

.text-gray-700 {
    --tw-text-opacity: 1;
    color: rgb(55 65 81/var(--tw-text-opacity))
}

.text-orange-600 {
    --tw-text-opacity: 1;
    color: rgb(234 88 12/var(--tw-text-opacity))
}

.text-white {
    --tw-text-opacity: 1;
    color: rgb(255 255 255/var(--tw-text-opacity))
}

.shadow-2xl {
    --tw-shadow: 0 25px 50px -12px #00000040;
    --tw-shadow-colored: 0 25px 50px -12px var(--tw-shadow-color)
}

.shadow-2xl,
.shadow-lg {
    box-shadow: var(--tw-ring-offset-shadow, 0 0 #0000), var(--tw-ring-shadow, 0 0 #0000), var(--tw-shadow)
}

.shadow-lg {
    --tw-shadow: 0 10px 15px -3px #0000001a, 0 4px 6px -4px #0000001a;
    --tw-shadow-colored: 0 10px 15px -3px var(--tw-shadow-color), 0 4px 6px -4px var(--tw-shadow-color)
}

.shadow-xl {
    --tw-shadow: 0 20px 25px -5px #0000001a, 0 8px 10px -6px #0000001a;
    --tw-shadow-colored: 0 20px 25px -5px var(--tw-shadow-color), 0 8px 10px -6px var(--tw-shadow-color);
    box-shadow: var(--tw-ring-offset-shadow, 0 0 #0000), var(--tw-ring-shadow, 0 0 #0000), var(--tw-shadow)
}

.transition {
    transition-property: color, background-color, border-color, text-decoration-color, fill, stroke, opacity, box-shadow, transform, filter, -webkit-backdrop-filter;
    transition-property: color, background-color, border-color, text-decoration-color, fill, stroke, opacity, box-shadow, transform, filter, backdrop-filter;
    transition-property: color, background-color, border-color, text-decoration-color, fill, stroke, opacity, box-shadow, transform, filter, backdrop-filter, -webkit-backdrop-filter;
    transition-timing-function: cubic-bezier(.4, 0, .2, 1);
    transition-duration: .15s
}

.hover\:bg-orange-50:hover {
    --tw-bg-opacity: 1;
    background-color: rgb(255 247 237/var(--tw-bg-opacity))
}

.focus\:border-blue-500:focus {
    --tw-border-opacity: 1;
    border-color: rgb(59 130 246/var(--tw-border-opacity))
}

.focus\:border-orange-500:focus {
    --tw-border-opacity: 1;
    border-color: rgb(249 115 22/var(--tw-border-opacity))
}

.focus\:bg-white:focus {
    --tw-bg-opacity: 1;
    background-color: rgb(255 255 255/var(--tw-bg-opacity))
}

.focus\:outline-none:focus {
    outline: 2px solid #0000;
    outline-offset: 2px
}

.active\:scale-95:active {
    --tw-scale-x: .95;
    --tw-scale-y: .95;
    transform: translate(var(--tw-translate-x), var(--tw-translate-y)) rotate(var(--tw-rotate)) skewX(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y))
}

.disabled\:bg-gray-300:disabled {
    --tw-bg-opacity: 1;
    background-color: rgb(209 213 219/var(--tw-bg-opacity))
}

@media (min-width:640px) {
    .sm\:text-lg {
        font-size: 1.125rem;
        line-height: 1.75rem
    }
}

.h-auto {
    height: auto
}

.h-10 {
    height: 2.5rem
}

.h-40 {
    height: 10rem
}

.px-10 {
    padding-left: 2.5rem;
    padding-right: 2.5rem
}

.pt-2 {
    padding-top: .5rem
}

.pb-6 {
    padding-bottom: 1.5rem
}

.relative {
    position: relative
}

.absolute {
    position: absolute
}

.top-0 {
    top: 0
}

.bottom-0 {
    bottom: 0
}

.right-0 {
    right: 0
}

.w-1\/2 {
    width: 50%
}

.z-10 {
    z-index: 10
}

.w-auto {
    width: auto
}

.max-w-full {
    max-width: 100%
}

.opacity-60 {
    opacity: .6
}

.pointer-events-none {
    pointer-events: none
}

@keyframes pulse {
    50% {
        opacity: .5
    }
}

.animate-pulse {
    animation: pulse 2s cubic-bezier(.4,0,.6,1) infinite
}

.disabled\:opacity-50:disabled {
    opacity: .5
}