/* =================================================================
   あんきカード（kids-flashcard）専用スタイル
   すべて #app-kids-flashcard 配下にスコープする
   ================================================================= */

#app-kids-flashcard {
    /* こども向けに文字を少し大きめ・行間ゆったり */
    --kf-accent: var(--bs-primary);
}

/* ---------- デッキ一覧カード ---------- */
#app-kids-flashcard .kf-deck-card {
    border: 2px solid var(--bs-border-color);
    border-top: 6px solid var(--kf-deck-color, var(--bs-primary));
    border-radius: 1rem;
    transition: transform .15s ease, box-shadow .15s ease;
}

@media (hover: hover) { #app-kids-flashcard .kf-deck-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 .5rem 1rem rgba(0, 0, 0, .12);
} }

#app-kids-flashcard .kf-deck-dot {
    width: 1rem;
    height: 1rem;
    border-radius: 50%;
    display: inline-block;
    background: var(--kf-deck-color, var(--bs-primary));
    flex: 0 0 auto;
}

#app-kids-flashcard .kf-deck-progress {
    height: 8px;
    border-radius: 4px;
}

/* ---------- いろピッカー ---------- */
#app-kids-flashcard .kf-swatch {
    width: 2.4rem;
    height: 2.4rem;
    border-radius: 50%;
    border: 3px solid transparent;
    cursor: pointer;
    padding: 0;
    transition: transform .1s ease;
}

@media (hover: hover) { #app-kids-flashcard .kf-swatch:hover {
    transform: scale(1.1);
} }

#app-kids-flashcard .kf-swatch.is-selected {
    border-color: var(--bs-body-color);
    box-shadow: 0 0 0 2px var(--bs-body-bg) inset;
}

/* ---------- カード編集行 ---------- */
#app-kids-flashcard .kf-card-row {
    background: var(--bs-body-tertiary-bg, var(--bs-tertiary-bg));
    border: 1px solid var(--bs-border-color);
    border-radius: .75rem;
    padding: .75rem;
    margin-bottom: .6rem;
}

#app-kids-flashcard .kf-row-num {
    min-width: 2rem;
    font-weight: 700;
    color: var(--bs-secondary-color);
}

/* ---------- 3D フリップカード（めくる／テスト共通） ---------- */
#app-kids-flashcard .flip-card {
    width: 100%;
    max-width: 460px;
    aspect-ratio: 4 / 3;
    perspective: 1400px;
    cursor: pointer;
    outline: none;
}

#app-kids-flashcard .flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform .5s cubic-bezier(.4, .2, .2, 1);
    transform-style: preserve-3d;
}

#app-kids-flashcard .flip-card.is-flipped .flip-card-inner {
    transform: rotateY(180deg);
}

#app-kids-flashcard .flip-face {
    position: absolute;
    inset: 0;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1.25rem;
    border-radius: 1.25rem;
    border: 3px solid var(--kf-deck-color, var(--bs-primary));
    background: var(--bs-body-bg);
    color: var(--bs-body-color);
    box-shadow: 0 .4rem 1rem rgba(0, 0, 0, .1);
    text-align: center;
    overflow: hidden;
}

#app-kids-flashcard .flip-front {
    /* おもて面はデッキ色をほんのり乗せる */
    background:
        linear-gradient(0deg, color-mix(in srgb, var(--kf-deck-color, var(--bs-primary)) 8%, transparent), transparent),
        var(--bs-body-bg);
}

#app-kids-flashcard .flip-back {
    transform: rotateY(180deg);
    background:
        linear-gradient(0deg, color-mix(in srgb, var(--kf-deck-color, var(--bs-primary)) 14%, transparent), transparent),
        var(--bs-body-bg);
}

#app-kids-flashcard .kf-face-label {
    position: absolute;
    top: .6rem;
    left: .9rem;
    font-size: .75rem;
    font-weight: 700;
    color: var(--bs-secondary-color);
    letter-spacing: .05em;
}

#app-kids-flashcard .kf-face-text {
    font-weight: 800;
    line-height: 1.25;
    /* 文字数に応じて自動でフィット */
    font-size: clamp(1.8rem, 8vw, 3.2rem);
    word-break: break-word;
    max-height: 100%;
}

/* 長文カードのとき小さめに */
#app-kids-flashcard .flip-face.kf-long .kf-face-text {
    font-size: clamp(1.1rem, 4.5vw, 1.6rem);
}

#app-kids-flashcard .kf-tap-hint {
    position: absolute;
    bottom: .6rem;
    left: 0;
    right: 0;
    font-size: .8rem;
    color: var(--bs-secondary-color);
    opacity: .85;
}

/* めくる前のほのかな揺れで「押せる」を伝える */
#app-kids-flashcard .flip-card:not(.is-flipped) .flip-card-inner {
    animation: kf-nudge 2.4s ease-in-out infinite;
}

@keyframes kf-nudge {
    0%, 92%, 100% { transform: none; }
    96% { transform: rotateY(-8deg); }
}

/* スワイプ中の横移動 */
#app-kids-flashcard .flip-card.kf-swiping .flip-card-inner {
    animation: none;
    transition: none;
}

/* ---------- 正解セレブレーション ---------- */
#app-kids-flashcard .kf-celebrate {
    text-align: center; /* 演出は画面の中央に出す */
    font-size: 3.5rem;
    animation: kf-pop .6s cubic-bezier(.2, 1.4, .4, 1);
}

@keyframes kf-pop {
    0% { transform: scale(0); opacity: 0; }
    60% { transform: scale(1.25); opacity: 1; }
    100% { transform: scale(1); }
}

/* テストで「わかった」判定時のフラッシュ */
#app-kids-flashcard .kf-flash-known {
    animation: kf-flash-ok .5s ease;
}

@keyframes kf-flash-ok {
    0% { box-shadow: 0 0 0 0 rgba(var(--bs-success-rgb), .6); }
    100% { box-shadow: 0 0 0 24px rgba(var(--bs-success-rgb), 0); }
}

/* ---------- クイズ モード ---------- */
#app-kids-flashcard .kf-quiz-card {
    position: relative;
    width: 100%;
    max-width: 460px;
    min-height: 8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem 1.25rem;
    border-radius: 1.25rem;
    border: 3px solid var(--bs-info);
    background:
        linear-gradient(0deg, color-mix(in srgb, var(--bs-info) 8%, transparent), transparent),
        var(--bs-body-bg);
    color: var(--bs-body-color);
    box-shadow: 0 .4rem 1rem rgba(0, 0, 0, .1);
    text-align: center;
}

/* こたえは 2×2 に置いて、たてに のびないようにする */
#app-kids-flashcard .kf-quiz-options {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: .5rem;
    max-width: 460px;
    margin-inline: auto;
}
/* こたえが 3つ など奇数のときは、最後の1つを横いっぱいに */
#app-kids-flashcard .kf-quiz-options > .kf-quiz-opt:last-child:nth-child(odd) {
    grid-column: 1 / -1;
}

#app-kids-flashcard .kf-quiz-opt {
    font-weight: 700;
    padding-top: .8rem;
    padding-bottom: .8rem;
    white-space: normal;
    word-break: break-word;
}

/* ヘッダーの「もどる」は縮めない（「←もど / る」と折り返さないように） */
#app-kids-flashcard .kf-back {
    flex-shrink: 0;
    white-space: nowrap;
}

#app-kids-flashcard .kf-quiz-feedback {
    text-align: center; /* 演出は画面の中央に出す */
    min-height: 1.7rem;
    font-size: 1.15rem;
}

/* ---------- モバイル調整 ---------- */
@media (max-width: 575.98px) {
    #app-kids-flashcard .flip-card {
        max-width: 100%;
    }

    #app-kids-flashcard .kf-face-text {
        font-size: clamp(1.6rem, 11vw, 2.6rem);
    }
}

/* アニメを控えたい設定を尊重 */
@media (prefers-reduced-motion: reduce) {
    #app-kids-flashcard .flip-card:not(.is-flipped) .flip-card-inner {
        animation: none;
    }

    #app-kids-flashcard .flip-card-inner {
        transition: none;
    }
}