/* ========================================
   Mission puzzle game
======================================== */
.mission-puzzle {
    position: relative;
    z-index: 2;
    margin-top: clamp(8rem, 22vw, 22rem);
    color: var(--color-non);
}

.mission-puzzle__intro {
    max-width: 100rem;
    margin: 0 auto clamp(4rem, 7vw, 6rem);
    text-align: center;
}

.mission-puzzle__intro .level3-basic {
    margin-bottom: clamp(2rem, 3vw, 2.8rem);
}

.mission-puzzle__stage {
    position: relative;
    width: min(100%, 520px);
    aspect-ratio: 1 / 1;
    margin: 0 auto;
    border-radius: 1rem;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.28);
    box-shadow: var(--box-shadow);
}

.mission-puzzle__board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
    gap: 10px;
    width: 100%;
    height: 100%;
    padding: 10px;
    box-sizing: border-box;
    transition: opacity 0.7s var(--easing), visibility 0.7s var(--easing);
}

.mission-puzzle__tile {
    position: relative;
    display: block;
    width: 100%;
    height: 100%;
    padding: 0;
    border: 0;
    border-radius: 0.4rem;
    background-color: rgba(255, 255, 255, 0.08);
    background-image: var(--puzzle-image);
    background-repeat: no-repeat;
    background-size: 300% 300%;
    cursor: pointer;
    appearance: none;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    transition: transform 0.25s var(--easing), box-shadow 0.25s var(--easing), outline-color 0.25s ease;
}

.mission-puzzle__tile:focus-visible {
    outline: 2px solid var(--color-p-brand);
    outline-offset: 2px;
}

.mission-puzzle__tile.is-selected {
    transform: scale(0.96);
    box-shadow: 0 0 0 4px var(--color-brand), 0 0 1.6rem rgba(0, 195, 208, 0.45);
    z-index: 1;
}

.mission-puzzle__tile.is-swapping,
.mission-puzzle__tile.is-clearing {
    pointer-events: none;
    transition: none;
    will-change: transform, filter, box-shadow;
}

.mission-puzzle__tile.is-swapping {
    z-index: 5;
}

/* 未完了ミッションのピースはグレースケール（完了=カラー）。ピースに追従して移動する */
.mission-puzzle__tile.is-locked {
    filter: grayscale(1) brightness(0.7);
}

/* ピース上のMISSION番号（小さめ表示） */
.mission-puzzle__num {
    position: absolute;
    top: 0.4rem;
    left: 0.4rem;
    z-index: 1;
    display: inline-block;
    min-width: 1.6rem;
    padding: 0.2rem 0.4rem;
    border-radius: 0.3rem;
    background: rgba(5, 7, 25, 0.55);
    color: #fff;
    font-family: var(--font-family-en);
    font-size: 1rem;
    line-height: 1;
    letter-spacing: 0.04em;
    text-align: center;
    pointer-events: none;
}

.mission-puzzle__video {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    background: #050719;
}

.mission-puzzle__clear {
    position: absolute;
    top: 50%;
    left: 50%;
    z-index: 3;
    margin: 0;
    padding: 0.8rem 1.6rem;
    border-radius: 999px;
    background: rgba(5, 7, 25, 0.72);
    color: var(--color-non);
    font-family: var(--font-family-en);
    font-size: clamp(1.6rem, 4vw, 2.2rem);
    letter-spacing: 0.16em;
    line-height: 1;
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.mission-puzzle__cta {
    position: absolute;
    left: 50%;
    bottom: 40px;
    z-index: 4;
    width: max-content;
    max-width: calc(100% - 3.2rem);
    margin-top: 0;
    padding-left: clamp(2.4rem, 5vw, 4.8rem);
    padding-right: clamp(2.4rem, 5vw, 4.8rem);
    transform: translateX(-50%);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.mission-puzzle__cta[hidden] {
    display: none;
}

.mission-puzzle.is-video-ended .mission-puzzle__cta {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.mission-puzzle__bar {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.2rem 2.4rem;
    margin-top: 1.6rem;
}

.mission-puzzle__meta {
    margin: 0;
    color: rgba(255, 255, 255, 0.72);
    font-family: var(--font-family-en);
    font-size: 1.3rem;
    letter-spacing: 0.08em;
    text-align: center;
}

.mission-puzzle__actions {
    display: flex;
    align-items: center;
    gap: 1.2rem;
}

.mission-puzzle__btn {
    margin: 0;
    padding: 0.6rem 0.2rem;
    border: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.42);
    border-radius: 0;
    background: transparent;
    color: #fff;
    -webkit-text-fill-color: #fff;
    font-family: var(--font-family-en);
    font-size: 1.3rem;
    letter-spacing: 0.12em;
    line-height: 1;
    cursor: pointer;
    appearance: none;
    transition: color 0.35s var(--easing), border-color 0.35s var(--easing), -webkit-text-fill-color 0.35s var(--easing);
}

.mission-puzzle__btn:hover {
    color: #fff;
    -webkit-text-fill-color: #fff;
    border-bottom-color: var(--color-brand);
}

.mission-puzzle__btn:focus-visible {
    outline: 2px solid var(--color-brand);
    outline-offset: 4px;
}

.mission-puzzle__btn[hidden] {
    display: none;
}

.mission-puzzle.is-cleared .mission-puzzle__board {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.mission-puzzle.is-cleared .mission-puzzle__video {
    opacity: 1;
    visibility: visible;
}

@media (hover: hover) and (pointer: fine) {
    .mission-puzzle__tile:hover {
        transform: scale(0.985);
    }

    .mission-puzzle__tile.is-selected:hover {
        transform: scale(0.96);
    }
}

@media (prefers-reduced-motion: reduce) {
    .mission-puzzle__board,
    .mission-puzzle__tile,
    .mission-puzzle__video {
        transition: none;
    }
}