/**
 * カードスタイル - モダン・プレミアム・カジノテーマ
 *
 * 高品質なトランプカード、滑らかな3Dアニメーション、リッチな状態フィードバック
 */

/* ============================================
 * 3Dカード構造
 * ============================================ */
.card-wrapper {
    perspective: var(--perspective);
}

.card {
    width: var(--card-width);
    height: var(--card-height);
    aspect-ratio: 7 / 10;
    background: var(--color-white);
    border-radius: clamp(4px, 1vmin, var(--radius-md));
    box-shadow:
        var(--shadow-lg),
        0 0 0 1px rgba(0, 0, 0, 0.1);
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: var(--spacing-2);
    font-family: var(--font-family);
    user-select: none;
    transition: transform var(--transition-normal);
    transform-style: preserve-3d;
}

/* カード表面と裏面 */
.card-front,
.card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    backface-visibility: hidden;
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: var(--spacing-2);
    box-sizing: border-box;
}

/* カード表面 */
.card-front {
    background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
    box-shadow:
        var(--shadow-lg),
        inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.card-front.red {
    color: var(--color-card-red);
}

.card-front.black {
    color: var(--color-card-black);
}

/* カード裏面 - プレミアムデザイン */
.card-back {
    transform: rotateY(180deg);
    background: linear-gradient(135deg, #1E3A8A 0%, #1E40AF 50%, #172554 100%);
    border: 2px solid #3B82F6;
    box-shadow:
        var(--shadow-lg),
        inset 0 0 30px rgba(59, 130, 246, 0.2);
}

.card-back::before {
    content: '';
    position: absolute;
    inset: 8px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-sm);
    background:
        repeating-linear-gradient(
            45deg,
            transparent,
            transparent 5px,
            rgba(255, 255, 255, 0.05) 5px,
            rgba(255, 255, 255, 0.05) 10px
        );
}

/* カードのフリップ */
.card.flipped {
    transform: rotateY(180deg);
}

/* ============================================
 * カードサイズバリエーション
 * ============================================ */
.card.small {
    width: var(--card-width-sm);
    height: var(--card-height-sm);
    padding: var(--spacing-1);
}

.card.large {
    width: var(--card-width-lg);
    height: var(--card-height-lg);
    padding: var(--spacing-3);
}

.card.red {
    color: var(--color-card-red);
}

.card.black {
    color: var(--color-card-black);
}

/* Face down card */
.card.face-down {
    background: linear-gradient(135deg, #1E3A8A 0%, #1E40AF 50%, #172554 100%);
    border: 2px solid #3B82F6;
}

.card.face-down::before {
    content: '';
    position: absolute;
    inset: 8px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-sm);
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 5px,
        rgba(255, 255, 255, 0.05) 5px,
        rgba(255, 255, 255, 0.05) 10px
    );
}

/* Card corners */
.card-corner {
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: 1;
}

.card-corner.top-left {
    align-self: flex-start;
}

.card-corner.bottom-right {
    align-self: flex-end;
    transform: rotate(180deg);
}

.card-corner .rank {
    font-size: clamp(10px, 2.5vmin, var(--font-size-md));
    font-weight: var(--font-weight-bold);
}

.card-corner .suit {
    font-size: clamp(8px, 2vmin, var(--font-size-sm));
}

.card.small .card-corner .rank {
    font-size: clamp(8px, 2vmin, var(--font-size-sm));
}

.card.small .card-corner .suit {
    font-size: clamp(6px, 1.5vmin, var(--font-size-xs));
}

.card.large .card-corner .rank {
    font-size: clamp(12px, 3vmin, var(--font-size-xl));
}

.card.large .card-corner .suit {
    font-size: clamp(10px, 2.5vmin, var(--font-size-md));
}

/* Card center */
.card-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: clamp(16px, 5vmin, var(--font-size-3xl));
}

.card.small .card-center {
    font-size: clamp(12px, 3.5vmin, var(--font-size-xl));
}

.card.large .card-center {
    font-size: clamp(20px, 6vmin, var(--font-size-4xl));
}

/* ============================================
 * Hand (collection of cards)
 * ============================================ */
.hand {
    display: flex;
    gap: calc(var(--card-width) * -0.4);
    align-items: center;
    justify-content: center;
    padding: var(--spacing-responsive-sm);
}

.hand.small {
    gap: calc(var(--card-width-sm) * -0.4);
}

.hand.large {
    gap: calc(var(--card-width-lg) * -0.3);
}

.hand .card {
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.hand .card:hover {
    transform: translateY(-10px) scale(1.02);
    z-index: 10;
    box-shadow: var(--shadow-xl), var(--glow-white);
}

/* ============================================
 * カードアニメーション
 * ============================================ */

/* Deal Animation */
@keyframes dealFromDeck {
    0% {
        opacity: 0;
        transform: translate(-50%, -200px) rotate(-15deg) scale(0.7);
    }
    60% {
        opacity: 1;
        transform: translate(0, 10px) rotate(3deg) scale(1.02);
    }
    100% {
        opacity: 1;
        transform: translate(0, 0) rotate(0) scale(1);
    }
}

.card.dealing {
    animation: dealFromDeck var(--animation-deal) var(--ease-spring) forwards;
}

/* Hit Animation */
@keyframes hitCard {
    0% {
        opacity: 0;
        transform: translateX(150px) rotate(20deg) scale(0.8);
    }
    100% {
        opacity: 1;
        transform: translateX(0) rotate(0) scale(1);
    }
}

.card.hitting {
    animation: hitCard var(--animation-hit) var(--ease-decelerate) forwards;
}

/* Draw from deck animation */
@keyframes drawFromDeck {
    0% {
        opacity: 0;
        transform: translate(calc(50vw - 100%), -100px) rotate(-30deg) scale(0.6);
    }
    30% {
        opacity: 1;
        transform: translate(calc(25vw - 50%), -50px) rotate(-15deg) scale(0.8);
    }
    70% {
        transform: translate(20px, 10px) rotate(5deg) scale(1.02);
    }
    100% {
        opacity: 1;
        transform: translate(0, 0) rotate(0) scale(1);
    }
}

.card.drawing {
    animation: drawFromDeck 0.5s var(--ease-spring) forwards;
}

/* Flip Animation */
.card {
    transition: transform var(--animation-flip) var(--ease-spring);
}

.card.animating {
    transition: transform var(--animation-flip) var(--ease-spring);
}

/* ============================================
 * Hand value display
 * ============================================ */
.hand-value {
    position: relative;
    margin-top: var(--spacing-2);
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    color: var(--color-white);
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--radius-full);
    font-size: var(--font-size-responsive-sm);
    font-weight: var(--font-weight-bold);
    white-space: nowrap;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.hand-value.blackjack {
    background: linear-gradient(135deg, #FBBF24 0%, #F59E0B 100%);
    color: var(--color-black);
    border-color: var(--color-neon-gold);
    box-shadow: var(--glow-gold);
    animation: valueGlow 1.5s ease-in-out infinite;
}

@keyframes valueGlow {
    0%, 100% {
        box-shadow: var(--glow-gold);
    }
    50% {
        box-shadow: 0 0 30px rgba(251, 191, 36, 0.8);
    }
}

.hand-value.bust {
    background: linear-gradient(135deg, #EF4444 0%, #DC2626 100%);
    border-color: var(--color-danger);
}

/* ============================================
 * 状態フィードバックアニメーション
 * ============================================ */

/* Bust */
@keyframes bustShake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.hand.bust .card {
    animation: bustShake 0.5s ease-in-out;
    filter: brightness(0.9);
}

.hand.bust {
    position: relative;
}

.hand.bust::after {
    content: 'BUST';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    font-family: var(--font-family);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-danger);
    animation: scaleIn 0.4s var(--ease-spring) 0.3s forwards;
    z-index: 20;
    text-shadow:
        0 2px 10px var(--color-bust-overlay),
        0 0 30px rgba(239, 68, 68, 0.5);
}

@keyframes scaleIn {
    from { transform: translate(-50%, -50%) scale(0); }
    to { transform: translate(-50%, -50%) scale(1); }
}

/* Blackjack */
@keyframes blackjackGlow {
    0%, 100% {
        box-shadow: 0 0 20px var(--color-blackjack-glow);
    }
    50% {
        box-shadow: 0 0 40px var(--color-blackjack-glow), 0 0 60px rgba(251, 191, 36, 0.4);
    }
}

.hand.blackjack .card {
    animation: blackjackGlow 1.5s ease-in-out infinite;
}

/* Win */
@keyframes winPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.hand.win .card {
    animation: winPulse 0.6s ease-in-out;
    box-shadow: var(--shadow-lg), var(--glow-green);
}

/* Lose */
.hand.lose .card {
    filter: grayscale(0.7) brightness(0.7);
    transition: filter 0.5s ease;
}

/* GPU optimization */
.card.animating {
    will-change: transform, opacity;
}

/* ============================================
 * レスポンシブ対応
 * ============================================ */
@media (max-width: 768px) {
    .hand {
        padding: var(--spacing-1);
    }

    .hand-value {
        margin-top: var(--spacing-1);
        padding: 2px 6px;
        font-size: 10px;
    }
}

@media (max-width: 375px) {
    .hand {
        gap: calc(var(--card-width) * -0.5);
    }

    .hand.large {
        gap: calc(var(--card-width-lg) * -0.4);
    }

    .hand-value {
        margin-top: 2px;
        font-size: 9px;
    }
}

/* ============================================
 * アクセシビリティ - アニメーション低減
 * ============================================ */
@media (prefers-reduced-motion: reduce) {
    .card,
    .card.dealing,
    .card.flipping,
    .card.hitting,
    .card.drawing {
        animation: none !important;
        transition: none !important;
    }

    .hand.bust::after,
    .hand.blackjack .card,
    .hand.win .card {
        animation: none !important;
    }

    .hand.bust .card {
        animation: none !important;
    }

    .hand.lose .card {
        transition: none !important;
    }

    .hand .card:hover {
        transform: none !important;
    }

    .hand-value.blackjack {
        animation: none !important;
    }
}