*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body{touch-action:manipulation;-webkit-user-select:none;user-select:none;background:linear-gradient(135deg,#fff9e6 0%,#ffe0f0 100%);height:100%;font-family:Hiragino Kaku Gothic ProN,Noto Sans JP,Yu Gothic,sans-serif;overflow:hidden}.screen{flex-direction:column;justify-content:center;align-items:center;width:100%;height:100dvh;display:none;position:fixed;inset:0}.screen.active{display:flex}.start-content{text-align:center;flex-direction:column;align-items:center;gap:24px;padding:32px;display:flex}.game-title{color:#ff6b6b;text-shadow:3px 3px #00000014;font-size:clamp(36px,8vw,64px);font-weight:900;line-height:1.2}.game-desc{color:#555;font-size:clamp(20px,4vw,28px);line-height:1.6}.btn-primary{color:#fff;cursor:pointer;touch-action:manipulation;background:linear-gradient(135deg,#ff6b6b,#ff922b);border:none;border-radius:20px;padding:clamp(16px,3vw,24px) clamp(48px,10vw,80px);font-family:inherit;font-size:clamp(24px,5vw,40px);font-weight:900;transition:transform .1s,box-shadow .1s;box-shadow:0 6px #c0392b}.btn-primary:active{transform:translateY(4px);box-shadow:0 2px #c0392b}.btn-small{color:#888;cursor:pointer;touch-action:manipulation;background:#fff;border:2px solid #ddd;border-radius:10px;padding:8px 18px;font-family:inherit;font-size:clamp(14px,2.5vw,18px);font-weight:700}.btn-small:active{background:#f0f0f0}#screen-game{justify-content:flex-start;overflow:hidden}.game-header{flex-shrink:0;justify-content:space-between;align-items:center;width:100%;max-width:680px;padding:10px 16px;display:flex}.counter{color:#555;font-size:clamp(15px,3vw,22px);font-weight:700}.counter strong{color:#ff6b6b;font-size:1.2em}.card-grid{grid-template-rows:repeat(3,1fr);grid-template-columns:repeat(4,1fr);gap:clamp(6px,1.5vmin,14px);width:min(680px,100vw);height:calc(100dvh - 64px);min-height:0;padding:clamp(6px,1.5vmin,14px);display:grid}.card-wrapper{cursor:pointer;perspective:800px;touch-action:manipulation;min-width:0;min-height:0}.card-inner{width:100%;height:100%;transform-style:preserve-3d;border-radius:16px;transition:transform .35s cubic-bezier(.4,0,.2,1);position:relative}.card-inner.flipped{transform:rotateY(180deg)}.card-inner.matched .card-front{background:linear-gradient(135deg,#d4f0c0,#a8e063);box-shadow:0 0 0 3px #6bcb77}.card-inner.matched{animation:.4s matched-bounce}@keyframes matched-bounce{0%{transform:rotateY(180deg)scale(1)}40%{transform:rotateY(180deg)scale(1.12)}to{transform:rotateY(180deg)scale(1)}}.card-face{backface-visibility:hidden;border-radius:16px;flex-direction:column;justify-content:center;align-items:center;gap:6px;display:flex;position:absolute;inset:0}.card-front{background:#fff;transform:rotateY(180deg);box-shadow:0 4px 12px #0000001f}.card-emoji{font-size:clamp(32px,7vw,56px);line-height:1}.card-kana{color:#333;font-size:clamp(14px,2.5vw,20px);font-weight:900}.card-back{background:linear-gradient(135deg,#667eea,#764ba2);box-shadow:0 4px 12px #0003}.card-back-icon{opacity:.9;font-size:clamp(28px,6vw,48px)}.clear-content{text-align:center;z-index:1;flex-direction:column;align-items:center;gap:20px;padding:32px;display:flex;position:relative}.clear-emoji{font-size:clamp(64px,15vw,120px);animation:.6s cubic-bezier(.175,.885,.32,1.275) bounce-in}@keyframes bounce-in{0%{opacity:0;transform:scale(0)}60%{transform:scale(1.2)}to{opacity:1;transform:scale(1)}}.clear-title{color:#ff6b6b;text-shadow:3px 3px #00000014;font-size:clamp(40px,10vw,72px);font-weight:900}.clear-score{color:#666;font-size:clamp(20px,4vw,30px);font-weight:700}.confetti-container{pointer-events:none;z-index:0;position:fixed;inset:0;overflow:hidden}.confetti-piece{animation:linear forwards confetti-fall;position:absolute;top:-20px}@keyframes confetti-fall{0%{opacity:1;transform:translateY(0)rotate(0)}to{opacity:0;transform:translateY(110vh)rotate(720deg)}}@media (orientation:portrait) and (width<=768px){.card-grid{max-width:100%}}@media (orientation:landscape) and (height<=600px){.game-header{padding:6px 16px}.card-grid{gap:6px;padding:6px}}