:root {font-family:"Hiragino Maru Gothic ProN","BIZ UDPGothic","Yu Gothic",system-ui,sans-serif;color:#29343a;background:#fff8ec}
*{box-sizing:border-box} html{scroll-behavior:smooth;overflow-x:hidden} body{margin:0;min-height:100vh;overflow-x:hidden;position:relative} a{color:inherit} .skip{position:absolute;top:-100px;left:8px;z-index:10;background:#fff;padding:12px} .skip:focus{top:8px} :focus-visible{outline:4px solid #367cf2;outline-offset:4px}
.decor{position:absolute;z-index:-1;pointer-events:none;border-radius:50%;filter:blur(2px)}.decor-a{width:48vw;height:48vw;left:-26vw;top:12vw;background:#ffebc7}.decor-b{width:28vw;height:28vw;right:0;top:650px;background:#e0f6e9}
.site-header{width:min(1120px,calc(100% - 40px));margin:auto;display:flex;align-items:center;justify-content:space-between;padding:20px 0}.logo{display:flex;align-items:center;gap:10px;font-weight:900;text-decoration:none;font-size:23px;letter-spacing:.03em}.logo span{display:inline-block}.site-label{font-size:13px;color:#677074;font-weight:800;background:#fff;padding:10px 15px;border-radius:30px;border:1px solid #f0e8d9}
main{width:min(1120px,calc(100% - 40px));margin:auto}.hero{display:grid;grid-template-columns:1.04fr .96fr;gap:20px;min-height:430px;align-items:center;padding:40px 0 50px}.eyebrow{font-size:13px;letter-spacing:.11em;font-weight:900;color:#df723a;margin:0 0 17px}.hero h1{font-size:clamp(34px,5.6vw,64px);line-height:1.24;letter-spacing:.025em;margin:0;font-weight:950}.hero h1 span{color:#299d75}.sub{font-size:clamp(15px,1.6vw,19px);font-weight:700;color:#59696b;line-height:2;margin:24px 0}.explore{display:inline-flex;align-items:center;gap:20px;min-height:56px;border-radius:999px;padding:13px 28px;background:#2f9975;color:white;text-decoration:none;font-size:17px;font-weight:900;box-shadow:0 6px 0 #167653;transition:transform .2s}.explore:hover{transform:translateY(-3px)}.explore:active{transform:translateY(3px);box-shadow:0 3px 0 #167653}
.hero-art{position:relative;width:min(460px,90%);aspect-ratio:1;margin:auto;border-radius:47% 53% 60% 40%;background:#d9f4e7;box-shadow:0 0 0 18px #eafaed,0 20px 50px #89bb9e40}.hero-piece{position:absolute;display:grid;place-items:center;border-radius:28px;box-shadow:0 12px 30px #2c5f4d18;font-weight:900}.piece-one{left:6%;top:14%;background:#ffdfb7;color:#b97b31;width:28%;height:25%;font-size:66px;transform:rotate(-14deg)}.piece-two{right:9%;top:11%;background:#c8dffe;color:#426fc5;width:36%;height:27%;font-size:36px;transform:rotate(12deg)}.piece-two span{font-size:25px;color:#ff9b63}.piece-three{left:8%;bottom:9%;background:#fdfdfb;width:35%;height:27%;font-size:38px;transform:rotate(8deg)}.piece-three span{margin-left:-15px;color:#aaa}.piece-four{right:6%;bottom:13%;background:#ffdfeb;color:#cc80a8;width:30%;height:24%;font-size:65px;transform:rotate(-11deg)}.hero-face{position:absolute;left:39%;top:42%;width:22%;height:22%;background:#ffd78c;border-radius:50%;display:grid;place-items:center;color:#7f523d;font-size:47px}.hero-face span{transform:translateY(-8px)}.orbit{position:absolute;font-size:30px;color:#edb45a}.orbit-1{top:-8%;left:50%}.orbit-2{right:-8%;top:49%;color:#9ed9c9}
.games{padding:40px 0 80px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:15px;margin-bottom:28px}.section-heading .eyebrow{margin-bottom:8px}.section-heading h2{font-size:clamp(25px,3vw,36px);margin:0;font-weight:950}.game-count{font-size:14px;font-weight:900;color:#74817b;white-space:nowrap}.game-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:25px}.game-card{display:grid;grid-template-columns:170px 1fr;align-items:center;gap:20px;min-height:245px;padding:25px;border:2px solid #f1eade;border-radius:30px;background:#fff;text-decoration:none;box-shadow:0 13px 26px #6754380e;transition:transform .2s,box-shadow .2s,border-color .2s}.game-card:hover{transform:translateY(-5px);box-shadow:0 22px 35px #67543819;border-color:#dbefe0}.game-card:active{transform:translateY(0)}.card-icon{height:172px;width:100%;border-radius:24px;position:relative;overflow:hidden;display:flex;justify-content:center;align-items:center}.card-math .card-icon{background:#e3f5d7;color:#428a3a}.math-art{gap:5px;font-size:49px}.math-art span{font-size:28px;color:#dd9351}.card-reversi .card-icon{background:#d7eadd;display:grid;grid-template-columns:repeat(2,50px);grid-template-rows:repeat(2,50px);place-content:center;gap:8px}.reversi-art i{display:block;width:100%;height:100%;border-radius:50%;background:linear-gradient(130deg,#2b3936,#040909);box-shadow:1px 6px 7px #1b3c314a}.reversi-art i:nth-child(2),.reversi-art i:nth-child(3){background:linear-gradient(135deg,#fff,#d5dfdc)}.card-jiyucho .card-icon{background:#fde6e0}.draw-art .scribble{font-size:140px;color:#fb897f;position:absolute;left:9%;top:6%;transform:rotate(-24deg)}.draw-art .pencil{font-size:69px;position:absolute;right:15%;bottom:3%}.draw-art .star{position:absolute;right:25%;top:8%;font-size:31px;color:#eab135}.card-kobito .card-icon{background:linear-gradient(#397d86,#145c66);color:#ffebbd}.kobito-art .cloud{font-size:93px;position:absolute;right:9%;top:8%;opacity:.66}.kobito-art .person{font-size:56px;position:absolute;left:23%;top:34%}.kobito-art .person small{display:block;font-size:60px;line-height:.5}.kobito-art .grass{position:absolute;bottom:3%;left:10%;font-size:38px;color:#9edaa3}
.card-copy h3{font-size:clamp(20px,2.4vw,26px);margin:9px 0 10px;font-weight:950}.card-copy p{font-size:14px;line-height:1.8;color:#6b7473;font-weight:700;margin:0 0 20px}.category{font-size:12px;color:#64806d;font-weight:900}.play-link{display:flex;align-items:center;justify-content:space-between;width:fit-content;gap:20px;min-height:46px;color:#267b62;font-size:15px;font-weight:950}.play-link span{background:#e4f7ea;display:grid;place-items:center;width:35px;height:35px;border-radius:50%;font-size:19px}.card-reversi .play-link{color:#326777}.card-jiyucho .play-link{color:#b45e5f}.card-kobito .play-link{color:#1b6570}
footer{background:#f3efdf;border-top:1px solid #e8e0d0;text-align:center;padding:33px 10px 42px;color:#68736d;font-size:13px;font-weight:800}footer p{margin:5px}
@media(max-width:900px){.game-card{grid-template-columns:1fr;gap:14px}.card-icon{height:155px}.hero{min-height:380px}.hero-art{width:88%}}
@media(max-width:610px){.site-header{padding:17px 0}.site-label{font-size:12px}.hero{grid-template-columns:1fr;gap:24px;padding:27px 0 45px}.hero-art{width:min(270px,75%);grid-row:1;aspect-ratio:1}.hero-text{text-align:center}.hero h1{font-size:clamp(32px,8vw,47px)}.hero .sub{margin:16px 0 24px}.games{padding-top:18px}.game-grid{gap:17px;grid-template-columns:1fr}.game-card{grid-template-columns:116px 1fr;min-height:176px;gap:16px;padding:16px;border-radius:24px}.card-icon{height:130px;border-radius:19px}.math-art{font-size:36px}.card-reversi .card-icon{grid-template-columns:repeat(2,37px);grid-template-rows:repeat(2,37px);gap:6px}.draw-art .scribble{font-size:106px}.draw-art .pencil{font-size:55px}.card-copy h3{font-size:19px;margin:5px 0}.card-copy p{font-size:12px;margin:0 0 4px}.category{font-size:11px}.play-link{font-size:13px;min-height:34px}.play-link span{height:27px;width:27px;font-size:16px}.game-count{font-size:12px}}
@media(max-width:370px){.game-card{grid-template-columns:1fr}.card-icon{height:125px}.card-copy p{font-size:13px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}