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.game-layout{display:grid;grid-template-columns:1fr;grid-template-rows:auto 1fr auto;gap:.5rem;align-items:center;justify-items:center}}@media(min-width:1024px)and (min-height:600px){.app.app--game{max-width:min(100%,800px)}.app.app--game .game-top-bar .game-header-icon{width:1.4rem;height:1.4rem}.app.app--game .game-top-bar .home-btn-header,.app.app--game .game-top-bar .settings-btn,.app.app--game .game-top-bar .mute-btn,.app.app--game .game-top-bar .fullscreen-btn{min-width:44px;min-height:44px}}.othello-board{display:grid;grid-template-columns:1fr;gap:1px;background:linear-gradient(135deg,#50231233,#6e371e1f),url(/wood-dark.jpg);background-size:1024px 1024px;padding:6px;border:2px solid rgba(90,45,25,.4);border-radius:2px;box-shadow:inset 0 2px 4px #ffffff38,inset -2px 0 3px #ffffff1f,inset 0 -2px 4px #00000024,inset 2px 0 3px #0000001a,-1px 1px #5a2814f2,-2px 2px #552612eb,-3px 3px #4e2210e0,-4px 4px #481e0fd9,-5px 5px #411c0dd1,-6px 6px #3c190cc7,-8px 10px 8px #28140a38,-6px 14px 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button:focus-visible{outline-color:#a08068}html.dark-mode .game-over-overlay .game-over-btn-primary:focus-visible{outline-color:#f8f6f2}.game-header{width:100%;display:flex;justify-content:center}.game-header-inner{display:flex;align-items:center;justify-content:center;gap:.25rem;flex-wrap:wrap}.fullscreen-btn{display:flex;align-items:center;justify-content:center;min-height:44px;min-width:44px;padding:.5rem;border:none;border-radius:50%;background:transparent;color:#5a5248;font-size:1.25rem;font-weight:600;-webkit-tap-highlight-color:transparent}.fullscreen-btn:hover{color:#4a4238;background:#5a504814}.home-btn-header,.save-btn-header{display:flex;align-items:center;justify-content:center;min-height:44px;min-width:44px;padding:.5rem;border:none;border-radius:50%;background:transparent;color:#5a5248;font-size:1.25rem;font-weight:600;-webkit-tap-highlight-color:transparent}.home-btn-header:hover,.save-btn-header:hover{color:#4a4238;background:#5a504814}.settings-btn{display:flex;align-items:center;justify-content:center;min-height:44px;min-width:44px;padding:.5rem;border:none;border-radius:50%;background:transparent;color:#5a5248;font-size:1.25rem;font-weight:600;-webkit-tap-highlight-color:transparent}.settings-btn:hover{color:#4a4238;background:#5a504814}.mute-btn{display:flex;align-items:center;justify-content:center;min-height:44px;min-width:44px;padding:.5rem;border:none;border-radius:50%;background:transparent;color:#5a5248;font-size:1.25rem;font-weight:600;-webkit-tap-highlight-color:transparent}.mute-btn:hover{color:#4a4238;background:#5a504814}.app.app--settings{overflow-y:auto;overflow-x:hidden;max-height:var(--app-height, 100dvh);scrollbar-width:none}.app.app--settings::-webkit-scrollbar{display:none}html.dark-mode .home-btn-header,html.dark-mode .save-btn-header{color:#c8c4bc}html.dark-mode .home-btn-header:hover,html.dark-mode .save-btn-header:hover{color:#d8d4cc;background:#b8b4ac1f}html.dark-mode .settings-btn{color:#c8c4bc}html.dark-mode .settings-btn:hover{color:#d8d4cc;background:#b8b4ac1f}html.dark-mode .mute-btn{color:#c8c4bc}html.dark-mode .mute-btn:hover{color:#d8d4cc;background:#b8b4ac1f}html.dark-mode .fullscreen-btn{color:#c8c4bc}html.dark-mode .fullscreen-btn:hover{color:#d8d4cc;background:#b8b4ac1f}.confirm-overlay{position:fixed;inset:0;padding:max(1rem,env(safe-area-inset-top,0)) max(1rem,env(safe-area-inset-right,0)) max(1rem,env(safe-area-inset-bottom,0)) max(1rem,env(safe-area-inset-left,0));box-sizing:border-box;background:#e8e4dc8c;backdrop-filter:blur(2px);-webkit-backdrop-filter:blur(2px);display:flex;align-items:center;justify-content:center;z-index:100}.confirm-card{display:flex;flex-direction:column;align-items:center;gap:.75rem;padding:2rem 2.5rem;border-radius:16px;background:#faf8f4f5;box-shadow:0 8px 40px #3c322d2e;max-width:320px;width:100%}.confirm-title{margin:0;font-size:1.35rem;font-weight:600;color:#5a5048}.confirm-desc{margin:0;font-size:.95rem;color:#7a7268;text-align:center;line-height:1.4}.confirm-buttons{display:flex;flex-direction:column;gap:.6rem;width:100%;margin-top:.5rem}.confirm-btn{padding:.875rem 1.5rem;font-size:1rem;font-weight:600;border-radius:10px;cursor:pointer;-webkit-tap-highlight-color:transparent;transition:background .2s,border-color .2s,color .2s;width:100%;min-height:48px}.confirm-btn-cancel{background:linear-gradient(160deg,#a08068,#8a6a58,#6a5242);border:1px solid 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max(.5rem,env(safe-area-inset-left,0))}}.app{display:flex;flex-direction:column;align-items:center;gap:1.5rem;width:100%;max-width:min(600px,calc(100% - 2rem));margin:0 auto;overflow:hidden}.app.app--game{margin:0 auto;overflow:visible;max-height:var(--app-height, 100dvh);flex:1;min-height:0;max-width:min(600px,calc(100% - 2rem));--root-pad-v: 2rem;--cell-size: clamp(28px, min( calc((min(100vw, 600px) - 4rem - 23px)/8) , calc((var(--app-height, 100dvh) - var(--root-pad-v) - 6rem - 23px) / 8) ), 72px)}@media(min-width:600px){.app.app--game{--root-pad-v: 4rem;--cell-size: clamp(28px, min( calc((min(100vw - 6rem, 600px) - 23px)/8) , calc((var(--app-height, 100dvh) - var(--root-pad-v) - 6rem - 23px) / 8) ), 72px)}}@media(max-width:430px)and (orientation:portrait){.app,.app.app--game{max-width:min(600px,calc(100% - 1rem))}}@media(min-width:1024px){.app{max-width:560px}}@media(orientation:landscape)and (min-width:768px){.app.app--home{max-width:min(900px,calc(100% - 2rem))}}.app h1,.app-title{margin:0 0 .5rem;font-family:Zen Kaku Gothic New,Noto Sans JP,sans-serif;font-weight:500;font-size:clamp(2.5rem,6vw,4.5rem);color:#8a8078;letter-spacing:.1em}.app-title{display:flex;flex-direction:column;align-items:center;gap:.2rem;flex-shrink:0}.app-title-kanji{font-family:Shippori Mincho,serif;font-size:1em;font-weight:600;line-height:1.1;opacity:.92}.app-title-romaji{font-size:.45em;font-weight:400;color:#a09688;letter-spacing:.25em;text-transform:uppercase}.othello-placeholder-screen{padding:1.5rem;text-align:center;color:#8a8078;font-family:Zen Kaku Gothic New,sans-serif}.placeholder-jp{font-family:Shippori Mincho,serif;font-size:1.5rem;margin-bottom:.25rem}.placeholder-en{font-size:.9rem;opacity:.7}.placeholder-heading{font-size:1.2rem;margin:1rem 0;color:#8a8078}.placeholder-back-btn{padding:.4rem .8rem;background:transparent;border:1px solid rgba(138,128,120,.3);border-radius:6px;color:#8a8078;cursor:pointer;font-family:Zen Kaku Gothic New,sans-serif;margin-bottom:1rem}.placeholder-back-btn:hover{background:#8a807814}.settings-row{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.5rem 0;color:#8a8078}.settings-row select{padding:.3rem .5rem;border:1px solid rgba(138,128,120,.3);border-radius:4px;background:transparent;color:#8a8078;font-family:Zen Kaku Gothic New,sans-serif}html.dark-mode .app h1,html.dark-mode .app-title{color:#e8e4dc}html.dark-mode .app-title-romaji{color:#9a9188}html.dark-mode .othello-placeholder-screen{color:#c8c0b8}html.dark-mode .placeholder-back-btn{color:#c8c0b8;border-color:#c8c0b84d}html.dark-mode .settings-row{color:#c8c0b8}html.dark-mode .settings-row select{color:#c8c0b8;border-color:#c8c0b84d}:root:fullscreen,:root:-webkit-full-screen,:root:-moz-full-screen,:root:-ms-fullscreen{width:100%;height:100%;overflow:hidden;display:flex;align-items:center;justify-content:center}@media(orientation:landscape){.app.app--game{--root-pad-v: 2rem;--cell-size: clamp(20px, min( calc((100vw - 4rem - 23px)/8) , calc((var(--app-height, 100dvh) - var(--root-pad-v) - 6rem - 23px) / 8) ), 72px)}}@media(max-width:380px){.app.app--game{--cell-size: clamp(24px, min( calc((min(100vw, 600px) - 3rem - 23px)/8) , calc((var(--app-height, 100dvh) - var(--root-pad-v) - 6rem - 23px) / 8) ), 36px)}}.legal-page{width:100%;max-width:min(600px,calc(100% - 2rem));margin:0 auto;padding:2rem 1rem;font-family:Zen Kaku Gothic New,Noto Sans JP,sans-serif}.legal-page .back-icon-btn{margin-bottom:.5rem}.legal-page-title{margin:0 0 1.25rem;font-size:1.5rem;font-weight:600;color:#4a4540}.legal-page-content{margin-bottom:1.5rem}.legal-page h2{margin:1.25rem 0 .5rem;font-size:1.1rem;font-weight:600;color:#4a4540}.legal-page h2:first-of-type{margin-top:0}.legal-page p{margin:0 0 .75rem;line-height:1.6;color:#5a554e}.legal-page ul{margin:0 0 .75rem;padding-left:1.5rem;line-height:1.6;color:#5a554e}.legal-page a{color:#6b5b4f;text-decoration:underline}.legal-page a:hover{color:#4a4540}.legal-page-updated,.legal-page-copyright{margin-top:1.5rem;font-size:.85rem;color:#8a8278}.legal-footer{margin-top:2rem;padding-top:1rem;border-top:1px solid rgba(106,91,79,.25);font-size:.9rem}.legal-footer a{color:#6b5b4f;text-decoration:none}.legal-footer a:hover{text-decoration:underline;color:#4a4540}.legal-footer-sep{margin:0 .4rem;color:#8a8278}html.dark-mode .legal-page .back-icon-btn{color:#c8c4bc}html.dark-mode .legal-page .back-icon-btn:hover,html.dark-mode .legal-page-title,html.dark-mode .legal-page h2{color:#e8e4dc}html.dark-mode .legal-page p,html.dark-mode .legal-page ul{color:#b8b4ac}html.dark-mode .legal-page a{color:#a8a098}html.dark-mode .legal-page a:hover{color:#d8d4cc}html.dark-mode .legal-page-updated,html.dark-mode .legal-page-copyright{color:#8a8278}html.dark-mode .legal-footer{border-top-color:#b8b4ac33}html.dark-mode .legal-footer a{color:#9a9188}html.dark-mode .legal-footer a:hover{color:#c8c4bc}html.dark-mode .legal-footer-sep{color:#7a7268}