body.board-fullscreen-active{overflow:hidden}.play-hero.is-board-fullscreen,.game-layout.is-board-fullscreen{--board-size:min(78vh,calc(100vw - 440px),820px);position:fixed;inset:0;z-index:96;width:100%;max-width:none;margin:0;padding:clamp(16px,3vw,38px);display:grid;grid-template-columns:minmax(0,var(--board-size)) minmax(280px,340px);align-items:center;justify-content:center;gap:clamp(14px,3vw,30px);background:radial-gradient(circle at 20% 0%,rgba(232,185,63,0.18),transparent 34%),linear-gradient(180deg,rgba(255,248,232,0.94),rgba(255,241,211,0.96)),url("./assets/zudoku_site_bg_washi_v1.webp") center center / cover no-repeat,#fff1d3}.is-board-fullscreen .board-stage{padding:0;overflow:visible;border:0;background:transparent;box-shadow:none}.is-board-fullscreen .board-stage>:not(.board-wrap){display:none !important}.is-board-fullscreen .board-wrap{width:var(--board-size);margin-inline:0}.is-board-fullscreen .sudoku-board{width:var(--board-size);box-shadow:0 30px 90px rgba(50,21,7,0.22),inset 0 0 0 2px rgba(232,185,63,0.16)}.is-board-fullscreen .control-panel{position:static;display:grid;align-content:center;gap:8px;width:min(30vw,340px);padding:0;border:0;background:transparent;box-shadow:none}.is-board-fullscreen .game-settings,.is-board-fullscreen #newGameButton,.is-board-fullscreen .sync-note,.is-board-fullscreen .stat-grid{display:none !important}.is-board-fullscreen .score-strip{gap:6px}.is-board-fullscreen .score-strip>div{min-height:58px;padding:8px 5px;background:rgba(255,248,229,0.82);box-shadow:0 10px 24px rgba(85,48,21,0.08)}.is-board-fullscreen .score-strip strong{font-size:clamp(16px,1.5vw,20px)}.is-board-fullscreen .control-title{margin:2px 0 0}.is-board-fullscreen .number-pad{width:100%;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(7px,1vw,11px)}.is-board-fullscreen .number-pad button{min-height:clamp(54px,8vmin,76px);border-color:rgba(169,139,97,0.42);background:radial-gradient(circle at 50% 0%,rgba(255,255,255,0.82),transparent 42%),linear-gradient(180deg,#fffdf7 0%,#f8e9bb 100%);font-size:clamp(26px,5vmin,42px)}.is-board-fullscreen .number-pad .num-left{right:8px;bottom:6px;font-size:clamp(9px,1.3vmin,12px)}.is-board-fullscreen .game-actions{margin-top:0;gap:7px}.is-board-fullscreen .icon-button{min-height:clamp(42px,5.5vmin,52px)}.is-board-fullscreen .icon-button img{width:min(26px,100%);height:min(26px,100%)}.board-fullscreen-exit{position:absolute;top:clamp(12px,2vw,22px);right:clamp(12px,2vw,22px);z-index:2;display:grid;place-items:center;width:42px;height:42px;border:1px solid rgba(169,139,97,0.48);border-radius:999px;color:var(--accent-dark);background:rgba(255,253,247,0.92);box-shadow:0 12px 30px rgba(50,21,7,0.16);font-size:18px;font-weight:950}.board-fullscreen-exit:hover,.board-fullscreen-exit:focus-visible{border-color:rgba(200,68,45,0.7);outline:none;color:#fff;background:linear-gradient(180deg,#da573f 0%,#b93424 100%)}.icon-button{min-width:0;min-height:46px;padding:6px;overflow:hidden;border-color:rgba(121,82,52,0.22);color:var(--accent-dark);background:linear-gradient(180deg,rgba(255,255,255,0.94),rgba(255,244,215,0.76)),rgba(255,253,247,0.78);box-shadow:inset 0 1px 0 rgba(255,255,255,0.94),inset 0 -1px 0 rgba(121,82,52,0.10),0 7px 16px rgba(85,48,21,0.07)}.icon-button img{width:min(30px,100%);height:min(30px,100%);object-fit:contain;pointer-events:none;user-select:none}.tool-count{position:absolute;right:8px;bottom:5px;min-width:14px;min-height:14px;display:grid;place-items:center;border-radius:999px;color:#b93424;background:rgba(255,248,232,0.92);font-size:10px;font-weight:950;line-height:1;box-shadow:0 0 0 1px rgba(185,52,36,0.20);pointer-events:none}.icon-button:hover,.icon-button:focus-visible{border-color:rgba(200,68,45,0.42);background:linear-gradient(180deg,rgba(255,255,255,0.98),rgba(255,238,197,0.86)),rgba(255,253,247,0.92)}.icon-button.active{border-color:rgba(200,68,45,0.62);background:radial-gradient(circle at 50% 0%,rgba(232,185,63,0.28),transparent 58%),linear-gradient(180deg,rgba(255,248,229,0.96),rgba(255,229,185,0.88))}.icon-button:disabled{opacity:0.44;filter:grayscale(0.55);box-shadow:none}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.loading-screen{position:absolute;top:50%;left:50%;z-index:45;display:grid;place-items:center;width:min(100%,var(--board-size));aspect-ratio:1;border-radius:8px;background:rgba(50,21,7,0.30);backdrop-filter:blur(5px);transform:translate(-50%,-50%)}.loading-screen[hidden]{display:none}.loading-card{display:grid;justify-items:center;gap:8px;width:min(230px,calc(100% - 46px));padding:18px 18px;border:1px solid rgba(234,215,170,0.86);border-radius:8px;color:var(--ink);text-align:center;background:radial-gradient(circle at 50% 0%,rgba(232,185,63,0.24),transparent 58%),rgba(255,253,247,0.96);box-shadow:0 22px 70px rgba(85,48,21,0.18)}.loading-card img{width:58px;height:58px;object-fit:contain;animation:loadingPulse 900ms ease-in-out infinite alternate}@keyframes loadingPulse{from{transform:scale(0.96);opacity:0.78}to{transform:scale(1.04);opacity:1}}.sync-note{margin:10px 0 0;color:var(--muted);font-size:13px;font-weight:750;line-height:1.35}.stat-grid{grid-template-columns:repeat(3,minmax(0,1fr));margin-top:12px}.stat-tile{min-height:68px;padding:10px 8px}.stat-tile span{display:block;color:var(--muted);font-size:11px;font-weight:850;line-height:1.1}.stat-tile strong{display:block;margin-top:6px;overflow:hidden;color:var(--ink);font-size:18px;line-height:1;text-overflow:ellipsis;white-space:nowrap}.status-box{margin-top:12px;padding:13px;color:var(--muted);font-size:14px;font-weight:750;line-height:1.45}