.difficulty-row{display:grid;grid-template-columns:repeat(6,minmax(70px,1fr));align-items:center;gap:7px;margin-bottom:12px}.segment,.difficulty,.number-pad button,.button{min-height:42px;border:1px solid var(--line);border-radius:8px;color:var(--accent-dark);background:#fff;font-weight:950;text-align:center;transition:transform 120ms ease,border-color 120ms ease,background 120ms ease,color 120ms ease}.segment,.difficulty{padding:10px 8px}.segment:hover,.difficulty:hover,.number-pad button:hover,.button:hover,.segment:focus-visible,.difficulty:focus-visible,.number-pad button:focus-visible,.button:focus-visible{border-color:rgba(200,68,45,0.56);outline:none;transform:translateY(-1px)}.segment.active,.difficulty.active{color:#fff;border-color:var(--accent);background:linear-gradient(180deg,#da573f 0%,#b93424 100%)}.button{display:inline-flex;align-items:center;justify-content:center;min-width:116px;padding:12px 18px;text-decoration:none}.button.primary{color:#fff;border-color:var(--accent);background:linear-gradient(180deg,#da573f 0%,#b93424 100%);box-shadow:0 10px 24px rgba(200,68,45,0.18)}.button.ghost{background:rgba(255,255,255,0.76)}.button.active,.button[aria-pressed="true"]{color:#fff;border-color:var(--accent);background:linear-gradient(180deg,#da573f 0%,#b93424 100%)}.button.full{width:100%;margin-top:12px}.board-wrap{position:relative;display:grid;place-items:center}@media (min-width:981px){.board-wrap{width:calc(100%+var(--board-card-padding)+var(--board-card-padding));margin-inline:calc(-1 * var(--board-card-padding))}}.solver-security-warning{display:grid;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:10px;margin:0 0 10px;padding:8px 10px;border:1px solid rgba(200,68,45,0.38);border-radius:8px;background:linear-gradient(135deg,rgba(200,68,45,0.14),rgba(232,185,63,0.12)),rgba(255,249,239,0.94);box-shadow:0 10px 24px rgba(85,48,21,0.08)}.solver-security-warning strong{display:inline-flex;align-items:center;min-height:24px;padding:4px 8px;border-radius:7px;color:#fff;background:linear-gradient(180deg,#da573f 0%,#b93424 100%);font-size:10px;font-weight:950;letter-spacing:0.12em;text-transform:uppercase;white-space:nowrap}.solver-security-warning span{min-width:0;color:#7a231a;font-size:12px;font-weight:850;line-height:1.25}.sudoku-board{position:relative;isolation:isolate;width:min(100%,var(--board-size));aspect-ratio:1;display:grid;grid-template-columns:repeat(9,1fr);grid-template-rows:repeat(9,minmax(0,1fr));border:2px solid rgba(50,21,7,0.74);border-radius:8px;overflow:hidden;background:#fffaf0;box-shadow:inset 0 0 0 2px rgba(232,185,63,0.16)}.sudoku-board.is-pending-start{filter:saturate(0.82) contrast(0.96)}.sudoku-board.is-paused{filter:saturate(0.7) contrast(0.9)}.board-start-overlay,.board-pause-overlay{position:absolute;top:50%;left:50%;z-index:30;display:grid;place-items:center;width:min(100%,var(--board-size));aspect-ratio:1;border-radius:8px;background:rgba(50,21,7,0.28);backdrop-filter:blur(5px);transform:translate(-50%,-50%)}.board-pause-overlay{background:rgba(35,18,8,0.34)}.board-start-overlay[hidden],.board-pause-overlay[hidden]{display:none}.board-start-card,.board-pause-card{display:grid;justify-items:center;gap:8px;width:min(276px,calc(100% - 48px));padding:20px 18px 18px;border:1px solid rgba(234,215,170,0.88);border-radius:8px;color:var(--ink);text-align:center;background:radial-gradient(circle at 50% 0%,rgba(200,68,45,0.18),transparent 58%),linear-gradient(180deg,rgba(255,255,255,0.96),rgba(255,247,229,0.94)),rgba(255,253,247,0.96);box-shadow:0 22px 60px rgba(50,21,7,0.25),inset 0 1px 0 rgba(255,255,255,0.94)}.board-pause-card{width:min(252px,calc(100% - 48px))}.board-start-card img,.board-pause-card img{width:58px;height:58px;object-fit:contain}.board-start-card strong,.board-pause-card strong{color:var(--ink);font-size:24px;font-weight:950;line-height:1}.board-start-card span,.board-pause-card span{color:var(--muted);font-size:13px;font-weight:760;line-height:1.28}.board-start-card .start-solve-rate{width:100%;padding:9px 10px;border:1px solid rgba(200,68,45,0.34);border-radius:8px;color:#7f2118;background:linear-gradient(135deg,rgba(200,68,45,0.18),rgba(232,185,63,0.18)),rgba(255,249,239,0.96);font-size:13.5px;font-weight:950;letter-spacing:0;line-height:1.18;box-shadow:inset 0 1px 0 rgba(255,255,255,0.82)}.board-start-card.has-solver-warning .start-solve-rate{border-color:rgba(157,39,28,0.58);color:#6d160f;background:linear-gradient(135deg,rgba(200,68,45,0.26),rgba(255,232,183,0.22)),rgba(255,247,235,0.98)}.board-start-card .start-subcopy{width:100%;padding:7px 10px;border:1px solid rgba(50,21,7,0.10);border-radius:8px;color:rgba(50,21,7,0.68);background:rgba(255,252,245,0.72);font-size:11.5px;font-weight:850;line-height:1.18}.locked-play-hero{margin-top:4px}