:root{--color-teal:#298a8a;--color-teal-hover:#1f6b6b;--color-teal-subtle:#eef7f7;--color-navy:#021320;--color-navy-surface:#0a1f33;--color-ink:#222;--color-text-secondary:#555;--color-text-muted:#777;--color-border:#ccc;--color-border-subtle:#e0e0e0;--color-panel-bg:#eee;--color-surface:#fff;--color-black:#000;--color-danger:#c0392b;--color-danger-bg:#fdf2f2;--color-success:#27ae60;--color-success-bg:#eafaf1;--color-warning:#d35400;--color-warning-bg:#fef5e7;--font-wordmark:"Varela Round", system-ui, sans-serif;--font-heading:"Neuton", serif;--font-body:"Merriweather Sans", system-ui, sans-serif;--font-difficulty:"Questrial", sans-serif;--radius-pill:100px;--radius-panel:8px;--radius-sm:4px}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;font-family:var(--font-body);color:var(--color-ink);-webkit-font-smoothing:antialiased;background-color:#f7f9fa;font-size:15px;line-height:1.5}#root{flex-direction:column;min-height:100%;display:flex}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);color:var(--color-black);letter-spacing:.04em;font-weight:700}h3,h4{text-transform:uppercase;letter-spacing:.08em}h4.difficulty{font-family:var(--font-difficulty);text-transform:none;letter-spacing:normal;color:var(--color-black);font-size:2.2rem}.pill-button{border-radius:var(--radius-pill);border:2px solid var(--color-border);background:var(--color-surface);color:var(--color-text-secondary);font-family:var(--font-body);cursor:pointer;white-space:nowrap;justify-content:center;align-items:center;gap:8px;padding:8px 22px;font-size:.95rem;font-weight:700;text-decoration:none;transition:all .2s ease-in-out;display:inline-flex}.pill-button:hover:not(:disabled){border-color:var(--color-teal);color:var(--color-teal);background:var(--color-teal-subtle)}.logo-button{cursor:pointer;background:0 0;border:none;border-radius:8px;align-items:center;margin:-4px;padding:4px;text-decoration:none;transition:opacity .15s ease-in-out,transform .15s ease-in-out;display:inline-flex}.logo-button:hover{opacity:.88;transform:translateY(-1px)}.logo-button:active{transform:translateY(0)}.logo-button:focus-visible{outline:2px solid var(--color-teal);outline-offset:4px}.pill-button.active,.pill-button.primary{background:var(--color-teal);border-color:var(--color-teal);color:#fff}.pill-button.primary:hover:not(:disabled){background:var(--color-teal-hover);border-color:var(--color-teal-hover);color:#fff}.pill-button.danger{border-color:var(--color-danger);color:var(--color-danger)}.pill-button.danger:hover:not(:disabled){background:var(--color-danger);color:#fff}.pill-button:disabled{opacity:.5;cursor:not-allowed}@keyframes rotating{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.rotating{animation:2s linear infinite rotating}.modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1000;background:#021320a6;place-items:center;padding:20px;display:grid;position:fixed;inset:0}.modal-dialog{background:var(--color-surface);border:1px solid var(--color-border-subtle);border-radius:12px;flex-direction:column;width:100%;max-width:600px;max-height:90vh;display:flex;position:relative;overflow-y:auto;box-shadow:0 16px 36px #00000040}.modal-header{border-bottom:1px solid var(--color-border-subtle);justify-content:space-between;align-items:center;padding:20px 24px;display:flex}.modal-header h2{font-size:1.4rem}.modal-body{flex-direction:column;gap:20px;padding:24px;display:flex}.modal-footer{border-top:1px solid var(--color-border-subtle);background:#fafafa;border-bottom-right-radius:12px;border-bottom-left-radius:12px;justify-content:flex-end;gap:12px;padding:16px 24px;display:flex}.close-button{color:var(--color-text-muted);cursor:pointer;background:0 0;border:none;padding:4px;font-size:1.5rem;line-height:1}.close-button:hover{color:var(--color-ink)}.accordion{flex-direction:column;gap:12px;display:flex}.accordion-item{border:1px solid var(--color-border);border-radius:var(--radius-panel);overflow:hidden}.accordion-header{text-align:left;background:var(--color-panel-bg);width:100%;font-family:var(--font-heading);color:var(--color-ink);cursor:pointer;border:none;justify-content:space-between;align-items:center;padding:14px 18px;font-size:1.15rem;font-weight:700;transition:background-color .15s;display:flex}.accordion-header:hover{background:#e4e4e4}.accordion-header.open{background:var(--color-teal);color:#fff}.accordion-content{background:var(--color-surface);border-top:1px solid var(--color-border);padding:18px}.form-group{flex-direction:column;gap:6px;display:flex}.form-label{color:var(--color-ink);font-size:.9rem;font-weight:700}.form-input,.form-select{border:2px solid var(--color-border);border-radius:var(--radius-panel);font-family:var(--font-body);background:var(--color-surface);color:var(--color-ink);padding:10px 14px;font-size:.95rem;transition:border-color .15s}.form-input:focus,.form-select:focus{border-color:var(--color-teal);outline:none}.board-area-inner{flex-direction:column;justify-content:center;align-items:center;margin:0 auto;padding:10px;display:flex}#boardCanvas{border:4px solid var(--color-black);background-color:var(--color-black);border-radius:4px;margin:0 auto;display:inline-block;overflow:hidden;box-shadow:0 8px 24px #0000002e}.sudoku-grid{background-color:var(--color-black);grid-template-rows:repeat(9,52px);grid-template-columns:repeat(9,52px);gap:0;display:grid}@media screen and (width<=540px){.sudoku-grid{grid-template-rows:repeat(9,36px);grid-template-columns:repeat(9,36px)}}.sudoku-cell{-webkit-user-select:none;user-select:none;font-family:var(--font-body);cursor:pointer;border:1px solid #00000038;border-top:none;border-left:none;outline:none;justify-content:center;align-items:center;padding:0;font-size:1.6rem;font-weight:700;transition:background-color .15s,transform .1s,box-shadow .15s;display:flex;position:relative}.sudoku-cell *{pointer-events:none;-webkit-user-select:none;user-select:none}@media screen and (width<=540px){.sudoku-cell{font-size:1.15rem}}.sudoku-cell[data-col="2"],.sudoku-cell[data-col="5"]{border-right:3px solid var(--color-black)}.sudoku-cell[data-col="8"]{border-right:none}.sudoku-cell[data-row="2"],.sudoku-cell[data-row="5"]{border-bottom:3px solid var(--color-black)}.sudoku-cell[data-row="8"]{border-bottom:none}.sudoku-cell:hover:not(.given):not(.disabled){filter:brightness(.93)}.sudoku-cell.selected{outline:none}.sudoku-cell.given{cursor:default;color:var(--color-black);font-weight:900}.sudoku-cell.player-move{color:#0b3c5d;font-weight:700}.sudoku-cell.drag-over{box-shadow:inset 0 0 0 3px var(--color-teal), 0 0 10px 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var(--color-black);width:48px;height:48px;font-family:var(--font-body);color:var(--color-ink);cursor:grab;-webkit-user-select:none;user-select:none;touch-action:none;background-color:#fff;border-radius:6px;justify-content:center;align-items:center;padding:0;font-size:1.5rem;font-weight:700;transition:transform .15s,box-shadow .15s,border-color .15s;display:flex;box-shadow:0 2px 5px #00000026}.number-bank-item *{pointer-events:none;-webkit-user-select:none;user-select:none}.number-bank-item:active{cursor:grabbing;transform:scale(.96)}.number-bank-item.is-dragging{cursor:grabbing;opacity:.35!important}.number-bank-item:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 4px 10px #00000038}.number-bank-item.selected{border-color:var(--color-teal);box-shadow:0 0 0 3px var(--color-teal), 0 4px 8px #0000002e;background-color:var(--color-teal-subtle);color:var(--color-teal);transform:translateY(-3px)}.number-bank-item.clear-item{color:#cf1322;background-color:#fff1f0}.number-bank-item.color-item{border-width:2.5px}.number-bank-item.color-item.selected{box-shadow:0 0 0 3px var(--color-teal), 0 4px 12px #0000004d;border-color:#fff}.sudoku-color-tile{border:1.5px solid #00000040;border-radius:5px;width:78%;height:78%;transition:transform .12s,box-shadow .12s;display:inline-block;box-shadow:0 1px 3px #0003}.sudoku-cell:hover:not(:disabled) .sudoku-color-tile{transform:scale(1.06)}.sudoku-cell.selected .sudoku-color-tile{transform:scale(1.08);box-shadow:0 2px 6px #00000059}@media screen and (width<=540px){.number-bank-item{width:36px;height:36px;font-size:1.15rem}}.print-only{display:none!important}@page{size:portrait;margin:10mm 12mm}@media print{*{-webkit-print-color-adjust:exact!important;print-color-adjust:exact!important}html,body{color:#000!important;background:#fff!important;width:100%!important;height:100%!important;margin:0!important;padding:0!important}body>div{flex-direction:column!important;justify-content:center!important;min-height:100%!important;display:flex!important}header,footer,main.web-only,.web-only,.welcome-banner,.site-header,.preflight-banner,.logo-button,.pill-button,.modal-overlay,#numbers,.number-bank-item,#introBoardMessage{display:none!important}body:has(.standalone-print-sheet) main{display:none!important}.print-only{display:block!important}.print-header{justify-content:space-between;align-items:baseline;width:100%;max-width:530px;margin:0 auto 8px;padding:0 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auto!important}.sudoku-grid{background-color:var(--color-black)!important;grid-template-rows:repeat(9,58px)!important;grid-template-columns:repeat(9,58px)!important}.sudoku-cell{color:#000!important;cursor:default!important;border-bottom:1px solid #00000047!important;border-right:1px solid #00000047!important;font-size:1.85rem!important;font-weight:800!important}.sudoku-cell[data-col="2"],.sudoku-cell[data-col="5"]{border-right:3px solid var(--color-black)!important}.sudoku-cell[data-row="2"],.sudoku-cell[data-row="5"]{border-bottom:3px solid var(--color-black)!important}.print-clues-only .player-move span,.sudoku-cell span[title=Given\ cell]{display:none!important}#printBottom,.print-footnote{text-align:center;width:100%;max-width:530px;font-family:"Varela Round", var(--font-body);color:#555;letter-spacing:.01em;margin:10px auto 0;font-size:.85rem;display:block!important}}.sudoku-cell.replay-active-cell{z-index:4;animation:.35s cubic-bezier(.18,.67,.6,1.22) 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strong{color:var(--color-ink)}.playback-scrubber-container{align-items:center;width:100%;display:flex}.playback-scrubber{background:var(--color-border);cursor:pointer;width:100%;height:6px;accent-color:var(--color-teal);border-radius:3px;outline:none;transition:opacity .2s}.playback-scrubber:hover{opacity:.9}.playback-status-row{background-color:var(--color-surface-hover);border-radius:8px;justify-content:space-between;align-items:center;gap:8px;padding:6px 12px;font-size:.85rem;display:flex}.playback-status-left{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.playback-player-badge{border-radius:var(--radius-pill);letter-spacing:.02em;align-items:center;gap:4px;padding:2px 9px;font-size:.76rem;font-weight:700;display:inline-flex}.playback-player-badge.you{color:#0891b2;background-color:#ecfeff;border:1px solid #a5f3fc}.playback-player-badge.partner{color:#7c3aed;background-color:#f5f3ff;border:1px solid #ddd6fe}.playback-co-stats{align-items:center;gap:6px;margin-left:4px;font-size:.74rem;display:inline-flex}.playback-co-stat{border-radius:var(--radius-pill);padding:2px 8px;font-weight:700}.playback-co-stat.you{color:#0891b2;background-color:#ecfeff;border:1px solid #cffafe}.playback-co-stat.partner{color:#7c3aed;background-color:#f5f3ff;border:1px solid #ede9fe}.playback-move-desc{color:var(--color-ink);font-weight:600}.playback-timing-tag{color:var(--color-teal);background:var(--color-surface);border:1px solid var(--color-border);border-radius:4px;padding:2px 6px;font-family:monospace;font-size:.78rem;font-weight:700}.sudoku-cell.replay-active-cell.replay-active-you{box-shadow:inset 0 0 0 3px #0891b2,0 0 16px #0891b2b3!important}.sudoku-cell.replay-active-cell.replay-active-partner{box-shadow:inset 0 0 0 3px #7c3aed,0 0 16px #7c3aedb3!important}.replay-cell-actor-tag{text-transform:uppercase;letter-spacing:.05em;pointer-events:none;z-index:10;border-radius:4px;padding:1px 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.15s}.speed-pill:hover{border-color:var(--color-teal);color:var(--color-ink)}.speed-pill.active{background-color:var(--color-teal);border-color:var(--color-teal);color:#fff}.faq-modal-dialog{background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:16px;width:92vw;max-width:680px;box-shadow:0 16px 48px #0000002e}.faq-search-bar{background-color:var(--color-surface);border-bottom:1px solid var(--color-border)}.faq-search-input{border:1px solid var(--color-border);background-color:var(--color-surface-hover);width:100%;color:var(--color-ink);border-radius:8px;outline:none;padding:10px 14px;font-family:inherit;font-size:.95rem;transition:border-color .2s,box-shadow .2s}.faq-search-input:focus{border-color:var(--color-teal);background-color:var(--color-surface);box-shadow:0 0 0 3px #298a8a26}.faq-category-pills{flex-wrap:wrap;gap:6px;margin-top:10px;display:flex}.faq-cat-pill{border-radius:var(--radius-pill);padding:5px 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10px}.faq-accordion-answer p:last-child{margin-bottom:0}.faq-accordion-answer strong{color:var(--color-ink)}.onboarding-modal-container{width:95%;max-width:600px;max-height:90vh;padding:28px;overflow-y:auto}.onboarding-header{text-align:center;flex-direction:column;align-items:center;margin-bottom:20px;display:flex}.onboarding-title{color:var(--color-ink);margin:12px 0 6px;font-size:1.5rem;font-weight:700}.onboarding-subtitle{color:var(--color-text-secondary);max-width:480px;margin:0;font-size:.95rem;line-height:1.5}.onboarding-profile-badge{background:var(--color-surface-subtle);border:1px solid var(--color-border);border-radius:var(--radius-md);align-items:center;gap:12px;margin-bottom:24px;padding:10px 16px;display:flex}.onboarding-avatar,.onboarding-avatar-placeholder{object-fit:cover;background:var(--color-border);border-radius:50%;justify-content:center;align-items:center;width:40px;height:40px;font-size:1.2rem;display:flex}.onboarding-profile-info{text-align:left;flex-direction:column;flex:1;display:flex}.onboarding-player-name{color:var(--color-ink);font-size:.95rem;font-weight:600}.onboarding-player-email{color:var(--color-text-secondary);font-size:.8rem}.onboarding-ready-tag{color:#15803d;white-space:nowrap;background:#dcfce7;border-radius:999px;padding:4px 10px;font-size:.75rem;font-weight:600}.onboarding-sections{flex-direction:column;gap:20px;margin-bottom:28px;display:flex}.onboarding-section-title{color:var(--color-ink);text-align:left;margin:0 0 10px;font-size:.95rem;font-weight:600}.onboarding-difficulty-grid{grid-template-columns:repeat(auto-fill,minmax(100px,1fr));gap:8px;display:grid}.onboarding-tier-card{border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-surface);cursor:pointer;text-align:left;flex-direction:column;align-items:flex-start;padding:10px 12px;font-family:inherit;transition:all .15s;display:flex}.onboarding-tier-card:hover{border-color:var(--color-teal);background:var(--color-surface-hover)}.onboarding-tier-card.active{border-color:var(--color-teal);box-shadow:0 0 0 1px var(--color-teal);background:#0d948814}.onboarding-tier-name{color:var(--color-ink);margin-bottom:2px;font-size:.88rem;font-weight:600}.onboarding-tier-desc{color:var(--color-text-secondary);font-size:.72rem;line-height:1.3}.onboarding-theme-grid{grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:10px;display:grid}.onboarding-theme-card{border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-surface);cursor:pointer;align-items:center;gap:10px;padding:8px 12px;font-family:inherit;transition:all .15s;display:flex}.onboarding-theme-card:hover{border-color:var(--color-teal)}.onboarding-theme-card.active{border-color:var(--color-teal);box-shadow:0 0 0 1px var(--color-teal);background:#0d948814}.onboarding-theme-swatches{gap:2px;display:flex}.onboarding-swatch{border:1px solid #00000026;border-radius:3px;width:14px;height:14px;display:inline-block}.onboarding-theme-name{color:var(--color-ink);font-size:.85rem;font-weight:500}.onboarding-actions{justify-content:flex-end;gap:12px;display:flex}.onboarding-start-btn{width:100%;padding:12px 20px;font-size:1rem;font-weight:600}