:root{font-family:"DM Sans",-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:#303b34;background:#f7f8f4;font-synthesis:none;--bg:#f7f8f4;--surface:#fff;--ink:#303b34;--muted:#949b92;--soft:#f6f7f3;--line:#e9ece5;--green:#315d4a;--green-ink:#3d7158;--green-soft:#eaf0e7;--cell-line:#e3e7df;--box-line:#99a893;--selected:#315d4a;--related:#f1f4ee;--same:#dce8d8;--error:#c16657;--error-bg:#fae9e4;--shadow:0 4px 24px #33472a03;color-scheme:light}
*{box-sizing:border-box}body{margin:0}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;color:inherit;cursor:pointer}button{border:0}button:disabled{cursor:default}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible{outline:3px solid #b4c794;outline-offset:4px}button{touch-action:manipulation}svg{display:block}.icon{width:22px;height:22px;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;fill:none;flex-shrink:0}.icon-defs{position:absolute;width:0;height:0;overflow:hidden}.site-header{border-bottom:1px solid var(--line);background:var(--surface)}.header-inner{max-width:1176px;height:100px;margin:auto;padding:0 28px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:12px;font-size:23px;font-weight:650;letter-spacing:2px}.brand-dot{color:var(--green);padding:0 4px}.brand small{display:block;font-size:8px;letter-spacing:2.7px;font-weight:500;color:var(--muted);margin-top:5px}.brand-mark{display:grid;grid-template-columns:repeat(3,7px);grid-template-rows:repeat(3,7px);gap:3px;background:var(--green);padding:9px;border-radius:10px;transform:rotate(-5deg)}.brand-mark i{background:#f3f6ed;border-radius:1.3px}.brand-mark i:nth-child(even){opacity:.4}.main-nav{display:flex;gap:37px;height:100%;align-items:stretch;margin-left:30px}.nav-link{background:none;position:relative;padding:0 2px;font-size:13px;letter-spacing:.4px;color:#858d82;white-space:nowrap}.nav-link:hover{color:var(--green)}.nav-link.active{color:var(--green);font-weight:600}.nav-link.active:after{content:"";position:absolute;height:3px;width:22px;border-radius:3px 3px 0 0;background:var(--green);bottom:0;left:calc(50% - 11px)}.nav-dot{display:inline-block;width:5px;height:5px;background:#b3bc89;border-radius:50%;vertical-align:top;margin:3px 0 0 5px}.header-actions{display:flex;gap:10px}.icon-button{width:35px;height:35px;display:grid;place-items:center;border-radius:50%;background:transparent;color:#7f897d}.icon-button:hover{background:var(--green-soft);color:var(--green)}.header-actions .icon{width:19px;height:19px}.page-shell{max-width:1080px;padding:0 28px;margin:auto}.page-intro{display:flex;align-items:center;justify-content:space-between;padding:44px 0 31px}.eyebrow{font-size:9px;letter-spacing:2.1px;font-weight:550;color:#8b9582;margin:0 0 13px;display:flex;align-items:center;gap:7px}.eyebrow>span{width:5px;height:5px;background:#9da988;border-radius:50%}h1{font-family:"Noto Serif SC","Songti SC",STSong,serif;font-size:29px;letter-spacing:2px;font-weight:500;line-height:1.6;margin:0;color:var(--ink)}h1>span{color:#78926a}.intro-description{font-size:12px;letter-spacing:.7px;color:#8b9386;margin:9px 0 0}.today{text-align:right;display:flex;flex-direction:column;gap:12px;font-size:11px;color:#899180;padding-top:16px;letter-spacing:.6px}.today-note{display:flex;align-items:center;justify-content:flex-end;gap:6px;color:#7a876b}.today-note .icon{width:15px;height:15px}.game-layout{display:grid;grid-template-columns:minmax(0,1.62fr) minmax(300px,1fr);align-items:start;gap:24px}.panel{background:var(--surface);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow)}.board-panel{padding:25px 28px 21px;min-width:0}.board-heading{display:flex;align-items:center;justify-content:space-between;gap:8px}.board-title{display:flex;align-items:center;gap:11px}.board-title h2{font-size:17px;letter-spacing:1px;font-weight:600;margin:0}.difficulty-badge{font-size:10px;padding:4px 9px;border-radius:5px;background:var(--green-soft);color:#69815f;line-height:1.4}.saved-status{font-size:10px;color:#a2a89a;display:flex;align-items:center;gap:5px}.saved-status>span{width:4px;height:4px;background:#acb79a;border-radius:50%}.game-status{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:21px 0 18px}.status-group{display:flex;align-items:center;gap:8px;font-size:12px}.status-label{font-size:10px;color:var(--muted)}.timer{font-variant-numeric:tabular-nums;letter-spacing:1px;font-size:14px;color:#596850;font-weight:500}.pause-button{width:24px;height:24px;background:var(--soft);border-radius:50%;display:grid;place-items:center;color:#8c9784;margin-left:1px}.pause-button .icon{width:12px;height:12px;stroke-width:2.2}.status-divider{height:10px;width:1px;background:var(--line);margin:0 3px}.mistakes{font-size:13px;font-weight:500}.mistakes.has-errors{color:var(--error)}.completion{font-size:12px;font-variant-numeric:tabular-nums}.completion b{font-weight:500}.completion>span{color:#b1b6ab;font-size:10px}.board-wrap{position:relative;isolation:isolate}.sudoku-board{display:grid;grid-template-columns:repeat(9,minmax(0,1fr));border:1.5px solid var(--box-line);border-radius:7px;overflow:hidden;aspect-ratio:1;background:var(--surface);width:100%}.cell{position:relative;display:grid;place-items:center;aspect-ratio:1;min-width:0;padding:0;line-height:1;background:var(--surface);border-right:1px solid var(--cell-line);border-bottom:1px solid var(--cell-line);font-family:"DM Sans",sans-serif;font-size:clamp(20px,2.1vw,29px);font-weight:450;color:var(--green-ink);transition:background .12s,color .12s}.cell:nth-child(3n){border-right:1.5px solid var(--box-line)}.cell:nth-child(9n){border-right:0}.cell:nth-child(n+19):nth-child(-n+27),.cell:nth-child(n+46):nth-child(-n+54){border-bottom:1.5px solid var(--box-line)}.cell:nth-child(n+73){border-bottom:0}.cell.given{color:#3d483a;font-weight:500}.cell.related{background:var(--related)}.cell.same-value{background:var(--same);color:var(--green)}.cell.incorrect{background:var(--error-bg);color:var(--error)}.cell.selected{background:var(--selected);color:#fff;z-index:1}.cell.selected.incorrect{background:var(--error);color:white}.cell:not(.selected):hover{background:var(--green-soft)}.cell:focus-visible{outline:2px solid #b0bf8e;outline-offset:-3px;z-index:2}.cell .pencil-marks{width:100%;height:100%;padding:3px;display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr);gap:0}.pencil-marks span{display:grid;place-items:center;font-size:10px;font-weight:500;line-height:1;color:#87977a}.cell.selected .pencil-marks span{color:#e4eddb}.board-bottom{display:flex;justify-content:space-between;gap:6px;font-size:9px;color:#a3aa9c;align-items:center;padding-top:17px}.board-bottom>span:first-child{display:flex;align-items:center;gap:5px}.legend-dot{height:5px;width:5px;background:#628264;border-radius:50%}.keyboard-tip{display:flex;align-items:center;gap:4px;font-size:9px;letter-spacing:.1px}kbd{font:inherit;font-size:8px;border:1px solid var(--line);border-radius:3px;padding:1px 3px;margin-left:4px}.mobile-tip{display:none}.progress-track{height:3px;background:var(--soft);border-radius:3px;overflow:hidden;margin-top:16px}.progress-track>span{display:block;height:100%;width:0;background:#a8bc90;border-radius:3px;transition:width .3s}.sidebar{display:flex;flex-direction:column;gap:16px}.difficulty-panel{padding:23px 22px 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i{width:3px;border-radius:1px;background:var(--line)}.difficulty-bars i.active{background:#98aa7d}.primary-button{display:flex;align-items:center;justify-content:center;gap:9px;width:100%;min-height:45px;padding:12px 16px;background:var(--green);border:1px solid transparent;border-radius:8px;color:#fff;font-size:12px;font-weight:500;letter-spacing:.7px;transition:background .2s,transform .15s}.primary-button:hover{background:#244b3a;transform:translateY(-1px)}.primary-button:active{transform:translateY(0)}.primary-button .icon{width:17px;height:17px}.new-game-button .button-arrow{margin-left:auto;width:17px}.new-game-button{justify-content:flex-start}.new-game-button>.icon:first-child{width:16px;height:16px}.input-panel{padding:22px}.number-pad{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:18px}.number-key{background:var(--soft);border:1px solid transparent;border-radius:8px;min-height:62px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;transition:background .15s,border-color .15s;color:var(--green);position:relative}.number-key strong{font-size:25px;font-weight:450;line-height:1.1;font-variant-numeric:tabular-nums}.number-key .remaining{font-size:8px;color:#b1b9a7;line-height:1.2;letter-spacing:.4px}.number-key:hover{background:var(--green-soft);border-color:#d6e0cb}.number-key.active{background:var(--green-soft);border-color:#c3d0b7}.number-key.exhausted{opacity:.28}.game-tools{display:grid;grid-template-columns:repeat(4,1fr);margin-top:20px;gap:5px}.tool-button{background:transparent;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:9px;min-height:53px;padding:4px;border-radius:7px;color:#7f8c72;font-size:10px}.tool-button:hover,.tool-button[aria-pressed=true]{background:var(--green-soft);color:var(--green)}.tool-button:disabled{opacity:.32}.tool-button>.icon,.tool-icon-wrap>.icon{width:22px;height:22px;stroke-width:1.5}.tool-icon-wrap{position:relative}.note-indicator,.hint-count{position:absolute;font-size:7px;right:-10px;top:-5px;color:#879776;background:var(--soft);padding:2px 3px;border:1px solid var(--surface);border-radius:3px;line-height:1}.note-indicator.on{background:var(--green);color:white}.hint-count{min-width:13px;text-align:center;background:#eaf0df;color:#839366}.input-note{margin-top:17px;padding-top:16px;border-top:1px solid var(--line);font-size:9px;color:#a2aa96;display:flex;gap:6px;align-items:center;line-height:1.6}.input-note .icon{width:13px;height:13px;color:#aab68e}.daily-card{width:100%;background:#ecf0e4;border:1px solid #e2e9d6;padding:18px 17px;display:flex;align-items:center;text-align:left;gap:12px;border-radius:13px;color:#687a50;transition:background .2s}.daily-card:hover{background:#e3ead9}.daily-icon{height:37px;width:37px;border-radius:10px;background:#e3ead7;display:grid;place-items:center;flex-shrink:0}.daily-icon .icon{width:21px;height:21px;color:#82956b}.daily-copy{display:flex;flex-direction:column;gap:7px;flex:1;min-width:0}.daily-copy strong{font-size:11px;font-weight:550;line-height:1.6}.daily-new{font-size:6px;margin-left:6px;letter-spacing:.4px;color:#94a477;vertical-align:middle;border:1px solid #b9c5a2;border-radius:3px;padding:1px 3px}.daily-copy>span{font-size:9px;color:#9ba78a;white-space:nowrap}.daily-arrow{width:16px;height:16px;color:#8d9d76}.quiet-note{display:flex;align-items:center;justify-content:center;gap:12px;margin:32px 0 29px;color:#a0a991}.quiet-note p{font-family:"Noto Serif SC","Songti SC",serif;font-size:11px;letter-spacing:1px;margin:0}.quiet-note .icon{width:14px;height:14px}.quiet-line{width:32px;height:1px;background:#dde2d5}.site-footer{display:flex;align-items:center;justify-content:space-between;font-size:9px;letter-spacing:.6px;color:#a7ae9d;border-top:1px solid var(--line);padding:21px 0 25px}.site-footer>button{background:transparent;display:flex;align-items:center;gap:4px;font-size:9px;color:#94a084}.site-footer .icon{width:12px;height:12px}.footer-credit{font-size:7px;letter-spacing:1.5px}.pause-overlay{position:absolute;inset:0;z-index:4;background:color-mix(in srgb,var(--surface) 92%,transparent);backdrop-filter:blur(9px);display:flex;flex-direction:column;justify-content:center;align-items:center;border:1px solid var(--line);border-radius:7px;text-align:center;padding:20px}.pause-overlay[hidden]{display:none}.pause-illustration{display:grid;place-items:center;width:65px;height:65px;background:var(--green-soft);border-radius:50%;color:var(--green);margin-bottom:14px}.pause-illustration .icon{width:29px;height:29px}.pause-overlay h3{font-family:"Noto Serif SC","Songti SC",serif;font-size:18px;font-weight:500}.pause-overlay p{font-size:12px;color:var(--muted);margin:0 0 25px}.pause-overlay .primary-button{max-width:170px}.modal{border:1px solid var(--line);border-radius:19px;background:var(--surface);color:var(--ink);padding:34px;width:min(460px,calc(100% - 32px));max-height:calc(100dvh - 40px);overflow:auto;box-shadow:0 24px 100px #172b2330}.modal::backdrop{background:#1c30294d;backdrop-filter:blur(5px)}.modal-close{position:absolute;right:13px;top:13px}.modal-close .icon{width:17px;height:17px}.modal-eyebrow{font-size:9px;color:#97a485;letter-spacing:2px;margin:0 0 12px}.modal h2{font-family:"Noto Serif SC","Songti SC",serif;font-size:24px;font-weight:500;letter-spacing:1px;margin:0 0 12px}.modal-description{font-size:12px;line-height:1.9;color:var(--muted);margin:0 0 23px}.modal-actions{display:flex;gap:10px;margin-top:25px}.secondary-button{width:100%;min-height:45px;padding:10px 14px;border:1px solid var(--line);border-radius:8px;background:var(--soft);font-size:12px;color:var(--ink)}.secondary-button:hover{background:var(--green-soft)}.rules-list{display:flex;flex-direction:column;gap:16px;margin:24px 0}.rule{display:flex;gap:13px;align-items:flex-start;font-size:12px;line-height:1.8;color:#89937e}.rule b{display:grid;place-items:center;width:27px;height:27px;background:var(--green-soft);color:var(--green);border-radius:8px;font-size:12px;font-weight:500;flex-shrink:0}.rule strong{color:var(--ink);font-weight:500}.shortcut-list{border-top:1px solid var(--line);padding-top:17px;font-size:10px;color:var(--muted);line-height:2.2}.setting-row{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:18px 0;border-bottom:1px solid var(--line)}.setting-row:last-child{border-bottom:0}.setting-row strong{display:block;font-size:13px;font-weight:500}.setting-row small{display:block;font-size:10px;color:var(--muted);margin-top:6px;line-height:1.6}.switch{appearance:none;width:37px;height:22px;border:0;border-radius:20px;background:#d7ddcf;position:relative;cursor:pointer;flex-shrink:0}.switch:after{content:"";position:absolute;width:16px;height:16px;left:3px;top:3px;border-radius:50%;background:white;transition:transform .15s}.switch:checked{background:var(--green)}.switch:checked:after{transform:translateX(15px)}.stats-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:24px 0}.stat-item{padding:18px 4px;background:var(--soft);border-radius:9px;text-align:center}.stat-item strong{display:block;font-size:25px;font-weight:500;color:var(--green)}.stat-item span{display:block;font-size:10px;color:var(--muted);margin-top:7px}.stats-table{width:100%;border-collapse:collapse;font-size:12px;text-align:left}.stats-table th{font-size:10px;color:var(--muted);font-weight:400;padding:10px 0}.stats-table td{padding:13px 0;border-top:1px solid var(--line);font-variant-numeric:tabular-nums}.stats-table th:last-child,.stats-table td:last-child{text-align:right}.hint-preview{display:flex;align-items:center;gap:17px;background:var(--soft);border:1px solid var(--line);padding:18px;border-radius:10px;margin-top:18px}.hint-digit{font-size:35px;font-weight:500;width:53px;height:59px;background:var(--green-soft);color:var(--green);display:grid;place-items:center;border-radius:8px}.hint-preview p{font-size:12px;line-height:1.8;margin:0}.hint-preview small{font-size:10px;color:var(--muted)}.win-icon{display:grid;place-items:center;margin:4px auto 20px;width:75px;height:75px;background:var(--green-soft);border-radius:50%;color:var(--green)}.win-icon .icon{width:35px;height:35px}.win-content{text-align:center}.win-content .modal-description{margin-bottom:12px}.win-stats{display:flex;justify-content:center;gap:28px;padding:15px 0}.win-stats strong{display:block;font-size:22px;font-weight:500;color:var(--green);font-variant-numeric:tabular-nums}.win-stats span{font-size:10px;color:var(--muted);display:block;margin-top:5px}.toast{position:fixed;z-index:10;left:50%;bottom:35px;transform:translate(-50%,12px);opacity:0;pointer-events:none;background:#344b3e;color:#fff;border:1px solid #ffffff15;box-shadow:0 5px 20px #26362720;border-radius:10px;padding:13px 20px;font-size:12px;max-width:calc(100% - 32px);width:max-content;transition:opacity .2s,transform .2s;line-height:1.6;text-align:center}.toast.visible{opacity:1;transform:translate(-50%,0)}.confetti{position:fixed;left:50%;top:45%;width:7px;height:11px;z-index:12;pointer-events:none;animation:confetti 1.8s ease-out forwards}@keyframes confetti{from{transform:translate(0,0) rotate(0);opacity:1}to{transform:translate(var(--x),var(--y)) rotate(var(--rot));opacity:0}}[hidden]{display:none!important}

[data-theme=dark]{--bg:#1e2621;--surface:#27312a;--ink:#e0e5da;--muted:#8e9a88;--soft:#2e392f;--line:#394338;--green:#86a98a;--green-ink:#acd0ab;--green-soft:#354a38;--cell-line:#3b493b;--box-line:#75846a;--selected:#688d69;--related:#303e31;--same:#445b40;--error:#e8a18e;--error-bg:#503932;--shadow:none;color-scheme:dark;background:var(--bg);color:var(--ink)}[data-theme=dark] .cell.given{color:#d5decd}[data-theme=dark] .cell.selected{color:#fff}[data-theme=dark] .primary-button{background:#66896d;color:#fff}[data-theme=dark] .daily-card{background:#35422d;border-color:#46543a}[data-theme=dark] .daily-icon{background:#414f36}[data-theme=dark] .daily-copy strong{color:#bccba9}[data-theme=dark] .timer{color:#c0cdb4}[data-theme=dark] .brand-mark{background:#597b5e}[data-theme=dark] .difficulty-badge{color:#a1b790}

@media(min-width:1450px){.header-inner{height:106px}.page-intro{padding-top:50px}.page-shell{max-width:1110px}.game-layout{gap:28px}.number-key{min-height:65px}.board-panel{padding:27px 30px 23px}.quiet-note{margin-top:36px}}
@media(max-width:900px) and (min-width:701px){.page-shell{padding:0 22px}.header-inner{padding:0 23px;height:85px}.game-layout{grid-template-columns:minmax(0,1.25fr) minmax(285px,1fr);gap:16px}.board-panel{padding:22px 18px 18px}.difficulty-panel,.input-panel{padding:20px 17px}.main-nav{gap:22px;margin-left:0}.header-actions{gap:2px}.brand{font-size:20px}.saved-status{font-size:8px}.keyboard-tip{display:none}.mobile-tip{display:inline}.number-key{min-height:52px}.input-note{font-size:8px}.daily-card{padding:15px 11px;gap:8px}.daily-copy strong{font-size:10px}.daily-new{display:none}.page-intro{padding-top:32px}h1{font-size:26px}.today{font-size:9px}.cell{font-size:25px}.board-bottom{font-size:8px}.section-label{font-size:11px}.tiny-label{font-size:7px}.game-status{gap:5px}.status-group{gap:5px}}
@media(max-width:700px){.header-inner{height:76px;padding:0 20px;flex-wrap:wrap;position:relative}.brand{font-size:20px;gap:10px;letter-spacing:1.4px}.brand-mark{grid-template-columns:repeat(3,5px);grid-template-rows:repeat(3,5px);gap:2.5px;padding:8px;border-radius:9px}.brand small{font-size:6px;letter-spacing:2.3px;margin-top:4px}.header-actions{gap:3px}.header-actions .icon{width:18px;height:18px}.icon-button{width:30px;height:32px}.main-nav{order:3;width:100%;height:43px;margin:0;justify-content:center;gap:45px;position:absolute;top:76px;left:0;background:var(--surface);border-bottom:1px solid var(--line)}.nav-link{font-size:11px}.nav-link.active:after{height:2px}.site-header{margin-bottom:43px}.page-shell{padding:0 18px;max-width:520px}.page-intro{padding:27px 1px 23px}.eyebrow{font-size:7px;letter-spacing:1.5px;margin-bottom:9px}h1{font-size:23px;letter-spacing:1.2px}.intro-description{font-size:10px;letter-spacing:.3px;margin-top:7px}.today{display:none}.game-layout{grid-template-columns:minmax(0,1fr);gap:14px}.sidebar{display:contents}.difficulty-panel{grid-row:1;padding:16px 17px 13px;display:grid;grid-template-columns:1fr auto;column-gap:12px;border-radius:12px}.difficulty-panel .section-label{display:none}.difficulty-tabs{margin-top:0;padding:3px;gap:1px;align-self:center}.difficulty-tab{font-size:11px;padding:9px 0;letter-spacing:0}.difficulty-description{grid-row:2;margin:10px 0 0;grid-column:1/-1;gap:7px;min-height:12px}.difficulty-description p{font-size:9px}.new-game-button{font-size:10px;gap:4px;min-height:36px;padding:9px 10px;margin:0;letter-spacing:0;border-radius:6px;white-space:nowrap}.new-game-button>.icon:first-child{width:13px;height:13px}.new-game-button .button-arrow{display:none}.board-panel{grid-row:2;padding:19px 17px 16px;border-radius:12px}.board-title h2{font-size:15px}.difficulty-badge{font-size:9px;padding:3px 7px}.saved-status{font-size:9px}.game-status{padding:15px 0 14px}.status-group{gap:7px}.status-label{font-size:9px}.timer{font-size:13px}.sudoku-board{border-radius:5px}.cell{font-size:25px}.pencil-marks span{font-size:8px}.cell .pencil-marks{padding:2px}.board-bottom{padding-top:13px;font-size:8px}.keyboard-tip{display:none}.mobile-tip{display:inline;font-size:8px}.progress-track{margin-top:13px}.input-panel{grid-row:3;padding:12px 13px 13px;display:flex;flex-direction:column;border-radius:12px}.keypad-label{display:none}.number-pad{order:2;grid-template-columns:repeat(9,minmax(0,1fr));gap:5px;margin-top:13px}.number-key{min-height:49px;border-radius:6px;gap:3px}.number-key strong{font-size:23px}.number-key .remaining{font-size:6px;letter-spacing:0}.game-tools{order:1;margin-top:0;padding:0 3px 10px;border-bottom:1px solid var(--line);gap:14px}.tool-button{font-size:9px;gap:5px;min-height:47px}.tool-button>.icon,.tool-icon-wrap>.icon{width:20px;height:20px}.input-note{order:3;border:0;justify-content:center;margin-top:12px;padding-top:0;font-size:8px}.input-note .icon{width:12px;height:12px}.daily-card{grid-row:4;padding:15px 18px;border-radius:12px;gap:12px}.daily-copy strong{font-size:11px}.daily-copy>span{font-size:9px}.daily-new{display:inline}.daily-icon{height:35px;width:35px}.quiet-note{margin:26px 0 23px;gap:9px}.quiet-note p{font-size:10px;letter-spacing:.5px}.quiet-line{width:18px}.quiet-note .icon{width:13px;height:13px}.site-footer{padding-top:17px;font-size:8px;padding-bottom:25px}.footer-credit{display:none}.site-footer>button{font-size:8px}.toast{bottom:24px;font-size:11px}.modal{padding:32px 24px}.pause-overlay h3{font-size:16px}.pause-overlay p{font-size:11px}.board-heading{gap:4px}.board-title{gap:8px}}
@media(max-width:700px){.header-inner{height:60px}.main-nav{top:60px;height:36px}.site-header{margin-bottom:36px}.page-intro{padding:16px 1px 15px}.eyebrow,.intro-description{display:none}h1{font-size:21px}.game-layout{gap:10px}.difficulty-panel{padding:12px 14px 10px}.difficulty-description{margin-top:8px}.board-panel{padding:14px 17px 13px}.game-status{padding:9px 0 11px}.board-bottom{display:none}.progress-track{margin-top:12px;height:2px}.input-panel{padding:9px 13px 11px}.game-tools{padding-bottom:8px}.number-pad{margin-top:10px}.input-note{display:none}.tool-button{min-height:43px}}
@media(max-width:370px){.page-shell{padding:0 12px}.header-inner{padding:0 15px}.board-panel{padding:14px 13px 13px}.difficulty-panel{padding-left:12px;padding-right:12px;column-gap:8px}.difficulty-tab{font-size:10px}.new-game-button{font-size:9px;padding-left:8px;padding-right:8px}.cell{font-size:22px}.number-pad{gap:3px}.number-key strong{font-size:21px}.today{display:none}.header-actions{gap:1px}h1{font-size:21px}.saved-status{font-size:8px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

.reward-hint-button{width:100%;margin-top:12px;order:3;font-size:11px}.reward-hint-button:disabled{opacity:.6}.local-achievements{list-style:none;padding:0;margin:0}.local-achievements li{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 0;border-top:1px solid var(--line);font-size:12px}.local-achievements strong{font-weight:500}.local-achievements small{display:block;margin-top:5px;font-size:10px;color:var(--muted)}.achievement-state{color:var(--green);white-space:nowrap;font-size:11px}

@media (orientation:portrait) and (max-width:700px) and (max-height:740px){
  .site-header{padding-top:env(safe-area-inset-top);margin-bottom:30px}
  .header-inner{height:44px}
  .brand{font-size:17px}
  .brand small{display:none}
  .main-nav{top:44px;height:30px}
  .page-shell{padding:8px 12px max(8px,env(safe-area-inset-bottom))}
  .page-intro,.quiet-note,.site-footer,.daily-card,.difficulty-description,.progress-track{display:none}
  .game-layout{gap:8px}
  .difficulty-panel{padding:6px 8px;column-gap:6px}
  .difficulty-tab{padding:6px 0;font-size:10px}
  .new-game-button{min-height:30px;padding:6px 8px;font-size:9px}
  .board-panel{padding:6px 10px}
  .board-title h2{font-size:13px}
  .game-status{padding:3px 0 5px}
  .board-wrap{width:min(100%,max(180px,calc(100dvh - 326px - env(safe-area-inset-top) - env(safe-area-inset-bottom))));margin-inline:auto}
  .cell{font-size:20px}
  .cell .pencil-marks{padding:1px}
  .pencil-marks span{font-size:6px}
  .input-panel{padding:6px 10px}
  .game-tools{padding-bottom:4px;gap:6px}
  .tool-button{min-height:40px;gap:3px}
  .tool-button>.icon,.tool-icon-wrap>.icon{width:18px;height:18px}
  .number-pad{margin-top:6px}
  .number-key{min-height:40px}
  .number-key strong{font-size:22px}
  .number-key .remaining{display:none}
}

/* Short landscape screens need a board and controls beside one another. */
@media (orientation:landscape) and (max-height:500px){
  .site-header{padding-top:env(safe-area-inset-top);margin-bottom:0}
  .header-inner{height:36px;padding:0 max(12px,env(safe-area-inset-right)) 0 max(12px,env(safe-area-inset-left));flex-wrap:nowrap}
  .brand{font-size:16px;gap:8px;letter-spacing:1px}
  .brand small{display:none}
  .brand-mark{grid-template-columns:repeat(3,4px);grid-template-rows:repeat(3,4px);gap:2px;padding:6px;border-radius:6px}
  .main-nav{position:static;order:0;width:auto;height:100%;margin:0;gap:14px;border:0}
  .nav-link{font-size:10px}
  .header-actions{gap:2px}
  .icon-button{width:28px;height:30px}
  .header-actions .icon{width:17px;height:17px}
  .page-shell{max-width:none;padding:6px max(10px,env(safe-area-inset-right)) max(6px,env(safe-area-inset-bottom)) max(10px,env(safe-area-inset-left))}
  .page-intro,.quiet-note,.site-footer,.daily-card,.difficulty-description,.section-label,.input-note,.board-bottom,.progress-track,.saved-status{display:none}
  .game-layout{--board-size:min(46vw,calc(100dvh - 114px - env(safe-area-inset-top) - env(safe-area-inset-bottom)));grid-template-columns:auto minmax(0,1fr);gap:12px;max-width:760px;margin-inline:auto}
  .board-panel{grid-row:auto;width:calc(var(--board-size) + 18px);padding:6px 8px}
  .board-title{gap:7px}
  .board-title h2{font-size:13px}
  .difficulty-badge{font-size:9px;padding:2px 6px}
  .game-status{padding:4px 0;gap:5px}
  .status-group{gap:5px}
  .status-label,.completion>span{font-size:9px}
  .timer,.mistakes,.completion{font-size:11px}
  .pause-button{width:22px;height:22px}
  .board-wrap{width:100%;margin:0}
  .cell{font-size:clamp(18px,5.8dvh,23px)}
  .cell .pencil-marks{padding:1px}
  .pencil-marks span{font-size:clamp(6px,1.8dvh,8px)}
  .sidebar{display:flex;min-width:0;gap:8px;max-height:calc(100dvh - 48px - env(safe-area-inset-top) - env(safe-area-inset-bottom));overflow-y:auto}
  .difficulty-panel{display:flex;flex-direction:column;gap:6px;padding:8px}
  .difficulty-tabs{margin:0;padding:3px;align-self:stretch}
  .difficulty-tab{font-size:10px;padding:6px 0}
  .new-game-button{min-height:30px;padding:6px 8px;font-size:10px;gap:6px}
  .new-game-button .button-arrow{display:none}
  .new-game-button>.icon:first-child{width:13px;height:13px}
  .input-panel{display:flex;flex-direction:column;padding:8px}
  .number-pad{order:0;grid-template-columns:repeat(3,minmax(0,1fr));margin:0;gap:4px}
  .number-key{min-height:32px;gap:0}
  .number-key strong{font-size:21px}
  .number-key .remaining{display:none}
  .game-tools{order:1;margin-top:6px;padding:0;gap:4px;border:0}
  .tool-button{min-height:36px;font-size:9px;gap:2px}
  .tool-button>.icon,.tool-icon-wrap>.icon{width:18px;height:18px}
  .reward-hint-button{order:2;min-height:30px;margin-top:6px;padding:6px 8px;font-size:10px}
}

@media (orientation:portrait) and (max-width:700px) and (max-height:740px), (orientation:landscape) and (max-height:500px){
  .pause-overlay{padding:12px}
  .pause-illustration{display:none}
  .pause-overlay h3{font-size:14px;margin:0 0 8px}
  .pause-overlay p{font-size:10px;margin:0 0 12px}
  .pause-overlay .primary-button{min-height:36px;padding:8px}
  .modal{max-height:calc(100dvh - 16px);padding:28px 20px}
}

/* Native Banner has a separate reserved area in menu, pause and result scenes. */
.platform-banner-visible body{padding-bottom:var(--platform-ad-space,0px)}


.practice-guide{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:15px 17px;margin-bottom:18px;background:#eef3e6;border:1px solid #dae4cd;border-radius:9px}.practice-guide[hidden]{display:none}.practice-guide>div{flex:1}.practice-guide strong{font-size:12px;color:#678355;font-weight:500}.practice-guide strong span{font:10px ui-monospace,monospace;color:#99aa87;margin-left:12px}.practice-guide p{font-size:11px;line-height:1.8;color:#899a78;margin:8px 0 0}.practice-guide button{background:none;color:#7d9367;font-size:10px;min-height:44px;white-space:nowrap}
@media(max-width:700px){.practice-guide{padding:12px;margin-bottom:13px;gap:7px;align-items:flex-start}.practice-guide p{font-size:10px}.practice-guide button{font-size:9px;padding:0 4px}.practice-guide strong{font-size:11px}}

@media(max-width:700px){.practice-mode .page-intro{display:none}.practice-mode main{padding-top:16px}.practice-mode .board-panel{padding:14px}.practice-mode .practice-guide{padding:10px 12px;margin-bottom:11px}.practice-mode .game-layout{gap:12px}.practice-mode .difficulty-panel,.practice-mode .daily-card{display:none}.practice-mode .input-panel{padding:12px 14px}.practice-mode .keypad-label,.practice-mode .input-note{display:none}.practice-mode .game-tools{margin-top:10px}.practice-mode .board-key{display:none}}
@media(max-width:700px){.practice-mode #number-pad{grid-template-columns:repeat(5,minmax(0,1fr));gap:7px}.practice-mode .number-key{min-height:44px}.practice-mode .game-tools{display:none}.practice-mode .practice-guide{display:grid;grid-template-columns:1fr auto;gap:3px 8px}.practice-mode .practice-guide>div{display:contents}.practice-mode .practice-guide p{grid-column:1/-1;grid-row:2;margin:0}.practice-mode .practice-guide>button{grid-column:2;grid-row:1}.practice-mode .practice-guide strong{grid-row:1;font-size:10px}.practice-mode .practice-guide strong span{margin-left:6px}}
@media(orientation:portrait) and (max-width:700px) and (max-height:740px){.practice-mode .board-wrap{width:min(100%,max(180px,calc(100dvh - 440px - env(safe-area-inset-top) - env(safe-area-inset-bottom))))}.practice-mode .board-panel{padding:9px 12px}.practice-mode .practice-guide{margin-bottom:7px;padding:6px 9px}.practice-mode main{padding-top:7px}.practice-mode .game-layout{gap:8px}.practice-mode .input-panel{padding:8px 12px}}
@media(orientation:landscape) and (max-height:500px){.number-key{min-height:44px}.practice-mode .game-layout{position:relative}.practice-mode .practice-guide{position:absolute;left:calc(var(--board-size) + 30px);right:0;top:0;display:grid;grid-template-columns:1fr auto;gap:3px 8px;padding:7px 10px;margin:0}.practice-mode .practice-guide>div{display:contents}.practice-mode .practice-guide strong{font-size:10px;grid-row:1}.practice-mode .practice-guide strong span{margin-left:5px}.practice-mode .practice-guide p{grid-column:1/-1;grid-row:2;font-size:10px;line-height:1.7;margin:0}.practice-mode .practice-guide>button{grid-column:2;grid-row:1;font-size:9px;padding:0;min-height:44px}.practice-mode .difficulty-panel,.practice-mode .daily-card,.practice-mode .game-tools{display:none}.practice-mode .input-panel{padding:116px 8px 8px}.practice-mode .keypad-label{display:none}}
@media(min-width:701px) and (min-height:501px){.practice-mode .page-intro,.practice-mode .difficulty-panel,.practice-mode .daily-card{display:none}.practice-mode .page-shell{padding-top:24px}.practice-mode .practice-guide{display:grid;grid-template-columns:1fr auto;gap:3px 12px;padding:8px 12px;margin-bottom:12px}.practice-mode .practice-guide>div{display:contents}.practice-mode .practice-guide strong{grid-row:1}.practice-mode .practice-guide>button{grid-column:2;grid-row:1}.practice-mode .practice-guide p{grid-column:1/-1;grid-row:2;margin:0}.practice-mode .board-wrap{max-width:min(100%,calc(100dvh - 340px));margin-inline:auto}}

/* A hint teaches one supported deduction without writing an answer into the game. */
.hint-tutor-modal{width:min(940px,calc(100vw - 28px));max-width:none;max-height:calc(100dvh - 28px);padding:28px;overflow:auto}
.hint-tutor-modal .modal-close{position:absolute;top:14px;right:14px;min-width:44px;min-height:44px;z-index:3}
.tutor-header h2{font-size:25px;margin:10px 0}.tutor-header>p:last-child{font-size:12px;color:var(--green-ink);margin:12px 0 22px;line-height:1.8}.tutor-header>p>span{font-size:10px;color:var(--muted)}
.tutor-layout{display:grid;grid-template-columns:minmax(260px,1.05fr) minmax(260px,1fr);gap:27px}.tutor-diagram{min-width:0}.tutor-position{font-size:11px;color:var(--muted);margin:0 0 10px;line-height:1.7}.tutor-board-wrap{position:relative}.tutor-board{display:grid;grid-template-columns:repeat(9,minmax(0,1fr));border:1.5px solid var(--box-line);border-radius:6px;overflow:hidden;aspect-ratio:1;background:var(--surface)}
.tutor-cell{aspect-ratio:1;min-width:0;border-right:1px solid var(--cell-line);border-bottom:1px solid var(--cell-line);display:grid;place-items:center;font-size:clamp(19px,2.2vw,28px);color:var(--ink);transition:background .45s,color .45s,box-shadow .45s;position:relative}.tutor-cell:nth-child(3n){border-right:1.5px solid var(--box-line)}.tutor-cell:nth-child(9n){border-right:0}.tutor-cell:nth-child(n+19):nth-child(-n+27),.tutor-cell:nth-child(n+46):nth-child(-n+54){border-bottom:1.5px solid var(--box-line)}.tutor-cell:nth-child(n+73){border-bottom:0}.tutor-cell.region{background:var(--green-soft)}.tutor-cell.evidence{background:#d9e9d4;color:#2d6042;font-weight:650}.tutor-cell.focus{background:#f4e7c6;box-shadow:inset 0 0 0 2px #cda758;z-index:1}.tutor-cell.excluded{background:var(--soft);opacity:.5}.tutor-cell.affected{background:#fae7df;box-shadow:inset 0 0 0 1px #d5a089}.tutor-notes{display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr);width:100%;height:100%;padding:3px}.tutor-notes i{display:grid;place-items:center;font:500 clamp(8px,1vw,11px) "DM Sans",sans-serif;color:#85947c;line-height:1}.tutor-notes i.tracked{color:#2d6d44;background:#d5e7c9;border-radius:3px;font-weight:700}.tutor-notes i.removed{color:#b75e4c;text-decoration:line-through;text-decoration-thickness:2px;animation:tutor-cross .7s ease both}
.tutor-links{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:2}.tutor-links path{fill:none;stroke:#658c69;stroke-width:.06;stroke-dasharray:35;animation:tutor-draw 1.5s ease both}.tutor-legend{font-size:9px;display:flex;justify-content:space-between;gap:5px;margin-top:12px;color:var(--muted)}.tutor-legend span:first-child{color:#68855e}.tutor-legend span:nth-child(2){color:#b89859}.tutor-legend span:last-child{color:#bd806e}.tutor-story{min-width:0;display:flex;flex-direction:column;gap:12px}.tutor-step-top{display:flex;justify-content:space-between;align-items:center;gap:8px;color:var(--muted);font-size:10px}.tutor-step-top select{font:inherit;color:var(--green-ink);background:var(--soft);border:1px solid var(--line);border-radius:6px;min-height:44px;padding:0 8px}.tutor-progress{height:3px;background:var(--soft);border-radius:3px;overflow:hidden}.tutor-progress i{display:block;height:100%;background:#a8b98c;transition:width .5s}.tutor-explanation h3,.tutor-task h3{font-size:17px;font-weight:500;line-height:1.6;margin:7px 0 10px}.tutor-explanation>p{font-size:13px;line-height:1.95;margin:0;color:var(--muted);min-height:76px}.tutor-candidates{display:flex;flex-wrap:wrap;gap:5px;align-items:center;margin-top:14px}.tutor-candidates>span{width:100%;color:var(--muted);font-size:10px;line-height:1.8;margin-bottom:3px}.tutor-candidates b{font-size:15px;width:26px;height:30px;display:grid;place-items:center;border-radius:5px;background:var(--soft);font-weight:500}.tutor-candidates b.possible{background:var(--green-soft);color:var(--green)}.tutor-candidates b.ruled-out{opacity:.3;text-decoration:line-through}.tutor-candidates b.just-removed{color:#b65e4d;animation:tutor-cross .7s ease both}.tutor-controls{display:grid;grid-template-columns:44px 1fr 44px 44px;gap:7px;margin-top:auto;padding-top:13px}.tutor-controls button{min-width:44px;min-height:44px;padding:8px;font-size:12px}.tutor-controls button:disabled{opacity:.3}.tutor-footnote{font-size:9px;color:var(--muted);line-height:1.8;margin:0}.tutor-task{padding:15px;border:1px solid var(--line);border-radius:10px;background:var(--soft)}.tutor-task[hidden]{display:none}.tutor-task h3{font-size:12px;margin:0 0 12px}.tutor-answers{display:grid;gap:7px}.tutor-answers.digits{grid-template-columns:repeat(5,1fr)}.tutor-answers button{min-height:44px;min-width:44px;background:var(--surface);border:1px solid var(--line);border-radius:6px;font-size:12px}.tutor-answers button:hover{background:var(--green-soft)}#tutor-feedback{font-size:11px;line-height:1.9;color:var(--muted);margin:12px 0}#tutor-feedback.correct{color:var(--green-ink)}#tutor-return{font-size:11px;min-height:44px}#tutor-return:disabled{opacity:.45}.tutor-frame-enter .tutor-cell.evidence{animation:tutor-evidence .85s ease both}.practice-mode .game-tools{display:none}.number-pad>#hint-button{min-height:44px;border:1px solid #d7e2ca;border-radius:8px;background:var(--green-soft);font-size:10px;gap:3px;display:flex}.number-pad>#hint-button .icon{width:18px;height:18px}
@keyframes tutor-evidence{from{box-shadow:inset 0 0 0 2px #8cb27d;background:#c0ddb5}to{box-shadow:inset 0 0 0 0 transparent}}
@keyframes tutor-cross{from{opacity:.2;transform:scale(1.25)}to{opacity:1;transform:scale(1)}}
@keyframes tutor-draw{from{stroke-dashoffset:35}to{stroke-dashoffset:0}}
[data-theme=dark] .tutor-cell.focus{background:#514731;color:#f2deb0}[data-theme=dark] .tutor-cell.evidence{background:#334e39;color:#d2e5c6}[data-theme=dark] .tutor-cell.affected{background:#583e35}[data-theme=dark] .tutor-notes i.tracked{background:#3e5940;color:#d8e8c9}
@media(max-width:650px) and (orientation:portrait){.hint-tutor-modal{width:calc(100vw - 16px);max-height:calc(100dvh - 16px);padding:18px}.tutor-header h2{font-size:22px;margin:5px 0}.tutor-header .modal-eyebrow{font-size:8px;margin-bottom:8px}.tutor-header>p:last-child{margin:7px 0 13px;font-size:11px}.tutor-header>p>span{display:block;font-size:9px}.tutor-layout{grid-template-columns:1fr;gap:13px}.tutor-board-wrap{width:min(100%,310px);margin:auto}.tutor-cell{font-size:23px}.tutor-notes i{font-size:9px}.tutor-position{margin-bottom:7px;font-size:10px}.tutor-legend{max-width:310px;margin:8px auto 0}.tutor-story{gap:7px}.tutor-explanation h3{font-size:15px;margin:4px 0}.tutor-explanation>p{font-size:12px;min-height:0;line-height:1.85}.tutor-candidates{margin-top:8px}.tutor-candidates>span{font-size:9px}.tutor-controls{padding-top:8px;position:sticky;bottom:-18px;z-index:4;background:var(--surface);padding-bottom:9px}.tutor-footnote{font-size:9px}.tutor-task{padding:12px}.tutor-answers.digits{grid-template-columns:repeat(5,minmax(0,1fr))}.tutor-answers button{min-width:0}}
@media(orientation:portrait) and (max-height:720px){.tutor-board-wrap{width:min(100%,240px)}.tutor-header>p:last-child{margin-bottom:9px}.tutor-legend{max-width:240px}.tutor-header h2{font-size:20px}.tutor-cell{font-size:20px}.tutor-notes{padding:1px}.tutor-notes i{font-size:7px}}
@media(orientation:landscape) and (max-height:500px){.hint-tutor-modal{width:calc(100vw - 12px);max-height:calc(100dvh - 12px);padding:13px 18px}.hint-tutor-modal .modal-close{top:3px;right:5px}.tutor-header{padding-right:35px;display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-bottom:8px}.tutor-header .modal-eyebrow{display:none}.tutor-header h2{font-size:18px;margin:0}.tutor-header>p:last-child{font-size:10px;margin:0}.tutor-header>p>span{display:none}.tutor-layout{grid-template-columns:minmax(160px,.9fr) minmax(235px,1.1fr);gap:16px}.tutor-board-wrap{width:min(100%,calc(100dvh - 105px));margin:auto}.tutor-position{font-size:9px;margin-bottom:5px}.tutor-cell{font-size:18px}.tutor-notes{padding:1px}.tutor-notes i{font-size:7px}.tutor-legend{font-size:8px;margin-top:6px}.tutor-story{max-height:calc(100dvh - 65px);overflow-y:auto;padding-right:3px;gap:6px}.tutor-step-top select{min-height:44px}.tutor-explanation h3{font-size:14px;margin:3px 0}.tutor-explanation>p{font-size:11px;line-height:1.8;min-height:0}.tutor-candidates{margin-top:6px}.tutor-candidates b{width:22px;height:25px;font-size:13px}.tutor-controls{position:sticky;bottom:0;background:var(--surface);z-index:3;padding:7px 0 4px;margin-top:4px}.tutor-footnote{display:none}.tutor-task{padding:9px}}
@media(prefers-reduced-motion:reduce){.tutor-cell,.tutor-progress i{transition:none}.tutor-links path,.tutor-frame-enter .tutor-cell.evidence,.tutor-notes i.removed,.tutor-candidates b.just-removed{animation:none}}

/* TapTap's logical window and menu measurements are supplied by GamePlatform. */
:root{--safe-top:max(env(safe-area-inset-top,0px),var(--host-top,0px));--safe-bottom:max(env(safe-area-inset-bottom,0px),var(--host-bottom,0px),var(--platform-ad-space,0px));--safe-left:max(env(safe-area-inset-left,0px),var(--host-left,0px));--safe-right:max(env(safe-area-inset-right,0px),var(--host-right,0px));--play-height:calc(var(--viewport-height,100dvh) - var(--safe-top) - var(--safe-bottom))}
body{padding-top:var(--safe-top);padding-left:var(--safe-left);padding-right:var(--safe-right)}
dialog{position:fixed;inset:calc(var(--safe-top) + 8px) 0 calc(var(--safe-bottom) + 8px);max-height:calc(var(--play-height) - 16px);margin:auto;overscroll-behavior:contain}

.mobile-menu{display:none}.mobile-menu-actions{display:grid;gap:10px}
@media(max-width:960px){
 body{min-height:0}.site-header{padding-top:0}.header-inner{height:46px;min-height:46px;padding:0 12px;flex-wrap:nowrap}.brand{font-size:18px;gap:8px}.brand small,.main-nav,.header-actions #help-button,.header-actions #settings-button{display:none}.brand-mark{padding:6px;grid-template-columns:repeat(3,4px);grid-template-rows:repeat(3,4px)}.header-actions{gap:4px}.icon-button,.mobile-menu{display:grid;width:44px;height:44px}.page-shell{padding:0 10px}.page-intro,.quiet-note,.site-footer{display:none}
 .game-layout{height:calc(var(--play-height) - 46px);min-height:0;display:flex;flex-direction:column;gap:5px;padding:5px 0}.sidebar{display:contents}.board-panel{order:2;flex:1;min-height:0;padding:0 7px 5px;display:flex;flex-direction:column;border-radius:10px}.board-heading,.board-bottom,.progress-track{display:none}.game-status{padding:3px 0;min-height:32px;flex-shrink:0}.pause-button{width:44px;height:32px;border-radius:6px}.board-wrap{min-height:0;flex:1;display:flex;align-items:center;justify-content:center}.sudoku-board{width:min(100%,calc(var(--play-height) - 284px));height:auto;flex-shrink:0}.cell{font-size:clamp(17px,5vw,24px)}.pencil-marks span{font-size:8px}
 .difficulty-panel{order:1;height:44px;min-height:44px;padding:0 5px;display:flex;gap:7px;align-items:center;border:0;background:transparent}.difficulty-panel .section-label,.difficulty-description{display:none}.difficulty-tabs{flex:1;margin:0;padding:0;gap:2px}.difficulty-tab{min-height:44px;padding:6px 2px}.new-game-button{width:44px;min-width:44px;height:44px;padding:0;justify-content:center;font-size:0}.new-game-button .button-arrow{display:none}
 .input-panel{order:3;display:grid;grid-template-columns:minmax(0,1fr) 112px;grid-template-rows:92px 44px;gap:5px;padding:0;border:0;border-radius:0;background:transparent;flex-shrink:0}.keypad-label,.input-note,.daily-card{display:none}.number-pad{grid-column:1/-1;grid-template-columns:repeat(5,minmax(0,1fr));gap:4px;margin:0}.number-key{height:44px;min-height:44px;padding:0;gap:0}.number-key strong{font-size:22px}.number-key .remaining{display:none}.game-tools{grid-column:1;margin:0;gap:2px;min-width:0}.tool-button{min-height:44px;min-width:44px;padding:0;gap:3px;font-size:9px}.tool-button>.icon,.tool-icon-wrap>.icon{width:18px;height:18px}.reward-hint-button{grid-column:2;grid-row:2;min-height:44px;margin:0;padding:4px 5px;font-size:11px;line-height:1.5;background:var(--green-soft)}
 .practice-guide{margin:0;padding:4px;min-height:36px;font-size:10px}.practice-guide p{font-size:10px}.practice-guide .text-button{min-height:36px}.game-layout:has(.practice-guide:not([hidden])) .sudoku-board{width:min(100%,calc(var(--play-height) - 325px))}
 .modal{padding:24px 18px;max-height:calc(var(--play-height) - 16px)}.toast{bottom:calc(var(--safe-bottom) + 12px);max-width:calc(100% - 24px)}
}
@media(max-width:960px) and (max-height:500px) and (orientation:landscape){
 .page-shell{max-width:none}.game-layout{display:grid;grid-template-columns:minmax(0,1fr) min(55vw,320px);grid-template-rows:44px minmax(0,1fr);gap:4px 10px}.board-panel{grid-column:1;grid-row:1/3;width:100%;height:100%;padding:0 4px}.board-wrap .sudoku-board{width:min(100%,calc(var(--play-height) - 88px))}.difficulty-panel{grid-column:2;grid-row:1}.input-panel{grid-column:2;grid-row:2;align-self:center;grid-template-columns:minmax(0,1fr) 100px;grid-template-rows:92px 44px}.game-status{font-size:10px}.cell{font-size:18px}
}

@media(max-width:960px){.site-header{margin-bottom:0}.page-shell,.practice-mode .page-shell{padding-top:0}.input-panel,.practice-mode .input-panel{width:100%;max-width:none;align-self:stretch;padding:0}.practice-mode .game-layout{gap:5px}.practice-mode .board-panel{padding:0 7px 5px}.practice-mode .board-wrap{width:100%;max-width:none}.practice-mode .practice-guide{position:static;padding:4px;margin:0;gap:2px 5px}.practice-mode .practice-guide>button{min-height:32px;font-size:9px}.practice-mode .practice-guide p{line-height:1.5;font-size:10px}.practice-mode .input-panel{grid-template-columns:1fr;grid-template-rows:92px}.practice-mode #number-pad{gap:4px}.game-layout:has(.practice-guide:not([hidden])) .sudoku-board{width:min(100%,calc(var(--play-height) - 260px))}}
.hint-tutor-modal[open] #modal-content{display:flex;flex-direction:column;height:100%;min-height:0}.hint-tutor-modal .tutor-layout{flex:1;min-height:0;overflow:auto;overscroll-behavior:contain}.hint-tutor-modal .tutor-controls{flex-shrink:0;margin-top:8px;background:var(--surface);padding:6px 0}.hint-tutor-modal .tutor-footnote{flex-shrink:0}
@media(max-width:960px){.hint-tutor-modal[open]{height:calc(var(--play-height) - 16px);overflow:hidden;padding:18px 14px 10px}.tutor-header h2{font-size:20px;margin-bottom:5px}.tutor-header>p{font-size:10px}.tutor-header .modal-eyebrow{margin-bottom:5px}.hint-tutor-modal .tutor-layout{gap:10px}.tutor-board-wrap{max-width:min(100%,calc(var(--play-height) * .33));margin:auto}.tutor-explanation>p{min-height:0;line-height:1.7;font-size:12px}.tutor-explanation h3{font-size:15px}.tutor-legend{margin-top:5px}.tutor-story{gap:7px}.tutor-candidates{margin-top:5px}.tutor-footnote{font-size:9px}}
@media(max-width:960px) and (max-height:500px) and (orientation:landscape){.site-header{margin:0}.header-inner{height:38px;min-height:38px}.game-layout{height:calc(var(--play-height) - 38px);padding:0}.practice-mode .page-shell{padding-top:0}.practice-mode .game-layout{grid-template-rows:70px minmax(0,1fr);gap:4px 10px}.practice-mode .practice-guide{position:absolute;left:calc(100% - min(55vw,320px));right:0;top:0;height:66px;padding:3px;overflow:auto}.practice-mode .input-panel{padding:0}.practice-mode .board-panel{padding:0 4px}.practice-mode .board-wrap .sudoku-board{width:min(100%,calc(var(--play-height) - 80px))}.hint-tutor-modal[open]{height:calc(var(--play-height) - 12px);padding:9px 14px}.hint-tutor-modal .tutor-layout{display:grid;grid-template-columns:140px 1fr;gap:10px}.tutor-header h2{font-size:17px;margin:0}.tutor-header .modal-eyebrow,.tutor-header>p:last-child,.tutor-legend,.tutor-footnote{display:none}.tutor-board-wrap{max-width:110px}.tutor-position{font-size:9px;margin:0}.tutor-step-top select{min-height:32px}.tutor-explanation h3{font-size:12px;margin:3px 0}.tutor-explanation>p{font-size:11px}.tutor-controls{min-height:44px;padding:0!important;margin-top:4px!important}}
@media(max-width:960px){.board-panel,.difficulty-panel{width:100%;max-width:none;align-self:stretch}.board-wrap{width:100%;max-width:none}.input-panel{height:141px;min-height:141px}.number-pad{grid-row:1;order:0}.game-tools{grid-row:2;order:0}.practice-mode .input-panel{height:92px;min-height:92px}.board-wrap .sudoku-board{width:min(100%,calc(var(--play-height) - 284px))}.practice-mode .board-wrap .sudoku-board{width:min(100%,calc(var(--play-height) - 260px))}}
@media(max-width:960px) and (max-height:500px) and (orientation:landscape){.board-panel{width:100%}.board-wrap .sudoku-board{width:min(100%,calc(var(--play-height) - 80px))}.practice-mode .board-wrap .sudoku-board{width:min(100%,calc(var(--play-height) - 80px))}}

.hint-tutor-modal[open]{display:flex;flex-direction:column}.hint-tutor-modal[open] #modal-content{height:auto;flex:1;min-height:0;overflow:hidden}.hint-tutor-modal .tutor-header{flex-shrink:0}

/* Match the academy's paper and ink hierarchy in teaching and supporting panels. */
:root:not([data-theme=dark]){--muted:#75816e;--line:#e0e5d7;--soft:#f6f7ef;--green-soft:#eaf0df}.modal:not(.growth-modal){border-color:var(--line);box-shadow:0 24px 100px #344a3026}.modal h2{font-family:"Songti SC",STSong,serif;letter-spacing:1px}.tutor-explanation>p{color:var(--ink);line-height:1.85}.tutor-task{background:var(--soft);border-color:var(--line)}.tutor-progress i{background:var(--green)}.tutor-controls{border-top:1px solid var(--line)}.tutor-candidates b{border-radius:6px}.modal-eyebrow{color:var(--muted)}.growth-entry .growth-brand small{color:var(--muted)}.tutor-footnote{font-size:10px}.tutor-legend{color:var(--muted)}

/* A curriculum and a notebook, rather than a second management game. */
.learning-hero{padding:22px 24px;background:linear-gradient(120deg,var(--green-soft),var(--surface));border:1px solid var(--line);border-radius:14px}.learning-hero h2{font:550 30px/1.45 "Songti SC",serif;letter-spacing:2px;margin:8px 0 12px}.learning-hero>p:last-of-type{font-size:12px;color:var(--muted);line-height:1.8}.learning-hero>div{display:flex;align-items:baseline;gap:10px;border-top:1px solid var(--line);padding-top:12px;margin-top:18px}.learning-hero strong{font-size:34px;font-weight:500;color:var(--green)}.learning-hero strong small{font-size:13px;color:var(--muted)}.learning-hero span,.learning-hero b{font-size:11px;font-weight:400;color:var(--muted)}.learning-hero b{margin-left:auto}.learning-path{display:grid;grid-template-columns:1fr 1fr;gap:0 18px;margin:18px 0}.learning-step{display:flex;gap:12px;min-height:130px;padding:18px 4px;border-bottom:1px solid var(--line)}.learning-number{font:500 20px/1.6 ui-monospace,monospace;color:var(--muted);border-top:2px solid var(--line);padding-top:7px;flex-shrink:0}.learning-step.is-practiced .learning-number{color:var(--green);border-color:var(--green)}.learning-step small{font-size:10px;color:var(--muted)}.learning-step h3{font-size:15px;color:var(--ink);margin:6px 0}.learning-step p{font-size:12px;line-height:1.7;color:var(--muted);margin:7px 0}.learning-step b{font-size:10px;font-weight:400;color:var(--green)}
@media(max-width:650px){.learning-hero{padding:18px}.learning-hero h2{font-size:25px}.learning-path{grid-template-columns:1fr}.learning-step{min-height:110px;padding:14px 3px}.learning-step h3{font-size:15px}.learning-step p{margin:5px 0}.modal:has(.learning-hero) .modal-actions{position:sticky;bottom:-24px;padding:10px 0;background:var(--surface);border-top:1px solid var(--line)}}
.modal:has(.learning-hero) .modal-actions{position:sticky;bottom:-24px;padding:10px 0;background:var(--surface);border-top:1px solid var(--line);z-index:2}
#modal:has(.learning-hero){width:min(760px,calc(100vw - 32px));max-height:calc(var(--play-height,100dvh) - 16px);inset:calc(var(--safe-top,0px) + 8px) 0 calc(var(--safe-bottom,0px) + 8px);margin:auto}

/* Keep iOS text sizing stable while the host changes orientation. */
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}