.sudoku-page{--blue:#225f9c;--trial:#835013}
body.sudoku-page main{max-width:820px;margin:0 auto;padding:0}
.game-panel{min-width:0;padding:16px 20px;overflow-wrap:anywhere}
body.sudoku-page header{padding:6px 0;background:transparent;color:var(--ink);gap:12px;flex-wrap:nowrap}
.sudoku-heading{display:flex;justify-content:space-between;align-items:center;gap:18px;margin:12px 0}.sudoku-heading h1{font-size:40px;margin:0}
.eyebrow{letter-spacing:.1em;font-size:12px;margin:0;color:#526b71}.clock{text-align:right}.clock span{font-size:12px;display:block}.clock output{font:500 26px/1.2 ui-monospace,monospace;font-variant-numeric:tabular-nums}
.level-name{display:block;font-size:12px;color:#526b71}.level-name:empty{display:none}.rules{color:#405b62}.start-row{display:flex;align-items:end;gap:12px;flex-wrap:wrap;margin:22px 0 10px}.start-row label{width:175px;max-width:100%}.start-row a{font-size:14px;color:inherit;align-self:center}
#message{color:#75451c;margin:10px 0}#message:empty,#storage-warning:empty{display:none}#retry{margin-bottom:12px}
body.sudoku-page.playing main{max-width:none;display:grid;grid-template-columns:1fr;width:100%}
.playing .eyebrow,.playing .rules{display:none}.playing .sudoku-heading{margin:4px 0}.playing .sudoku-heading h1{font-size:25px}
.board-area{min-width:0;width:100%;align-self:start}
#board{display:grid;grid-template-rows:repeat(9,minmax(0,1fr));border:3px solid #233e47;background:#233e47;width:100%;aspect-ratio:1;container-type:inline-size}
#board [role=row]{display:grid;grid-template-columns:repeat(9,minmax(0,1fr));min-height:0}
#board button{padding:0;border:0;border-right:1px solid #cbd5d6;border-bottom:1px solid #cbd5d6;border-radius:0;background:white;color:var(--blue);font-size:clamp(18px,5.8cqw,54px);min-width:0;min-height:0;line-height:1;position:relative;cursor:pointer;opacity:1;touch-action:manipulation}
#board button:nth-child(3),#board button:nth-child(6){border-right:3px solid #233e47}
#board [role=row]:nth-child(3)>button,#board [role=row]:nth-child(6)>button{border-bottom:3px solid #233e47}
#board button.fixed{background:#edf1ed;color:#183841;font-weight:700}#board button.hinted{background:#e4f0e6}#board button.tentative{color:var(--trial);background:#fff1cf;font-style:italic}
#board button.selected{box-shadow:inset 0 0 0 3px #39779b;background:#e5f0f7}#board button.hint-target{box-shadow:inset 0 0 0 4px #cd773c;background:#fff0d7}
#board button:focus-visible{outline:3px solid #286a9e;outline-offset:-3px;z-index:1}
.keypad{display:grid;grid-template-columns:repeat(9,minmax(0,1fr));gap:4px;margin:8px 0}.keypad button{padding:6px 0;min-width:0;min-height:40px;background:#e3eaf0;color:#183c53;font-size:22px;touch-action:manipulation}
.edit-actions{display:flex;gap:8px;margin-bottom:10px}.edit-actions button{flex:1;padding:6px;font-size:14px;min-height:36px}.quiet{background:transparent;color:var(--ink);border:1px solid #aebdc1}
.game-tools{display:grid;grid-template-columns:1fr 1fr;gap:10px}.game-tools p{margin:0}.game-tools>.legend,.game-tools>.privacy-note,#give-up-confirm{grid-column:1/-1}
.legend{font-size:13px;color:#48616a}.tool-card{min-width:0;background:#fff;border:1px solid #dce0dc;border-radius:14px;padding:12px}.tool-card button{width:100%;padding:8px;font-size:15px}.tool-card p{font-size:13px;margin:5px 0}.tool-card small{display:block;color:#50686c;line-height:1.4;font-size:12px}
.hint-card{display:grid;grid-template-columns:auto minmax(0,1fr);align-items:start;gap:6px}.hint-card>small{grid-column:1/-1}.hint-card strong{font-size:13px;font-weight:500}
.tool-card .hint-ring{width:62px;height:62px;padding:3px;border:0;border-radius:50%;background:transparent;cursor:grab;touch-action:none;user-select:none;-webkit-user-select:none}.hint-ring:active{cursor:grabbing}.hint-ring:focus-visible{outline:3px solid #286a9e;outline-offset:3px}
.lifebuoy{display:block;width:56px;height:56px;border:1px solid #b75530;border-radius:50%;background:conic-gradient(from -35deg,#d77646 0deg 70deg,#fff6e3 70deg 90deg,#d77646 90deg 160deg,#fff6e3 160deg 180deg,#d77646 180deg 250deg,#fff6e3 250deg 270deg,#d77646 270deg 340deg,#fff6e3 340deg);box-shadow:inset 0 0 0 4px #ffffff77,0 2px 4px #102a3626;position:relative;pointer-events:none}
.lifebuoy:after{content:'';position:absolute;inset:15px;border:1px solid #b75530;border-radius:50%;background:var(--paper);box-shadow:0 0 0 3px #ffffff66}
#hint-ghost{position:fixed;left:0;top:0;z-index:1000;transform:translate(-50%,-50%);pointer-events:none;opacity:.9}
.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}
#trial-actions{display:grid;gap:6px;margin-top:10px}.privacy-note{font-size:12px;color:#52666c;padding:4px 0}.result{background:#e6efe6;border:1px solid #b7cbb9;border-radius:14px;padding:16px;margin-top:16px}.result h2{margin:0 0 8px;font-size:22px}.result p{margin:6px 0}
#history{margin:20px 0;border-top:1px solid #cdd7d7;padding-top:12px}summary{cursor:pointer}#history>p{font-size:13px;color:#52666c}.history-scroll{overflow-x:auto}.sudoku-page table{font-size:13px}.sudoku-page th{white-space:nowrap}
.sudoku-page button:disabled{cursor:default;opacity:.45}.sudoku-page #board button:disabled{opacity:1}#give-up-confirm{padding:12px;background:#fff0da;border-radius:10px}#give-up-confirm button{margin:8px 5px 0 0}
@media(orientation:landscape){body.sudoku-page.playing main{grid-template-columns:100dvh minmax(0,1fr)}.playing .board-area{position:sticky;top:0}.playing .game-panel{height:100dvh;overflow-y:auto;overscroll-behavior:contain}}
@media(max-width:600px),(orientation:landscape) and (max-height:600px){.game-panel{padding:8px 12px}.tool-card{padding:8px}.hint-card{grid-template-columns:auto 1fr;gap:4px}.hint-card strong{font-size:12px}.game-tools>button{font-size:14px;padding:8px}.game-tools{gap:8px}}
@media(orientation:landscape) and (max-aspect-ratio:4/3){.playing .game-panel{padding:6px}.playing .game-tools{grid-template-columns:1fr}.playing header{flex-wrap:wrap}.playing .keypad{grid-template-columns:repeat(3,1fr)}.playing .edit-actions{flex-direction:column}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
@media(orientation:landscape) and (max-aspect-ratio:6/5){body.sudoku-page.playing main{grid-template-columns:1fr}.playing .board-area{position:static;width:100dvh;max-width:100%;margin:auto}.playing .game-panel{height:auto;overflow:visible;padding:12px}.playing .game-tools{grid-template-columns:1fr 1fr}.playing .keypad{grid-template-columns:repeat(9,minmax(0,1fr))}.playing .edit-actions{flex-direction:row}}

#board button.conflict{color:#a72222;background:#ffe2df;text-decoration:underline;text-decoration-thickness:2px}#buffer-full{color:#835013;font-weight:600}#commit-rule{margin-top:8px}