:root{color-scheme:light;--bg: #f7f5ef;--paper: #fffdf7;--ink: #1d252f;--muted: #637082;--line: #d8d2c5;--line-strong: #8b7357;--accent: #cc4b37;--accent-soft: #ffe1d8;--gold: #d99a27;--teal: #267b72;--blue: #4067b1;--filled: #fff8dd;--selected: #fff0d2;--shadow: 0 18px 48px rgba(42, 37, 29, .12);--radius: 8px;--cell-size: clamp(66px, 7.4vw, 112px)}*{box-sizing:border-box}body{margin:0;min-width:980px;color:var(--ink);background:radial-gradient(circle at top left,rgba(204,75,55,.14),transparent 28rem),radial-gradient(circle at 90% 10%,rgba(38,123,114,.12),transparent 22rem),linear-gradient(180deg,#faf8f2 0%,var(--bg) 100%);font-family:Hiragino Sans,Yu Gothic,Meiryo,system-ui,-apple-system,BlinkMacSystemFont,sans-serif;line-height:1.5}button,select,input,textarea{font:inherit}button{min-height:36px;border:1px solid var(--line-strong);border-radius:6px;color:var(--ink);background:#fffaf0;cursor:pointer;transition:transform .14s ease,border-color .14s ease,background .14s ease}button:hover{border-color:var(--accent);background:#fff2df}button.danger-button{border-color:#b33d35;color:#8f241f;background:#fff4f2}button.danger-button:hover{border-color:#8f241f;background:#ffe2dc}button:focus-visible,select:focus-visible,input:focus-visible,textarea:focus-visible,.board-stage:focus-visible{outline:3px solid rgba(64,103,177,.35);outline-offset:3px}.app-shell{width:min(1760px,calc(100vw - 32px));margin:0 auto;padding:20px 0 28px}.app-header{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;padding:12px 4px 18px}.eyebrow{margin:0 0 4px;color:var(--teal);font-size:.83rem;font-weight:700;letter-spacing:0}h1{margin:0;font-size:clamp(2rem,3.1vw,3.3rem);line-height:1.05;letter-spacing:0}.subtitle{margin:8px 0 0;color:var(--muted);font-size:1rem}.header-actions,.button-row,.timer-controls{display:flex;flex-wrap:wrap;gap:8px}.header-actions button,.button-row button,.timer-controls button{padding:0 14px}.language-switch{display:inline-flex;align-items:center;gap:8px;min-height:36px;padding:0 10px;border:1px solid var(--line);border-radius:6px;background:#fffdf7d6;color:var(--muted);font-size:.9rem;font-weight:700}.language-switch select{min-height:28px;border:1px solid var(--line);border-radius:5px;background:#fff;color:var(--ink)}.app-layout{display:grid;grid-template-columns:minmax(760px,1fr) 340px;gap:20px;align-items:start}.board-section{min-width:0}.focus-bar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:12px;padding:10px 12px;border:1px solid var(--line);border-radius:var(--radius);background:#fffdf7db}.focus-label{display:inline-block;margin-right:8px;color:var(--muted);font-size:.83rem}#modeHint{margin:0;color:var(--muted);font-size:.88rem;text-align:right}.board-stage{overflow:auto;padding:16px;border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(#ffffffb3,#ffffffb3),repeating-linear-gradient(0deg,transparent,transparent 31px,rgba(139,115,87,.08) 32px),repeating-linear-gradient(90deg,transparent,transparent 31px,rgba(139,115,87,.08) 32px);box-shadow:var(--shadow)}.hanabi-grid{display:grid;grid-template-columns:repeat(3,max-content);gap:clamp(10px,1.2vw,18px);justify-content:center;min-width:max-content}.hanabi-board{position:relative;display:grid;grid-template-columns:repeat(3,var(--cell-size));grid-template-rows:repeat(3,var(--cell-size));gap:3px;padding:6px;border:2px solid rgba(139,115,87,.4);border-radius:var(--radius);background:#fffdf7eb;transition:border-color .18s ease,background .18s ease,box-shadow .18s ease}.hanabi-board.center-board{border-color:#cc4b379e;background:#fff9ef}.hanabi-board.selected-board{border-color:var(--accent);box-shadow:0 0 0 4px #cc4b371f}.hanabi-board.board-flash{animation:boardFlash .52s ease}.board-tag{position:absolute;top:8px;left:8px;z-index:2;padding:2px 6px;border-radius:999px;color:#4d463c;background:#ffffffd6;font-size:.72rem;font-weight:700;pointer-events:none}.cell{position:relative;min-width:0;min-height:0;border:1px solid var(--line);border-radius:6px;background:#fffefb;transition:border-color .14s ease,box-shadow .14s ease,background .14s ease,transform .14s ease}.cell:after{content:attr(data-key);position:absolute;right:6px;bottom:4px;color:#1d252f52;font-size:.7rem;font-weight:700;pointer-events:none;transition:opacity .14s ease}.cell.has-input:after{opacity:0}.guides-off .cell:after{opacity:0}.cell.filled{background:var(--filled);border-color:#d3b56b}.cell.sync-cell{box-shadow:inset 0 0 0 2px #267b7226}.cell.selected-cell{z-index:3;border-color:var(--accent);background:var(--selected);box-shadow:0 0 0 3px #cc4b3733,0 8px 18px #2a251d1f}.cell.pop{animation:cellPop .18s ease}.cell.sync-flash{animation:syncFlash .62s ease}.cell-input{display:block;width:100%;height:100%;padding:10px 8px 18px;resize:none;border:0;border-radius:5px;color:var(--ink);background:transparent;font-size:clamp(.82rem,.92vw,1rem);line-height:1.35;overflow:auto}.cell-input::placeholder{color:#637082ad}.side-panel{display:grid;gap:12px}.panel{padding:14px;border:1px solid var(--line);border-radius:var(--radius);background:#fffdf7eb;box-shadow:0 8px 28px #2a251d14}.panel h2,.details-panel summary{margin:0 0 10px;font-size:1rem;letter-spacing:0}.details-panel summary{cursor:pointer;font-weight:700}.details-panel p,.details-panel ol{margin:10px 0 0;color:#334155;font-size:.92rem}.details-panel ol{padding-left:1.35rem}.shortcut-note{border-top:1px solid var(--line);padding-top:10px}.panel-heading{display:flex;align-items:center;justify-content:space-between;gap:10px}.status-pill{padding:2px 8px;border-radius:999px;color:#27413f;background:#dff0ea;font-size:.78rem;font-weight:700}.timer-display{margin:6px 0 10px;color:var(--teal);font-size:3rem;font-variant-numeric:tabular-nums;font-weight:800;line-height:1}.timer-display.ending{color:var(--accent)}.field-label{display:block;margin:12px 0 6px;color:var(--muted);font-size:.83rem;font-weight:700}.timer-setting{display:grid;grid-template-columns:1fr 72px auto;gap:8px;align-items:center}.timer-setting select,.timer-setting input{width:100%;min-height:36px;border:1px solid var(--line);border-radius:6px;background:#fff}.counts{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin:0}.counts div{padding:8px;border:1px solid var(--line);border-radius:6px;background:#fffefa}.counts dt{color:var(--muted);font-size:.78rem}.counts dd{margin:2px 0 0;font-size:1.3rem;font-weight:800}.output-preview{width:100%;min-height:156px;resize:vertical;border:1px solid var(--line);border-radius:6px;padding:10px;background:#fff;color:#243040;font-size:.88rem}.toggle-row{display:flex;gap:8px;align-items:center;margin-top:12px;color:#334155;font-size:.9rem}.app-message{min-height:1.4em;margin:0;color:var(--blue);font-size:.9rem;font-weight:700}.animations-off *,.animations-off *:before,.animations-off *:after{animation:none!important;transition:none!important}@keyframes cellPop{0%{transform:scale(1)}50%{transform:scale(1.035)}to{transform:scale(1)}}@keyframes boardFlash{0%,to{box-shadow:0 0 0 4px #cc4b371f}45%{box-shadow:0 0 0 8px #d99a274d}}@keyframes syncFlash{0%{background:var(--filled)}45%{background:#e5f3ef}to{background:var(--filled)}}@media(max-width:1180px){body{min-width:760px}.app-layout{grid-template-columns:1fr}.side-panel{grid-template-columns:repeat(2,minmax(0,1fr))}.details-panel,.app-message{grid-column:1 / -1}}@media(max-width:820px){body{min-width:0}.app-shell{width:min(100vw - 18px,1760px);padding-top:10px}.app-header,.focus-bar{align-items:flex-start;flex-direction:column}#modeHint{text-align:left}.side-panel{grid-template-columns:1fr}:root{--cell-size: 74px}}@media print{body{min-width:0;background:#fff}.app-shell{width:100%;padding:0}.header-actions,.focus-bar,.side-panel{display:none!important}.app-header{padding:0 0 10px}.eyebrow,.subtitle{color:#333}h1{font-size:20pt}.app-layout{display:block}.board-stage{overflow:visible;padding:0;border:0;box-shadow:none;background:#fff}.hanabi-grid{width:100%;grid-template-columns:repeat(3,1fr);gap:5mm}.hanabi-board{grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,23mm);gap:1mm;break-inside:avoid}.cell-input{color:#000;font-size:8pt;overflow:hidden}}