:root{--wood-dark: #4a321f;--wood-mid: #6b482d;--wood-light: #7c5536;--paper-bg: #fdfbf7;--paper-panel: #f4efe6;--paper-border: #dcd3c2;--ink-blue: #1d4ed8;--ink-dark: #1e293b;--text-muted: #64748b;--line-blue: #93c5fd;--line-red: #f87171;--primary: #2563eb;--accent: #d97706;--success: #16a34a;--danger: #dc2626;--star-earned: #f59e0b;--star-earned-stroke: #b45309;--star-empty: #cbd5e1;--radius-lg: 18px;--radius-md: 12px}*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent;user-select:none;-webkit-user-select:none}html,body{width:100%;height:100%;overflow:hidden;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;color:var(--ink-dark);touch-action:none;overscroll-behavior:none}.desk-surface{width:100%;height:100dvh;display:flex;justify-content:center;align-items:stretch;background-color:var(--wood-mid);background-image:radial-gradient(ellipse at center,#ffffff0f,#00000059),repeating-linear-gradient(90deg,rgba(55,34,18,.16) 0px,rgba(55,34,18,.16) 2px,transparent 2px,transparent 16px),linear-gradient(180deg,var(--wood-light) 0%,var(--wood-mid) 50%,var(--wood-dark) 100%);padding:env(safe-area-inset-top,8px) 12px env(safe-area-inset-bottom,10px)}.notebook-sheet{display:flex;flex-direction:column;width:100%;max-width:820px;height:100%;background:var(--paper-bg);border-radius:18px;border:1px solid #d4c8b4;box-shadow:0 14px 34px #180e067a,0 3px 8px #180e0640,4px 0 #efeae0,8px 0 #e2dacb;padding:10px 12px;gap:7px;overflow:hidden}.topbar{display:flex;align-items:center;justify-content:space-between;background:var(--paper-panel);padding:6px 10px;border-radius:var(--radius-md);border:1px solid var(--paper-border);flex-shrink:0}.brand{display:flex;align-items:center;gap:10px}.title-group{display:flex;flex-direction:column}.app-title{font-size:1.02rem;font-weight:800;color:var(--ink-dark);letter-spacing:-.02em}.badge{font-size:.72rem;color:var(--primary);font-weight:700}.stats-bar{display:flex;align-items:center;gap:8px}.star-counter{display:flex;align-items:center;gap:5px;background:#fffbeb;border:1.5px solid #fcd34d;color:#b45309;padding:4px 11px;border-radius:999px;font-weight:800;font-size:.95rem}.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:10px;border:1px solid var(--paper-border);background:#fff;color:var(--ink-dark);cursor:pointer;box-shadow:0 1px 2px #0000000d;transition:transform .1s ease,background .15s ease}.icon-btn:active{transform:scale(.93)}.toolbar-row{display:flex;align-items:center;justify-content:space-between;gap:8px;flex-shrink:0}.group-pills{display:flex;gap:5px;overflow-x:auto;scrollbar-width:none}.group-pills::-webkit-scrollbar{display:none}.pill-btn{padding:5px 11px;border-radius:8px;border:1px solid var(--paper-border);background:var(--paper-panel);color:var(--text-muted);font-weight:700;font-size:.78rem;cursor:pointer;white-space:nowrap}.pill-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}.sort-toggle-btn{padding:5px 10px;border-radius:8px;border:1px solid var(--paper-border);background:#fff;color:var(--ink-dark);font-size:.76rem;font-weight:700;cursor:pointer;white-space:nowrap;flex-shrink:0}.quick-strip{display:flex;gap:6px;overflow-x:auto;padding:2px 2px 4px;flex-shrink:0;scrollbar-width:none;touch-action:pan-x}.quick-strip::-webkit-scrollbar{display:none}.strip-item{flex:0 0 auto;min-width:48px;height:48px;border-radius:11px;border:1.5px solid var(--paper-border);background:#fff;color:var(--ink-dark);font-weight:800;font-size:1.12rem;display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;gap:2px;transition:all .15s ease}.strip-item.active{background:#eff6ff;border-color:var(--primary);box-shadow:0 0 0 2px #2563eb33;transform:translateY(-1px)}.stars-row{display:inline-flex;align-items:center;gap:1px;line-height:1}.star-unit{font-size:.72rem;line-height:1;display:inline-block}.star-unit.earned{color:var(--star-earned);text-shadow:0 0 1px var(--star-earned-stroke);transform:scale(1.08)}.star-unit.empty{color:var(--star-empty);opacity:.65}.status-panel{display:flex;align-items:center;justify-content:space-between;background:var(--paper-panel);padding:7px 12px;border-radius:var(--radius-md);border:1px solid var(--paper-border);flex-shrink:0;gap:10px}.letter-info{display:flex;align-items:center;gap:10px;min-width:0}.letter-badge{width:44px;height:44px;border-radius:11px;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:900;flex-shrink:0;box-shadow:0 3px 8px #2563eb40}.letter-text{min-width:0}.letter-text h2{font-size:.88rem;font-weight:700;color:var(--ink-dark);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.letter-text p{font-size:.76rem;color:var(--text-muted)}.round-indicators{display:flex;gap:5px;flex-shrink:0}.round-dot{width:27px;height:27px;border-radius:50%;background:#fff;color:var(--text-muted);display:flex;align-items:center;justify-content:center;font-size:.78rem;font-weight:800;border:2px solid var(--paper-border)}.round-dot.active{border-color:var(--accent);color:#92400e;background:#fef3c7}.round-dot.done{background:var(--success);color:#fff;border-color:#15803d}.board-container{position:relative;flex:1 1 auto;min-height:220px;background:#fff;border-radius:var(--radius-md);border:2px solid #cbd5e1;overflow:hidden;box-shadow:inset 0 2px 8px #0f172a0d;touch-action:none}#game-canvas{width:100%;height:100%;display:block;touch-action:none;cursor:crosshair}.warning-toast{position:absolute;top:12px;left:50%;transform:translate(-50%);background:var(--danger);color:#fff;padding:9px 16px;border-radius:999px;font-weight:700;font-size:.85rem;display:flex;align-items:center;gap:8px;box-shadow:0 8px 20px #dc262659;pointer-events:none;white-space:nowrap;animation:popBounce .25s ease}@keyframes popBounce{0%{transform:translate(-50%,-14px) scale(.88);opacity:0}to{transform:translate(-50%) scale(1);opacity:1}}.bottom-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;flex-shrink:0}.ctrl-btn{height:44px;border:1px solid transparent;border-radius:var(--radius-md);font-weight:700;font-size:.84rem;cursor:pointer;display:flex;align-items:center;justify-content:center;padding:0 8px;transition:transform .1s ease}.ctrl-btn:active{transform:scale(.96)}.ctrl-btn.primary{background:var(--primary);color:#fff}.ctrl-btn.accent{background:#f59e0b;color:#fff}.ctrl-btn.secondary{background:var(--paper-panel);border-color:var(--paper-border);color:var(--ink-dark)}.modal-backdrop{position:fixed;inset:0;background:#1e140ca6;backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;padding:14px;z-index:100}.modal-card{width:100%;max-width:640px;max-height:88dvh;background:var(--paper-bg);border-radius:var(--radius-lg);border:2px solid var(--paper-border);box-shadow:0 20px 45px #00000073;display:flex;flex-direction:column;overflow:hidden}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background:var(--paper-panel);border-bottom:1px solid var(--paper-border)}.modal-header h2{font-size:1.05rem}.modal-controls{padding:10px 16px;background:#f8f5ee;border-bottom:1px solid var(--paper-border);display:flex;flex-direction:column;gap:8px}.category-tabs{display:flex;gap:6px;overflow-x:auto}.tab-btn{flex:1;padding:7px 10px;border-radius:8px;border:1px solid var(--paper-border);background:#fff;color:var(--text-muted);font-size:.78rem;font-weight:700;cursor:pointer;white-space:nowrap}.tab-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}.sort-bar{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.sort-bar-label{font-size:.78rem;font-weight:700;color:var(--text-muted)}.sort-options{display:flex;gap:6px;flex:1}.sort-opt-btn{flex:1;padding:6px 10px;border-radius:7px;border:1px solid var(--paper-border);background:#fff;color:var(--ink-dark);font-size:.76rem;font-weight:600;cursor:pointer}.sort-opt-btn.active{background:#fef3c7;border-color:#f59e0b;color:#92400e;font-weight:700}.char-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(66px,1fr));gap:8px;padding:14px 16px;overflow-y:auto;touch-action:pan-y}.grid-card{height:72px;border-radius:12px;background:#fff;border:1.5px solid var(--paper-border);color:var(--ink-dark);display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;gap:5px}.grid-card.active{border-color:var(--primary);background:#eff6ff;box-shadow:0 0 0 2px #2563eb2e}.grid-card .char-label{font-size:1.45rem;font-weight:900}.grid-card .star-unit{font-size:.85rem}.modal-footer{padding:10px 16px;background:var(--paper-panel);border-top:1px solid var(--paper-border);display:flex;justify-content:flex-end}.danger-link{background:#fff;border:1px solid #fca5a5;color:var(--danger);padding:6px 12px;border-radius:8px;font-size:.78rem;font-weight:700;cursor:pointer}.hidden{display:none!important}