:root{--bg-base:#0d0f12;--bg-panel:#16191d;--bg-panel-hover:#1d2126;--text-primary:#eef1f3;--text-muted:#8b939c;--accent-setup:#5b8dee;--accent-algorithm:#3ba776;--accent-live:#f2b632;--border-subtle:#2a2f36;--accent-danger:#e05252;--accent-danger-bg:#e0525214;--accent-contrast-text:#0d0f12;--panel-muted-bg:#ffffff0a;--font-mono:"JetBrains Mono", "Courier New", monospace;--font-sans:"Inter", system-ui, sans-serif;--accent-success:#2d9e5f;--accent-fail:#c94040;--cube-viewport-bg:#0d0f12;--moveslog-glow:#fff;--moveslog-glow-bg:#0a0a0a;--moveslog-active-bg:#000;--moveslog-active-text:#fff;--viewport-btn-bg:#16191d;--viewport-btn-border:#2a2f36;--viewport-btn-hover:#fff}:root[data-theme=light]{--bg-base:#f4f5f7;--bg-panel:#fff;--bg-panel-hover:#eceef1;--text-primary:#14171c;--text-muted:#55606b;--border-subtle:#d7dbe0;--accent-setup:#2f5fc7;--accent-algorithm:#1f8f5c;--accent-live:#b8790a;--accent-contrast-text:#fff;--panel-muted-bg:#0f17200d;--accent-success:#1f8f4e;--accent-fail:#b83333;--moveslog-active-bg:#14171c;--moveslog-active-text:#fff}body{background:var(--bg-base);color:var(--text-primary);font-family:var(--font-sans);margin:0}.btn-outline:active{opacity:.85;transform:scale(.97)}.btn-outline{transition:background .15s,border-color .15s,color .15s}.btn-outline:hover:not(:disabled){background:var(--bg-panel-hover);border-color:var(--accent-setup)}.btn-row{gap:8px;margin-top:8px;display:flex}.panel-desc{color:var(--text-muted);margin-bottom:10px;font-size:12px;line-height:1.5}.panel-hint{color:var(--text-muted);font-size:12px;line-height:1.5}.checkbox-row{align-items:center;gap:6px;font-size:13px;display:flex}.section-divider{border-top:1px solid var(--border-subtle);margin:4px 0 12px}.scramble-chip{background:var(--panel-muted-bg);border-radius:4px;justify-content:space-between;align-items:center;gap:8px;margin-top:8px;padding:6px 8px;display:flex}.scramble-chip-text{font-family:var(--font-mono);word-break:break-word;font-size:12px}.scramble-history-list{flex-direction:column;flex:1;gap:1px;margin-top:4px;display:flex;overflow-y:auto}.scramble-history-item{font-family:var(--font-mono);color:var(--text-muted);word-break:break-word;border-radius:4px;padding:5px 6px;font-size:11px;transition:background .1s,color .1s}.scramble-history-item:hover{background:var(--bg-panel-hover);color:var(--text-primary)}.scramble-history-clear{color:var(--text-muted);cursor:pointer;text-align:left;background:0 0;border:none;padding:4px 0;font-size:10px}.icon-btn{width:34px;height:34px;color:var(--text-primary);border:1px solid var(--border-subtle);cursor:pointer;background:0 0;border-radius:6px;flex-shrink:0;justify-content:center;align-items:center;transition:background .15s,border-color .15s;display:flex;position:relative}.icon-btn:hover{background:var(--bg-panel-hover);border-color:var(--accent-setup)}.icon-btn-badge{background:var(--accent-setup);min-width:15px;height:15px;color:var(--accent-contrast-text);text-align:center;border-radius:999px;padding:0 3px;font-size:9px;font-weight:700;line-height:15px;position:absolute;top:-5px;right:-5px}.history-popover{z-index:20;background:var(--bg-panel);border:1px solid var(--border-subtle);border-radius:8px;flex-direction:column;width:220px;max-width:70vw;max-height:320px;padding:10px;display:flex;position:absolute;top:calc(100% + 6px);right:0;box-shadow:0 8px 24px #00000040}.history-popover-header{color:var(--text-muted);text-transform:uppercase;letter-spacing:.4px;justify-content:space-between;align-items:center;margin-bottom:6px;font-size:11px;display:flex}.method-toggle{border:1px solid var(--border-subtle);border-radius:6px;gap:0;margin-bottom:10px;display:flex;overflow:hidden}.method-toggle button{border:none;border-radius:0}.practice-lid{z-index:5;text-align:center;background:var(--bg-panel);border-bottom:1px solid var(--border-subtle);opacity:1;flex-direction:column;justify-content:center;align-items:center;gap:10px;padding:0 24px;transition:transform .45s cubic-bezier(.22,.8,.28,1),opacity .3s;display:flex;position:absolute;inset:0;transform:translateY(0);box-shadow:0 16px 32px #00000059}.practice-lid-lifted{opacity:0;pointer-events:none;transform:translateY(-110%)}.practice-lid-icon{width:56px;height:56px;color:var(--text-muted)}.practice-lid-title{font-family:var(--font-mono);color:var(--text-primary);font-size:16px;font-weight:600}.practice-lid-hint{color:var(--text-muted);font-size:13px}.moveslog-scroll{scrollbar-width:none;-ms-overflow-style:none}.moveslog-scroll::-webkit-scrollbar{display:none}.sidebar-nav-card{border:1px solid var(--border-subtle);color:var(--text-primary);border-radius:5px;margin-bottom:6px;padding:8px 10px;font-size:12px;text-decoration:none;transition:border-color .15s,background .15s;display:block}.sidebar-nav-card:hover{border-color:var(--accent-setup);background:var(--bg-panel-hover)}.sidebar-nav-link{color:var(--text-muted);justify-content:center;align-items:center;gap:6px;padding:8px 10px;font-size:12px;text-decoration:none;transition:color .15s;display:flex}.sidebar-nav-link:hover{color:var(--text-primary)}.astro-route-announcer{clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;top:0;left:0;overflow:hidden}html,body{margin:0}