:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;--bg:#f3f5f8;--panel:#fff;--panel-border:#d8dde5;--text:#1a1d24;--text-dim:#5b6270;--accent:#0e7490;--accent-dim:#cffafe;--danger:#dc2626;--radius:10px;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}:root:not([data-theme=light]){--bg:#0f1115;--panel:#171a21;--panel-border:#2a2f3a;--text:#e8eaed;--text-dim:#9aa1ac;--accent:#6ee7ff;--accent-dim:#2a5a66;--danger:#ff6e6e}}:root[data-theme=dark]{--bg:#0f1115;--panel:#171a21;--panel-border:#2a2f3a;--text:#e8eaed;--text-dim:#9aa1ac;--accent:#6ee7ff;--accent-dim:#2a5a66;--danger:#ff6e6e}*{box-sizing:border-box}html,body{background:var(--bg);height:100%;color:var(--text);margin:0;padding:0}#app{flex-direction:column;min-height:100vh;display:flex}.app-header{border-bottom:1px solid var(--panel-border);background:var(--panel);justify-content:space-between;align-items:center;gap:1rem;padding:.9rem 1.4rem;display:flex}.app-header h1{letter-spacing:.01em;margin:0;font-size:1.15rem;font-weight:600}.app-header .subtitle{color:var(--text-dim);margin-top:.15rem;font-size:.8rem}.mode-tabs{background:var(--bg);border:1px solid var(--panel-border);border-radius:999px;gap:.25rem;padding:.2rem;display:flex}.mode-tabs button{color:var(--text-dim);cursor:pointer;background:0 0;border:none;border-radius:999px;padding:.4rem .9rem;font-size:.85rem;transition:background .15s,color .15s}.mode-tabs button.active{background:var(--accent-dim);color:var(--accent)}.app-body{flex:1;grid-template-columns:280px 1fr;gap:1rem;min-height:0;padding:1rem 1.4rem 1.4rem;display:grid}@media (width<=760px){html,body{overflow:hidden}#app{height:100dvh;min-height:0;overflow:hidden}.app-header{display:none}.lesson-scroll{flex:1;min-height:0;overflow-y:auto}.lesson-nav{border-top:1px solid var(--panel-border);flex:none;margin-top:.4rem;padding-top:.4rem}.app-body{flex-direction:column;gap:.5rem;min-height:0;padding:.5rem .75rem 0;display:flex}#viz-panel{flex:1;order:1;min-height:0;padding:.75rem}#controls-panel{border-radius:16px 16px 0 0;flex:none;order:2}}.placeholder{color:var(--text-dim);border:1px dashed var(--panel-border);border-radius:var(--radius);text-align:center;padding:2rem;font-size:.9rem}.panel{background:var(--panel);border:1px solid var(--panel-border);border-radius:var(--radius);padding:1rem}#viz-panel{min-height:0;overflow:auto}.is-hidden{display:none!important}.lesson-panel{margin:1rem 1.4rem 0}.lesson-progress{color:var(--text-dim);text-transform:uppercase;letter-spacing:.06em;margin-left:auto;font-size:.75rem}.lesson-title{margin:0 0 .4rem;font-size:1.05rem}.lesson-body{color:var(--text-dim);max-width:70ch;margin:0 0 1rem;font-size:.88rem;line-height:1.5}.lesson-nav{align-items:center;gap:.6rem;display:flex}.lesson-nav .btn{flex:none;padding:.4rem .9rem}.lesson-nav .btn.is-highlighted{animation:2s ease-in-out infinite highlight-glow}.controls-form{flex-direction:column;gap:.9rem;display:flex}.control-field{border-radius:8px;flex-direction:column;gap:.2rem;margin:-.25rem;padding:.25rem;transition:background .15s,box-shadow .15s;display:flex}.control-label{color:var(--text-dim);font-size:.78rem}.control-field input,.control-field select{background:var(--bg);border:1px solid var(--panel-border);color:var(--text);border-radius:6px;padding:.4rem .5rem;font-size:.9rem}.control-field input:focus,.control-field select:focus{border-color:var(--accent);outline:none}.control-actions{flex-flow:wrap;gap:.5rem;margin-top:.3rem}.control-button-field{margin:-.25rem}.settings-dialog{display:contents}.settings-dialog-header,.settings-mode-tabs{display:none}.status-bar-row2{display:contents}.status-bar{display:none}.status-chip,.hamburger-btn{border:1px solid var(--panel-border);background:var(--bg);color:var(--text);cursor:pointer;border-radius:999px;transition:filter .15s}.status-chip:hover,.hamburger-btn:hover{filter:brightness(1.2)}.status-chip.is-highlighted,.hamburger-btn.is-highlighted{box-shadow:0 0 0 1px var(--accent);animation:2s ease-in-out infinite highlight-glow}.btn{border:1px solid var(--panel-border);background:var(--bg);min-width:84px;color:var(--text);cursor:pointer;white-space:nowrap;border-radius:8px;flex:1;justify-content:center;align-items:center;gap:.35rem;padding:.5rem .8rem;font-size:.85rem;transition:filter .15s;display:inline-flex}.btn-icon{flex-shrink:0;width:14px;height:14px;display:inline-flex}.btn-icon svg{width:100%;height:100%}.btn:hover{filter:brightness(1.2)}.btn:disabled{opacity:.4;cursor:not-allowed}.btn-primary{background:var(--accent-dim);border-color:var(--accent);color:var(--accent)}.btn-danger{color:var(--danger)}.control-field.is-hidden{display:none}.control-field.is-disabled{opacity:.45}.control-field.is-highlighted{background:var(--accent-dim);box-shadow:0 0 0 1px var(--accent);animation:2s ease-in-out infinite highlight-glow}@keyframes highlight-glow{0%,to{box-shadow:0 0 0 1px var(--accent)}50%{box-shadow:0 0 12px 3px var(--accent)}}.segmented-group{background:var(--bg);border:1px solid var(--panel-border);border-radius:999px;gap:.25rem;padding:.2rem;display:flex}.segmented-option{color:var(--text-dim);cursor:pointer;background:0 0;border:none;border-radius:999px;flex:1;padding:.4rem .6rem;font-size:.85rem;transition:background .15s,color .15s}.segmented-option:disabled{opacity:.5;cursor:not-allowed}.segmented-option.active{background:var(--accent-dim);color:var(--accent)}.track-card-row{align-items:center;gap:.6rem;display:flex}.track-card-slider{accent-color:var(--accent);flex:1}.track-card-value{text-align:right;font-variant-numeric:tabular-nums;min-width:2.2em;font-size:.85rem}.btn-play{border-radius:999px;flex:none;width:2rem;min-width:2rem;height:2rem;padding:0}.btn-play svg{width:12px;height:12px}.btn-play.is-playing{background:var(--accent-dim);border-color:var(--accent);color:var(--accent)}@media (width<=760px){.lesson-panel{flex-direction:column;min-height:0;max-height:20dvh;margin:.5rem .75rem 0;padding:.6rem .75rem;display:flex}.lesson-nav .btn{padding:.25rem .9rem}.settings-dialog{background:var(--panel);border:none;border-top:1px solid var(--panel-border);width:100%;max-width:none;max-height:80dvh;padding:.85rem 1rem calc(.85rem + env(safe-area-inset-bottom));color:var(--text);border-radius:16px 16px 0 0;margin:0;display:none;position:fixed;inset:auto 0 0}.settings-dialog[open]{flex-direction:column;gap:.7rem;display:flex;overflow-y:auto}.settings-dialog::backdrop{background:#00000080}.settings-dialog-header{justify-content:space-between;align-items:center;display:flex}.settings-dialog-title{font-size:.95rem;font-weight:600}.settings-dialog-close{min-width:44px;min-height:44px;color:var(--text-dim);cursor:pointer;background:0 0;border:none;justify-content:center;align-items:center;font-size:1rem;display:inline-flex}.settings-mode-tabs{border-top:1px solid var(--panel-border);padding-top:.6rem;display:block}.settings-mode-tabs .mode-tabs{width:100%}.settings-mode-tabs .mode-tabs button{flex:1}#controls-panel{padding:.5rem .75rem calc(.5rem + env(safe-area-inset-bottom))}.controls-form{gap:.5rem}.status-bar-row2{order:2;display:flex}.control-field{width:100%}.status-bar{order:1;align-items:center;gap:.5rem;display:flex}.status-chip{text-align:left;flex:1;min-height:36px;padding:.35rem .6rem;font-size:.78rem}.hamburger-btn{flex:none;justify-content:center;align-items:center;width:36px;height:36px;padding:0;display:inline-flex}.hamburger-btn svg{width:14px;height:14px}.control-actions{order:3;grid-template-columns:repeat(3,1fr);display:grid}.control-actions .btn{min-height:44px;padding:.65rem .5rem}}.viz-header h2{margin:0 0 .2rem;font-size:1rem}.viz-desc{color:var(--text-dim);max-width:60ch;margin:0 0 1rem;font-size:.82rem}.viz-note{color:var(--text-dim);margin-bottom:.75rem;font-size:.8rem}#viz-panel.hide-viz-chrome .viz-header,#viz-panel.hide-viz-chrome .viz-note{display:none}.column-history-trials{flex-direction:column;gap:1.25rem;padding-bottom:.5rem;display:flex;overflow-x:auto}.deck-grid-wrap{transform-origin:0 0;display:inline-block}.deck-grid-stage{transform-origin:0 0;line-height:0;display:inline-block;position:relative}.anim-overlay{pointer-events:none;position:absolute;inset:0}.anim-card{will-change:transform;border-radius:1px;position:absolute;top:0;left:0}.grid-icon-row{position:absolute;top:0;left:0}.grid-icon-cell{color:var(--text-dim);justify-content:center;align-items:center;display:flex;position:absolute;top:2px}.grid-icon-cell svg{width:100%;height:100%}.follow-card-scroll{padding-bottom:.5rem;overflow-x:auto}@media (width<=760px){#viz-panel{flex-direction:column;display:flex;overflow:hidden}.viz-header,.viz-note{flex:none}.column-history-trials,.follow-card-scroll{flex:1;min-height:0;overflow-y:hidden}}