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var(--border);background:#ffffff0a;color:var(--muted);cursor:pointer;font:.68rem Space Mono,monospace}.tutorial-dot.complete{color:var(--ok);border-color:#39ff8759;background:#39ff8714}.tutorial-dot.next{color:var(--accent);border-color:var(--accent)}.tutorial-dot.latest{box-shadow:var(--glow2);border-color:var(--accent2);color:var(--accent2)}.tutorial-dot.active{box-shadow:var(--glow);border-color:var(--accent);color:#fff;transform:translateY(-1px)}.result-modal{border-color:#ffffff14}.result-modal.win{border-color:#39ff8761;box-shadow:0 0 28px #39ff8714}.result-modal.loss{border-color:#ff454561;box-shadow:0 0 28px #ff454514}.result-modal .big-emoji{font-family:Syne,sans-serif;font-size:2.1rem;font-weight:800;text-align:center;margin-bottom:6px;letter-spacing:.5px}.result-modal.win .big-emoji{color:var(--ok);text-shadow:0 0 18px rgba(57,255,135,.25)}.result-modal.loss .big-emoji{color:var(--err);text-shadow:0 0 18px rgba(255,69,69,.24)}.result-modal .result-title{font-family:Syne,sans-serif;font-size:1.4rem;font-weight:800;text-align:center;margin-bottom:10px}.result-modal .answer-box{background:#00ffe00d;border:1px solid rgba(0,255,224,.2);border-radius:8px;padding:10px 14px;font-size:.82rem;font-family:Space Mono,monospace;color:var(--accent);margin:10px 0;word-break:break-all}.stats-row{display:flex;gap:10px;justify-content:center;margin:14px 0}.stat-box{flex:1;background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:10px;text-align:center}.stat-box .val{font-family:Syne,sans-serif;font-size:1.7rem;font-weight:800;color:var(--accent)}.stat-box .lbl{font-size:.62rem;color:var(--muted);margin-top:2px;letter-spacing:1px}.share-btn{width:100%;padding:11px;border-radius:10px;border:none;cursor:pointer;font-family:Syne,sans-serif;font-weight:700;font-size:.88rem;background:linear-gradient(135deg,var(--accent2),#aa00ff);color:#fff;letter-spacing:1px;margin-top:8px;transition:opacity .2s}.share-btn:hover{opacity:.9}.site-footer{display:flex;justify-content:center;align-items:center;gap:10px;flex-wrap:wrap;margin:28px 0 10px;padding-top:14px;border-top:1px solid rgba(255,255,255,.07);color:var(--muted);font-size:.68rem}.site-footer a{color:var(--muted);text-decoration:none}.site-footer a:hover{color:var(--accent)}#toast-container{position:fixed;top:18px;left:50%;transform:translate(-50%);z-index:200;display:flex;flex-direction:column;gap:6px;align-items:center;pointer-events:none}.toast{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:7px 16px;font-size:.78rem;color:var(--text);box-shadow:0 4px 20px #0006;animation:toastIn .3s ease both;white-space:nowrap}.toast.good{border-color:var(--ok);color:var(--ok)}.toast.bad{border-color:var(--err);color:var(--err)}.toast.info{border-color:var(--accent);color:var(--accent)}#confetti-canvas{position:fixed;top:0;right:0;bottom:0;left:0;pointer-events:none;z-index:150}@keyframes fadeUp{0%{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}@keyframes slideIn{0%{opacity:0;transform:translate(-8px)}to{opacity:1;transform:translate(0)}}@keyframes toastIn{0%{opacity:0;transform:translateY(-8px) scale(.95)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes shake{0%,to{transform:translate(0)}20%,60%{transform:translate(-5px)}40%,80%{transform:translate(5px)}}@keyframes graphReveal{0%{opacity:0;transform:scaleY(.75)}to{opacity:1;transform:scaleY(1)}}.shaking{animation:shake .4s ease}@media (max-width:600px){.logo{font-size:1.4rem}.graph-row{flex-direction:column}.graph-arrow{transform:rotate(90deg);min-height:30px}.graph-tools{display:flex;align-items:flex-start;flex-direction:column}.graph-tools .guess-panel{flex-wrap:wrap}.active-guess-main{grid-template-columns:1fr}.active-guess-label,.active-guess-error{white-space:normal}.audit-summary,.audit-row{grid-template-columns:1fr 1fr}.audit-head{display:none}.profile-row{flex-direction:column}.stats-row{flex-wrap:wrap}.stat-box{min-width:42%}}@media (max-width:600px){#app.mobile-layout-v2{padding:10px}#app.mobile-layout-v2 header{padding:10px 0 12px;margin-bottom:12px;gap:8px;flex-wrap:wrap}#app.mobile-layout-v2 .logo{flex:0 0 auto}#app.mobile-layout-v2 .header-right{gap:6px;flex:0 1 auto;justify-content:flex-end;flex-wrap:wrap;margin-left:auto}#app.mobile-layout-v2 .streak-badge{padding:5px 9px}#app.mobile-layout-v2 .icon-btn{width:32px;height:32px}#app.mobile-layout-v2 .diff-row{margin-bottom:10px}#app.mobile-layout-v2 .mode-row{margin-bottom:12px}#app.mobile-layout-v2 .graph-section{display:flex;flex-direction:column;gap:6px}#app.mobile-layout-v2 .graph-label-row,#app.mobile-layout-v2 .graph-row,#app.mobile-layout-v2 .graph-right,#app.mobile-layout-v2 .graph-tools{display:contents}#app.mobile-layout-v2 .graph-label{flex:none;width:100%;font-size:.58rem;letter-spacing:1.5px;margin-top:2px}#app.mobile-layout-v2 #labelA{order:1}#app.mobile-layout-v2 #wrapA{order:2}#app.mobile-layout-v2 #baseGuessTabs{order:3}#app.mobile-layout-v2 .graph-arrow{order:4}#app.mobile-layout-v2 #labelB{order:5}#app.mobile-layout-v2 #wrapB{order:6}#app.mobile-layout-v2 #guessTabs{order:7}#app.mobile-layout-v2 .active-guess-strip{order:8}#app.mobile-layout-v2 .graph-wrap{flex:none;width:100%}#app.mobile-layout-v2 .graph-wrap canvas{height:174px!important}#app.mobile-layout-v2 .graph-arrow{min-height:20px;width:24px;height:24px;align-self:center;padding:0;font-size:1rem}#app.mobile-layout-v2 .graph-tools .guess-panel{width:100%;justify-content:center;gap:4px}#app.mobile-layout-v2 .guess-tab{min-width:34px;height:30px;padding:0 7px;border-radius:7px;font-size:.64rem}#app.mobile-layout-v2 #baseGuessTabs .guess-tab:first-child,#app.mobile-layout-v2 #guessTabs .guess-tab:first-child{min-width:52px}#app.mobile-layout-v2 .active-guess-strip{margin-top:8px;padding:8px 9px;gap:6px}#app.mobile-layout-v2 .active-guess-main{grid-template-columns:1fr;gap:4px}#app.mobile-layout-v2 .active-guess-expr{white-space:normal;overflow-wrap:anywhere}#app.mobile-layout-v2 .solution-reveal-head{align-items:center;gap:8px}#app.mobile-layout-v2 .solution-summary-row{grid-template-columns:repeat(3,minmax(0,1fr));gap:5px}#app.mobile-layout-v2 .solution-summary-row div{padding:6px}#app.mobile-layout-v2 .solution-summary-row span{font-size:.82rem}#app.mobile-layout-v2 .solution-copy-btn{padding:6px 9px}#app.mobile-layout-v2 .input-section{margin-top:12px}#app.mobile-layout-v2 .chip-groups{gap:5px}#app.mobile-layout-v2 .chip-row{gap:4px}#app.mobile-layout-v2 .chip{padding:4px 7px}#app.mobile-layout-v2 .input-row{flex-direction:column}#app.mobile-layout-v2 #submit-btn{width:100%}#app.mobile-layout-v2 .button-row{gap:6px}#app.mobile-layout-v2 #math-transform{min-width:100%;order:3}#app.mobile-layout-v2 #math-resolve-btn{order:4;flex:1}#app.mobile-layout-v2 #undo-btn,#app.mobile-layout-v2 #clear-btn{flex:1}#app.mobile-layout-v2 #feedback-btn{flex:1 1 100%}#app.mobile-layout-v2 .history-section{margin-top:14px}}