/* Mobile first polish: large touch targets, quiet account tools, focused practice. */
:root{--ink:#242344;--muted:#74738d;--purple:#6853dd;--line:#e8e7f1;--shadow:0 8px 32px #35225b08}
body{background:#f7f7fc;color:var(--ink);font-family:"Trebuchet MS",system-ui,sans-serif;font-size:16px;-webkit-tap-highlight-color:transparent}
button,summary,input,select{touch-action:manipulation}button{min-height:44px;border-radius:13px}button:hover{transform:none}button:active{transform:scale(.98)}.primary{background:#6853dd;box-shadow:0 4px 0 #4d39b9}.secondary{background:#eeebfc;color:#5e49c7}.soft{background:#f3f2f8;color:#626078}.danger{background:#fff0ef;color:#a33c3c}.tiny{font-size:.82rem;padding:10px 13px}.muted,.small,.subtext{color:#74738d}.row{gap:10px}
.app{width:100%;max-width:1020px;margin:0 auto;padding:16px}.account-bar{padding:0 0 14px;border:0;border-bottom:1px solid var(--line);border-radius:0;margin:0 0 18px;background:transparent;flex-wrap:nowrap;gap:10px}.account-meta{display:flex;gap:8px;align-items:center;min-width:0}.account-meta>div{min-width:0}.account-meta strong{font-size:.72rem;font-weight:700;display:block;overflow:hidden;text-overflow:ellipsis;max-width:240px;white-space:nowrap}.account-meta small{font-size:.66rem;margin-top:3px;line-height:1.4}.online-dot{width:6px;height:6px;border-radius:50%;background:#42a37d;flex-shrink:0}.data-menu{position:relative;flex-shrink:0}.data-menu summary{display:flex;align-items:center;gap:12px;min-height:44px;padding:8px 12px;color:#625d7a;font-size:.8rem;font-weight:700;cursor:pointer;list-style:none;border-radius:12px}.data-menu summary::-webkit-details-marker{display:none}.data-menu[open] summary{background:#eeebfc}.data-menu-panel{position:absolute;right:0;top:48px;z-index:20;width:250px;padding:14px;background:white;border:1px solid var(--line);border-radius:18px;box-shadow:0 15px 50px #29204426;display:grid;gap:8px}.data-menu-panel p{font-size:.75rem;color:var(--muted);margin:0 0 4px}.data-menu-panel button{width:100%;text-align:left;font-size:.85rem}.data-menu-panel hr{border:0;border-top:1px solid var(--line);width:100%;margin:4px 0}
.topbar{display:block;margin-bottom:18px}.brand{gap:10px;margin-bottom:18px}.logo{width:60px;height:60px}.brand h1{font-size:1.35rem;letter-spacing:-.5px}.brand p{font-size:.76rem;max-width:none;color:#858198;margin-top:4px}.top-actions{background:#fff;display:flex;align-items:center;justify-content:space-between;border:1px solid var(--line);border-radius:18px;padding:10px 12px;width:100%;gap:8px;flex-wrap:nowrap}.profile-pill{border:0;background:none;padding:0;gap:10px;min-width:0;border-radius:0}.profile-pill>div{min-width:0}.profile-pill small{display:block;font-size:.66rem;font-weight:500;color:var(--muted);margin-bottom:3px}.profile-pill strong{display:block;font-size:.9rem;max-width:180px;text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.profile-avatar{display:grid;place-items:center;width:38px;height:38px;background:#f1edff;border-radius:12px;color:#745cdb;font-size:25px;flex-shrink:0}.top-actions button{flex-shrink:0;font-size:.72rem;min-height:40px}
main{gap:18px}.hero{border-radius:22px;padding:23px 20px;min-height:188px;background:#6954db;box-shadow:none;align-items:center;overflow:hidden}.hero>div:first-child{max-width:75%}.eyebrow{font-size:.55rem;letter-spacing:1.1px;font-weight:800;display:block;color:#ddd5ff;line-height:1.5}.hero h2{font-size:1.7rem;line-height:1.18;letter-spacing:-.6px;margin:11px 0 10px}.hero p{font-size:.76rem;line-height:1.65;color:#e5ddff;margin:0}.hero-art{position:absolute;width:90px;height:150px;right:12px;top:23px}.math-tile{display:grid;place-items:center;position:absolute;font-size:38px;font-weight:800;width:54px;height:54px;border-radius:17px;box-shadow:0 5px 0 #3e2b852a}.tile-plus{background:#ffe09d;color:#9b6313;right:9px;top:5px;transform:rotate(12deg)}.tile-times{background:#d1c6ff;color:#6a4fd8;right:40px;top:66px;transform:rotate(-12deg)}.tile-divide{background:#d6f5e7;color:#318963;right:-4px;top:107px;transform:rotate(8deg);width:42px;height:42px;font-size:30px}.hero-star{position:absolute;right:65px;top:15px;font-size:18px;color:#cabcff}
.journey-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px}.journey-stats>div{background:#fff;border:1px solid var(--line);border-radius:16px;padding:13px 8px;display:grid;grid-template-columns:auto auto;justify-content:center;align-items:center;column-gap:7px;row-gap:5px}.journey-stats span{color:#9c85df;font-size:18px}.journey-stats strong{font-size:1.3rem}.journey-stats small{grid-column:1/-1;text-align:center;color:var(--muted);font-size:.64rem}
.panel{padding:20px 16px;background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:none}.panel h2{font-size:1.25rem;letter-spacing:-.4px;line-height:1.3}.section-title{margin-bottom:16px}.section-title h2{margin:7px 0 6px}.section-title .small{font-size:.76rem;line-height:1.5}.section-eyebrow{color:#8e80b6;letter-spacing:1.2px}.grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.material{min-height:152px;border:1px solid var(--mat-border);border-radius:18px;padding:14px 12px;grid-template-columns:1fr 30px;grid-template-rows:46px auto auto;gap:7px;text-align:left;box-shadow:0 3px 0 #2c224b04}.material .emoji{width:38px;height:38px;grid-column:1;grid-row:1;align-self:center}.material .emoji svg{width:38px;height:38px;filter:none}.material span.material-arrow{grid-column:2;grid-row:1;width:27px;height:27px;font-size:20px;justify-self:end;align-self:start}.material strong{grid-column:1/-1;grid-row:2;font-size:.9rem;align-self:end;line-height:1.3}.material span.material-desc{grid-column:1/-1;grid-row:3;font-size:.66rem;line-height:1.45;color:#777188;align-self:start}.material:nth-child(5){min-height:106px;grid-template-columns:54px minmax(0,1fr) 28px;grid-template-rows:auto auto;padding:15px}.material:nth-child(5) .emoji,.material:nth-child(5) .emoji svg{width:46px;height:46px}.material:nth-child(5) .emoji{grid-column:1;grid-row:1/span 2}.material:nth-child(5) strong{grid-column:2;grid-row:1}.material:nth-child(5) span.material-desc{grid-column:2;grid-row:2}.material:nth-child(5) span.material-arrow{grid-column:3;grid-row:1/span 2;align-self:center}
.levels{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:18px}.level{min-height:120px;border-radius:16px;padding:15px 12px;text-align:left;border:1px solid #e7e3f5;gap:9px}.level span:first-child{font-size:.9rem}.level strong{font-size:.8rem}.level .status{font-size:.65rem}.level.locked{background:#f7f7fb;opacity:.65}.rounds{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:18px}.round{border-radius:16px;min-height:108px;padding:14px 10px;text-align:left}.round strong{font-size:.9rem}.round small{font-size:.68rem;line-height:1.7}.badge{font-size:.72rem;border-radius:9px;padding:7px 10px}.panel>.row.between{align-items:flex-start;gap:14px;flex-wrap:wrap}.panel>.row.between>.row{gap:6px}.panel>.row.between>.row button{font-size:.7rem;padding:8px 12px}.panel>.row.between .small{font-size:.74rem;line-height:1.5}#roundPanel>.row:last-child{display:grid;gap:12px}#startRoundBtn{width:100%;font-size:.95rem;min-height:50px}
.app[data-view=practicePanel] .topbar,.app[data-view=practicePanel] .hero,.app[data-view=practicePanel] #journeyStats,.app[data-view=practicePanel] #recordsPanel,.app[data-view=summaryPanel] .hero,.app[data-view=summaryPanel] #journeyStats{display:none}.app:not([data-view=homePanel]) #journeyStats,.app:not([data-view=homePanel]) .hero{display:none}.practice-head{align-items:flex-start;gap:12px;margin-bottom:24px}.practice-head .badge{font-size:.65rem}.practice-head .small{font-size:.67rem;margin-top:8px}.practice-head button{font-size:.65rem;min-height:40px;padding:9px 11px}.progress-track{height:8px;border-radius:8px;margin:9px 0 20px;background:#f0edf8}.progress-fill{background:#8a76e8;border-radius:8px;transition:width .2s}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.stat{border:0;border-radius:14px;background:#f7f6fc;padding:13px 5px;text-align:center;min-width:0}.stat span{font-size:.64rem;color:var(--muted)}.stat strong{font-size:1.35rem;color:#55429b;margin-top:6px}.question-box{border:0;background:#fff;padding:28px 0 4px;margin-top:6px}.question-label{font-size:.7rem;letter-spacing:1px;text-transform:uppercase;color:#8b83a3}.question{font-size:clamp(1.8rem,7.8vw,3.4rem);line-height:1.35;margin:20px 0 26px;overflow-wrap:anywhere;letter-spacing:-1px}.answer-row{display:grid;grid-template-columns:minmax(0,1fr) 90px;gap:10px}.answer-row input{min-width:0;width:100%;border:2px solid #ddd6f5;border-radius:14px;height:56px;padding:12px;font-size:1.2rem;text-align:center;background:#faf9ff;color:#30234e}.answer-row input:focus{outline:3px solid #e9e3ff;border-color:#957ce4}.answer-row input::placeholder{font-size:.9rem;letter-spacing:0;color:#aaa2b8}.answer-row button{font-size:1rem;padding:12px}.feedback{min-height:28px;font-size:.9rem;margin-top:16px}#hint{font-size:.7rem;line-height:1.6;margin-top:6px;color:#91899e}#practicePanel .row.small{font-size:.72rem;color:#81798e}#recordsPanel h2{font-size:1.05rem}#recordsPanel .small{font-size:.68rem}#recordsPanel .empty{font-size:.77rem;padding:22px 12px;line-height:1.7;border:1px dashed #e6e0ef;border-radius:14px;margin-top:16px;background:#fcfbfe}.foot{font-size:.65rem;line-height:1.6;margin:20px 0 8px;color:#9b94a7}.record-table th,.record-table td{white-space:nowrap;padding:10px 8px;font-size:.7rem}
.modal-backdrop{padding:18px;align-items:center;background:#27213b77;backdrop-filter:blur(4px)}.modal{position:relative;border-radius:24px;padding:24px;width:100%;max-width:440px;max-height:calc(100dvh - 40px);overflow-y:auto;overscroll-behavior:contain}.modal h2{font-size:1.3rem;padding-right:24px}.modal .subtext{font-size:.82rem;line-height:1.65}.modal label{font-size:.8rem;font-weight:700}.modal input,.modal select{min-height:48px;border-radius:12px;font-size:16px;width:100%;padding:12px;border:1px solid #ded9e9}.modal .row{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.modal .row button{flex:1;font-size:.8rem}.modal-close{position:absolute;right:14px;top:14px;font-size:24px;width:40px;min-height:40px;padding:4px}.modal #createProfile{width:100%;margin-top:12px;background:#6853dd;color:white}#summaryActions{display:grid;gap:10px}#summaryActions button{width:100%;font-size:.85rem}#summaryPanel .stat strong{font-size:1.05rem}#summaryPanel .stat span{font-size:.58rem}.toast{left:16px;right:16px;bottom:max(18px,env(safe-area-inset-bottom));transform:none;max-width:450px;margin:auto;border-radius:14px;padding:14px 18px;font-size:.8rem;line-height:1.5;z-index:100}
.account-locked{display:block;min-height:100dvh;background:#f5f3fd}.auth-gate{width:min(440px,calc(100% - 28px));margin:20px auto}.auth-card{padding:24px 20px;border-radius:24px;border:1px solid #ebe5f5;box-shadow:0 10px 40px #4d397008}.auth-brand{gap:10px;margin-bottom:20px}.auth-brand img{width:58px;height:58px}.auth-brand strong{font-size:1.25rem;letter-spacing:-.4px}.auth-brand p{font-size:.68rem;line-height:1.6}.auth-tabs{border-radius:13px;padding:4px;gap:4px}.auth-tabs button{font-size:.78rem;min-height:40px;border-radius:10px;padding:8px}.auth-card h2{font-size:1.45rem;letter-spacing:-.6px;margin:22px 0 8px}.auth-card>p{font-size:.8rem;line-height:1.6;margin:0 0 18px}.auth-card label{font-size:.76rem;margin:13px 0 6px}.auth-card input{height:46px;padding:11px 12px;border-radius:11px;font-size:16px;background:#fcfbff;border-color:#e2ddec}.auth-card input::placeholder{font-size:.78rem;color:#aaa2b5}.auth-card small{font-size:.63rem;margin-top:5px;line-height:1.5}.auth-submit{font-size:.86rem;min-height:48px;margin-top:20px}.password-field{position:relative}.password-field input{padding-right:65px}.password-field button{position:absolute;right:4px;top:3px;min-height:40px;padding:6px 10px;background:transparent;font-size:.68rem;color:#7a64c5}.auth-card .auth-error{margin:12px 0 0;min-height:0;color:#b43848;font-size:.75rem}.auth-error:empty{display:none}.auth-note{font-size:.69rem;line-height:1.7;margin:16px 20px;color:#8b819c}.auth-gate button:focus-visible,.data-menu summary:focus-visible{outline:3px solid #c5b4ed;outline-offset:2px}
@media(min-width:720px){.app{padding:24px 32px}.topbar{display:flex;justify-content:space-between;align-items:center;gap:24px}.brand{margin:0}.top-actions{width:auto;min-width:300px}.hero{padding:30px 32px;min-height:220px}.hero h2{font-size:2.3rem}.hero p{font-size:.9rem}.eyebrow{font-size:.65rem}.hero-art{right:70px;top:35px;transform:scale(1.3);transform-origin:top right}.hero>div:first-child{max-width:65%}.journey-stats>div{padding:17px 10px}.journey-stats small{font-size:.75rem}.panel{padding:26px}.grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.material:nth-child(5){grid-column:1/-1;min-height:90px}.material{min-height:166px}.material strong{font-size:1rem}.material span.material-desc{font-size:.74rem}.levels{grid-template-columns:repeat(5,minmax(0,1fr))}.rounds{grid-template-columns:repeat(4,minmax(0,1fr))}.question-box{max-width:560px;margin:16px auto}.app[data-view=practicePanel]{max-width:760px}.question{font-size:3.4rem}.auth-gate{margin:36px auto}.auth-card{padding:28px 30px}}
@media(max-width:350px){.app{padding:12px}.profile-pill strong{max-width:140px}.hero h2{font-size:1.5rem}.hero-art{right:2px;transform:scale(.85);transform-origin:right center}.hero>div:first-child{max-width:80%}.material{padding:12px 9px}.material strong{font-size:.8rem}.auth-card{padding:20px 16px}.auth-brand p{font-size:.6rem}.practice-head .badge{font-size:.59rem}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;animation:none!important;scroll-behavior:auto!important}}
.sound-toggle{background:#eeebfc;color:#7962cc;display:flex;align-items:center;justify-content:center;gap:6px;min-width:44px;padding:8px;font-size:22px;flex-shrink:0;border-radius:12px}.sound-toggle span{font-size:.58rem;max-width:35px;line-height:1.35;text-align:left}.sound-toggle[aria-pressed=true]{background:#e5f6ed;color:#32815f}.account-meta{flex:1}.account-meta strong{max-width:175px}.account-bar{gap:8px}.data-menu summary{padding:8px}.hero-art{width:100px}.number-buddy{position:absolute;right:0;top:30px;background:#ffdf87;width:78px;height:86px;border-radius:27px 27px 24px 24px;box-shadow:0 6px 0 #d3a44f;transform:rotate(8deg);z-index:2;animation:buddy-float 4s ease-in-out infinite}.buddy-eye{position:absolute;top:24px;background:#714c32;width:6px;height:9px;border-radius:50%}.eye-left{left:22px}.eye-right{right:22px}.buddy-cheek{position:absolute;top:35px;background:#f4b27b;width:12px;height:6px;border-radius:50%}.cheek-left{left:12px}.cheek-right{right:12px}.buddy-smile{position:absolute;top:35px;left:31px;width:16px;height:10px;border-bottom:3px solid #714c32;border-radius:50%}.buddy-number{position:absolute;bottom:6px;left:32px;font-size:21px;line-height:1;color:#bc8334;font-weight:800}.hero-art .tile-plus{right:61px;top:0;width:34px;height:34px;font-size:23px;background:#c5f4e4;color:#378d70;transform:rotate(-15deg)}.hero-art .tile-times{right:-2px;top:125px;width:34px;height:34px;font-size:24px;transform:rotate(15deg)}.hero-art .tile-divide{display:none}.hero-art .hero-star{right:3px;top:0}.hero h2{max-width:210px}.material{transition:transform .18s,box-shadow .18s}.material:active{transform:scale(.96);box-shadow:0 0 0 3px #bcb1e955}.material span.material-arrow{color:var(--mat-ink);line-height:1;margin:0}.feedback.good{background:#eaf8ee;border-radius:12px;color:#28805b;padding:10px;font-weight:800}.feedback.bad{background:#fff5df;border-radius:12px;color:#946819;padding:10px;font-weight:700}.feedback:empty{padding:0;background:none}.celebration{font-size:1.6rem;letter-spacing:6px;margin-bottom:14px;animation:reward-pop .6s ease-out both}.app[data-view=summaryPanel] #summaryPanel{background:linear-gradient(180deg,#fffaf0,#fff 180px)}#welcomeTitle{overflow-wrap:anywhere}.auth-card .primary{background:linear-gradient(100deg,#7359e6,#6751d6)}
@keyframes buddy-float{0%,100%{transform:translateY(0) rotate(8deg)}50%{transform:translateY(-7px) rotate(3deg)}}@keyframes reward-pop{0%{transform:translateY(10px) scale(.8);opacity:0}100%{transform:translateY(0) scale(1);opacity:1}}
@media(min-width:720px){.hero h2{max-width:400px}.account-meta strong{max-width:320px}.sound-toggle span{max-width:none;font-size:.72rem}.sound-toggle{padding:8px 12px}}
main,.panel,#recordsContent{min-width:0;max-width:100%}.panel{width:100%}#recordsContent{width:100%;overflow-x:auto}.row>div{min-width:0}.stat strong{overflow-wrap:anywhere}#summaryPanel .row.between{flex-wrap:nowrap}#summaryPanel>.row.between>div:first-child{flex:1}#summaryPanel .small{overflow-wrap:anywhere}