@font-face{font-family:Bravura;src:url('./assets/Bravura.otf') format('opentype');font-display:block}
:root{--paper:#f3f5f1;--white:#fff;--ink:#243832;--muted:#708078;--line:#dfe6df;--forest:#183d38;--green:#bfe1b2;--light:#e8f0e5;--lavender:#ede8f5;--purple:#65517c;--amber:#fff1ce;--red:#aa534a;--radius:18px;--shadow:0 5px 25px #1b3d3610;font-family:Inter,-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif;color:var(--ink);font-synthesis:none;background:var(--paper)}
*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a,input,select{touch-action:manipulation}button{cursor:pointer}button:disabled{opacity:.45;cursor:not-allowed}button,input,select,textarea{outline-offset:4px}button:focus-visible,a:focus-visible{outline:3px solid #739d68}a{color:inherit}button{color:inherit}svg{display:block;flex-shrink:0}button svg{width:20px;height:20px}input,select,textarea{border:1px solid var(--line);background:#fff;border-radius:10px;padding:12px 13px;min-height:44px;color:var(--ink);max-width:100%}input::placeholder{color:#8b9891}label{font-size:13px;color:#5d7066;display:block}label>input,label>select{display:block;width:100%;margin-top:8px}h1,h2,h3,p{margin:0}h1{font-size:clamp(27px,3vw,38px);letter-spacing:-1.2px;font-weight:550;line-height:1.18}h2{font-size:22px;font-weight:550;letter-spacing:-.5px}h3{font-size:16px;font-weight:560}p{line-height:1.6}.muted{color:var(--muted)}.eyebrow{font-size:10px;letter-spacing:1.8px;font-weight:650;text-transform:uppercase;color:var(--muted)}.small{font-size:12px;line-height:1.55}.hidden{display:none!important}.skip-link{position:fixed;top:-60px;left:15px;z-index:100;background:#fff;padding:12px}.skip-link:focus{top:12px}.loading{min-height:100vh;display:grid;place-content:center;gap:16px;text-align:center}.brand-symbol{font-size:40px;color:var(--forest)}
.layout{min-height:100vh;display:grid;grid-template-columns:224px minmax(0,1fr)}.sidebar{background:var(--forest);color:#e9f2eb;position:fixed;width:224px;inset:0 auto 0 0;display:flex;flex-direction:column;padding:32px 18px 22px;z-index:20}.brand{display:flex;align-items:center;gap:12px;padding:0 9px 34px}.brand img{width:36px;height:36px}.brand-name{font-size:19px;line-height:1.1;letter-spacing:-.4px}.brand-name span{display:block;font-size:9px;letter-spacing:3.6px;margin-top:7px;color:#b2c7bc}.nav{display:flex;flex-direction:column;gap:7px}.nav button{border:0;background:none;color:#adc3b7;display:flex;gap:12px;align-items:center;padding:13px 14px;border-radius:11px;text-align:left;font-size:13px}.nav button.active{background:#33574b;color:#e9f4e3}.nav button:hover{background:#2a4e44}.nav .count{margin-left:auto;font-size:10px;color:#bbd4b4;background:#ffffff0c;padding:4px 6px;border-radius:5px}.sidebar-bottom{margin-top:auto;padding:22px 13px 0;border-top:1px solid #ffffff1f}.sidebar-bottom .badge-line{display:flex;align-items:center;gap:7px;color:#cce3bd;font-size:11px}.status-dot{width:6px;height:6px;border-radius:50%;background:#bfdcaa;display:inline-block}.sidebar-bottom p{color:#9fb8aa;font-size:11px;margin-top:10px}.workspace{grid-column:2;min-width:0}.topbar{height:84px;display:flex;align-items:center;justify-content:space-between;padding:0 44px;border-bottom:1px solid var(--line);background:#f7f9f5;gap:15px}.top-context{font-size:11px;letter-spacing:1px;color:#7f8f83;display:flex;gap:14px;align-items:center}.top-context span:last-child{color:#354e40}.profile-tools{display:flex;gap:8px;align-items:center}.profile-select{max-width:180px;border:0;background:transparent;padding:8px 22px 8px 4px;font-size:13px}.avatar{height:33px;width:33px;border-radius:50%;background:#dfe8d9;display:grid;place-content:center;color:#4f654b;font-size:12px}.icon-btn{border:1px solid var(--line);background:#fff;display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:10px;flex-shrink:0}.lang-btn{border:0;background:none;font-size:11px;padding:8px;color:var(--muted)}.mobile-toggle{display:none}.main{max-width:1420px;margin:0 auto;padding:38px 44px 60px}.page-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:29px}.page-head .eyebrow{margin-bottom:12px}.page-head p{margin-top:12px;color:var(--muted);font-size:14px}.chip{display:inline-flex;gap:7px;align-items:center;padding:7px 10px;border-radius:7px;background:#e8ede5;font-size:11px;white-space:nowrap}.chip.purple{background:var(--lavender);color:var(--purple)}.chip.small-chip{padding:4px 8px;font-size:10px}.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px}.panel-title{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:20px}.section-head{display:flex;justify-content:space-between;align-items:center;margin:30px 0 16px}.section-head h2{font-size:17px}.step-label{display:flex;align-items:center;gap:10px;font-size:12px;margin-bottom:14px;color:#68786e}.step-number{width:22px;height:22px;border:1px solid #cfdbcb;display:grid;place-content:center;border-radius:50%;font-size:10px}
.levels{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:11px;margin-bottom:24px}.level-card{background:#fff;border:1px solid var(--line);border-radius:13px;position:relative;text-align:left;padding:18px 15px;min-height:128px;transition:background .18s,border .18s;display:flex;flex-direction:column;align-items:flex-start;gap:8px}.level-card:hover{border-color:#9cb599}.level-card.selected{background:#e3eddd;border-color:#7a9c70}.level-card .level-top{font-size:10px;text-transform:uppercase;letter-spacing:1px;color:#7f8e80}.level-number{font-size:30px;font-weight:450;line-height:1.05;letter-spacing:-1px}.level-card small{font-size:11px;color:#7b8a7b}.level-card.selected:after{content:'✓';position:absolute;right:11px;top:13px;color:#5b7e50;font-size:12px}.lesson-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:20px}.form-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:18px}.option-count{display:flex;gap:7px;margin-top:8px}.option-count button{background:#f8faf6;border:1px solid var(--line);border-radius:9px;height:44px;min-width:52px}.option-count button.selected{border-color:#6e8a60;background:var(--light)}.toggle-label{display:flex;align-items:center;gap:10px;margin:20px 0;color:#6e7f73;font-size:12px}.toggle-label input{width:17px;height:17px;min-height:auto;accent-color:#597f4f}.field-full{margin-top:17px}.actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.btn{border:1px solid var(--line);background:#fff;border-radius:10px;padding:12px 17px;min-height:44px;display:inline-flex;align-items:center;justify-content:center;gap:9px;font-size:13px;text-decoration:none;line-height:1.3}.btn.primary{background:var(--forest);border-color:var(--forest);color:#fff}.btn.primary:hover{background:#2b5144}.btn.soft{background:#e9f0e3;border-color:#dce6d6}.btn.ghost{background:transparent;border-color:transparent;color:#697d6c}.btn.danger{color:var(--red);border-color:#e8c7bf}.btn.full{width:100%}.btn.small-btn{padding:8px 12px;min-height:36px;font-size:12px}.arrow-right{margin-left:auto}.lesson-actions{margin-top:23px;display:flex;align-items:center;justify-content:space-between;gap:12px}.lesson-actions .btn.primary{min-width:208px}.plan-panel{background:#e8ede3;border-color:#dce4d5;overflow:hidden;position:relative}.plan-panel .eyebrow{font-size:9px}.plan-panel h3{font-size:21px;margin-top:10px}.plan-panel .topic-list{display:flex;flex-wrap:wrap;gap:7px;margin:16px 0}.topic-list span{font-size:10px;padding:5px 7px;background:#f7faf3;border-radius:5px;color:#6b7c62}.progress-line{height:5px;background:#d6dfcf;border-radius:8px;overflow:hidden}.progress-line i{height:100%;display:block;background:#648657;transition:width .3s}.plan-stats{display:flex;justify-content:space-between;align-items:flex-end;margin-top:22px;margin-bottom:10px}.plan-stats strong{font-size:30px;font-weight:450}.plan-stats span{font-size:11px;color:#728069}.staff-decoration{margin:22px -4px 0;opacity:.65}.quick-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.quick-card{background:#fff;border:1px solid var(--line);border-radius:13px;padding:19px;text-align:left;display:flex;gap:13px;align-items:flex-start}.quick-card:hover{border-color:#a4b79c}.quick-icon{height:38px;width:38px;display:grid;place-content:center;border-radius:10px;background:#e7eee1;flex-shrink:0}.quick-card:nth-child(2) .quick-icon{background:var(--lavender)}.quick-card:nth-child(3) .quick-icon{background:#f6eedb}.quick-card h3{font-size:13px;margin:3px 0 6px}.quick-card p{font-size:11px;color:var(--muted)}.footnote{font-size:11px;color:#7f8f80;margin-top:24px;display:flex;gap:8px;align-items:center;flex-wrap:wrap}.text-link{border:0;background:none;text-decoration:underline;text-underline-offset:3px;font-size:inherit;color:inherit;padding:0}.resume{display:flex;align-items:center;justify-content:space-between;background:#f5f0dd;border:1px solid #e9dfc1;padding:15px 18px;border-radius:12px;gap:15px;margin-bottom:20px}.resume p{font-size:12px}
.filters{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:22px}.filters .search{flex:1;min-width:180px}.filters select{font-size:12px;min-width:140px}.filters .toggle-label{margin:0}.question-list{display:flex;flex-direction:column;gap:8px}.question-row{display:grid;grid-template-columns:68px minmax(0,1fr) 100px 20px;gap:15px;align-items:center;text-align:left;border:1px solid var(--line);background:white;padding:17px 19px;border-radius:11px}.question-row:hover{border-color:#a0b39b}.qid{font-size:10px;color:#7a887e;letter-spacing:.5px}.row-title{font-size:13px;line-height:1.5}.row-sub{font-size:10px;color:#8b968e;margin-top:5px}.status-pill{font-size:10px;border-radius:5px;padding:5px 8px;display:inline-flex;align-items:center;gap:5px;background:#f0f3ee;color:#849081}.status-pill.good{background:#e7f2df;color:#4c7343}.status-pill.help{background:#fff1d0;color:#927224}.status-pill.bad{background:#f9e8e2;color:#9a5548}.empty{padding:60px 20px;text-align:center;background:#fff;border:1px dashed #cedaca;border-radius:16px}.empty svg{margin:0 auto 18px;color:#9aaa97}.empty h3{margin-bottom:10px}.empty p{color:var(--muted);font-size:13px;max-width:440px;margin:auto}.empty .btn{margin-top:22px}
.session-top{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:17px}.session-top .actions{flex-wrap:nowrap}.session-track{display:flex;gap:5px;flex-wrap:wrap}.session-track span{width:22px;height:4px;background:#dce5d7;border-radius:4px}.session-track span.current{background:#425f3f}.session-track span.done{background:#97be85}.session-card{max-width:910px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:21px;overflow:hidden;box-shadow:var(--shadow)}.question-body{padding:35px 38px 29px}.question-meta{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:24px}.question-body h2{font-size:clamp(23px,3vw,34px);line-height:1.4;letter-spacing:-.7px;max-width:750px;font-weight:500}.piece-hint{font-size:12px;color:#798675;display:flex;align-items:center;gap:8px;margin-top:18px}.score-surface{margin-top:24px;background:#fafbf8;border:1px solid #edf1e9;border-radius:13px;padding:18px;overflow:hidden}.score-surface svg{width:100%;height:auto;max-height:260px}.score-surface .music-text{font-family:Bravura;font-size:48px}.sound-surface{display:flex;gap:17px;align-items:center;background:#edf2e7;border-radius:13px;padding:18px 20px;margin-top:22px}.play-round{width:52px;height:52px;border-radius:50%;background:#fff;border:1px solid #d4dfcd;display:grid;place-content:center;flex-shrink:0}.sound-surface h3{font-size:14px;margin-bottom:5px}.sound-surface p{font-size:11px;color:#7a8973}.wave-bars{display:flex;align-items:center;gap:3px;height:28px;flex:1;justify-content:center}.wave-bars i{width:3px;height:var(--h,12px);background:#9bad8f;border-radius:3px}.playing .wave-bars i{animation:wave 650ms ease-in-out infinite alternate;animation-delay:var(--d,0ms)}@keyframes wave{to{height:5px}}.reveal-area{border-top:1px solid var(--line);background:#f9fbf6;padding:22px 38px;display:flex;align-items:center;justify-content:space-between;gap:14px}.hint-text{font-size:11px;color:#879280}.answer-block{padding:26px 38px;border-top:1px solid #dde6d6;background:#f0f6e9}.answer-block .eyebrow{color:#72876a;margin-bottom:10px}.answer-block p{font-size:15px;line-height:1.65}.answer-example{margin-top:17px;padding-top:17px;border-top:1px solid #d9e4cf}.teacher-note{background:#fff;border-radius:10px;padding:15px 17px;margin-top:19px;color:#66775d;font-size:12px;line-height:1.6}.answer-figure{width:100%;height:auto;display:block;margin-top:16px;border-radius:8px;background:white}.assessment{padding:23px 38px;background:#fff;border-top:1px solid var(--line)}.assessment .eyebrow{margin-bottom:12px}.grade-row{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}.grade{border:1px solid var(--line);border-radius:10px;background:#fff;min-height:49px;font-size:12px;display:flex;align-items:center;justify-content:center;gap:8px}.grade.good{background:#eaf3e2;border-color:#d2e3c6;color:#567747}.grade.help{background:#fff4d8;border-color:#efdfb7;color:#8d712f}.grade.bad{background:#fbeee7;border-color:#eed6cb;color:#a26952}.grade.selected{box-shadow:inset 0 0 0 2px currentColor}.session-footer{max-width:910px;margin:18px auto;display:flex;justify-content:space-between;gap:10px;align-items:center}.session-footer p{font-size:11px;color:var(--muted)}.session-results{text-align:center;padding:42px 28px}.result-number{font-size:70px;color:#507c47;letter-spacing:-3px;line-height:1.2;margin:24px 0 6px}.result-number small{font-size:26px;color:#97a18e;letter-spacing:0}.result-grid{display:flex;justify-content:center;gap:32px;margin:25px 0 30px}.result-grid div span{display:block;font-size:25px;margin-bottom:6px}.result-grid small{font-size:11px;color:#839179}.result-detail{margin:25px 0;text-align:left}.result-detail .question-row{margin-bottom:7px}.presentation .sidebar,.presentation .topbar,.presentation .teacher-only{display:none!important}.presentation .workspace{grid-column:1/-1}.presentation .main{padding:25px 28px}.presentation .student-head{display:flex}.student-head{display:none;justify-content:space-between;align-items:center;margin-bottom:24px;font-size:12px;color:var(--muted)}.presentation .question-body{padding:48px}.presentation .question-body h2{font-size:clamp(27px,4vw,43px)}.timer{font-variant-numeric:tabular-nums;font-size:13px;color:#67715e}.exam-score{display:flex;gap:7px;flex-wrap:wrap}.exam-score button{min-width:36px;height:39px;border:1px solid var(--line);background:#fff;border-radius:8px}.exam-score button.selected{background:var(--light);border-color:#708964}
.drill-tabs{display:flex;gap:7px;flex-wrap:wrap;margin:0 0 23px}.drill-tabs button{border:1px solid var(--line);background:#fff;border-radius:9px;padding:10px 13px;font-size:12px}.drill-tabs button.active{background:var(--forest);border-color:var(--forest);color:#fff}.drill-layout{display:grid;grid-template-columns:minmax(0,1fr) 230px;gap:20px}.drill-card{padding:30px;text-align:center;min-height:440px}.drill-card .eyebrow{margin-bottom:17px}.drill-card h2{font-size:25px;line-height:1.4}.drill-card .sound-surface{margin:24px 0;text-align:left}.options-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-top:24px}.answer-option{background:#fff;border:1px solid var(--line);border-radius:9px;padding:13px 10px;min-height:49px;font-size:13px}.answer-option:hover{background:#f3f6ef}.answer-option.correct{background:#e4f0da;border-color:#82aa70;color:#436637}.answer-option.wrong{background:#fae7df;border-color:#ce9382;color:#965345}.answer-option:disabled{opacity:.82}.feedback{margin:20px 0 5px;border-radius:10px;padding:14px;font-size:13px;text-align:left;background:#e7f2df;line-height:1.5}.feedback.wrong{background:#faeee5;color:#936549}.drill-card .btn.next{margin-top:20px}.drill-side .panel{padding:20px;margin-bottom:15px}.drill-side .big{font-size:32px;margin:12px 0 4px}.drill-side label{margin-top:20px}.drill-side input[type=range]{padding:0;min-height:25px;accent-color:#729264}.drill-side .muted{font-size:11px;line-height:1.7}.keyboard{height:110px;display:flex;position:relative;margin:20px auto 2px;max-width:580px;user-select:none;touch-action:none}.key{border:1px solid #bdc9b9;background:#fff;border-radius:0 0 5px 5px;flex:1;position:relative;padding:0;color:#86927d;font-size:10px;display:flex;align-items:flex-end;justify-content:center;padding-bottom:9px}.key.black{position:absolute;z-index:2;top:0;height:64%;width:4.5%;background:#283a33;color:#cbd7c5;border-color:#283a33;border-radius:0 0 4px 4px}.key:active,.key.pressed{background:#c1dbb1}.key.black:active,.key.black.pressed{background:#79946b}.piano-disclosure{margin-top:23px}.piano-disclosure summary{cursor:pointer;font-size:12px;color:var(--muted)}
.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px;margin-bottom:23px}.stat{padding:23px;background:#fff;border:1px solid var(--line);border-radius:14px}.stat p{font-size:11px;color:var(--muted)}.stat .big{font-size:36px;letter-spacing:-1px;margin-top:10px}.progress-table{width:100%;border-collapse:collapse;font-size:12px}.progress-table td,.progress-table th{padding:15px 7px;text-align:left;border-bottom:1px solid var(--line);font-weight:400}.progress-table th{font-size:10px;color:var(--muted)}.progress-table .progress-line{min-width:70px}.history{display:flex;flex-direction:column;gap:9px}.history-row{display:flex;align-items:center;justify-content:space-between;border:1px solid var(--line);border-radius:10px;padding:14px 16px;background:#fff;gap:12px;font-size:12px}.history-row small{display:block;color:var(--muted);font-size:10px;margin-top:5px}.reference-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.reference-grid .panel{overflow:auto}.ref-table{font-size:12px;width:100%;border-collapse:collapse;margin-top:15px}.ref-table td,.ref-table th{padding:10px 5px;text-align:left;border-bottom:1px solid var(--line);font-weight:400;line-height:1.5}.ref-table th{color:var(--muted);font-size:10px}.reference-grid .wide{grid-column:1/-1}.source-item{padding:15px 0;border-bottom:1px solid var(--line)}.source-item:last-child{border:0}.source-item p{font-size:12px;color:var(--muted);margin:7px 0}.source-item h3{font-size:13px;word-break:break-word}.source-item a{font-size:11px;color:#597c4e}.legend{display:grid;gap:12px;margin-top:20px}.legend-item{display:flex;align-items:flex-start;gap:11px;font-size:12px;line-height:1.5}
.toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%,20px);background:#263f32;color:white;padding:13px 19px;border-radius:12px;z-index:100;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;font-size:13px;max-width:calc(100% - 30px);text-align:center}.toast.show{opacity:1;transform:translate(-50%,0)}dialog{border:1px solid var(--line);border-radius:20px;box-shadow:0 15px 80px #0a251f30;max-width:min(540px,calc(100vw - 30px));width:540px;padding:28px;color:var(--ink)}dialog::backdrop{background:#173f3655;backdrop-filter:blur(3px)}dialog h2{margin-bottom:13px}dialog p{font-size:13px;color:var(--muted);margin-bottom:20px}dialog label{margin:17px 0}dialog .actions{justify-content:flex-end;margin-top:23px}.modal-close{position:absolute;right:15px;top:15px;background:none;border:0;padding:6px}.danger-zone{border-top:1px solid var(--line);margin-top:24px;padding-top:20px}.drawer-backdrop{display:none}
@media(min-width:1450px){.main{padding-top:45px}.level-card{padding:20px;min-height:145px}.question-body h2{font-size:34px}}
@media(max-width:1150px){.main{padding:30px 26px 50px}.topbar{padding:0 26px}.layout{grid-template-columns:195px minmax(0,1fr)}.sidebar{width:195px;padding-left:12px;padding-right:12px}.brand-name{font-size:17px}.lesson-grid{grid-template-columns:minmax(0,1fr) 240px}.level-card{padding:15px 10px}.form-grid{grid-template-columns:1fr}.plan-panel{padding:21px}.quick-grid{gap:9px}.quick-card{padding:15px;gap:9px}.quick-icon{width:32px;height:32px}.drill-layout{grid-template-columns:minmax(0,1fr) 205px}.top-context{font-size:9px;gap:8px}}
@media(max-width:900px){.lesson-grid{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr 1fr}.plan-panel{display:none}.levels{gap:7px}.level-card{min-height:115px}.level-card small{font-size:9px}.quick-grid{grid-template-columns:1fr}.quick-card{align-items:center}.quick-card p{font-size:12px}.drill-layout{grid-template-columns:1fr}.drill-side{display:grid;grid-template-columns:1fr 1fr;gap:12px}.reference-grid{grid-template-columns:1fr}.reference-grid .wide{grid-column:auto}.top-context{display:none}.stats-grid{gap:9px}.stat{padding:18px}}
@media(max-width:700px){.layout{display:block}.sidebar{transform:translateX(-100%);transition:transform .2s;width:240px}.menu-open .sidebar{transform:translateX(0)}.menu-open .drawer-backdrop{display:block;position:fixed;inset:0;background:#172c284d;z-index:19;border:0}.mobile-toggle{display:flex}.topbar{height:66px;padding:0 18px}.main{padding:25px 18px 36px}.profile-select{max-width:140px;font-size:12px}.profile-tools{gap:5px}.avatar{width:30px;height:30px}.profile-tools .icon-btn{width:33px;height:33px}.page-head{margin-bottom:23px}.page-head .chip{display:none}.page-head p{font-size:12px;line-height:1.6}.levels{grid-template-columns:repeat(3,1fr);gap:8px}.level-card{min-height:113px;padding:13px 15px;gap:6px}.level-number{font-size:28px}.level-card small{font-size:10px}.panel{padding:20px}.form-grid{gap:15px}.lesson-actions{align-items:stretch;flex-direction:column}.lesson-actions .btn.primary{width:100%}.lesson-actions>span{text-align:center}.quick-card{padding:17px}.question-row{grid-template-columns:55px minmax(0,1fr) 16px;gap:9px;padding:14px 12px}.question-row .status-pill{display:none}.row-title{font-size:12px}.filters select{min-width:0;flex:1}.filters .search{flex-basis:100%}.question-body{padding:25px 21px}.question-body h2{font-size:25px}.question-meta{margin-bottom:17px}.question-meta .chip{font-size:10px}.reveal-area,.answer-block,.assessment{padding:20px 21px}.reveal-area .hint-text{display:none}.reveal-area .btn{width:100%}.grade-row{gap:6px}.grade{font-size:10px;padding:10px 5px;flex-direction:column;gap:5px;line-height:1.4}.grade svg{width:17px;height:17px}.session-footer p{display:none}.session-top{align-items:flex-start}.session-track{max-width:190px;gap:4px}.session-track span{width:15px}.session-top .btn{font-size:11px;padding:9px}.session-top .actions{gap:5px}.sound-surface{padding:14px;gap:12px}.sound-surface .wave-bars{display:none}.drill-card{padding:22px 18px;min-height:400px}.drill-card h2{font-size:23px}.options-grid{grid-template-columns:repeat(2,1fr)}.answer-option{font-size:12px}.drill-tabs{gap:6px}.drill-tabs button{font-size:11px;padding:9px 11px}.drill-side{grid-template-columns:1fr 1fr}.drill-side .panel{padding:16px}.stat .big{font-size:29px}.stat p{font-size:10px}.stats-grid{gap:7px}.stat{padding:15px 12px}.progress-table td,.progress-table th{padding:13px 5px;font-size:10px}.history-row{font-size:11px}.reference-grid .panel{padding:19px}.presentation .main{padding:20px 14px}.presentation .question-body{padding:28px 23px}.keyboard{height:95px}.footnote{line-height:1.6}.page-head .actions .btn{font-size:11px;padding:10px}.result-grid{gap:23px}.session-results{padding:30px 17px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;animation:none!important;scroll-behavior:auto!important}}
.lesson-toggles{display:flex;gap:0 20px;flex-wrap:wrap;margin-top:15px}.lesson-toggles .toggle-label{margin:5px 0;font-size:11px}.full-score svg{max-height:none}.exam-intro-list{margin:22px 0;border-top:1px solid var(--line)}.exam-intro-list>div{display:flex;justify-content:space-between;gap:15px;padding:10px 0;border-bottom:1px solid var(--line);font-size:12px}.exam-intro-list>div>span:last-child{color:var(--muted);white-space:nowrap}.presentation .session-footer{justify-content:space-between}.session-card .answer-block>div[lang=de]{line-height:1.8}.drill-card .score-surface{max-width:600px;margin-left:auto;margin-right:auto}.drill-card .score-surface svg{max-height:200px}.full-score svg svg{max-height:none}.question-body .full-score{padding:5px}.session-footer button{flex-shrink:0}.profile-tools{margin-left:auto}.nav .active{position:relative}.nav button.active:before{content:'';width:3px;height:16px;border-radius:5px;background:#bfe1b2;position:absolute;left:-18px}.reference-grid .ref-table td{vertical-align:top}.exam-score{overflow:auto}.skip-link{color:var(--forest)}
@media(max-width:700px){.lesson-toggles{display:block}.lesson-toggles .toggle-label{margin:12px 0}.exam-intro-list>div{font-size:11px}.session-footer .actions{gap:4px}.session-footer .btn{padding:11px 12px;font-size:12px}.page-head .actions{flex-wrap:nowrap}.full-score{overflow-x:auto}.full-score>svg{min-width:540px}.presentation .student-head{gap:12px}.presentation .student-head .btn{font-size:11px}}

.interval-examples{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.interval-examples>div{min-width:0}.interval-examples .eyebrow{margin:12px 0 0}.interval-examples svg{width:100%;display:block}.options-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.teacher-note .eyebrow{display:block;margin-bottom:8px}.teacher-note p{line-height:1.65}.presentation .teacher-only{display:none!important}@media(max-width:480px){.interval-examples{grid-template-columns:1fr}.drill-side{grid-template-columns:1fr}}