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solid #2d333b99;justify-content:space-between;align-items:center;gap:12px;padding:9px 0;display:flex}.dash-chapter:last-child{border-bottom:none}.dash-chapter__left{flex:1;align-items:center;gap:10px;min-width:0;display:flex}.dash-chapter__title{color:var(--text);white-space:nowrap;text-overflow:ellipsis;font-size:13px;font-weight:500;overflow:hidden}.dash-chapter__level{letter-spacing:.04em;margin-top:1px;font-size:10px;font-weight:600}.dash-chapter__right{flex-shrink:0;align-items:center;gap:12px;display:flex}.dash-chapter__counts{text-align:right;font-variant-numeric:tabular-nums;min-width:72px;font-size:11px}.dash-chapter__bar{background:var(--surface2);border-radius:99px;width:72px;height:3px;overflow:hidden}.dash-chapter__bar-fill{border-radius:99px;height:100%;transition:width .4s}@media (width<=640px){.app-header{padding:0 14px}.nav-tab{padding:5px 9px;font-size:12px}.app-logo__sub{display:none}.chapter-right{gap:6px}.mini-bar,.chapter-progress{display:none}.progress-summary__stats{gap:14px}.stat-value{font-size:20px}.modal{border-radius:10px;max-height:96svh}.bpm-number{font-size:52px}.note-name{font-size:58px}.presets,.dash-stats{grid-template-columns:repeat(2,1fr)}.dash-stat__value{font-size:22px}.dash-chapter__bar{width:44px}.dash-chapter__counts{min-width:52px}.dash-hero__exercise{font-size:17px}.modal-header{padding:16px 16px 12px}.notation-wrapper{padding:12px 14px}.tempo-bar{padding:8px 16px}.modal-actions{padding:10px 16px}.mastery-bar{flex-direction:column;align-items:stretch;gap:10px;padding:12px 16px}.btn-validate{width:100%}.exercise-mastery{display:none}.onb-hero{padding:26px 20px}.onb-hero__title{font-size:22px}.onb-hero__lead{font-size:14px}.onb-steps{grid-template-columns:1fr;gap:16px}.onb-tools{grid-template-columns:1fr}}