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var(--indigo);background:#e3ebfd;background:lab(92.924% -.442714 -9.37362)}.practice-workbench{margin-top:30px}.segmented,.preset-button,.sequence-readout,.setting-row{border-color:var(--line);background:var(--surface)}.segmented button[aria-pressed=true],.preset-button[aria-pressed=true]{color:#fff;background:var(--indigo)}.setting-row{min-height:82px}.login-shell,.progress-loading{background:var(--paper)}.login-panel{border:1px solid var(--line);background:var(--surface);border-radius:16px;max-width:440px;box-shadow:0 18px 45px #22181114;box-shadow:0 18px 45px lab(9.46389% 3.74058 6.52272/.08)}.login-copy h1{font-size:2.4rem}.login-form input,.setting-row select{border-color:var(--line-strong);background:#fff;border-radius:10px}.lesson-page{background:var(--paper);min-height:100vh}.lesson-header{border-bottom-color:var(--line);background:var(--paper);grid-template-columns:40px minmax(0,480px) 88px;justify-content:center;gap:18px;min-height:64px;padding:0 24px}@supports (color:color-mix(in lab, red, red)){.lesson-header{background:color-mix(in oklab, var(--paper) 96%, transparent)}}.lesson-close{width:40px;height:40px;color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:50%;place-items:center;padding:0;display:grid}.lesson-close:hover{color:var(--ink);background:var(--line)}.lesson-progress-copy{width:100%}.lesson-segments{gap:6px;width:100%;display:flex}.lesson-segments>span{background:var(--line);border-radius:99px;flex:1;height:8px;transition:background .22s}.lesson-segments>span.is-filled{background:var(--indigo)}.lesson-header-actions{justify-self:end}.lesson-header-actions .icon-button{width:38px;height:38px;color:var(--muted);background:0 0;border:0}.lesson-main{width:min(620px,100% - 40px);min-height:calc(100vh - 64px);padding:42px 0 104px}.lesson-stage{gap:22px}.stage-copy{text-align:left;max-width:560px;margin:0}.stage-copy:before{content:"Learn · Listen · Play";color:#8d5136;color:lab(41.4086% 23.648 27.3829);font-family:var(--font-mono), monospace;letter-spacing:.05em;text-transform:uppercase;margin-bottom:8px;font-size:.65rem;font-weight:700;display:block}.stage-copy h1{margin-bottom:10px;font-size:clamp(1.8rem,4vw,2.15rem);line-height:1.2}.stage-copy p{color:#433830;color:lab(24.552% 3.59103 6.82721);font-size:1rem;line-height:1.65}.audio-row{justify-content:flex-start}.audio-row .button{min-width:150px}.answer-grid{grid-template-columns:1fr;gap:10px}.answer-option{border-color:var(--line);background:var(--surface);border-radius:10px;min-height:58px;font-weight:600}.answer-option:hover:not(:disabled){border-color:var(--indigo)}.answer-option[aria-pressed=true]{border-color:var(--indigo);box-shadow:inset 0 0 0 1px var(--indigo);background:#e3ebfd;background:lab(92.924% -.442714 -9.37362)}.feedback-panel{border-radius:10px;padding:15px 17px;font-size:.9rem}.stage-actions{z-index:15;border-top:1px solid var(--line);background:var(--surface);align-items:center;width:100vw;min-height:82px;margin:0;padding:14px max(24px,50vw - 280px);position:fixed;bottom:0;left:0}@supports (color:color-mix(in lab, red, red)){.stage-actions{background:color-mix(in oklab, var(--surface) 96%, transparent)}}.stage-actions{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.stage-actions .button{border-radius:14px;width:100%;min-height:52px}.sound-gate,.evaluation-intro,.completion-card{gap:15px;min-height:calc(100vh - 210px)}.sound-gate-icon{width:72px;height:72px;color:var(--indigo);background:#dee8fd;background:lab(91.7379% -.479728 -11.2226)}.completion-icon{color:#fff;background:var(--indigo);width:140px;height:140px;box-shadow:0 0 0 9px #2947931f;box-shadow:0 0 0 9px lab(31.37% 10.0867 -46.0207/.12)}.sound-gate h1,.evaluation-intro h1,.completion-card h1{font-size:clamp(2rem,5vw,2.6rem)}.completion-stat{border-color:var(--line);background:var(--surface)}.piano-scroll,.staff-frame,.staff-editor,.sequence-readout{border-color:var(--line);background:var(--surface);border-radius:12px}@media (max-width:900px){.site-header{-webkit-backdrop-filter:none;backdrop-filter:none;height:64px}.header-inner{width:min(100% - 28px,760px)}.main-nav{background:var(--surface);height:64px}@supports (color:color-mix(in lab, red, red)){.main-nav{background:color-mix(in oklab, var(--surface) 98%, transparent)}}.nav-link{font-size:.67rem}.page-shell{padding-top:36px}.lesson-header{grid-template-columns:40px minmax(0,480px) 78px;padding:0 12px}}@media (max-width:620px){.header-inner{gap:10px}.header-stats{gap:7px;margin-left:auto}.progress-pill{display:none}.xp-display{height:30px;padding:0 9px;font-size:.66rem}.learning-path-shell{padding:26px 16px 102px}.piano-groups{grid-template-columns:repeat(2,minmax(0,1fr));display:grid;overflow:visible}.group-selector{width:100%;min-width:0}.path-unit-card{padding:22px 22px 21px}.path-unit-card h1{font-size:1.34rem}.path-node>a,.path-node>div{left:calc(50% + var(--path-offset));width:150px}.path-node-title{width:150px;font-size:.69rem}.lesson-header{grid-template-columns:36px 1fr 42px;gap:8px}.lesson-header-actions .icon-button:first-child{display:none}.lesson-main{width:min(100% - 32px,620px);padding-top:32px}.stage-actions{padding-left:16px;padding-right:16px}.sound-gate,.evaluation-intro,.completion-card{min-height:calc(100vh - 180px)}}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}