@charset "UTF-8";
:root{--paper:#fffdfa;--ink:#29252b;--muted:#777079;--coral:#cf465a;--coral-dark:#b82e46;--rose:#f7e5e5;--sage:#dce9d8;--lilac:#e5dff5;--line:#e9e4e3;--ease:cubic-bezier(.19,1,.22,1)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;-webkit-font-smoothing:antialiased}button,a{-webkit-tap-highlight-color:transparent}button,input{font:inherit}button{cursor:pointer}a{color:inherit;text-decoration:none}button:disabled{cursor:wait}svg{display:block}img{max-width:100%;display:block}h1,h2,h3,p{margin:0}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #8979d2;outline-offset:5px}.icon-defs{position:absolute;width:0;height:0;overflow:hidden}.icon{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}.skip-link{position:fixed;left:16px;top:-100px;z-index:1000;padding:12px 20px;background:white;border:2px solid var(--coral);border-radius:12px}.skip-link:focus{top:12px}.content-width{width:min(1080px,calc(100% - 96px));margin-inline:auto}.panel{margin-inline:24px;border-radius:32px;overflow:hidden}section[id]{scroll-margin-top:90px}
.site-header{position:sticky;top:0;z-index:30;height:88px;background:rgba(255,253,250,.9);transition:height .25s,box-shadow .25s;backdrop-filter:blur(25px);-webkit-backdrop-filter:blur(25px)}.site-header.is-scrolled{height:70px;box-shadow:0 1px 0 #29252b0c}.nav-inner{width:min(1180px,calc(100% - 96px));height:100%;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:40px}.brand{display:inline-flex;align-items:center;gap:6px;white-space:nowrap}.brand span{font-family:Georgia,"Times New Roman",serif;font-weight:700;font-style:italic;letter-spacing:-.8px;font-size:25px}.brand img{width:34px;height:34px}.desktop-nav{display:flex;gap:34px;margin-left:auto;color:#716b72;font-size:14px}.desktop-nav a{padding:14px 0;transition:color .2s}.desktop-nav a:hover{color:var(--coral)}.nav-actions{display:flex;gap:14px;align-items:center}.button{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:50px;border-radius:999px;padding:13px 25px;border:1px solid transparent;font-size:16px;font-weight:500;line-height:1.3;transition:background .2s,transform .2s,box-shadow .2s;white-space:nowrap}.button:hover{transform:translateY(-2px)}.button:active{transform:translateY(0)}.button-dark{color:white;background:#29252b}.button-dark:hover{background:#49404b;box-shadow:0 5px 15px #29252b18}.button-primary{color:#fff;background:var(--coral)}.button-primary:hover{background:var(--coral-dark);box-shadow:0 5px 15px #cf465a22}.button-soft{background:#f7eceb;color:#9c3d50}.button-soft:hover{background:#f1dfdf}.nav-cta{font-size:13px;min-height:40px;padding:10px 18px}.nav-cta .icon{width:16px;height:16px}.menu-toggle{display:none;background:transparent;border:0;width:44px;height:44px;align-items:center;justify-content:center;flex-direction:column;gap:6px}.menu-toggle span{display:block;width:22px;height:1.5px;background:currentColor}#mobile-nav{position:absolute;top:100%;left:0;right:0;background:var(--paper);padding:16px 24px 26px;box-shadow:0 15px 20px #29252b0d}#mobile-nav:not([hidden]){display:grid;gap:2px}#mobile-nav a{padding:15px 8px;border-bottom:1px solid var(--line);font-size:16px}
.hero{position:relative;overflow:hidden;padding-top:79px;background:#fffdfa}.hero-copy{text-align:center;position:relative;z-index:2;padding-inline:24px}.eyebrow{display:flex;align-items:center;justify-content:inherit;gap:12px;font-size:13px;font-weight:500;line-height:1.6;letter-spacing:.035em}.eyebrow-separator{display:inline-block;width:17px;height:1px;background:currentColor;opacity:.4}.hero-eyebrow{justify-content:center;color:#71646b;font-size:14px;animation:appear .7s var(--ease) both}.app-mark{display:flex;align-items:center;justify-content:center;background:var(--coral);width:30px;height:30px;border-radius:9px;box-shadow:inset 0 0 0 1px #fff3}.app-mark img{filter:invert(1);width:24px;height:24px}.hero h1{font-size:clamp(48px,5.7vw,76px);font-weight:500;letter-spacing:-.055em;line-height:1.19;margin-top:24px;animation:appear .9s .12s var(--ease) both}.hero h1 span{color:var(--coral)}.hero-description{font-size:18px;line-height:1.8;color:var(--muted);margin:24px auto 0;max-width:690px;letter-spacing:.005em;animation:appear .8s .22s var(--ease) both}.mobile-break{display:none}.hero-actions{display:flex;justify-content:center;gap:12px;margin-top:29px;animation:appear .7s .32s var(--ease) both}.hero-scene{position:relative;height:525px;width:min(1140px,100%);margin:62px auto 0;isolation:isolate}.hero-scene:after{content:"";position:absolute;left:-30px;right:-30px;bottom:-1px;height:65px;background:linear-gradient(0deg,var(--paper) 0%,#fffdfa00 100%);z-index:6;pointer-events:none}.scene-orbit{position:absolute;z-index:-2;border-radius:50%;left:50%;transform:translateX(-50%)}.orbit-one{width:1000px;height:395px;top:132px;background:#edf0e7}.orbit-two{width:675px;height:325px;top:172px;border:1px solid #d9e1d0}.music-sun{width:148px;height:148px;border-radius:50%;position:absolute;left:12px;top:72px;background:#ecb797;overflow:hidden;transform:rotate(-22deg)}.music-sun i{display:block;height:3px;background:var(--paper);margin-top:17px}.scene-staff{position:absolute;width:1060px;max-width:none;left:50%;top:80px;transform:translateX(-50%);height:380px;stroke:#b1bda9;stroke-width:1;opacity:.5}.device{position:absolute;border:6px solid #e8e3e1;outline:1px solid #d6d1cf;background:#fff;border-radius:39px;width:284px;height:490px;box-shadow:0 22px 45px #3327260e,0 1px 3px #33272618;overflow:hidden;animation:device-in 1.2s var(--ease) both}.device-status{height:37px;display:flex;align-items:center;justify-content:space-between;padding:0 21px;font-size:10px;font-weight:650;position:relative;color:#29252b}.device-island{position:absolute;width:74px;height:18px;top:5px;left:50%;transform:translateX(-50%);border-radius:20px;background:#252229}.device-content{padding:7px 16px 0}.device-left{left:calc(50% - 392px);top:53px;transform:rotate(-8deg);--rotate:-8deg;animation-delay:.5s;background:#fffafa;z-index:2}.device-center{left:calc(50% - 149px);top:0;width:298px;height:532px;z-index:4;animation-delay:.4s;box-shadow:0 24px 55px #33272619,0 1px 3px #33272618}.device-right{right:calc(50% - 392px);top:53px;transform:rotate(8deg);--rotate:8deg;animation-delay:.6s;background:#f4f2fa;z-index:2}.mini-topline{display:flex;justify-content:space-between;align-items:center;font-size:12px;font-weight:500}.mini-topline>span:first-child{font-size:24px}.mini-progress{height:4px;background:#efdfe0;border-radius:10px;margin:20px 0 25px}.mini-progress i{display:block;width:42%;height:100%;background:var(--coral);border-radius:10px}.mini-kicker{font-size:9px;color:#9b777f;margin-bottom:7px}.device h3{font-size:20px;line-height:1.45;letter-spacing:-.5px;font-weight:550}.mini-score{width:100%;height:129px}.mini-options{display:grid;grid-template-columns:1fr 1fr;gap:8px;font-size:11px}.mini-options span{display:flex;align-items:center;justify-content:space-between;border:1px solid #e6dddd;border-radius:10px;padding:12px 10px;background:white}.mini-options .selected{border-color:#bd3b53;color:#ad2c44;background:#fff1f2}.mini-options .icon{width:13px;height:13px}.mini-feedback{display:flex;align-items:center;gap:6px;margin-top:19px;font-size:10px;color:#977d83}.mini-feedback .icon{width:14px;height:14px}.mini-brand{display:flex;align-items:center;font-family:Georgia,serif;font-size:16px;font-weight:700;font-style:italic;margin:6px 0 22px}.mini-brand img{width:21px;height:21px;margin-right:3px}.mini-brand>span{font-family:inherit;font-style:normal;font-size:8px;font-weight:400;padding:3px 5px;border:1px solid #e3dbd9;border-radius:4px;color:#94767d;margin-left:auto}.mini-home-heading{font-size:30px;font-weight:550;line-height:1.25;letter-spacing:-1.3px}.mini-target{font-size:9px;color:#a67a83;margin-top:10px;display:flex;align-items:center;gap:8px}.mini-target>span{font-size:12px}.mini-continue{position:relative;background:#f7e4e3;border-radius:15px;padding:17px 15px;margin-top:19px;overflow:hidden;isolation:isolate}.continue-label{font-size:9px;color:#a76875}.mini-continue strong{display:block;font-size:13px;font-weight:500;margin-top:10px}.continue-bottom{display:flex;align-items:center;justify-content:space-between;font-size:9px;color:#a85768;margin-top:17px}.mini-round-arrow{display:grid;place-items:center;width:23px;height:23px;border-radius:100%;background:#ca4357;color:white;font-size:16px}.continue-decoration{position:absolute;right:22px;bottom:-13px;color:#e9c5c5;font-family:Georgia,serif;font-size:110px;z-index:-1;transform:rotate(15deg)}.mini-section-heading{display:flex;align-items:center;justify-content:space-between;font-size:11px;font-weight:500;margin:22px 0 12px}.mini-section-heading>span{font-weight:400;color:#9b9295;font-size:8px}.mini-topics{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.mini-topics>div{background:#f7f6f4;border-radius:11px;padding:12px 7px;display:flex;align-items:center;flex-direction:column}.topic-symbol{width:28px;height:28px;border-radius:8px;display:grid;place-items:center;font-family:Georgia,serif;font-size:20px;margin-bottom:8px}.rose{background:#f5e0e2;color:#b33b50}.sage{background:#e4eadf;color:#5a7753}.lilac{background:#e8e1f4;color:#8771a8}.sand{background:#f4e8d6;color:#9c784a}.mini-topics strong{font-size:10px;font-weight:500}.mini-topics>div>span:last-child{font-size:6px;color:#a29999;margin-top:6px;white-space:nowrap}.mini-tabs{display:flex;justify-content:space-between;padding:14px 10px;margin:14px -16px 0;border-top:1px solid #f1edeb;background:white}.mini-tabs>span{display:grid;place-items:center;gap:5px;color:#97929a;font-size:7px}.mini-tabs .icon{width:16px;height:16px}.mini-tabs>.active{color:var(--coral)}.mini-chord-label{font-size:10px;color:#9286a3;letter-spacing:1px;margin-top:30px}.mini-chord-name{font-size:67px;line-height:1.15;font-weight:450;margin-top:7px}.mini-chord-name span{display:block;font-size:12px;color:#887a99;letter-spacing:1px;margin-top:4px}.mini-note-chips{display:flex;gap:10px;margin-top:24px}.mini-note-chips>span{background:#e8e2f5;border-radius:11px;flex:1;text-align:center;padding:9px;font-size:17px;color:#8c6fac}.mini-note-chips small{display:block;font-size:7px;margin-top:4px}.mini-piano{height:83px;position:relative;display:flex;gap:2px;margin-top:20px}.mini-piano b{flex:1;display:flex;align-items:flex-end;justify-content:center;background:#fff;border:1px solid #e5deed;border-radius:0 0 6px 6px;font-size:7px;color:#a79ab4;padding-bottom:7px;font-weight:400}.mini-piano b.tint{background:#ded3ee;color:#7c5d9b}.mini-piano i{position:absolute;width:17px;height:47px;background:#302935;border-radius:0 0 4px 4px;left:24px}.mini-piano i:nth-of-type(2){left:57px}.mini-piano i:nth-of-type(3){left:123px}.mini-piano i:nth-of-type(4){left:155px}.mini-piano i:nth-of-type(5){left:188px}.mini-play{font-size:11px;background:#a28cc4;color:white;border-radius:12px;display:flex;justify-content:center;align-items:center;gap:4px;padding:10px;margin-top:19px}.mini-play .icon{width:16px;height:16px}.mini-tip{font-size:10px;color:#9e90aa;line-height:1.8;text-align:center;margin-top:16px}.floating-note{position:absolute;right:6%;top:6px;font-family:Georgia,serif;font-size:94px;color:#9c8eb7;transform:rotate(14deg);z-index:-1}.visual-caption{text-align:center;font-size:10px;color:#aaa0a2;letter-spacing:.06em;position:relative;z-index:8;padding:10px 0 31px}.visual-caption span{margin:0 7px}
.intro-strip{padding:26px 24px 54px}.intro-strip-inner{max-width:986px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:30px}.intro-strip p{font-size:15px;color:#958b92;line-height:1.7}.intro-strip strong{font-weight:450;color:#4d444c}.intro-strip-inner>span{display:flex;align-items:center;gap:13px;font-size:17px;color:#5f555e}.intro-strip .icon{width:26px;height:26px;color:#8e7f8d}
.sound-section{background:#29212e;color:#fff9f7;padding:94px 48px 60px}.section-intro{text-align:center}.section-intro .eyebrow{justify-content:center}.sound-section .eyebrow{color:#bbacbf}.section-intro h2{font-size:clamp(36px,4.3vw,58px);line-height:1.22;font-weight:450;letter-spacing:-.045em;margin-top:23px}.section-intro>p{font-size:17px;line-height:1.8;margin-top:24px;color:#a89cab}.lab{width:min(900px,100%);margin:51px auto 0;background:#342b39;border:1px solid #ffffff0e;border-radius:24px;padding:25px 34px 18px;overflow:hidden}.lab-top{display:flex;justify-content:space-between;font-size:11px;color:#b5a3b7}.lab-label{display:flex;align-items:center;gap:8px}.live-dot{width:6px;height:6px;border-radius:100%;background:#ceb4d2;display:inline-block}.lab-hint{font-size:10px;color:#8e7e92}.lab-main{display:grid;grid-template-columns:1fr 1fr;gap:55px;padding:36px 12px 28px}.chord-illustration{padding-top:10px}.chord-circles{display:flex;align-items:center;justify-content:center;gap:14px}.chord-circles span{display:flex;align-items:center;justify-content:center;border-radius:50%;width:72px;height:72px;font-size:30px;font-weight:400;background:#e5dadf;color:#5c4155;transition:background .3s,transform .3s}.chord-circles span:nth-child(2){background:#efa8a8;transform:translateY(-10px);color:#763943}.chord-circles span:nth-child(3){background:#d9c4e8;color:#76558c}[data-active-chord="minor"] .chord-circles span:nth-child(2){background:#b6a2d6;color:#473659;transform:translateY(0)}.chord-equation{display:flex;justify-content:center;gap:19px;font-size:10px;color:#ac98b0;margin-top:16px}.chord-equation span{opacity:.5}.lab-score{width:100%;max-width:295px;height:116px;margin:13px auto 0;color:#e4c7db}[data-minor-flat]{opacity:0;transition:opacity .2s}[data-active-chord="minor"] [data-minor-flat]{opacity:1}.chord-toggle{display:inline-flex;padding:4px;gap:2px;border:1px solid #ffffff12;background:#2c2431;border-radius:40px}.chord-toggle button{min-height:40px;background:transparent;color:#bbaec0;border:0;border-radius:99px;padding:10px 18px;font-size:12px;transition:background .2s,color .2s}.chord-toggle button[aria-pressed="true"]{background:#f4e8ed;color:#5e3f52}.chord-controls h3{font-size:27px;font-weight:450;margin-top:22px;letter-spacing:-.04em}.chord-notes{font-size:15px;color:#d9afbc;letter-spacing:.12em;margin-top:8px}#chord-copy{font-size:13px;line-height:1.8;max-width:285px;margin-top:14px;min-height:47px;color:#b9acbd}.button-audio{font-size:12px;min-height:42px;padding:10px 17px;background:#eab6bd;color:#653b4e;margin-top:18px}.button-audio:hover{background:#f3c8cf}.button-audio .icon{width:17px;height:17px}.keyboard{height:153px;position:relative;display:flex;gap:5px;padding:0;isolation:isolate}.key{touch-action:manipulation;border:0;transition:background .16s,box-shadow .16s,transform .12s;display:flex;align-items:flex-end;justify-content:center;user-select:none}.key.white{flex:1;min-width:0;height:100%;background:#f6f1ed;box-shadow:inset 0 -6px 0 #dbd4d1;border-radius:3px 3px 10px 10px;color:#ac9da7;font-size:12px;padding:0 0 17px}.key.black{position:absolute;top:-1px;left:var(--left);transform:translateX(-50%);height:60%;width:8%;border-radius:0 0 7px 7px;background:#211c26;box-shadow:inset 0 -5px 0 #0f0d12;color:#84728c;z-index:2;padding-bottom:11px;font-size:10px}.key.white.is-chord-tone{background:#f1d2d7;color:#9c526a;box-shadow:inset 0 -6px 0 #d2a7b3}.key.black.is-chord-tone{background:#806c9a;color:#eeddfd;box-shadow:inset 0 -5px 0 #655078}.key.white:hover{background:#fff}.key.white.is-active{background:#dc92a6;color:#633348;transform:translateY(3px);box-shadow:inset 0 -2px 0 #bb6b84}.key.black:hover{background:#4a3a54}.key.black.is-active{background:#ab83c9;color:white;transform:translate(-50%,3px);box-shadow:inset 0 -2px 0 #8862a3}.lab-footer{display:flex;justify-content:space-between;gap:16px;margin-top:17px;font-size:10px;color:#9c89a2;min-height:14px}.lab-footer>span:last-child{color:#ceb9d0;text-align:right}.sound-outro{width:min(900px,100%);margin:34px auto 0;display:flex;justify-content:space-between;align-items:center;gap:20px}.sound-outro p{font-size:16px;line-height:1.8;color:#f0e4ed}.sound-outro p span{font-size:13px;color:#a797af}.text-link{display:inline-flex;gap:10px;align-items:center;min-height:44px;font-size:14px;font-weight:500;border-bottom:1px solid currentColor;padding-bottom:3px;transition:gap .2s,color .2s}.text-link:hover{gap:16px}.text-link .icon{width:17px;height:17px}.sound-outro .text-link{color:#d8bfdc;font-size:13px}
.practice-section{display:grid;grid-template-columns:1fr 1.1fr;gap:85px;padding-top:124px;padding-bottom:112px}.practice-copy .eyebrow{color:#9d7b83}.practice-copy h2,.continuity h2,.faq h2{font-size:43px;font-weight:450;line-height:1.28;letter-spacing:-.045em;margin-top:24px}.practice-copy>p,.continuity p{font-size:16px;line-height:1.9;color:#8c8188;margin-top:23px}.exam-chips{display:flex;gap:9px;margin-top:24px}.exam-chips span{font-size:11px;padding:9px 12px;border:1px solid #e7deda;border-radius:7px;color:#8b747b;background:#fff}.practice-copy .text-link{margin-top:23px;color:#aa5265}.path-art{width:310px;max-width:100%;position:relative;margin:34px 0 0}.path-art svg{width:100%;height:168px;fill:#fffdfa}.path-art path{stroke:#dbd3db;stroke-width:2;stroke-dasharray:4 7;fill:none}.path-art circle{stroke:#cbbdce;stroke-width:2}.path-art circle:nth-last-child(2){fill:#d5c2e5;stroke:#d5c2e5}.path-art circle:last-child{fill:#ca465b;stroke:#ca465b}.path-note{position:absolute;right:4px;bottom:20px;font-size:11px;color:#b299a6}.topic-list{border-top:1px solid var(--line)}.topic-row{display:flex;align-items:center;gap:16px;padding:19px 0;border-bottom:1px solid var(--line)}.topic-number{font-size:10px;letter-spacing:.04em;color:#ada1a5;width:18px}.topic-glyph{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-size:30px;font-family:Georgia,serif}.topic-row h3{font-size:17px;font-weight:500}.topic-row p{font-size:11px;color:#94858e;margin-top:6px}.topic-tail{margin-left:auto;font-size:8px;letter-spacing:.1em;color:#b4a8ad}
.experience-section{background:#f0f2e9;padding:88px 0 82px}.experience-section .eyebrow{color:#778266}.experience-section .section-intro>p{color:#7d8472}.experience-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:80px;align-items:center;margin-top:66px}.rhythm-art{position:relative;padding:0 0 44px;isolation:isolate}.rhythm-art:before{content:"";position:absolute;width:335px;height:335px;background:#e0e6d4;border-radius:50%;left:40px;top:30px;z-index:-1}.art-tag{font-size:11px;color:#748269;display:flex;align-items:center;gap:8px;margin-left:22px;margin-bottom:16px}.art-tag .live-dot{background:#8b9b79}.rhythm-sheet{background:#fffefa;padding:26px 25px 21px;border:1px solid #e1e4d6;border-radius:19px;transform:rotate(-3deg);box-shadow:0 18px 30px #5465330a}.sheet-heading{display:flex;justify-content:space-between;font-size:12px;color:#7c806e}.sheet-heading>span:last-child{font-family:Georgia,serif;font-style:italic;color:#a3aa94}.rhythm-sheet>svg{width:100%;height:176px;margin-top:18px}.sheet-play{display:flex;align-items:center;gap:15px}.sheet-play-button{display:grid;place-items:center;width:34px;height:34px;background:#dce5d4;border-radius:50%;color:#7b8f68}.sheet-play-button .icon{width:17px;height:17px}.sheet-play-line{height:3px;background:#eaeee3;flex:1;border-radius:6px}.sheet-play-line i{display:block;width:52%;height:100%;background:#91a37c;border-radius:6px}.sheet-volume{color:#9eae8c}.sheet-volume .icon{width:21px;height:21px}.annotation-card{display:flex;align-items:center;gap:12px;background:#fffdfa;border:1px solid #e6e5d9;border-radius:15px;padding:19px 24px;transform:rotate(3deg);width:84%;margin:-3px 0 0 auto;box-shadow:0 12px 20px #414a3009;position:relative}.annotation-card>span{width:33px;height:33px;background:#e6eadf;color:#7e946a;border-radius:50%;display:grid;place-items:center}.annotation-card .icon{width:19px;height:19px}.annotation-card strong{font-size:13px;font-weight:500}.annotation-card p{font-size:10px;color:#92917c;margin-top:6px}.art-caption{font-size:10px;position:absolute;bottom:4px;left:23px;color:#a9b09c}.experience-steps{padding-left:10px}.experience-steps article{display:flex;gap:22px;margin-bottom:35px}.experience-steps article>span{font-size:10px;color:#8c9a77;padding-top:8px}.experience-steps h3{font-size:22px;font-weight:500;letter-spacing:-.035em}.experience-steps p{font-size:14px;line-height:1.85;color:#7e8476;margin-top:12px}.experience-steps .text-link{margin-left:35px;margin-top:0;color:#60734d}
.continuity{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:60px;padding:114px 0}.continuity .eyebrow{font-size:12px;color:#9a8096}.continuity h2{font-size:48px}.continuity .text-link{margin-top:27px;color:#9b6b8a}.continuity-art{position:relative;height:365px}.progress-ring{position:relative;width:300px;height:300px;margin:0 auto}.progress-ring>svg{width:100%;height:100%;fill:none;stroke-width:22;stroke-linecap:round}.ring-track{stroke:#f1ebef}.ring-progress{stroke:#cbb7d4}.ring-center{position:absolute;inset:0;display:grid;place-items:center}.ring-center .icon{width:78px;height:78px;stroke-width:1;color:#a181af;transform:rotate(-12deg)}.ring-dot{position:absolute;width:37px;height:37px;right:21px;top:32px;border-radius:50%;background:#e7d7eb;box-shadow:0 0 0 9px var(--paper)}.resume-card{position:relative;margin:-22px auto 0;width:min(385px,100%);padding:20px 23px;border:1px solid #e9e1e8;border-radius:17px;background:#fff;display:flex;align-items:center;gap:13px;box-shadow:0 14px 28px #5b385408;transform:rotate(-4deg)}.resume-icon{display:grid;place-items:center;background:#f0e9f2;border-radius:11px;width:42px;height:42px;color:#a38ab0}.resume-icon .icon{width:21px;height:21px}.resume-card small{display:block;font-size:10px;color:#ae9ba7;margin-bottom:7px}.resume-card strong{font-size:13px;font-weight:500;color:#806477}.resume-card>span:last-child{margin-left:auto;color:#b79dc1}
.faq{border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1.3fr;gap:80px;padding-top:74px;padding-bottom:100px}.faq .eyebrow{color:#9c8c94}.faq h2{font-size:33px;margin-top:15px}.faq-list details{border-bottom:1px solid var(--line)}.faq-list details:first-child{border-top:1px solid var(--line)}.faq-list summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:15px;min-height:78px;font-size:15px}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary>span{font-size:22px;font-weight:300;color:#b1a3ac;transition:transform .2s}.faq-list details[open] summary>span{transform:rotate(45deg)}.faq-list details[open] summary{color:var(--coral)}.faq-list details p{font-size:13px;color:#8f7f89;line-height:1.9;padding:0 30px 24px 0}
.final-cta{position:relative;background:#f2dddf;text-align:center;padding:62px 24px 82px;isolation:isolate}.cta-mark{width:74px;height:74px;display:grid;place-items:center;margin:0 auto 16px}.cta-mark img{opacity:.75}.final-cta h2{font-size:57px;font-weight:450;line-height:1.23;letter-spacing:-.045em}.final-cta p{font-size:15px;color:#a57b84;margin-top:22px}.final-cta .button{margin-top:28px}.cta-lines{position:absolute;inset:0;overflow:hidden;z-index:-1;opacity:.3;transform:rotate(-15deg)}.cta-lines i{display:block;position:absolute;border:1px solid #d0a9b1;border-radius:50%;width:175%;height:840px;left:-31%;top:50px}.cta-lines i:nth-child(2){top:75px}.cta-lines i:nth-child(3){top:100px}.cta-lines i:nth-child(4){top:125px}.cta-lines i:nth-child(5){top:150px}.site-footer{padding:50px 0 25px}.footer-top{display:flex;align-items:center;gap:40px;padding-bottom:35px}.footer-top .brand span{font-size:23px}.footer-top>p{font-size:12px;color:#a29199}.footer-top>a:last-child{margin-left:auto;display:flex;align-items:center;gap:8px;font-size:12px;color:#7b6774;min-height:44px}.footer-top>a:last-child .icon{width:14px;height:14px}.footer-bottom{border-top:1px solid var(--line);padding-top:24px;display:flex;justify-content:space-between;gap:20px;font-size:9px;color:#afa1a8}.footer-bottom>a{color:#a18e99}.footer-bottom>span:last-child{font-family:Georgia,serif;font-style:italic}
[data-reveal]{transition:opacity .8s var(--ease),transform .8s var(--ease)}html.motion-ready [data-reveal]:not(.is-visible){opacity:0;transform:translateY(24px)}.is-playing{box-shadow:0 0 0 5px #cf465a14}.button-audio.is-playing{background:#efd2d8}.button:disabled{opacity:.8}.hero-listen.is-playing{color:#c13550}@keyframes appear{from{opacity:0;transform:translateY(15px)}to{opacity:1;transform:translateY(0)}}@keyframes device-in{from{opacity:0;translate:0 40px;scale:.97}to{opacity:1;translate:0 0;scale:1}}
@media(min-width:1500px){.hero{padding-top:100px}.hero-scene{margin-top:70px}}
@media(max-width:1100px){.nav-inner{width:calc(100% - 64px);gap:25px}.content-width{width:calc(100% - 80px)}.desktop-nav{gap:24px}.hero h1{font-size:66px}.practice-section{gap:45px}.practice-copy h2{font-size:36px}.topic-tail{display:none}.experience-grid{gap:48px}.experience-steps h3{font-size:20px}.sound-section{padding-inline:36px}.lab-main{gap:32px}.faq{gap:44px}.continuity{gap:40px}.device-left{left:calc(50% - 374px)}.device-right{right:calc(50% - 374px)}.music-sun{left:5%}.floating-note{right:4%}.footer-top{gap:20px}}
@media(max-width:760px){html{scroll-padding-top:85px}.site-header{height:73px}.site-header.is-scrolled{height:65px}.nav-inner{width:calc(100% - 40px);gap:12px}.brand span{font-size:22px}.brand img{width:30px;height:30px}.desktop-nav{display:none}.nav-cta{min-height:38px;font-size:12px;padding:10px 14px}.nav-cta .icon{display:none}.menu-toggle{display:flex}.nav-actions{gap:6px}.content-width{width:calc(100% - 48px)}.panel{margin-inline:12px;border-radius:26px}.hero{padding-top:57px}.hero h1{font-size:52px;margin-top:20px;letter-spacing:-.055em}.hero-eyebrow{font-size:11px;gap:8px}.app-mark{width:25px;height:25px;border-radius:8px}.app-mark img{width:21px;height:21px}.hero-description{font-size:15px;line-height:1.85;margin-top:20px}.mobile-break{display:block}.hero-actions{margin-top:23px;gap:9px}.button{min-height:46px;padding:12px 20px;font-size:14px;gap:8px}.button .icon{width:18px;height:18px}.hero-scene{margin-top:46px;height:438px}.device-center{width:266px;height:480px;left:calc(50% - 133px);border-width:5px;border-radius:35px}.device-left,.device-right{width:244px;height:455px;top:53px;opacity:.86}.device-left{left:calc(50% - 335px)}.device-right{right:calc(50% - 335px)}.device-center .device-content{padding:6px 13px 0}.mini-home-heading{font-size:26px}.mini-brand{margin-bottom:17px}.mini-continue{margin-top:16px;padding:15px 12px}.mini-section-heading{margin-top:17px}.mini-topics>div{padding:9px 5px}.mini-tabs{margin-top:12px}.orbit-one{width:750px;height:340px;top:120px}.orbit-two{width:500px;height:300px;top:150px}.scene-staff{width:850px;top:68px}.music-sun{width:110px;height:110px;top:15px;left:calc(50% - 225px)}.floating-note{right:calc(50% - 230px);font-size:70px;top:-6px}.visual-caption{font-size:8px;padding-bottom:20px}.intro-strip{padding:21px 24px 40px}.intro-strip-inner{gap:16px}.intro-strip p{font-size:11px}.intro-strip-inner>span{font-size:12px;gap:7px}.intro-strip .icon{width:20px;height:20px}.sound-section{padding:64px 22px 37px}.section-intro h2{font-size:42px;margin-top:20px}.eyebrow{font-size:11px}.section-intro>p{font-size:14px;margin-top:21px}.lab{margin-top:34px;padding:22px 22px 18px}.lab-main{gap:26px;padding:30px 0 26px}.chord-circles{gap:8px}.chord-circles span{width:56px;height:56px;font-size:25px}.chord-equation{gap:13px;font-size:8px}.chord-toggle button{font-size:11px;padding:9px 12px;min-height:38px}.chord-controls h3{font-size:23px;margin-top:18px}.chord-notes{font-size:13px}#chord-copy{font-size:11px;min-height:42px}.button-audio{min-height:40px;font-size:11px;padding:9px 16px}.keyboard{height:132px;gap:4px}.key.white{font-size:10px}.key.black{font-size:8px}.lab-footer{font-size:8px}.sound-outro{margin-top:25px}.sound-outro p{font-size:13px}.sound-outro p span{font-size:11px}.sound-outro .text-link{font-size:11px}.practice-section{padding-top:72px;padding-bottom:68px;gap:33px;grid-template-columns:1fr}.practice-copy h2{font-size:37px;margin-top:18px}.practice-copy>p{font-size:14px;line-height:1.85;margin-top:18px}.exam-chips{margin-top:19px}.practice-copy .text-link{margin-top:20px}.path-art{display:none}.topic-row{padding:17px 0;gap:17px}.topic-tail{display:block}.topic-row h3{font-size:16px}.topic-row p{font-size:11px}.topic-glyph{width:43px;height:43px;font-size:27px}.experience-section{padding:61px 0 56px}.experience-grid{width:calc(100% - 48px);grid-template-columns:1fr;gap:35px;margin-top:40px}.rhythm-art{max-width:460px;width:100%;margin:auto}.experience-steps{padding-left:0;max-width:460px;margin:auto;width:100%}.experience-steps article{margin-bottom:27px}.experience-steps h3{font-size:20px}.experience-steps p{font-size:13px}.experience-steps .text-link{font-size:13px}.continuity{padding:70px 0;gap:35px}.continuity h2{font-size:37px}.continuity p{font-size:13px}.continuity-art{height:300px}.progress-ring{width:235px;height:235px}.ring-center .icon{width:62px;height:62px}.ring-dot{width:27px;height:27px;top:27px;right:19px}.resume-card{padding:15px 14px;width:300px;margin-left:-20px}.resume-card strong{font-size:11px}.resume-card small{font-size:8px}.resume-icon{width:32px;height:32px}.faq{grid-template-columns:1fr;gap:30px;padding-top:55px;padding-bottom:62px}.faq h2{font-size:31px}.faq-list summary{min-height:72px;font-size:14px}.faq-list details p{font-size:12px}.final-cta{padding:48px 20px 60px}.final-cta h2{font-size:43px}.final-cta p{font-size:13px}.cta-mark{width:57px;height:57px;margin-bottom:19px}.cta-mark img{width:57px;height:57px}.site-footer{padding-top:34px;padding-bottom:25px}.footer-top{gap:14px;flex-wrap:wrap;padding-bottom:24px}.footer-top .brand span{font-size:22px}.footer-top>p{font-size:10px}.footer-top>a:last-child{font-size:11px}.footer-bottom{font-size:8px;flex-wrap:wrap;row-gap:14px}.footer-bottom>span:last-child{width:100%}}
@media(max-width:520px){.hero{padding-top:45px}.hero h1{font-size:44px;line-height:1.25}.hero-eyebrow{font-size:10px}.hero-description{font-size:14px;line-height:1.85}.hero-actions{gap:8px}.hero-actions .button{font-size:13px;padding:12px 18px}.hero-scene{height:425px;margin-top:40px}.device-left,.device-right{display:none}.device-center{width:276px;left:calc(50% - 138px)}.device-center .mini-home-heading{font-size:28px}.device-center .mini-topics>div{padding:12px 6px}.hero-scene:after{height:70px}.orbit-one{width:490px;height:265px;top:170px}.orbit-two{width:360px;height:260px;top:170px}.music-sun{left:calc(50% - 190px);top:84px;width:90px;height:90px}.floating-note{right:calc(50% - 186px);top:16px;font-size:63px}.scene-staff{width:600px;top:89px;opacity:.35}.intro-strip{padding:16px 24px 34px}.intro-strip-inner{display:grid;grid-template-columns:repeat(3,1fr);row-gap:21px;text-align:center}.intro-strip-inner>p{grid-column:1/-1;font-size:13px}.intro-strip p br{display:none}.intro-strip strong{margin-left:5px}.intro-strip-inner>span{justify-content:center;font-size:11px;gap:6px}.intro-strip .icon{width:18px;height:18px}.sound-section{padding-inline:16px}.section-intro h2{font-size:36px}.section-intro>p{font-size:13px;line-height:1.9}.lab{padding:18px 15px 14px;border-radius:19px}.lab-top{font-size:10px}.lab-hint{font-size:8px}.lab-main{grid-template-columns:1fr;gap:22px;padding-top:28px}.chord-illustration{padding:0}.chord-circles{gap:13px}.chord-circles span{width:61px;height:61px;font-size:27px}.chord-equation{font-size:9px;gap:20px;margin-top:12px}.lab-score{display:none}.chord-controls{text-align:center}.chord-controls h3{font-size:24px;margin-top:18px}#chord-copy{margin:12px auto 0;font-size:12px;max-width:260px;min-height:42px}.chord-toggle button{min-height:40px;padding:9px 20px}.button-audio{margin-top:15px;min-height:44px;font-size:12px}.keyboard{height:116px;gap:3px}.key.white{padding-bottom:11px;border-radius:2px 2px 7px 7px;font-size:9px}.key.black{width:8.5%;font-size:0;border-radius:0 0 5px 5px}.key.black span{visibility:hidden}.lab-footer{flex-direction:column;align-items:center;gap:7px;font-size:8px;margin-top:14px}.lab-footer>span:last-child{text-align:center;min-height:12px}.sound-outro{flex-direction:column;text-align:center;gap:13px}.sound-outro p{font-size:14px}.sound-outro p span{font-size:11px}.sound-outro .text-link{font-size:12px}.practice-copy h2{font-size:34px}.desktop-break{display:none}.topic-tail{font-size:7px;letter-spacing:0}.topic-row{gap:13px}.topic-row p{font-size:10px}.topic-number{font-size:9px;width:14px}.topic-glyph{width:41px;height:41px}.experience-grid{width:calc(100% - 38px);gap:27px}.rhythm-art:before{width:260px;height:260px;left:25px}.rhythm-sheet{padding:21px 18px 18px;border-radius:15px}.rhythm-sheet>svg{height:140px;margin-top:13px}.sheet-heading{font-size:11px}.annotation-card{width:92%;padding:15px 16px;gap:10px}.annotation-card strong{font-size:12px}.annotation-card p{font-size:9px}.art-tag{font-size:10px;margin-left:9px}.art-caption{font-size:9px}.experience-steps article{gap:18px}.experience-steps .text-link{margin-left:31px}.continuity{grid-template-columns:1fr;padding-top:66px;padding-bottom:65px;gap:35px}.continuity h2{font-size:38px}.continuity p{font-size:14px}.continuity-art{height:303px}.progress-ring{width:260px;height:260px}.resume-card{width:calc(100% - 12px);max-width:340px;margin-left:auto}.resume-card strong{font-size:12px}.resume-card small{font-size:9px}.ring-dot{top:31px;right:20px}.faq-list summary{font-size:13px}.faq{gap:26px}.final-cta h2{font-size:37px}.final-cta p{font-size:11px}.footer-top>p{order:3;width:100%;margin-top:-8px}.footer-top>a:last-child{font-size:10px}.footer-top .brand span{font-size:21px}.footer-top .brand img{width:29px;height:29px}.footer-bottom{font-size:8px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}[data-reveal],html.motion-ready [data-reveal]:not(.is-visible){opacity:1;transform:none}.button:hover{transform:none}}

/* Keep piano touch targets usable on narrow screens. */
.keyboard-scroll{width:100%;min-width:0;overflow-x:auto;padding-bottom:4px;scrollbar-width:thin;scrollbar-color:#806a8a transparent}.keyboard-hint{display:none}.chord-toggle button{min-height:44px}.nav-cta{min-height:44px}
@media(max-width:760px){.button-audio{min-height:44px}.keyboard{min-width:460px}.key.black{width:44px}.keyboard-hint{display:inline}}

@media(max-width:520px){.hero h1{font-size:clamp(36px,11.3vw,44px)}.section-intro h2{font-size:clamp(30px,9.2vw,36px)}.final-cta h2{font-size:clamp(32px,9.5vw,37px)}}
@media(max-width:360px){.nav-inner{width:calc(100% - 32px)}.brand span{font-size:19px}.brand img{width:27px;height:27px}.nav-actions{gap:0}.nav-cta{font-size:11px;padding-inline:12px}.practice-copy h2{font-size:30px}.topic-tail{display:none}.lab-top{gap:8px}.lab-hint{font-size:7px}}

/* Proportional keyboard geometry and projection-friendly body contrast. */
.mini-piano i{left:14.2857%;width:7.5%;transform:translateX(-50%)}.mini-piano i:nth-of-type(2){left:28.5714%}.mini-piano i:nth-of-type(3){left:57.1429%}.mini-piano i:nth-of-type(4){left:71.4286%}.mini-piano i:nth-of-type(5){left:85.7143%}
.practice-copy>p,.continuity p{color:#746b73}.topic-row p{color:#7c7079}.experience-steps p,.experience-section .section-intro>p{color:#626b5d}.lab-hint{color:#b2a3b6}.visual-caption{color:#817680}.footer-bottom,.footer-bottom>a{color:#82727c}.final-cta p{color:#805c68}.faq-list details p{color:#766570}

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