@font-face{font-family:Outfit;src:url('assets/fonts/outfit-regular.ttf') format('truetype');font-weight:400;font-display:swap}
@font-face{font-family:Outfit;src:url('assets/fonts/outfit-medium.ttf') format('truetype');font-weight:500;font-display:swap}
@font-face{font-family:Outfit;src:url('assets/fonts/outfit-semibold.ttf') format('truetype');font-weight:600;font-display:swap}
@font-face{font-family:Outfit;src:url('assets/fonts/outfit-bold.ttf') format('truetype');font-weight:700;font-display:swap}
@font-face{font-family:Outfit;src:url('assets/fonts/outfit-extrabold.ttf') format('truetype');font-weight:800;font-display:swap}
@font-face{font-family:Outfit;src:url('assets/fonts/outfit-black.ttf') format('truetype');font-weight:900;font-display:swap}
header .school,header nav,header .switcher{font-family:Outfit,Arial,sans-serif}
header{gap:20px;padding:15px 28px;min-height:88px}
header .school{min-width:310px;gap:13px;font-size:21px;font-weight:800;letter-spacing:-.5px;line-height:1.1}
header .school img{width:55px;height:62px}
header nav{gap:10px;justify-content:space-between}
header nav a{font-size:14px;font-weight:650;gap:8px;padding:13px 0 10px}
header nav svg.lucide{width:27px;height:27px;stroke-width:1.9}
header .switcher{border-left:1px solid var(--line);padding-left:14px;font-size:11px;gap:5px}
header .switch{width:32px;height:19px}
header .switch span{width:13px;height:13px}
header .toptools{gap:2px;padding-left:8px}
header .toptools button{width:24px;height:25px;font-size:10px;background:transparent}
body.homepage{--ink:#005039;--green:#005039;--muted:#585d69;--blue:#039ff0}
body.homepage #app{max-width:1920px;padding:27px 34px 14px}
.hp-home{font-family:Outfit,Arial,sans-serif}
.hp-hero{display:grid;grid-template-columns:34% 66%;height:clamp(370px,calc(100svh - 480px),560px);position:relative;isolation:isolate}
.hp-introtext{align-self:center;padding:0 24px 28px 0;position:relative;z-index:3}
.hp-eyebrow{font-family:Arial,sans-serif;text-transform:uppercase;letter-spacing:3px;font-size:13px;color:#565c70;margin:0 0 33px}
.hp-eyebrow:after{content:'';display:block;background:#009ff3;width:58px;height:6px;border-radius:5px;margin-top:17px}
.hp-introtext h1{font-family:Outfit,Arial,sans-serif;font-size:clamp(46px,4.4vw,86px);font-weight:900;letter-spacing:-3.5px;line-height:1.03;margin:0 0 24px;color:#003c2a}
.hp-introtext h1 span{display:block;white-space:nowrap}
.hp-introtext p{font-family:Arial,sans-serif;font-size:clamp(15px,1.27vw,24px);line-height:1.5;max-width:560px;color:#555c6e;letter-spacing:-.5px;margin:0 0 27px}
.hp-start{display:inline-flex;align-items:center;gap:40px;background:#005039;color:white;text-decoration:none;padding:13px 25px;border-radius:8px;font-family:Outfit,sans-serif;font-size:clamp(20px,1.9vw,35px);line-height:1.25;font-weight:800;letter-spacing:-.5px}
.hp-start span{font-family:Arial,sans-serif;font-size:1.35em;line-height:.6;font-weight:500;transform:translateY(-1px)}
.hp-start:hover{background:#05734f}.hp-start:focus-visible{outline:3px solid #029df2;outline-offset:5px}
.hp-scene{display:grid;grid-template-columns:34% 66%;height:100%;position:relative;min-width:0;align-items:center}
.hp-art{grid-column:1;grid-row:1;width:126%;height:auto;max-height:92%;object-fit:contain;object-position:center bottom;align-self:end;margin-left:-18%;margin-bottom:35px;position:relative;z-index:1;pointer-events:none}
.hp-codewindow{grid-column:2;grid-row:1;align-self:center;transform:translateY(-24px);border:5px solid #00533c;border-radius:15px;overflow:hidden;z-index:2;position:relative;background:#f5fbfe;min-width:0}
.hp-windowbar{height:36px;display:flex;gap:12px;align-items:center;padding:0 18px;background:#00543b}
.hp-windowbar i{width:13px;height:13px;border-radius:50%;background:#00aff1;display:block}.hp-windowbar i:nth-child(2){background:#009c5e}.hp-windowbar i:nth-child(3){background:#47c46a}
.hp-codebody{padding:12px;background:linear-gradient(120deg,#fbfefe,#f2faff)}
.hp-source{margin:0;padding:18px 17px 20px;font-family:Consolas,'Liberation Mono',monospace;font-size:clamp(11px,.99vw,19px);line-height:1.65;font-weight:400;border:1px solid #c5e4f4;background:#fff;border-radius:7px;white-space:pre;overflow-x:auto;letter-spacing:-.35px;color:#092c23}
.hp-output{background:#eaf6fc;border:1px solid #c3e3f3;border-radius:7px;margin-top:12px;padding:12px 18px 13px;color:#152821}
.hp-outputlabel{display:flex;align-items:center;gap:16px;margin-bottom:5px;font-size:16px;color:#57596b}
.hp-play{width:0;height:0;border-top:12px solid transparent;border-bottom:12px solid transparent;border-left:22px solid #00553c;flex-shrink:0;border-radius:3px}
.hp-result{font-family:Consolas,'Liberation Mono',monospace;font-size:clamp(13px,1.35vw,25px);line-height:1.45;letter-spacing:-.4px;padding-left:38px;white-space:nowrap}
.hp-example{font-family:Arial,sans-serif;font-size:clamp(10px,1.02vw,18px);color:#646974;margin:4px 0 0 38px;line-height:1.4}
.hp-process{position:absolute;left:22%;right:0;bottom:12px;display:grid;grid-template-columns:repeat(3,1fr);gap:4px;height:61px;z-index:3;padding-right:23px}
.hp-step{display:flex;align-items:center;justify-content:center;gap:20px;color:white;background:#36b5fa;clip-path:polygon(0 0,93% 0,100% 50%,93% 100%,0 100%,7% 50%);padding:10px 25px;font-size:clamp(15px,1.3vw,24px);font-weight:700}
.hp-step:first-child{clip-path:polygon(0 0,93% 0,100% 50%,93% 100%,0 100%);border-radius:12px 0 0 12px}.hp-step:nth-child(2){background:#2bb66d}.hp-step:nth-child(3){background:#a3e4ff;color:#00543a}.hp-step svg.lucide{width:35px;height:35px;stroke-width:3}
.hp-rays{position:absolute;right:-12px;top:0;width:25px;height:60px}.hp-rays b{width:20px;height:5px;border-radius:5px;background:#00975b;position:absolute;left:1px;top:28px}.hp-rays b:first-child{top:10px;transform:rotate(-28deg)}.hp-rays b:last-child{top:46px;transform:rotate(28deg)}
.hp-lessons{display:grid;grid-template-columns:repeat(var(--lesson-count),minmax(0,1fr));margin-top:28px;min-height:255px;padding:0 0 5px}
.hp-lesson{border-right:1px solid #d7eaf1;display:flex;flex-direction:column;padding:10px 25px 8px 26px;min-width:0;position:relative}
.hp-lesson:first-child{padding-left:4px}.hp-lesson:last-child{border-right:0;padding-right:0}
.hp-lessonheading{display:flex;align-items:flex-start;gap:14px;text-decoration:none;color:#003e2a;min-height:70px}
.hp-number{font-size:clamp(38px,3.2vw,60px);font-weight:850;line-height:1;letter-spacing:-3px;flex-shrink:0;color:#005039}
.hp-lessonheading h2{font-family:Outfit,Arial,sans-serif;font-size:clamp(14px,1.25vw,24px);font-weight:800;letter-spacing:-.55px;line-height:1.16;margin:10px 0 0;color:#003c2a}
.hp-lessonbody{display:grid;grid-template-columns:54% 46%;align-items:center;min-height:140px;flex:1;position:relative}
.hp-lessonbody p{font-family:Arial,sans-serif;font-size:clamp(12px,.99vw,18px);line-height:1.44;color:#585e6b;letter-spacing:-.3px;margin:5px 0 15px;position:relative;z-index:2}
.hp-lessonart{width:100%;height:auto;max-height:150px;object-fit:contain;align-self:end;margin-bottom:4px}
.hp-open{font-size:clamp(13px,1.1vw,20px);color:#009ff4;text-decoration:none;line-height:1.3;font-weight:650;display:flex;align-items:center;gap:13px;margin-top:14px;align-self:flex-start}
.hp-open span{font-family:Arial,sans-serif;font-size:1.45em;line-height:.8}.hp-open:hover{text-decoration:underline}.hp-lessonheading:hover h2{color:#009ff4}
.hp-footer{display:flex;justify-content:space-between;font-family:Outfit,Arial,sans-serif;color:#82899a;font-size:11px;margin:23px 0 0;letter-spacing:.25px}
.hp-intermediate .hp-lesson{padding-left:23px;padding-right:18px}.hp-intermediate .hp-lesson:first-child{padding-left:4px}.hp-intermediate .hp-number{font-size:clamp(36px,3vw,56px)}.hp-intermediate .hp-lessonheading{gap:12px}.hp-intermediate .hp-lessonheading h2{font-size:clamp(13px,1.18vw,22px)}.hp-intermediate .hp-lessonbody{grid-template-columns:52% 48%}.hp-intermediate .hp-source{line-height:1.58}
body.dark.homepage{--green:#89dab6;--ink:#d8eee4;--muted:#b2c1bd}
body.dark .hp-introtext h1,body.dark .hp-lessonheading h2,body.dark .hp-number{color:#a0e5c5}body.dark .hp-introtext p,body.dark .hp-eyebrow,body.dark .hp-lessonbody p{color:#b4c3c1}body.dark .hp-codewindow{border-color:#24816a}body.dark .hp-codebody{background:#1d3933}body.dark .hp-source{background:#182d28;color:#e8f6ef;border-color:#386354}body.dark .hp-output{background:#193b42;border-color:#3b6970;color:#e9f5f1}body.dark .hp-outputlabel,body.dark .hp-example{color:#c6d5d1}
@media(min-width:1700px){header .school{min-width:360px;font-size:24px}header{min-height:96px;padding:13px 35px;gap:23px}header .school img{width:61px;height:69px}header nav a{font-size:15px}header .switcher{font-size:12px}.homepage #app{padding-top:30px}}
@media(max-width:1500px){header .school{min-width:255px;font-size:17px}header .school img{width:45px;height:53px}header nav a{font-size:12px;gap:5px}header nav svg.lucide{width:23px;height:23px}header{gap:14px;padding:12px 23px;min-height:80px}.hp-eyebrow{font-size:11px;margin-bottom:27px}.hp-introtext h1{letter-spacing:-2.5px}.hp-introtext p{font-size:18px}.hp-start{gap:30px}.hp-process{height:50px;bottom:5px}.hp-step{gap:12px}.hp-step svg.lucide{width:28px;height:28px}.hp-codewindow{border-width:4px;border-radius:12px}.hp-windowbar{height:28px}.hp-windowbar i{width:11px;height:11px}.hp-codebody{padding:10px}.hp-source{padding:12px}.hp-outputlabel{font-size:13px;gap:12px}.hp-play{border-top-width:9px;border-bottom-width:9px;border-left-width:17px}.hp-result{padding-left:29px}.hp-example{margin-left:29px}.hp-output{padding:9px 12px}.hp-hero{height:clamp(360px,calc(100svh - 420px),500px)}.hp-lesson{padding:8px 18px}.hp-lessonheading{min-height:58px;gap:10px}.hp-lessonheading h2{margin-top:7px}.hp-lessons{min-height:230px;margin-top:20px}.hp-lessonbody{min-height:125px}.hp-lessonbody p{font-size:14px}.hp-lessonart{max-height:130px}.hp-intermediate .hp-lesson{padding-left:16px;padding-right:12px}.hp-intermediate .hp-lessonheading{gap:9px}}
@media(max-width:1200px){header{gap:10px;padding:9px 18px}header .school{min-width:222px;font-size:15px}header .school img{width:38px;height:44px}header nav a{font-size:10px;gap:4px}header nav svg.lucide{width:21px;height:21px}header .switcher{padding-left:8px;font-size:9px}header .toptools{padding-left:3px}.hp-introtext h1{font-size:48px;letter-spacing:-2px}.hp-introtext p{font-size:16px}.hp-hero{grid-template-columns:33% 67%;height:380px}.hp-source{font-size:11px}.hp-step{font-size:14px}.hp-art{width:130%;margin-left:-20%}.hp-lessonheading h2{font-size:15px}.hp-lessonbody p{font-size:12px}.hp-number{font-size:40px}.hp-lessonart{max-height:110px}.hp-lessonbody{min-height:125px}.hp-open{font-size:13px}.hp-intermediate .hp-lessonheading{flex-direction:column;gap:0;min-height:80px}.hp-intermediate .hp-lessonheading h2{margin-top:7px}.hp-intermediate .hp-lessonbody{grid-template-columns:1fr}.hp-intermediate .hp-lessonart{width:85px;height:85px;justify-self:end}.hp-intermediate .hp-lessonbody p{margin-bottom:0}.hp-lessons{min-height:230px}}
@media(max-width:950px){header{flex-wrap:wrap;min-height:0}header .school{min-width:240px;flex:1}header nav{order:3;flex-basis:100%;justify-content:space-between;gap:10px}header nav a{font-size:11px}header .switcher{font-size:10px}header .toptools{border:0}body.homepage #app{padding:25px 24px}.hp-hero{grid-template-columns:1fr;height:auto;gap:20px}.hp-introtext{padding:0}.hp-introtext h1{font-size:52px;margin-bottom:15px}.hp-introtext h1 span{display:inline;white-space:normal}.hp-introtext h1 span+span:before{content:' '}.hp-eyebrow{margin-bottom:20px}.hp-introtext p{font-size:17px;max-width:630px;margin-bottom:20px}.hp-start{font-size:23px;padding:12px 18px}.hp-scene{height:400px;grid-template-columns:35% 65%;max-width:900px}.hp-source{font-size:13px}.hp-codewindow{transform:translateY(-20px)}.hp-art{max-height:95%;width:117%;margin-left:-10%;margin-bottom:40px}.hp-lessons{grid-template-columns:repeat(3,minmax(0,1fr));gap:25px 0;margin-top:25px}.hp-lesson:nth-child(3n){border:0}.hp-lessonheading h2,.hp-intermediate .hp-lessonheading h2{font-size:18px}.hp-number,.hp-intermediate .hp-number{font-size:43px}.hp-lessonheading,.hp-intermediate .hp-lessonheading{flex-direction:row;gap:10px;min-height:62px}.hp-lessonbody,.hp-intermediate .hp-lessonbody{grid-template-columns:54% 46%;min-height:125px}.hp-lessonart,.hp-intermediate .hp-lessonart{height:auto;width:100%;max-height:125px}.hp-lessonbody p{font-size:13px}.hp-open{font-size:15px}.hp-process{bottom:0}.hp-introtext h1{letter-spacing:-2px}.hp-footer{font-size:10px}}
@media(max-width:650px){header .school{font-size:13px;min-width:195px;gap:8px}header .school img{width:36px;height:41px}header{padding:9px 14px;gap:8px}header .switcher{font-size:9px;gap:4px;border:0;padding-left:0}header .switch{width:29px;height:18px;padding:3px}header .switch span{width:12px;height:12px}header .switch[aria-checked=true] span{transform:translateX(11px)}header .toptools{margin-left:auto}header nav{gap:12px;overflow-x:auto;justify-content:flex-start;scrollbar-width:thin}header nav a{font-size:10px;gap:4px;flex-direction:column;flex-shrink:0;padding:8px 0 6px}header nav svg.lucide{width:22px;height:22px}body.homepage #app{padding:24px 18px 15px}.hp-introtext h1{font-size:40px;line-height:1.08;letter-spacing:-1.5px}.hp-eyebrow{font-size:10px;letter-spacing:2px;margin-bottom:19px}.hp-eyebrow:after{margin-top:10px;height:4px;width:45px}.hp-introtext p{font-size:15px;letter-spacing:0}.hp-start{font-size:22px;gap:28px}.hp-scene{display:block;height:auto;padding:0 0 50px}.hp-art{display:block!important;width:180px;height:160px;max-height:none;object-fit:contain;margin:0 auto -5px}.hp-codewindow{transform:none;border-width:3px;width:100%;border-radius:9px}.hp-windowbar{height:25px}.hp-codebody{padding:7px}.hp-source{font-size:clamp(8px,2.25vw,12px);line-height:1.8;padding:10px 8px;letter-spacing:-.25px}.hp-output{padding:9px 8px;margin-top:7px}.hp-outputlabel{font-size:11px;gap:8px}.hp-play{border-top-width:7px;border-bottom-width:7px;border-left-width:12px}.hp-result{font-size:clamp(10px,3vw,15px);padding-left:20px;letter-spacing:-.3px}.hp-example{font-size:10px;margin-left:20px}.hp-process{left:0;right:10px;height:38px;bottom:0;padding-right:10px;gap:2px}.hp-step{padding:5px 8px;font-size:11px;gap:8px}.hp-step svg.lucide{width:20px;height:20px}.hp-rays{right:-12px;height:38px;width:20px}.hp-rays b{width:13px;height:3px;top:18px}.hp-rays b:first-child{top:5px}.hp-rays b:last-child{top:31px}.hp-lessons{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px 0;margin-top:30px}.hp-lesson,.hp-intermediate .hp-lesson{padding:0 14px!important}.hp-lesson:nth-child(odd){padding-left:0!important;border-right:1px solid #d7eaf1}.hp-lesson:nth-child(even){padding-right:0!important;border-right:0}.hp-lessonheading,.hp-intermediate .hp-lessonheading{min-height:65px;gap:9px}.hp-lessonheading h2,.hp-intermediate .hp-lessonheading h2{font-size:16px;margin-top:5px;letter-spacing:-.4px}.hp-number,.hp-intermediate .hp-number{font-size:35px;letter-spacing:-2px}.hp-lessonbody,.hp-intermediate .hp-lessonbody{grid-template-columns:1fr;min-height:172px}.hp-lessonbody p{font-size:12px;line-height:1.45;margin:0 0 5px}.hp-lessonart,.hp-intermediate .hp-lessonart{width:90px;height:90px;justify-self:end}.hp-open{font-size:14px;margin-top:8px}.hp-footer{gap:20px;margin-top:30px}.hp-footer span{text-align:right}}
/* The illustration, editor and process strip occupy separate layout rows. */
@media(min-width:951px){
 body.homepage #app{padding-top:28px;padding-bottom:18px}
 .hp-hero{height:auto;min-height:0;grid-template-columns:34% 66%;align-items:center}
 .hp-introtext{align-self:center;padding-bottom:20px}
 .hp-introtext h1{font-weight:800;letter-spacing:-1.8px;font-size:clamp(48px,4.4vw,84px)}
 .hp-introtext p{font-size:clamp(16px,1.18vw,22px);line-height:1.45;margin-bottom:25px;max-width:530px}
 .hp-start{font-weight:750;font-size:clamp(23px,1.75vw,33px);padding:12px 24px}
 .hp-eyebrow{margin-bottom:28px}
 .hp-scene{height:auto;min-height:0;grid-template-rows:auto auto;grid-template-columns:34% 66%;align-items:end;row-gap:12px;padding:0}
 .hp-art{grid-column:1;grid-row:1;width:132%;height:auto;max-height:420px;object-fit:contain;object-position:center bottom;margin:0 0 0 -22%;align-self:end}
 .hp-codewindow{grid-column:2;grid-row:1;align-self:start;transform:none;border-width:4px;border-radius:12px}
 .hp-windowbar{height:30px;padding-left:16px;gap:11px}.hp-windowbar i{width:11px;height:11px}
 .hp-codebody{padding:10px}.hp-source{font-size:clamp(11px,.94vw,18px);line-height:1.55;padding:14px 13px;letter-spacing:-.3px}
 .hp-intermediate .hp-source{line-height:1.5}
 .hp-output{margin-top:10px;padding:10px 14px}.hp-outputlabel{font-size:clamp(12px,.95vw,18px);margin-bottom:4px;gap:12px}
 .hp-play{border-top-width:9px;border-bottom-width:9px;border-left-width:17px}
 .hp-result{font-size:clamp(14px,1.23vw,23px);line-height:1.4;padding-left:29px}
 .hp-example{font-size:clamp(11px,.91vw,17px);margin-left:29px}
 .hp-process{position:relative;grid-column:1/-1;grid-row:2;left:auto;right:auto;bottom:auto;margin-left:22%;height:clamp(42px,3.3vw,60px);width:78%;padding-right:20px;min-width:0}
 .hp-step{font-size:clamp(14px,1.2vw,23px);gap:16px}.hp-step svg.lucide{width:clamp(23px,1.8vw,34px);height:clamp(23px,1.8vw,34px)}
 .hp-lessons{margin-top:36px;min-height:0}
 .hp-lesson{padding-top:8px;padding-bottom:4px}.hp-lessonheading{min-height:61px}
 .hp-number{font-weight:800;font-size:clamp(38px,3vw,56px);letter-spacing:-1.8px}
 .hp-lessonheading h2{font-weight:750;font-size:clamp(14px,1.15vw,22px);letter-spacing:-.4px;line-height:1.18;margin-top:8px}
 .hp-lessonbody{min-height:132px;grid-template-columns:55% 45%}
 .hp-lessonbody p{font-size:clamp(12px,.91vw,17px);line-height:1.43;letter-spacing:-.2px;margin-bottom:10px}
 .hp-lessonart{height:clamp(90px,7vw,132px);max-height:132px;width:100%;object-fit:contain}
 .hp-open{margin-top:12px;font-size:clamp(13px,1vw,19px)}
 .hp-intermediate .hp-lessonheading{flex-direction:row;min-height:65px;gap:10px}
 .hp-intermediate .hp-lessonheading h2{font-size:clamp(13px,1.08vw,21px)}
 .hp-intermediate .hp-number{font-size:clamp(35px,2.8vw,53px)}
 .hp-intermediate .hp-lessonbody{grid-template-columns:53% 47%;min-height:132px}
 .hp-intermediate .hp-lessonart{width:100%;height:clamp(85px,6.5vw,125px)}
 .hp-footer{margin-top:23px}
}
@media(min-width:951px) and (max-height:850px){
 .hp-introtext h1{font-size:clamp(44px,4.1vw,72px)}.hp-eyebrow{margin-bottom:22px;font-size:11px}.hp-eyebrow:after{margin-top:11px;height:5px}.hp-start{font-size:25px;padding:11px 21px}.hp-introtext p{font-size:17px;margin-bottom:22px}
 .hp-art{max-height:330px}.hp-source{font-size:clamp(11px,.88vw,16px);padding:11px 12px;line-height:1.5}.hp-intermediate .hp-source{line-height:1.42}
 .hp-output{padding:8px 11px}.hp-result{font-size:18px}.hp-example{font-size:13px}.hp-outputlabel{font-size:13px}.hp-windowbar{height:26px}
 .hp-process{height:44px}.hp-step{font-size:17px}.hp-step svg.lucide{width:25px;height:25px}
 .hp-lessons{margin-top:29px}.hp-lessonheading,.hp-intermediate .hp-lessonheading{min-height:57px}.hp-lessonbody,.hp-intermediate .hp-lessonbody{min-height:117px}.hp-lessonbody p{font-size:13px}.hp-lessonart,.hp-intermediate .hp-lessonart{height:105px}.hp-open{font-size:15px}
}
@media(min-width:951px){
 .hp-introtext h1{font-size:clamp(49px,5.15vw,100px);letter-spacing:-2px}
 .hp-introtext p{color:#686082}.hp-eyebrow{color:#7a739c}
 .hp-source{font-size:clamp(11px,1.02vw,19px)}
 header .school{border-right:1px solid #37745f;padding-right:18px}
}
@media(min-width:951px) and (max-height:850px){
 .hp-introtext h1{font-size:clamp(46px,5.05vw,94px)}
 .hp-source{font-size:clamp(11px,1.02vw,18px)}
}
@media(min-width:951px){
 .hp-intro .hp-hero{grid-template-columns:32% 68%}
 .hp-intro .hp-scene{grid-template-columns:34% 66%}
 .hp-intro .hp-introtext p{max-width:475px}
 .hp-intermediate .hp-introtext p{max-width:475px}
 .hp-start{gap:30px;border-radius:8px}
 .hp-lessonheading h2,.hp-intermediate .hp-lessonheading h2{font-weight:750}
}
/* One reference geometry for both units. Content never controls the hero height. */
.unit-selector{display:inline-flex;flex-shrink:0;align-items:stretch;border:1px solid #a8d8d3;border-radius:6px;overflow:hidden;font:500 10px Outfit,Arial,sans-serif;margin-left:4px}
.unit-selector button{padding:6px 9px;background:#fff;color:#00543d;border:0;line-height:1.2;white-space:nowrap}
.unit-selector button.active{background:#079fff;color:white}.unit-selector button+button{border-left:1px solid #b9e5e3}.unit-selector button:focus-visible{outline-offset:-3px}
.hp-backdrop{position:absolute;right:-20px;top:4%;bottom:17%;width:120px;z-index:0;pointer-events:none;overflow:hidden}
.hp-backdrop span{position:absolute;right:-48px;top:4%;width:110px;height:250px;border-radius:80% 0 70% 0;background:#e2f7e8;transform:rotate(14deg)}
.hp-backdrop span:nth-child(2){top:48%;right:-26px;width:78px;height:145px;background:#36b7ef;transform:rotate(35deg)}
.hp-backdrop span:nth-child(3){top:70%;right:18px;width:80px;height:160px;background:#d7f4fb;transform:rotate(55deg)}
.hp-process{grid-template-columns:repeat(3,minmax(0,1fr))!important}
.hp-step{min-width:0;width:100%;height:100%;box-sizing:border-box;white-space:nowrap}
@media(min-width:951px){
 .hp-home{--hero-height:clamp(360px,26.5vw,510px);--panel-height:calc(var(--hero-height) - 66px);--heading-height:clamp(112px,10.4vw,200px)}
 .hp-hero,.hp-intro .hp-hero,.hp-intermediate .hp-hero{height:var(--hero-height);min-height:var(--hero-height);max-height:var(--hero-height);grid-template-columns:34% 66%;align-items:stretch}
 .hp-introtext{height:100%;display:grid;grid-template-rows:50px var(--heading-height) 74px 64px;gap:10px;align-content:center;align-self:stretch;padding:0 24px 0 0;min-height:0}
 .hp-eyebrow{margin:0;font-size:clamp(11px,.75vw,14px);align-self:start}.hp-eyebrow:after{margin-top:12px;height:5px}
 .hp-introtext h1{margin:0;font-size:clamp(48px,5vw,96px);line-height:1.03;letter-spacing:-2px;align-self:center}
 .hp-introtext p,.hp-intro .hp-introtext p,.hp-intermediate .hp-introtext p{margin:0;font-size:clamp(16px,1.15vw,22px);line-height:1.45;max-width:500px;align-self:start}
 .hp-start{align-self:start;justify-self:start;font-size:clamp(24px,1.7vw,32px);padding:12px 24px;line-height:1.25;font-weight:750;min-height:54px}
 .hp-scene,.hp-intro .hp-scene,.hp-intermediate .hp-scene{height:var(--hero-height);min-height:0;display:grid;grid-template-columns:34% 66%;grid-template-rows:var(--panel-height) 52px;gap:14px 0;align-items:stretch;position:relative}
 .hp-art{grid-row:1;grid-column:1;align-self:end;justify-self:center;width:132%;height:100%;max-height:100%;object-fit:contain;object-position:center bottom;margin:0 0 0 -20%;z-index:1}
 .hp-codewindow{grid-row:1;grid-column:2;height:var(--panel-height);min-height:0;max-height:var(--panel-height);align-self:stretch;transform:none;display:grid;grid-template-rows:28px minmax(0,1fr);border:4px solid #00543c;border-radius:12px}
 .hp-windowbar{height:28px;gap:10px;padding:0 14px}.hp-windowbar i{width:11px;height:11px}
 .hp-codebody{display:grid;grid-template-rows:minmax(0,1fr) 90px;gap:9px;padding:10px;min-height:0;background:linear-gradient(110deg,#fff,#eef9fe)}
 .hp-source,.hp-intermediate .hp-source{font-size:clamp(11px,.94vw,18px);line-height:1.4;padding:10px 12px;margin:0;height:100%;min-height:0;overflow:auto;border-color:#bde3f5;border-radius:5px;background:#fff;align-self:stretch}
 .hp-output{height:90px;min-height:0;margin:0;padding:7px 12px;display:grid;grid-template-columns:1fr;grid-template-rows:20px 1fr 17px;border:1px solid #bde3f5;overflow:hidden}
 .hp-outputlabel{margin:0;font-size:clamp(11px,.9vw,16px);line-height:20px;gap:12px}.hp-play{border-top-width:8px;border-bottom-width:8px;border-left-width:15px}
 .hp-result{font-size:clamp(13px,1.12vw,21px);line-height:1.23;align-self:center;padding-left:27px;letter-spacing:-.3px}
 .hp-example{font-size:clamp(10px,.84vw,16px);line-height:17px;margin:0 0 0 27px;align-self:end}
 .hp-process{position:relative;grid-row:2;grid-column:1/-1;align-self:stretch;height:52px;min-height:52px;max-height:52px;margin:0 0 0 22%;width:78%;padding-right:20px;left:auto;right:auto;bottom:auto;gap:4px}
 .hp-step,.hp-step:first-child,.hp-step:nth-child(2),.hp-step:nth-child(3){padding:7px 10px;gap:15px;font-size:clamp(14px,1.18vw,22px);line-height:1;height:52px;min-height:52px;max-height:52px}
 .hp-step svg.lucide{width:clamp(24px,1.7vw,32px);height:clamp(24px,1.7vw,32px);flex-shrink:0}
 .hp-rays{height:52px}.hp-rays b{top:24px}.hp-rays b:first-child{top:8px}.hp-rays b:last-child{top:40px}
 .hp-lessons{margin-top:28px;min-height:0;height:clamp(225px,14.7vw,280px);max-height:280px;align-items:stretch}
 .hp-lesson,.hp-intermediate .hp-lesson{display:grid;grid-template-rows:61px minmax(0,1fr) 27px;gap:5px;min-height:0;padding-top:8px;padding-bottom:4px}
 .hp-lessonheading,.hp-intermediate .hp-lessonheading{height:61px;min-height:61px;margin:0;align-items:flex-start;flex-direction:row}
 .hp-lessonheading h2,.hp-intermediate .hp-lessonheading h2{font-size:clamp(14px,1.1vw,21px);line-height:1.16;min-width:0;margin-top:7px}
 .hp-number,.hp-intermediate .hp-number{font-size:clamp(37px,2.9vw,55px);letter-spacing:-2px;font-weight:800}
 .hp-lessonbody,.hp-intermediate .hp-lessonbody{display:grid;grid-template-columns:53% 47%;height:100%;min-height:0;align-items:center}
 .hp-lessonbody p{font-size:clamp(12px,.87vw,16px);line-height:1.42;margin:0;align-self:start;padding-top:7px}
 .hp-lessonart,.hp-intermediate .hp-lessonart{height:100%;width:100%;max-height:140px;min-height:0;object-fit:contain;object-position:center bottom;align-self:end;margin:0}
 .hp-open{height:27px;align-self:end;margin:0;font-size:clamp(13px,1vw,19px)}
 .hp-footer{margin-top:18px}
}
@media(min-width:951px) and (max-height:820px){
 .hp-home{--hero-height:clamp(345px,25.3vw,445px);--heading-height:clamp(108px,10vw,175px)}
 .hp-introtext{grid-template-rows:42px var(--heading-height) 63px 54px;gap:8px}
 .hp-introtext h1{font-size:clamp(47px,4.85vw,89px)}
 .hp-introtext p,.hp-intro .hp-introtext p,.hp-intermediate .hp-introtext p{font-size:17px}
 .hp-start{font-size:26px;padding:10px 22px}
 .hp-codebody{grid-template-rows:minmax(0,1fr) 82px;padding:8px;gap:8px}
 .hp-output{height:82px;padding:6px 10px;grid-template-rows:18px 1fr 15px}
 .hp-source,.hp-intermediate .hp-source{font-size:clamp(10px,.87vw,15px);line-height:1.36;padding:9px 10px}
 .hp-example{font-size:12px;line-height:15px}.hp-result{font-size:17px}.hp-outputlabel{font-size:12px}
 .hp-lessons{height:225px}.hp-lessonbody p{font-size:12px}.hp-open{font-size:14px}
}
@media(max-width:950px){.hp-backdrop{display:none}.unit-selector{font-size:10px}.unit-selector button{padding:6px 8px}}
@media(max-width:650px){.unit-selector{font-size:9px}.unit-selector button{padding:5px 7px}.hp-step{min-width:0;gap:7px}}
@media(max-width:950px){
 .hp-introtext{display:grid;grid-template-rows:48px 116px 58px 54px;gap:9px;padding:0;align-content:start}
 .hp-introtext h1{margin:0;align-self:center;line-height:1.05;font-size:50px}.hp-introtext h1 span{display:block;white-space:nowrap}.hp-introtext h1 span+span:before{content:none}
 .hp-eyebrow{margin:0}.hp-introtext p{margin:0;align-self:start;max-width:600px}.hp-start{justify-self:start;align-self:start}
 .hp-scene{height:400px;grid-template-rows:334px 52px;row-gap:14px}
 .hp-codewindow{height:334px;transform:none;display:grid;grid-template-rows:27px minmax(0,1fr)}
 .hp-codebody{height:100%;min-height:0;display:grid;grid-template-rows:minmax(0,1fr) 86px;gap:8px;padding:8px}
 .hp-source,.hp-intermediate .hp-source{height:100%;min-height:0;line-height:1.4;padding:10px;font-size:12px;overflow:auto}
 .hp-output{height:86px;margin:0;padding:7px 10px;display:grid;grid-template-rows:18px 1fr 15px;overflow:hidden}
 .hp-outputlabel{font-size:12px;margin:0;line-height:18px}.hp-result{font-size:16px;line-height:1.25;align-self:center}.hp-example{font-size:11px;line-height:15px;margin-top:0}
 .hp-process{height:52px;bottom:0;grid-template-columns:repeat(3,minmax(0,1fr))}.hp-step{height:52px}
}
@media(max-width:650px){
 .hp-introtext{grid-template-rows:42px 90px 65px 51px;gap:8px}.hp-introtext h1{font-size:38px;line-height:1.06;letter-spacing:-1.5px}.hp-introtext p{font-size:15px}.hp-start{font-size:22px}
 .hp-scene{height:510px;padding:0 0 52px;display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:160px 290px;gap:8px}
 .hp-art{grid-column:1;grid-row:1;height:160px;max-height:160px;width:180px;margin:0;justify-self:center}
 .hp-codewindow{grid-column:1;grid-row:2;height:290px;width:100%;min-height:0;display:grid;grid-template-rows:25px minmax(0,1fr)}
 .hp-source,.hp-intermediate .hp-source{font-size:clamp(8px,2.25vw,12px);line-height:1.65;padding:10px 8px}
 .hp-output{height:80px;grid-template-rows:16px 1fr 14px;padding:7px 8px}.hp-codebody{grid-template-rows:minmax(0,1fr) 80px}
 .hp-outputlabel{font-size:11px;line-height:16px}.hp-result{font-size:clamp(10px,3vw,15px)}.hp-example{font-size:10px;line-height:14px}
 .hp-process{position:absolute;left:0;right:10px;bottom:0;height:38px}.hp-step{height:38px;min-height:38px;max-height:38px;font-size:11px}
}
@media(min-width:951px){.hp-codebody{grid-template-rows:minmax(0,1fr) 110px}.hp-output{height:110px}}
@media(min-width:951px) and (max-height:820px){.hp-codebody{grid-template-rows:minmax(0,1fr) 92px}.hp-output{height:92px}}
@media(min-width:651px) and (max-width:950px){.hp-codebody{grid-template-rows:minmax(0,1fr) 90px}.hp-output{height:90px}}
@media(max-width:650px){.hp-result{font-size:clamp(10px,3vw,14px);line-height:1.2}}
/* Introduction is the master frame: both units inherit these same coordinates. */
@media(min-width:951px){
 .hp-hero,.hp-intro .hp-hero,.hp-intermediate .hp-hero{grid-template-columns:32% 68%}
 .hp-introtext h1{font-size:clamp(48px,4.8vw,92px)}
 .hp-scene,.hp-intro .hp-scene,.hp-intermediate .hp-scene{grid-template-columns:34% 66%}
 .hp-process{grid-column:2;grid-row:2;width:100%;margin:0;padding:0;grid-template-columns:repeat(3,minmax(0,1fr))!important}
 .hp-rays{right:-25px}
}
@media(min-width:651px) and (max-width:950px){.hp-process{left:35%;right:0;width:65%;margin:0;padding:0;grid-template-columns:repeat(3,minmax(0,1fr))!important}}
@media(max-width:650px){.hp-process{left:0;right:0;width:100%;margin:0;padding:0;grid-template-columns:repeat(3,minmax(0,1fr))!important}.hp-rays{right:-15px}}
.hp-codewindow.graphic-window{border:0!important;background:transparent!important;overflow:visible;border-radius:0;isolation:isolate}
.hp-codegraphic{position:absolute;inset:0;width:100%;height:100%;object-fit:fill;display:block;z-index:2}
.hp-codewindow.graphic-window>.hp-windowbar,.hp-codewindow.graphic-window>.hp-codebody{position:absolute!important;top:0;left:0;width:1px!important;height:1px!important;padding:0!important;overflow:hidden!important;clip-path:inset(50%);white-space:nowrap}
.nav-graphic{width:27px;height:27px;object-fit:contain;flex-shrink:0}.active .nav-graphic{filter:none}
.hp-stepgraphic{width:32px;height:32px;object-fit:contain;flex-shrink:0}
@media(max-width:1500px){.nav-graphic{width:23px;height:23px}.hp-stepgraphic{width:28px;height:28px}}
@media(max-width:950px){.nav-graphic{width:21px;height:21px}.hp-stepgraphic{width:26px;height:26px}}
@media(max-width:650px){.hp-stepgraphic{width:20px;height:20px}}
/* Each hero is one approved composite PNG; its internal components stay together. */
.combined-scene{display:block!important;position:relative}
.hp-combined-graphic{position:absolute;inset:0;display:block;width:100%;height:100%;object-fit:contain;object-position:center center;z-index:4}
.combined-scene>.hp-backdrop,.combined-scene>.hp-art,.combined-scene>.hp-codewindow,.combined-scene>.hp-process{position:absolute!important;left:0!important;top:0!important;width:1px!important;height:1px!important;max-height:1px!important;min-height:0!important;margin:0!important;padding:0!important;overflow:hidden!important;clip-path:inset(50%);white-space:nowrap;pointer-events:none}
@media(max-width:950px){.combined-scene{height:auto!important;min-height:0!important;aspect-ratio:1200/560;padding:0!important}}