/* The front door is a visual explanation; the full ledger stays one layer deeper. */
.home-learning{--learn-ink:#203e33;--learn-paper:#f5f4ed;--learn-border:#cbd0c2;--learn-muted:#5a6b61;background:var(--learn-paper)}
.home-learning>.wrap{max-width:1240px;padding-inline:32px}
.home-learning .home-nav{padding:14px 0;border-color:var(--learn-border);color:var(--learn-ink)}
.home-learning .home-nav a{color:inherit;font-size:13px}.home-learning .home-nav .brand{font-size:20px;font-weight:700;letter-spacing:-.045em}
.learning-home{color:var(--learn-ink);font-family:var(--sans);font-size:16px;line-height:1.5}
.learning-home *, .data-library{box-sizing:border-box}.learning-home button,.learning-home input,.learning-home select{font:inherit}
.learning-home button,.learning-home a{touch-action:manipulation}.learning-home button{cursor:pointer}.learning-home svg{display:block}
.learning-home a{color:inherit;text-underline-offset:4px}.learning-home button:focus-visible,.learning-home a:focus-visible,.learning-home input:focus-visible,.learning-home select:focus-visible,.learning-home summary:focus-visible{outline:3px solid #b65724;outline-offset:4px}
.learn-heading{display:flex;align-items:end;justify-content:space-between;gap:24px;padding:36px 0 28px}
.learn-heading h1{font:700 clamp(38px,5.2vw,64px)/1.03 var(--sans);letter-spacing:-.055em;margin:0;text-transform:none}
.learn-heading h1 em{font-style:normal;color:#6a7c4d}.learn-heading>p{font-size:16px;color:var(--learn-muted);line-height:1.6;margin:0 0 3px}
.learn-eyebrow{font:600 11px/1.5 var(--sans);letter-spacing:.12em;text-transform:uppercase;margin:0 0 15px;display:flex;gap:9px;align-items:center}
.learn-eyebrow>span{width:8px;height:8px;background:#87a74d;border-radius:50%}
.learn-tabs{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:12px}
.learn-tabs button{display:flex;align-items:center;gap:12px;min-height:60px;border:1px solid var(--learn-border);border-radius:12px;background:transparent;color:var(--learn-ink);text-align:left;padding:14px 20px;font-weight:600;font-size:17px;transition:background .18s,transform .18s}
.learn-tabs button>svg{width:23px;height:23px;flex:none}.tab-arrow{margin-left:auto;font-size:22px;font-weight:400;opacity:.5}
.learn-tabs button[data-topic=power][aria-pressed=true]{background:#ddebaf;border-color:#a3b570}
.learn-tabs button[data-topic=water][aria-pressed=true]{background:#cce8ef;border-color:#95bbc6}
.learn-tabs button[data-topic=community][aria-pressed=true]{background:#f0d8b9;border-color:#cba779}
.learn-tabs button:hover{transform:translateY(-2px);background:#e8ebdf}
.lesson-card{--lesson-bg:#e9efd9;--lesson-deep:#254936;--lesson-soft:#dce6c6;background:var(--lesson-bg);color:var(--lesson-deep);border:1px solid #c5cfb4;border-radius:20px;overflow:hidden}
.lesson-card[data-topic-tone=water]{--lesson-bg:#e0f0f2;--lesson-deep:#1b5266;--lesson-soft:#cce5e9;border-color:#bacfd5}
.lesson-card[data-topic-tone=community]{--lesson-bg:#f1e8d8;--lesson-deep:#573e2c;--lesson-soft:#e6dbc6;border-color:#d6c6ab}
.lesson-toolbar{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:16px 26px;border-bottom:1px solid color-mix(in srgb,var(--lesson-deep) 14%,transparent)}
.example-tag{font-size:12px;line-height:1.5}.example-tag>span{font-weight:600}
#learn-copy{background:transparent;border:0;display:flex;align-items:center;gap:12px;padding:7px 0;color:inherit;font-size:12px;min-height:32px;flex:none}
#learn-copy svg,.learning-home a>svg,.little-card button>svg{width:18px;height:18px}
.lesson-layout{display:grid;grid-template-columns:1fr 1.2fr;grid-template-areas:'copy scene' 'controls scene';gap:0 12px;padding:30px 30px 22px}
.lesson-copy{grid-area:copy;min-width:0;align-self:end}.lesson-kicker{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;margin:0 0 17px}
.lesson-lead{font-size:17px;margin:0 0 2px}.lesson-copy h2{margin:0;font-family:var(--sans);letter-spacing:-.05em;font-weight:600;line-height:1}
[data-learn-number]{font-size:clamp(58px,6.5vw,84px);font-variant-numeric:tabular-nums;display:block;letter-spacing:-.06em}
.lesson-unit{display:block;font-size:clamp(22px,2.5vw,31px);line-height:1.15;letter-spacing:-.035em;max-width:19ch;margin-top:8px}
.lesson-detail{font-size:12px;line-height:1.65;max-width:44ch;margin:14px 0 0;opacity:.83}
.learn-scene{grid-area:scene;align-self:center;min-width:0}.learn-scene>svg{width:100%;height:auto;overflow:visible}.scene-label{font:600 12px var(--sans);letter-spacing:.035em;fill:#23413a}.scene-percent{font:600 40px var(--sans);letter-spacing:-.05em}
.scene-footnote{display:block;text-align:center;font-size:10px;line-height:1.6;max-width:44ch;margin:0 auto;color:var(--lesson-deep);opacity:.78}
.lesson-controls{grid-area:controls;padding-top:25px;align-self:end;min-width:0}.control-heading{font-size:15px;font-weight:600;margin-bottom:10px}.control-heading em{font-style:normal;text-decoration:underline;text-underline-offset:3px}
.bill-input{display:flex;align-items:center;gap:10px;font-size:13px;flex-wrap:wrap}.bill-input>span{display:inline-flex;align-items:center;gap:8px}.bill-input input{width:102px;padding:10px 8px;background:#f9fbf3;border:1px solid #9baa8b;border-radius:8px;color:#23413a;font-size:17px;font-weight:600;min-height:44px}
.control-note{font-size:10px;line-height:1.6;margin:8px 0 10px;opacity:.8}.learn-segment{display:flex;flex-wrap:wrap;gap:5px}
.learn-segment button{background:transparent;color:inherit;border:1px solid color-mix(in srgb,currentColor 25%,transparent);border-radius:7px;padding:9px 11px;min-height:40px;font-size:12px;line-height:1.25;transition:background .15s,transform .15s}
.learn-segment button[aria-pressed=true]{background:var(--lesson-deep,#254936);border-color:transparent;color:#f7f9ed}
.learn-segment button:hover{transform:translateY(-1px)}.learn-error:empty{display:none}.learn-error{font-size:12px;color:#933c23;margin:8px 0 0}
.learn-scope{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:11px;margin-top:16px}.learn-scope .learn-segment button{font-size:11px;padding:7px 10px;min-height:36px}
.learn-air-action{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:600;margin-top:20px;min-height:36px}
.lesson-bottom{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:13px 26px;background:var(--lesson-soft);font-size:10px}
.lesson-bottom a{font-size:12px;font-weight:600;min-height:28px;display:flex;align-items:center}
.learn-status{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}
.learn-evidence{border-bottom:1px solid var(--learn-border);margin-bottom:40px;font-size:13px}
.learn-evidence>summary{list-style:none;display:flex;justify-content:space-between;align-items:center;cursor:pointer;padding:15px 4px;min-height:50px;font-size:12px;color:var(--learn-muted)}
.learn-evidence>summary::-webkit-details-marker,.data-library>summary::-webkit-details-marker{display:none}.learn-evidence summary>span{font-size:21px}.learn-evidence[open] summary>span{transform:rotate(45deg)}
#learn-sources{max-width:85ch;padding:0 4px 20px;color:var(--learn-muted);line-height:1.75}.example-select{display:flex;gap:15px;align-items:center;flex-wrap:wrap;margin:8px 4px 20px}.example-select select{max-width:100%;border:1px solid var(--learn-border);border-radius:6px;padding:10px;background:var(--learn-paper);color:var(--learn-ink)}
.little-heading{display:flex;justify-content:space-between;align-items:baseline;gap:20px;margin-bottom:18px}.little-heading h2{font:600 26px/1.2 var(--sans);letter-spacing:-.035em;margin:0}.little-heading p{font-size:12px;color:var(--learn-muted);margin:0}
.little-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.little-card{padding:26px 28px;border-radius:16px;border:1px solid var(--learn-border);background:#e8edf0;color:#25424e}
.mini-tag{font-size:10px;font-weight:600;letter-spacing:.08em;text-transform:uppercase}.little-card h3{font:600 34px/1.05 var(--sans);letter-spacing:-.045em;margin:18px 0 20px}
.return-visual{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:130px;margin:5px 0 25px}.return-tap{font-size:60px;font-weight:600;letter-spacing:-.07em;line-height:1}.return-tap span{display:block;font-size:12px;letter-spacing:0;margin-top:8px}.return-arrow{font-size:28px}
.return-dots{display:grid;grid-template-columns:repeat(10,1fr);gap:5px;width:180px;flex-shrink:0}.return-dots i{aspect-ratio:1;background:#4b8d9e;border-radius:50% 50% 50% 8%;transform:rotate(-45deg);transition:transform .5s,background .5s,opacity .5s}
.water-revealed .return-dots .returned{background:#f9fbfb;outline:1px solid #4b8d9e;transform:translateY(-8px) rotate(-45deg)}
.little-card>button{display:flex;justify-content:space-between;align-items:center;gap:12px;width:100%;border-radius:8px;border:1px solid #acbfc3;background:#f4f8f8;color:inherit;padding:12px 14px;font-size:13px;font-weight:500;min-height:45px}
#water-answer>p:first-child{font-size:17px;line-height:1.6;margin-top:20px}.mini-note{font-size:11px;line-height:1.65;opacity:.82}.little-card a{font-size:12px;min-height:32px;display:inline-flex;align-items:center}
.planned-card{background:#eeeadd;color:#514734;--lesson-deep:#514734}.plan-visual{display:flex;gap:13px;height:98px;align-items:center;margin:8px 0 17px}.plan-visual>svg{width:calc((100% - 52px)/5);max-height:90px;overflow:visible;opacity:.6;transition:opacity .45s}.plan-on .plan-visual>svg{opacity:1}.plan-on .plan-visual .town-house path:first-child{fill:#fff8d5}.plan-on .plan-visual .town-house path:nth-child(3){fill:#ffbd37}.plan-number{display:flex;align-items:center;gap:15px;margin:20px 0 10px}.plan-number strong{font-size:38px;font-weight:600;letter-spacing:-.06em;line-height:1}.plan-number>span{font-size:11px;line-height:1.5;max-width:14ch}
.learn-return{margin:36px 0 30px;border-radius:18px;background:#244535;color:#f2f5e7;padding:36px 40px;display:grid;grid-template-columns:1fr 1fr;gap:50px;overflow:hidden}
.learn-return h2{font:600 38px/1.08 var(--sans);letter-spacing:-.04em;margin:17px 0}.learn-return p{font-size:14px;max-width:35ch;color:#d1ddcc}.learn-return a{display:inline-flex;align-items:center;gap:24px;background:#deecaa;border-radius:8px;color:#203e33;text-decoration:none;padding:12px 17px;font-size:14px;font-weight:600;min-height:46px}.learn-return small{display:block;font-size:10px;margin-top:10px;color:#cadbc2}
.saved-illustration{display:flex;flex-direction:column;justify-content:center;gap:16px;transform:rotate(-5deg);padding:5px 15px}.saved-illustration>div{background:#f0f2e5;color:#244535;border:1px solid #b8caab;border-radius:10px;padding:23px 25px;box-shadow:0 10px 0 #173b2b}.saved-illustration>div:last-child{margin-left:30px;background:#dbe6c8}.saved-illustration span{font-size:9px;letter-spacing:.1em;display:block}.saved-illustration b{display:block;font-weight:600;font-size:20px;line-height:1.3;margin:12px 0 8px;letter-spacing:-.025em}.saved-illustration i{display:block;font-size:11px;font-style:normal}
.data-library{border-block:1px solid var(--learn-border);scroll-margin-top:16px}.data-library>summary{display:grid;grid-template-columns:1fr auto;gap:5px 20px;list-style:none;cursor:pointer;padding:24px 4px;color:var(--learn-ink)}.data-library>summary>span{font-size:11px;color:var(--learn-muted)}.data-library>summary strong{grid-column:1;font-size:18px;font-weight:500;line-height:1.4}.data-library>summary b{grid-column:2;grid-row:1/3;align-self:center;font-size:30px;font-weight:400}.data-library[open]>summary b{transform:rotate(45deg)}.data-library[open]>summary{margin-bottom:20px}
.home-learning .foot{border:0;margin-top:10px}.home-learning .foot p{font-family:var(--sans);font-size:10px;line-height:1.8}
/* Short bursts of feedback, with no endlessly running motion. */
.power-line{animation:learn-current .75s linear 3}.power-spark{animation:learn-pop .6s both}.rack-light{animation:learn-light .7s calc(var(--i)*.04s) 2}.pool-float{animation:learn-bob 1.3s ease-in-out 2}.pool-ripple{animation:learn-light 1.2s 2}
@keyframes learn-current{to{stroke-dashoffset:-32}}@keyframes learn-pop{0%{opacity:0;scale:.8}100%{opacity:1;scale:1}}@keyframes learn-light{50%{opacity:.35}}@keyframes learn-bob{50%{translate:0 -5px}}
@media(max-width:900px){.home-learning>.wrap{padding-inline:22px}.learn-heading>p{font-size:13px}.lesson-layout{padding:25px 24px 20px;grid-template-columns:1fr 1fr}.learn-tabs button{font-size:15px;padding:12px 15px}.lesson-toolbar{padding:12px 22px}.lesson-controls{padding-top:20px}[data-learn-number]{font-size:64px}.learn-return{padding:30px;gap:25px}.return-dots{width:150px;gap:4px}.return-visual{gap:10px}.little-card{padding:24px}.little-card h3{font-size:30px}.saved-illustration{padding:0}.saved-illustration>div{padding:20px}}
@media(max-width:650px){.home-learning>.wrap{padding-inline:16px}.home-learning .home-nav{padding:10px 0;gap:12px}.home-learning .home-nav .brand{font-size:17px}.home-learning .home-nav>a:not(.brand){font-size:12px}.learn-heading{padding:27px 0 23px;display:block}.learn-heading h1{font-size:clamp(34px,7.9vw,49px)}.learn-heading>p{display:none}.learn-eyebrow{font-size:10px;margin-bottom:13px}.learn-tabs{gap:6px;margin-bottom:9px}.learn-tabs button{padding:11px 10px;min-height:57px;font-size:12px;gap:7px;border-radius:9px}.learn-tabs button>svg{width:18px;height:18px}.tab-arrow{display:none}.lesson-card{border-radius:14px}.lesson-toolbar{padding:10px 16px;gap:10px;flex-wrap:wrap}.example-tag{font-size:10px;flex:1 1 190px}#learn-copy{font-size:10px;min-height:30px;gap:5px}#learn-copy svg{width:13px;height:13px}.lesson-layout{grid-template-columns:1fr;grid-template-areas:'copy' 'scene' 'controls';padding:22px 19px 20px;gap:0}.lesson-kicker{font-size:10px;margin-bottom:12px}.lesson-lead{font-size:15px}[data-learn-number]{font-size:66px}.lesson-unit{font-size:26px;max-width:100%;margin-top:5px}.lesson-detail{font-size:11px;margin-top:11px;max-width:100%}.learn-scene{margin:7px auto 0;width:100%;max-width:410px}.learn-scene>svg{max-height:230px}.scene-footnote{font-size:9px}.lesson-controls{padding-top:22px}.control-heading{font-size:14px}.bill-input{font-size:12px}.bill-input input{font-size:16px}.learn-segment button{min-height:42px;font-size:11px;padding:9px 11px}.control-note{font-size:10px}.lesson-bottom{padding:10px 17px;font-size:9px;gap:10px}.lesson-bottom>span{max-width:24ch}.lesson-bottom a{font-size:11px;white-space:nowrap}.learn-evidence{margin-bottom:30px}.learn-evidence>summary{font-size:11px}.little-heading{display:block;margin-bottom:17px}.little-heading h2{font-size:25px;max-width:20ch}.little-heading p{margin-top:8px;font-size:11px}.little-grid{grid-template-columns:1fr;gap:15px}.little-card{padding:25px}.little-card h3{font-size:34px}.return-visual{gap:18px}.return-dots{width:160px}.learn-return{grid-template-columns:1fr;padding:28px;gap:22px;margin-block:28px}.learn-return h2{font-size:36px}.learn-return p{font-size:13px}.saved-illustration{padding:10px 0 14px;gap:12px}.saved-illustration>div{padding:20px}.saved-illustration>div:last-child{margin-left:20px}.saved-illustration b{font-size:18px}.data-library>summary strong{font-size:16px}.home-learning .foot p{font-size:10px}.example-select{font-size:12px}}
@media(max-width:360px){.home-learning>.wrap{padding-inline:12px}.learn-tabs button{font-size:11px;padding-inline:8px;gap:5px}.learn-tabs button>svg{width:16px;height:16px}.return-dots{width:134px}.return-tap{font-size:51px}.lesson-layout{padding-inline:16px}[data-learn-number]{font-size:59px}.lesson-unit{font-size:23px}.plan-number strong{font-size:34px}}
:root[data-theme=dark] .home-learning{--learn-paper:#17241e;--learn-ink:#e6ecdc;--learn-border:#425248;--learn-muted:#b6c3ae}
:root[data-theme=dark] .learn-heading h1 em{color:#a6bf79}:root[data-theme=dark] .learn-tabs button[aria-pressed=true]{color:#23413a}:root[data-theme=dark] .learn-tabs button:hover{background:#364b3d}:root[data-theme=dark] .learn-tabs button[aria-pressed=true]:hover{background:#ddebaf}
@media(prefers-color-scheme:dark){:root:not([data-theme=light]) .home-learning{--learn-paper:#17241e;--learn-ink:#e6ecdc;--learn-border:#425248;--learn-muted:#b6c3ae}:root:not([data-theme=light]) .learn-heading h1 em{color:#a6bf79}:root:not([data-theme=light]) .learn-tabs button[aria-pressed=true]{color:#23413a}:root:not([data-theme=light]) .learn-tabs button:hover{background:#364b3d}:root:not([data-theme=light]) .learn-tabs button[aria-pressed=true]:hover{background:#ddebaf}}
@media(prefers-reduced-motion:reduce){.learning-home *{animation:none!important;transition:none!important;scroll-behavior:auto!important}.learn-tabs button:hover,.learn-segment button:hover{transform:none}}
@media print{.learning-home button,.lesson-controls,.learn-return,.learn-evidence,.data-library,.learn-tabs{display:none}.lesson-layout{display:block}.learn-scene{max-width:400px}.learning-home,.lesson-card{color:#111;background:white}.little-grid{display:block}.little-card{break-inside:avoid}.home-learning>.wrap{max-width:none}}
/* Keep the smallest phone widths from inheriting a teaching card's min-content width. */
.little-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.little-card{min-width:0}.return-dots{flex-shrink:1;min-width:110px}
@media(max-width:650px){.little-grid{grid-template-columns:minmax(0,1fr)}}
@media(max-width:360px){.little-card{padding:21px}.return-visual{gap:12px}.plan-number strong{font-size:30px}.plan-number{gap:10px}.little-card h3{font-size:31px}}