/* ===== Learn tab — all rules scoped under #learn so nothing leaks to other tabs ===== */
#learn{--wind:#5f9e8f;--solar:#e2b93b;--hydro:#2f7f86;--gas:#b7743a;--stor:#7a5cc0}
#learn.tab{padding:52px 4vw 80px}
#learn .section-heading{margin-bottom:20px}
#learn .wrap{max-width:1240px;margin:0 auto;padding:0}
#learn .lsec{padding:7vh 0}
#learn .ldiv{height:1px;background:var(--line)}
#learn .eyebrow{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--teal);font-weight:bold}
#learn h2{font:400 clamp(30px,4vw,48px)/1.1 Georgia,serif;margin:0 0 14px;letter-spacing:0}
#learn h2 em{font-family:Georgia,serif;color:var(--teal)}
#learn h3{font-size:23px;margin:0 0 8px;font-weight:600}
#learn p{font-size:17px;color:#3f5553;line-height:1.6}
#learn .lead{font-size:22px;max-width:820px;color:#425856;line-height:1.55;margin-top:8px}
#learn .part-tag{display:inline-block;margin-bottom:22px;padding:7px 14px;border:1px solid var(--line);
  border-radius:20px;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--teal)}

/* step-06 dispatch mini chart */
#learn .mini svg{max-width:150px;height:auto;margin:0 auto;display:block}
#learn .lp{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:14.5px;line-height:1.75;color:#26403e;
  background:#eef4f1;border:1px solid var(--line);border-radius:8px;padding:14px 16px;white-space:pre-wrap}
#learn .lp b{color:var(--teal)}
#learn .solve-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
#learn .mini{border:1px solid var(--line);border-radius:8px;padding:14px}
#learn .mini .t{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--teal);font-weight:bold;margin-bottom:10px}
#learn .mini.dark{background:var(--ink)}
#learn .mini.dark .t{color:var(--lime)}
#learn .mini.dark li{color:#eaf3ec}
#learn .mini ul{margin:0;padding-left:2px;list-style:none}
#learn .mini li{font-size:14px;display:flex;align-items:center;gap:8px;padding:4px 0}
#learn .mini li i{width:9px;height:9px;border-radius:50%;flex:0 0 9px}

#learn .caption{margin-top:16px;font-size:14px;color:#7a8a87;font-style:italic}
#learn .flow{stroke-dasharray:2 11;animation:learndash 2.2s linear infinite}
@keyframes learndash{to{stroke-dashoffset:-130}}
/* global (not #learn-scoped): must reach inside <use> shadow content */
.spin{transform-box:fill-box;transform-origin:center;animation:learnspin 9s linear infinite}
@keyframes learnspin{to{transform:rotate(360deg)}}

/* real vs model */
#learn .map2{display:grid;grid-template-columns:1fr 1fr;gap:26px;margin-top:10px}
#learn .mcard{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px;box-shadow:0 18px 46px rgba(11,37,40,.07)}
#learn .mcard h3{display:flex;align-items:center;gap:9px;font-size:20px}
#learn .mcard p{font-size:15px}
#learn .mcard svg{width:100%;height:auto}
#learn .map2 svg text{font-size:12px}
#learn .dot{width:10px;height:10px;border-radius:50%;display:inline-block}
#learn .maplist{margin-top:26px}
#learn .maprow{display:grid;grid-template-columns:1.05fr auto 1.55fr;gap:22px;align-items:center;
  padding:20px 4px;border-top:1px solid var(--line)}
#learn .maprow:last-child{border-bottom:1px solid var(--line)}
#learn .real{display:flex;align-items:center;gap:13px;font-weight:bold;color:var(--ink);font-size:17px}
#learn .real svg{width:46px;height:46px;flex:0 0 46px}
#learn .arrow{color:var(--teal);font-size:20px}
#learn .modeltxt{font-size:16.5px;color:#4a615e;line-height:1.55}
#learn .modeltxt code{background:var(--soft);padding:2px 6px;border-radius:4px;font-size:14px;color:var(--teal)}

/* comparison */
#learn .compare{display:grid;grid-template-columns:1fr 1fr;gap:26px;margin-top:10px}
#learn .ccard{background:#fff;border:1px solid var(--line);border-radius:12px;padding:24px;box-shadow:0 18px 46px rgba(11,37,40,.07)}
#learn .cardA{border-top:4px solid var(--teal)}
#learn .cardB{border-top:4px solid var(--gas)}
#learn .cardhead{display:flex;align-items:center;gap:10px;margin-bottom:6px}
#learn .pill{font-size:10px;letter-spacing:.1em;text-transform:uppercase;padding:4px 9px;border-radius:20px;color:#fff}
#learn .pillA{background:var(--teal)}
#learn .pillB{background:var(--gas)}
#learn .cmp-svg{width:100%;height:auto;margin:14px 0 6px}
#learn .cmp-svg text{font-size:12px}
#learn .zoom{margin-top:22px;background:linear-gradient(135deg,#eef4f1,#f6f3ea);border:1px solid var(--line);border-radius:12px;padding:22px 24px}
#learn .zoom svg{width:100%;height:auto;display:block;margin-bottom:10px}
#learn .zoom svg text{font-size:12px}
#learn .zoom p{font-size:16px}
#learn .zoom b{color:var(--teal)}
#learn table{width:100%;border-collapse:collapse;margin-top:34px;font-size:15.5px}
#learn th,#learn td{text-align:left;padding:15px 16px;border-bottom:1px solid var(--line);vertical-align:top}
#learn thead th{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--teal)}
#learn td:first-child{font-weight:bold;color:var(--ink);width:24%}
#learn .why{margin-top:34px;background:linear-gradient(135deg,rgba(230,244,237,.85),rgba(248,246,238,.75));
  border:1px solid var(--line);border-radius:12px;padding:30px}
#learn .why h3{font-size:24px}
#learn .why svg{width:100%;height:auto;display:block;margin:12px 0 22px}
#learn .why p{font-size:17.5px;line-height:1.7}
#learn .why p+p{margin-top:14px}
#learn .why .me{background:var(--ink);color:#eaf3ec;border-radius:10px;padding:16px 18px;margin-top:16px;font-size:16px}
#learn .why .me strong{color:var(--lime)}
#learn .legendrow{display:flex;flex-wrap:wrap;gap:14px;margin-top:12px;font-size:12.5px;color:#4a615e}
#learn .legendrow span{display:inline-flex;align-items:center;gap:6px}
#learn .sw{width:12px;height:12px;border-radius:3px;display:inline-block}

@media(max-width:860px){
  #learn .map2,#learn .compare{grid-template-columns:1fr}
  #learn .maprow{grid-template-columns:auto 1fr;gap:12px}
  #learn .maprow .arrow{display:none}
  #learn .maprow .modeltxt{grid-column:1 / -1}
  #learn td:first-child{width:34%}
}
@media(prefers-reduced-motion:reduce){
  #learn .flow,#learn .spin,#learn .sweep{animation:none}
}

/* ===== Part A · robust non-sticky layout (cannot overlap on any screen) ===== */
#learn .netfig{max-width:860px;margin:14px auto 34px;background:linear-gradient(160deg,#fff,#eef4ef);
  border:1px solid var(--line);border-radius:14px;padding:24px;box-shadow:0 24px 60px rgba(11,37,40,.10)}
#learn .netfig svg{width:100%;height:auto;max-height:62vh;display:block;margin:auto}
#learn .netfig svg text{font-size:12.5px}
#learn .netfig svg text[font-family="monospace"]{font-size:13px}
#learn .netfig figcaption{margin-top:12px;text-align:center;font-size:13.5px;color:#7a8a87;font-style:italic}
/* top-aligned cards of natural height (no stretched/floating figures) */
#learn .stepgrid{list-style:none;max-width:1120px;margin:26px auto 0;padding:0;display:grid;
  grid-template-columns:1fr 1fr;gap:22px;align-items:start}
#learn .stepcard{background:#fff;border:1px solid var(--line);border-radius:14px;padding:26px;
  display:flex;flex-direction:column;box-shadow:0 14px 36px rgba(11,37,40,.06)}
#learn .stepcard .n{font:700 clamp(32px,3vw,46px)/1 Georgia,serif;color:#b7c2bf;margin-bottom:2px}
#learn .stepcard h3{font-size:21px;margin:2px 0 8px}
#learn .stepcard>p{font-size:16.5px;line-height:1.62;margin:0}
#learn .stepfig{margin-top:16px;border-top:1px solid var(--line);padding-top:16px}
#learn .stepfig svg{width:100%;height:auto;max-height:152px;display:block;margin:auto}
#learn .stepfig svg text{font-size:12px}
/* reveal-on-scroll: only hides once JS marks the root, so no-JS still shows everything */
#learn .reveal{transition:opacity .6s ease,transform .6s ease}
#learn.reveal-on .reveal{opacity:0;transform:translateY(14px)}
#learn.reveal-on .reveal.in{opacity:1;transform:none}
@media(max-width:760px){#learn .stepgrid{grid-template-columns:1fr}#learn .netfig svg{max-height:none}}
@media(prefers-reduced-motion:reduce){#learn.reveal-on .reveal{opacity:1;transform:none;transition:none}}