/* ToolsForModels Learning — editorial, mobile-first. */
.learning-page{background:#fbfafc;color:#14172a}.learning-site-header{position:relative}.learning-site-header .desktop-nav .is-current{color:#6c55f7}.reading-progress{position:fixed;z-index:50;top:0;left:0;right:0;height:2px;pointer-events:none}.reading-progress i{display:block;height:100%;width:0;background:currentColor;color:#6c55f7}.learning-narrow{max-width:980px}.learning-reading{max-width:760px}.learning-home-hero{padding:clamp(56px,9vw,112px) 0 72px}.learning-home-hero h1,.learning-hero h1{font-family:var(--serif);font-weight:500;letter-spacing:-.045em;line-height:.98;margin:12px 0 22px;font-size:clamp(44px,7.4vw,94px);max-width:1000px}.learning-home-lead,.learning-lead{font-size:clamp(18px,2.1vw,25px);line-height:1.48;max-width:820px;color:#4b4f63}.learning-door-list{margin-top:54px;border-top:1px solid var(--line)}.learning-door-list a{display:flex;align-items:center;justify-content:space-between;padding:17px 0;border-bottom:1px solid var(--line);font:600 clamp(19px,2.2vw,27px)/1.25 var(--sans);color:var(--ink);text-decoration:none}.learning-door-list a:hover span{color:var(--violet)}.learning-door-list b{font-weight:400;color:var(--violet)}.learning-paths{padding:24px 0 88px}.learning-kicker{display:flex;justify-content:space-between;gap:20px;border-bottom:2px solid var(--ink);padding-bottom:12px;margin-bottom:0}.learning-kicker span{font-weight:800;text-transform:uppercase;letter-spacing:.1em;font-size:12px}.learning-kicker p{margin:0;color:#777b8c;font-size:12px}.learning-path-row{display:grid;grid-template-columns:54px 1fr auto;gap:18px;align-items:start;padding:28px 2px;border-bottom:1px solid var(--line);text-decoration:none;color:inherit}.learning-path-row small,.lesson-row small{font-weight:800;color:var(--violet);letter-spacing:.08em}.learning-path-row h3{font-family:var(--serif);font-size:clamp(26px,3.6vw,42px);line-height:1.05;font-weight:500;margin:0 0 8px}.learning-path-row p{margin:0;max-width:720px;color:#5f6272;line-height:1.5}.learning-path-row b,.lesson-row b{font-size:24px;font-weight:400}.learning-popular{padding:72px 0 96px;background:#171827;color:white}.learning-popular h2{font:500 clamp(34px,5vw,60px)/1 var(--serif);margin:10px 0 34px}.popular-prompts{display:flex;flex-wrap:wrap;gap:10px}.popular-prompts button{appearance:none;border:1px solid #404253;background:transparent;color:white;padding:12px 15px;border-radius:999px;font:600 14px/1.2 var(--sans);cursor:pointer}.popular-prompts button:hover{border-color:#fff}.learning-hero{padding:50px 0 42px}.back-link{display:inline-block;color:#6a6d7d;text-decoration:none;margin-bottom:28px}.learning-meta{display:flex;flex-wrap:wrap;gap:12px 24px;margin:28px 0 0;color:#777b8c;font-size:13px}.learning-state{display:flex;gap:8px;margin-top:22px}.text-action{appearance:none;background:transparent;border:1px solid var(--line);border-radius:999px;padding:8px 12px;font:700 12px/1 var(--sans);color:var(--ink);cursor:pointer}.text-action.is-on{border-color:var(--violet);color:var(--violet)}.learning-list{padding:12px 0 100px}.lesson-row{display:grid;grid-template-columns:45px 1fr auto;gap:16px;align-items:center;padding:19px 0;border-bottom:1px solid var(--line);text-decoration:none;color:inherit;font-weight:700;font-size:clamp(17px,2vw,21px)}.learning-article{padding:4px 0 90px}.learning-article p{font-size:clamp(17px,1.8vw,20px);line-height:1.72;margin:0 0 26px;color:#303344}.learning-article h2{font:500 clamp(29px,4vw,46px)/1.06 var(--serif);letter-spacing:-.025em;margin:58px 0 18px}.tool-line{margin:48px 0 12px;padding:17px 0;border-top:2px solid var(--ink);border-bottom:1px solid var(--line);display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center}.tool-line span{font-size:11px;text-transform:uppercase;letter-spacing:.12em;font-weight:800;color:#777b8c}.tool-line a{font-weight:800;color:var(--violet);text-decoration:none}.source-line{font-size:13px!important;color:#787b89!important}.source-line a{color:inherit}.city-data{margin:38px 0 22px;display:grid;grid-template-columns:auto 1fr;gap:20px;align-items:start;padding:24px 0;border-top:2px solid var(--ink);border-bottom:1px solid var(--line)}.city-data strong{font:500 clamp(58px,8vw,92px)/.85 var(--serif);color:var(--violet)}.city-data span{max-width:680px;font-size:16px;line-height:1.5;color:#46495a}.learning-question{max-width:760px;margin:0 auto 100px;padding:42px clamp(18px,4vw,42px);background:#fff;border:1px solid var(--line);border-radius:24px}.learning-question h2{font:500 clamp(30px,4vw,46px)/1 var(--serif);margin:8px 0 12px}.learning-question>p:not(.eyebrow){color:#606373;line-height:1.55}.learning-question textarea{width:100%;min-height:118px;resize:vertical;border:1px solid #d9d7e1;border-radius:15px;background:#fbfafc;color:var(--ink);padding:15px;font:500 16px/1.45 var(--sans);margin:18px 0 12px;box-sizing:border-box}.learning-question textarea:focus{outline:2px solid rgba(108,85,247,.18);border-color:var(--violet)}.learning-question-actions{display:flex;gap:14px;align-items:center;justify-content:space-between}.learning-question-actions span{max-width:390px;color:#858896;font-size:11px;line-height:1.4}.learning-answer{margin-top:20px;padding-top:20px;border-top:1px solid var(--line);font-size:16px;line-height:1.65}.learning-answer a{font-weight:800;color:var(--violet)}.learning-prevnext{display:grid;grid-template-columns:1fr auto 1fr;gap:16px;align-items:center;margin:58px 0 4px;padding:20px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.learning-prevnext a{color:var(--ink);font-weight:750;text-decoration:none;line-height:1.35}.learning-prevnext .next{text-align:right}.learning-prevnext small{color:#8a8d9a;font-weight:800}.learning-footer{margin-top:0}.learning-footer-links a{color:inherit}.learning-page .eyebrow{letter-spacing:.12em}.learning-page .btn{cursor:pointer}.learning-page .site-header{background:rgba(251,250,252,.95)}
@media(max-width:760px){.learning-home-hero{padding-top:40px}.learning-home-hero h1,.learning-hero h1{font-size:clamp(42px,13.2vw,66px)}.learning-door-list{margin-top:38px}.learning-path-row{grid-template-columns:34px 1fr auto;padding:23px 0;gap:10px}.learning-path-row p{font-size:14px}.learning-kicker p{display:none}.learning-hero{padding-top:34px}.lesson-row{grid-template-columns:34px 1fr auto;gap:8px}.learning-question{margin:0 14px 72px;border-radius:18px;padding:28px 18px}.learning-question-actions{align-items:flex-start;flex-direction:column}.city-data{grid-template-columns:1fr;gap:12px}.learning-prevnext{grid-template-columns:1fr auto 1fr;font-size:12px}.learning-prevnext a{font-size:12px}.tool-line{align-items:flex-start;flex-direction:column}.popular-prompts{display:grid}.popular-prompts button{text-align:left;border-radius:14px}.learning-footer-links{display:none}}

/* editorial-sprint-final */
.learning-journey-bridge{margin:12px 0 72px;padding:0 14px}.learning-journey-top{display:flex;justify-content:space-between;gap:20px;align-items:center;padding:14px 0;border-top:2px solid var(--ink);border-bottom:1px solid var(--line);font-size:13px}.learning-journey-top a{font-weight:800;color:var(--ink);text-decoration:none}.learning-journey-top span{color:#7b7e8d;font-weight:800}.learning-journey-nav{display:grid;grid-template-columns:1fr 1fr;gap:22px;padding:16px 0;border-bottom:1px solid var(--line)}.learning-journey-nav a{font-weight:750;color:var(--ink);text-decoration:none;line-height:1.35}.learning-journey-nav .next{text-align:right}
@media(max-width:760px){.learning-prevnext{display:flex;flex-direction:column;align-items:stretch;gap:12px;font-size:14px}.learning-prevnext a{font-size:14px}.learning-prevnext small{text-align:center;order:2}.learning-prevnext .next{text-align:right;order:3}.learning-prevnext .prev{order:1}.learning-prevnext>a:first-child:not(.next){order:1}.learning-journey-bridge{margin-bottom:56px}.learning-journey-top{align-items:flex-start;flex-direction:column;gap:6px}.learning-journey-nav{grid-template-columns:1fr;gap:14px}.learning-journey-nav .next{text-align:right}.learning-journey-nav span:empty{display:none}}

/* Editorial simplification */
.learning-question{max-width:760px;margin:18px auto 58px;padding:26px 0 0;background:transparent;border:0;border-top:1px solid var(--line);border-radius:0}.learning-question h2{font:500 clamp(28px,3.4vw,38px)/1.05 var(--serif);margin:0 0 16px}.learning-question textarea{min-height:92px;margin:0 0 12px;background:#fff}.learning-question-actions{justify-content:flex-start}.learning-footer-min,.portal-footer-min{display:flex;align-items:center;justify-content:space-between;gap:18px}.learning-footer-min .footer-brand,.portal-footer-min .footer-brand{margin:0}.learning-footer-min span,.portal-footer-min span{font-size:11px;color:#8b8e9c}.learning-page .site-footer{padding:22px 0 28px}.learning-home-hero h1,.learning-hero h1{font-size:clamp(40px,6vw,72px);max-width:860px}.learning-article h2{font-size:clamp(27px,3.4vw,38px);margin-top:44px}.learning-path-row h3{font-size:clamp(24px,3vw,34px)}
@media(max-width:760px){.learning-question{margin:8px 18px 44px;padding-top:22px}.learning-question textarea{min-height:82px}.learning-home-hero h1,.learning-hero h1{font-size:clamp(38px,10.8vw,50px);line-height:1.02}.learning-article h2{font-size:30px;margin-top:38px}.learning-prevnext{grid-template-columns:1fr auto 1fr}.learning-footer-min,.portal-footer-min{font-size:12px}}

.tool-line{gap:12px 20px}.tool-line a{display:inline-flex}.learning-question .btn{padding:12px 18px}.learning-question form{margin:0}.learning-question textarea::placeholder{font-weight:500;color:#7f8290}

/* editorial-source-links */
.learning-article a.editorial-source{color:inherit;text-decoration-color:#a7a3b5;text-decoration-thickness:1px;text-underline-offset:3px}.learning-article a.editorial-source:hover{color:var(--violet)}
/* progress-resume-v1 */
.learning-complete-shell{margin:18px 0 34px}.learning-complete-shell .learning-reading{display:flex;justify-content:flex-start}.learning-complete-inline{display:flex;justify-content:flex-start;gap:8px;flex-wrap:wrap;margin:34px 0 0}.learning-complete-toggle{padding:9px 13px}.learning-complete-toggle[aria-pressed="true"],.learning-save-toggle[aria-pressed="true"]{border-color:var(--violet);color:var(--violet)}.learning-complete-toggle:disabled,.learning-save-toggle:disabled{opacity:.55;cursor:default}.learning-path-progress{max-width:980px;margin:0 auto;padding:0 24px 14px;display:flex;gap:18px;align-items:center;color:#777b8c;font-size:13px;font-weight:700}.learning-path-progress:empty{display:none}.learning-path-progress a{color:var(--violet);text-decoration:none}.lesson-row.is-completed small{color:var(--violet);font-size:18px}.lesson-row.is-completed span{color:#666978}.learning-resume{margin:26px 0 10px}.learning-resume[hidden]{display:none}.learning-resume-inner{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:14px 0}.learning-resume-top{display:flex;justify-content:space-between;gap:18px;align-items:baseline;margin-bottom:8px}.learning-resume-top strong{font-size:12px;text-transform:uppercase;letter-spacing:.1em}.learning-resume-top span{font-size:12px;color:#7c7f8e}.learning-resume-link{display:flex;justify-content:space-between;gap:16px;align-items:center;text-decoration:none;color:var(--ink);font:600 clamp(18px,2vw,23px)/1.25 var(--sans)}.learning-resume-link span{padding-right:14px}.learning-resume-link b{font-size:13px;color:var(--violet);white-space:nowrap}.learning-complete-toggle:focus-visible,.learning-save-toggle:focus-visible,.learning-path-progress a:focus-visible,.learning-resume-link:focus-visible{outline:2px solid var(--violet);outline-offset:3px}
@media(max-width:760px){.learning-complete-shell{margin:14px 0 28px}.learning-complete-inline{margin-top:28px}.learning-complete-toggle{padding:8px 11px}.learning-path-progress{padding:0 18px 10px;font-size:12px;justify-content:space-between}.learning-resume{margin:20px 0 8px}.learning-resume-inner{padding:12px 0}.learning-resume-top{display:block;margin-bottom:7px}.learning-resume-top strong,.learning-resume-top span{display:block}.learning-resume-top strong{margin-bottom:3px}.learning-resume-link{font-size:17px}.learning-resume-link b{font-size:12px}}

/* CITY HUBS 2026-09-16 */
.city-hub-eyebrow{margin-top:0;margin-bottom:8px}.city-hub-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));margin:30px 0 18px;border-top:2px solid var(--ink);border-bottom:1px solid var(--line)}.city-hub-stat{padding:17px 14px 16px 0;border-right:1px solid var(--line)}.city-hub-stat+ .city-hub-stat{padding-left:14px}.city-hub-stat:last-child{border-right:0}.city-hub-stat strong{display:block;font:500 clamp(32px,4vw,48px)/1 var(--serif);letter-spacing:-.03em;color:var(--violet);margin-bottom:7px}.city-hub-stat span{display:block;font-size:12px;line-height:1.35;font-weight:750;color:#686b7a}.learning-meta a{color:inherit;text-decoration-color:#c8c6cf;text-underline-offset:3px}.city-hub-taxonomy{margin:44px 0 30px;padding:24px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.learning-article .city-hub-taxonomy h2,.learning-article .city-hub-actions-wrap h2{font-size:clamp(24px,3vw,32px);margin:0 0 20px}.city-hub-taxonomy-row{display:grid;grid-template-columns:150px 1fr;gap:18px;align-items:start;padding:10px 0}.city-hub-taxonomy-row>strong{font-size:12px;line-height:1.45;text-transform:uppercase;letter-spacing:.08em;color:#777b8c}.city-hub-chips{display:flex;flex-wrap:wrap;gap:8px}.city-hub-chips span{display:inline-flex;padding:7px 10px;border:1px solid var(--line);border-radius:999px;background:#fff;font-size:13px;font-weight:700;color:#353849}.city-hub-actions-wrap{margin:44px 0 28px}.city-hub-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));border-top:1px solid var(--line)}.city-hub-actions a{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:15px 2px;border-bottom:1px solid var(--line);color:var(--ink);font-weight:750;text-decoration:none}.city-hub-actions a:nth-child(odd){padding-right:18px;border-right:1px solid var(--line)}.city-hub-actions a:nth-child(even){padding-left:18px}.city-hub-actions a:hover span{color:var(--violet)}.city-hub-actions b{color:var(--violet);font-weight:500}.city-index-meta{margin:24px 0 0;color:#727585;font-size:13px;font-weight:700}.city-index-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 30px;border-top:1px solid var(--line)}.city-index-card{display:block;padding:24px 0 22px;border-bottom:1px solid var(--line);color:var(--ink);text-decoration:none}.city-index-card-top{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.city-index-card h2{font:500 clamp(25px,3vw,34px)/1.05 var(--serif);letter-spacing:-.025em;margin:0}.city-index-card-top b{font-size:21px;color:var(--violet);font-weight:400}.city-index-card-metrics{display:flex;flex-wrap:wrap;gap:7px 16px;margin-top:12px;color:#747786;font-size:12px}.city-index-card-metrics strong{color:var(--ink);font-weight:800}.city-index-card:hover h2{color:var(--violet)}
@media(max-width:760px){.city-hub-stats{grid-template-columns:repeat(2,minmax(0,1fr))}.city-hub-stat{border-bottom:1px solid var(--line)}.city-hub-stat:nth-child(2){border-right:0}.city-hub-stat:nth-child(3),.city-hub-stat:nth-child(4){border-bottom:0}.city-hub-stat:nth-child(3){padding-left:0}.city-hub-stat:nth-child(4){padding-left:14px}.city-hub-taxonomy-row{grid-template-columns:1fr;gap:8px}.city-hub-actions{grid-template-columns:1fr}.city-hub-actions a:nth-child(odd),.city-hub-actions a:nth-child(even){padding-left:0;padding-right:0;border-right:0}.city-index-grid{grid-template-columns:1fr}.city-index-card{padding:20px 0}.city-index-card h2{font-size:27px}}

/* City hub regions */
.city-index-region-title{margin:2rem 0 .75rem;font-family:var(--serif);font-size:clamp(1.25rem,2vw,1.65rem);font-weight:500;letter-spacing:-.02em}
.city-index-region-title:first-child{margin-top:0}
.city-index-region-title+.city-index-grid{margin-bottom:.35rem}

.creator-learning-bridge{margin:30px 0;padding:22px;border:1px solid #dcd5e5;border-radius:18px;background:linear-gradient(135deg,#f7f2ff,#fff)}.creator-learning-bridge h2{margin:4px 0 8px}.creator-learning-bridge>p:not(.eyebrow){margin:0;color:#6d6672;line-height:1.6}.creator-learning-bridge>div{display:flex;flex-wrap:wrap;gap:9px;margin-top:16px}.creator-learning-bridge a{display:inline-flex;padding:10px 13px;border:1px solid #cdc2d8;border-radius:999px;text-decoration:none;font-weight:800;font-size:12px;background:#fff}@media(max-width:620px){.creator-learning-bridge a{width:100%;justify-content:space-between}}