/* One visual system: ink, paper, teal; compact controls and generous reading space. */
:root{--ink:#142d3e;--muted:#5b6e7b;--teal:#12685f;--line:#dce4e8;--paper:#fff;--wash:#f4f6f7}
body{background:var(--wash);color:var(--ink);font-size:17px;line-height:1.75;overflow-wrap:normal}
header,main,footer{max-width:1240px;padding-left:32px;padding-right:32px}header{min-height:104px;padding-top:20px;padding-bottom:20px;gap:20px}header nav{gap:6px}header nav a{font-size:15px;color:#526772;padding:10px 17px;border-radius:9px}header nav a[aria-current=page]{background:#e3eeeb;color:#155d53}header nav a:hover{background:#e8efed}
.brand{display:flex;align-items:center;gap:11px;font-size:25px;color:var(--ink);line-height:1.1}.brand .brand-mark{display:flex;flex-direction:column;justify-content:center;align-items:center;gap:3px;width:31px;height:47px;background:var(--ink);border-radius:10px}.brand-mark i{width:7px;height:7px;border-radius:50%;background:#dd676a}.brand-mark i:nth-child(2){background:#edc65d}.brand-mark i:nth-child(3){background:#67b89b}.brand .brand-text{font-size:25px;color:var(--ink)}.brand small{display:block;font-size:11px;letter-spacing:.07em;font-weight:750;color:#617784;margin-top:5px}
main{padding-top:8px}.eyebrow{font-size:11px;letter-spacing:.1em;font-weight:900;color:#34695e}h1,h2,h3{letter-spacing:-.025em}.button,button{font-size:15px;font-weight:800;border-color:#cbd8de;border-radius:10px;padding:12px 17px;transition:background .15s,border-color .15s}.primary{background:#1b7566;border-color:#1b7566}.primary:hover{background:#125a4f}.button:hover{border-color:#7fa89c}.button.primary:hover{color:white}.actions{gap:12px;margin:26px 0}
.course-hero{display:grid;grid-template-columns:1.15fr 1fr;background:#142f3e;border:1px solid #263f4c;border-radius:24px;padding:clamp(26px,4vw,52px);gap:38px;align-items:center;color:#f4f8fa;overflow:hidden}.course-hero .eyebrow{color:#a6d5c5;display:flex;align-items:center;gap:9px}.live-dot{width:7px;height:7px;border-radius:50%;background:#8fd2af}.course-hero h1{font-size:clamp(34px,4.6vw,57px);line-height:1.13;margin:20px 0 23px;font-weight:950;letter-spacing:-.045em}.course-hero h1 em{font-style:normal;color:#a9d9c5}.hero-copy>p:not(.eyebrow){color:#c2d1d8;font-size:16px;max-width:50ch}.hero-secondary{color:#e0efeb;text-decoration:none;font-size:14px;font-weight:800;align-self:center;padding:10px 0}.hero-caption{font-size:12px!important;color:#a5bbc4!important}.hero-caption span{margin:0 10px;color:#80ab9e}.hero-art{border:1px solid #68817f;border-radius:17px;background:#e6eee9;box-shadow:0 18px 35px #07151f35;overflow:hidden;transform:rotate(-2deg)}.hero-art img{width:100%;height:auto;display:block;max-width:none}.map-caption,.map-legend{display:flex;justify-content:space-between;gap:8px;align-items:center;padding:16px 18px;color:#334f57;font-size:10px;letter-spacing:.08em;font-weight:900}.map-legend{font-size:11px;letter-spacing:0;background:#f3f6f1;flex-wrap:wrap}.map-legend span{display:flex;align-items:center;gap:6px}.map-legend i{width:7px;height:7px;border-radius:50%}.legend-walk{background:#e2ae48}.legend-car{background:#4e8bc8}.legend-cross{background:#6a7d7f}
.course-facts{display:grid;grid-template-columns:repeat(4,1fr);background:white;border:1px solid var(--line);border-radius:16px;margin:20px 0 56px}.course-facts>div{padding:23px 28px;display:flex;align-items:center;gap:12px;min-width:0}.course-facts>div+div{border-left:1px solid var(--line)}.course-facts strong{font-size:29px;line-height:1.2;font-weight:950;white-space:nowrap;letter-spacing:-.04em}.course-facts span{font-size:12px;line-height:1.5;color:var(--muted)}.course-facts .read-progress{background:#eef5f1;border-radius:0 15px 15px 0}.read-progress strong{font-size:23px;color:#236a5c}
.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:24px}.section-heading h2{font-size:34px;margin:8px 0}.section-heading p:not(.eyebrow){color:var(--muted);font-size:15px;margin-bottom:0}.lesson-search{display:flex;flex-direction:column;gap:7px;min-width:230px;font-size:12px;font-weight:800;color:#546b77}.lesson-search input{background:white;width:100%;border:1px solid #cdd9df;border-radius:10px;padding:12px 14px;font:inherit;font-size:14px;min-height:46px}.course-filters{display:flex;gap:8px;flex-wrap:wrap;margin:26px 0 0}.course-filters button{border:1px solid #d7e1e5;color:#546c78;font-size:12px;font-weight:800;border-radius:8px;background:white;padding:8px 13px;min-height:40px}.course-filters button[aria-pressed=true]{background:#173b46;border-color:#173b46;color:white}.course-filters button span{margin-left:6px;opacity:.7}.filter-status{font-size:12px;color:#62747e;margin:18px 0 13px}.cards{grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.card{position:relative;padding:22px;background:white;gap:11px;border:1px solid #d6e0e4;border-radius:16px;box-shadow:none;min-width:0}.card[hidden]{display:none}.card:hover{border-color:#72a395;box-shadow:0 8px 22px #1a4f4521}.lesson-cover{width:calc(100% + 44px);height:176px;margin:-22px -22px 13px;max-width:none;border-radius:15px 15px 0 0;object-fit:cover;object-position:center}.card .number{position:absolute;top:12px;left:12px;background:#ffffffed;border-radius:7px;padding:4px 9px;font-size:12px;color:#204d50;box-shadow:0 2px 9px #25424a15}.card .eyebrow{font-size:10px;letter-spacing:.055em;color:#50776b}.card h2{font-size:21px;line-height:1.4;min-height:58px;margin:0;font-weight:900}.card>[data-progress]{font-size:12px;color:#236a5e;font-weight:900;margin-top:auto;padding-top:14px;border-top:1px solid #e7edee}.study-method{display:grid;grid-template-columns:1fr 1fr;gap:55px;background:#e9efec;border:1px solid #d1ded8;border-radius:20px;padding:40px;margin:55px 0 24px}.study-method h2{font-size:34px;line-height:1.25;margin:12px 0 18px}.study-method>div>p:last-child{font-size:15px;color:#526e68}.study-method ol{list-style:none;margin:0;padding:0}.study-method li{display:flex;gap:16px;padding:15px 0}.study-method li+li{border-top:1px solid #ccdad3}.study-method li>span{font-size:12px;color:#447568;font-weight:900;padding-top:4px}.study-method h3{font-size:17px;margin:0 0 6px}.study-method li p{font-size:13px;color:#5a716c;margin:0}.scope-note{display:flex;gap:20px;align-items:baseline;padding:20px 0;border-top:1px solid #d5dfe3;font-size:12px;color:#61737d}.scope-note strong{white-space:nowrap;color:#405d68}.scope-note p{margin:0}.scope-note a{color:#246b5f}footer{margin-top:38px;border-top:1px solid #dae4e7;font-size:12px;line-height:1.8;padding-top:25px;padding-bottom:30px;color:#6a7b84}
.learning-layout{display:grid;grid-template-columns:238px minmax(0,1fr);gap:36px;align-items:start}.course-outline{position:sticky;top:24px;background:white;border:1px solid var(--line);border-radius:15px;padding:20px 15px;min-width:0}.outline-back{font-size:12px;color:#607984;text-decoration:none;display:block;padding:0 7px 18px;border-bottom:1px solid #e1e8eb}.course-outline>.eyebrow{font-size:10px;margin:20px 7px 10px}.course-outline ol{padding:0;margin:0;list-style:none}.course-outline li a{display:flex;gap:10px;font-size:12px;line-height:1.6;text-decoration:none;color:#526976;padding:10px 8px;border-radius:7px}.course-outline li a span{font-size:10px;color:#7a909b;padding-top:2px;font-weight:900}.course-outline li a[aria-current=page]{background:#e6f2ed;color:#165c50;font-weight:900}.course-outline li a:hover{background:#f0f5f3}.outline-source{display:block;padding:18px 7px 0;border-top:1px solid #e3eaed;font-size:11px;margin-top:16px;color:#51756a;text-decoration:none}.lesson-body{min-width:0}.breadcrumb{font-size:11px;color:#7d9099;margin:8px 0 19px;display:flex;gap:10px}.breadcrumb a{color:#557b70;text-decoration:none}.lesson-body>.hero{padding:30px 32px;background:#e8f0ed;border:1px solid #ceded5;border-radius:17px}.lesson-body .hero h1{font-size:34px;line-height:1.25;letter-spacing:-.035em;margin:12px 0 20px}.lesson-body .hero p:last-child{font-size:16px;line-height:1.85;color:#395967;margin-bottom:0}.panel{border-color:#d7e2e7;border-radius:17px;box-shadow:none}.panel>h2{font-size:23px;margin:4px 0 20px}.panel>p{font-size:16px;line-height:1.9;color:#48616f}.panel>figure{padding:10px;border-radius:12px;background:#f6f9fa}.panel>figure img{border-radius:8px}.panel figcaption{font-size:12px}.steps{font-size:15px;line-height:1.8}.picture-story{border-radius:18px;background:#eef3f1;border-color:#d3e0d9}.story-heading h2{font-size:24px}.story-heading p{font-size:13px}.story-grid{gap:16px;grid-template-columns:repeat(2,minmax(0,1fr))}.story-card{border-radius:13px;box-shadow:none}.story-card figcaption{padding:17px;font-size:13px}.story-card figcaption strong{font-size:17px}.story-step{width:28px;height:28px;font-size:11px}.question h3{font-size:18px;line-height:1.6}.options button{font-size:14px;line-height:1.7;border-color:#d4dfe5;border-radius:10px;padding:13px 15px;font-weight:600}.options button:hover:not(:disabled){background:#f0f6f4;border-color:#81ad9f}.options .wrong{border-color:#b56a50;background:#fff0e9}.options .right{border-color:#478870;background:#e5f3eb}.feedback{font-size:13px;line-height:1.9;border:1px solid #dce7ec;background:#f2f7fa}.source{font-size:12px;background:#f0f4f6;border:1px solid #d8e3e8;border-left:3px solid #7d9baf}.sign{border-radius:16px;box-shadow:none;border-color:#d5e1e6}.sign strong{font-size:15px}.sign-grid{gap:18px}.note{font-size:14px}.stop-line{font-size:13px}
@media(min-width:1450px){.course-hero{min-height:440px}}@media(max-width:1050px){.course-facts>div{padding:20px 16px}.course-facts strong{font-size:25px}.course-facts span{font-size:11px}.cards{grid-template-columns:repeat(2,minmax(0,1fr))}.learning-layout{grid-template-columns:200px minmax(0,1fr);gap:22px}.course-outline{padding:16px 10px}.story-grid{grid-template-columns:1fr}.course-hero{gap:24px}.course-hero h1{font-size:42px}.hero-art{transform:none}}
@media(max-width:760px){header,main,footer{padding-left:20px;padding-right:20px}header{min-height:90px;gap:14px}header nav{gap:0}header nav a{padding:10px 11px;font-size:13px}.course-hero{grid-template-columns:1fr;gap:24px;padding:30px}.hero-copy{order:0}.hero-art{order:1}.course-hero h1{font-size:43px}.hero-art img{max-height:280px;object-fit:cover}.course-facts{grid-template-columns:repeat(2,minmax(0,1fr));margin-bottom:38px}.course-facts>div{padding:21px}.course-facts>div:nth-child(3){border-left:0;border-top:1px solid var(--line)}.course-facts>div:nth-child(4){border-top:1px solid var(--line);border-radius:0 0 15px 0}.section-heading{align-items:stretch;flex-direction:column;gap:16px}.lesson-search{min-width:0;max-width:100%}.section-heading h2{font-size:30px}.study-method{grid-template-columns:1fr;gap:18px;padding:26px;margin-top:36px}.study-method h2{font-size:30px}.scope-note{flex-direction:column;gap:7px}.learning-layout{display:block}.course-outline{position:static;margin:0 0 20px;padding:15px}.course-outline ol{display:flex;overflow-x:auto;gap:6px;padding:0 0 6px}.course-outline li{flex:0 0 165px}.course-outline .outline-back{border:0;padding:0 0 8px}.course-outline>.eyebrow,.outline-source{display:none}.course-outline li a{background:#f2f6f5;padding:10px}.lesson-body .hero h1{font-size:30px}.lesson-body>.hero{padding:24px}.story-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:480px){header,main,footer{padding-left:16px;padding-right:16px}header{align-items:center;min-height:82px}.brand .brand-text{font-size:22px}.brand small{font-size:9px}.brand .brand-mark{height:41px;width:27px;border-radius:8px}header nav a{font-size:12px;padding:9px 7px}.course-hero{padding:25px 22px;border-radius:18px;gap:19px}.course-hero h1{font-size:37px}.course-hero .eyebrow{font-size:9px}.hero-copy>p:not(.eyebrow){font-size:14px;line-height:1.85}.course-hero .actions{margin:22px 0 13px;gap:15px}.course-hero .primary{font-size:13px;padding:12px 14px}.hero-secondary{font-size:12px}.hero-caption{font-size:10px!important}.map-caption,.map-legend{padding:11px 13px;font-size:9px}.hero-art{border-radius:12px}.course-facts>div{padding:18px 15px;gap:10px}.course-facts strong{font-size:26px}.course-facts span{font-size:10px}.read-progress strong{font-size:22px}.cards{grid-template-columns:1fr;gap:17px}.card{padding:21px;gap:9px}.lesson-cover{width:calc(100% + 42px);height:185px;margin:-21px -21px 12px}.card h2{font-size:22px;min-height:0}.card .eyebrow{font-size:10px}.card>[data-progress]{margin-top:10px;padding-top:12px;font-size:12px}.course-filters{gap:7px;margin-top:19px}.course-filters button{font-size:11px;padding:8px 10px}.section-heading h2{font-size:29px}.section-heading p:not(.eyebrow){font-size:13px}.study-method{padding:23px}.study-method h2{font-size:28px}.scope-note strong{white-space:normal}.story-grid{grid-template-columns:1fr}.lesson-body>.hero{padding:22px}.lesson-body .hero h1{font-size:29px}.lesson-body .hero p:last-child{font-size:15px}.panel>p{font-size:15px}.course-outline li{flex-basis:155px}.question h3{font-size:17px}.options button{font-size:14px}.sign-grid{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){button,.button,.card{transition:none}}
/* Quiet, readable typography for a learning product. */
body{font-family:'Segoe UI',system-ui,-apple-system,BlinkMacSystemFont,Arial,sans-serif}h1,h2,h3,.brand,.course-facts strong{font-family:'Segoe UI',system-ui,sans-serif}h1,.course-hero h1{font-weight:750}.card h2,.brand{font-weight:750}.course-facts span{font-size:13px}.course-facts strong{font-weight:750}.button,button{font-weight:650}.card h2{letter-spacing:-.025em}.course-hero .hero-copy>p{line-height:1.85}@media(max-width:1050px){.course-facts span{font-size:11px}}@media(max-width:480px){.course-facts span{font-size:11px}.course-hero h1{font-size:35px;line-height:1.17}.course-hero .actions{align-items:flex-start}.hero-copy .hero-secondary{padding:2px 0}}
/* Vector clarity and an accessible magnifier. */
.panel>figure img,.story-card>img,.sign img{image-rendering:auto;opacity:1;filter:none}.enlarge-picture{font-size:12px!important;font-weight:700;padding:9px 13px!important;min-height:40px!important;margin:10px 12px;border-color:#9fb9c7!important;background:#fff!important;color:#164d5b!important;border-radius:8px!important;align-self:flex-start}.hero-art .enlarge-picture{display:flex;margin:10px 14px}.road-image-dialog{width:min(1100px,96vw);max-width:96vw;max-height:96vh;padding:20px;border:1px solid #a9c2cd;border-radius:18px;background:#fff;color:#16394b;box-shadow:0 25px 100px #071c4250}.road-image-dialog::backdrop{background:#071e32bb}.viewer-toolbar{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}.viewer-toolbar>div{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.viewer-toolbar button{min-width:42px;min-height:44px;padding:8px 13px}.viewer-toolbar output{min-width:48px;text-align:center;font-size:14px}.viewer-toolbar button:disabled{opacity:.45}.viewer-help,.viewer-caption{font-size:13px;line-height:1.6;color:#456471;margin:12px 0}.viewer-canvas{max-height:65vh;overflow:auto;border:1px solid #bdd0da;border-radius:12px;background:#edf4f7;overscroll-behavior:contain}.viewer-canvas img{display:block;width:100%;max-width:none!important;height:auto;border-radius:0;image-rendering:auto}.viewer-canvas:focus-visible{outline:3px solid #326eab;outline-offset:3px}.road-image-dialog .viewer-toolbar strong{font-size:17px}.road-image-dialog .viewer-caption{margin-bottom:0}@media(max-width:500px){.road-image-dialog{padding:14px;width:96vw}.viewer-toolbar{gap:10px}.viewer-toolbar button{font-size:12px;padding:8px 11px}.viewer-canvas{max-height:59vh}.viewer-help{font-size:12px}.story-card>img{background:white}.panel>figure figcaption{font-size:13px;line-height:1.8}}
.realistic-hero{width:100%;height:auto;aspect-ratio:3/2;object-fit:cover}.photo-disclosure{font-size:10px;line-height:1.6;margin:0;padding:10px 16px;background:#f5f7f3;color:#425f68}.realistic-photo{background:#fff!important;padding:0!important;overflow:hidden}.realistic-photo img{width:100%;height:auto;display:block;object-fit:contain}.realistic-photo figcaption{padding:15px!important;font-size:13px!important;line-height:1.8}.hero-art img.realistic-hero{max-height:none;object-fit:cover}
/* Photographic teaching assets preserve their full frame and sign geometry. */
.sign img{object-fit:contain;background:#f5f7f8;border-radius:12px;height:190px;max-width:250px}.story-card>img{aspect-ratio:3/2;object-fit:contain;background:#eaf0f3}.lesson-cover{object-fit:cover}.panel>figure img{object-fit:contain;background:#eef3f5}.viewer-canvas img{object-fit:contain}.sign strong{line-height:1.6}.story-card figcaption{line-height:1.8}