:root{--ink:#18323b;--teal:#005a70;--blue:#2980b9;--orange:#e67e22;--green:#188754;--paper:#f7fafb;--line:#d7e2e5;--muted:#526771;--white:#fff;--focus:#d36800}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.55 Arial,Helvetica,sans-serif}.skip-link{position:absolute;left:-999px;top:0;background:#fff;color:#000;padding:.65rem;z-index:9}.skip-link:focus{left:.5rem;top:.5rem;outline:3px solid var(--focus)}.site-header{background:var(--teal);color:#fff;padding:1rem max(1.25rem,calc((100% - 1080px)/2));display:flex;justify-content:space-between;gap:1rem;align-items:center}.site-header p{margin:0;font-size:.9rem}.brand{color:#fff;text-decoration:none;font-weight:700;font-size:1.2rem}.landing,.lesson-shell{max-width:1080px;margin:0 auto;padding:2.5rem 1.25rem 4rem}.eyebrow,.step-label{color:var(--teal);font-weight:700;font-size:.78rem;letter-spacing:.08em}.landing h1{font-size:clamp(2rem,6vw,3.6rem);line-height:1.08;margin:.25rem 0 1rem}.lede{max-width:700px;font-size:1.15rem}.lesson-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem;margin-top:2rem}.lesson-card{border:1px solid var(--line);border-top:5px solid #8aa2aa;background:#fff;border-radius:8px;padding:1.1rem;color:var(--ink);text-decoration:none;display:grid;gap:.2rem;min-height:150px}.lesson-card.active{border-top-color:var(--orange);box-shadow:0 4px 14px #18323b20}.lesson-card:hover{transform:translateY(-2px)}.lesson-card span,.lesson-card small{color:var(--muted)}.lesson-card strong{font-size:1.1rem}.course-nav{display:flex;gap:.4rem;flex-wrap:wrap;margin:1.1rem 0 1.75rem}.course-nav a{border:1px solid #bfd0d6;border-radius:20px;padding:.3rem .65rem;text-decoration:none;color:var(--teal);font-size:.86rem}.course-nav a[aria-current=page]{background:var(--teal);color:#fff}.progress-row{display:flex;justify-content:space-between;align-items:center;gap:1rem;border-bottom:1px solid var(--line);padding-bottom:1rem;margin-bottom:1.5rem}.progress-row p{margin:0;color:var(--muted)}progress{width:150px;height:10px;accent-color:var(--orange)}.step{display:none}.step.active{display:block}.panel{background:#fff;border:1px solid var(--line);border-radius:10px;padding:clamp(1.1rem,3vw,2rem);margin:1rem 0}.panel h1,.panel h2,.panel h3{line-height:1.2}.panel h1{font-size:clamp(1.75rem,4vw,2.55rem);margin-top:.25rem}.target-list,.number-list{padding-left:1.3rem}.pacing-table{width:100%;max-width:700px;border-collapse:collapse;margin:1rem 0}.pacing-table caption{text-align:left;font-weight:700;margin-bottom:.4rem}.pacing-table th,.pacing-table td{border:1px solid var(--line);padding:.65rem .8rem;text-align:left}.pacing-table th{background:#eaf3f5;color:var(--ink)}.pacing-table tbody tr:nth-child(even){background:#f5f9fa}.vocab{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:.65rem}.term{border-left:4px solid var(--blue);padding:.6rem .8rem;background:#f2f7f8}.term span{display:block}.term-button{display:block;border:0;background:transparent;color:var(--teal);font:inherit;font-weight:700;padding:0;text-decoration:underline;cursor:pointer;text-align:left}.makeup-notice{display:none;border-left:5px solid var(--orange);background:#fff5e9;padding:1rem 1.2rem;margin:1.25rem 0}.makeup-notice.active{display:block}.makeup-notice h2{margin:.1rem 0 .35rem;font-size:1.2rem}.makeup-notice p{margin:.35rem 0}.video-wrap{position:relative;padding-top:56.25%;background:#102830;margin:1rem 0}.video-wrap iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.open-link{font-weight:700}.check{border:1px solid var(--line);border-radius:8px;padding:1rem;margin:1rem 0}.check fieldset{border:0;padding:0;margin:0}.check legend{font-weight:700}.check label{display:block;padding:.3rem 0}.check button,.next,.submit-style{background:var(--teal);border:0;border-radius:5px;color:#fff;font:inherit;font-weight:700;padding:.65rem .95rem;cursor:pointer}.check button:hover,.next:hover{background:#004556}.feedback{margin:.6rem 0 0;font-weight:700}.feedback.good{color:var(--green)}.feedback.try{color:#a14300}.message{background:#eef3f4;border:1px solid #cbdade;border-radius:6px;padding:1rem;white-space:pre-line}.compare{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,250px),1fr));gap:1rem}.compare>div:first-child .message{border-top:4px solid var(--orange)}.compare>div:last-child .message{border-top:4px solid var(--green)}.compare>div{min-width:0}select,textarea{width:100%;max-width:700px;border:1px solid #8ea8b0;border-radius:5px;padding:.7rem;font:inherit}textarea{min-height:170px}.rubric{background:#eaf3f5;border-radius:7px;padding:1rem}.assessment{background:#edf8f1;border-left:5px solid var(--green);padding:1rem}.definition-dialog{width:min(92vw,34rem);border:2px solid var(--teal);border-radius:10px;color:var(--ink);padding:1.5rem}.definition-dialog::backdrop{background:#18323b99}.definition-dialog h2{margin-top:0}.step-nav{display:flex;justify-content:space-between;gap:1rem;margin-top:1.5rem}.next[disabled]{background:#90a6ad;cursor:not-allowed}:focus-visible{outline:3px solid var(--focus);outline-offset:3px}footer{text-align:center;color:#526771;padding:1.5rem;border-top:1px solid var(--line)}@media(max-width:620px){.site-header{display:block}.site-header p{margin-top:.2rem}.progress-row{align-items:flex-start;flex-direction:column}.step-nav{flex-direction:column}.next{width:100%}}

@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.lesson-card:hover{transform:none}}