:root{--blue:#285eff;--ink:#172844;--muted:#586980;--line:#dbe3ef;--paper:#f3f6fc;--white:#fff;--radius:18px;font-family:Inter,"Segoe UI",Arial,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,select,input{touch-action:manipulation}button,a{color:inherit}button{cursor:pointer}button:disabled{cursor:default;opacity:.45}a{color:var(--blue);text-underline-offset:3px}a:not([href]){pointer-events:none;opacity:.5}a:focus-visible,button:focus-visible,select:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #87a4ff;outline-offset:4px}button{border:0}h1,h2,h3,p{margin-top:0}p{line-height:1.6}h1{font-size:26px;letter-spacing:-.7px;line-height:1.17;margin-bottom:14px}h2{font-size:clamp(26px,2.4vw,40px);line-height:1.12;letter-spacing:-1px;max-width:860px;margin-bottom:14px}h3{font-size:20px;letter-spacing:-.35px;line-height:1.3;margin:0}small{display:block}.muted,.fine-print{color:var(--muted)}.fine-print{font-size:12px;line-height:1.6}.normal-weight{font-weight:400}.skip-link{position:absolute;top:-80px;left:16px;background:white;padding:12px;z-index:9}.skip-link:focus{top:10px}
.site-header{height:86px;background:var(--white);border-top:5px solid var(--blue);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 max(26px,calc((100vw - 1480px)/2));gap:20px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);font-weight:780;font-size:22px;letter-spacing:-.6px}.brand-mark{width:39px;height:39px;display:grid;place-items:center;border-radius:10px;background:var(--blue);color:white;font-size:24px}.brand-sub{font-size:11px;letter-spacing:1.8px;text-transform:uppercase;color:var(--muted);display:block;margin-top:3px}.edition{font-size:12px;display:flex;align-items:center;gap:10px;color:var(--muted)}.status-dot{width:7px;height:7px;border-radius:50%;background:var(--blue)}.draft-banner{padding:12px 26px;background:#fff3d8;color:#604208;font-size:13px;border-bottom:1px solid #ead6a4}.shell{max-width:1480px;margin:auto;display:grid;grid-template-columns:296px minmax(0,1fr);gap:38px;padding:32px 26px 50px}.sidebar{align-self:start;position:sticky;top:24px;max-height:calc(100vh - 48px);overflow:auto;padding-right:8px;scrollbar-width:thin}.sidebar-top{padding:4px 4px 4px}.eyebrow{font-size:11px;font-weight:760;letter-spacing:1.6px;color:var(--blue);margin-bottom:13px}.sidebar-top .muted{font-size:13px;line-height:1.65;margin-bottom:22px}.field-label{display:block;font-size:12px;font-weight:700;margin-bottom:8px}select,input{width:100%;border:1px solid #c7d2e3;border-radius:9px;padding:11px 12px;background:white;color:var(--ink);font-size:13px;min-height:43px}.sidebar input{margin-bottom:17px}.sidebar select{font-size:12px;padding-left:9px}.sidebar .fine-print{font-size:11px;margin:9px 0 17px}.track-heading{display:flex;align-items:center;gap:9px;margin:20px 0 9px;font-size:12px;font-weight:750}.track-badge{flex:0 0 24px;width:24px;height:24px;border:1px solid #c8d5ed;border-radius:7px;display:grid;place-items:center;color:var(--blue);font-size:11px}.lesson-button{width:100%;display:grid;grid-template-columns:27px 1fr;gap:8px;text-align:left;border:1px solid transparent;border-radius:10px;background:transparent;padding:10px 9px;margin:1px 0;line-height:1.4}.lesson-button:hover{background:#e8eef9}.lesson-button[aria-current="true"]{background:#e4edff;border-color:#b5c9ff;color:#173d9d}.lesson-code{font-size:11px;font-weight:700;padding-top:2px}.lesson-button-title{font-size:12px;font-weight:620}.lesson-meta{font-size:10px;color:var(--muted);margin-top:4px;display:block}.lesson-state{display:inline-block;margin-left:5px;color:#1c6271}.local-progress{margin-top:22px;padding-top:18px;border-top:1px solid var(--line)}.progress-head{display:flex;justify-content:space-between;font-size:12px}progress{width:100%;height:7px;margin-top:12px;border:0;appearance:none;border-radius:4px;background:#dce5f2}progress::-webkit-progress-bar{background:#dce5f2;border-radius:4px}progress::-webkit-progress-value{background:var(--blue);border-radius:4px}progress::-moz-progress-bar{background:var(--blue);border-radius:4px}.local-progress .text-button{font-size:11px;text-align:left;padding:0}
main{min-width:0}.lesson-heading{padding:4px 0 10px}.dot-divider{margin:0 10px;color:#9caac0}.objective{font-size:15px;max-width:790px;color:var(--muted);margin-bottom:18px}.video-wrap{position:relative;background:#101725;border-radius:var(--radius);overflow:hidden;aspect-ratio:16/9;box-shadow:0 10px 28px #1b315014}.video-wrap video{display:block;width:100%;height:100%;object-fit:contain}.media-placeholder{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:#d9e4f7;padding:24px;pointer-events:none}.media-placeholder[hidden]{display:none}.media-placeholder>span{font-size:38px;color:#7b9bf5}.media-placeholder p{max-width:360px;font-size:15px;margin-top:20px}.media-message{font-size:13px;background:#fff0dc;color:#594020;padding:12px;border-radius:8px;margin:12px 0 0}.player-toolbar{display:flex;justify-content:space-between;gap:14px;padding:15px 0 8px;align-items:center;flex-wrap:wrap}.toolbar-group{display:flex;gap:12px;align-items:center}.toolbar-group label{font-size:12px;color:var(--muted)}.toolbar-group select{width:73px;min-height:35px;padding:6px;font-size:12px}.small-button{background:white;border:1px solid #c4d1e3;border-radius:8px;padding:9px 12px;font-size:12px;font-weight:650}.small-button[aria-pressed="true"]{background:#e3ebff;border-color:#8ca9f8;color:#244dac}.text-button{background:transparent;padding:7px 3px;color:#34547e;text-decoration:underline;text-underline-offset:3px;font-size:12px}.lesson-nav{display:flex;justify-content:space-between;gap:14px;margin:22px 0 30px}.primary-button,.secondary-button{border-radius:10px;padding:12px 18px;font-size:13px;font-weight:680}.primary-button{background:var(--blue);color:white}.primary-button:hover{background:#1b4cdd}.secondary-button{background:white;border:1px solid #c4d1e3}.resume-banner{background:#e3edff;border:1px solid #becffc;border-radius:11px;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:13px 16px;font-size:13px;margin-bottom:21px}.resume-banner[hidden]{display:none}
.content-card,.practice-card{background:white;border:1px solid var(--line);border-radius:var(--radius);padding:25px 28px;margin-bottom:18px}.practice-card{border-top:3px solid var(--blue)}.section-heading{display:flex;gap:13px;align-items:center;margin-bottom:19px}.section-number{color:#94a6c3;font-size:11px;letter-spacing:1px;font-weight:700}.practice-prompt{font-size:17px;line-height:1.6;margin-bottom:19px}.check-line{border-left:3px solid #dce7fe;padding-left:14px;margin-bottom:16px}.check-line strong{font-size:12px;display:block;margin-bottom:5px}.check-line p{font-size:14px;color:var(--muted);margin:0}.safety-note{background:#f6f8fc;border-radius:8px;padding:11px 13px;margin:16px 0 20px}.practice-card select{max-width:650px}.practice-card .field-label{line-height:1.5}.navigation-paths{padding-left:22px;display:grid;gap:12px;margin-bottom:18px}.navigation-paths li{font-size:14px;line-height:1.6;padding-left:5px;overflow-wrap:anywhere}.resource-grid{display:grid;grid-template-columns:1fr 1fr;gap:13px}.resource-link{display:flex;align-items:center;gap:12px;padding:17px;border:1px solid var(--line);border-radius:12px;text-decoration:none;color:var(--ink);min-width:0}.resource-link:hover{border-color:#9bb6f9;background:#fafbff}.resource-link strong{font-size:13px}.resource-link small{font-size:11px;color:var(--muted);line-height:1.5;margin-top:5px}.resource-link>span:last-child{margin-left:auto;color:var(--blue)}.file-type{flex:0 0 33px;width:33px;height:39px;display:grid;place-items:center;border-radius:7px;background:#edf2fd;color:#3963ad;font-size:9px;font-weight:800}.download-row{display:flex;gap:20px;flex-wrap:wrap;margin-top:19px;font-size:12px;line-height:1.6}.transcript-card summary{cursor:pointer;list-style:none;display:flex;align-items:center;justify-content:space-between;font-weight:650;font-size:15px;gap:12px}.transcript-card summary::-webkit-details-marker{display:none}.summary-plus{font-size:22px;color:var(--blue);font-weight:400}.transcript-card[open] .summary-plus{transform:rotate(45deg)}#transcript-body{padding-top:23px;font-size:14px;line-height:1.85}#transcript-body p:last-child{margin-bottom:0}.course-downloads{padding:18px 2px 26px}.course-downloads h3{font-size:17px;margin-bottom:8px}.course-downloads p{font-size:13px;margin-bottom:8px}.page-footer{border-top:1px solid var(--line);padding-top:22px;color:#738299;font-size:11px;line-height:1.7}.page-footer p{margin-bottom:9px}.page-footer p:first-child{color:#415674;font-weight:700}.noscript{position:fixed;bottom:0;left:0;right:0;background:#fff4d8;color:#453614;padding:20px;z-index:10}video::cue{font-family:"Segoe UI",Arial,sans-serif;background:rgba(10,17,28,.9);color:white;font-size:92%}
@media(min-width:1650px){.shell{gap:48px;grid-template-columns:312px minmax(0,1fr)}}
@media(max-width:980px){.shell{grid-template-columns:242px minmax(0,1fr);gap:24px;padding:24px 18px}.sidebar-top h1{font-size:22px}.content-card,.practice-card{padding:21px}.resource-grid{grid-template-columns:1fr}.site-header{padding:0 22px;height:78px}}
@media(max-width:760px){.shell{display:flex;flex-direction:column;padding:22px 16px;gap:27px}.sidebar{order:2;position:static;max-height:none;overflow:visible;padding:25px 0 0;border-top:1px solid var(--line);width:100%}main{order:1}.sidebar-top h1 br{display:none}.sidebar-top h1{font-size:24px}.sidebar-top .muted{max-width:520px}.lesson-button{padding:12px}.lesson-button-title{font-size:14px}.lesson-meta{font-size:11px}.video-wrap{border-radius:12px}.content-card,.practice-card{padding:21px 19px}.practice-prompt{font-size:16px}.objective{font-size:14px}h2{font-size:29px}.site-header{padding:0 18px}.brand{font-size:20px}.edition{font-size:11px}.resume-banner{align-items:flex-start}.player-toolbar{gap:9px}.toolbar-group{gap:8px}.lesson-nav{margin-bottom:24px}.primary-button,.secondary-button{font-size:12px;padding:12px 13px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
.mobile-lessons-link{display:none;font-size:12px;font-weight:650;white-space:nowrap}
.index-shell{max-width:1080px;margin:45px auto;padding:0 24px}.index-shell h1{font-size:36px}.index-table-wrap{overflow-x:auto;border:1px solid var(--line);background:white;border-radius:14px;margin:24px 0 18px}.index-table{width:100%;border-collapse:collapse;font-size:13px;text-align:left}.index-table caption{text-align:left;padding:19px;color:var(--muted);font-size:12px;line-height:1.6}.index-table th,.index-table td{padding:15px 18px;border-bottom:1px solid var(--line);line-height:1.55}.index-table thead{background:#edf2fc;font-size:11px}.index-table tbody tr:last-child th,.index-table tbody tr:last-child td{border-bottom:0}.index-table td:nth-child(3),.index-table td:nth-child(4){white-space:nowrap}.index-table a{text-decoration:none}.index-table a:hover{text-decoration:underline}
@media(max-width:760px){.mobile-lessons-link{display:inline-block}.edition{display:none}}
@media print{.site-header,.sidebar,.video-wrap,.player-toolbar,.lesson-nav,.resume-banner,.course-downloads,.local-progress{display:none!important}.shell{display:block;padding:0}main{width:100%}.content-card,.practice-card{break-inside:avoid;box-shadow:none}.page-footer{font-size:10px}#transcript-body{display:block}}

/* Captions have their own layout space, outside native playback controls. */
.video-wrap{aspect-ratio:auto}
.video-wrap video{height:auto;aspect-ratio:16/9;object-fit:contain}
.caption-band{display:flex;align-items:center;justify-content:center;min-height:calc(2.7em + 16px);padding:8px 16px;border-top:1px solid #29374d;background:#101c30;color:#fff;font-size:clamp(17px,1.5vw,22px);text-align:center}
.caption-band[hidden]{display:none}
#caption-text{margin:0;line-height:1.35;white-space:pre-line;font-weight:500;max-width:100%;overflow-wrap:normal}
.fullscreen-controls{display:none}
.video-wrap:fullscreen{display:flex;flex-direction:column;justify-content:center;width:100vw;height:100vh;border-radius:0;box-shadow:none;background:#0c1422}
.video-wrap:fullscreen video{flex:1 1 0;min-height:0;height:0;width:100%;aspect-ratio:auto;object-fit:contain}
.video-wrap:fullscreen .caption-band{flex:0 0 auto;font-size:clamp(20px,2.15vw,32px)}
.video-wrap:fullscreen .fullscreen-controls{display:flex;flex:0 0 auto;align-items:center;gap:12px;padding:7px 16px;background:#101c30;border-top:1px solid #29374d;color:white}
.fullscreen-controls>span{margin-right:auto;font-size:12px;letter-spacing:.3px}
.fullscreen-controls .small-button{padding:6px 10px;min-height:30px;background:#1b2b43;border-color:#4b6282;color:white}
.fullscreen-controls .small-button[aria-pressed="true"]{background:#304a77}