:root{--navy:#172b49;--ink:#1c2d46;--blue:#2866c4;--sky:#eaf2ff;--coral:#ed6b54;--lime:#dfff79;--paper:#fff;--canvas:#f6f7fb;--line:#dfe5ed;--muted:#5a697b;--focus:#b65c13}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--canvas);color:var(--ink);font:16px/1.55 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}button,input,textarea{font:inherit}button,a{touch-action:manipulation}a{color:inherit}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid var(--focus);outline-offset:3px}.skip{position:absolute;top:-100px;left:14px;padding:8px;background:white;z-index:20}.skip:focus{top:8px}.site-header{height:84px;max-width:1280px;margin:auto;padding:0 32px;display:flex;align-items:center;gap:38px}.brand{display:flex;align-items:center;gap:11px;text-decoration:none;font-size:21px;letter-spacing:-.055em;font-weight:800;color:var(--navy)}.brand-light{font-weight:450}.brand b,.footer-brand 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small{display:block;color:var(--muted);font-size:11px;margin-top:5px}.spec-link{display:block;padding:18px 21px;color:var(--blue);font-size:12px;font-weight:750}.study-top{display:flex;justify-content:space-between;gap:15px;padding:27px 31px 23px;background:linear-gradient(130deg,#fbfdff,#f2f6fd)}.study-top h3{font-size:31px;line-height:1.13;letter-spacing:-.04em;margin:10px 0 7px}.study-top p{margin:0;color:var(--muted);font-size:14px}.chapter-index{font-size:42px;font-weight:850;color:#d8e4f5;letter-spacing:-.08em}.tabs{display:flex;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:0 27px;gap:8px}.tabs button{border:0;border-bottom:3px solid transparent;padding:15px 13px 12px;background:none;color:var(--muted);font-weight:750;cursor:pointer}.tabs button[aria-selected="true"]{color:var(--blue);border-color:var(--coral)}#practice-panel{padding:29px 31px 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/* Student Future visual study: screenshot burgundy #80225e and condensed type. */
@font-face{font-family:Anton;src:url('/fonts/anton-latin-400.woff2') format('woff2');font-style:normal;font-weight:400;font-display:swap}
@font-face{font-family:Oswald;src:url('/fonts/oswald-latin-400.woff2') format('woff2');font-style:normal;font-weight:400;font-display:swap}
@font-face{font-family:Oswald;src:url('/fonts/oswald-latin-700.woff2') format('woff2');font-style:normal;font-weight:700;font-display:swap}
:root{--navy:#80225e;--ink:#40233a;--blue:#80225e;--sky:#f8eaf2;--coral:#d18cac;--lime:#fff;--paper:#fff;--canvas:#fbf8fa;--line:#e9d6e2;--muted:#655265;--focus:#bf6b16}
body{font-family:Oswald,"Arial Narrow",sans-serif;letter-spacing:.012em}
.site-header{background:var(--navy);color:#fff;max-width:none;padding-left:max(32px,calc((100vw - 1216px)/2));padding-right:max(32px,calc((100vw - 1216px)/2))}
.brand{font-family:Oswald,sans-serif;text-transform:uppercase;letter-spacing:.035em;color:#fff;font-size:23px}
.brand-light{font-weight:700}
.brand b,.footer-brand span{color:#f0bfd7}
.brand-symbol{background:#fff;color:var(--navy);font-family:Anton,sans-serif;font-weight:400;letter-spacing:0}
.brand-symbol span{color:var(--navy)}
.site-header nav a{font-family:Oswald,sans-serif;text-transform:uppercase;letter-spacing:.055em;font-size:16px;color:#fff;font-weight:400}
.site-header nav a:first-child{font-weight:700}
.header-pill{color:#fff;border-color:#d8a5c0;font-family:Oswald,sans-serif;font-size:12px}
.hero{background:var(--navy)}
.overline{color:#f5d8e8;font-family:Oswald,sans-serif;font-size:13px}
.overline-line{background:#f1c2d9}
.hero h1,.section-heading h2{font-family:Anton,Impact,"Arial Narrow",sans-serif;font-weight:400;text-transform:uppercase;letter-spacing:.015em}
.hero h1{line-height:1.08;font-size:clamp(54px,5.6vw,80px)}
.hero h1 em{color:#f5d8e8;font-weight:400}
.hero-description{color:#fff;font-family:Oswald,sans-serif;font-size:19px}
.button{font-family:Oswald,sans-serif;text-transform:uppercase;letter-spacing:.045em}
.button-light{background:#fff;color:var(--navy)}
.button-primary{background:var(--navy);color:#fff}
.button-outline{color:var(--navy);border-color:#c895b3}
.hero-aside{background:#671548;border-color:#bd79a0;box-shadow:25px 25px 0 #551038}
.hero-aside>span{color:#f3c9dd}
.hero-aside strong{font-family:Anton,Impact,sans-serif;font-weight:400;letter-spacing:.025em}
.hero-aside strong span{color:#f1b6d1}
.hero-aside-bottom span{background:#8f376e}
.section-index{color:var(--navy);font-family:Oswald,sans-serif;font-size:12px}
.section-heading h2{letter-spacing:.012em}
.section-heading p,.study-top p,.hint,.review-note,.review-status{font-family:Oswald,sans-serif}
.sidebar-top,.topic-copy strong,.topic-copy small,.spec-link,.tabs button,.question-meta,.option,.feedback,.review-result,.topic-progress-card{font-family:Oswald,sans-serif}
.topic-button:hover{background:#fcf2f7}
.topic-button[aria-current="true"]{background:#f8e8f1;border-left-color:var(--navy)}
.study-top{background:linear-gradient(130deg,#fff,#f9edf4)}
.study-top h3{font-family:Anton,Impact,sans-serif;text-transform:uppercase;font-weight:400;letter-spacing:.015em}
.chapter-index{font-family:Anton,Impact,sans-serif;font-weight:400;color:#e6bfd4}
.tabs button{text-transform:uppercase;letter-spacing:.035em}
.tabs button[aria-selected="true"]{border-color:var(--navy)}
.question-title{font-family:Oswald,sans-serif;font-weight:700;letter-spacing:.005em}
.question-meta:after{background:var(--line)}
.option:has(input:checked){background:#fcf0f6}
.feedback{background:#f8eaf2}
.feedback.wrong{border-color:#a15b19;background:#fff3e8}
.stimulus{border-color:var(--navy);background:#f9edf4}
.stimulus strong{color:#80225e}
.review-result{border-color:#d8adca;background:#fcf4f8}
.progress-summary{background:var(--navy)}
.progress-summary>div{border-color:#ad7095}
.progress-summary strong{font-family:Anton,Impact,sans-serif;font-weight:400;letter-spacing:.015em}
.progress-summary strong span,.progress-summary>div>span{color:#f0d1e2}
footer{background:var(--navy);color:#f1d5e4}
.footer-brand{font-family:Anton,Impact,sans-serif;font-weight:400;text-transform:uppercase;letter-spacing:.035em}
@media(max-width:850px){.hero-aside{box-shadow:12px 12px 0 #551038}}
@media(max-width:600px){.site-header{padding:0 18px}.brand{font-size:17px}.brand-symbol{font-size:16px}.site-header nav a{font-size:12px}.hero h1{font-size:clamp(46px,11vw,60px)}}

/* Course-wide topic navigation retains the pilot's sidebar and practice card. */
.section-selector{display:grid;gap:10px;margin:-2px 0 24px}
.strand-heading{font:700 15px/1.3 Oswald,sans-serif;letter-spacing:.07em;text-transform:uppercase;color:var(--navy);margin-top:7px}
.section-buttons{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}
.section-button{display:flex;align-items:flex-start;gap:9px;text-align:left;border:1px solid var(--line);border-radius:9px;background:#fff;padding:11px 12px;min-height:66px;color:var(--ink);cursor:pointer;font:400 14px/1.25 Oswald,sans-serif}
.section-button strong{flex:none;color:var(--navy);font-weight:700}
.section-button:hover{background:#fcf2f7}
.section-button[aria-pressed="true"]{border-color:var(--navy);background:#f8e8f1;box-shadow:inset 0 0 0 1px var(--navy)}
.section-button span{overflow-wrap:anywhere}
.topic-progress{grid-template-columns:repeat(4,minmax(0,1fr))}
.topic-progress-card strong{font-size:15px}
.topic-progress-card span{font-size:13px}
@media(max-width:900px){.section-buttons{grid-template-columns:repeat(2,minmax(0,1fr))}.topic-progress{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:600px){.section-buttons{grid-template-columns:1fr 1fr}.section-button{display:block;min-height:74px;font-size:13px}.section-button strong{display:block;margin-bottom:3px}.topic-progress{grid-template-columns:1fr 1fr}}
@media(max-width:390px){.section-buttons,.topic-progress{grid-template-columns:1fr}}