.sc-page, .sc-static, .sc-widget { --sc-paper:#f4eedf; --sc-ink:#172c35; --sc-muted:#566466; --sc-orange:#a84c2d; --sc-line:#d7cdbb; --sc-soft:#e9e1d1; color:var(--sc-ink); font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif; font-size:16px; line-height:1.6; }
.sc-page *, .sc-static *, .sc-widget * { box-sizing:border-box; }
.sc-page { margin:0; background:var(--sc-paper); }
.sc-page a, .sc-static a, .sc-widget a { color:inherit; text-underline-offset:4px; }
.sc-page a:hover, .sc-static a:hover, .sc-widget a:hover { color:var(--sc-orange); }
.sc-page :focus-visible, .sc-static :focus-visible, .sc-widget :focus-visible { outline:3px solid #a84c2d; outline-offset:4px; }
.sc-widget [hidden] { display:none !important; }
.sc-widget button, .sc-widget input, .sc-widget select { font:inherit; }
.sc-widget button, .sc-widget select, .sc-widget input { min-height:44px; }
.sc-widget button, .sc-widget select { cursor:pointer; }
.sc-skip { position:absolute; left:16px; top:-90px; padding:12px 18px; background:white; z-index:10; }
.sc-skip:focus { top:12px; }
.sc-masthead { max-width:1440px; margin:auto; padding:27px 52px 23px; display:flex; align-items:center; justify-content:space-between; border-bottom:1px solid var(--sc-line); gap:24px; }
.sc-brand { display:flex; align-items:center; gap:13px; text-decoration:none; font-size:10px; font-weight:650; line-height:1.6; letter-spacing:1.5px; }
.sc-brand-mark { font-family:Georgia,serif; font-size:30px; letter-spacing:-2px; border:1px solid var(--sc-ink); padding:2px 9px 2px 7px; }
.sc-masthead nav { display:flex; gap:32px; font-size:14px; }
.sc-masthead nav a { text-decoration:none; }
.sc-page main { max-width:1336px; margin:auto; padding:0 36px; }
.sc-hero { display:grid; grid-template-columns:1.15fr 1fr; gap:70px; padding:51px 0 44px; align-items:end; }
.sc-eyebrow { font-size:11px; font-weight:650; letter-spacing:1.65px; line-height:1.6; margin:0 0 16px; }
.sc-hero h1 { font-family:Georgia,"Times New Roman",serif; font-size:clamp(60px,6.7vw,94px); font-weight:400; line-height:.99; letter-spacing:-3.5px; margin:0; }
.sc-hero h1 em { font-weight:400; color:var(--sc-orange); }
.sc-hero-deck { max-width:460px; padding-bottom:3px; }
.sc-hero-deck>p:first-child { font-family:Georgia,serif; font-size:25px; line-height:1.35; margin:0 0 17px; }
.sc-hero-small { font-size:15px; color:var(--sc-muted); line-height:1.65; margin:0 0 23px; }
.sc-hero-meta { display:flex; flex-wrap:wrap; gap:8px 20px; font-size:11px; font-weight:600; text-transform:uppercase; letter-spacing:.65px; }
.sc-hero-meta span+span::before { content:"·"; margin-right:18px; color:var(--sc-orange); }
.sc-widget { container-type:inline-size; max-width:100%; }
.sc-loading, .sc-error { padding:32px; background:white; border:1px solid var(--sc-line); }
.sc-loading p, .sc-error p { margin:0 0 10px; }
.sc-lab { background:#fffdf7; border:1px solid var(--sc-line); }
.sc-lab-top { display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:10px; padding:17px 25px; border-bottom:1px solid var(--sc-line); }
.sc-chapter { margin:0; font-size:11px; letter-spacing:1.4px; text-transform:uppercase; font-weight:700; }
.sc-counter { display:flex; align-items:center; gap:14px; font-size:12px; color:var(--sc-muted); }
.sc-progress { display:flex; gap:3px; }
.sc-progress i { display:block; width:12px; height:3px; background:var(--sc-line); }
.sc-progress i[data-state="checked"] { background:#32625b; }
.sc-progress i[data-state="revealed"] { background:var(--sc-orange); }
.sc-workspace { display:grid; grid-template-columns:1.12fr 1fr; align-items:start; }
.sc-visual { margin:0; padding:25px 0 0 25px; }
.sc-visual img { width:100%; height:auto; display:block; background:var(--sc-ink); }
.sc-visual figcaption { font-size:12px; line-height:1.6; color:var(--sc-muted); padding:13px 0 16px; }
.sc-visual .sc-art-label { display:inline-block; color:var(--sc-orange); font-weight:700; letter-spacing:1px; font-size:10px; margin-right:8px; }
.sc-large-diagram { white-space:nowrap; }
.sc-givens { margin:0; padding:0 0 20px; }
.sc-givens div { display:flex; justify-content:space-between; gap:20px; border-top:1px solid var(--sc-line); padding:10px 0; font-size:12px; }
.sc-givens dt { color:var(--sc-muted); }
.sc-givens dd { text-align:right; margin:0; font-weight:600; }
.sc-question { padding:25px 27px 27px; min-width:0; }
.sc-question h2 { font-family:Georgia,serif; font-weight:400; font-size:31px; line-height:1.12; letter-spacing:-.6px; margin:0 0 17px; }
.sc-question .sc-prompt { font-size:14px; line-height:1.7; margin:0 0 23px; }
.sc-skill { color:var(--sc-orange); font-size:11px; font-weight:650; letter-spacing:.5px; margin:0 0 10px; }
.sc-answer-fields { display:grid; grid-template-columns:repeat(auto-fit,minmax(min(100%,170px),1fr)); gap:13px; margin-bottom:18px; }
.sc-field label { display:block; font-size:12px; font-weight:600; margin:0 0 7px; }
.sc-input-wrap { display:flex; align-items:center; border:1px solid #9e9e90; border-radius:4px; background:white; }
.sc-input-wrap:focus-within { outline:2px solid var(--sc-orange); outline-offset:2px; }
.sc-input-wrap input { width:100%; min-width:0; border:0; background:transparent; padding:10px 12px; font-size:19px; color:var(--sc-ink); border-radius:4px; outline:none !important; }
.sc-input-wrap span { font-size:12px; color:var(--sc-muted); padding-right:12px; white-space:nowrap; }
.sc-field input[aria-invalid="true"] { box-shadow:inset 0 0 0 2px #a12c24; }
.sc-actions { display:flex; gap:10px; align-items:center; flex-wrap:wrap; }
.sc-button { border:1px solid var(--sc-ink); color:white; background:var(--sc-ink); padding:10px 17px; border-radius:3px; font-size:13px !important; font-weight:600 !important; }
.sc-button:hover { background:#2c4953; }
.sc-button-secondary { background:transparent; color:var(--sc-ink); border-color:var(--sc-line); }
.sc-button-secondary:hover { color:var(--sc-ink); background:var(--sc-soft); }
.sc-button:disabled { cursor:default; opacity:.45; }
.sc-feedback { font-size:14px; margin:16px 0 0; padding:10px 13px; background:#f3e6dc; border-left:3px solid var(--sc-orange); }
.sc-feedback:empty { display:none; }
.sc-feedback[data-status="correct"] { background:#e4efea; border-color:#32625b; }
.sc-solution { margin-top:18px; padding:18px 19px; background:#eee7d8; border-radius:3px; }
.sc-solution h3 { margin:0 0 8px; font-size:18px; }
.sc-solution p { font-size:13px; margin:9px 0 0; }
.sc-formula { font-family:ui-monospace,SFMono-Regular,Consolas,monospace; font-size:12px !important; overflow-wrap:anywhere; line-height:1.6; }
.sc-details { border-top:1px solid var(--sc-line); margin-top:19px; padding-top:12px; font-size:12px; }
.sc-details summary { cursor:pointer; font-weight:600; min-height:32px; }
.sc-details p { margin:8px 0; }
.sc-details ul { padding-left:18px; }
.sc-details li { margin:7px 0; }
.sc-choice-group { border:0; padding:0; margin:0 0 18px; }
.sc-choice-group legend { font-size:12px; font-weight:600; margin-bottom:9px; }
.sc-choice { display:flex; align-items:start; gap:10px; padding:10px 12px; border:1px solid var(--sc-line); margin-bottom:8px; cursor:pointer; background:white; font-size:12px; line-height:1.5; }
.sc-choice input { min-height:20px; min-width:20px; margin:1px 0 0; accent-color:var(--sc-orange); }
.sc-lab-nav { display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:12px; padding:14px 25px; border-top:1px solid var(--sc-line); }
.sc-select-wrap { display:flex; align-items:center; gap:9px; font-size:12px; flex:1; }
.sc-select-wrap select { max-width:100%; min-width:0; background:white; color:var(--sc-ink); border:1px solid var(--sc-line); border-radius:3px; padding:8px; font-size:12px; }
.sc-nav-buttons { display:flex; gap:8px; }
.sc-lab-nav button { padding:8px 13px; }
.sc-index { padding:35px 0 0; }
.sc-section-top { display:flex; justify-content:space-between; align-items:baseline; gap:20px; margin-bottom:15px; }
.sc-section-top h2 { font-family:Georgia,serif; font-size:29px; font-weight:400; margin:0; }
.sc-section-top p { font-size:12px; color:var(--sc-muted); margin:0; }
.sc-challenge-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:9px; }
.sc-card { text-align:left; display:flex; align-items:start; gap:12px; min-height:85px !important; background:transparent; border:1px solid var(--sc-line); padding:14px 13px; color:var(--sc-ink); }
.sc-card:hover { background:#fffaf0; }
.sc-card[aria-current="step"] { border-color:var(--sc-orange); background:#fffaf0; box-shadow:inset 3px 0 var(--sc-orange); }
.sc-card-number { color:var(--sc-orange); font-family:Georgia,serif; font-size:22px; line-height:1.2; }
.sc-card-title { display:block; font-size:12px; font-weight:650; line-height:1.4; margin-bottom:5px; }
.sc-card-note { font-size:10px; line-height:1.4; text-transform:uppercase; letter-spacing:.6px; color:var(--sc-muted); }
.sc-explorer { border-top:1px solid var(--sc-line); padding-top:34px; margin-top:42px; }
.sc-explorer h2 { margin:0 0 10px; font-family:Georgia,serif; font-size:37px; font-weight:400; letter-spacing:-.6px; }
.sc-explorer-intro { display:flex; justify-content:space-between; align-items:start; gap:45px; margin-bottom:23px; }
.sc-explorer-intro>div:first-child { flex:1.3; }
.sc-explorer-intro>p { flex:1; margin:0; font-size:14px; line-height:1.7; max-width:450px; }
.sc-explorer .sc-axis-help { font-size:12px; color:var(--sc-muted); margin:0; }
.sc-scale-panel { background:var(--sc-ink); color:var(--sc-paper); padding:25px 28px 20px; }
.sc-scale-controls { display:flex; align-items:end; flex-wrap:wrap; gap:12px; margin-bottom:20px; }
.sc-scale-controls label { display:block; font-size:12px; margin-bottom:6px; }
.sc-scale-controls .sc-input-wrap { width:190px; }
.sc-scale-controls .sc-button { border-color:#a9bfc3; }
.sc-scale-controls .sc-reference-buttons { display:flex; gap:7px; flex-wrap:wrap; margin-left:auto; }
.sc-reference-buttons button { color:var(--sc-paper); border:1px solid #657e86; padding:7px 10px; background:transparent; font-size:11px; border-radius:3px; }
.sc-reference-buttons button:hover { background:#304953; }
.sc-axis-row { margin-top:16px; }
.sc-axis-heading { display:flex; justify-content:space-between; align-items:baseline; gap:15px; }
.sc-axis-heading h3 { font-size:13px; font-weight:600; margin:0; }
.sc-axis-heading p { font-size:12px; color:#bdd0d2; margin:0; }
.sc-axis-svg { display:block; width:100%; height:102px; overflow:visible; }
.sc-scale-readout { padding-top:13px; margin:0; font-size:13px; border-top:1px solid #48606a; color:#e6a074; }
.sc-scale-error { color:#ffc7a5; font-size:13px; margin:10px 0; }
.sc-scale-error:empty { display:none; }
.sc-reference-table { width:100%; border-collapse:collapse; font-size:12px; margin-top:13px; }
.sc-reference-table th { text-align:left; font-size:10px; text-transform:uppercase; letter-spacing:.7px; }
.sc-reference-table td, .sc-reference-table th { padding:12px 9px; border-bottom:1px solid var(--sc-line); vertical-align:top; }
.sc-reference-table td:first-child, .sc-reference-table th:first-child { padding-left:0; }
.sc-reference-table td:nth-child(2) { white-space:nowrap; }
.sc-readout-note { color:var(--sc-muted); font-size:11px; margin:10px 0 0; }
.sc-reading-note { display:grid; grid-template-columns:1fr 1.4fr; gap:60px; padding:43px 0 46px; border-top:1px solid var(--sc-line); margin-top:48px; }
.sc-reading-note h2 { font-family:Georgia,serif; font-size:35px; font-weight:400; line-height:1.12; margin:0; }
.sc-reading-note>div>p:not(.sc-eyebrow) { margin:0 0 15px; font-size:14px; color:var(--sc-muted); }
.sc-reading-note a { font-size:13px; }
.sc-footer { display:flex; flex-wrap:wrap; align-items:center; gap:12px 30px; max-width:1336px; padding:20px 36px 28px; margin:auto; font-size:11px; color:var(--sc-muted); border-top:1px solid var(--sc-line); }
.sc-footer p { margin:0; }
.sc-footer a { margin-left:auto; }
.sc-sr-only { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0; }
.sc-static { background:var(--sc-paper); margin:0; }
.sc-static .sc-only-print { display:none; }
.sc-static>main { max-width:880px; margin:0 auto; padding:34px 35px 70px; }
.sc-print-nav { display:flex; flex-wrap:wrap; gap:16px 26px; padding:20px 30px; border-bottom:1px solid var(--sc-line); font-size:13px; }
.sc-static h1 { font-family:Georgia,serif; font-size:54px; line-height:1.1; font-weight:400; margin:10px 0 22px; }
.sc-static h2 { font-family:Georgia,serif; font-size:29px; font-weight:400; line-height:1.15; }
.sc-print-intro { padding-bottom:30px; }
.sc-write-line { padding-top:25px; }
.sc-sheet { background:#fffdf7; border:1px solid var(--sc-line); margin:25px 0 45px; padding:30px; }
.sc-sheet h2 { margin:0 0 18px; }
.sc-sheet .sc-eyebrow { margin-bottom:7px; }
.sc-sheet figure { margin:0 0 19px; }
.sc-sheet img { display:block; max-width:100%; height:auto; }
.sc-sheet figcaption { font-size:11px; line-height:1.5; color:var(--sc-muted); margin-top:8px; }
.sc-sheet p { font-size:14px; }
.sc-paper-fields { background:var(--sc-paper); padding:4px 17px; margin:19px 0; }
.sc-paper-choices { list-style:none; padding-left:0; font-size:14px; }
.sc-paper-choices li { margin:10px 0; }
.sc-working-label { font-weight:600; margin-bottom:2px; }
.sc-working-lines { height:82px; background:repeating-linear-gradient(transparent 0,transparent 26px,#d7cdbb 26px,#d7cdbb 27px); }
.sc-extension { border-top:1px solid var(--sc-line); padding-top:12px; font-size:12px !important; }
.sc-paper-source { margin-top:15px; font-size:10px; }
.sc-paper-source ul { padding-left:17px; margin:3px 0; }
.sc-key-answer { font-size:22px !important; font-weight:600; color:var(--sc-orange); margin:16px 0 8px; }
.sc-source-entry { border-top:1px solid var(--sc-line); margin-top:32px; padding-top:28px; }
.sc-source-page p, .sc-source-page li { font-size:14px; }
.sc-source-page li { margin:12px 0; }
@container (max-width: 790px) {
  .sc-workspace { grid-template-columns:1fr; }
  .sc-visual { padding:18px 18px 0; }
  .sc-visual img { max-height:420px; object-fit:contain; }
  .sc-question { padding:8px 20px 24px; }
  .sc-question h2 { font-size:30px; }
  .sc-question .sc-prompt { font-size:15px; }
  .sc-choice { font-size:14px; }
  .sc-details { font-size:13px; }
  .sc-solution p { font-size:14px; }
  .sc-givens { padding-bottom:12px; }
  .sc-challenge-grid { grid-template-columns:repeat(3,1fr); }
  .sc-explorer-intro { display:block; }
  .sc-explorer-intro>p { max-width:none; margin-top:15px; }
  .sc-scale-controls .sc-reference-buttons { margin-left:0; }
  .sc-scale-panel { padding:22px 18px; }
}
@container (max-width: 450px) {
  .sc-lab-top { padding:13px 16px; gap:7px; }
  .sc-progress i { width:9px; }
  .sc-chapter { font-size:10px; letter-spacing:1px; }
  .sc-counter { font-size:10px; gap:8px; }
  .sc-visual { padding:13px 13px 0; }
  .sc-visual figcaption { font-size:12px; }
  .sc-givens div { gap:12px; font-size:12px; }
  .sc-question { padding:10px 15px 20px; }
  .sc-question h2 { font-size:28px; }
  .sc-lab-nav { padding:13px 15px; }
  .sc-select-wrap { flex-basis:100%; }
  .sc-select-wrap select { flex:1; }
  .sc-nav-buttons { justify-content:space-between; width:100%; }
  .sc-challenge-grid { grid-template-columns:repeat(2,1fr); }
  .sc-card { padding:13px 10px; gap:9px; }
  .sc-card-title { font-size:11px; }
  .sc-section-top { display:block; }
  .sc-section-top p { margin-top:4px; }
  .sc-explorer h2 { font-size:32px; }
  .sc-explorer-intro>p { font-size:13px; }
  .sc-axis-heading { align-items:start; }
  .sc-axis-heading p { max-width:140px; text-align:right; font-size:10px; }
  .sc-scale-panel { padding:19px 14px; }
  .sc-reference-table { font-size:10px; }
  .sc-reference-table th { font-size:9px; }
  .sc-reference-table td, .sc-reference-table th { padding:10px 5px; }
  .sc-reference-table td:nth-child(2) { white-space:normal; }
}
@media(max-width:700px) {
  .sc-masthead { padding:20px 20px 17px; gap:14px; }
  .sc-masthead nav { gap:16px; font-size:12px; }
  .sc-brand { gap:9px; font-size:8px; letter-spacing:1px; }
  .sc-brand-mark { font-size:25px; }
  .sc-page main { padding:0 18px; }
  .sc-hero { display:block; padding:33px 0 30px; }
  .sc-hero h1 { font-size:69px; letter-spacing:-2.5px; }
  .sc-hero-deck { margin-top:24px; max-width:none; }
  .sc-hero-deck>p:first-child { font-size:23px; }
  .sc-hero-meta { font-size:10px; gap:6px 12px; }
  .sc-hero-meta span+span::before { margin-right:10px; }
  .sc-hero .sc-eyebrow { font-size:9px; letter-spacing:1.3px; }
  .sc-reading-note { display:block; padding:31px 0; margin-top:34px; }
  .sc-reading-note h2 { font-size:31px; margin-bottom:23px; }
  .sc-footer { padding:20px 18px; font-size:10px; }
  .sc-footer a { margin-left:0; }
  .sc-static>main { padding:25px 16px 40px; }
  .sc-static h1 { font-size:43px; }
  .sc-sheet { padding:18px; }
  .sc-print-nav { padding:18px; font-size:11px; }
}
@media(prefers-reduced-motion:reduce) { .sc-page *, .sc-widget * { scroll-behavior:auto !important; animation:none !important; transition:none !important; } }
@media print {
  @page sc-fieldbook { size:letter; margin:13mm 15mm; }
  .sc-static { page:sc-fieldbook; color:#182d35; background:white; font-size:10pt; line-height:1.45; print-color-adjust:exact; -webkit-print-color-adjust:exact; }
  .sc-static>main { max-width:none; padding:0; }
  .sc-print-nav { display:none; }
  .sc-static .sc-no-print { display:none; }
  .sc-static .sc-only-print { display:inline; }
  .sc-static a { text-decoration:none; }
  .sc-print-intro { padding:22mm 4mm 0; break-after:page; }
  .sc-print-intro h1 { font-size:42pt; }
  .sc-print-intro p { font-size:12pt; line-height:1.6; }
  .sc-print-intro .sc-eyebrow { font-size:9pt; }
  .sc-sheet { border:0; margin:0; padding:0; break-before:page; break-inside:avoid; }
  .sc-sheet h2 { font-size:21pt; margin:0 0 3mm; }
  .sc-sheet .sc-eyebrow { font-size:8pt; margin:0 0 1.5mm; }
  .sc-sheet figure { margin:0 0 3mm; }
  .sc-sheet img { width:104mm; height:65mm; margin:0 auto; }
  .sc-sheet figcaption { font-size:7pt; line-height:1.35; margin:2mm 0 0; }
  .sc-sheet p { font-size:9.2pt; line-height:1.45; margin:3mm 0; }
  .sc-paper-fields { margin:3mm 0; padding:1mm 3mm; }
  .sc-working-lines { height:22mm; background:repeating-linear-gradient(transparent 0,transparent 7mm,#d7cdbb 7mm,#d7cdbb 7.2mm); }
  .sc-paper-choices, .sc-sheet li { font-size:8.8pt; line-height:1.4; }
  .sc-paper-choices li { margin:2mm 0; }
  .sc-extension { font-size:8.3pt !important; padding-top:2mm; }
  .sc-paper-source { font-size:7pt; margin-top:2mm; }
  .sc-paper-source li { font-size:7pt; line-height:1.3; }
  .sc-key-answer { font-size:15pt !important; margin:3mm 0 !important; }
  .sc-sheet .sc-formula { font-size:8pt !important; line-height:1.4; }
  .sc-sheet-heading { break-after:avoid; }
  .sc-source-entry { break-inside:avoid; }
}