:root {
  --navy-950: #061d2a;
  --navy-900: #082536;
  --navy-800: #123e54;
  --navy-700: #20566e;
  --green-700: #08704d;
  --green-600: #0b8058;
  --green-100: #dff7ef;
  --green-50: #f0fbf7;
  --blue-50: #edf5fa;
  --ink: #162d3b;
  --muted: #526a78;
  --line: #cddde5;
  --paper: #ffffff;
  --canvas: #f7fafb;
  --danger: #a52d32;
  --warning: #fff6d9;
  --shadow: 0 20px 48px rgba(6, 29, 42, .09);
  --radius: 18px;
  --container: 1180px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.62;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; height: auto; }
svg { width: 1.15em; height: 1.15em; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
a { color: var(--green-700); text-underline-offset: .18em; }
a:hover { color: var(--navy-800); }
button, input, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid #f4bd28; outline-offset: 3px; border-radius: 4px; }
h1, h2, h3 { margin: 0 0 .55em; color: var(--navy-900); line-height: 1.08; letter-spacing: -.025em; }
h1 { font-size: clamp(2.55rem, 5.5vw, 4.9rem); }
h2 { font-size: clamp(1.85rem, 3.2vw, 2.85rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.55rem); }
p { margin: 0 0 1em; }
.container { width: min(calc(100% - 40px), var(--container)); margin-inline: auto; }
.narrow { max-width: 820px; }
.section { padding: clamp(72px, 9vw, 120px) 0; }
.section--tint { background: var(--canvas); }
.lead { color: var(--muted); font-size: clamp(1.1rem, 2.1vw, 1.35rem); }
.eyebrow { display: inline-block; margin-bottom: 14px; color: var(--green-700); font-size: .78rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.eyebrow--light { color: #66e8bd; }

.skip-link { position: fixed; z-index: 1000; top: 10px; left: 10px; padding: 10px 14px; color: var(--navy-950); background: #fff; transform: translateY(-160%); }
.skip-link:focus { transform: none; }
.site-header { position: sticky; z-index: 100; top: 0; color: #fff; background: rgba(6, 29, 42, .97); border-bottom: 1px solid rgba(255,255,255,.12); backdrop-filter: blur(12px); }
.header-row { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { flex: 0 0 auto; }
.brand img { width: 144px; }
.site-nav { display: flex; align-items: center; gap: 28px; }
.site-nav > a, .nav-chapters summary { color: #fff; font-size: .94rem; font-weight: 700; text-decoration: none; cursor: pointer; }
.site-nav > a:hover, .nav-chapters summary:hover { color: #66e8bd; }
.nav-chapters { position: relative; }
.nav-chapters summary { list-style: none; }
.nav-chapters summary::-webkit-details-marker { display: none; }
.nav-chapters summary::after { content: "⌄"; margin-left: 7px; }
.nav-chapters[open] summary::after { content: "⌃"; }
.nav-chapters > div { position: absolute; top: calc(100% + 16px); left: 50%; width: 340px; padding: 12px; background: #fff; border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); transform: translateX(-50%); }
.nav-chapters > div::before { content: ""; position: absolute; right: 0; bottom: 100%; left: 0; height: 18px; }
.nav-chapters a { display: block; padding: 9px 10px; color: var(--ink); border-radius: 7px; font-size: .88rem; font-weight: 650; line-height: 1.3; text-decoration: none; }
.nav-chapters a:hover { color: var(--green-700); background: var(--green-50); }
.menu-button { display: none; min-height: 44px; padding: 8px 10px; color: #fff; background: transparent; border: 1px solid rgba(255,255,255,.28); border-radius: 8px; }
.menu-lines, .menu-lines::before, .menu-lines::after { display: block; width: 20px; height: 2px; background: currentColor; }
.menu-lines { position: relative; margin-left: 8px; }
.menu-lines::before, .menu-lines::after { content: ""; position: absolute; left: 0; }
.menu-lines::before { top: -6px; }
.menu-lines::after { top: 6px; }

.hero { overflow: hidden; color: #e9f4f8; background: radial-gradient(circle at 90% 4%, #12845b 0 15%, transparent 15.2%), var(--navy-900); }
.hero-grid { min-height: 650px; display: grid; grid-template-columns: 1.02fr .98fr; align-items: center; gap: clamp(30px, 5vw, 78px); padding-block: 76px 84px; }
.hero h1, .chapter-hero h1 { color: #fff; }
.hero-subtitle { max-width: 680px; color: #cae0ea; font-size: clamp(1.28rem, 2.3vw, 1.75rem); }
.hero-promise { max-width: 670px; font-size: 1.08rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 30px 0 20px; }
.meta { color: #b3ccd7; font-size: .9rem; }
.hero-media { padding: 13px; background: #fff; border-radius: 24px; box-shadow: 0 35px 70px rgba(0,0,0,.28); transform: rotate(1.2deg); }
.hero-media img { aspect-ratio: 16 / 9; object-fit: cover; border-radius: 13px; }
.button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; padding: 11px 20px; border: 2px solid transparent; border-radius: 10px; font-weight: 800; line-height: 1.2; text-align: center; text-decoration: none; cursor: pointer; }
.button--primary { color: #fff; background: var(--green-600); border-color: var(--green-600); }
.button--primary:hover { color: #fff; background: #086c4a; border-color: #086c4a; }
.button--ghost { color: #fff; background: transparent; border-color: rgba(255,255,255,.55); }
.button--ghost:hover { color: #fff; border-color: #fff; }
.button--ghost-dark { color: var(--navy-900); background: #fff; border-color: var(--navy-900); }
.button--ghost-dark:hover { color: #fff; background: var(--navy-900); }
.button--secondary { color: var(--green-700); background: #fff; border-color: var(--green-700); }
.button--secondary:hover { color: #fff; background: var(--green-700); }
.button--small { min-height: 42px; padding: 8px 15px; font-size: .9rem; }

.progress-wrap { position: relative; z-index: 3; margin-top: -34px; }
.global-progress { padding: 20px 24px; background: #fff; border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); }
.global-progress__line { display: flex; justify-content: space-between; gap: 12px; margin-bottom: 9px; font-size: .9rem; }
.meter { overflow: hidden; height: 10px; background: #e5eef2; border-radius: 99px; }
.meter span { display: block; width: 0; height: 100%; background: linear-gradient(90deg, var(--green-600), #2cb98b); border-radius: inherit; transition: width .35s ease; }

.route-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 44px; }
.route-card { padding: 26px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 8px 30px rgba(6, 29, 42, .05); }
.route-card h3 { font-size: 1.25rem; }
.route-card p { margin-bottom: 0; color: var(--muted); font-size: .94rem; }
.section-heading { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: end; margin-bottom: 42px; }
.section-heading p { color: var(--muted); }
.chapter-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.chapter-card { position: relative; display: flex; flex-direction: column; padding: 30px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 10px 38px rgba(6, 29, 42, .05); }
.chapter-card__top { display: flex; justify-content: space-between; margin-bottom: 18px; color: var(--green-700); font-size: .78rem; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; }
.chapter-card h3 a { color: inherit; text-decoration: none; }
.chapter-card h3 a::after { content: ""; position: absolute; inset: 0; }
.chapter-card p { color: var(--muted); }
.chapter-card ul { margin: 5px 0 22px; padding-left: 20px; color: var(--muted); font-size: .91rem; }
.chapter-card__progress { margin-top: auto; margin-bottom: 15px; color: var(--muted); font-size: .82rem; font-weight: 700; }
.text-link { display: inline-flex; align-items: center; gap: 4px; font-weight: 800; }
.text-link svg { transition: transform .2s ease; }
.text-link:hover svg { transform: translateX(3px); }
.chapter-card .text-link { position: relative; z-index: 1; }
.split-panel { display: grid; grid-template-columns: 1.2fr .8fr; gap: 70px; align-items: center; }
.steps { display: grid; gap: 16px; margin: 32px 0 0; padding: 0; list-style: none; counter-reset: course-step; }
.steps li { display: grid; grid-template-columns: 38px 100px 1fr; gap: 10px; align-items: center; counter-increment: course-step; }
.steps li::before { content: counter(course-step); width: 34px; height: 34px; display: grid; place-items: center; color: #fff; background: var(--green-700); border-radius: 50%; font-size: .88rem; font-weight: 800; }
.steps span { color: var(--muted); }
.notice { padding: 28px; background: var(--blue-50); border-left: 5px solid var(--navy-700); border-radius: 4px 14px 14px 4px; }
.notice > strong { color: var(--navy-900); font-size: 1.15rem; }
.notice p { margin: 10px 0 16px; }

.chapter-hero { padding: 58px 0 70px; color: #dceaf0; background: var(--navy-900); }
.chapter-hero .container { max-width: 980px; }
.chapter-hero h1 { max-width: 900px; font-size: clamp(2.35rem, 4.8vw, 4rem); }
.chapter-hero p { max-width: 780px; font-size: 1.12rem; }
.chapter-hero--compact { padding-bottom: 60px; }
.back-link { display: block; margin-bottom: 34px; color: #dceaf0; font-size: .9rem; font-weight: 700; }
.back-link:hover { color: #66e8bd; }
.outcome { max-width: 900px; display: grid; grid-template-columns: 160px 1fr; gap: 18px; margin-top: 28px; padding: 18px 22px; color: var(--ink); background: #fff; border-radius: 12px; }
.outcome strong { color: var(--green-700); }
.progress-wrap--chapter { max-width: 980px; }
.course-layout { display: grid; grid-template-columns: 250px minmax(0, 760px); justify-content: center; gap: 70px; padding-block: 70px 110px; }
.lesson-nav { min-width: 0; }
.lesson-nav__inner { position: sticky; top: 104px; display: grid; gap: 4px; padding: 20px; background: var(--canvas); border: 1px solid var(--line); border-radius: 14px; }
.lesson-nav__inner > strong { margin-bottom: 8px; color: var(--navy-900); }
.lesson-nav a { display: grid; grid-template-columns: 30px 1fr; gap: 8px; padding: 7px 5px; color: var(--muted); font-size: .83rem; line-height: 1.35; text-decoration: none; border-radius: 5px; }
.lesson-nav a:hover { color: var(--green-700); background: #fff; }
.lesson-nav a span { color: var(--green-700); font-weight: 800; }
.local-meter { margin-top: 15px; padding-top: 13px; border-top: 1px solid var(--line); font-size: .78rem; }
.local-meter span, .local-meter strong { display: block; }
.local-meter strong { margin-top: 2px; color: var(--green-700); }
.lesson-list { min-width: 0; }
.lesson { padding: 0 0 80px; margin: 0 0 78px; border-bottom: 2px solid var(--line); }
.lesson-heading { display: grid; grid-template-columns: 58px 1fr; gap: 18px; align-items: start; }
.lesson-number { width: 52px; height: 52px; display: grid; place-items: center; color: #fff; background: var(--green-700); border-radius: 13px; font-weight: 850; }
.lesson h2 { font-size: clamp(1.8rem, 3vw, 2.55rem); }
.takeaway { color: var(--green-700); font-size: 1.1rem; font-weight: 700; }
.lesson-body { margin-top: 28px; }
.check-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 22px; margin: 26px 0; padding: 20px; background: var(--green-50); border-radius: 12px; list-style: none; }
.check-list li { display: flex; gap: 9px; align-items: flex-start; font-size: .94rem; }
.check-list svg { flex: 0 0 auto; margin-top: .25em; color: var(--green-700); }
.application { margin: 28px 0; padding: 20px 22px; background: var(--blue-50); border-left: 4px solid var(--navy-700); border-radius: 5px 12px 12px 5px; }
.application p { margin: 5px 0 0; }
.prompt-box { overflow: hidden; margin: 28px 0; color: #e9f4f8; background: var(--navy-900); border-radius: 14px; }
.prompt-box__head { display: flex; justify-content: space-between; align-items: center; gap: 15px; padding: 14px 18px; border-bottom: 1px solid rgba(255,255,255,.16); }
.prompt-box pre { overflow-x: auto; margin: 0; padding: 22px; white-space: pre-wrap; word-break: normal; }
.prompt-box code { font: .93rem/1.58 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.copy-button { min-height: 38px; display: inline-flex; align-items: center; gap: 7px; padding: 6px 10px; color: #fff; background: transparent; border: 1px solid rgba(255,255,255,.4); border-radius: 7px; font-size: .82rem; font-weight: 750; cursor: pointer; }
.copy-button:hover { background: rgba(255,255,255,.1); }
.quiz { margin: 28px 0; padding: 24px; background: var(--canvas); border: 1px solid var(--line); border-radius: 14px; }
.quiz fieldset { margin: 0 0 18px; padding: 0; border: 0; }
.quiz legend { color: var(--navy-900); font-size: 1.12rem; font-weight: 850; }
.quiz fieldset > p { margin: 5px 0 14px; }
.quiz-options { display: grid; gap: 9px; }
.quiz-option { display: grid; grid-template-columns: 20px 1fr; gap: 10px; align-items: center; padding: 11px 12px; background: #fff; border: 1px solid var(--line); border-radius: 8px; cursor: pointer; }
.quiz-option:hover { border-color: var(--green-600); }
.quiz-option input { width: 18px; height: 18px; accent-color: var(--green-700); }
.quiz-feedback { margin-top: 16px; padding: 15px 17px; background: var(--green-100); border-left: 4px solid var(--green-700); border-radius: 5px 9px 9px 5px; }
.quiz-feedback.is-wrong { background: #fdecec; border-left-color: var(--danger); }
.quiz-feedback p { margin: 4px 0 0; }
.practice { display: grid; grid-template-columns: 1fr auto; gap: 20px; align-items: center; margin-top: 28px; padding: 22px; border: 2px solid var(--green-700); border-radius: 14px; }
.practice p { margin: 4px 0 0; }
.complete-button { min-height: 46px; display: inline-flex; align-items: center; gap: 8px; padding: 9px 14px; color: var(--green-700); background: #fff; border: 1px solid var(--green-700); border-radius: 9px; font-size: .87rem; font-weight: 800; cursor: pointer; }
.complete-button[aria-pressed="true"] { color: #fff; background: var(--green-700); }
.chapter-task, .capstone { margin: 0 0 54px; padding: 32px; background: var(--blue-50); border-radius: var(--radius); }
.chapter-task h2, .capstone h2 { font-size: 2rem; }
.notes-label { display: block; margin: 20px 0 7px; font-weight: 800; }
textarea { width: 100%; padding: 13px; color: var(--ink); background: #fff; border: 1px solid #9db3bf; border-radius: 8px; resize: vertical; }
.chapter-pagination { display: flex; justify-content: space-between; gap: 16px; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; background: #fff; font-size: .88rem; }
th, td { padding: 12px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
thead th { color: #fff; background: var(--navy-900); }
tbody th { color: var(--navy-900); }
.source-layout { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 60px; align-items: start; }
.source-list { display: grid; gap: 16px; margin-top: 30px; padding-left: 28px; }
.source-list li { padding-left: 7px; }
.source-list a { display: block; font-weight: 800; overflow-wrap: anywhere; }
.source-list span { display: block; color: var(--muted); font-size: .78rem; overflow-wrap: anywhere; }

.site-footer { padding: 58px 0 20px; color: #bfd3dc; background: var(--navy-950); }
.footer-grid { display: grid; grid-template-columns: 1.2fr .8fr 1fr; gap: 60px; }
.footer-grid img { margin-bottom: 18px; }
.footer-grid strong { display: block; margin-bottom: 10px; color: #fff; }
.footer-grid a { display: block; margin-bottom: 7px; color: #d7e6ec; }
.footer-grid p { font-size: .88rem; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 44px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.13); font-size: .78rem; }
.toast { position: fixed; z-index: 200; right: 20px; bottom: 20px; max-width: min(360px, calc(100% - 40px)); padding: 12px 16px; color: #fff; background: var(--navy-900); border-radius: 8px; box-shadow: var(--shadow); opacity: 0; transform: translateY(16px); pointer-events: none; transition: opacity .2s ease, transform .2s ease; }
.toast.is-visible { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .hero-grid { min-height: 0; grid-template-columns: 1fr; }
  .hero-copy { max-width: 720px; }
  .hero-media { max-width: 760px; }
  .route-grid { grid-template-columns: repeat(2, 1fr); }
  .course-layout { grid-template-columns: 200px minmax(0, 1fr); gap: 34px; }
  .source-layout { grid-template-columns: 1fr; }
  .source-layout .notice { max-width: 650px; }
}

@media (max-width: 760px) {
  body { font-size: 16px; }
  .container { width: min(calc(100% - 28px), var(--container)); }
  .menu-button { display: inline-flex; align-items: center; }
  .site-nav { position: absolute; top: 100%; right: 0; left: 0; display: none; padding: 14px 20px 22px; background: var(--navy-950); border-top: 1px solid rgba(255,255,255,.1); }
  .site-nav.is-open { display: grid; gap: 13px; }
  .nav-chapters > div { position: static; width: auto; margin-top: 10px; transform: none; }
  .nav-chapters > div::before { display: none; }
  .hero-grid { padding-block: 56px 70px; }
  .hero-actions { display: grid; }
  .hero-actions .button { width: 100%; }
  .hero-media { transform: none; }
  .route-grid, .chapter-grid, .section-heading, .split-panel, .footer-grid { grid-template-columns: 1fr; }
  .section-heading, .split-panel { gap: 30px; }
  .course-layout { display: block; padding-top: 42px; }
  .lesson-nav { margin-bottom: 52px; }
  .lesson-nav__inner { position: static; }
  .lesson { margin-bottom: 58px; padding-bottom: 58px; }
  .check-list { grid-template-columns: 1fr; }
  .practice { grid-template-columns: 1fr; }
  .complete-button { justify-content: center; }
  .outcome { grid-template-columns: 1fr; gap: 3px; }
  .chapter-pagination { display: grid; }
  .footer-grid { gap: 28px; }
  .footer-bottom { display: grid; }
}

@media (max-width: 440px) {
  .route-grid { grid-template-columns: 1fr; }
  .chapter-card, .route-card { padding: 22px; }
  .lesson-heading { grid-template-columns: 1fr; }
  .lesson-number { width: 46px; height: 46px; }
  .global-progress { padding: 17px; }
  .global-progress__line { align-items: flex-start; }
  .chapter-task, .capstone { padding: 23px 18px; }
  .steps li { grid-template-columns: 38px 1fr; }
  .steps span { grid-column: 2; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

@media print {
  .site-header, .site-footer, .copy-button, .complete-button, .menu-button, .global-progress, .lesson-nav, .chapter-pagination, .toast { display: none !important; }
  body { color: #000; font-size: 11pt; }
  .chapter-hero { padding: 20px 0; color: #000; background: #fff; }
  .chapter-hero h1 { color: #000; }
  .course-layout { display: block; padding: 20px 0; }
  .lesson { break-inside: avoid; }
  .prompt-box { color: #000; background: #f3f3f3; }
}

.faq-list{display:grid;gap:.75rem}.faq-list details{background:#fff;border:1px solid #d8e3e7;border-radius:12px;padding:1rem 1.15rem}.faq-list summary{font-weight:750;cursor:pointer}.faq-list p{margin:.75rem 0 0}.answer-summary{border-left:4px solid #1aa36f;padding-left:1rem}