:root {
  --paper: #f4f0e7;
  --paper-light: #faf8f2;
  --card: #fffdf8;
  --ink: #171916;
  --body: #343a35;
  --muted: #70766f;
  --line: #d7d1c5;
  --line-soft: #e9e4da;
  --moss: #2f4b40;
  --moss-soft: #e1e8e2;
  --cinnabar: #a33a2b;
  --shadow: 0 16px 42px rgba(42, 38, 30, .08);
  --max: 1440px;
  --reading: 880px;
  --header-h: 72px;
  --serif: "Songti SC", SimSun, STKaiti, KaiTi, serif;
  --sans: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--body); background: var(--paper); font: 16px/1.75 var(--sans); letter-spacing: 0; }
body::before { content: ""; position: fixed; inset: 0; pointer-events: none; opacity: .2; z-index: -1; background-image: radial-gradient(rgba(52,58,53,.15) .6px, transparent .6px); background-size: 5px 5px; }
img, video { display: block; max-width: 100%; }
a { color: inherit; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
[hidden] { display: none !important; }
.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; }
.skip-link { position: fixed; left: 16px; top: -60px; z-index: 1000; padding: 10px 14px; color: #fff; background: var(--ink); text-decoration: none; }
.skip-link:focus { top: 12px; }
:focus-visible { outline: 3px solid rgba(47,75,64,.32); outline-offset: 3px; }

.site-header { position: sticky; top: 0; z-index: 50; min-height: var(--header-h); color: var(--ink); background: rgba(250,248,242,.94); border-bottom: 1px solid rgba(23,25,22,.12); backdrop-filter: blur(12px); }
.header-inner { width: min(calc(100% - 48px), var(--max)); min-height: var(--header-h); margin: 0 auto; display: grid; grid-template-columns: 220px 1fr 42px; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 10px; width: max-content; text-decoration: none; }
.brand-mark { width: 36px; height: 36px; flex: 0 0 36px; border: 1px solid rgba(47,75,64,.35); border-radius: 50%; background: url("../images/ink/hero-landscape.png") 74% 5% / 245px auto no-repeat; }
.brand-copy { display: grid; }
.brand-name { color: var(--ink); font: 700 27px/1 var(--serif); }
.brand-name span { color: var(--moss); }
.brand small { margin-top: 4px; color: var(--muted); font-size: 10px; }
.desktop-nav { display: flex; justify-content: center; align-items: center; gap: clamp(16px, 2vw, 30px); }
.desktop-nav a { position: relative; padding: 24px 0 20px; font-size: 14px; text-decoration: none; white-space: nowrap; }
.desktop-nav a::after { content: ""; position: absolute; left: 50%; bottom: 14px; width: 0; height: 1px; background: var(--ink); transition: width .2s ease, left .2s ease; }
.desktop-nav a:hover::after, .desktop-nav a.is-active::after { left: 0; width: 100%; }
.menu-button { display: none; width: 42px; height: 42px; padding: 10px; border: 1px solid var(--line); background: var(--paper-light); }
.menu-button span { display: block; height: 1px; margin: 5px 0; background: var(--ink); }
.mobile-nav { width: min(calc(100% - 32px), 520px); margin: 0 auto 16px; padding: 10px; border: 1px solid var(--line); background: var(--card); box-shadow: var(--shadow); }
.mobile-nav a { display: block; padding: 10px 12px; text-decoration: none; border-bottom: 1px solid var(--line-soft); }

.hero { min-height: min(760px, calc(100vh - var(--header-h))); display: grid; place-items: center; position: relative; overflow: hidden; background: var(--paper-light) url("../images/ink/hero-landscape.png") center bottom / cover no-repeat; border-bottom: 1px solid var(--line); }
.hero::after { content: ""; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(90deg, rgba(250,248,242,.35), rgba(250,248,242,.04) 50%, rgba(250,248,242,.28)); }
.hero-content { position: relative; z-index: 1; width: min(calc(100% - 40px), 1760px); padding: 72px 0 110px; text-align: center; }
.seal-line, .eyebrow { margin: 0 0 14px; color: var(--moss); font-size: 12px; font-weight: 700; letter-spacing: .14em; }
.seal-line span { display: inline-block; margin-right: 10px; padding: 3px 8px; color: #fff; background: var(--cinnabar); letter-spacing: 0; }
.hero h1 { margin: 0; color: var(--ink); font: 800 clamp(48px, 6vw, 82px)/1.18 var(--serif); white-space: nowrap; }
.hero-copy { max-width: 1280px; margin: 24px auto 0; color: #454941; font-size: 18px; line-height: 1.9; white-space: nowrap; }
.value-tags { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px 26px; margin: 26px 0; padding: 0; list-style: none; }
.value-tags li::before { content: "◇"; margin-right: 7px; color: var(--cinnabar); }
.hero-search { width: min(100%, 700px); margin: 0 auto; display: grid; grid-template-columns: 1fr auto; padding: 7px; border: 1px solid rgba(23,25,22,.18); background: rgba(255,253,248,.92); box-shadow: 0 12px 30px rgba(35,31,24,.1); }
.hero-search input { min-width: 0; padding: 12px 16px; border: 0; color: var(--ink); background: transparent; outline: 0; }
.hero-actions { display: flex; justify-content: center; gap: 12px; margin-top: 16px; }

.button { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; padding: 10px 22px; border: 1px solid var(--ink); color: var(--ink); background: transparent; text-decoration: none; transition: transform .18s ease, background .18s ease, color .18s ease; }
.button:hover { transform: translateY(-2px); }
.button-dark { color: #fff; background: var(--ink); }
.button-dark:hover { background: var(--moss); border-color: var(--moss); }
.button-paper { background: rgba(255,253,248,.9); border-color: var(--line); }
.button-cinnabar { color: #fff; background: var(--cinnabar); border-color: var(--cinnabar); }
.button-cinnabar:hover { background: #842f24; border-color: #842f24; }

.section { padding: 96px 0; }
.section-inner { width: min(calc(100% - 48px), var(--max)); margin: 0 auto; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 34px; }
.section-heading h2, .center-heading h2, .case-copy h2, .resource-layout h2, .value-band-inner h2 { margin: 0; color: var(--ink); font: 700 clamp(32px, 3.8vw, 52px)/1.24 var(--serif); }
.section-heading p, .center-heading p { margin: 10px 0 0; color: var(--muted); }
.text-link { color: var(--moss); font-weight: 700; text-decoration: none; white-space: nowrap; }
.search-summary { min-height: 28px; margin: -18px 0 18px; color: var(--muted); }
.course-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin: -12px 0 22px; }
.course-toolbar .search-summary { min-height: 0; margin: 0; }
.series-filters { display: flex; flex-wrap: wrap; gap: 8px; }
.series-filter { min-height: 38px; padding: 7px 16px; border: 1px solid var(--line); color: var(--body); background: var(--card); transition: color .18s ease, border-color .18s ease, background .18s ease; }
.series-filter:hover { border-color: var(--moss); color: var(--moss); }
.series-filter.is-active { color: #fff; border-color: var(--moss); background: var(--moss); }

.course-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.course-card { min-width: 0; display: grid; grid-template-rows: auto 1fr; border: 1px solid var(--line); background: var(--card); box-shadow: 0 10px 26px rgba(43,39,32,.055); }
.course-card-media { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: var(--moss-soft); }
.course-card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s ease; }
.course-card:hover .course-card-media img { transform: scale(1.025); }
.course-code { position: absolute; left: 18px; top: 18px; padding: 5px 9px; color: #fff; background: rgba(23,25,22,.86); font-size: 12px; }
.course-status { position: absolute; right: 18px; top: 18px; padding: 5px 9px; color: var(--moss); border: 1px solid rgba(47,75,64,.3); background: rgba(250,248,242,.92); font-size: 12px; }
.course-card-body { display: flex; flex-direction: column; padding: 24px; }
.course-card h3 { margin: 0; color: var(--ink); font: 700 26px/1.35 var(--serif); }
.course-summary { margin: 12px 0 0; color: var(--body); }
.course-description { margin: 8px 0 20px; color: var(--muted); font-size: 14px; }
.course-meta { display: flex; flex-wrap: wrap; gap: 8px 14px; margin: auto 0 20px; padding: 16px 0 0; border-top: 1px solid var(--line-soft); color: var(--muted); font-size: 13px; }
.course-warning { margin: -8px 0 16px; color: var(--cinnabar); font-size: 13px; }
.course-card-actions { display: flex; gap: 10px; }
.course-card-actions .button { flex: 1; padding-inline: 12px; }
.empty-state { grid-column: 1 / -1; padding: 50px 20px; border: 1px solid var(--line); text-align: center; background: var(--card); }

.ink-value-band { position: relative; padding: 76px 0; color: #f8f4ea; background: var(--ink) url("../images/ink/trust-brush.png") center / cover no-repeat; }
.value-band-inner { width: min(calc(100% - 48px), var(--max)); margin: 0 auto; display: grid; grid-template-columns: .8fr 1.7fr; align-items: center; gap: 70px; }
.value-band-inner h2 { color: #fff; }
.value-band-inner .eyebrow { color: #c6d6cf; }
.course-values { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px 30px; margin: 0; padding: 0; list-style: none; }
.course-values li { padding: 14px 0; border-bottom: 1px solid rgba(255,255,255,.22); }
.course-values li::before { content: "○"; margin-right: 9px; color: #d7a297; }

.center-heading { max-width: 720px; margin: 0 auto 42px; text-align: center; }
.learning-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin: 0; padding: 0; list-style: none; }
.learning-steps li { position: relative; display: grid; grid-template-columns: 88px 1fr; align-items: center; gap: 20px; min-height: 180px; padding: 26px; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--line); }
.ink-number { display: grid; place-items: center; width: 76px; height: 76px; color: #fff; border-radius: 50%; background: var(--ink); font: italic 700 38px/1 var(--serif); }
.learning-steps h3 { margin: 0 0 7px; color: var(--ink); font: 700 24px/1.3 var(--serif); }
.learning-steps p { margin: 0; color: var(--muted); }

.case-section { background: var(--paper-light); border-block: 1px solid var(--line); }
.case-layout { display: grid; grid-template-columns: .78fr 1.5fr; gap: 58px; align-items: center; }
.case-copy p:not(.eyebrow) { margin: 20px 0 28px; color: var(--muted); }
.case-comparison { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.case-comparison figure { margin: 0; padding: 12px; border: 1px solid var(--line); background: var(--card); }
.case-comparison figcaption { padding: 5px 4px 12px; color: var(--ink); font-weight: 700; text-align: center; }
.case-comparison img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.case-vs { position: absolute; left: 50%; top: 50%; z-index: 2; display: grid; place-items: center; width: 48px; height: 48px; color: var(--moss); border: 1px solid var(--moss); border-radius: 50%; background: var(--paper-light); transform: translate(-50%, -30%); font-family: var(--serif); font-weight: 700; }
.resource-section { padding-block: 70px; }
.resource-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: end; }
.resource-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.resource-list span { padding: 14px 16px; border-bottom: 1px solid var(--line); }
.resource-list span::before { content: "✓"; margin-right: 9px; color: var(--cinnabar); }

.site-footer { padding: 52px 0 26px; color: #d6d2c8; background: #171916; }
.footer-inner { width: min(calc(100% - 48px), var(--max)); margin: 0 auto; display: grid; grid-template-columns: 1fr 1.6fr; gap: 34px 80px; }
.footer-brand .brand-name { color: #fff; }
.footer-brand-block p { max-width: 420px; color: #aaa99f; }
.site-footer nav { display: flex; flex-wrap: wrap; align-content: start; gap: 14px 28px; }
.site-footer nav a { text-decoration: none; }
.site-footer nav a:hover { color: #fff; }
.copyright { grid-column: 1 / -1; margin: 0; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.13); color: #888980; font-size: 13px; }

/* Course directory */
.directory-hero { padding: 90px 0 56px; border-bottom: 1px solid var(--line); background: var(--paper-light) url("../images/ink/hero-landscape.png") center 72% / cover no-repeat; }
.directory-hero-inner { width: min(calc(100% - 48px), var(--max)); margin: auto; }
.directory-hero h1 { max-width: 800px; margin: 0; color: var(--ink); font: 800 clamp(44px, 5vw, 72px)/1.15 var(--serif); }
.directory-hero p { max-width: 660px; margin: 18px 0 0; font-size: 18px; }
.directory-search { width: min(100%, 650px); margin-top: 28px; display: grid; grid-template-columns: 1fr auto; padding: 6px; border: 1px solid var(--line); background: rgba(255,253,248,.92); }
.directory-search input { min-width: 0; padding: 12px; border: 0; background: transparent; outline: 0; }

/* Information pages */
.info-main { width: min(calc(100% - 40px), 900px); margin: 72px auto 100px; padding: clamp(28px, 5vw, 68px); border: 1px solid var(--line); background: var(--card); box-shadow: var(--shadow); }
.info-main h1 { margin-top: 0; color: var(--ink); font: 700 clamp(38px, 5vw, 58px)/1.2 var(--serif); }
.info-main h2 { margin-top: 44px; color: var(--moss); font: 700 28px/1.35 var(--serif); }

/* Course article */
.article-header { position: sticky; top: 0; z-index: 50; min-height: 68px; border-bottom: 1px solid var(--line); background: rgba(250,248,242,.95); backdrop-filter: blur(12px); }
.article-header-inner { width: min(calc(100% - 48px), 1280px); min-height: 68px; margin: auto; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.article-nav { display: flex; gap: 24px; }
.article-nav a { color: var(--moss); text-decoration: none; }
.reading-progress { position: fixed; left: 0; top: 68px; z-index: 80; width: 0; height: 3px; background: var(--cinnabar); }
.article-hero { position: relative; min-height: 440px; display: grid; place-items: center; overflow: hidden; color: #fff; background: var(--ink); }
.article-hero > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .38; filter: grayscale(1) contrast(1.12); }
.article-hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(23,25,22,.82), rgba(23,25,22,.46)); }
.article-hero-content { position: relative; z-index: 1; width: min(calc(100% - 48px), 980px); padding: 70px 0; }
.article-kicker { color: #d4ddd7; font-weight: 700; }
.article-hero h1 { max-width: 900px; margin: 12px 0 24px; font: 800 clamp(40px, 5vw, 70px)/1.2 var(--serif); }
.article-meta { display: flex; flex-wrap: wrap; gap: 10px 22px; color: #e2e1dc; }
.article-shell { width: min(calc(100% - 48px), 1280px); margin: 0 auto; display: grid; grid-template-columns: 220px minmax(0, var(--reading)); justify-content: center; gap: 60px; padding: 70px 0 120px; }
.article-toc { position: sticky; top: 105px; align-self: start; max-height: calc(100vh - 135px); overflow: auto; padding-right: 18px; border-right: 1px solid var(--line); }
.article-toc strong { display: block; margin-bottom: 14px; color: var(--ink); }
.article-toc nav { display: grid; gap: 7px; }
.article-toc a { padding: 6px 10px; color: var(--muted); border-left: 2px solid transparent; text-decoration: none; font-size: 14px; }
.article-toc a:hover, .article-toc a.is-current { color: var(--moss); border-left-color: var(--moss); background: var(--moss-soft); }
.article-content { min-width: 0; padding: clamp(28px, 5vw, 64px); border: 1px solid var(--line); background: var(--card); box-shadow: var(--shadow); }
.article-content h2 { margin: 72px 0 24px; color: var(--ink); font: 700 clamp(30px, 3vw, 42px)/1.35 var(--serif); }
.article-content h2:first-child { margin-top: 0; }
.article-content h3 { margin: 42px 0 18px; color: var(--moss); font: 700 25px/1.4 var(--serif); }
.article-content h4 { margin: 26px 0 12px; color: var(--ink); font-size: 18px; }
.article-content p, .article-content li { line-height: 2; }
.article-content blockquote { margin: 24px 0; padding: 16px 20px; border-left: 3px solid var(--moss); background: #f3f5f1; }
.article-content blockquote p { margin: 0; }
.article-content hr { margin: 62px auto; width: 45%; border: 0; border-top: 1px solid var(--line); }
.prompt-showcase { margin: 34px 0 0; padding: 22px; border: 1px solid var(--line); background: #f8f7f2; }
.prompt-showcase-title { margin: 0 0 18px !important; color: var(--ink) !important; font-size: 20px !important; }
.prompt-grid { display: grid; grid-template-columns: 1fr 1fr; align-items: start; gap: 16px; }
.prompt-card { padding: 18px; border-top: 3px solid #7c827d; background: var(--card); }
.prompt-card-director { border-top-color: var(--moss); }
.prompt-card-header { display: flex; align-items: start; justify-content: space-between; gap: 12px; }
.prompt-card-header h4 { margin: 0; }
.prompt-text { margin: 14px 0 0; color: #52574f; }
.copy-button { flex: 0 0 auto; padding: 7px 11px; border: 1px solid var(--line); color: var(--moss); background: var(--paper-light); }
.copy-button:hover { color: #fff; border-color: var(--moss); background: var(--moss); }
.media-compare { margin: 0 0 42px; padding: 22px; border: 1px solid var(--line); border-top: 0; background: var(--card); }
.compare-heading { display: flex; justify-content: space-between; gap: 20px; margin-bottom: 18px; color: var(--ink); font-weight: 700; }
.compare-heading span { color: var(--muted); font-size: 13px; font-weight: 400; }
.compare-grid { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.compare-grid-single { grid-template-columns: minmax(0, 1fr); }
.compare-grid-single::after { display: none; }
.compare-grid::after { content: "VS"; position: absolute; left: 50%; top: 50%; z-index: 2; display: grid; place-items: center; width: 42px; height: 42px; color: var(--moss); border: 1px solid var(--moss); border-radius: 50%; background: var(--paper-light); transform: translate(-50%,-25%); font: 700 15px/1 var(--serif); }
.compare-item { min-width: 0; margin: 0; }
.compare-item figcaption { margin-bottom: 10px; color: var(--ink); font-weight: 700; text-align: center; }
.media-frame { aspect-ratio: 4 / 3; display: grid; place-items: center; overflow: hidden; background: #eef1ed; }
.media-frame img, .media-frame video { width: 100%; height: 100%; object-fit: contain; }
.media-missing { padding: 20px; color: var(--muted); text-align: center; }
.lesson-pagination { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 72px; padding-top: 24px; border-top: 1px solid var(--line); }
.lesson-link { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 16px 18px; border: 1px solid var(--line); background: var(--paper-light); text-decoration: none; }
.lesson-link:hover { border-color: var(--moss); }
.lesson-link span { color: var(--muted); font-size: 13px; }
.lesson-link strong { color: var(--ink); }
.lesson-link.is-disabled { opacity: .45; }
.copy-toast { position: fixed; right: 24px; bottom: 24px; z-index: 100; padding: 11px 16px; color: #fff; background: var(--moss); opacity: 0; transform: translateY(12px); pointer-events: none; transition: .2s ease; }
.copy-toast.is-visible { opacity: 1; transform: translateY(0); }

/* Account and protected course access */
.header-inner { grid-template-columns: 220px minmax(0, 1fr) auto 42px; }
.auth-nav { display: flex; align-items: center; justify-content: flex-end; gap: 8px; white-space: nowrap; }
.account-link { min-height: 36px; display: inline-flex; align-items: center; padding: 7px 12px; border: 1px solid var(--line); color: var(--ink); text-decoration: none; font-size: 13px; }
.account-link-primary { color: #fff; border-color: var(--moss); background: var(--moss); }
.account-link:hover { border-color: var(--moss); }
.account-page { min-height: 100vh; background: var(--paper-light); }
.account-shell { min-height: calc(100vh - var(--header-h)); display: grid; place-items: center; padding: 56px 20px 80px; }
.auth-card { width: min(100%, 520px); padding: clamp(28px, 5vw, 52px); border: 1px solid var(--line); background: rgba(255,253,248,.97); box-shadow: var(--shadow); }
.auth-card h1, .account-dashboard h1 { margin: 6px 0 12px; color: var(--ink); font: 700 clamp(36px, 5vw, 52px)/1.25 var(--serif); }
.auth-card > p:not(.eyebrow):not(.form-status) { margin-bottom: 28px; color: var(--muted); }
.account-form { display: grid; gap: 18px; }
.account-form label { display: grid; gap: 8px; color: var(--ink); font-weight: 700; }
.account-form input { width: 100%; min-height: 46px; padding: 10px 12px; border: 1px solid var(--line); color: var(--ink); background: #fff; outline: 0; }
.account-form input:focus { border-color: var(--moss); box-shadow: 0 0 0 3px rgba(57,78,66,.09); }
.account-form input:disabled { color: var(--muted); background: #f1f0eb; }
.account-form .button { width: 100%; margin-top: 4px; }
.captcha-field { min-height: 70px; display: grid; place-items: center; overflow: hidden; color: var(--muted); font-size: 14px; }
.captcha-field > div { max-width: 100%; }
.verification-resend { width: 100%; margin-top: 14px; border-color: var(--moss); color: var(--moss); }
.verification-resend:disabled, .account-form .button:disabled { cursor: not-allowed; opacity: .58; transform: none; }
.auth-card-links { display: flex; justify-content: space-between; gap: 20px; margin-top: 22px; }
.auth-card-links a { color: var(--moss); }
.form-status { margin: 0 0 18px; padding: 12px 14px; border-left: 3px solid var(--moss); background: #eef2ee; }
.form-status[data-kind="success"] { color: #315b43; border-color: #315b43; background: #edf5ef; }
.form-status[data-kind="warning"] { color: #76521e; border-color: #a37635; background: #fbf4e7; }
.form-status[data-kind="error"] { color: #7e3028; border-color: #9d3b31; background: #f9ece9; }
.account-dashboard { width: min(calc(100% - 40px), 1040px); margin: 0 auto; padding: 62px 0 100px; }
.account-dashboard > header { margin-bottom: 28px; }
.account-content { min-height: 260px; padding: clamp(24px, 4vw, 42px); border: 1px solid var(--line); background: var(--card); box-shadow: var(--shadow); }
.account-role { color: var(--muted); }
.account-empty { text-align: center; }
.account-empty h2 { color: var(--ink); font: 700 32px/1.3 var(--serif); }
.owned-course-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.owned-course-card { display: grid; gap: 12px; padding: 22px; border: 1px solid var(--line); background: var(--paper-light); }
.owned-course-card p { margin: 0; color: var(--cinnabar); font-weight: 800; }
.owned-course-card h2 { margin: 0; color: var(--ink); font: 700 25px/1.4 var(--serif); }
.owned-course-card span { color: var(--muted); }
.course-access-shell { width: min(calc(100% - 48px), 1280px); margin: 0 auto; display: grid; grid-template-columns: 220px minmax(0, var(--reading)); justify-content: center; gap: 60px; padding: 56px 0 110px; }
.course-access-main { min-width: 0; }
.course-preview-card, .course-gate, .protected-article-content { padding: clamp(28px, 5vw, 58px); border: 1px solid var(--line); background: var(--card); box-shadow: var(--shadow); }
.course-preview-card { margin-bottom: 20px; }
.course-preview-card h2, .course-gate h2 { margin: 0 0 14px; color: var(--ink); font: 700 clamp(28px, 4vw, 38px)/1.35 var(--serif); }
.course-preview-card p, .course-gate p { line-height: 1.9; }
.course-gate { text-align: center; background: #f7f5ef; }
.course-access-status { margin: 0 0 18px; padding: 10px 14px; color: var(--moss); border-left: 3px solid var(--moss); background: #eef2ee; }
.course-access-status[data-kind="warning"] { color: #76521e; border-color: #a37635; background: #fbf4e7; }
.course-access-status[data-kind="error"] { color: #7e3028; border-color: #9d3b31; background: #f9ece9; }
.protected-article-content h2 { margin: 72px 0 24px; color: var(--ink); font: 700 clamp(30px, 3vw, 42px)/1.35 var(--serif); }
.protected-article-content h2:first-child { margin-top: 0; }
.protected-article-content h3 { margin: 42px 0 18px; color: var(--moss); font: 700 25px/1.4 var(--serif); }
.protected-article-content h4 { margin: 26px 0 12px; color: var(--ink); font-size: 18px; }
.protected-article-content p, .protected-article-content li { line-height: 2; }
.protected-article-content blockquote { margin: 24px 0; padding: 16px 20px; border-left: 3px solid var(--moss); background: #f3f5f1; }
.progress-chip { display: inline-flex; margin-top: 14px; padding: 6px 10px; color: var(--moss); border: 1px solid var(--line); background: rgba(255,253,248,.8); font-size: 13px; }

.reveal { opacity: 1; transform: none; }

@media (max-width: 1180px) {
  .header-inner { grid-template-columns: 190px minmax(0, 1fr) auto 42px; gap: 14px; }
  .desktop-nav { gap: 14px; }
  .desktop-nav a { font-size: 13px; }
  .course-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .article-shell { grid-template-columns: 190px minmax(0, 1fr); gap: 28px; }
  .course-access-shell { grid-template-columns: 190px minmax(0, 1fr); gap: 28px; }
}

@media (max-width: 960px) {
  .header-inner { grid-template-columns: 1fr auto 42px; }
  .desktop-nav { display: none; }
  .menu-button { display: block; }
  .hero { min-height: 680px; }
  .value-band-inner, .case-layout, .resource-layout { grid-template-columns: 1fr; }
  .learning-steps { grid-template-columns: 1fr; }
  .learning-steps li { min-height: 0; }
  .article-shell { display: block; width: min(calc(100% - 30px), var(--reading)); padding-top: 24px; }
  .article-toc { position: static; max-height: none; margin-bottom: 18px; padding: 16px; border: 1px solid var(--line); background: var(--card); }
  .article-toc nav { display: flex; flex-wrap: wrap; }
  .course-access-shell { display: block; width: min(calc(100% - 30px), var(--reading)); padding-top: 24px; }
}

@media (max-width: 700px) {
  :root { --header-h: 64px; }
  body { font-size: 15px; }
  .header-inner, .section-inner, .value-band-inner, .footer-inner, .directory-hero-inner { width: min(calc(100% - 28px), var(--max)); }
  .brand-name { font-size: 23px; }
  .brand-mark { width: 32px; height: 32px; flex-basis: 32px; }
  .hero { min-height: calc(100svh - var(--header-h)); background-position: 58% bottom; }
  .hero-content { padding: 56px 0 84px; }
  .hero h1 { font-size: clamp(41px, 13vw, 60px); }
  .hero h1 { white-space: normal; }
  .hero-copy { font-size: 16px; white-space: normal; }
  .value-tags { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; text-align: left; }
  .hero-search { grid-template-columns: 1fr; }
  .hero-search .button { width: 100%; }
  .hero-actions { flex-direction: column; }
  .section { padding: 66px 0; }
  .section-heading { align-items: start; flex-direction: column; }
  .course-toolbar { align-items: flex-start; flex-direction: column; }
  .course-grid, .course-values, .case-comparison, .resource-list, .footer-inner, .prompt-grid, .compare-grid { grid-template-columns: 1fr; }
  .case-vs, .compare-grid::after { display: none; }
  .course-card-actions { flex-direction: column; }
  .lesson-pagination { grid-template-columns: 1fr; }
  .footer-inner { gap: 28px; }
  .copyright { grid-column: 1; }
  .directory-search { grid-template-columns: 1fr; }
  .article-header-inner { width: calc(100% - 28px); }
  .article-nav a:first-child { display: none; }
  .article-hero { min-height: 390px; }
  .article-hero-content { width: calc(100% - 30px); }
  .article-content { padding: 24px 18px; }
  .article-content h2 { margin-top: 54px; }
  .prompt-showcase, .media-compare { margin-left: -8px; margin-right: -8px; padding: 14px; }
  .prompt-card-header { display: block; }
  .copy-button { margin-top: 10px; }
  .compare-heading { display: block; }
  .compare-heading span { display: block; margin-top: 5px; }
  .auth-nav .account-link:not(.account-link-primary) { display: none; }
  .account-link { padding: 7px 10px; }
  .owned-course-grid { grid-template-columns: 1fr; }
  .course-preview-card, .course-gate, .protected-article-content { padding: 24px 18px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}