/* course.css
   The learning platform's reading layer on top of styles.css. Typography
   first: a serif for long-form reading, a narrow measure, generous leading,
   one quiet moss accent. No cards for the sake of cards. */
:root {
  --crs-serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --crs-moss: #9DBF8E;
  --crs-moss-deep: #5F8A57;
  --crs-ink: #F3EEFA;
  --crs-rule: rgba(255,255,255,0.12);
  --crs-measure: 42rem;
}
.crs { max-width: var(--crs-measure); margin: 0 auto; padding: 2.25rem 1.1rem 4.5rem; color: var(--crs-ink); }
@media (min-width: 700px) { .crs { padding: 3rem 2rem 5rem; } }

.crs-crumbs { font-family: 'Bricolage Grotesque', sans-serif; font-size: 0.8rem; letter-spacing: 0.04em; color: var(--text-muted); margin-bottom: 1.5rem; display: flex; flex-wrap: wrap; gap: 0.3rem; }
.crs-crumbs a { color: var(--sky); text-decoration: none; }
.crs-crumbs a:hover { color: var(--yellow); }
.crs-sep { opacity: 0.5; }
.crs-kicker { font-family: 'Bricolage Grotesque', sans-serif; font-size: 0.78rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--crs-moss); margin: 0 0 0.6rem; }
.crs h1 { font-family: 'Bricolage Grotesque', sans-serif; font-weight: 800; font-size: clamp(1.9rem, 5vw, 2.7rem); line-height: 1.12; letter-spacing: -0.02em; color: #fff; margin: 0 0 0.9rem; }
.crs h1 .crs-code { display: block; font-size: 0.55em; color: var(--crs-moss); letter-spacing: 0.08em; margin-bottom: 0.25rem; }
.crs-lead { font-family: var(--crs-serif); font-size: 1.18rem; line-height: 1.65; color: var(--offwhite); margin: 0 0 1.6rem; }
.crs-foot { font-size: 0.9rem; color: var(--text-muted); border-top: 1px solid var(--crs-rule); padding-top: 1.25rem; margin-top: 2.5rem; line-height: 1.7; }
.crs-foot a, .crs-body a, .crs-section a { color: var(--sky); }
.crs-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 0 0 2rem; }
.crs-actions .btn-primary, .crs-actions .btn-secondary { padding: 0.75rem 1.25rem; }
.crs-facts-row { display: flex; flex-wrap: wrap; gap: 1.2rem; font-family: 'Bricolage Grotesque', sans-serif; font-size: 0.85rem; color: var(--text-muted); margin-bottom: 1.5rem; }
.crs-facts-row span:empty { display: none; }
.crs-progress { border: 1px solid rgba(157,191,142,0.35); border-left: 3px solid var(--crs-moss); padding: 0.9rem 1.1rem; margin: 0 0 1.75rem; font-size: 0.95rem; line-height: 1.6; }
.crs-progress strong { color: var(--crs-moss); }
.crs-placeholder { font-style: italic; color: var(--text-muted); border-left: 2px dashed rgba(255,255,255,0.2); padding-left: 0.9rem; }

/* Years and modules: a list with rhythm, not a wall of tiles. */
.crs-level { margin-top: 2.75rem; }
.crs-level h2 { font-family: 'Bricolage Grotesque', sans-serif; font-size: 1.45rem; font-weight: 800; color: #fff; margin: 0 0 0.35rem; letter-spacing: -0.01em; }
.crs-year { color: var(--crs-moss); font-size: 0.8rem; letter-spacing: 0.12em; text-transform: uppercase; display: block; margin-bottom: 0.2rem; }
.crs-level-desc { color: var(--text-muted); margin: 0 0 1rem; font-size: 0.95rem; }
.crs-modules, .crs-lessons, .crs-courses { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--crs-rule); }
.crs-modules li, .crs-lessons li, .crs-courses li { border-bottom: 1px solid var(--crs-rule); }
.crs-modules a, .crs-modules .crs-coming, .crs-lessons a, .crs-courses a { display: grid; grid-template-columns: auto 1fr auto; gap: 0.35rem 0.9rem; align-items: baseline; padding: 0.85rem 0.25rem; color: inherit; text-decoration: none; }
.crs-courses a { grid-template-columns: 1fr; }
.crs-lessons a { grid-template-columns: 1fr auto; }
.crs-modules a:hover .crs-mtitle, .crs-lessons a:hover .crs-ltitle, .crs-courses a:hover .crs-mtitle { color: var(--yellow); }
.crs-modules .crs-coming { color: var(--text-muted); }
.crs-modules .crs-code { font-family: 'Bricolage Grotesque', sans-serif; font-weight: 700; font-size: 0.85rem; letter-spacing: 0.06em; color: var(--crs-moss); }
.crs-coming .crs-code { color: var(--text-muted); }
.crs-mtitle, .crs-ltitle { font-family: var(--crs-serif); font-size: 1.08rem; }
.crs-msub, .crs-lsum { grid-column: 1 / -1; font-size: 0.9rem; color: var(--text-muted); line-height: 1.5; }
.crs-state, .crs-lmeta { font-family: 'Bricolage Grotesque', sans-serif; font-size: 0.75rem; letter-spacing: 0.05em; text-transform: uppercase; color: var(--text-muted); white-space: nowrap; }
.crs-state-available { color: var(--crs-moss); }
.crs-unit { font-family: 'Bricolage Grotesque', sans-serif; font-size: 1rem; color: var(--sky); margin: 1.5rem 0 0.3rem; }
.crs-unit-sum { color: var(--text-muted); font-size: 0.92rem; margin: 0 0 0.6rem; }
.crs-pill { display: inline-block; font-family: 'Bricolage Grotesque', sans-serif; font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; padding: 0.15rem 0.5rem; border: 1px solid var(--crs-moss); color: var(--crs-moss); border-radius: 3px; vertical-align: middle; }

/* Reading: the part that has to feel like a book. */
.crs-section { margin-top: 2.5rem; }
.crs-section h2 { font-family: 'Bricolage Grotesque', sans-serif; font-weight: 800; font-size: 1.5rem; color: var(--yellow); letter-spacing: -0.01em; margin: 0 0 0.9rem; padding-top: 1.25rem; border-top: 1px solid var(--crs-rule); }
.crs-section h3 { font-family: 'Bricolage Grotesque', sans-serif; font-weight: 700; font-size: 1.15rem; color: var(--sky); margin: 1.75rem 0 0.5rem; }
.crs-section h4 { font-family: var(--crs-serif); font-weight: 600; font-size: 1.05rem; color: #fff; margin: 1.4rem 0 0.4rem; }
.crs-section p, .crs-body p, .crs-section li, .crs-question { font-family: var(--crs-serif); font-size: 1.12rem; line-height: 1.8; color: var(--offwhite); }
.crs-section p, .crs-body p { margin: 0 0 1.25rem; }
.crs-section ul, .crs-section ol { margin: 0 0 1.4rem 1.3rem; padding: 0; }
.crs-section li { margin-bottom: 0.45rem; }
.crs-section code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.88em; background: rgba(255,255,255,0.07); padding: 0.1em 0.35em; border-radius: 3px; }
.crs-quote { margin: 1.75rem 0; padding: 0.25rem 0 0.25rem 1.2rem; border-left: 3px solid var(--crs-moss); }
.crs-quote p { font-style: italic; color: #fff; }
.crs-quote footer { font-family: 'Bricolage Grotesque', sans-serif; font-size: 0.85rem; color: var(--text-muted); margin-top: -0.6rem; margin-bottom: 0.5rem; }
.crs-quote footer::before { content: 'From '; }
.crs-callout { margin: 1.75rem 0; padding: 1rem 1.2rem; border: 1px solid var(--crs-rule); border-left-width: 3px; border-left-color: var(--sky); background: rgba(255,255,255,0.03); }
.crs-callout strong { display: block; font-family: 'Bricolage Grotesque', sans-serif; font-size: 0.75rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--sky); margin-bottom: 0.45rem; }
.crs-callout p { font-size: 1.02rem; margin-bottom: 0.7rem; }
.crs-callout p:last-child { margin-bottom: 0; }
.crs-callout-task, .crs-callout-read_first { border-left-color: var(--crs-moss); }
.crs-callout-task strong, .crs-callout-read_first strong { color: var(--crs-moss); }
.crs-callout-think { border-left-color: var(--yellow); }
.crs-callout-think strong { color: var(--yellow); }
.crs-callout-warning { border-left-color: var(--pink); }
.crs-callout-warning strong { color: var(--pink); }
.crs-figure { margin: 1.75rem 0; }
.crs-figure img { width: 100%; height: auto; display: block; border: 1px solid var(--crs-rule); }
.crs-figure figcaption, .crs-video figcaption { font-family: 'Bricolage Grotesque', sans-serif; font-size: 0.85rem; color: var(--text-muted); margin-top: 0.5rem; line-height: 1.5; }
.crs-credit { opacity: 0.75; }
.crs-video { margin: 1.75rem 0; }
.crs-video-frame { position: relative; aspect-ratio: 16 / 9; background: #000; }
.crs-video-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.crs-table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.crs-table th, .crs-table td { text-align: left; padding: 0.55rem 0.7rem; border-bottom: 1px solid var(--crs-rule); vertical-align: top; font-family: var(--crs-serif); }
.crs-table th { font-family: 'Bricolage Grotesque', sans-serif; font-size: 0.78rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--crs-moss); }
.crs-rule { border: 0; border-top: 1px solid var(--crs-rule); margin: 2rem 0; }
.crs-cite a, .crs-fnref a { color: var(--crs-moss); text-decoration: none; font-family: 'Bricolage Grotesque', sans-serif; font-size: 0.72em; }
.crs-refs, .crs-fns { margin-top: 2.5rem; }
.crs-refs ol, .crs-fns ol { margin-left: 1.3rem; }
.crs-refs li, .crs-fns li { font-family: var(--crs-serif); font-size: 0.98rem; line-height: 1.65; color: var(--offwhite); margin-bottom: 0.6rem; }
.crs-refs cite { font-style: italic; }
.crs-verify { display: inline-block; font-family: 'Bricolage Grotesque', sans-serif; font-size: 0.68rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--yellow); border: 1px solid rgba(255,200,61,0.5); padding: 0.1rem 0.4rem; border-radius: 3px; margin-left: 0.3rem; vertical-align: middle; }
.crs-fnback { text-decoration: none; color: var(--crs-moss); margin-left: 0.3rem; }
.crs-gb { border-bottom: 1px dotted var(--crs-moss); color: var(--crs-moss) !important; text-decoration: none; }
.crs-lmeta-line { font-family: 'Bricolage Grotesque', sans-serif; font-size: 0.85rem; color: var(--text-muted); margin: -0.5rem 0 1.5rem; }

/* Reading lists and sources */
.crs-readings, .crs-sources { list-style: none; margin: 0; padding: 0; }
.crs-reading, .crs-source { padding: 0.9rem 0; border-bottom: 1px solid var(--crs-rule); }
.crs-reading-main { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.35rem 0.6rem; }
.crs-req { font-family: 'Bricolage Grotesque', sans-serif; font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; padding: 0.12rem 0.45rem; border-radius: 3px; border: 1px solid var(--crs-rule); color: var(--text-muted); }
.crs-req-required { color: var(--yellow); border-color: rgba(255,200,61,0.5); }
.crs-req-recommended { color: var(--crs-moss); border-color: rgba(157,191,142,0.5); }
.crs-reading-title, .crs-source-title { font-family: var(--crs-serif); font-size: 1.08rem; color: #fff; text-decoration: none; }
a.crs-reading-title:hover { color: var(--yellow); }
.crs-reading-by { color: var(--text-muted); font-size: 0.95rem; }
.crs-reading-pages { font-family: 'Bricolage Grotesque', sans-serif; font-size: 0.82rem; color: var(--crs-moss); }
.crs-reading-why { font-family: var(--crs-serif); font-size: 1rem !important; line-height: 1.6 !important; margin: 0.4rem 0 0.3rem !important; color: var(--offwhite); }
.crs-reading-meta { display: flex; flex-wrap: wrap; gap: 0.5rem 0.9rem; align-items: center; margin-top: 0.4rem; font-family: 'Bricolage Grotesque', sans-serif; font-size: 0.82rem; }
.crs-reading-meta a { color: var(--sky); text-decoration: none; border-bottom: 1px solid rgba(139,107,217,0.5); }
.crs-reading-meta a:hover { color: var(--yellow); }
.crs-avail { color: var(--text-muted); }
.crs-used { color: var(--text-muted); }
.crs-source-line { font-family: var(--crs-serif); font-size: 0.95rem; color: var(--text-muted); margin-top: 0.25rem; line-height: 1.6; }
.crs-source-line cite { font-style: italic; }
.crs-source-line a { color: var(--sky); }
.crs-source:target, .crs-reading:target { background: rgba(157,191,142,0.08); }

/* Assignments on a module page */
.crs-assign { border: 1px solid var(--crs-rule); padding: 1rem 1.2rem; margin: 1rem 0; }
.crs-assign h3 { margin-top: 0; }
.crs-question { font-style: italic; color: #fff; }
.crs-facts { margin: 0.5rem 0 1rem; }
.crs-facts div { display: grid; grid-template-columns: 6rem 1fr; gap: 0.5rem; padding: 0.35rem 0; border-top: 1px solid var(--crs-rule); font-size: 0.95rem; }
.crs-facts dt { font-family: 'Bricolage Grotesque', sans-serif; font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-muted); padding-top: 0.15rem; }
.crs-facts dd { margin: 0; font-family: var(--crs-serif); color: var(--offwhite); line-height: 1.6; }
.crs-objectives li { margin-bottom: 0.5rem; }

/* Lesson to lesson */
.crs-lesson-nav { display: flex; justify-content: space-between; gap: 1rem; margin-top: 3rem; padding-top: 1.25rem; border-top: 1px solid var(--crs-rule); font-family: 'Bricolage Grotesque', sans-serif; font-size: 0.95rem; }
.crs-lesson-nav a { color: var(--sky); text-decoration: none; max-width: 48%; }
.crs-lesson-nav a:hover { color: var(--yellow); }
.crs-next { text-align: right; margin-left: auto; }

/* Learner tools under a lesson */
.crs-tools h2 { color: var(--crs-moss); }
.crs-tool { padding: 1.1rem 0; border-bottom: 1px solid var(--crs-rule); }
.crs-tool h3 { margin-top: 0; }
.crs-tool-hint { font-size: 0.95rem !important; color: var(--text-muted) !important; margin-bottom: 0.8rem !important; }
.crs-ticks { list-style: none; margin: 0; padding: 0; }
.crs-ticks li { margin-bottom: 0.5rem; }
.crs-ticks label { display: flex; gap: 0.6rem; align-items: flex-start; font-family: var(--crs-serif); font-size: 1.05rem; cursor: pointer; }
.crs-ticks input { width: 1.15rem; height: 1.15rem; margin-top: 0.25rem; accent-color: var(--crs-moss); }
.crs-ticks em { color: var(--crs-moss); font-style: normal; font-family: 'Bricolage Grotesque', sans-serif; font-size: 0.82rem; }
.crs-prompts { display: grid; gap: 0.8rem; }
.crs-prompt span { display: block; font-family: 'Bricolage Grotesque', sans-serif; font-size: 0.8rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--crs-moss); margin-bottom: 0.3rem; }
.crs-tools textarea { width: 100%; box-sizing: border-box; background: rgba(0,0,0,0.28); border: 1px solid var(--crs-rule); border-radius: 6px; color: #fff; padding: 0.65rem 0.75rem; font-family: var(--crs-serif); font-size: 16px; line-height: 1.6; resize: vertical; }
.crs-tools textarea:focus { outline: none; border-color: var(--crs-moss); }
.crs-tool-foot { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 1rem; margin-top: 0.5rem; font-family: 'Bricolage Grotesque', sans-serif; font-size: 0.8rem; color: var(--text-muted); }
.crs-saved { min-height: 1em; }
.crs-task { padding: 0.8rem 0; border-top: 1px dashed var(--crs-rule); }
.crs-task-kind { font-family: 'Bricolage Grotesque', sans-serif !important; font-size: 0.75rem !important; letter-spacing: 0.08em; text-transform: uppercase; color: var(--crs-moss) !important; margin-bottom: 0.3rem !important; }
.crs-task-prompt { color: #fff !important; margin-bottom: 0.4rem !important; }
.crs-task-guidance { font-size: 0.98rem !important; color: var(--text-muted) !important; }
.crs-small { padding: 0.45rem 0.85rem; font-size: 0.82rem; }
.crs-gblist { list-style: none; margin: 0.5rem 0 0; padding: 0; }
.crs-gblist li { padding: 0.35rem 0; border-top: 1px solid var(--crs-rule); font-family: var(--crs-serif); }
.crs-gblist a { color: var(--sky); text-decoration: none; }
.crs-complete { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center; border-bottom: 0; }
.crs-complete .btn-primary[data-state="done"] { background: var(--crs-moss-deep); color: #fff; }