/* Tutorial media uses the site's existing dark FILTRIX palette. */
.tutorial-video-section { margin: 36px 0; padding: 28px; background: #091d2c; border: 1px solid #24475b; }
.tutorial-video-heading { display: flex; justify-content: space-between; align-items: center; gap: 20px; margin-bottom: 24px; }
.tutorial-video-heading h2 { margin: 4px 0 0; font-size: clamp(20px, 2.2vw, 30px); }
.tutorial-video-badge { color: #82e4f5; font-size: 13px; white-space: nowrap; }
.tutorial-video-layout { display: grid; grid-template-columns: minmax(0, 1fr) 270px; gap: 24px; align-items: start; }
.tutorial-video-layout video { display: block; width: 100%; aspect-ratio: 16 / 9; background: #081722; object-fit: contain; }
.tutorial-video-chapters h3 { margin: 0 0 12px; font-size: 14px; color: #b2c9d6; }
.tutorial-video-chapters ol { padding: 0; margin: 0; list-style: none; }
.tutorial-video-chapters li { border-bottom: 1px solid #203c4e; }
.tutorial-video-chapters button { display: flex; gap: 12px; width: 100%; padding: 11px 0; text-align: left; line-height: 1.4; }
.tutorial-video-chapters button, .tutorial-transcript button { cursor: pointer; border: 0; background: transparent; color: #edf7fc; font: inherit; font-size: 13px; }
.tutorial-video-chapters button span { flex: 0 0 36px; color: #34d8f4; font-variant-numeric: tabular-nums; }
.tutorial-video-chapters button:hover, .tutorial-transcript button:hover { color: #34d8f4; }
.tutorial-video-section :focus-visible { outline: 2px solid #34d8f4; outline-offset: 4px; }
.tutorial-video-links { display: flex; flex-wrap: wrap; gap: 12px 22px; margin-top: 18px; font-size: 12px; color: #aec4d2; line-height: 1.6; }
.tutorial-video-links span { flex: 1 1 280px; }
.tutorial-video-links a { color: #75e4f6; text-underline-offset: 3px; }
.tutorial-video-status { color: #ffd18a; font-size: 13px; }
.tutorial-video-status:empty { display: none; }
.tutorial-transcript { margin-top: 20px; border-top: 1px solid #24475b; padding-top: 18px; }
.tutorial-transcript summary { cursor: pointer; font-weight: 600; color: #d6edf8; }
.tutorial-transcript > div { max-width: 850px; margin: 24px 0; }
.tutorial-transcript h3 { margin-bottom: 8px; }
.tutorial-transcript button { color: #75e4f6; font-size: 15px; font-weight: 600; padding: 0; text-align: left; }
.tutorial-transcript p { color: #b9ceda; line-height: 1.8; }
.tutorial-video-card-image { display: block; width: 100%; height: auto; aspect-ratio: 16/9; object-fit: cover; border-bottom: 1px solid #24475b; margin-bottom: 20px; }
.tutorial-video-card-badge { display: inline-block; color: #75e4f6; font-size: 12px; margin-bottom: 12px; }
.tutorial-jump-links { display: flex; gap: 12px; flex-wrap: wrap; margin: 18px 0 0; }
.tutorial-video-note { color: #adc6d5; font-size: 13px; line-height: 1.7; }

/* A numbered lesson sequence, with a consistent landscape media column. */
.learning-hero { grid-template-columns: minmax(0, 1fr) 350px; align-items: center; }
.learning-hero h1 { font-size: clamp(28px, 3.1vw, 43px); line-height: 1.25; letter-spacing: -0.025em; }
.learning-format { margin: 24px 0 0; color: #adc6d5; font-size: 12px; line-height: 1.8; }
.learning-format span { padding: 0 6px; color: #34d8f4; }
.learning-route { border-left: 1px solid #315365; padding-left: 28px; }
.learning-route ol { list-style: none; padding: 0; margin: 0; }
.learning-route li + li { border-top: 1px solid #244052; }
.learning-route a { display: flex; gap: 16px; padding: 15px 0; text-decoration: none; color: #edf7fc; }
.learning-route a > span { color: #34d8f4; font-size: 13px; font-variant-numeric: tabular-nums; padding-top: 2px; }
.learning-route strong { font-size: 15px; }
.learning-route small { display: block; margin-top: 5px; color: #abc3d1; line-height: 1.5; }
.learning-route > p { color: #8faebb; font-size: 12px; line-height: 1.7; margin: 16px 0 0; }
.learning-section-heading { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 24px; }
.learning-section-heading .section-title { margin-bottom: 0; }
.learning-section-heading > p { color: #abc3d1; font-size: 13px; line-height: 1.7; margin: 0; }
.learning-lessons { display: grid; gap: 20px; }
.learning-lesson { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); border: 1px solid #294859; background: #0c2231; overflow: hidden; border-radius: 12px; }
.learning-lesson-image { position: relative; align-self: center; margin: 22px; display: flex; flex-direction: column; justify-content: center; gap: 14px; aspect-ratio: 16 / 9; background: #081722; border: 1px solid #294859; color: #edf7fc; text-decoration: none; overflow: hidden; }
.learning-lesson-image img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: contain; }
.learning-lesson-image > strong { font-size: 28px; padding: 0 24px; }
.learning-lesson-image > span:not(.learning-play):not(.learning-duration) { padding: 0 24px; font-size: 12px; color: #75e4f6; }
.learning-cover-label { letter-spacing: 0.1em; }
.learning-play { position: absolute; right: 14px; top: 14px; display: grid; place-items: center; width: 36px; height: 36px; border: 1px solid #63d2e3; border-radius: 50%; background: #081722e6; color: #c3f5ff; font-size: 13px; }
.learning-duration { position: absolute; bottom: 0; right: 0; padding: 6px 10px; background: #081722; color: #bde8f1; font-size: 11px; border-top: 1px solid #294859; border-left: 1px solid #294859; }
.learning-lesson-body { padding: 26px 28px 26px 4px; min-width: 0; }
.learning-lesson-body .tutorial-card-top { margin-bottom: 12px; }
.learning-lesson h3 { font-size: 21px; line-height: 1.35; margin: 0 0 12px; }
.learning-lesson h3 a { color: #f1f7fa; text-decoration: none; }
.learning-lesson-body > p { color: #afc5d2; font-size: 14px; line-height: 1.7; margin: 0 0 18px; }
.learning-outcome { border-left: 2px solid #2ba7bf; padding-left: 12px; margin-bottom: 22px; }
.learning-outcome span { display: block; color: #81a6b7; font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 5px; }
.learning-outcome strong { color: #d6eaf4; font-size: 13px; font-weight: 500; }
.learning-lesson-actions { display: flex; flex-wrap: wrap; gap: 12px 24px; font-size: 13px; }
.learning-lesson-actions a, .learning-tool-map a, .learning-route a:hover strong { color: #75e4f6; text-underline-offset: 4px; }
.learning-lesson-actions a:first-child { font-weight: 700; }
.learning-tool-map { display: grid; grid-template-columns: 0.9fr 1fr 1fr; gap: 30px; margin: 64px 0; padding: 32px 0; border-top: 1px solid #315365; border-bottom: 1px solid #315365; }
.learning-tool-map h2, .learning-help h2 { font-size: 25px; line-height: 1.4; margin: 0; }
.learning-tool-map h3 { font-size: 17px; line-height: 1.5; margin: 0 0 12px; }
.learning-tool-map p, .learning-reference > div > p { color: #afc5d2; font-size: 14px; line-height: 1.8; }
.learning-tool-map a { display: inline-block; margin-top: 12px; font-size: 13px; }
.learning-reference { display: grid; grid-template-columns: 280px minmax(0, 1fr); gap: 48px; }
.learning-glossary { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 26px; margin: 0; }
.learning-glossary > div { padding-top: 14px; border-top: 1px solid #294859; }
.learning-glossary dt { color: #ddf1fa; font-size: 15px; font-weight: 600; margin-bottom: 8px; }
.learning-glossary dd { margin: 0; color: #afc5d2; font-size: 13px; line-height: 1.8; }
.learning-help { display: grid; grid-template-columns: 280px minmax(0, 1fr); gap: 48px; margin: 64px 0; padding: 30px; background: #102838; border: 1px solid #294859; border-radius: 12px; }
.learning-help-links a { display: block; padding: 14px 0; color: #abc3d1; text-decoration: none; font-size: 13px; }
.learning-help-links a + a { border-top: 1px solid #315365; }
.learning-help-links strong { display: block; margin-top: 7px; color: #75e4f6; font-weight: 600; }
.learning-app-note { display: block; margin-top: 12px; color: #abc3d1; line-height: 1.6; }
.learning-course-nav { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; margin: -16px 0 28px; }
.learning-course-nav a { padding: 14px; border: 1px solid #294859; color: #adc6d5; text-decoration: none; font-size: 13px; line-height: 1.5; }
.learning-course-nav span { color: #75e4f6; margin-right: 9px; }
.learning-course-nav a[aria-current="page"] { border-color: #34d8f4; background: #103846; color: #edf7fc; }
.learning-toc { padding: 22px 26px; border: 1px solid #294859; border-radius: 10px; margin-bottom: 28px; background: #0b2030; }
.learning-toc > strong { font-size: 13px; text-transform: uppercase; letter-spacing: 0.08em; color: #a6c4d5; }
.learning-toc > div { display: flex; flex-wrap: wrap; gap: 12px 26px; margin: 14px 0; }
.learning-toc a { color: #75e4f6; font-size: 13px; text-underline-offset: 4px; }
.learning-toc summary { cursor: pointer; color: #d2e4ee; font-size: 13px; padding: 8px 0; }
.learning-toc ol { padding-left: 22px; margin: 12px 0 0; color: #81a6b7; }
.learning-toc li { padding: 6px 0; }
.learning-command { margin-top: 20px; padding: 16px 20px; background: #061924; border: 1px solid #315365; }
.learning-command > span { color: #afc5d2; font-size: 12px; }
.learning-command pre { margin: 12px 0 0; white-space: pre-wrap; overflow-wrap: anywhere; color: #8aecf9; font-size: 14px; user-select: all; }
.learning-practice { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); gap: 36px; margin: 40px 0; padding: 32px; background: #0d2c3c; border: 1px solid #3d8ba0; border-radius: 12px; }
.learning-practice h2, .learning-checks h2 { font-size: 25px; line-height: 1.45; margin: 0 0 14px; }
.learning-practice p, .learning-practice li { color: #bfd4df; font-size: 14px; line-height: 1.8; }
.learning-practice ol { padding-left: 24px; margin: 0; }
.learning-practice li { padding: 0 0 16px 6px; }
.learning-practice li::marker { color: #75e4f6; font-weight: 700; }
.learning-practice .secondary-button { margin-top: 18px; font-size: 13px; }
.learning-done { margin: 10px 0 0; padding-top: 18px; border-top: 1px solid #315365; }
.learning-done strong { display: block; margin-bottom: 4px; color: #8aecf9; }
.learning-checks { margin: 40px 0; }
.learning-checks > p:not(.tutorial-eyebrow) { color: #abc3d1; font-size: 14px; margin-bottom: 22px; }
.learning-checks details { border-bottom: 1px solid #294859; }
.learning-checks summary { cursor: pointer; padding: 20px 4px; color: #dcedf5; font-size: 15px; line-height: 1.7; }
.learning-checks details[open] summary { color: #75e4f6; }
.learning-checks details p { color: #b4cdd9; font-size: 14px; line-height: 1.8; max-width: 900px; margin: 0 0 22px; padding: 0 22px; }
.learning-next { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin: 44px 0; }
.learning-next a { padding: 24px; border: 1px solid #315365; color: #dcedf5; text-decoration: none; border-radius: 10px; }
.learning-next a:last-child { background: #0d2c3c; border-color: #3d8ba0; }
.learning-next small { display: block; color: #75e4f6; margin-bottom: 9px; }
.learning-next strong { font-size: 19px; line-height: 1.5; }
.learning-next span { display: block; color: #abc3d1; font-size: 13px; margin-top: 8px; line-height: 1.6; }
.learning-hero :focus-visible, .learning-lessons :focus-visible, .learning-course-nav :focus-visible, .learning-toc :focus-visible, .learning-checks :focus-visible, .learning-next :focus-visible, .learning-help :focus-visible { outline: 2px solid #75e4f6; outline-offset: 4px; }
#learning-path, #practice, #knowledge-check, #troubleshooting, #tutorial-steps, .tutorial-step { scroll-margin-top: 110px; }
@media (max-width: 1000px) {
    .learning-hero { grid-template-columns: minmax(0, 1fr); }
    .learning-route { border-left: 0; border-top: 1px solid #315365; padding: 22px 0 0; }
    .learning-route ol { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 22px; }
    .learning-route li + li { border-top: 0; }
    .learning-tool-map { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .learning-tool-map > div:first-child { grid-column: 1 / -1; }
    .learning-reference, .learning-help { grid-template-columns: minmax(0, 1fr); gap: 24px; }
}
@media (max-width: 760px) {
    .learning-lesson { grid-template-columns: minmax(0, 1fr); }
    .learning-lesson-image { margin: 18px 18px 0; }
    .learning-lesson-body { padding: 24px; }
    .learning-section-heading { display: block; }
    .learning-section-heading > p { margin-top: 14px; }
    .learning-practice { grid-template-columns: minmax(0, 1fr); padding: 24px; gap: 24px; }
    .learning-course-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 480px) {
    .learning-route ol, .learning-tool-map, .learning-glossary, .learning-next { grid-template-columns: minmax(0, 1fr); }
    .learning-route a { padding: 12px 0; }
    .learning-hero h1 { font-size: 27px; }
    .learning-help { padding: 22px; }
    .learning-lesson-body { padding: 20px; }
    .learning-lesson h3 { font-size: 19px; }
    .learning-toc { padding: 18px; }
    .learning-course-nav a { padding: 12px 10px; font-size: 12px; }
}
@media (max-width: 1050px) {
    .tutorial-video-layout { grid-template-columns: minmax(0, 1fr); }
    .tutorial-video-chapters ol { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 20px; }
}
@media (max-width: 600px) {
    .tutorial-video-section { padding: 16px; margin: 24px 0; }
    .tutorial-video-heading { display: block; }
    .tutorial-video-badge { display: block; margin-top: 12px; }
    .tutorial-video-chapters ol { grid-template-columns: minmax(0, 1fr); }
}