:root {
  color-scheme: dark;
  --ink: #f5f3ea;
  --muted: #9b9b92;
  --line: #2d302e;
  --panel: #151816;
  --green: #b8f36b;
  --green-dark: #16220f;
  --orange: #ff9b52;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; min-height: 100vh; background: #0b0d0c; color: var(--ink); font: 15px/1.55 Inter, ui-sans-serif, system-ui, sans-serif; }
button, audio { font: inherit; }
a { color: inherit; }
.site-header { height: 70px; padding: 0 clamp(20px, 5vw, 72px); display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.brand { text-decoration: none; font-weight: 750; letter-spacing: -.02em; display: flex; gap: 10px; align-items: center; }
.brand span { width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center; background: var(--green); color: #0b0d0c; }
nav { display: flex; gap: 24px; color: var(--muted); font-size: 14px; }
nav a { text-decoration: none; } nav a[aria-current="page"] { color: var(--ink); }
main { width: min(1380px, 92vw); margin: 0 auto; padding: 58px 0 80px; }
.hero { display: grid; grid-template-columns: minmax(0, 760px) auto; align-items: end; gap: 24px; padding-bottom: 45px; }
.hero .eyebrow, .hero h1, .hero .lede { grid-column: 1; }
.eyebrow { margin: 0 0 8px; color: var(--green); font-size: 12px; text-transform: uppercase; letter-spacing: .14em; font-weight: 750; }
h1 { margin: 0; max-width: 820px; font: 500 clamp(38px, 5vw, 70px)/1.03 Georgia, serif; letter-spacing: -.04em; }
.lede { max-width: 660px; margin: 18px 0 0; color: var(--muted); font-size: 17px; }
.filters { grid-column: 2; grid-row: 1 / span 3; display: flex; flex-wrap: wrap; justify-content: flex-end; padding: 4px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); }
.filter { border: 0; border-radius: 8px; padding: 10px 16px; color: var(--muted); background: transparent; cursor: pointer; }
.filter.active { color: #0b0d0c; background: var(--green); font-weight: 750; }
.workspace { display: grid; grid-template-columns: 300px minmax(0, 1fr); min-height: 620px; border: 1px solid var(--line); background: var(--panel); border-radius: 18px; overflow: hidden; }
aside { padding: 24px; border-right: 1px solid var(--line); background: #111311; }
.aside-title { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.aside-title h2 { margin: 0; font-size: 15px; }.aside-title span { color: var(--muted); }
.report-list { display: grid; gap: 8px; }
.report-item { width: 100%; padding: 15px; text-align: left; color: var(--ink); background: transparent; border: 1px solid transparent; border-radius: 12px; cursor: pointer; }
.report-item:hover, .report-item.active { background: #1b1f1b; border-color: var(--line); }
.report-item strong, .report-item span { display: block; }.report-item span { color: var(--muted); margin-top: 3px; font-size: 13px; }
.lesson { min-width: 0; padding: clamp(24px, 4vw, 54px); }
.lesson-heading { display: flex; justify-content: space-between; gap: 20px; align-items: start; }
.lesson-heading h2 { max-width: 780px; margin: 0; font: 500 clamp(27px, 3vw, 42px)/1.12 Georgia, serif; }
.completion-badge { padding: 7px 11px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font-size: 12px; }
.now-playing { min-width: 0; margin-top: 34px; padding: 24px; display: grid; grid-template-columns: 48px minmax(0, 1fr); gap: 0 16px; align-items: center; background: #0d100e; border: 1px solid var(--line); border-radius: 15px; }
.track-number { grid-row: span 2; width: 48px; height: 48px; display: grid; place-items: center; border-radius: 50%; background: var(--green); color: #10140d; font-weight: 800; }
.track-copy p { margin: 0; color: var(--muted); font-size: 12px; }.track-copy h3 { margin: 2px 0 0; font-size: 20px; }
audio { grid-column: 1 / -1; width: 100%; max-width: 100%; margin-top: 20px; }
.track-tools { grid-column: 1 / -1; display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.read-along-toggle, .source-link { min-height: 44px; display: flex; align-items: baseline; gap: 9px; padding: 9px 13px; color: var(--ink); background: transparent; border: 1px solid var(--line); border-radius: 9px; cursor: pointer; text-decoration: none; }
.read-along-toggle span, .source-link span { font-weight: 750; }.read-along-toggle small, .source-link small { color: var(--muted); font-size: 11px; }
.read-along-toggle:hover, .read-along-toggle[aria-expanded="true"] { border-color: var(--green); background: var(--green-dark); }
.source-link:hover { border-color: var(--green); background: var(--green-dark); }
.read-along { width: 100%; max-width: 100%; min-width: 0; margin-top: 14px; border: 1px solid #343a34; border-radius: 15px; overflow: hidden; background: #0d100e; }
.reader-heading { min-height: 74px; padding: 15px 18px; display: flex; align-items: center; justify-content: space-between; gap: 18px; border-bottom: 1px solid var(--line); }
.reader-heading h3 { margin: 0; font: 500 24px/1.1 Georgia, serif; }.reader-heading .eyebrow { margin-bottom: 4px; }
.reader-controls { display: flex; gap: 8px; }
.reader-controls button { min-height: 40px; padding: 8px 11px; color: var(--muted); background: transparent; border: 1px solid var(--line); border-radius: 8px; cursor: pointer; }
.reader-controls button[aria-pressed="true"] { color: var(--green); border-color: #405531; }
.reader-viewport { height: clamp(230px, 32vh, 310px); overflow-y: auto; overscroll-behavior: contain; padding: clamp(22px, 4vw, 38px); scroll-behavior: smooth; scrollbar-color: #4b514b transparent; }
.reader-text { max-width: 780px; margin: 0 auto; color: #8f948f; font: 500 clamp(18px, 2vw, 23px)/1.82 Georgia, serif; letter-spacing: .002em; }
.reader-segment { margin: 0 0 1.05em; }
.reader-word { padding: .08em .07em; border-radius: .18em; transition: color 120ms ease, background-color 120ms ease; cursor: text; }
.reader-word.current { color: #10140d; background: var(--green); box-shadow: 0 0 0 2px rgba(184, 243, 107, .12); }
.reader-word.past { color: #d9ddd5; }
.reader-status { margin: 70px auto; max-width: 440px; color: var(--muted); text-align: center; }
.reader-footer { min-height: 44px; padding: 10px 18px; display: flex; justify-content: space-between; gap: 16px; color: var(--muted); border-top: 1px solid var(--line); font-size: 11px; letter-spacing: .04em; }
.paths { margin-top: 36px; }.paths h3, .quiz-panel h3 { margin: 0; font-size: 24px; }.unlock-hint { color: var(--muted); }
.path-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 18px; }
.path-card { min-height: 125px; padding: 20px; text-align: left; color: var(--ink); background: #191c19; border: 1px solid var(--line); border-radius: 13px; cursor: pointer; }
.path-card strong, .path-card span { display: block; }.path-card strong { margin-bottom: 8px; font-size: 16px; }.path-card span { color: var(--muted); line-height: 1.4; }
.path-card:disabled { cursor: not-allowed; opacity: .42; }.path-card:not(:disabled):hover { border-color: var(--green); transform: translateY(-1px); }
.quiz-panel { margin-top: 32px; padding: 25px; border: 1px solid var(--line); border-radius: 15px; background: #111411; }
.quiz-heading { display: flex; justify-content: space-between; }.quiz-heading strong { color: var(--green); }
#quizForm { display: grid; gap: 10px; margin-top: 22px; } #quizForm fieldset { border: 0; padding: 0; margin: 0; } #quizForm legend { margin-bottom: 18px; font-size: 18px; }
.answer { display: flex; gap: 10px; padding: 13px; margin: 8px 0; border: 1px solid var(--line); border-radius: 10px; cursor: pointer; }
.answer:has(input:checked) { border-color: var(--green); background: var(--green-dark); }
.quiz-feedback { min-height: 24px; margin-top: 15px; }.primary { border: 0; border-radius: 9px; padding: 11px 17px; color: #10140d; background: var(--green); font-weight: 750; cursor: pointer; }
.practical-panel { margin-top: 32px; padding: clamp(20px, 3vw, 30px); border: 1px solid #35402f; border-radius: 15px; background: linear-gradient(145deg, #111611, #0d100e); }
.audio-lesson-panel { margin-top: 32px; padding: clamp(20px, 3vw, 30px); border: 1px solid #3f5138; border-radius: 15px; background: linear-gradient(145deg, #121812, #0d100e); }
.audio-lesson-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 20px; }.audio-lesson-heading h3 { margin: 3px 0 0; font: 500 28px/1.2 Georgia, serif; }.audio-lesson-heading > p { max-width: 540px; margin: 0; color: var(--muted); line-height: 1.55; }
.audio-lesson-tabs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 22px; }.audio-lesson-tabs button { display: grid; grid-template-columns: auto 1fr; gap: 10px; align-items: center; min-height: 68px; padding: 12px 14px; color: var(--muted); text-align: left; background: #151a15; border: 1px solid var(--line); border-radius: 10px; cursor: pointer; }.audio-lesson-tabs button[aria-selected="true"] { color: var(--ink); border-color: var(--green); background: #1a2319; }.audio-lesson-tabs span { color: var(--green); font: 600 11px/1 monospace; }.audio-lesson-tabs strong { line-height: 1.25; }
.audio-lesson-body > header h4 { margin: 4px 0 18px; font: 500 clamp(23px, 3vw, 34px)/1.15 Georgia, serif; }.lesson-concepts, .lesson-stress-test > div { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }.lesson-concept, .lesson-counter, .lesson-check-target { padding: 16px; border: 1px solid var(--line); border-radius: 10px; background: #121512; }.lesson-concept strong, .lesson-counter strong, .lesson-check-target strong { display: block; margin-bottom: 6px; color: var(--green); font-size: 12px; text-transform: uppercase; letter-spacing: .06em; }.lesson-concept p, .lesson-counter p, .lesson-check-target p { margin: 0; color: var(--muted); line-height: 1.55; }
.lesson-listen, .lesson-stress-test, .lesson-apply { margin-top: 24px; }.audio-lesson-body h5 { margin: 0 0 12px; font-size: 15px; }.lesson-moments { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }.lesson-moments button { padding: 15px; color: var(--ink); text-align: left; background: #171c17; border: 1px solid var(--line); border-radius: 10px; cursor: pointer; }.lesson-moments button:hover { border-color: var(--green); }.lesson-moments span { display: block; margin-bottom: 8px; color: var(--green); font-size: 12px; font-weight: 700; }.lesson-moments q { display: -webkit-box; overflow: hidden; color: var(--muted); line-height: 1.48; -webkit-box-orient: vertical; -webkit-line-clamp: 3; }.lesson-moments q::before, .lesson-moments q::after { content: none; }
.lesson-apply > p { color: var(--muted); line-height: 1.55; }.lesson-apply ol { margin: 10px 0 16px; padding-left: 22px; color: var(--muted); }.lesson-apply li { margin: 8px 0; line-height: 1.5; }
.practical-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; }
.practical-heading h3 { margin: 0; font: 500 28px/1.1 Georgia, serif; }.practical-heading > p { max-width: 390px; margin: 0; color: var(--muted); font-size: 13px; }
.practical-tabs { display: flex; gap: 6px; margin-top: 24px; padding: 4px; width: fit-content; background: #080b09; border: 1px solid var(--line); border-radius: 10px; }
.practical-tabs button { padding: 8px 12px; color: var(--muted); background: transparent; border: 0; border-radius: 7px; cursor: pointer; }
.practical-tabs button[aria-selected="true"] { color: #0b0d0c; background: var(--green); font-weight: 750; }
.practical-body h4 { margin: 25px 0 4px; font: 500 25px/1.2 Georgia, serif; }.practical-goal { max-width: 760px; margin: 0; color: #d3d6cf; }.practical-meta { margin: 10px 0 0; color: var(--green); font-size: 12px; text-transform: uppercase; letter-spacing: .09em; }
.practical-actions { display: grid; grid-template-columns: 1.15fr 1fr; gap: 10px; margin-top: 22px; }
.practical-auto, .practical-manual { min-height: 72px; padding: 14px 16px; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; text-align: left; border-radius: 11px; cursor: pointer; text-decoration: none; }
.practical-auto { color: #10140d; background: var(--green); border: 1px solid var(--green); }
.practical-manual { color: var(--ink); background: #171b17; border: 1px solid var(--line); }
.practical-auto strong, .practical-manual strong { font-size: 15px; }.practical-auto span, .practical-manual span { margin-top: 3px; font-size: 12px; opacity: .72; }
.practical-auto:hover { background: #c8ff83; }.practical-manual:hover, .practical-manual[aria-expanded="true"] { border-color: var(--green); background: var(--green-dark); }
.observe-preview { margin-top: 25px; }.observe-preview h5, .manual-setup h5 { margin: 0 0 9px; font-size: 13px; text-transform: uppercase; letter-spacing: .08em; }
.observe-preview ol, .manual-setup ol { margin: 0; padding-left: 19px; color: var(--muted); }.observe-preview li, .manual-setup li { padding-left: 5px; margin: 7px 0; }
.manual-setup { margin-top: 24px; padding: 19px; border: 1px solid var(--line); border-radius: 12px; background: #0b0e0c; }
.manual-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 18px; }.manual-heading .eyebrow { flex: 0 0 auto; }.manual-heading > p:last-child { max-width: 620px; margin: 0; color: var(--muted); font-size: 13px; }
.manual-setup > section { margin-top: 20px; }
.chart-links { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 19px; }.chart-links a { min-width: 180px; padding: 11px 13px; border: 1px solid var(--line); border-radius: 9px; text-decoration: none; background: #161a16; }.chart-links span, .chart-links small { display: block; }.chart-links span { font-weight: 700; }.chart-links small { margin-top: 2px; color: var(--muted); }.chart-links a:hover { border-color: var(--green); }
.practical-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; margin-top: 26px; }.practical-columns h5 { margin: 0 0 9px; font-size: 13px; text-transform: uppercase; letter-spacing: .08em; }.practical-columns ol { margin: 0; padding-left: 19px; color: var(--muted); }.practical-columns li { padding-left: 5px; margin: 7px 0; }
.pattern-test { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 24px; }.pattern-test p { margin: 0; padding: 15px; border-left: 2px solid var(--green); background: #141814; }.pattern-test strong, .pattern-test span { display: block; }.pattern-test strong { margin-bottom: 5px; font-size: 12px; text-transform: uppercase; letter-spacing: .07em; }.pattern-test span { color: var(--muted); }
.brief-notes { margin-top: 30px; border-top: 1px solid var(--line); padding-top: 22px; color: var(--muted); }.brief-notes summary { color: var(--ink); cursor: pointer; }.brief-notes div { max-width: 780px; margin-top: 18px; white-space: pre-wrap; }
.empty-state { grid-column: 2; display: grid; place-content: center; padding: 60px; max-width: 680px; }.empty-state h2 { margin: 0; font: 500 38px/1.15 Georgia, serif; }.empty-state p { color: var(--muted); }.empty-state a { color: var(--green); }
button:focus-visible, a:focus-visible, summary:focus-visible { outline: 3px solid var(--orange); outline-offset: 3px; }
@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; }.filters { grid-column: 1; grid-row: auto; justify-self: start; }
  .workspace { grid-template-columns: minmax(0, 1fr); } aside { border-right: 0; border-bottom: 1px solid var(--line); }
  .report-list { display: flex; overflow-x: auto; }.report-item { min-width: 220px; }.empty-state { grid-column: 1; }
}
@media (max-width: 560px) { main { width: 94vw; padding-top: 34px; }.site-header { padding: 0 16px; } nav { gap: 12px; }.path-grid { grid-template-columns: 1fr; }.lesson { padding: 22px; } }
@media (max-width: 560px) {
  .reader-heading { align-items: flex-start; }.reader-controls { flex-direction: column; }
  .reader-viewport { height: 280px; padding: 24px 18px; }.reader-footer { align-items: flex-start; flex-direction: column; gap: 2px; }
  .read-along-toggle small { display: none; }
  .source-link small { display: none; }.practical-heading, .audio-lesson-heading { align-items: start; flex-direction: column; }.practical-actions, .pattern-test, .lesson-concepts, .lesson-stress-test > div, .lesson-moments { grid-template-columns: 1fr; }.audio-lesson-tabs { grid-template-columns: 1fr; }.manual-heading { align-items: flex-start; flex-direction: column; gap: 3px; }
}
@media (prefers-reduced-motion: reduce) {
  .reader-viewport { scroll-behavior: auto; }
  .reader-word { transition: none; }
}