@import url('/lab/particles/style.css');

html[data-theme="light"] {
  color-scheme: light;
  --paper: #f3efe7; --ink: #11100e; --muted: #69665f;
  --signal: #d74b15; --line: rgba(17,16,14,.2);
}
body { background: var(--paper); }
.topbar { background: color-mix(in srgb, var(--paper) 94%, transparent); backdrop-filter: blur(12px); }
.topbar .brand-edition { font-size: 12px; }
.topbar nav { gap: 25px; }
.topbar nav a[aria-current="page"] { color: var(--signal); }
.theme-switch { display: grid; place-items: center; width: 40px; height: 40px; border: 1px solid var(--line); color: var(--ink); background: none; font-size: 21px; cursor: pointer; }
.theme-switch:hover { color: var(--signal); }
.page-progress { position: fixed; z-index: 11; top: 0; left: 0; height: 2px; width: 100%; transform: scaleX(0); transform-origin: left; background: var(--signal); }
.course-main { margin-inline: var(--gutter); }
.course-hero { position: relative; display: grid; grid-template-columns: 1.1fr 1fr; gap: 5vw; align-items: center; min-height: min(850px, 95svh); padding: 158px 0 80px; }
.course-hero h1 { font-size: clamp(64px, 7.4vw, 122px); }
.course-hero .eyebrow { color: var(--muted); }
.hero-description { max-width: 480px; font-size: 20px; line-height: 1.65; color: var(--muted); margin: 30px 0; }
.hero-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 12px 26px; font: 12px/1.7 var(--mono); color: var(--muted); }
.hero-meta span:first-child { color: var(--signal); }
.hero-meta i, .availability-dot { width: 5px; height: 5px; margin-right: 8px; display: inline-block; background: var(--signal); vertical-align: middle; }
.course-art { position: relative; height: clamp(330px, 34vw, 520px); min-width: 0; }
.course-art canvas { position: absolute; inset: 32px 0 48px; width: 100%; height: calc(100% - 80px); }
.art-label, .art-caption { position: absolute; left: 0; right: 0; display: flex; align-items: center; justify-content: space-between; gap: 16px; color: var(--muted); font: 12px/1.5 var(--mono); letter-spacing: .03em; }
.art-label { top: 0; }
.art-label span:first-child { color: var(--signal); }
.art-caption { bottom: 0; border-top: 1px solid var(--line); padding-top: 16px; }
.field-pause { width: 32px; height: 32px; display: grid; place-items: center; border: 1px solid var(--line); color: var(--muted); background: none; cursor: pointer; font-size: 15px; }
.field-pause:hover { color: var(--signal); }
.catalog-section, .course-section { border-top: 1px solid var(--line); padding: 38px 0 78px; }
.section-heading { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 18px; margin-bottom: 35px; }
.section-heading h2 { font: 13px/1.5 var(--mono); letter-spacing: .045em; text-transform: uppercase; margin: 0; }
.section-heading h2 span { color: var(--signal); margin-right: 14px; }
.section-heading > p { font: 12px/1.5 var(--mono); color: var(--muted); margin: 0; }
.featured-course { position: relative; display: grid; grid-template-columns: 80px 1fr 1fr; gap: 28px; padding: 44px 0 46px; border-block: 1px solid var(--line); }
.course-number { font: 13px/1.5 var(--mono); color: var(--muted); padding-top: 8px; }
.course-state { display: block; color: var(--signal); font: 12px/1.5 var(--mono); margin-bottom: 20px; }
.featured-course h3 { font-size: clamp(52px, 6vw, 96px); font-weight: 500; line-height: 1; letter-spacing: -.06em; margin: 0 0 20px; }
.featured-course h3 a:hover { color: var(--signal); }
.course-subtitle { font: 14px/1.6 var(--mono); color: var(--muted); margin: 0; }
.course-overview { display: flex; flex-direction: column; align-items: start; }
.course-overview > p { color: var(--muted); font-size: 18px; line-height: 1.7; margin: 0 0 22px; max-width: 530px; }
.course-tags { display: flex; flex-wrap: wrap; gap: 8px 16px; padding: 0; list-style: none; margin: 0 0 30px; color: var(--muted); font: 12px/1.5 var(--mono); }
.course-tags li::before { content: '/'; color: var(--signal); margin-right: 6px; }
.primary-action { display: inline-flex; align-items: center; justify-content: space-between; gap: 44px; min-height: 54px; padding: 16px 22px; background: var(--signal); color: #11100e; font: 700 14px/1.5 var(--mono); transition: filter .2s, transform .2s; }
html[data-theme="light"] .primary-action { color: #fff; }
.primary-action span { font-size: 22px; line-height: 1; }
.primary-action:hover { filter: brightness(1.13); transform: translateY(-2px); }
.course-overview .primary-action { margin-top: auto; }
.planned-course { display: grid; grid-template-columns: 80px 1fr 1fr auto; gap: 28px; align-items: start; padding: 30px 0; border-bottom: 1px solid var(--line); }
.planned-course h3 { font-size: 30px; letter-spacing: -.045em; font-weight: 400; margin: 0; }
.planned-course p { margin: 0; max-width: 380px; color: var(--muted); font-size: 16px; line-height: 1.6; }
.planned-state { font: 12px/1.5 var(--mono); color: var(--muted); padding-top: 6px; white-space: nowrap; }
.principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 48px; padding: 28px 0 70px; }
.principles article { padding-top: 22px; border-top: 1px solid var(--line); }
.principles small { font: 12px var(--mono); color: var(--signal); }
.principles h3 { font-size: 25px; letter-spacing: -.035em; font-weight: 400; margin: 20px 0 12px; }
.principles p { color: var(--muted); font-size: 16px; line-height: 1.7; margin: 0; max-width: 370px; }
.course-footer { margin-inline: var(--gutter); border-top: 1px solid var(--line); min-height: 104px; padding-block: 24px; display: flex; align-items: center; justify-content: space-between; gap: 25px; }
.footer-byline { font: 12px/1.7 var(--mono); color: var(--muted); margin: 0; }
.footer-links { display: flex; gap: 24px; font: 13px/1.5 var(--mono); }
.footer-links a:hover { color: var(--signal); }
.sound-toggle { color: var(--muted); }
.hero-actions { display: flex; align-items: center; gap: 28px; flex-wrap: wrap; margin-top: 34px; }
.secondary-action { display: inline-flex; align-items: center; gap: 16px; min-height: 44px; font: 13px/1.5 var(--mono); border-bottom: 1px solid var(--line); }
.secondary-action:hover { color: var(--signal); }
.course-numbers { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; padding-block: 35px 48px; border-top: 1px solid var(--line); }
.course-numbers > div { display: flex; align-items: baseline; gap: 20px; }
.course-numbers strong { font-size: clamp(45px, 5vw, 74px); font-weight: 400; line-height: 1; letter-spacing: -.06em; }
.course-numbers span { font: 13px/1.6 var(--mono); color: var(--muted); }
.format-intro { display: grid; grid-template-columns: 1.2fr 1fr; gap: 8vw; padding-block: 15px 28px; }
.format-intro h2, .program-heading h2, .start-course h2 { font-size: clamp(40px, 4.6vw, 74px); line-height: 1.05; }
.format-intro > p { max-width: 490px; font-size: 19px; line-height: 1.8; color: var(--muted); margin: 5px 0; }
.course-section .principles { padding-bottom: 0; }
.program-heading { display: flex; justify-content: space-between; gap: 40px; align-items: end; padding-bottom: 25px; }
.program-heading p { color: var(--muted); max-width: 365px; font-size: 17px; line-height: 1.7; margin-bottom: 35px; }
.curriculum { border-top: 1px solid var(--line); }
.track { border-bottom: 1px solid var(--line); scroll-margin-top: 110px; }
.track summary { display: grid; grid-template-columns: 60px 1fr auto 30px; align-items: center; gap: 20px; list-style: none; padding: 28px 0; cursor: pointer; }
.track summary::-webkit-details-marker { display: none; }
.track summary:focus-visible { outline: 2px solid var(--signal); outline-offset: 5px; }
.track-index { font: 13px var(--mono); color: var(--signal); }
.track summary h3 { font-size: 26px; letter-spacing: -.035em; font-weight: 400; margin: 0; }
.track-count { color: var(--muted); font: 12px var(--mono); }
.track-toggle { font-size: 25px; color: var(--signal); text-align: right; }
.track[open] .track-toggle { transform: rotate(45deg); }
.track summary:hover h3 { color: var(--signal); }
.track-description { color: var(--muted); font-size: 17px; line-height: 1.7; max-width: 800px; margin: 0 0 25px 80px; }
.module-list { list-style: none; display: grid; grid-template-columns: repeat(2, 1fr); column-gap: 45px; padding: 0 0 35px 80px; margin: 0; }
.module-list li { display: flex; align-items: baseline; gap: 18px; font-size: 16px; line-height: 1.6; padding-block: 13px; border-top: 1px solid var(--line); }
.module-list li span { color: var(--muted); font: 12px var(--mono); }
.start-course { display: grid; grid-template-columns: 1.2fr 1fr; align-items: center; gap: 8vw; padding: 20px 0 100px; }
.start-course .eyebrow { color: var(--muted); }
.start-course p:not(.eyebrow) { color: var(--muted); font-size: 18px; line-height: 1.7; max-width: 440px; margin: 0 0 28px; }
#catalog, #format, #program, #start { scroll-margin-top: 115px; }
@media (max-width: 1100px) {
  .course-hero { gap: 24px; }
  .topbar .brand-edition, .topbar .brand-slash { display: none; }
  .featured-course { grid-template-columns: 42px 1fr 1.2fr; }
  .planned-course { grid-template-columns: 42px 1fr 1.2fr; }
  .planned-state { grid-column: 2; }
  .course-numbers > div { flex-direction: column; gap: 12px; }
  .course-footer { flex-wrap: wrap; }
  .course-footer .sound-controls { margin-left: auto; }
}
@media (max-width: 760px) {
  .topbar nav > a:not(.contact-link) { display: inline-flex; }
  .topbar nav { gap: 18px; }
  .topbar nav .desktop-nav { display: none !important; }
  .topbar nav a { font-size: 12px; }
  .course-hero { min-height: 0; grid-template-columns: 1fr; padding: 125px 0 36px; gap: 40px; }
  .course-hero h1 { font-size: clamp(58px, 12vw, 88px); }
  .hero-description { font-size: 18px; margin-block: 25px; }
  .hero-meta { font-size: 12px; gap: 10px 20px; }
  .course-art { height: 290px; }
  .catalog-section, .course-section { padding: 28px 0 45px; }
  .featured-course { grid-template-columns: 28px 1fr; gap: 15px; padding-block: 30px; }
  .featured-course h3 { font-size: 64px; }
  .course-overview { grid-column: 2; padding-top: 12px; }
  .course-overview > p { font-size: 16px; }
  .planned-course { grid-template-columns: 28px 1fr; gap: 15px; }
  .planned-course h3 { font-size: 29px; }
  .planned-course > p, .planned-state { grid-column: 2; }
  .principles { grid-template-columns: 1fr; gap: 32px; padding-block: 0 40px; }
  .principles h3 { margin-top: 16px; }
  .principles p { max-width: none; }
  .course-footer { align-items: flex-start; gap: 22px; padding-block: 26px; }
  .course-footer .sound-controls { width: 100%; margin-left: 0; }
  .footer-links { font-size: 12px; gap: 18px; }
  .course-numbers { gap: 16px; }
  .course-numbers strong { font-size: 47px; }
  .course-numbers span { font-size: 12px; }
  .format-intro, .start-course { grid-template-columns: 1fr; gap: 10px; }
  .format-intro h2, .program-heading h2, .start-course h2 { font-size: clamp(40px, 9vw, 65px); }
  .format-intro > p { font-size: 17px; margin-bottom: 25px; }
  .program-heading { display: block; padding-bottom: 0; }
  .program-heading p { margin-block: 0 25px; }
  .track summary { grid-template-columns: 25px 1fr 22px; gap: 12px; padding-block: 24px; }
  .track summary h3 { font-size: 23px; }
  .track-count { grid-column: 2; grid-row: 2; }
  .track-toggle { grid-column: 3; grid-row: 1 / 3; }
  .track-description { margin-left: 37px; font-size: 16px; }
  .module-list { grid-template-columns: 1fr; padding-left: 37px; }
  .start-course { padding-bottom: 55px; }
}
@media (max-width: 380px) {
  .topbar .brand { font-size: 12px; }
  .topbar nav { gap: 12px; }
  .theme-switch { width: 32px; height: 36px; }
}

/* Continuous narrative: copy scrolls on the left, the point field stays right. */
.course-main { width: calc(50% - var(--gutter)); margin-right: 0; }
.course-hero { display: flex; align-items: center; min-height: 100svh; padding: 160px 0 105px; }
.course-hero > div { width: 100%; }
.course-hero h1 { font-size: clamp(60px, 6.9vw, 116px); }
.course-art { position: fixed; z-index: 2; left: 55%; right: var(--gutter); top: 124px; bottom: 40px; height: auto; }
.course-art canvas { inset: 40px 0 65px; height: calc(100% - 105px); }
.art-label { align-items: flex-start; }
.art-label span:last-child { text-align: right; }
.art-caption { min-height: 49px; }
.art-caption > span { max-width: calc(100% - 48px); }
.course-art .field-pause { flex-shrink: 0; width: 40px; height: 40px; }
.catalog-section { padding-bottom: 0; }
.section-heading { align-items: start; flex-direction: column; gap: 12px; }
.featured-course { grid-template-columns: 34px 1fr; gap: 22px; min-height: 76svh; align-content: center; padding: 70px 0; }
.course-overview { grid-column: 2; padding-top: 10px; }
.course-overview > p { max-width: 490px; }
.planned-course { grid-template-columns: 34px 1fr; gap: 22px; align-content: center; min-height: 70svh; padding: 70px 0; }
.planned-course h3 { font-size: clamp(38px, 4.6vw, 72px); }
.planned-course > p, .planned-state { grid-column: 2; }
.planned-course > p { max-width: 460px; font-size: 18px; }
.learning-principles { min-height: 90svh; display: flex; flex-direction: column; justify-content: center; padding-top: 70px; }
.principles { grid-template-columns: 1fr; gap: 26px; padding-bottom: 50px; }
.principles h3 { margin-block: 14px 9px; }
.principles p { max-width: 500px; }
.course-numbers { gap: 22px; }
.course-numbers > div { flex-direction: column; gap: 12px; }
.course-numbers strong { font-size: clamp(42px, 4.2vw, 66px); }
.course-section { min-height: 100svh; padding: 70px 0; }
.format-intro { grid-template-columns: 1fr; gap: 0; }
.format-intro > p { font-size: 18px; margin-block: 0 18px; }
.format-intro h2, .program-heading h2, .start-course h2 { font-size: clamp(38px, 4.2vw, 68px); }
.program-heading { display: block; padding: 10px 0 0; }
.program-heading p { max-width: 480px; }
.track summary { grid-template-columns: 25px 1fr 25px; gap: 12px; }
.track summary h3 { font-size: 24px; }
.track-count { grid-column: 2; grid-row: 2; }
.track-toggle { grid-column: 3; grid-row: 1 / 3; }
.track-description { margin-left: 37px; }
.module-list { grid-template-columns: 1fr; padding-left: 37px; }
.start-course { min-height: 90svh; grid-template-columns: 1fr; align-content: center; gap: 0; padding-block: 80px; }
.course-footer { position: relative; z-index: 3; width: calc(50% - var(--gutter)); flex-wrap: wrap; align-items: start; }
.course-footer .sound-controls { width: 100%; margin-left: 0; }
@media (min-width: 761px) and (max-height: 600px) {
  .course-art { bottom: 24px; }
  .art-label span:first-child { display: none; }
  .art-label { justify-content: flex-end; }
}
@media (max-width: 760px) {
  .course-art { z-index: 6; left: var(--gutter); right: var(--gutter); height: min(33svh, 280px); bottom: auto; background: var(--paper); }
  .course-art::before { content: ''; position: absolute; inset: -20px calc(-1 * var(--gutter)) -10px; background: var(--paper); z-index: -1; border-bottom: 1px solid var(--line); }
  .course-art canvas { inset: 23px 0 40px; height: calc(100% - 63px); }
  .art-label { font-size: 12px; }
  .art-caption { padding-top: 0; min-height: 32px; border: 0; gap: 10px; }
  .art-caption > span { font-size: 12px; }
  .course-art .field-pause { width: 32px; height: 32px; }
  .course-main, .course-footer { width: auto; margin-inline: var(--gutter); }
  .course-hero { min-height: 100svh; padding: calc(110px + min(33svh, 280px)) 0 80px; }
  .course-hero h1 { font-size: clamp(58px, 12vw, 88px); }
  .featured-course, .planned-course { min-height: 68svh; grid-template-columns: 25px 1fr; gap: 15px; padding-block: 55px; }
  .learning-principles, .course-section { min-height: 80svh; padding-top: 55px; }
  .planned-course > p { font-size: 17px; }
  .course-numbers { gap: 16px; }
  .format-intro h2, .program-heading h2, .start-course h2 { font-size: clamp(40px, 9vw, 65px); }
  #catalog, #format, #program, #start, .track { scroll-margin-top: calc(120px + min(33svh, 280px)); }
}