:root {
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --surface: #f5f5f7;
  --line: rgba(29, 29, 31, 0.1);
  --blue: #0071e3;
  --purple: #6e5cff;
  --pink: #d43fa4;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: hidden;
  background: var(--surface);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
:focus-visible { outline: 3px solid rgba(0,113,227,.5); outline-offset: 4px; }
.skip-link { position: fixed; left: 18px; top: -80px; z-index: 100; padding: 11px 16px; border-radius: 12px; background: #fff; box-shadow: 0 10px 34px rgba(0,0,0,.18); font-size: 13px; font-weight: 700; transition: top .2s ease; }
.skip-link:focus { top: 12px; }

.site-nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: 54px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 clamp(22px, 4vw, 68px);
  background: rgba(250, 250, 252, 0.78);
  border-bottom: 1px solid rgba(29,29,31,.08);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
}
.brand { font-size: 14px; font-weight: 650; letter-spacing: -.02em; }
.brand span { color: var(--muted); font-weight: 450; }
.nav-links { display: flex; gap: 30px; font-size: 12px; color: #424245; }
.nav-links a { position: relative; transition: color .2s ease; }
.nav-links a::after { content: ''; position: absolute; left: 0; right: 100%; bottom: -8px; height: 1px; background: currentColor; transition: right .22s ease; }
.nav-links a:hover { color: #000; }
.nav-links a:hover::after { right: 0; }
.nav-links a.is-active { color: var(--blue); }
.nav-featured { color: var(--blue); font-weight: 650; }
.nav-cta {
  justify-self: end;
  padding: 8px 13px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  transition: transform .2s ease, box-shadow .2s ease;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 7px 20px rgba(0,0,0,.16); }
.nav-cta i { display: inline-block; width: 7px; height: 7px; margin-right: 6px; border-radius: 50%; background: #5dd68b; box-shadow: 0 0 0 4px rgba(93,214,139,.16); }
.scroll-progress { position: absolute; left: 0; bottom: -1px; width: 0; height: 2px; background: linear-gradient(90deg,var(--blue),var(--purple),var(--pink)); }

.hero {
  position: relative;
  min-height: min(920px, 100vh);
  padding: 150px clamp(24px, 7vw, 110px) 92px;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, .8fr);
  align-items: center;
  background: #fbfbfd;
}
.hero-content { position: relative; z-index: 3; max-width: 820px; }
.eyebrow, .section-kicker {
  margin: 0 0 22px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 650;
  letter-spacing: .01em;
}
.hero h1 {
  margin: 0;
  max-width: 950px;
  font-size: clamp(54px, 7.2vw, 108px);
  line-height: .94;
  letter-spacing: -.064em;
  font-weight: 700;
}
.hero h1 span {
  background: linear-gradient(105deg, #0071e3 3%, #6e5cff 42%, #d43fa4 78%, #f15d39);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-copy {
  max-width: 680px;
  margin: 34px 0 0;
  color: var(--muted);
  font-size: clamp(20px, 2vw, 28px);
  line-height: 1.28;
  letter-spacing: -.025em;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
}
.button:hover { transform: translateY(-2px); }
.button span { transition: transform .2s ease; }
.button:hover span { transform: translateX(3px); }
.button-dark { background: var(--ink); color: white; box-shadow: 0 9px 28px rgba(0,0,0,.14); }
.button-light { background: white; border: 1px solid var(--line); }
.button-accent { color: white; background: linear-gradient(105deg,var(--blue),var(--purple) 58%,var(--pink)); box-shadow: 0 12px 30px rgba(75,80,220,.22); }
.text-link { display: inline-flex; align-items: center; gap: 10px; min-height: 48px; padding: 0 8px; color: var(--muted); font-size: 13px; font-weight: 620; }
.text-link span { color: var(--blue); transition: transform .2s ease; }
.text-link:hover span { transform: translateY(3px); }
.hero-meta { margin: 26px 0 0; color: #86868b; font-size: 13px; }
.aurora { position: absolute; border-radius: 50%; filter: blur(3px); opacity: .44; }
.aurora-one { width: 460px; height: 460px; right: -170px; top: 80px; background: radial-gradient(circle at 30% 30%, #83c8ff, transparent 65%); }
.aurora-two { width: 380px; height: 380px; right: 12%; bottom: -250px; background: radial-gradient(circle, #f4a1d6, transparent 65%); }
.hero-orb { position: relative; width: min(32vw, 470px); aspect-ratio: 1; justify-self: center; z-index: 2; }
.orb-core {
  position: absolute;
  inset: 17%;
  border-radius: 44% 56% 60% 40% / 52% 36% 64% 48%;
  background: radial-gradient(circle at 34% 30%, #fff 0 3%, #a9ddff 15%, #7088ff 34%, #8c52d9 54%, #e54f9d 72%, #ffb86a 100%);
  box-shadow: inset -24px -30px 55px rgba(34, 22, 96, .28), 0 35px 90px rgba(95, 92, 219, .25);
  animation: breathe 7s ease-in-out infinite alternate;
}
.orb-ring { position: absolute; inset: 8%; border: 1px solid rgba(101,96,190,.2); border-radius: 50%; }
.ring-one { transform: rotate(20deg) scaleY(.54); }
.ring-two { transform: rotate(-38deg) scaleY(.68); inset: 3%; }
@keyframes breathe { to { transform: rotate(8deg) scale(1.045); border-radius: 56% 44% 42% 58% / 48% 62% 38% 52%; } }
.ring-one { animation: ring-one 18s linear infinite; }
.ring-two { animation: ring-two 24s linear infinite reverse; }
@keyframes ring-one { to { transform: rotate(380deg) scaleY(.54); } }
@keyframes ring-two { to { transform: rotate(322deg) scaleY(.68); } }

.quick-links { position: relative; z-index: 6; display: grid; grid-template-columns: repeat(4,1fr); gap: 1px; margin: -38px clamp(24px,7vw,110px) 0; padding: 1px; border: 1px solid var(--line); border-radius: 24px; overflow: hidden; background: var(--line); box-shadow: 0 24px 70px rgba(29,29,31,.12); }
.quick-links a { position: relative; min-height: 126px; padding: 24px; background: rgba(255,255,255,.96); transition: background .2s ease, transform .2s ease; }
.quick-links a:hover { z-index: 2; background: #f5faff; transform: translateY(-2px); }
.quick-links span, .quick-links strong { display: block; }
.quick-links span { color: #86868b; font-size: 11px; }
.quick-links strong { margin-top: 25px; font-size: 17px; letter-spacing: -.025em; }
.quick-links i { position: absolute; right: 22px; top: 22px; color: var(--blue); font-size: 13px; font-style: normal; }
.quick-links .quick-signup { color: #fff; background: linear-gradient(135deg,#15151a,#272233); }
.quick-links .quick-signup span { color: #aeb7ff; }
.quick-links .quick-signup i { color: #9dccff; }

.section { padding: 120px clamp(24px, 7vw, 110px); }
.fact-section { background: #fff; }
.facts-grid { display: grid; grid-template-columns: 1.35fr 1fr .6fr .7fr; border-top: 1px solid var(--line); }
.fact { min-height: 138px; padding: 26px 22px 0 0; border-right: 1px solid var(--line); }
.fact:not(:first-child) { padding-left: 26px; }
.fact:last-child { border-right: 0; }
.fact p { margin: 0 0 34px; color: #86868b; font-size: 12px; }
.fact h2 { margin: 0; font-size: clamp(18px, 2vw, 27px); letter-spacing: -.035em; }
.course-description {
  display: grid;
  grid-template-columns: minmax(150px, .45fr) minmax(0, 1.55fr);
  gap: 50px;
  margin-top: 84px;
  padding-top: 38px;
  border-top: 1px solid var(--line);
}
.course-description p { margin: 0; }
.description-label { color: #86868b; font-size: 13px; }
.course-description p:last-child {
  max-width: 900px;
  font-size: clamp(24px, 3vw, 38px);
  line-height: 1.27;
  letter-spacing: -.035em;
}
.section-title { margin: 0; font-size: clamp(44px, 6vw, 82px); line-height: .99; letter-spacing: -.055em; }
.section-title span { color: #86868b; }
.section-title.compact { max-width: 760px; font-size: clamp(40px, 5vw, 68px); }
.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 82px;
  border-top: 1px solid var(--line);
}
.principle-grid article { padding: 26px 28px 0 0; border-right: 1px solid var(--line); }
.principle-grid article:not(:first-child) { padding-left: 28px; }
.principle-grid article:last-child { border-right: 0; }
.principle-grid span { color: #86868b; font-size: 12px; }
.principle-grid h3 { margin: 30px 0 12px; font-size: 25px; letter-spacing: -.035em; }
.principle-grid p { max-width: 320px; margin: 0; color: var(--muted); line-height: 1.5; }
.lens-section { background: #fff; }
.lens-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.lens-grid article { min-height: 520px; padding: clamp(32px, 4vw, 62px); border-radius: 34px; display: flex; flex-direction: column; }
.lens-grid article > p { margin: 0; font-size: 13px; font-weight: 650; }
.lens-grid h3 { margin: 64px 0 24px; max-width: 520px; font-size: clamp(42px, 4vw, 64px); line-height: .98; letter-spacing: -.05em; }
.lens-grid ul { display: grid; gap: 15px; margin: auto 0 0; padding: 0; list-style: none; }
.lens-grid li { padding: 14px 0; border-top: 1px solid rgba(29,29,31,.11); color: #57575c; line-height: 1.45; }
.art-lens { background: linear-gradient(150deg, #e8f4ff, #f7fbff); }
.art-lens > p { color: var(--blue); }
.tech-lens { color: #fff; background: linear-gradient(150deg, #211b35, #0b0b0d 72%); }
.tech-lens > p { color: #9dccff; }
.tech-lens li { color: #c7c7cc; border-color: rgba(255,255,255,.14); }
.outcomes-row { display: grid; grid-template-columns: 190px minmax(0,1fr); gap: 40px; margin-top: 62px; padding-top: 28px; border-top: 1px solid var(--line); }
.outcomes-row span { color: #86868b; font-size: 13px; }
.outcomes-row p { max-width: 940px; margin: 0; font-size: clamp(22px, 2.5vw, 34px); line-height: 1.32; letter-spacing: -.025em; }
.section-heading-row { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 58px; }
.weight-note { color: #86868b; font-size: 13px; white-space: nowrap; }
.assessment-grid { display: grid; grid-template-columns: 1fr 1.45fr 1fr; gap: 16px; }
.assessment-card { min-height: 310px; border-radius: 30px; padding: 30px; display: flex; flex-direction: column; overflow: hidden; }
.assessment-card p { margin: 0; color: rgba(29,29,31,.62); font-size: 13px; }
.assessment-card h3 { margin: 18px 0; max-width: 260px; font-size: 27px; line-height: 1.05; letter-spacing: -.04em; }
.assessment-card strong { margin-top: auto; font-size: 68px; letter-spacing: -.07em; }
.card-1 { background: #e8f4ff; }
.card-2 { background: #1d1d1f; color: white; }
.card-2 p { color: rgba(255,255,255,.62); }
.card-3 { background: linear-gradient(145deg,#f0eaff,#fbe5f1); }
.deadline-strip { display: grid; grid-template-columns: 1.25fr repeat(3,1fr); margin-top: 70px; border: 1px solid var(--line); border-radius: 24px; overflow: hidden; background: #fff; }
.deadline-strip > p, .deadline-strip article { min-height: 142px; margin: 0; padding: 24px; }
.deadline-strip > p { display: flex; justify-content: space-between; flex-direction: column; color: var(--ink); font-size: 14px; font-weight: 680; }
.deadline-strip > p span { max-width: 220px; color: #86868b; font-size: 11px; font-weight: 450; line-height: 1.4; }
.deadline-strip article { display: flex; flex-direction: column; border-left: 1px solid var(--line); background: #fbfbfd; }
.deadline-strip article span, .deadline-strip article small { color: #86868b; font-size: 11px; }
.deadline-strip article strong { margin: auto 0 6px; font-size: clamp(25px,3vw,38px); letter-spacing: -.05em; }

.presentation-section { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; padding-top: 0; background: #fff; }
.presentation-panel { min-height: 670px; padding: clamp(30px, 4.5vw, 70px); border-radius: 34px; display: flex; flex-direction: column; }
.weekly-panel { background: linear-gradient(155deg, #eaf5ff, #f8fbff 68%); }
.final-panel { background: linear-gradient(150deg, #211b35, #0b0b0d 70%); color: white; }
.panel-topline { display: flex; justify-content: space-between; align-items: center; font-size: 13px; }
.panel-topline span { color: #626267; }
.panel-topline strong { padding: 8px 12px; border-radius: 999px; background: rgba(255,255,255,.6); }
.final-panel .panel-topline span { color: #a1a1a6; }
.final-panel .panel-topline strong { background: rgba(255,255,255,.1); }
.presentation-panel h2 { margin: 76px 0 24px; font-size: clamp(46px, 5vw, 74px); line-height: .96; letter-spacing: -.055em; }
.panel-intro { max-width: 520px; margin: 0; color: #5f5f64; font-size: 19px; line-height: 1.45; }
.final-panel .panel-intro { color: #a1a1a6; }
.presentation-signup-link { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin: 30px 0 26px; padding: 18px 20px; border: 1px solid rgba(0,113,227,.2); border-radius: 18px; background: var(--blue); color: #fff; box-shadow: 0 14px 32px rgba(0,113,227,.18); transition: transform .2s ease, box-shadow .2s ease; }
.presentation-signup-link:hover { transform: translateY(-2px); box-shadow: 0 18px 38px rgba(0,113,227,.25); }
.presentation-signup-link span { font-size: 13px; opacity: .82; }
.presentation-signup-link strong { font-size: 15px; white-space: nowrap; }
.final-panel .presentation-signup-link { border-color: rgba(142,200,255,.24); background: #147ce5; box-shadow: 0 14px 32px rgba(0,113,227,.22); }
.presentation-panel ul { display: grid; gap: 14px; margin: auto 0 0; padding: 0; list-style: none; }
.presentation-panel li { position: relative; padding: 15px 0 15px 32px; border-top: 1px solid rgba(29,29,31,.1); color: #55555a; line-height: 1.45; }
.presentation-panel li::before { content: '✓'; position: absolute; left: 2px; color: var(--blue); font-weight: 700; }
.final-panel li { color: #c7c7cc; border-color: rgba(255,255,255,.12); }
.final-panel li::before { color: #9dccff; }

.schedule-section { background: #fbfbfd; }
.schedule-heading { display: flex; justify-content: space-between; align-items: end; gap: 30px; margin-bottom: 68px; }
.schedule-heading > p { max-width: 180px; margin: 0; color: #86868b; font-size: 13px; line-height: 1.5; }
.schedule-list { border-top: 1px solid var(--line); }
.schedule-list details { border-bottom: 1px solid var(--line); transition: background .25s ease; }
.schedule-list details:hover { background: rgba(255,255,255,.72); }
.schedule-list .current-week { margin: 0 -24px; padding: 0 24px; border: 1px solid rgba(0,113,227,.16); border-radius: 22px; background: linear-gradient(110deg,rgba(232,244,255,.8),rgba(255,255,255,.8)); box-shadow: 0 12px 36px rgba(0,113,227,.06); }
.current-week .week-date { color: var(--blue); font-weight: 700; }
.schedule-list summary {
  display: grid;
  grid-template-columns: 54px 76px minmax(0, 1fr) auto 30px;
  align-items: center;
  gap: 20px;
  min-height: 104px;
  cursor: pointer;
  list-style: none;
}
.schedule-list summary::-webkit-details-marker { display: none; }
.schedule-list summary:hover .week-title { color: var(--blue); }
.week-number, .week-date { color: #86868b; font-size: 12px; }
.week-title { font-size: clamp(18px, 2vw, 27px); font-weight: 620; letter-spacing: -.03em; transition: color .2s ease; }
.week-tag { padding: 7px 10px; border-radius: 999px; background: #ededf0; color: #66666b; font-size: 11px; white-space: nowrap; }
.week-toggle { color: #86868b; font-size: 21px; transition: transform .25s ease; }
.schedule-list details[open] .week-toggle { transform: rotate(45deg); }
.week-focus { display: grid; grid-template-columns: 150px minmax(0, 1fr); gap: 20px; padding: 0 50px 32px 150px; }
.week-focus span { color: var(--blue); font-size: 12px; }
.week-focus p { max-width: 820px; margin: 0; color: var(--muted); font-size: 17px; line-height: 1.55; }
.week-resources { grid-column: 2; display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 10px; margin-top: 14px; }
.current-week .week-resources { grid-template-columns: 1.25fr repeat(4,minmax(0,1fr)); }
.week-resources a { display: flex; min-height: 96px; padding: 18px; border: 1px solid rgba(0,113,227,.16); border-radius: 18px; background: #f2f7fd; flex-direction: column; justify-content: space-between; transition: transform .2s ease, border-color .2s ease, background .2s ease; }
.week-resources a:hover { transform: translateY(-2px); border-color: rgba(0,113,227,.42); background: #eaf4ff; }
.week-resources strong { color: var(--ink); font-size: 15px; letter-spacing: -.02em; }
.week-resources small { color: var(--blue); font-size: 11px; }
.week-resources .resource-primary { color: #fff; border-color: transparent; background: linear-gradient(135deg,#0d69bd,#6958dd); box-shadow: 0 12px 26px rgba(60,74,194,.2); }
.week-resources .resource-primary strong, .week-resources .resource-primary small { color: #fff; }

.frontier-section { background: #fff; }
.frontier-section > .section-title { max-width: 920px; }
.frontier-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 70px; }
.frontier-grid article { min-height: 310px; padding: 28px; border-radius: 28px; background: #f5f5f7; }
.frontier-grid span { color: var(--blue); font-size: 12px; font-weight: 650; }
.frontier-grid h3 { margin: 58px 0 14px; font-size: 27px; letter-spacing: -.04em; }
.frontier-grid p { margin: 0; color: var(--muted); line-height: 1.5; }
.references-drawer { margin-top: 58px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.references-drawer > summary { display: flex; align-items: center; justify-content: space-between; min-height: 76px; cursor: pointer; list-style: none; font-size: 14px; font-weight: 680; }
.references-drawer > summary::-webkit-details-marker { display: none; }
.references-drawer > summary span { color: var(--blue); font-size: 12px; font-weight: 550; }
.references-drawer[open] > summary span { font-size: 0; }
.references-drawer[open] > summary span::after { content: 'Close −'; font-size: 12px; }
.source-links { display: grid; grid-template-columns: 180px repeat(4, minmax(0,1fr)); gap: 0; margin: 0 0 28px; border-top: 1px solid var(--line); animation: drawer-in .25s ease both; }
.source-links p, .source-links a { margin: 0; padding: 18px 16px 18px 0; border-bottom: 1px solid var(--line); font-size: 12px; line-height: 1.4; }
.source-links p { color: #86868b; }
.source-links a { color: var(--blue); }
@keyframes drawer-in { from { opacity: 0; transform: translateY(-8px); } }

.signup-section { display: grid; grid-template-columns: .9fr 1.1fr; gap: 80px; color: white; background: #0c0c0e; }
.section-kicker.light { color: #8ec8ff; }
.signup-copy h2 { margin: 0; font-size: clamp(44px, 5.5vw, 76px); line-height: .98; letter-spacing: -.055em; }
.signup-copy > p:not(.section-kicker) { max-width: 520px; margin: 28px 0; color: #a1a1a6; font-size: 18px; line-height: 1.5; }
.button-white { background: white; color: var(--ink); }
.signup-cards { display: grid; gap: 14px; align-content: center; }
.signup-cards article { padding: 28px; border: 1px solid rgba(255,255,255,.12); border-radius: 26px; background: rgba(255,255,255,.055); }
.signup-cards span { color: #8ec8ff; font-size: 12px; font-weight: 650; }
.signup-cards h3 { margin: 12px 0 14px; font-size: 30px; letter-spacing: -.035em; }
.signup-cards p { margin: 0; color: #a1a1a6; line-height: 1.5; }
.signup-cards .access-note { padding: 10px 6px 0; font-size: 12px; }
.signup-section .button-white { box-shadow: 0 0 0 0 rgba(142,200,255,.22); animation: signup-glow 3.4s ease-in-out infinite; }
@keyframes signup-glow { 50% { box-shadow: 0 0 0 12px rgba(142,200,255,0); } }

.team-section { display: grid; grid-template-columns: .75fr 1.25fr; gap: 80px; background: #fff; }
.team-grid { display: grid; grid-template-columns: 1fr 1fr; align-content: end; border-top: 1px solid var(--line); }
.team-grid article { min-height: 280px; padding: 28px 30px 0 0; display: flex; flex-direction: column; border-right: 1px solid var(--line); }
.team-grid article:last-child { padding-left: 30px; border-right: 0; }
.team-grid p { margin: 0; color: #86868b; font-size: 12px; }
.team-grid h3 { margin: 46px 0 8px; font-size: 32px; letter-spacing: -.04em; }
.team-grid span { color: #86868b; font-size: 14px; }
.team-grid a { margin-top: 12px; color: var(--blue); font-size: 14px; }
.team-grid a:first-of-type { margin-top: auto; }
.team-grid a:last-of-type { padding-bottom: 28px; }

footer { padding: 62px clamp(24px, 7vw, 110px) 74px; background: #f5f5f7; border-top: 1px solid var(--line); }
.footer-title { font-size: clamp(56px, 9vw, 128px); font-weight: 700; letter-spacing: -.075em; }
footer > p { margin: 10px 0 64px; color: #86868b; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 22px; padding-top: 22px; border-top: 1px solid var(--line); font-size: 13px; }

.hero-content > * { animation: hero-in .72s cubic-bezier(.22,1,.36,1) both; }
.hero-content > :nth-child(2) { animation-delay: .06s; }
.hero-content > :nth-child(3) { animation-delay: .12s; }
.hero-content > :nth-child(4) { animation-delay: .18s; }
.hero-content > :nth-child(5) { animation-delay: .24s; }
@keyframes hero-in { from { opacity: 0; transform: translateY(22px); } }
.motion-ready .reveal-item { transition: opacity .72s cubic-bezier(.22,1,.36,1), transform .72s cubic-bezier(.22,1,.36,1); }
.motion-ready .reveal-item:not(.is-visible) { opacity: 0; transform: translateY(28px); }
.motion-ready .reveal-item.is-visible { opacity: 1; transform: none; }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding-top: 130px; }
  .hero-orb { position: absolute; width: 340px; right: -120px; bottom: 40px; opacity: .68; }
  .facts-grid { grid-template-columns: 1fr 1fr; }
  .fact:nth-child(2) { border-right: 0; }
  .assessment-grid { grid-template-columns: 1fr; }
  .assessment-card { min-height: 230px; }
  .presentation-section { grid-template-columns: 1fr; }
  .presentation-panel { min-height: 600px; }
  .lens-grid { grid-template-columns: 1fr; }
  .quick-links { grid-template-columns: 1fr 1fr; }
  .deadline-strip { grid-template-columns: 1fr 1fr; }
  .deadline-strip > p { grid-column: 1 / -1; min-height: 110px; }
  .deadline-strip article:nth-of-type(3) { border-top: 1px solid var(--line); }
  .current-week .week-resources { grid-template-columns: 1fr 1fr; }
  .frontier-grid { grid-template-columns: 1fr 1fr; }
  .source-links { grid-template-columns: 160px 1fr 1fr; }
  .team-section { grid-template-columns: 1fr; }
  .signup-section { grid-template-columns: 1fr; gap: 58px; }
}

@media (max-width: 620px) {
  .site-nav { grid-template-columns: 1fr auto; }
  .nav-links { display: none; }
  .hero { min-height: 860px; }
  .hero h1 { font-size: clamp(50px, 15vw, 74px); }
  .hero-orb { width: 260px; right: -92px; bottom: 76px; }
  .section { padding: 84px 22px; }
  .quick-links { grid-template-columns: 1fr; margin: -26px 16px 0; border-radius: 20px; }
  .quick-links a { min-height: 104px; padding: 20px; }
  .quick-links strong { margin-top: 20px; }
  .facts-grid { grid-template-columns: 1fr; }
  .fact, .fact:not(:first-child) { border-right: 0; border-bottom: 1px solid var(--line); padding: 24px 0; min-height: auto; }
  .fact p { margin-bottom: 16px; }
  .course-description { grid-template-columns: 1fr; gap: 20px; margin-top: 58px; }
  .principle-grid { grid-template-columns: 1fr; margin-top: 60px; }
  .principle-grid article, .principle-grid article:not(:first-child) { padding: 24px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .lens-grid article { min-height: 500px; border-radius: 26px; }
  .outcomes-row { grid-template-columns: 1fr; gap: 14px; }
  .section-heading-row { align-items: start; flex-direction: column; }
  .weight-note { white-space: normal; }
  .assessment-card strong { font-size: 56px; }
  .deadline-strip { grid-template-columns: 1fr; margin-top: 52px; }
  .deadline-strip > p { grid-column: auto; }
  .deadline-strip article { min-height: 110px; border-left: 0; border-top: 1px solid var(--line); }
  .presentation-panel { min-height: 630px; border-radius: 26px; }
  .schedule-heading { align-items: start; flex-direction: column; }
  .schedule-list summary { grid-template-columns: 36px minmax(0, 1fr) 24px; gap: 12px; padding: 18px 0; }
  .week-date { grid-column: 2; grid-row: 2; }
  .week-title { grid-column: 2; grid-row: 1; }
  .week-tag { display: none; }
  .week-toggle { grid-column: 3; grid-row: 1 / span 2; }
  .week-focus { grid-template-columns: 1fr; gap: 8px; padding: 0 0 28px 48px; }
  .week-resources, .current-week .week-resources { grid-column: 1; grid-template-columns: 1fr 1fr; margin-top: 14px; }
  .schedule-list .current-week { margin: 0 -12px; padding: 0 12px; }
  .frontier-grid { grid-template-columns: 1fr; }
  .source-links { grid-template-columns: 1fr; }
  .source-links p { font-weight: 650; color: var(--ink); }
  .team-grid { grid-template-columns: 1fr; }
  .team-grid article, .team-grid article:last-child { min-height: 240px; padding: 24px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .footer-links { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
  .motion-ready .reveal-item:not(.is-visible) { opacity: 1; transform: none; }
}