:root {
  color-scheme: light dark;
  --bg: light-dark(#fff1d0, #17151f);
  --ink: light-dark(#111, #fff1d0);
  --card: light-dark(#fffaf0, #24212e);
  --yellow: #ffd23f;
  --pink: #ff6b9d;
  --blue: #5cb4ff;
  --mint: #7be0a8;
  --on: #111;
  --b: 3px solid var(--ink);
  --sh: 6px 6px 0 var(--ink);
  box-sizing: border-box;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: env(safe-area-inset-top, 0px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Space Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.5;
  background-image: radial-gradient(color-mix(in srgb, var(--ink) 18%, transparent) 1.2px, transparent 1.2px);
  background-size: 18px 18px;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  cursor: pointer;
}

.mono {
  font-family: "Space Mono", ui-monospace, Menlo, monospace;
}

.wrap {
  width: min(1160px, calc(100% - 36px));
  margin: auto;
}

.ticker {
  background: var(--ink);
  color: var(--bg);
  font: 700 12px "Space Mono", monospace;
  text-transform: uppercase;
  letter-spacing: .1em;
  padding: 9px 0;
  overflow: hidden;
  white-space: nowrap;
}

.ticker span {
  display: inline-block;
  padding-left: 100%;
  animation: tick 28s linear infinite;
}

@keyframes tick {
  to {
    transform: translateX(-100%);
  }
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 18px;
  line-height: 1.1;
}

.brand small {
  display: block;
  font: 400 10px "Space Mono", monospace;
  text-transform: uppercase;
  letter-spacing: .08em;
}

.mark {
  width: 46px;
  height: 46px;
  background: var(--yellow);
  color: var(--on);
  border: var(--b);
  box-shadow: 4px 4px 0 var(--ink);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 26px;
  transform: rotate(-6deg);
}

.nav {
  display: flex;
  gap: 10px;
  align-items: center;
  font: 700 13px "Space Mono", monospace;
  text-transform: uppercase;
}

.nav a {
  padding: 9px 12px;
  border: 3px solid transparent;
}

.nav a:hover {
  border-color: var(--ink);
  background: var(--card);
}

.nav .nav-cta {
  background: var(--pink);
  color: var(--on);
  border: var(--b);
  box-shadow: 4px 4px 0 var(--ink);
  transition: transform .12s, box-shadow .12s;
}

.nav .nav-cta:hover {
  background: var(--pink);
  transform: translate(3px, 3px);
  box-shadow: 1px 1px 0 var(--ink);
}

.nav .nav-cta:active {
  transform: translate(4px, 4px);
  box-shadow: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  border: var(--b);
  box-shadow: var(--sh);
  font: 700 14px "Space Mono", monospace;
  text-transform: uppercase;
  transition: transform .12s, box-shadow .12s;
  color: var(--on);
}

.btn:hover {
  transform: translate(3px, 3px);
  box-shadow: 3px 3px 0 var(--ink);
}

.btn:active {
  transform: translate(6px, 6px);
  box-shadow: 0 0 0 var(--ink);
}

.b-yellow {
  background: var(--yellow);
}

.b-pink {
  background: var(--pink);
}

.b-blue {
  background: var(--blue);
}

.b-card {
  background: var(--card);
  color: var(--ink);
}

.hero {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 44px;
  align-items: center;
  padding: 44px 0 70px;
}

.tag {
  display: inline-block;
  background: var(--blue);
  color: var(--on);
  border: var(--b);
  padding: 6px 12px;
  font: 700 12px "Space Mono", monospace;
  text-transform: uppercase;
  transform: rotate(-2deg);
  margin-bottom: 22px;
}

h1 {
  font-size: clamp(48px, 8vw, 104px);
  line-height: .92;
  letter-spacing: -.05em;
  margin: 0;
  text-transform: uppercase;
}

h1 .hl {
  background: var(--yellow);
  color: var(--on);
  padding: 0 .12em;
  border: var(--b);
  display: inline-block;
  transform: rotate(-1.5deg);
  box-shadow: var(--sh);
  margin-top: 8px;
}

.hero-copy {
  font-size: 19px;
  max-width: 520px;
  margin: 28px 0;
}

.actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.micro {
  font: 400 12px "Space Mono", monospace;
  margin-top: 22px;
}

.window {
  background: var(--card);
  border: var(--b);
  box-shadow: 10px 10px 0 var(--ink);
  transform: rotate(1.5deg);
}

.win-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  background: var(--pink);
  color: var(--on);
  border-bottom: var(--b);
  padding: 9px 12px;
  font: 700 12px "Space Mono", monospace;
  text-transform: uppercase;
}

.win-bar i {
  width: 13px;
  height: 13px;
  border: 2px solid #111;
  background: var(--yellow);
  display: inline-block;
}

.win-bar span {
  margin-left: auto;
}

.win-body {
  padding: 22px;
}

.win-body h3 {
  margin: 0 0 6px;
  font-size: 22px;
  text-transform: uppercase;
}

.win-body p {
  margin: 0 0 18px;
  font: 400 12px "Space Mono", monospace;
}

.levels {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.level {
  border: var(--b);
  padding: 14px;
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--on);
}

.level small {
  display: block;
  font: 700 11px "Space Mono", monospace;
  text-transform: uppercase;
  margin-top: 6px;
}

.l1 {
  background: var(--mint);
  box-shadow: 4px 4px 0 var(--ink);
}

.l2 {
  background: var(--blue);
}

.l3 {
  background: var(--yellow);
}

.l4 {
  background: var(--pink);
}

.proof {
  background: var(--yellow);
  color: var(--on);
  border-block: var(--b);
  padding: 16px 0;
}

.proof-inner {
  display: flex;
  justify-content: space-between;
  gap: 14px 28px;
  flex-wrap: wrap;
  font: 700 13px "Space Mono", monospace;
  text-transform: uppercase;
}

section.content {
  padding: 84px 0;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 28px;
  margin-bottom: 38px;
  flex-wrap: wrap;
}

.kicker {
  display: inline-block;
  background: var(--ink);
  color: var(--bg);
  padding: 5px 10px;
  font: 700 12px "Space Mono", monospace;
  text-transform: uppercase;
  margin-bottom: 14px;
}

h2 {
  font-size: clamp(34px, 5vw, 62px);
  line-height: .98;
  letter-spacing: -.04em;
  margin: 0;
  text-transform: uppercase;
}

.section-head p {
  max-width: 380px;
  margin: 0;
  font-size: 16px;
}

.programs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.program {
  border: var(--b);
  box-shadow: var(--sh);
  padding: 24px;
  display: flex;
  flex-direction: column;
  min-height: 310px;
  color: var(--on);
  transition: transform .15s;
}

.program:hover {
  transform: translate(-3px, -3px);
}

.p1 {
  background: var(--mint);
}

.p2 {
  background: var(--blue);
}

.p3 {
  background: var(--pink);
}

.program .num {
  font: 700 12px "Space Mono", monospace;
  text-transform: uppercase;
  border-bottom: var(--b);
  border-color: #111;
  padding-bottom: 10px;
  margin-bottom: 22px;
  display: flex;
  justify-content: space-between;
}

.program .ic {
  font-size: 40px;
  line-height: 1;
  margin-bottom: 12px;
}

.program h3 {
  font-size: 28px;
  line-height: 1;
  margin: 0 0 12px;
  text-transform: uppercase;
  letter-spacing: -.03em;
}

.program p {
  margin: 0 0 22px;
  font-size: 15px;
}

.program a {
  margin-top: auto;
  align-self: flex-start;
  background: #111;
  color: #fff1d0;
  padding: 9px 13px;
  font: 700 12px "Space Mono", monospace;
  text-transform: uppercase;
}

.method {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 44px;
  align-items: start;
}

.method-copy {
  background: var(--blue);
  color: var(--on);
  border: var(--b);
  box-shadow: var(--sh);
  padding: 34px;
}

.method-copy .kicker {
  background: #111;
  color: #fff1d0;
}

.method-copy p {
  font-size: 17px;
  margin: 22px 0 0;
}

.steps {
  display: grid;
  gap: 18px;
}

.step {
  display: grid;
  grid-template-columns: 70px 1fr;
  background: var(--card);
  border: var(--b);
  box-shadow: 5px 5px 0 var(--ink);
}

.step-no {
  background: var(--yellow);
  color: var(--on);
  border-right: var(--b);
  display: grid;
  place-items: center;
  font: 700 22px "Space Mono", monospace;
}

.step div:last-child {
  padding: 16px 18px;
}

.step h3 {
  margin: 0 0 4px;
  font-size: 18px;
  text-transform: uppercase;
}

.step p {
  margin: 0;
  font-size: 14px;
}

.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.principle {
  background: var(--card);
  border: var(--b);
  box-shadow: var(--sh);
  padding: 24px;
}

.principle .big {
  display: inline-block;
  background: var(--pink);
  color: var(--on);
  border: var(--b);
  padding: 2px 12px;
  font: 700 28px "Space Mono", monospace;
  transform: rotate(-3deg);
}

.principle h3 {
  font-size: 22px;
  margin: 18px 0 8px;
  text-transform: uppercase;
}

.principle p {
  margin: 0;
  font-size: 15px;
}

.cta {
  padding: 0 0 90px;
}

.cta-box {
  background: var(--pink);
  color: var(--on);
  border: var(--b);
  box-shadow: 12px 12px 0 var(--ink);
  padding: clamp(28px, 5vw, 60px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}

.cta-box .kicker {
  background: #111;
  color: #fff1d0;
}

.cta-box h2 {
  max-width: 640px;
}

.cta-box p {
  font: 400 13px "Space Mono", monospace;
  margin: 18px 0 0;
}

.cta-box .btn {
  background: var(--yellow);
}

footer {
  border-top: var(--b);
  background: var(--card);
  padding: 26px 0 36px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.footer-note,
.footer-links {
  font: 400 12px "Space Mono", monospace;
}

.footer-links {
  display: flex;
  gap: 18px;
  text-transform: uppercase;
}

.footer-links a {
  text-decoration: underline;
  text-decoration-thickness: 2px;
}

/* Homework pages */
.page-head{padding:44px 0 6px}
.page-head h1{font-size:clamp(40px,7vw,84px);outline:none}
.page-head h1 .hl{margin-top:6px}
.page-head p{max-width:620px;font-size:18px;margin:22px 0 0}
.crumbs{display:flex;flex-wrap:wrap;gap:8px 10px;align-items:center;font:700 12px "Space Mono",monospace;text-transform:uppercase;margin-bottom:24px}
.crumbs a{border-bottom:2px solid var(--ink);padding:2px 0}
.crumbs a:hover{background:var(--yellow);color:var(--on)}
.crumbs [aria-current]{background:var(--ink);color:var(--bg);padding:2px 8px}
.hw-view{padding:34px 0 90px}
.hw-levels{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}
.hw-card{display:flex;flex-direction:column;gap:6px;min-height:160px;padding:18px;border:var(--b);box-shadow:var(--sh);background:var(--c,var(--yellow));color:var(--on);transition:transform .12s,box-shadow .12s}
.hw-card:hover{transform:translate(3px,3px);box-shadow:3px 3px 0 var(--ink)}
.hw-card:active{transform:translate(6px,6px);box-shadow:none}
.hw-card:focus-visible,.crumbs a:focus-visible,.btn:focus-visible{outline:3px solid var(--blue);outline-offset:3px}
.hw-card .num{font:700 48px/1 "Space Mono",monospace}
.hw-card .name{font:700 15px "Space Mono",monospace;text-transform:uppercase}
.hw-card small{margin-top:auto;font:400 11px "Space Mono",monospace}
.hw-levels .hw-card:nth-child(4n+1){--c:var(--mint)}
.hw-levels .hw-card:nth-child(4n+2){--c:var(--blue)}
.hw-levels .hw-card:nth-child(4n+3){--c:var(--yellow)}
.hw-levels .hw-card:nth-child(4n+4){--c:var(--pink)}
.hw-list{display:grid;gap:20px;max-width:780px}
.hw-card.row{flex-direction:row;align-items:center;gap:18px;min-height:0;background:var(--card);color:var(--ink)}
.hw-card.row .num{display:grid;place-items:center;flex-shrink:0;width:60px;height:60px;background:var(--yellow);color:var(--on);border:var(--b);font-size:28px}
.hw-card.row .grow{flex:1;min-width:0}
.hw-card.row .name{display:block;font-size:17px}
.hw-card.row small{display:block;margin-top:4px}
.hw-arrow{font:700 22px "Space Mono",monospace;flex-shrink:0}
.pill{display:inline-block;padding:3px 8px;border:2px solid var(--ink);background:var(--bg);color:var(--ink);font:700 10px "Space Mono",monospace;text-transform:uppercase;white-space:nowrap}
.pill.ready{background:var(--mint);color:var(--on)}
.hw-panel{max-width:820px;background:var(--card);border:var(--b);box-shadow:10px 10px 0 var(--ink)}
.hw-panel-bar{display:flex;align-items:center;gap:7px;background:var(--pink);color:var(--on);border-bottom:var(--b);padding:9px 12px;font:700 12px "Space Mono",monospace;text-transform:uppercase}
.hw-panel-bar i{width:13px;height:13px;border:2px solid #111;background:var(--yellow);display:inline-block}
.hw-panel-bar span{margin-left:auto}
.hw-panel-body{padding:clamp(20px,4vw,34px)}
.hw-panel-body h2{font-size:clamp(26px,4vw,40px);margin-bottom:14px}
.hw-panel-body p{margin:0 0 22px;font-size:16px}
.hw-empty{padding:16px;border:2px dashed var(--ink);font:400 12px "Space Mono",monospace}
.hw-pager{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;max-width:820px;margin-top:30px}
@media (max-width:860px){.hw-levels{grid-template-columns:repeat(3,minmax(0,1fr))}.page-head{padding-top:30px}}
@media (max-width:520px){.hw-levels{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.hw-card{min-height:130px;padding:14px;box-shadow:5px 5px 0 var(--ink)}.hw-card .num{font-size:38px}.hw-card.row{gap:12px}.hw-card.row .num{width:48px;height:48px;font-size:22px}.hw-panel{box-shadow:7px 7px 0 var(--ink)}.hw-pager .btn{width:100%}.page-head p{font-size:16px}}

:root[data-theme="light"] {
  color-scheme: light;
}

:root[data-theme="dark"] {
  color-scheme: dark;
}

.theme-toggle {
  position: fixed;
  left: 14px;
  bottom: calc(14px + env(safe-area-inset-bottom, 0px));
  z-index: 6;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--pink);
  color: var(--on);
  border: var(--b);
  box-shadow: 4px 4px 0 var(--ink);
  padding: 9px 12px;
  min-height: 44px;
  font: 700 12px "Space Mono", monospace;
  text-transform: uppercase;
  cursor: pointer;
}

.theme-toggle:active {
  transform: translate(4px, 4px);
  box-shadow: none;
}

.prototype-note {
  position: fixed;
  right: 14px;
  bottom: calc(14px + env(safe-area-inset-bottom, 0px));
  background: var(--yellow);
  color: var(--on);
  border: var(--b);
  box-shadow: 4px 4px 0 var(--ink);
  padding: 7px 10px;
  font: 700 11px "Space Mono", monospace;
  text-transform: uppercase;
  z-index: 5;
}

html,
body {
  overflow-x: clip;
}

@media (max-width: 860px) {
  .hero,
  .method {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .programs,
  .principles {
    grid-template-columns: 1fr;
  }

  .topbar {
    flex-wrap: wrap;
    padding: 16px 0 14px;
  }

  .nav {
    width: 100%;
    overflow-x: auto;
    padding: 2px 2px 8px;
    scrollbar-width: none;
  }

  .nav::-webkit-scrollbar {
    display: none;
  }

  .nav a {
    white-space: nowrap;
    border-color: var(--ink);
    background: var(--card);
  }

  .nav .nav-cta {
    margin-left: auto;
  }

  .window {
    transform: none;
    box-shadow: 7px 7px 0 var(--ink);
  }

  .program {
    min-height: 0;
  }

  .section-head p {
    max-width: none;
  }

  section.content {
    padding: 60px 0;
  }

  .hero {
    padding: 30px 0 54px;
  }
}

@media (max-width: 520px) {
  .wrap {
    width: calc(100% - 28px);
  }

  .ticker {
    font-size: 11px;
  }

  .brand {
    font-size: 15px;
  }

  .mark {
    width: 40px;
    height: 40px;
  }

  .nav {
    font-size: 12px;
  }

  .nav a {
    padding: 10px 12px;
  }

  h1 {
    font-size: clamp(40px, 13.5vw, 70px);
  }

  .hero-copy {
    font-size: 17px;
    margin: 22px 0;
  }

  .actions {
    gap: 14px;
  }

  .btn {
    width: 100%;
    justify-content: space-between;
    min-height: 50px;
    box-shadow: 5px 5px 0 var(--ink);
  }

  .win-body {
    padding: 16px;
  }

  .level {
    font-size: 26px;
    padding: 12px;
  }

  .proof-inner {
    flex-direction: column;
    gap: 8px;
    font-size: 12px;
  }

  .method-copy {
    padding: 24px;
  }

  .step {
    grid-template-columns: 54px 1fr;
  }

  .step div:last-child {
    padding: 14px;
  }

  .principle {
    padding: 20px;
  }

  .cta {
    padding-bottom: 50px;
  }

  .cta-box {
    box-shadow: 7px 7px 0 var(--ink);
    gap: 24px;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-links a {
    padding: 6px 0;
  }

  footer {
    padding-bottom: 76px;
  }

  .prototype-note {
    font-size: 10px;
    padding: 6px 8px;
  }




}

@media (prefers-reduced-motion: reduce) {
  .ticker span {
    animation: none;
    padding-left: 0;
  }

  * {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}