:root {
  --paper: oklch(0.985 0.006 80);
  --paper-2: oklch(0.965 0.008 80);
  --paper-3: oklch(0.945 0.01 80);
  --ink: #1a1a1a;
  --ink-2: #3b3b3b;
  --ink-3: #6a6a6a;
  --ink-4: #a8a8a3;
  --ink-5: #cfcfc7;
  --rule: #d8d6cf;
  --rule-2: #ebeae4;
  --accent: oklch(0.62 0.13 50);
  --accent-2: oklch(0.56 0.14 45);
  --accent-soft: oklch(0.93 0.05 60);
  --accent-softer: oklch(0.96 0.03 65);
  --accent-ink: oklch(0.42 0.1 50);
  --leaf: oklch(0.55 0.08 145);
  --leaf-soft: oklch(0.92 0.04 145);
  --logo-blue: #0c73ff;
  --logo-green: #16b857;
  --logo-navy: #06254a;
  --sun: #f7b82f;
  --serif: "Fraunces", serif;
  --ui: "Inter", sans-serif;
  --mono: "JetBrains Mono", monospace;
  --hand: "Caveat", cursive;
  --shadow-lift: 0 8px 24px rgb(0 0 0 / 0.06);
  --shadow-panel: 0 30px 80px rgb(0 0 0 / 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--paper);
  background-image:
    radial-gradient(circle at 25% 30%, rgb(0 0 0 / 0.012) 0, transparent 40%),
    radial-gradient(circle at 75% 70%, rgb(0 0 0 / 0.012) 0, transparent 40%);
  color: var(--ink);
  font-family: var(--ui);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.nav-open {
  overflow: hidden;
}

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

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

img {
  display: block;
  max-width: 100%;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--rule-2);
  background: color-mix(in oklab, var(--paper) 94%, transparent);
  padding: 18px clamp(18px, 4vw, 40px);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 500;
  line-height: 1;
}

.brand-mark {
  width: 42px;
  height: 24px;
  flex: 0 0 auto;
}

.mark-left,
.mark-right {
  fill: none;
  stroke-width: 12;
  stroke-linecap: square;
  stroke-linejoin: miter;
}

.mark-left {
  stroke: var(--logo-blue);
}

.mark-right {
  stroke: var(--logo-green);
}

.mark-letter {
  fill: var(--logo-navy);
  font-family: var(--ui);
  font-size: 58px;
  font-weight: 900;
  letter-spacing: 0;
}

.brand-name {
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  color: var(--ink-3);
  font-size: 13.5px;
  font-weight: 400;
}

.site-nav a {
  transition: color 140ms ease;
}

.site-nav a:hover {
  color: var(--ink);
}

.nav-cta {
  border: 1px solid var(--rule);
  border-radius: 2px;
  background: var(--paper);
  color: var(--ink);
  padding: 9px 13px;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  gap: 5px;
  flex-direction: column;
  border: 1px solid var(--rule);
  border-radius: 2px;
  background: var(--paper);
}

.nav-toggle span {
  width: 18px;
  height: 1.5px;
  background: var(--ink);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(70px, 7vw, 104px) clamp(18px, 4vw, 40px) clamp(72px, 7vw, 104px);
  text-align: center;
}

.hero::before,
.hero::after {
  position: absolute;
  z-index: 0;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: var(--accent-softer);
  content: "";
  filter: blur(70px);
  opacity: 0.72;
}

.hero::before {
  top: -140px;
  right: -110px;
}

.hero::after {
  bottom: 220px;
  left: -150px;
  background: var(--leaf-soft);
  opacity: 0.42;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 1180px;
  margin: 0 auto;
}

.hero-logo {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin: 0 auto 24px;
  padding: 0;
  color: var(--ink);
}

.hero-logo-mark {
  width: 46px;
  height: auto;
  flex: 0 0 auto;
}

.hero-logo-copy {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  line-height: 1;
  text-align: center;
}

.hero-logo-copy strong {
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0;
}

.hero-logo-copy span {
  display: flex;
  gap: 7px;
  color: var(--accent-ink);
  font-size: 8px;
  font-weight: 800;
  letter-spacing: 0.2em;
  line-height: 1;
  text-transform: uppercase;
}

.hero-logo-copy b {
  font-weight: inherit;
}

.hero-logo-copy b:last-child {
  color: var(--logo-green);
}

.sun-mark {
  position: absolute;
  right: -14px;
  top: -4px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--sun);
  box-shadow:
    0 -8px 0 -3.8px var(--sun),
    0 8px 0 -3.8px var(--sun),
    8px 0 0 -3.8px var(--sun),
    -8px 0 0 -3.8px var(--sun),
    6px 6px 0 -3.8px var(--sun),
    -6px 6px 0 -3.8px var(--sun),
    6px -6px 0 -3.8px var(--sun),
    -6px -6px 0 -3.8px var(--sun);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--ink-3);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: 0;
  line-height: 0.98;
}

h1 {
  max-width: 950px;
  margin: 0 auto;
  font-size: clamp(50px, 5.8vw, 76px);
}

h2 {
  max-width: 760px;
  font-size: clamp(38px, 5.1vw, 62px);
}

h3 {
  margin: 0;
  color: var(--ink);
  font-size: 17px;
  line-height: 1.2;
}

p {
  overflow-wrap: anywhere;
}

.hero-lede {
  max-width: 680px;
  margin: 20px auto 0;
  color: var(--ink-3);
  font-size: 17px;
  line-height: 1.55;
}

.hero-actions,
.hero-facts {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.hero-actions {
  margin-top: 26px;
}

.btn {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--ink);
  border-radius: 2px;
  padding: 12px 20px;
  font-size: 13.5px;
  font-weight: 600;
  transition:
    transform 140ms ease,
    background 140ms ease,
    border-color 140ms ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  border-color: var(--accent);
  background: var(--accent);
  color: white;
}

.btn-primary:hover {
  border-color: var(--accent-2);
  background: var(--accent-2);
}

.btn-soft {
  border-color: var(--rule);
  background: var(--paper-2);
  color: var(--ink);
}

.hero-facts {
  margin-top: 14px;
}

.hero-facts span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--rule);
  border-radius: 100px;
  background: var(--paper);
  color: var(--ink-2);
  font-size: 12px;
  font-weight: 500;
  padding: 6px 11px;
}

.hero-stage {
  max-width: 1160px;
  margin: 38px auto 0;
}

.browser-shell {
  overflow: hidden;
  border: 1px solid var(--ink);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: var(--shadow-panel);
  text-align: left;
}

.browser-bar {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  min-height: 54px;
  border-bottom: 1px solid var(--rule-2);
  background: var(--paper-2);
  padding: 0 18px;
}

.browser-dots {
  display: flex;
  gap: 6px;
}

.browser-dots span {
  width: 10px;
  height: 10px;
  border: 1px solid var(--rule);
  border-radius: 50%;
  background: var(--paper);
}

.browser-url,
.browser-badge {
  overflow: hidden;
  color: var(--ink-3);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-overflow: ellipsis;
  text-transform: uppercase;
  white-space: nowrap;
}

.browser-badge {
  border: 1px solid var(--rule);
  border-radius: 100px;
  background: var(--paper);
  color: var(--accent-ink);
  padding: 6px 10px;
}

.preview-grid {
  display: grid;
  grid-template-columns: minmax(380px, 0.92fr) minmax(520px, 1.08fr);
  min-height: 470px;
}

.preview-copy {
  display: grid;
  align-content: center;
  border-right: 1px solid var(--rule-2);
  padding: clamp(34px, 4.5vw, 62px);
}

.preview-copy .eyebrow {
  color: var(--accent-ink);
}

.preview-copy h2 {
  max-width: 560px;
  font-size: clamp(38px, 4.2vw, 58px);
}

.preview-copy p:not(.eyebrow) {
  max-width: 540px;
  margin: 20px 0 0;
  color: var(--ink-3);
  line-height: 1.58;
}

.progress-list {
  display: grid;
  gap: 13px;
  margin-top: 30px;
}

.progress-list div {
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--rule-2);
  border-radius: 4px;
  background: var(--paper-2);
  color: var(--ink-2);
  font-size: 14px;
  padding: 13px 14px;
}

.progress-list span {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--leaf);
}

.desk-visual {
  position: relative;
  min-height: 470px;
  margin: 0;
  background: var(--accent-softer);
}

.desk-visual::after {
  position: absolute;
  right: 14px;
  bottom: 14px;
  border: 1px solid color-mix(in oklab, var(--accent) 32%, var(--rule));
  border-radius: 4px;
  background: color-mix(in oklab, var(--paper) 86%, transparent);
  color: var(--accent-ink);
  content: "Concept visual";
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  padding: 6px 8px;
  text-transform: uppercase;
}

.desk-visual img {
  width: 100%;
  height: 100%;
  min-height: 470px;
  object-fit: cover;
}

.notice-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--rule-2);
  border-bottom: 1px solid var(--rule-2);
  background: var(--ink);
  color: var(--paper);
}

.notice-strip span {
  min-height: 76px;
  border-right: 1px solid rgb(255 255 255 / 0.12);
  color: rgb(255 255 255 / 0.72);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  line-height: 1.35;
  padding: 24px clamp(18px, 3vw, 36px);
  text-transform: uppercase;
}

.notice-strip span:last-child {
  border-right: 0;
}

.section {
  padding: clamp(92px, 10vw, 142px) clamp(22px, 4vw, 54px);
  scroll-margin-top: 84px;
}

.hero,
.notice-strip {
  scroll-margin-top: 84px;
}

.section-heading {
  max-width: 930px;
  margin-right: auto;
  margin-bottom: clamp(42px, 5.8vw, 70px);
  margin-left: auto;
  text-align: center;
}

.section-heading.centered {
  text-align: center;
}

.section-heading.compact {
  margin-bottom: 48px;
}

.section-heading p,
.split-heading > p,
.demo-main p,
.register-copy p,
.demo-aside p {
  color: var(--ink-3);
  font-size: 15px;
  line-height: 1.65;
}

.section-heading p {
  max-width: 720px;
  margin: 22px auto 0;
}

.section-program {
  background: var(--paper);
}

.section > .model-board,
.section > .split-heading,
.section > .stack-grid,
.section > .project-picker,
.section > .session-list,
.section > .rules-grid,
.section > .faq-list {
  max-width: 1280px;
  margin-right: auto;
  margin-left: auto;
}

.section > .split-heading {
  max-width: 930px;
}

.model-board {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: var(--rule);
}

.model-board article {
  display: grid;
  align-content: start;
  justify-items: center;
  gap: 13px;
  min-height: 310px;
  background: var(--paper);
  padding: clamp(28px, 3vw, 38px);
  text-align: center;
}

.model-board span,
.session-list span {
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.model-board strong {
  font-family: var(--serif);
  font-size: clamp(25px, 2.4vw, 32px);
  font-weight: 500;
  line-height: 1.06;
}

.model-board p,
.stack-grid p,
.session-list p,
.rules-grid p,
.faq-item p {
  margin: 0;
  color: var(--ink-3);
  font-size: 13.5px;
  line-height: 1.58;
}

.section-curriculum {
  border-top: 1px solid var(--rule-2);
  background: var(--paper-2);
}

.split-heading {
  display: block;
  max-width: 930px;
  margin-bottom: 58px;
  text-align: center;
}

.split-heading h2 {
  margin-right: auto;
  margin-left: auto;
}

.split-heading > p {
  max-width: 680px;
  margin: 22px auto 0;
}

.stack-grid,
.rules-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.stack-grid article,
.rules-grid article,
.project-picker,
.interest-form,
.faq-item,
.demo-main,
.demo-aside {
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: var(--paper);
}

.stack-grid article,
.rules-grid article {
  display: grid;
  align-content: start;
  justify-items: center;
  gap: 16px;
  min-height: 255px;
  padding: clamp(26px, 3vw, 34px);
  text-align: center;
}

.stack-grid span {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border: 1px solid color-mix(in oklab, var(--accent) 36%, var(--rule));
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-softer), var(--leaf-soft));
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 11px;
}

.project-picker {
  display: grid;
  justify-items: center;
  gap: 34px;
  margin-top: 24px;
  padding: clamp(30px, 4vw, 46px);
  text-align: center;
}

.project-picker .eyebrow {
  color: var(--accent-ink);
}

.project-picker h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(32px, 3.4vw, 46px);
  font-weight: 500;
  line-height: 1;
}

.project-picker p:not(.eyebrow) {
  max-width: 790px;
  margin: 16px auto 0;
  color: var(--ink-3);
  line-height: 1.6;
}

.section-schedule {
  border-top: 1px solid var(--rule-2);
  background: var(--paper);
}

.session-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.session-list article {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: var(--paper);
  padding: 24px;
}

.session-list h3 {
  margin-bottom: 7px;
}

.demo-section {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
  gap: 20px;
  border-top: 1px solid var(--rule-2);
  background: var(--ink);
  color: var(--paper);
}

.demo-main,
.demo-aside {
  background: rgb(255 255 255 / 0.055);
  border-color: rgb(255 255 255 / 0.12);
  padding: clamp(34px, 5vw, 62px);
}

.demo-main .eyebrow,
.demo-aside .eyebrow {
  color: color-mix(in oklab, var(--accent-soft) 84%, white);
}

.demo-main h2,
.demo-aside strong {
  color: var(--paper);
}

.demo-main p,
.demo-aside p {
  color: rgb(255 255 255 / 0.68);
}

.rubric-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 36px;
}

.rubric-grid span {
  border: 1px solid rgb(255 255 255 / 0.13);
  border-radius: 100px;
  background: rgb(255 255 255 / 0.06);
  color: rgb(255 255 255 / 0.78);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  padding: 8px 10px;
  text-transform: uppercase;
}

.demo-aside {
  display: grid;
  align-content: center;
}

.demo-aside strong {
  display: block;
  font-family: var(--serif);
  font-size: clamp(32px, 4.3vw, 52px);
  font-weight: 400;
  line-height: 0.98;
}

.ai-section {
  background: var(--paper);
}

.register-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(340px, 0.72fr);
  gap: clamp(42px, 7vw, 96px);
  align-items: start;
  border-top: 1px solid var(--rule-2);
  background: var(--paper-2);
}

.register-copy .disclaimer {
  max-width: 620px;
  margin-top: 30px;
  border: 1px solid color-mix(in oklab, var(--accent) 30%, var(--rule));
  border-radius: 6px;
  background: var(--accent-softer);
  color: var(--accent-ink);
  font-size: 13px;
  line-height: 1.5;
  padding: 16px 18px;
}

.interest-form {
  display: grid;
  gap: 18px;
  padding: clamp(24px, 3vw, 34px);
}

.interest-form label {
  display: grid;
  gap: 7px;
  color: var(--ink-2);
  font-size: 12.5px;
  font-weight: 650;
}

.interest-form input,
.interest-form select {
  width: 100%;
  height: 46px;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: var(--paper);
  color: var(--ink);
  padding: 0 12px;
  outline: none;
}

.interest-form input:focus,
.interest-form select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgb(12 115 255 / 0.12);
}

.form-status {
  min-height: 20px;
  margin: 0;
  color: var(--accent-ink);
  font-size: 12.5px;
  line-height: 1.45;
}

.faq-section {
  border-top: 1px solid var(--rule-2);
  background: var(--paper);
}

.faq-list {
  display: grid;
  gap: 12px;
  max-width: 980px;
  margin: 0 auto;
}

.faq-item {
  overflow: hidden;
}

.faq-item button {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-weight: 650;
  text-align: left;
  padding: 19px 22px;
}

.faq-item button span {
  flex: 0 0 auto;
  color: var(--accent-ink);
  font-family: var(--mono);
}

.faq-item p {
  display: none;
  padding: 0 22px 20px;
}

.faq-item.open {
  border-color: var(--ink);
}

.faq-item.open p {
  display: block;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-top: 1px solid var(--rule-2);
  background: var(--paper);
  padding: 42px clamp(18px, 4vw, 40px);
}

.site-footer p {
  max-width: 620px;
  margin: 13px 0 0;
  color: var(--ink-3);
  font-size: 13px;
  line-height: 1.55;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media (max-width: 1060px) {
  .preview-grid,
  .split-heading,
  .demo-section,
  .register-section {
    grid-template-columns: 1fr;
  }

  .preview-copy {
    border-right: 0;
    border-bottom: 1px solid var(--rule-2);
  }

  .preview-grid {
    min-height: auto;
  }

  .model-board,
  .stack-grid,
  .rules-grid,
  .notice-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .site-header {
    align-items: center;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: fixed;
    inset: 68px 12px auto 12px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    border: 1px solid var(--rule);
    border-radius: 4px;
    background: var(--paper);
    box-shadow: var(--shadow-panel);
    padding: 8px;
  }

  .site-nav.open {
    display: flex;
  }

  .site-nav a {
    border-radius: 4px;
    padding: 13px;
  }

  .nav-cta {
    background: var(--accent-softer);
  }

  .hero {
    padding-top: 72px;
  }

  .hero-logo {
    display: inline-flex;
    justify-items: initial;
    gap: 10px;
    margin-bottom: 24px;
  }

  .hero-logo-copy {
    justify-items: initial;
    text-align: left;
  }

  .hero-logo-copy span {
    justify-content: flex-start;
    gap: 7px;
    letter-spacing: 0.18em;
  }

  .sun-mark {
    top: -4px;
    right: -14px;
    width: 8px;
    height: 8px;
    box-shadow:
      0 -8px 0 -3.8px var(--sun),
      0 8px 0 -3.8px var(--sun),
      8px 0 0 -3.8px var(--sun),
      -8px 0 0 -3.8px var(--sun),
      6px 6px 0 -3.8px var(--sun),
      -6px 6px 0 -3.8px var(--sun),
      6px -6px 0 -3.8px var(--sun),
      -6px -6px 0 -3.8px var(--sun);
  }

  .browser-bar {
    grid-template-columns: 54px minmax(0, 1fr);
  }

  .browser-badge {
    display: none;
  }

  .model-board,
  .stack-grid,
  .rules-grid,
  .notice-strip,
  .session-list {
    grid-template-columns: 1fr;
  }

  .notice-strip span {
    border-right: 0;
    border-bottom: 1px solid rgb(255 255 255 / 0.12);
  }

  .notice-strip span:last-child {
    border-bottom: 0;
  }

  .project-picker,
  .site-footer {
    align-items: stretch;
    flex-direction: column;
  }

  .project-picker .btn,
  .site-footer .btn {
    width: 100%;
  }

  .desk-visual,
  .desk-visual img {
    min-height: 340px;
  }
}

@media (max-width: 520px) {
  .brand {
    gap: 9px;
    font-size: 15px;
  }

  .brand-mark {
    width: 42px;
    height: 24px;
  }

  h1 {
    font-size: clamp(44px, 13vw, 62px);
  }

  .hero-logo-copy strong {
    font-size: 18px;
  }

  .hero-logo-copy span {
    max-width: none;
    flex-wrap: nowrap;
    row-gap: 0;
    letter-spacing: 0.16em;
  }

  .preview-copy {
    padding: 28px;
  }

  .preview-copy h2 {
    font-size: clamp(32px, 10vw, 44px);
  }

  .hero-actions .btn,
  .interest-form .btn {
    width: 100%;
  }

  .session-list article {
    grid-template-columns: 1fr;
  }
}