@font-face {
  font-family: Inter;
  src: url("assets/Inter-Regular.ttf") format("truetype");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: Inter;
  src: url("assets/Inter-SemiBold.ttf") format("truetype");
  font-weight: 500 700;
  font-display: swap;
}
:root {
  color-scheme: light;
  --bg: #f5f7fc;
  --paper: #fff;
  --ink: #181d27;
  --muted: #535862;
  --line: #d9e1ee;
  --blue: #295bff;
  --link: #00259e;
  --wash: #eaf0ff;
  --radius: 7px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #0d1622;
    --paper: #172232;
    --ink: #f2f6fa;
    --muted: #afbece;
    --line: #344256;
    --blue: #79bfff;
    --link: #79bfff;
    --wash: #162c49;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0d1622;
  --paper: #172232;
  --ink: #f2f6fa;
  --muted: #afbece;
  --line: #344256;
  --blue: #79bfff;
  --link: #79bfff;
  --wash: #162c49;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 32px;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font:
    400 16px/1.6 Inter,
    system-ui,
    sans-serif;
  font-feature-settings:
    "fina" on,
    "init" on;
}
a {
  color: var(--link);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}
button {
  font: inherit;
}
a,
button,
summary {
  touch-action: manipulation;
}
:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 4px;
}
img {
  max-width: 100%;
  height: auto;
}
h1,
h2,
h3,
p {
  margin: 0;
}
h1,
h2,
h3 {
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.02em;
}
h1 {
  font-size: clamp(46px, 5.3vw, 72px);
  margin: 24px 0;
}
h2 {
  font-size: clamp(32px, 3.8vw, 48px);
}
h3 {
  font-size: 20px;
}
p {
  color: var(--muted);
}
.wrap {
  max-width: 1280px;
  padding-left: 40px;
  padding-right: 40px;
  margin: auto;
}
.section {
  padding-top: 88px;
  padding-bottom: 88px;
}
.eyebrow,
.chapter {
  font-size: 11px;
  letter-spacing: 0.06em;
  font-weight: 600;
  color: var(--link);
}
.eyebrow {
  margin-bottom: 18px;
}
.mono {
  font-family: "Cascadia Code", Consolas, monospace;
}
.blue {
  color: var(--blue);
}
.fine,
.caption {
  font-size: 13px;
  color: var(--muted);
}
.fine {
  margin-top: 20px;
}
.caption {
  max-width: 940px;
  margin: 16px auto 0;
}
.skip {
  position: fixed;
  top: -80px;
  left: 20px;
  padding: 12px;
  background: var(--paper);
  z-index: 10;
}
.skip:focus {
  top: 12px;
}
.site-header {
  max-width: 1440px;
  margin: auto;
  padding: 20px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-weight: 600;
  line-height: 1.2;
  font-size: 18px;
}
.brand:hover {
  text-decoration: none;
}
.brand small {
  display: block;
  font-size: 9px;
  letter-spacing: 0.12em;
  margin-top: 6px;
  color: var(--muted);
}
sup {
  font-size: 10px;
  vertical-align: super;
}
.site-header nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 13px;
}
.site-header nav > a:not(.button) {
  color: var(--muted);
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 12px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  transition:
    background 90ms,
    transform 90ms;
}
.button:hover {
  background: var(--wash);
  text-decoration: none;
}
.button:active {
  transform: scale(0.985);
}
.button.primary {
  background: #295bff;
  border-color: #295bff;
  color: white;
}
.button.primary:hover {
  background: #1749e8;
}
.button.small {
  padding: 9px 16px;
}
.text-link {
  font-size: 14px;
  font-weight: 600;
}
.hero {
  display: grid;
  grid-template-columns: 1.08fr 1fr;
  gap: 64px;
  align-items: center;
  padding-top: 76px;
  padding-bottom: 72px;
}
.hero .eyebrow {
  display: flex;
  gap: 9px;
  align-items: center;
}
.status-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  flex: none;
  border-radius: 50%;
  background: #79bfff;
}
.hero .status-dot {
  background: var(--blue);
}
.lede {
  font-size: 18px;
  line-height: 1.65;
  max-width: 480px;
}
.actions {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-top: 28px;
  flex-wrap: wrap;
}
.hero-visual {
  background: #10295a;
  color: white;
  min-height: 465px;
  padding: 28px;
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
  background-image: radial-gradient(#31558b 1px, transparent 1px);
  background-size: 20px 20px;
}
.visual-header,
.visual-footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 10px;
  letter-spacing: 0.06em;
  color: #d1e3ff;
}
.visual-header {
  padding-bottom: 34px;
}
.idea-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  width: 77%;
  padding: 18px;
  border: 1px solid #5782bc;
  border-radius: var(--radius);
  background: #19396a;
  z-index: 1;
}
.idea-card > span {
  flex: 1;
  font-size: 18px;
  font-weight: 600;
}
.idea-card small {
  display: block;
  font-size: 9px;
  letter-spacing: 0.1em;
  color: #bcd7ff;
  margin-bottom: 4px;
}
.idea-card > .mono {
  font-size: 11px;
  color: #bcd7ff;
  font-weight: 400;
}
.idea-card i {
  display: block;
  width: 7px;
  height: 7px;
  flex: none;
  background: #79bfff;
  border-radius: 50%;
}
.idea-card.middle {
  margin: 28px 0 28px 12%;
}
.idea-card.result {
  margin-left: 23%;
  background: #214c86;
}
.wire {
  position: absolute;
  border: 2px solid #79bfff;
  border-left: 0;
  border-top: 0;
  width: 90px;
  height: 62px;
  top: 162px;
  left: 70%;
  border-radius: 0 0 7px 0;
}
.wire.second {
  top: 270px;
  left: 14%;
  transform: rotate(180deg);
}
.visual-footer {
  justify-content: flex-start;
  align-items: center;
  margin-top: 32px;
  letter-spacing: 0;
  font-size: 11px;
}
.facts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding-top: 24px;
  padding-bottom: 32px;
  border-top: 1px solid var(--line);
  gap: 24px;
}
.facts > div {
  display: flex;
  align-items: baseline;
  gap: 14px;
}
.facts strong {
  font-size: 36px;
  letter-spacing: -0.02em;
  font-weight: 600;
}
.facts span {
  font-size: 13px;
  color: var(--muted);
}
.workspace {
  background: var(--paper);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.section-heading {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 80px;
  align-items: end;
  margin-bottom: 40px;
}
.section-heading > p {
  max-width: 440px;
}
.screen-frame {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.04);
}
.screen-frame img {
  display: block;
  width: 100%;
}
.screen-label {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 12px 20px;
  font-size: 10px;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}
.feature-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  margin-top: 48px;
}
.feature-row h3 {
  margin: 14px 0;
}
.feature-row p {
  font-size: 14px;
}
.course-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 64px;
}
.course-note {
  border-top: 3px solid var(--blue);
  padding-top: 24px;
}
.course-note h3 {
  font-size: 28px;
  margin: 16px 0;
}
.course-note p {
  font-size: 14px;
  margin-bottom: 24px;
}
details {
  border-bottom: 1px solid var(--line);
}
summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  gap: 28px;
  align-items: center;
  padding: 24px 0;
  font-weight: 600;
}
summary::-webkit-details-marker {
  display: none;
}
.syllabus summary > .mono {
  font-size: 13px;
  color: var(--link);
  min-width: 56px;
}
.syllabus summary > span:nth-child(2) {
  flex: 1;
}
.syllabus small {
  display: block;
  font-size: 12px;
  font-weight: 400;
  color: var(--muted);
  margin-top: 4px;
}
.expand {
  font-size: 24px;
  font-weight: 400;
  color: var(--link);
}
details[open] .expand {
  transform: rotate(45deg);
}
.syllabus ol {
  padding: 0 20px 24px 110px;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}
.syllabus li {
  padding: 6px 0 6px 8px;
}
.subjects {
  background: var(--wash);
}
.section-intro {
  max-width: 630px;
  margin-top: 20px;
}
.subject-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  margin-top: 40px;
}
.subject-grid article {
  padding: 20px 0;
  border-top: 1px solid var(--line);
}
.subject-grid article > .mono {
  color: var(--link);
  font-size: 12px;
}
.subject-grid h3 {
  font-size: 18px;
  margin: 16px 0 12px;
}
.subject-grid p {
  font-size: 14px;
}
.reference {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 96px;
  align-items: center;
}
.reference p:not(.eyebrow) {
  margin-top: 24px;
}
.reference .text-link {
  display: inline-block;
  margin-top: 24px;
}
.reference-preview {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.reference-heading {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding: 24px;
  border-bottom: 1px solid var(--line);
  font-size: 11px;
}
.reference-item {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  margin: 0 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}
.reference-item > .mono {
  font-size: 12px;
  color: var(--link);
}
.reference-item strong {
  font-size: 14px;
  font-weight: 600;
}
.reference-item p {
  margin: 6px 0 0 !important;
  font-size: 12px;
}
.reference-bottom {
  padding: 20px 24px;
  font-size: 11px;
  color: var(--muted);
}
.availability {
  background: #10295a;
  color: white;
}
.availability-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 96px;
  align-items: center;
}
.availability .eyebrow {
  color: #bcd7ff;
}
.availability p {
  color: #d3e4ff;
  margin-top: 24px;
  max-width: 460px;
}
.release-card {
  border: 1px solid #5274a6;
  border-radius: var(--radius);
  padding: 32px;
  background: #163766;
}
.badge {
  display: inline-block;
  border: 1px solid #6f92c0;
  border-radius: 4px;
  padding: 5px 9px;
  font-size: 10px;
  letter-spacing: 0.05em;
  color: #d3e4ff;
}
.release-card h3 {
  font-size: 24px;
  margin-top: 20px;
}
.release-card p {
  font-size: 14px;
}
.release-card .button {
  margin-top: 24px;
  background: white;
  color: #181d27;
  border: 0;
}
.release-card p.fine {
  font-size: 12px;
}
.faq {
  max-width: 960px;
}
.faq h2 {
  margin-bottom: 24px;
}
.faq summary {
  font-size: 16px;
}
.faq summary:after {
  content: "+";
  margin-left: auto;
  color: var(--link);
  font-size: 22px;
  font-weight: 400;
}
.faq details[open] summary:after {
  content: "−";
}
.faq details p {
  padding: 0 40px 24px 0;
  font-size: 14px;
}
footer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  border-top: 1px solid var(--line);
  padding-top: 36px;
  padding-bottom: 32px;
  font-size: 13px;
}
.footer-brand {
  font-size: 18px;
  font-weight: 600;
}
.footer-brand small {
  display: block;
  font-size: 12px;
  color: var(--muted);
  font-weight: 400;
  margin-top: 6px;
}
footer nav {
  display: flex;
  gap: 24px;
  align-items: center;
  flex-wrap: wrap;
}
footer p {
  grid-column: 1/-1;
  font-size: 11px;
}
footer button {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  padding: 8px 12px;
  font-size: 12px;
  cursor: pointer;
}
@media (max-width: 1050px) {
  .hero {
    gap: 32px;
  }
  .hero-visual {
    padding: 24px;
  }
  .idea-card > span {
    font-size: 16px;
  }
  .facts > div {
    display: block;
  }
  .facts span {
    display: block;
  }
  .course-layout {
    grid-template-columns: 240px 1fr;
    gap: 40px;
  }
  .section-heading,
  .reference,
  .availability-grid {
    gap: 40px;
  }
  .subject-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  footer {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 760px) {
  .wrap {
    padding-left: 24px;
    padding-right: 24px;
  }
  .site-header {
    padding: 18px 24px;
    flex-wrap: wrap;
    gap: 20px;
  }
  .site-header nav {
    gap: 18px;
    width: 100%;
    justify-content: space-between;
    font-size: 12px;
  }
  .site-header .button {
    padding: 8px 10px;
  }
  .hero {
    grid-template-columns: 1fr;
    padding-top: 44px;
    gap: 40px;
  }
  .hero h1 {
    font-size: 48px;
  }
  .hero-visual {
    max-width: 520px;
    width: 100%;
    min-height: 445px;
  }
  .hero-visual .idea-card {
    max-width: 350px;
  }
  .facts {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .facts strong {
    font-size: 30px;
  }
  .section {
    padding-top: 64px;
    padding-bottom: 64px;
  }
  .section-heading,
  .reference,
  .availability-grid,
  .course-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .section-heading h2 br {
    display: none;
  }
  .section-heading {
    margin-bottom: 28px;
  }
  .feature-row {
    grid-template-columns: 1fr;
    gap: 28px;
    margin-top: 32px;
  }
  .feature-row h3 {
    margin: 8px 0;
  }
  .screen-label {
    font-size: 9px;
    padding: 10px;
    gap: 12px;
  }
  .screen-label > span:last-child {
    max-width: 65%;
    text-align: right;
  }
  .course-note .fine {
    margin-top: 8px;
  }
  .course-note p {
    max-width: 500px;
  }
  .syllabus summary {
    gap: 16px;
    font-size: 14px;
  }
  .syllabus ol {
    padding-left: 80px;
  }
  .subject-grid {
    gap: 20px;
  }
  .subject-grid h3 {
    line-height: 1.3;
  }
  .reference {
    gap: 40px;
  }
  .availability-grid {
    gap: 36px;
  }
  .release-card {
    padding: 24px;
  }
  footer nav {
    gap: 16px;
  }
  footer p {
    line-height: 1.7;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *:before,
  *:after {
    transition: none !important;
    animation: none !important;
  }
}

.tool-diagram {
  display: block;
  margin-bottom: 1.25rem;
  color: var(--blue, #295bff);
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  font-weight: 600;
  letter-spacing: -.025em;
}