@charset "UTF-8";

:root {
  --ink: #202124;
  --muted: #666971;
  --blue: #075dcc;
  --blue-hover: #004da9;
  --paper: #f5f5f7;
  --line: #dedee3;
  --max-width: 1120px;
  --radius: 24px;
  --font: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; }
body { margin: 0; color: var(--ink); background: white; font-family: var(--font); font-size: 16px; line-height: 1.8; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button, summary, label { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
a, button, summary { touch-action: manipulation; }
img, svg { display: block; max-width: 100%; }
img { height: auto; }
figure, p, h1, h2, h3 { margin: 0; }
h1, h2, h3 { line-height: 1.35; font-weight: 700; font-feature-settings: "palt"; text-wrap: balance; }
h2 { font-size: clamp(32px, 3.4vw, 46px); letter-spacing: -.05em; }
h3 { letter-spacing: -.035em; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid #1671e8; outline-offset: 5px; }
::selection { background: #cbdfff; color: #182840; }
.container { width: min(var(--max-width), calc(100% - 96px)); margin-inline: auto; }
.section-space { padding-block: 104px; }
.eyebrow { font-size: 14px; font-weight: 650; letter-spacing: .12em; line-height: 1.5; margin-bottom: 17px; color: var(--muted); }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 10px; background: var(--blue); color: white; padding: 11px 25px; border-radius: 50px; font-size: 16px; line-height: 1.5; font-weight: 500; transition: background .2s, transform .2s; }
.button:hover { background: var(--blue-hover); transform: translateY(-1px); }
.button-small { font-size: 14px; padding: 9px 17px; }
.text-link { display: inline-flex; align-items: center; gap: 10px; color: var(--blue); font-size: 16px; font-weight: 500; }
.text-link > span { font-size: 25px; line-height: 1; transition: transform .2s; }
.text-link:hover > span { transform: translateX(3px); }
.text-link:hover { text-decoration: underline; text-underline-offset: 4px; }
.skip-link { position: fixed; z-index: 30; left: 20px; top: 12px; background: white; padding: 10px 20px; border-radius: 8px; transform: translateY(-150%); }
.skip-link:focus { transform: none; }
.site-header { position: sticky; top: 0; z-index: 20; background: rgb(255 255 255 / 92%); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); border-bottom: 1px solid rgb(0 0 0 / 6%); }
.nav-shell { width: min(1200px, calc(100% - 80px)); min-height: 72px; margin: auto; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; gap: 9px; align-items: center; font-size: 26px; font-weight: 760; letter-spacing: -.065em; line-height: 1.2; white-space: nowrap; }
.brand-symbol { color: var(--blue); flex-shrink: 0; }
.brand-school { font-size: 14px; font-weight: 600; letter-spacing: -.03em; margin-left: 8px; }
.site-header nav { display: flex; gap: 29px; align-items: center; }
.site-header nav > a { font-size: 14px; }
.site-header nav > a:not(.button):hover, .site-header nav > a[aria-current]:not(.button) { color: var(--blue); }
.menu-toggle { display: none; }
.announcement { display: flex; justify-content: center; align-items: center; gap: 17px; padding: 12px 24px; font-size: 14px; background: #ecf2fd; line-height: 1.65; }
.announcement a { color: var(--blue); }
.announcement a:hover { text-decoration: underline; }
.demo-badge { display: inline-block; font-size: 14px; letter-spacing: .035em; font-weight: 600; color: #606671; }
.announcement .demo-badge { font-size: 14px; letter-spacing: .06em; color: #486386; }
.hero { background: var(--paper); overflow: hidden; text-align: center; padding-top: 38px; }
.hero .eyebrow { color: #535c6c; letter-spacing: .15em; margin-bottom: 14px; }
.hero h1 { font-size: clamp(46px, 5vw, 70px); letter-spacing: -.065em; line-height: 1.16; }
.hero h1 > span { color: #1863d6; }
.hero-description { font-size: 18px; line-height: 1.75; margin-top: 17px; color: #4e5056; }
.hero-actions { display: flex; align-items: center; justify-content: center; gap: 28px; margin-top: 20px; }
.hero-visual { position: relative; width: min(740px, 92%); margin: 2px auto 0; padding-bottom: 25px; }
.hero-visual img { width: 100%; mask-image: linear-gradient(to right, transparent 0, #000 7%, #000 93%, transparent 100%), linear-gradient(to bottom, transparent 0, #000 7%, #000 89%, transparent 100%); mask-composite: intersect; }
.hero-visual figcaption { font-size: 14px; letter-spacing: .19em; color: #626976; margin-top: -21px; position: relative; }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 32px; margin-bottom: 42px; }
.section-heading > p { flex-shrink: 0; color: var(--muted); padding-bottom: 4px; line-height: 1.85; }
.course-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; align-items: start; }
.course-card { border-radius: var(--radius); overflow: hidden; background: var(--paper); }
.course-copy { padding: 31px 28px 0; }
.course-kicker { font-size: 14px; font-weight: 550; letter-spacing: .025em; color: #666a74; white-space: nowrap; }
.course-copy h3 { font-size: clamp(21px, 1.85vw, 26px); margin: 10px 0 7px; white-space: nowrap; }
.course-copy > p:last-child { font-size: 16px; color: #53555e; }
.course-art { height: 245px; position: relative; margin-top: 15px; overflow: hidden; }
.course-bottom { padding: 0 28px 20px; }
.course-tags { font-size: 14px; color: #676b74; margin-bottom: 18px; letter-spacing: -.035em; }
details { border-top: 1px solid #d5d7df; }
summary { cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 8px; list-style: none; font-size: 16px; font-weight: 500; padding: 17px 0 2px; }
summary::-webkit-details-marker { display: none; }
.plus { width: 27px; height: 27px; background: #e3e5ea; border-radius: 50%; position: relative; flex: 0 0 auto; transition: transform .2s; }
.plus::before, .plus::after { content: ""; width: 11px; height: 1.5px; background: #3a404a; position: absolute; top: calc(50% - .75px); left: 8px; }
.plus::after { transform: rotate(90deg); }
details[open] .plus { transform: rotate(45deg); }
summary:hover { color: var(--blue); }
.detail-body { padding-top: 20px; font-size: 16px; line-height: 1.85; }
.detail-label { margin-top: 20px; font-size: 14px; font-weight: 700; }
.detail-body .text-link { margin-top: 16px; }
.section-note { color: var(--muted); font-size: 14px; margin-top: 23px; }

/* 学習分野のビジュアルは、編集可能なHTMLとCSSで構成。 */
.code-art { display: grid; place-items: center; }
.code-window { width: 94%; background: #142030; border: 1px solid #526379; color: #e4effd; border-radius: 10px; transform: perspective(800px) rotateY(-12deg) rotateZ(-4deg) translate(12px, 2px); box-shadow: 8px 18px 28px #1e437c25; }
.window-toolbar { display: flex; align-items: center; gap: 5px; height: 34px; background: #253245; padding-inline: 10px; border-radius: 9px 9px 0 0; }
.window-toolbar i { width: 6px; height: 6px; background: #8190a7; border-radius: 50%; }
.window-toolbar span { margin-left: 5px; font-family: monospace; font-size: 14px; }
.code-lines { font-family: monospace; padding: 15px 10px; font-size: 14px; line-height: 1.7; }
.code-lines > span { display: flex; gap: 14px; color: #7c8da5; white-space: nowrap; }
.code-lines b { font-weight: 400; color: #d0e4ff; }
.code-lines em { font-style: normal; color: #8bc6ff; }
.code-muted b { color: #a0b3cb; }
.terminal-line { display: flex; gap: 8px; font-family: monospace; font-size: 14px; padding: 9px 10px; border-top: 1px solid #3a485a; color: #83e1bd; white-space: nowrap; }
.terminal-dot { width: 6px; height: 6px; border-radius: 50%; background: #83e1bd; align-self: center; }
.code-orb { position: absolute; bottom: 13px; right: 20px; width: 59px; height: 59px; color: #fff; font: 500 24px/59px monospace; text-align: center; background: linear-gradient(145deg, #85b9ff, #1465df 60%, #183c85); border-radius: 17px; box-shadow: 0 9px 20px #416ab340; transform: rotate(9deg); }
.course-game { background: #f4f2fa; }
.game-art { perspective: 600px; }
.game-sphere { position: absolute; left: calc(50% - 72px); top: 45px; width: 144px; height: 144px; border-radius: 50%; background: radial-gradient(circle at 28% 24%, #efe9ff 0, #a1a8fa 12%, #5b49dc 42%, #2a1c66 70%, #170f49 100%); box-shadow: inset -6px -8px 18px #3e267e, 0 30px 30px #786dbd35; }
.orbital { position: absolute; left: calc(50% - 119px); top: 44px; width: 238px; height: 134px; border: 8px solid #c4b4ee; border-radius: 50%; z-index: 2; transform: rotate(-33deg); box-shadow: 0 5px 5px #43308030, inset 0 4px 4px white; }
.orbital-one { clip-path: polygon(0 10%, 100% 10%, 100% 100%, 0 100%); border-top-color: #b7b6f7; }
.orbital-two { transform: rotate(53deg); border-width: 3px; z-index: 0; width: 219px; left: calc(50% - 109px); border-color: #ad95d7; }
.spark { position: absolute; font-size: 33px; color: #a098d5; }
.spark-one { top: 18px; right: 44px; }
.spark-two { left: 39px; bottom: 24px; font-size: 22px; }
.game-floor { position: absolute; bottom: 15px; left: 18%; right: 18%; height: 10px; border-radius: 50%; background: #6a4e9930; filter: blur(12px); }
.course-design { background: #f3f5f5; }
.design-board { position: absolute; top: 10px; width: 208px; height: 210px; left: calc(50% - 104px); background: #fffae9; border: 1px solid #ddd9c9; border-radius: 9px; box-shadow: 5px 11px 15px #55665216; transform: rotate(-6deg); padding: 13px 16px; }
.design-topbar, .design-bottom { display: flex; justify-content: space-between; font-size: 14px; color: #42624d; }
.design-topbar { font-weight: 700; }
.design-title { font-size: 24px; font-weight: 650; line-height: 1.1; letter-spacing: -.04em; margin-top: 15px; color: #385544; }
.design-bottom { position: absolute; bottom: 12px; right: 14px; left: 14px; border-top: 1px solid #c4ceb9; padding-top: 7px; }
.design-flower { position: absolute; height: 78px; width: 78px; right: 26px; top: 85px; }
.design-flower i { width: 29px; height: 48px; background: #efb47a; position: absolute; top: 0; left: 24px; border-radius: 50%; transform-origin: 50% 80%; }
.design-flower i:nth-child(2) { transform: rotate(60deg); }
.design-flower i:nth-child(3) { transform: rotate(120deg); }
.design-flower i:nth-child(4) { transform: rotate(180deg); }
.design-flower i:nth-child(5) { transform: rotate(240deg); }
.design-flower i:nth-child(6) { transform: rotate(300deg); }
.design-flower b { position: absolute; width: 21px; height: 21px; border-radius: 50%; background: #8c683a; top: 28px; left: 28px; }
.color-swatches { position: absolute; left: 20px; bottom: 20px; display: flex; padding: 8px; background: white; border-radius: 9px; box-shadow: 0 7px 20px #354a3217; transform: rotate(5deg); }
.color-swatches i { width: 22px; height: 28px; background: #385544; }
.color-swatches i:nth-child(2) { background: #85a18c; }
.color-swatches i:nth-child(3) { background: #f1b984; }
.color-swatches i:nth-child(4) { background: #f7efd5; }
.design-cursor { position: absolute; font: 50px/1 sans-serif; color: #377953; right: 45px; bottom: 35px; text-shadow: 2px 2px white; transform: rotate(-9deg); }

.learning { background: #111216; color: #f5f5f7; }
.learning .eyebrow { color: #9ca3b0; }
.learning-intro { display: flex; gap: 32px; align-items: flex-end; justify-content: space-between; }
.learning h2 { font-size: clamp(32px, 3.5vw, 46px); line-height: 1.5; }
.learning h2 span { color: #879bff; }
.learning-intro > p { color: #aaadb8; flex-shrink: 0; padding-bottom: 8px; }
.learning-steps { list-style: none; margin: 61px 0 35px; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); }
.learning-steps li { position: relative; border-top: 1px solid #41434b; padding: 24px 22px 16px 0; }
.learning-steps li + li { padding-left: 26px; border-left: 1px solid #41434b; }
.step-number { color: #9ea2af; font-size: 14px; }
.step-english { display: block; margin: 28px 0 15px; font-size: 48px; letter-spacing: -.04em; font-weight: 600; line-height: 1; }
.learning-steps h3 { font-size: 20px; margin-bottom: 12px; }
.learning-steps p { color: #aaadb8; font-size: 16px; }
.step-arrow { position: absolute; top: 23px; right: 25px; font-size: 23px; color: #919bb4; }
.learning .text-link { color: #99b9ff; }
.project-grid { display: grid; grid-template-columns: 1.16fr 1fr; gap: 26px; align-items: start; }
.project { border-radius: var(--radius); overflow: hidden; background: var(--paper); }
.project-art { height: 350px; position: relative; overflow: hidden; }
.app-art { background: #e3edf2; display: grid; place-items: center; }
.habit-card { width: 245px; padding: 20px; border-radius: 23px; background: #fff; transform: rotate(-7deg) translateX(-28px); box-shadow: 0 23px 35px #557d8226; }
.habit-header { display: flex; justify-content: space-between; font-size: 17px; font-weight: 700; color: #2b5449; }
.habit-header > span:last-child { color: #ac7e33; }
.habit-greeting { font-size: 14px; color: #6d7772; }
.habit-ring { margin: 13px auto; width: 128px; height: 128px; display: grid; place-items: center; border-radius: 50%; background: conic-gradient(#629184 0 75%, #e8ecea 75% 100%); }
.habit-ring > div { border-radius: 50%; width: 106px; height: 106px; display: flex; align-items: center; justify-content: center; flex-direction: column; background: white; }
.habit-ring strong { font-size: 39px; color: #2b5449; line-height: 1.2; }
.habit-ring strong span { font-size: 18px; font-weight: 400; color: #7c8983; }
.habit-ring div > span { font-size: 14px; color: #737d76; }
.habit-row { display: flex; align-items: center; gap: 6px; font-size: 14px; padding: 7px 0; color: #40574c; }
.habit-row > span:last-child { margin-left: auto; color: #748479; }
.habit-check { width: 17px; height: 17px; border-radius: 50%; background: #638d7e; color: white; line-height: 17px; text-align: center; }
.habit-week { display: flex; justify-content: space-between; font-size: 14px; margin-top: 12px; color: #747b75; }
.habit-week span { width: 23px; height: 23px; text-align: center; line-height: 23px; }
.habit-week .active { background: #486a5c; border-radius: 50%; color: white; }
.floating-note { position: absolute; top: 135px; left: 58%; padding: 17px 20px; border: 1px solid #ffffffb3; border-radius: 13px; background: #ffffffdc; box-shadow: 0 8px 26px #38526613; backdrop-filter: blur(12px); color: #426654; font-size: 15px; line-height: 1.8; transform: rotate(5deg); white-space: nowrap; }
.floating-note > span { position: absolute; font-size: 26px; top: -29px; right: -2px; color: #547f78; }
.world-art { background: radial-gradient(ellipse at 50% 100%, #504a6f, #1c2138 65%, #151c30); }
.world-moon { position: absolute; width: 42px; height: 42px; border-radius: 50%; background: radial-gradient(circle at 33% 24%, #f9d6bd, #af8e8c 53%, #5a526d); top: 45px; right: 60px; }
.world-portal { position: absolute; width: 158px; height: 211px; border: 7px solid #bdceff; border-bottom: none; border-radius: 100px 100px 0 0; left: calc(50% - 79px); top: 57px; box-shadow: 0 0 15px #a2b9ff, inset 0 0 25px #5c7ccd, 0 0 60px #b1a9e03d; background: radial-gradient(ellipse at 50% 100%, #8d7cab, #4d4f82 50%, #252b4c 80%); }
.world-grid { position: absolute; top: 266px; width: 180%; height: 250px; left: -40%; background-image: linear-gradient(#9895c73d 1px, transparent 1px), linear-gradient(90deg, #9895c73d 1px, transparent 1px); background-size: 42px 42px; transform-origin: 50% 0; transform: perspective(200px) rotateX(55deg); }
.world-title { position: absolute; bottom: 29px; left: 30px; font-size: 34px; font-weight: 700; line-height: .95; letter-spacing: -.025em; color: #f0ecfd; text-shadow: 0 2px 9px #20243b; }
.world-title span { display: block; font-size: 14px; letter-spacing: .08em; line-height: 1.6; margin-top: 12px; }
.project-copy { padding: 27px 29px 24px; }
.project-category { font-size: 14px; color: var(--muted); letter-spacing: .035em; }
.project h3 { font-size: 23px; margin: 10px 0 8px; }
.project-copy > p { color: var(--muted); }
.project details { margin-top: 20px; }
.project details > p { padding-top: 20px; color: var(--muted); }
.campus { padding-top: 15px; }
.campus-heading { text-align: center; padding-bottom: 44px; }
.campus-heading > p:last-child { margin-top: 23px; color: var(--muted); line-height: 1.9; }
.campus-figure { position: relative; margin: 0 24px; border-radius: 25px; overflow: hidden; }
.campus-figure img { width: 100%; aspect-ratio: 2.35; object-fit: cover; }
.campus-figure figcaption { position: absolute; bottom: 15px; right: 20px; color: white; padding: 5px 12px; border-radius: 6px; font-size: 14px; background: #1d2536b0; }
.campus-features { display: grid; grid-template-columns: 1fr 1fr auto; gap: 30px; padding-block: 38px 0; align-items: center; }
.campus-features > div > span { font-size: 14px; color: var(--muted); letter-spacing: .04em; }
.campus-features h3 { font-size: 22px; margin: 10px 0; }
.campus-features p { color: var(--muted); }
.experience { padding-bottom: 80px; }
.experience-panel { border-radius: 30px; background: #edf3fe; padding: 58px 54px; display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.experience-intro .eyebrow { color: #536c9b; }
.experience-intro h2 { font-size: clamp(29px, 2.95vw, 40px); line-height: 1.45; white-space: nowrap; }
.experience-intro > p:not(.eyebrow) { color: #5d667a; margin-top: 23px; }
.experience-label { display: block; color: #52668c; font-size: 14px; letter-spacing: .06em; margin-top: 64px; }
fieldset { border: 0; padding: 0; margin: 0; min-width: 0; }
.experience-picker fieldset { display: none; }
.js .experience-picker fieldset { display: block; }
legend { font-size: 14px; font-weight: 600; padding: 0; margin-bottom: 14px; }
.experience-options { display: flex; padding: 5px; gap: 4px; border-radius: 50px; background: #dfe8f8; }
.experience-options label { flex: 1; position: relative; cursor: pointer; text-align: center; }
.experience-options input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.experience-options label > span { display: block; font-size: 14px; line-height: 1.5; padding: 11px 8px; color: #40526f; border-radius: 50px; transition: background .15s, color .15s; white-space: nowrap; }
.experience-options input:checked + span { background: white; color: #144bb4; box-shadow: 0 2px 5px #243c8014; }
.experience-options input:focus-visible + span { outline: 3px solid #1671e8; outline-offset: 2px; }
.experience-result { padding: 29px 29px 25px; background: white; border-radius: 19px; margin-top: 17px; min-height: 317px; }
.session-meta { color: #526889; font-size: 14px; letter-spacing: .07em; }
.experience-result h3 { font-size: 27px; line-height: 1.45; margin: 12px 0; white-space: pre-line; }
.experience-result > p { font-size: 16px; color: #606772; line-height: 1.8; }
.session-flow { display: flex; list-style: none; padding: 20px 0 0; margin: 20px 0 0; border-top: 1px solid #e2e8f1; gap: 17px; }
.session-flow li { font-size: 14px; color: #535f74; }
.session-flow span { display: block; font-size: 14px; color: var(--blue); margin-bottom: 5px; }
.demo-notice { font-size: 14px; color: #5f6d85; margin-top: 15px; line-height: 1.7; }
.noscript-programs { font-size: 16px; padding-top: 20px; }
.noscript-programs h3 { font-size: 18px; margin-top: 16px; }
.site-footer { background: var(--paper); padding-block: 43px 28px; }
.footer-top { display: flex; align-items: center; gap: 28px; padding-bottom: 35px; }
.footer-top p { color: #5e626b; font-size: 14px; }
.back-top { margin-left: auto; font-size: 14px; color: #5e626b; }
.back-top > span { margin-left: 8px; }
.back-top:hover { color: var(--blue); }
.footer-bottom { border-top: 1px solid var(--line); padding-top: 24px; display: flex; align-items: flex-end; justify-content: space-between; gap: 22px; }
.footer-bottom > p, .copyright { font-size: 14px; color: var(--muted); line-height: 1.8; }
.footer-bottom .demo-badge { color: #515b6d; margin-right: 7px; }
.copyright { white-space: nowrap; }


.footer-directory { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 30px; padding: 0 0 34px; }
.footer-directory h2 { font-size: 14px; letter-spacing: 0; margin-bottom: 12px; }
.footer-directory a { display: block; width: fit-content; font-size: 14px; color: var(--muted); padding-block: 5px; }
.footer-directory a:hover { color: var(--blue); text-decoration: underline; }
.plan-link { margin-top: 20px; }
@media (max-width: 620px) { .footer-directory { grid-template-columns: 1fr 1fr; gap: 23px 15px; } }

@media (min-width: 1600px) {
  .hero-visual { width: 910px; }
}
@media (max-width: 1150px) {
  .nav-shell { width: calc(100% - 48px); gap: 20px; }
  .brand-school { display: none; }
  .site-header nav { gap: 25px; }
  .container { width: calc(100% - 64px); }
  .course-grid { gap: 16px; }
  .course-copy { padding-inline: 21px; }
  .course-bottom { padding-inline: 21px; }
  .course-kicker { white-space: normal; min-height: 44px; line-height: 1.5; }
  .course-copy h3 { font-size: 22px; white-space: normal; }
  .course-copy > p:last-child { min-height: 58px; }
  .course-tags { min-height: 50px; }
  .learning-intro { align-items: flex-start; flex-direction: column; }
  .learning-intro > p br:first-child { display: none; }
  .experience-panel { padding: 44px 32px; gap: 35px; }
  .experience-intro h2 { white-space: normal; }
  .session-flow { gap: 12px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 900px) {
  .site-header { position: static; }
  .js .site-header { position: sticky; }
  .nav-shell { flex-wrap: wrap; }
  .site-header nav { flex: 1 0 100%; display: flex; flex-direction: column; align-items: stretch; padding: 0 0 22px; gap: 0; }
  .site-header nav > a { padding: 13px 7px; font-size: 16px; }
  .site-header nav .button { margin-top: 8px; padding-block: 12px; }
  .js .site-header nav { display: none; }
  .js .site-header nav.is-open { display: flex; }
  .menu-toggle { display: flex; align-items: center; justify-content: center; gap: 12px; border: 0; background: transparent; color: #50555d; font-size: 14px; padding: 14px 0 14px 14px; }
  .menu-lines { width: 19px; height: 10px; border-top: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; }
  .menu-toggle[aria-expanded="true"] .menu-lines { height: 0; border-bottom: 0; transform: rotate(-45deg); }
  .menu-toggle[aria-expanded="true"] .menu-lines::after { content: ""; display: block; border-top: 1.5px solid currentColor; transform: rotate(90deg) translateX(1px); }
}
@media (max-width: 800px) {
  .container { width: calc(100% - 48px); }
  .nav-shell { flex-wrap: wrap; }
  .announcement { gap: 10px; }
  .announcement .demo-badge { display: none; }
  .hero { padding-top: 42px; }
  .hero h1 { font-size: 58px; }
  .hero-visual { width: 85%; }
  .section-space { padding-block: 75px; }
  .section-heading { align-items: flex-start; flex-direction: column; gap: 19px; margin-bottom: 30px; }
  .section-heading > p br { display: none; }
  .course-grid { grid-template-columns: 1fr; gap: 22px; }
  .course-card { position: relative; min-height: 276px; display: grid; grid-template-columns: 1fr 1fr; }
  .course-copy { padding: 28px 28px 0; grid-column: 1; }
  .course-copy h3 { font-size: 24px; }
  .course-copy > p:last-child, .course-kicker, .course-tags { min-height: 0; }
  .course-kicker { font-size: 14px; line-height: 1.5; }
  .course-art { grid-column: 2; grid-row: 1 / span 2; height: 245px; align-self: center; }
  .course-bottom { grid-column: 1; padding: 20px 28px 24px; }
  .course-tags { margin-bottom: 7px; }
  .course-card:has(details[open]) .course-art { align-self: start; }
  .learning-steps h3 { font-size: 18px; }
  .learning-steps p br { display: none; }
  .step-english { font-size: 39px; }
  .learning-steps li + li { padding-left: 20px; }
  .project-grid { gap: 20px; grid-template-columns: 1fr 1fr; }
  .project-art { height: 320px; }
  .habit-card { transform: rotate(-7deg) translateX(-4px); width: 235px; }
  .floating-note { display: none; }
  .project-copy { padding: 23px; }
  .project h3 { font-size: 21px; }
  .world-title { left: 24px; }
  .campus-figure { margin-inline: 16px; }
  .campus-figure img { aspect-ratio: 1.8; }
  .campus-features { grid-template-columns: 1fr 1fr; gap: 22px; }
  .campus-features > a { grid-column: 1 / -1; }
  .campus-features h3 { font-size: 21px; }
  .experience-panel { grid-template-columns: 1fr; padding: 40px; }
  .experience-intro { text-align: center; }
  .experience-intro h2 { font-size: 36px; }
  .experience-label { margin-top: 25px; }
  .experience-picker { max-width: 460px; width: 100%; margin-inline: auto; }
  .experience-result { min-height: 0; }
  .session-flow { justify-content: space-between; }
}
@media (max-width: 620px) {
  html { scroll-padding-top: 82px; }
  .container { width: calc(100% - 44px); }
  .nav-shell { width: calc(100% - 40px); min-height: 65px; column-gap: 10px; }
  .brand { font-size: 24px; gap: 7px; }
  .brand-symbol { width: 26px; height: 26px; }
  .announcement { flex-wrap: wrap; gap: 2px 10px; padding: 11px 19px; font-size: 14px; }
  .hero { padding-top: 39px; }
  .hero-copy { padding-inline: 20px; }
  .hero .eyebrow { font-size: 14px; letter-spacing: .085em; margin-bottom: 15px; }
  .hero h1 { font-size: clamp(39px, 10.7vw, 61px); line-height: 1.24; letter-spacing: -.075em; }
  .hero-description { font-size: 16px; margin-top: 22px; letter-spacing: -.03em; line-height: 1.9; }
  .hero-actions { gap: 23px; margin-top: 23px; }
  .hero-actions .button { padding: 11px 18px; font-size: 14px; }
  .hero-actions .text-link { font-size: 14px; gap: 7px; }
  .hero-visual { width: 100%; margin-top: 24px; padding: 0 6px 30px; }
  .hero-visual figcaption { font-size: 14px; letter-spacing: .13em; margin-top: -3px; }
  .section-space { padding-block: 68px; }
  .eyebrow { font-size: 14px; letter-spacing: .09em; margin-bottom: 13px; }
  h2 { font-size: 32px; line-height: 1.45; }
  .section-heading { gap: 15px; margin-bottom: 29px; }
  .section-heading > p { font-size: 16px; line-height: 1.9; }
  .course-card { display: block; }
  .course-copy { padding: 28px 25px 0; }
  .course-copy h3 { font-size: 26px; margin-top: 9px; }
  .course-kicker { letter-spacing: 0; }
  .course-art { margin-top: 13px; height: 245px; }
  .course-bottom { padding: 0 25px 24px; }
  .course-tags { margin-bottom: 16px; font-size: 14px; }
  .section-note { line-height: 1.8; margin-top: 19px; }
  .code-window { max-width: 340px; width: 90%; }
  .code-orb { right: 23px; bottom: 16px; }
  .learning h2 { font-size: 30px; line-height: 1.55; }
  .learning-intro { gap: 22px; }
  .learning-intro > p { font-size: 16px; }
  .learning-intro > p br:first-child { display: initial; }
  .learning-steps { display: block; margin: 36px 0 27px; }
  .learning-steps li { display: flex; gap: 22px; padding: 27px 0 28px; }
  .learning-steps li + li { border-left: 0; padding-left: 0; }
  .step-number { padding-top: 3px; }
  .step-english { font-size: 38px; margin: 0 0 19px; }
  .learning-steps h3 { font-size: 21px; margin-bottom: 9px; }
  .learning-steps p br { display: initial; }
  .step-arrow { right: 4px; top: 22px; }
  .project-grid { grid-template-columns: 1fr; gap: 23px; }
  .project-art { height: 323px; }
  .project h3 { font-size: 22px; }
  .project-copy { padding: 24px; }
  .habit-card { transform: rotate(-7deg) translateX(-18px); }
  .floating-note { display: block; left: 51%; top: 151px; padding: 13px; font-size: 14px; }
  .campus { padding-top: 0; }
  .campus-heading { padding-bottom: 32px; }
  .campus-heading h2 { font-size: 32px; }
  .campus-heading > p:last-child { font-size: 16px; margin-top: 18px; }
  .campus-figure { margin-inline: 12px; border-radius: 19px; }
  .campus-figure img { aspect-ratio: .98; object-position: 57% center; }
  .campus-figure figcaption { position: static; color: var(--muted); font-size: 14px; text-align: center; padding: 10px 8px 0; background: white; line-height: 1.7; }
  .campus-features { grid-template-columns: 1fr; gap: 29px; padding-top: 30px; }
  .campus-features > div { padding-bottom: 27px; border-bottom: 1px solid var(--line); }
  .campus-features h3 { font-size: 23px; margin-top: 8px; }
  .campus-features p { font-size: 16px; }
  .experience { padding-top: 64px; padding-bottom: 55px; }
  .experience-panel { width: calc(100% - 24px); padding: 36px 22px; border-radius: 24px; gap: 29px; }
  .experience-intro h2 { font-size: 29px; line-height: 1.5; letter-spacing: -.06em; }
  .experience-intro > p:not(.eyebrow) { margin-top: 18px; font-size: 16px; }
  .experience-label { font-size: 14px; letter-spacing: .02em; margin-top: 24px; }
  .experience-result { padding: 25px 22px; }
  .experience-result h3 { font-size: 26px; }
  .session-flow { gap: 10px; }
  .session-flow li { font-size: 14px; letter-spacing: -.025em; }
  .demo-notice { font-size: 14px; margin-inline: 3px; }
  .site-footer { padding-top: 31px; }
  .footer-top { flex-wrap: wrap; gap: 17px; padding-bottom: 26px; }
  .footer-top > p { flex: 1 0 100%; order: 2; }
  .back-top { font-size: 14px; }
  .footer-bottom { padding-top: 24px; gap: 19px; }
  .copyright { white-space: normal; }
}
@media (max-width: 360px) {
  .hero-copy { padding-inline: 14px; }
  .hero-actions { gap: 15px; }
  .hero .eyebrow { letter-spacing: .03em; }
  .hero h1 { font-size: 37px; }
  h2, .campus-heading h2 { font-size: 29px; }
  .learning h2 { font-size: 27px; }
  .course-copy, .course-bottom { padding-inline: 21px; }
  .course-copy h3 { font-size: 23px; }
  .course-kicker { font-size: 14px; }
  .course-tags { letter-spacing: -.045em; }
  .experience-panel { padding-inline: 17px; }
  .experience-intro h2 { font-size: 26px; }
  .experience-intro .eyebrow { letter-spacing: .035em; }
  .experience-options label > span { padding-inline: 5px; }
  .experience-result { padding-inline: 17px; }
  .experience-result h3 { font-size: 24px; }
  .session-flow { flex-wrap: wrap; gap: 10px 14px; }
  .floating-note { left: 44%; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}
@media print {
  .site-header { position: static; }
  .menu-toggle, .announcement, .hero-actions, .back-top { display: none !important; }
  .section-space { padding-block: 36px; }
  .learning { background: white; color: #202124; }
  .learning h2 span, .learning .eyebrow, .learning-steps p { color: #434343; }
}