/* Design tokens are shared by every section and can be reused in React / Fluent UI. */
:root {
  color-scheme: light;
  --page: #f7f9f6;
  --paper: #fff;
  --ink: #202d27;
  --muted: #707970;
  --green: #265345;
  --green-hover: #193e32;
  --lime: #d6f5a1;
  --line: #e1e6de;
  --font: "Inter", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  --radius: 16px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 110px; }
body { margin: 0; background: var(--page); color: var(--ink); font: 14px/1.7 var(--font); -webkit-font-smoothing: antialiased; }
body.dialog-open { overflow: hidden; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
button { color: inherit; }
h1, h2, h3, h4, p { margin: 0; }
button, a { touch-action: manipulation; }
button:focus-visible, a:focus-visible { outline: 3px solid #65965d; outline-offset: 5px; }
::selection { background: var(--lime); color: var(--green); }
[hidden] { display: none !important; }
.container { width: min(1184px, calc(100% - 96px)); margin-inline: auto; }
.icon { width: 21px; height: 21px; flex-shrink: 0; fill: none; stroke: currentColor; stroke-width: 1.65; stroke-linecap: round; stroke-linejoin: round; }
.icon-library { position: absolute; width: 0; height: 0; overflow: hidden; }
.mono { font-family: var(--mono); }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip-link { position: fixed; top: 12px; left: 12px; z-index: 100; padding: 10px 20px; background: var(--green); color: white; transform: translateY(-160%); border-radius: 8px; }
.skip-link:focus { transform: translateY(0); }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 18px; min-height: 49px; padding: 13px 23px; border: 1px solid transparent; border-radius: 8px; background: var(--green); color: white; font-weight: 600; font-size: 13px; transition: background .2s, transform .2s, box-shadow .2s; }
.button:hover { background: var(--green-hover); transform: translateY(-2px); box-shadow: 0 5px 15px #26534516; }
.button-small { min-height: 41px; padding: 9px 17px; gap: 16px; font-size: 12px; }
.text-link { display: inline-flex; align-items: center; gap: 10px; border: 0; padding: 0; background: none; font-size: 13px; font-weight: 600; }
.text-link:hover, .back-top:hover { color: var(--green); }
.text-link .icon, .card-link .icon { transition: transform .2s; }
.text-link:hover .icon, .card-link:hover .icon { transform: translateX(3px); }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; font: 11px/1.6 var(--mono); letter-spacing: 1.5px; color: var(--green); }
.status-dot { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: #739e53; flex-shrink: 0; }

/* Navigation */
.site-header { position: sticky; top: 0; z-index: 20; background: #f7f9f6ef; border-bottom: 1px solid var(--line); backdrop-filter: blur(16px); }
.header-inner { min-height: 88px; display: flex; justify-content: space-between; align-items: center; gap: 25px; }
.brand { display: inline-flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand-mark { width: 42px; height: 42px; display: flex; justify-content: center; align-items: center; border-radius: 11px; color: var(--lime); background: var(--green); font: 700 24px/1 var(--mono); letter-spacing: -2px; padding-right: 3px; }
.brand-mark span { font-size: 17px; margin-top: 1px; }
.brand-name { font-size: 18px; font-weight: 750; line-height: 1.5; letter-spacing: .3px; }
.brand-name small { display: block; color: var(--muted); font: 8px/1.5 var(--mono); letter-spacing: 1.1px; }
.primary-nav { display: flex; gap: 30px; align-items: center; }
.nav-link { position: relative; font-size: 13px; color: #626c64; padding: 32px 0; transition: color .2s; }
.nav-link:hover, .nav-link.is-active { color: var(--green); }
.nav-link.is-active { font-weight: 650; }
.nav-link.is-active::after { content: ""; position: absolute; bottom: 20px; left: 50%; width: 4px; height: 4px; border-radius: 50%; background: var(--green); }
.menu-toggle { display: none; }

/* Hero and the illustrative code playground */
.hero { display: grid; grid-template-columns: 1fr 1.08fr; gap: 60px; align-items: center; padding-block: 87px 89px; }
.hero-copy { position: relative; z-index: 1; }
.hero-copy > .eyebrow { font-size: 10px; margin-bottom: 23px; }
.hero-copy > .eyebrow .status-dot { box-shadow: 0 0 0 4px #e6eddc; margin-right: 3px; }
h1 { font-size: clamp(40px, 4.1vw, 58px); line-height: 1.35; letter-spacing: -2.4px; font-weight: 800; }
.hero-highlight { position: relative; color: var(--green); display: inline-block; }
.hero-highlight svg { position: absolute; width: 100%; height: 14px; bottom: -3px; left: 0; fill: none; stroke: #b7d68e; stroke-width: 5; stroke-linecap: round; z-index: -1; }
.hero-description { margin-top: 26px; color: var(--muted); font-size: 14px; line-height: 2; letter-spacing: .4px; }
.hero-actions { display: flex; align-items: center; gap: 27px; margin-top: 30px; }
.hero-note { display: flex; align-items: center; gap: 10px; margin-top: 27px; font-size: 11px; color: #7c847b; }
.hero-note strong { font-family: var(--mono); font-size: 10px; font-weight: 400; color: #526b52; }
.mini-code { display: grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; border: 1px solid #d8e1d1; background: #eef3e7; font: 11px var(--mono); color: var(--green); }
.hero-visual { position: relative; min-width: 0; padding-block: 24px; }
.hero-visual::before { content: ""; position: absolute; inset: -46px -26px; z-index: -1; background-image: radial-gradient(#9faf913d 1px, transparent 1px); background-size: 18px 18px; mask-image: radial-gradient(ellipse, black 30%, transparent 70%); }
.code-window { background: #202c28; border: 1px solid #39463e; border-radius: 13px; color: #c8d5cb; overflow: hidden; box-shadow: 0 22px 50px #203f231b, 0 3px 7px #243b2212; transform: rotate(1deg); }
.window-bar { height: 45px; display: flex; align-items: center; justify-content: space-between; padding: 0 18px; border-bottom: 1px solid #39453e; background: #29362f; font: 10px var(--mono); color: #acb8ae; }
.window-dots { display: flex; gap: 6px; }
.window-dots i { width: 8px; height: 8px; background: #ce7e70; border-radius: 50%; }
.window-dots i:nth-child(2) { background: #d4ba74; }
.window-dots i:nth-child(3) { background: #90b885; }
.window-language { font-size: 9px; border: 1px solid #53624f; border-radius: 4px; padding: 1px 6px; color: #bed09c; }
.editor-path { display: flex; align-items: center; gap: 10px; padding: 14px 20px 4px; color: #8d9c90; font: 9px var(--mono); }
.editor-path .icon { width: 13px; height: 13px; color: #a6c995; }
.editor-path strong { color: #bdcabc; font-weight: 400; }
.editor-path > span { opacity: .5; }
.code-editor { padding: 12px 14px 17px 0; overflow-x: auto; scrollbar-width: thin; scrollbar-color: #566957 transparent; }
.code-editor pre { margin: 0; counter-reset: line; font: 11px/2.1 var(--mono); }
.code-editor code { font: inherit; }
.code-line::before { counter-increment: line; content: counter(line); display: inline-block; width: 38px; margin-right: 17px; text-align: right; color: #6e8075; user-select: none; }
.syntax-purple { color: #c9afde; }
.syntax-green { color: #bfd995; }
.syntax-blue { color: #9bcacb; }
.syntax-yellow { color: #e5d1a1; }
.syntax-orange { color: #dfa777; }
.syntax-muted { color: #90a496; }
.terminal { background: #1a2520; border-top: 1px solid #354339; padding: 11px 18px 15px; }
.terminal-header { display: flex; justify-content: space-between; align-items: center; color: #a1afa3; font-size: 9px; }
.terminal-header > span { display: flex; gap: 7px; align-items: center; }
.terminal-dot { width: 6px; height: 6px; border: 1px solid #b2c59c; border-radius: 2px; }
.run-button { display: inline-flex; align-items: center; gap: 5px; border: 1px solid #4b6249; border-radius: 4px; padding: 4px 9px; color: #c5dfb0; background: #2b3b2c; font-size: 9px; }
.run-button:hover { background: #3d5139; }
.run-button:disabled { cursor: wait; opacity: .7; }
.terminal-output { white-space: pre-line; min-height: 43px; padding-top: 10px; font: 10px/1.8 var(--mono); color: #b8c7ad; }
.terminal-prompt { color: #bddc93; margin-right: 5px; }
.cursor { display: inline-block; width: 5px; height: 11px; margin-left: 5px; background: #b8d38f; vertical-align: -2px; animation: blink 1.3s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }
.editor-status { display: flex; justify-content: space-between; padding: 7px 14px; background: #2c3b30; color: #aabda4; font: 8px var(--mono); }
.editor-status .status-dot { width: 4px; height: 4px; margin-right: 4px; background: #b2d78f; }
.floating-label { position: absolute; z-index: 2; display: flex; align-items: center; gap: 9px; padding: 9px 14px; border: 1px solid #e0e7d8; border-radius: 7px; background: #fcfdf9; box-shadow: 0 4px 15px #293c2609; font-size: 10px; color: #5b6c52; }
.label-top { top: 3px; right: 19px; transform: rotate(3deg); }
.label-bottom { bottom: 4px; left: -24px; transform: rotate(-4deg); }
.sparkle { font-size: 23px; line-height: 1; color: #648341; }
.label-bottom .mono { color: #88a75c; font-size: 16px; margin-left: 10px; }
.tech-strip { display: flex; align-items: center; gap: 28px; justify-content: space-between; padding-block: 22px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.strip-label { font-size: 10px; color: var(--muted); letter-spacing: 1px; }
.tech-topics { display: flex; align-items: center; justify-content: space-between; gap: 39px; color: #758271; font: 600 12px var(--mono); letter-spacing: 1px; }
.tech-topics > span:first-child { font-size: 20px; }
.tech-topics i { font: 14px var(--mono); color: #a9b69b; }
.strip-end { font: 16px var(--mono); color: #98a58c; }

/* Learning paths */
.section { padding-block: 76px; }
.section-heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; margin-bottom: 29px; }
.section-kicker { font-size: 9px; letter-spacing: 1.7px; margin-bottom: 12px; color: #71856a; }
h2 { font-size: 29px; line-height: 1.55; font-weight: 750; letter-spacing: -1px; }
h2 > span { color: #6c7969; }
.section-aside { color: var(--muted); font-size: 11px; line-height: 1.9; }
.activity-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.activity-card { padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: #fcfdfb; transition: transform .25s, box-shadow .25s, border-color .25s; }
.activity-card:hover { transform: translateY(-5px); border-color: #bbceab; box-shadow: 0 12px 24px #243c2309; }
.card-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 25px; }
.feature-icon { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 11px; background: #edf2e7; color: #597642; }
.feature-icon .icon { width: 23px; height: 23px; }
.card-number { color: #adb6a5; font: 11px var(--mono); }
.activity-card h3 { font-size: 19px; font-weight: 650; margin-bottom: 12px; }
.activity-card > p { color: var(--muted); font-size: 12px; line-height: 1.95; min-height: 70px; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 18px; }
.tags span { border-radius: 4px; background: #f0f3eb; padding: 4px 8px; font-size: 9px; color: #708066; }
.card-link { display: flex; justify-content: space-between; align-items: center; margin-top: 24px; padding-top: 17px; border-top: 1px solid var(--line); font-size: 11px; font-weight: 600; }
.card-link .icon { width: 17px; }
.featured-card { background: #edf3e5; border-color: #dbe5ce; }
.featured-card .feature-icon { background: #dde9ce; }
.featured-card .tags span { background: #e1ead7; color: #546748; }
.featured-card .card-link { border-color: #d6e1c8; }
.community-note { display: flex; align-items: center; gap: 17px; margin-top: 21px; padding: 18px 23px; border: 1px dashed #d4dfca; border-radius: 9px; }
.community-symbol { color: #95aa80; font: 20px var(--mono); }
.community-note p { color: var(--muted); font-size: 11px; flex: 1; }
.community-note strong { color: #506347; font-weight: 500; }
.community-note .text-link { font-size: 11px; white-space: nowrap; }
.section-footnote { font-size: 10px; color: #78816f; text-align: right; margin-top: 12px; }

/* People */
.members-section { background: #f0f3ed; border-block: 1px solid #e7ebe3; }
.outline-label { display: inline-flex; align-items: center; gap: 8px; border: 1px solid #d8e1cf; border-radius: 20px; padding: 6px 12px; color: #6c7b60; font-size: 10px; white-space: nowrap; }
.outline-label .status-dot { width: 5px; height: 5px; }
.member-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin: 5px 0 24px; }
.filter-group { display: flex; flex-wrap: wrap; gap: 7px; }
.filter-button { border: 1px solid transparent; border-radius: 6px; background: transparent; color: #74806c; font-size: 11px; padding: 7px 13px; transition: background .2s, color .2s; }
.filter-button:hover { color: var(--green); background: #e7eddf; }
.filter-button.is-active { color: var(--green); background: #fff; border-color: #dbe2d4; box-shadow: 0 1px 3px #26452d08; }
.data-note { font-size: 10px; color: #77836e; }
.member-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.member-card { padding: 27px 23px 16px; background: #fbfcfa; border: 1px solid #e0e6da; border-radius: 12px; transition: border-color .2s, transform .2s; }
.member-card:hover { border-color: #b8c9aa; transform: translateY(-3px); }
.member-avatar { width: 60px; height: 60px; display: grid; place-items: center; margin-bottom: 22px; border-radius: 18px; font: 500 21px var(--mono); }
.avatar-green { color: #557346; background: #e3eccf; border: 1px solid #d3e1bc; transform: rotate(-5deg); }
.avatar-blue { color: #587d88; background: #e1edef; border: 1px solid #cfe0e4; transform: rotate(4deg); }
.avatar-peach { color: #ae8166; background: #f3e8d8; border: 1px solid #eaddc6; transform: rotate(-4deg); }
.member-role { font: 8px var(--mono); color: #7a8d6d; letter-spacing: 1.2px; }
.member-card h3 { font-size: 16px; font-weight: 650; margin-top: 6px; }
.profile-placeholder { color: #76826f; font-size: 10px; margin-top: 5px; }
.member-description { color: #7b8376; font-size: 11px; margin-top: 16px; min-height: 39px; line-height: 1.8; }
.member-bottom { margin-top: 20px; padding-top: 13px; border-top: 1px solid #e7ece1; display: flex; justify-content: space-between; align-items: center; color: #74826a; font-size: 9px; }
.member-bottom .icon { width: 16px; height: 16px; }
.member-invite { background: transparent; border-style: dashed; border-color: #cbd7bd; }
.invite-orbit { display: grid; place-items: center; width: 60px; height: 60px; border: 1px dashed #bbcba8; border-radius: 50%; margin-bottom: 22px; }
.invite-orbit span { width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid #d7e1cc; border-radius: 50%; color: #7f9667; font: 23px var(--mono); }
.member-invite > p { color: #7c8872; margin-top: 12px; font-size: 11px; line-height: 1.9; }
.member-invite .text-link { margin-top: 23px; font-size: 11px; color: var(--green); }
.member-invite .text-link .icon { width: 17px; }
.mentors-section { display: grid; grid-template-columns: .9fr 1.1fr; gap: 92px; align-items: center; padding-block: 84px; }
.mentor-intro > p:not(.eyebrow) { margin-top: 19px; max-width: 325px; color: var(--muted); font-size: 12px; line-height: 2; }
.mentor-decoration { display: block; font: 9px var(--mono); color: #829077; margin-top: 26px; }
.mentor-decoration > span { color: #a2b18d; margin-inline: 4px; }
.mentor-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 29px; position: relative; }
.mentor-profile { display: flex; align-items: center; gap: 20px; }
.mentor-avatar { height: 77px; width: 77px; border-radius: 12px; background: #eff3e9; color: #71915c; display: flex; justify-content: center; align-items: center; flex-direction: column; gap: 7px; }
.mentor-avatar .icon { width: 30px; height: 30px; }
.mentor-avatar > span { font: 7px var(--mono); letter-spacing: 1px; }
.mentor-badge { display: inline-block; color: #778567; background: #f0f4e9; border-radius: 4px; font-size: 8px; padding: 2px 7px; margin-bottom: 4px; }
.mentor-profile h3 { font-size: 20px; }
.mentor-divider { height: 1px; background: var(--line); margin: 22px 0; }
.mentor-card h4 { font-size: 13px; font-weight: 600; margin-bottom: 8px; }
.mentor-description { color: var(--muted); font-size: 11px; line-height: 1.9; }
.mentor-topics { display: flex; flex-wrap: wrap; gap: 21px; padding-top: 21px; }
.mentor-topics > span { color: #6f805f; font-size: 10px; display: flex; gap: 5px; align-items: center; }
.mentor-topics .icon { width: 13px; height: 13px; }

/* Resources and invitation */
.resources-section { padding-block: 0 70px; }
.resource-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.resource-card { display: flex; gap: 14px; align-items: flex-start; border-top: 1px solid #dce4d3; padding: 24px 0 0; transition: border-color .2s; }
.resource-card:hover { border-color: var(--green); }
.resource-logo { display: flex; justify-content: center; align-items: center; flex-direction: column; width: 45px; height: 45px; flex-shrink: 0; color: #637d58; background: #eaf0e2; border: 1px solid #dce6d2; border-radius: 10px; font-size: 12px; font-weight: 600; line-height: 1.1; }
.resource-logo > span { font-size: 8px; }
.resource-learn { background: #f0ece2; border-color: #e8e0cf; color: #978361; }
.resource-practice { background: #e5edea; border-color: #d6e2db; color: #628575; }
.resource-card > div { flex: 1; }
.resource-card h3 { display: flex; align-items: center; justify-content: space-between; gap: 8px; font-size: 13px; font-weight: 600; }
.resource-card h3 .icon { width: 16px; height: 16px; color: #869379; }
.resource-card p { margin-top: 5px; color: var(--muted); font-size: 10px; line-height: 1.9; }
.resource-card div > span { display: block; margin-top: 10px; font: 8px/1.8 var(--mono); color: #78866e; letter-spacing: .2px; }
.join-section { padding-bottom: 65px; }
.join-banner { display: flex; align-items: center; justify-content: space-between; gap: 40px; padding: 44px 53px; border-radius: 16px; background-color: #254d3e; background-image: radial-gradient(#d6f5a10e 1px, transparent 1px); background-size: 17px 17px; color: #f3f7ed; overflow: hidden; }
.join-banner .eyebrow { font-size: 9px; color: #a9c394; letter-spacing: 1.8px; }
.join-banner h2 { font-size: 30px; line-height: 1.6; margin-top: 13px; font-weight: 600; }
.join-banner p:not(.eyebrow) { margin-top: 16px; color: #bbcebd; font-size: 11px; line-height: 1.9; }
.join-action { display: flex; align-items: center; flex-direction: column; padding-right: 19px; }
.join-art { color: #6e956b; font: 70px/1 var(--mono); letter-spacing: -8px; margin-bottom: 26px; transform: rotate(-7deg); }
.join-art > span { font-size: 50px; color: #a4c98a; margin: 0 4px; }
.button-lime { background: var(--lime); color: #294a2f; padding-inline: 28px; }
.button-lime:hover { background: #e5ffbb; }
.join-caption { color: #b5c8aa; font-size: 8px; margin-top: 14px; }
.site-footer { display: flex; align-items: center; justify-content: space-between; gap: 24px; border-top: 1px solid var(--line); padding-block: 26px 32px; }
.footer-brand .brand-mark { width: 33px; height: 33px; font-size: 20px; border-radius: 9px; }
.footer-brand .brand-mark span { font-size: 13px; }
.footer-brand .brand-name { font-size: 14px; }
.footer-brand .brand-name small { font-family: var(--font); font-size: 8px; letter-spacing: 1px; margin-top: 3px; }
.site-footer > p { font-size: 9px; color: #828b7b; }
.footer-dot { margin-inline: 8px; }
.back-top { display: flex; align-items: center; gap: 17px; font-size: 10px; color: #718167; }
.back-top span { font-size: 15px; }

/* Native dialog preserves focus trapping, Escape dismissal and screen-reader semantics. */
.join-dialog { width: min(470px, calc(100% - 32px)); max-height: calc(100dvh - 40px); padding: 36px; border: 1px solid #dce5d2; border-radius: 18px; background: var(--page); color: var(--ink); overflow-y: auto; box-shadow: 0 30px 100px #132b3540; }
.join-dialog::backdrop { background: #172d25a3; backdrop-filter: blur(5px); }
.dialog-close { position: absolute; top: 13px; right: 13px; display: grid; place-items: center; width: 36px; height: 36px; border: 0; border-radius: 50%; background: #e9eee4; color: var(--green); font-size: 24px; }
.dialog-close:hover { background: #dce6d4; }
.dialog-mark { display: grid; place-items: center; width: 48px; height: 48px; border-radius: 12px; background: var(--green); color: var(--lime); font: 600 23px var(--mono); margin-bottom: 25px; }
.join-dialog .eyebrow { display: block; }
.join-dialog h2 { font-size: 29px; line-height: 1.5; }
#dialog-description { margin-top: 16px; color: var(--muted); font-size: 12px; line-height: 1.9; }
.contact-notice { padding: 17px; border: 1px solid #dce6d1; background: #eef3e7; border-radius: 9px; margin-block: 22px; }
.contact-notice strong { display: flex; align-items: center; gap: 8px; font-size: 12px; }
.contact-notice p { margin-top: 8px; font-size: 11px; color: #738268; line-height: 1.9; }
.dialog-explore { width: 100%; }
.dialog-note { margin-top: 15px; color: #7d8c72; font-size: 10px; text-align: center; }

/* Responsive layout */
@media (min-width: 1600px) {
  .hero { padding-block: 108px; }
}
@media (max-width: 1100px) {
  .container { width: calc(100% - 64px); }
  .primary-nav { gap: 20px; }
  .hero { gap: 32px; padding-block: 72px; }
  h1 { font-size: 45px; }
  .hero-actions { gap: 18px; }
  .hero-actions .button { padding-inline: 17px; }
  .code-editor pre { font-size: 9px; }
  .code-line::before { width: 25px; margin-right: 13px; }
  .tech-topics { gap: 25px; font-size: 10px; }
  .section-aside { font-size: 10px; }
  h2 { font-size: 25px; }
  .activity-card { padding: 23px; }
  .member-card { padding-inline: 18px; }
  .mentors-section { gap: 48px; }
  .resource-card { gap: 10px; }
  .join-banner { padding-inline: 40px; }
}
@media (max-width: 850px) {
  .header-inner { min-height: 75px; gap: 15px; }
  .brand-name { font-size: 16px; }
  .brand-name small { font-size: 7px; }
  .primary-nav { gap: 16px; }
  .nav-link { font-size: 11px; padding-block: 27px; }
  .header-join { padding-inline: 12px; gap: 7px; font-size: 11px; }
  .hero { gap: 25px; padding-block: 63px; }
  h1 { font-size: 36px; letter-spacing: -1.8px; }
  .hero-copy > .eyebrow { font-size: 8px; letter-spacing: .7px; }
  .hero-description { font-size: 12px; }
  .hero-actions { gap: 15px; flex-wrap: wrap; }
  .hero-actions .button { font-size: 11px; gap: 8px; min-height: 44px; }
  .hero-actions .text-link { font-size: 11px; gap: 4px; }
  .hero-note { font-size: 9px; }
  .hero-note strong { font-size: 9px; }
  .label-bottom { left: -10px; }
  .floating-label { font-size: 8px; padding: 7px 10px; }
  .code-editor pre { font-size: 9px; }
  .editor-path { padding-left: 12px; }
  .terminal { padding-inline: 12px; }
  .terminal-output { font-size: 8px; }
  .tech-strip { gap: 18px; }
  .strip-end { display: none; }
  .tech-topics { gap: 20px; }
  .section { padding-block: 58px; }
  .section-heading { align-items: flex-start; }
  .section-aside { max-width: 175px; }
  .activity-grid { gap: 13px; }
  .activity-card { padding: 20px; }
  .activity-card h3 { font-size: 17px; }
  .activity-card > p { font-size: 11px; min-height: 85px; }
  .tags { gap: 4px; }
  .tags span { padding-inline: 6px; font-size: 8px; }
  .member-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .member-card { padding: 25px; }
  .member-toolbar { align-items: flex-start; flex-direction: column; gap: 10px; }
  .mentors-section { gap: 32px; }
  .mentor-card { padding: 24px; }
  .mentor-profile { gap: 13px; }
  .mentor-avatar { width: 62px; height: 70px; }
  .mentor-topics { gap: 14px; }
  .resource-grid { gap: 16px; }
  .resource-card { display: block; }
  .resource-logo { margin-bottom: 15px; }
  .resources-section { padding-bottom: 55px; }
  .join-banner { padding: 36px; gap: 25px; }
  .join-banner h2 { font-size: 25px; }
  .join-action { padding: 0; }
  .join-action .button { padding-inline: 20px; font-size: 11px; }
}
@media (max-width: 680px) {
  html { scroll-padding-top: 89px; }
  .container { width: calc(100% - 40px); }
  .header-inner { min-height: 70px; }
  .brand-mark { width: 36px; height: 36px; border-radius: 9px; font-size: 21px; }
  .brand-mark span { font-size: 15px; }
  .brand-name { font-size: 16px; }
  .brand-name small { font-size: 6px; }
  .header-join { margin-left: auto; font-size: 11px; padding: 7px 11px; min-height: 36px; }
  .header-join .icon { width: 16px; height: 16px; }
  .menu-toggle { display: flex; justify-content: center; align-items: center; flex-direction: column; gap: 6px; width: 36px; height: 36px; padding: 0; border: 1px solid #dce3d5; background: transparent; border-radius: 7px; order: 3; }
  .menu-toggle span { width: 16px; height: 1.5px; background: var(--green); transition: transform .2s; }
  .menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.75px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.75px) rotate(-45deg); }
  .primary-nav { position: absolute; top: 70px; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; padding: 8px 20px 16px; background: #f7f9f6; border-bottom: 1px solid var(--line); box-shadow: 0 12px 20px #233e2610; }
  .primary-nav:not(.is-open) { display: none; }
  .nav-link { padding: 12px 14px; font-size: 13px; border-radius: 6px; }
  .nav-link.is-active { background: #eaf0e2; }
  .nav-link.is-active::after { left: auto; right: 15px; bottom: 21px; }
  .hero { grid-template-columns: 1fr; gap: 43px; padding-block: 49px 40px; }
  .hero-copy > .eyebrow { font-size: 9px; letter-spacing: 1px; margin-bottom: 19px; }
  h1 { font-size: clamp(36px, 9vw, 54px); line-height: 1.38; }
  .hero-description { font-size: 13px; margin-top: 23px; }
  .hero-actions { gap: 24px; margin-top: 25px; }
  .hero-actions .button { padding-inline: 20px; min-height: 47px; font-size: 12px; gap: 13px; }
  .hero-actions .text-link { font-size: 12px; gap: 6px; }
  .hero-note { margin-top: 22px; font-size: 10px; }
  .hero-visual { width: calc(100% - 8px); margin-inline: auto; padding-block: 22px; }
  .hero-visual::before { inset: -30px -12px; }
  .code-window { transform: rotate(.5deg); }
  .window-bar { height: 42px; }
  .editor-path { font-size: 9px; padding-left: 14px; }
  .code-editor { padding-top: 14px; }
  .code-editor pre { font-size: clamp(8px, 2.35vw, 12px); }
  .code-line::before { width: 24px; margin-right: 12px; }
  .terminal { padding-inline: 15px; }
  .terminal-output { font-size: 10px; }
  .label-top { top: 1px; right: 12px; font-size: 9px; }
  .label-bottom { left: -7px; bottom: 3px; font-size: 9px; }
  .tech-strip { flex-direction: column; gap: 14px; padding-block: 19px; }
  .strip-label { font-size: 9px; }
  .tech-topics { width: 100%; gap: 9px; font-size: 8px; letter-spacing: .2px; }
  .tech-topics > span:first-child { font-size: 15px; }
  .tech-topics i { font-size: 11px; }
  .section { padding-block: 48px; }
  .section-heading { flex-direction: column; gap: 14px; margin-bottom: 25px; }
  .section-kicker { font-size: 8px; margin-bottom: 10px; }
  h2 { font-size: clamp(21px, 5.1vw, 29px); letter-spacing: -.5px; }
  .section-aside { font-size: 11px; max-width: none; }
  .section-aside br { display: none; }
  .activity-grid { grid-template-columns: 1fr; gap: 15px; }
  .activity-card { padding: 25px; }
  .card-top { margin-bottom: 20px; }
  .activity-card h3 { font-size: 19px; }
  .activity-card > p { min-height: auto; font-size: 12px; }
  .tags span { font-size: 9px; padding: 4px 8px; }
  .card-link { font-size: 12px; }
  .community-note { padding: 17px; align-items: flex-start; gap: 12px; flex-wrap: wrap; }
  .community-note p { flex-basis: calc(100% - 40px); font-size: 11px; }
  .community-note .text-link { margin-left: 35px; }
  .section-footnote { font-size: 9px; text-align: left; }
  .outline-label { font-size: 9px; }
  .member-toolbar { gap: 13px; margin-bottom: 20px; }
  .filter-group { width: 100%; gap: 4px; }
  .filter-button { padding: 7px 10px; font-size: 10px; }
  .data-note { font-size: 9px; }
  .member-grid { gap: 12px; }
  .member-card { padding: 20px 16px 15px; }
  .member-avatar, .invite-orbit { width: 50px; height: 50px; margin-bottom: 18px; border-radius: 15px; }
  .invite-orbit { border-radius: 50%; }
  .invite-orbit span { width: 35px; height: 35px; }
  .member-role { font-size: 7px; letter-spacing: .4px; }
  .member-card h3 { font-size: 14px; }
  .member-description { font-size: 10px; min-height: 54px; }
  .member-bottom { font-size: 8px; margin-top: 13px; }
  .member-invite .text-link { margin-top: 31px; }
  .mentors-section { grid-template-columns: 1fr; gap: 29px; }
  .mentor-intro h2 br { display: none; }
  .mentor-intro > p:not(.eyebrow) { max-width: none; font-size: 12px; }
  .mentor-decoration { margin-top: 18px; }
  .mentor-card { padding: 25px; }
  .mentor-profile { gap: 17px; }
  .mentor-avatar { width: 70px; height: 74px; }
  .resources-section { padding-bottom: 44px; }
  .resource-grid { grid-template-columns: 1fr; gap: 21px; }
  .resource-card { display: flex; gap: 16px; padding-top: 20px; }
  .resource-logo { margin-bottom: 0; width: 48px; height: 48px; }
  .resource-card h3 { font-size: 14px; }
  .resource-card p { font-size: 11px; }
  .resource-card div > span { margin-top: 8px; }
  .join-section { padding-bottom: 38px; }
  .join-banner { padding: 29px 25px; flex-direction: column; align-items: flex-start; gap: 26px; }
  .join-banner h2 { font-size: 26px; }
  .join-banner .eyebrow { font-size: 8px; letter-spacing: 1px; }
  .join-banner p:not(.eyebrow) { font-size: 11px; }
  .join-action { position: relative; align-items: flex-start; width: 100%; }
  .join-art { position: absolute; right: -4px; bottom: 9px; font-size: 48px; margin: 0; letter-spacing: -6px; }
  .join-art > span { font-size: 30px; }
  .join-action .button { font-size: 12px; padding-inline: 20px; }
  .join-caption { font-size: 8px; margin-top: 12px; }
  .site-footer { display: grid; grid-template-columns: 1fr auto; gap: 23px 15px; padding-block: 24px; }
  .site-footer > p { grid-row: 2; grid-column: 1 / -1; font-size: 9px; }
  .back-top { grid-column: 2; grid-row: 1; }
  .join-dialog { padding: 29px; }
}
@media (max-width: 360px) {
  .container { width: calc(100% - 32px); }
  .header-inner { gap: 8px; }
  .brand { gap: 7px; }
  .brand-name { font-size: 14px; }
  .brand-name small { font-size: 5px; }
  .header-join { font-size: 10px; padding-inline: 9px; }
  .header-join .icon { display: none; }
  .filter-button { padding-inline: 8px; }
  .join-art { display: none; }
  .member-card { padding-inline: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}