:root {
  color-scheme: dark;
  --ink: #f7f5ff;
  --muted: #aaa4c5;
  --canvas: #0d0a18;
  --surface: #151126;
  --surface-raised: #20183a;
  --surface-soft: #2a204a;
  --line: #413365;
  --line-bright: #6653a0;
  --brand: #6d8bff;
  --brand-strong: #4f70ff;
  --cyan: #28d5dc;
  --green: #44df8d;
  --gold: #ffca4b;
  --danger: #ff8090;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shell: min(1180px, calc(100% - 32px));
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 280px; background: var(--canvas); color: var(--ink); line-height: 1.6; }
button, input, textarea { font: inherit; }
a { color: inherit; text-decoration: none; }
img, video { display: block; max-width: 100%; }
.shell { width: var(--shell); margin-inline: auto; }
.skip-link { position: fixed; z-index: 100; top: 8px; left: 8px; transform: translateY(-160%); padding: 8px 12px; background: white; color: black; }
.skip-link:focus { transform: translateY(0); }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

.site-header { position: sticky; z-index: 20; top: 0; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; min-height: 72px; padding: 8px max(16px, calc((100vw - 1180px) / 2)); border-bottom: 1px solid rgba(109, 139, 255, .22); background: rgba(13, 10, 24, .88); backdrop-filter: blur(18px); }
.brand { display: inline-flex; align-items: center; gap: 10px; justify-self: start; }
.brand img { width: 52px; height: 52px; object-fit: contain; }
.brand span { display: flex; align-items: baseline; gap: 8px; }
.brand strong { font-size: 20px; letter-spacing: .06em; }
.brand small { color: var(--muted); font-size: 13px; }
nav { display: flex; gap: 24px; color: var(--muted); font-size: 14px; }
nav a:hover, nav a:focus-visible { color: var(--ink); }
.site-header__actions { display: flex; align-items: center; justify-self: end; gap: 8px; }

.button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; gap: 8px; padding: 10px 20px; border: 1px solid transparent; border-radius: var(--radius-sm); cursor: pointer; font-weight: 750; transition: transform .18s ease, border-color .18s ease, background .18s ease; }
.button:hover { transform: translateY(-1px); }
.button:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, a:focus-visible { outline: 3px solid rgba(40, 213, 220, .48); outline-offset: 2px; }
.button:disabled { cursor: wait; opacity: .68; transform: none; }
.button--primary { color: #071418; background: linear-gradient(100deg, var(--green), var(--cyan)); }
.button--ghost { color: var(--ink); border-color: var(--line-bright); background: var(--surface-soft); }
.button--outline { border-color: var(--line-bright); background: transparent; }
.button--small { min-height: 40px; padding: 7px 14px; font-size: 14px; }
.button--full { width: 100%; }

.hero { display: grid; grid-template-columns: 1.05fr .95fr; gap: 64px; align-items: center; min-height: 680px; padding-block: 80px; }
.status-line { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 32px; }
.status-pill, .version-pill, .online, .verified { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--line); border-radius: 999px; padding: 5px 10px; font-size: 12px; font-weight: 700; letter-spacing: .03em; }
.status-pill { color: var(--green); background: rgba(68, 223, 141, .08); }
.status-pill i, .online i { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 12px var(--green); }
.version-pill { color: var(--gold); background: rgba(255, 202, 75, .06); }
.eyebrow { margin: 0 0 8px; color: var(--cyan); font-size: 12px; font-weight: 850; letter-spacing: .18em; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 24px; font-size: clamp(48px, 7vw, 84px); line-height: 1.05; letter-spacing: -.045em; }
h1 span { color: var(--brand); }
.hero__summary { max-width: 620px; color: #c5bfd8; font-size: clamp(16px, 2vw, 20px); }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-block: 28px 20px; }
.trust-list { display: flex; flex-wrap: wrap; gap: 8px 20px; margin: 0; padding: 0; color: var(--muted); font-size: 12px; list-style: none; }
.trust-list li::before { content: "✓"; margin-right: 6px; color: var(--green); }
.hero__mark { position: relative; isolation: isolate; min-height: 500px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-lg); background: #f9faff; color: #141025; }
.hero__mark::after { position: absolute; inset: auto 0 0; height: 26%; background: linear-gradient(90deg, rgba(37, 53, 167, .07), transparent); content: ""; }
.hero__mark img { position: absolute; z-index: 2; inset: 7% 4% auto; width: 92%; height: 70%; object-fit: contain; }
.hero__mark p { position: absolute; z-index: 3; right: 24px; bottom: 20px; display: flex; flex-direction: column; align-items: flex-end; margin: 0; }
.hero__mark strong { font-size: 22px; letter-spacing: .08em; }
.hero__mark span { color: #635e75; font-size: 12px; }
.hero__grid { position: absolute; inset: 0; opacity: .35; background-image: linear-gradient(rgba(79,112,255,.1) 1px, transparent 1px), linear-gradient(90deg, rgba(79,112,255,.1) 1px, transparent 1px); background-size: 32px 32px; }

.section { padding-block: 88px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin-bottom: 28px; }
.section-heading h2, .demo-copy h2, .boundary-card h2 { margin: 0; font-size: clamp(30px, 4vw, 48px); line-height: 1.2; letter-spacing: -.025em; }
.section-heading--wide > p { max-width: 420px; margin: 0; color: var(--muted); text-align: right; }
.online { color: var(--green); }
.verified { color: var(--gold); }

.overview-layout { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(260px, .6fr); gap: 20px; }
.overview-main, .definition-card { border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }
.overview-main { padding: 32px; }
.overview-lead { max-width: 840px; color: #d1cce2; font-size: clamp(17px, 2vw, 21px); }
.agent-flow { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; gap: 12px; align-items: center; margin-block: 32px; }
.agent-flow > div { min-height: 140px; padding: 20px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface-raised); }
.agent-flow span, .feature-number { display: block; margin-bottom: 22px; color: var(--cyan); font-size: 12px; font-weight: 850; letter-spacing: .12em; }
.agent-flow strong { display: block; }
.agent-flow small { color: var(--muted); }
.agent-flow i { color: var(--brand); font-size: 24px; font-style: normal; }
.truth-note { margin: 0; padding: 14px 16px; border-left: 3px solid var(--gold); background: rgba(255,202,75,.06); color: var(--muted); font-size: 13px; }
.truth-note strong { color: var(--ink); }
.definition-card { display: flex; flex-direction: column; padding: 28px; }
.definition-card img { width: min(200px, 64%); margin: 0 auto 24px; }
.definition-card dl { margin: auto 0 0; }
.definition-card dl div { padding-block: 12px; border-top: 1px solid var(--line); }
.definition-card dt { color: var(--muted); font-size: 11px; }
.definition-card dd { margin: 2px 0 0; font-weight: 750; }

.section--features { border-block: 1px solid rgba(109,139,255,.18); background: #121020; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.feature-grid article { min-height: 260px; padding: 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(32,24,58,.48); }
.feature-grid article:nth-child(even) { background: rgba(42,32,74,.52); }
.feature-grid h3 { margin-bottom: 10px; font-size: 21px; }
.feature-grid article > p:last-child { color: var(--muted); }
.feature-platform { margin-bottom: 8px; color: var(--gold); font-size: 10px; font-weight: 850; letter-spacing: .14em; }
.feature-number { margin-bottom: 34px; }
.use-cases { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 24px; }
.use-cases strong { margin-right: 10px; }
.use-cases span { padding: 6px 10px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font-size: 12px; }
.command-center { display: grid; grid-template-columns: minmax(280px, .72fr) minmax(0, 1.28fr); min-height: 620px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); }
.key-panel, .chat-panel { padding: 28px; }
.key-panel { border-right: 1px solid var(--line); background: #17122b; }
.panel-heading { display: flex; align-items: center; gap: 12px; margin-bottom: 28px; }
.panel-index { display: grid; width: 42px; height: 42px; place-items: center; border: 1px solid var(--line-bright); border-radius: 50%; color: var(--cyan); font-weight: 800; }
.panel-heading h3 { margin: 0; font-size: 18px; }
.panel-heading p { margin: 0; color: var(--muted); font-size: 13px; }
.key-panel label { display: block; margin-bottom: 8px; color: #d6d1e5; font-size: 13px; font-weight: 700; }
.key-field { display: grid; grid-template-columns: 1fr auto; overflow: hidden; border: 1px solid var(--line-bright); border-radius: var(--radius-sm); background: #0d0a18; }
.key-field:focus-within { border-color: var(--cyan); }
.key-field input { width: 100%; min-width: 0; padding: 13px 14px; border: 0; outline: 0; color: var(--ink); background: transparent; }
.key-field button { padding-inline: 14px; border: 0; color: var(--brand); background: transparent; cursor: pointer; font-weight: 700; }
.secure-note { margin: 10px 0; color: var(--green); font-size: 12px; }
.text-link { display: inline-block; color: var(--brand); font-size: 13px; text-decoration: underline; text-underline-offset: 4px; }
.boundary-mini { margin-top: 36px; padding: 16px; border-left: 3px solid var(--gold); background: rgba(255, 202, 75, .06); }
.boundary-mini p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
.chat-panel { display: grid; grid-template-rows: auto 1fr auto auto; min-height: 620px; background: var(--surface-raised); }
.chat-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.chat-toolbar > div { display: grid; grid-template-columns: auto 1fr; column-gap: 10px; align-items: center; }
.bot-dot { grid-row: 1 / 3; display: grid; width: 40px; height: 40px; place-items: center; border-radius: 50%; background: white; }
.bot-dot img { width: 34px; height: 34px; object-fit: contain; }
.chat-toolbar small { color: var(--muted); }
.quiet-button { border: 0; color: var(--muted); background: transparent; cursor: pointer; }
.chat-log { max-height: 410px; min-height: 280px; overflow-y: auto; padding: 24px 4px; scrollbar-color: var(--line-bright) transparent; }
.message { width: fit-content; max-width: min(84%, 680px); margin-bottom: 14px; padding: 12px 14px; border: 1px solid var(--line); border-radius: 3px 14px 14px; background: var(--surface-soft); }
.message--user { margin-left: auto; border-color: #637ade; border-radius: 14px 3px 14px 14px; background: #334687; }
.message--system { border-color: rgba(255,128,144,.55); background: rgba(255,128,144,.08); }
.message--pending { opacity: .68; }
.message__label { display: block; margin-bottom: 4px; color: var(--cyan); font-size: 11px; font-weight: 850; letter-spacing: .08em; }
.message p { margin: 0; white-space: pre-wrap; overflow-wrap: anywhere; }
.chat-form { display: grid; grid-template-columns: 1fr auto; gap: 10px; padding-top: 18px; border-top: 1px solid var(--line); }
.chat-form textarea { min-height: 86px; resize: vertical; padding: 12px 14px; border: 1px solid var(--line-bright); border-radius: var(--radius-sm); outline: 0; color: var(--ink); background: #0e0b1b; }
.chat-form textarea:focus { border-color: var(--cyan); }
.chat-form .button { align-self: stretch; }
.model-note { margin: 10px 0 0; color: var(--muted); font-size: 11px; text-align: center; }

.section--demo { overflow: hidden; border-block: 1px solid rgba(109,139,255,.18); background: #121020; }
.demo-layout { display: grid; grid-template-columns: 1fr minmax(300px, 480px); gap: 72px; align-items: center; }
.demo-copy > p:not(.eyebrow) { max-width: 570px; margin-top: 20px; color: var(--muted); font-size: 17px; }
.demo-steps { margin: 32px 0 0; padding: 0; list-style: none; }
.demo-steps li { display: flex; align-items: center; gap: 16px; padding-block: 16px; border-top: 1px solid var(--line); }
.demo-steps li > span { color: var(--cyan); font-weight: 850; }
.demo-steps div { display: flex; flex-direction: column; }
.demo-steps small { color: var(--muted); }
.phone-video { max-width: 480px; margin-inline: auto; overflow: hidden; border: 1px solid var(--line-bright); border-radius: 28px; background: #050408; box-shadow: 0 26px 70px rgba(0,0,0,.4); }
.phone-video__bar { display: flex; justify-content: space-between; padding: 12px 18px; color: var(--muted); background: var(--surface-raised); font-size: 12px; }
.phone-video video { width: 100%; max-height: 720px; background: black; aspect-ratio: 1080 / 2338; }
.video-help { margin: 0; padding: 12px 18px 14px; color: var(--muted); background: var(--surface-raised); font-size: 12px; text-align: center; }
.video-help a { color: var(--cyan); font-weight: 750; }

.install-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.install-card { padding: 32px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }
.install-card--android { border-color: rgba(40,213,220,.48); background: linear-gradient(145deg, rgba(40,213,220,.05), var(--surface) 42%); }
.platform-icon { display: grid; width: 52px; height: 52px; place-items: center; margin-bottom: 24px; border: 1px solid var(--line-bright); border-radius: 50%; color: var(--green); font-size: 21px; font-weight: 900; }
.platform-icon--apple { color: var(--ink); }
.install-card h3 { margin-bottom: 10px; font-size: 25px; }
.install-card > p:not(.eyebrow) { color: var(--muted); }
.install-card dl { display: grid; grid-template-columns: repeat(3, 1fr); margin: 24px 0; padding-block: 14px; border-block: 1px solid var(--line); }
.install-card dl div { display: flex; flex-direction: column; }
.install-card dt, .install-card > small { color: var(--muted); font-size: 11px; }
.install-card dd { margin: 0; font-weight: 800; }
.install-card > small { display: block; margin-top: 12px; }
.ios-steps { display: grid; gap: 10px; margin: 24px 0; padding: 0; list-style: none; }
.ios-steps li { display: flex; align-items: center; gap: 10px; }
.ios-steps span, .dialog-steps span { display: grid; flex: 0 0 28px; width: 28px; height: 28px; place-items: center; border: 1px solid var(--line-bright); border-radius: 50%; color: var(--brand); font-size: 12px; font-weight: 850; }
.section--guide { border-block: 1px solid rgba(109,139,255,.18); background: #121020; }
.guide-steps { display: grid; grid-template-columns: repeat(5, 1fr); margin: 0; padding: 0; border-top: 1px solid var(--line); border-left: 1px solid var(--line); list-style: none; }
.guide-steps > li { min-height: 290px; padding: 24px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.guide-steps > li > span { display: grid; width: 38px; height: 38px; place-items: center; margin-bottom: 36px; border: 1px solid var(--line-bright); border-radius: 50%; color: var(--cyan); font-weight: 850; }
.guide-steps h3 { margin-bottom: 8px; font-size: 18px; }
.guide-steps div > p:last-child { color: var(--muted); font-size: 13px; }
.prompt-examples { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 24px; }
.prompt-examples p { display: flex; flex-direction: column; gap: 6px; margin: 0; padding: 16px; border: 1px dashed var(--line-bright); border-radius: var(--radius-sm); color: var(--muted); font-size: 13px; }
.prompt-examples strong { color: var(--ink); }
.boundary-card { padding: 32px; border: 1px solid rgba(255,202,75,.5); border-radius: var(--radius-md); background: rgba(255,202,75,.045); }
.boundary-card__title { display: flex; align-items: center; gap: 16px; }
.boundary-card__title > span { display: grid; width: 48px; height: 48px; place-items: center; border: 1px solid var(--gold); border-radius: 50%; color: var(--gold); font-size: 24px; font-weight: 900; }
.boundary-columns { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; margin-top: 28px; }
.boundary-columns div { padding-top: 18px; border-top: 1px solid var(--line); }
.boundary-columns h3 { margin-bottom: 8px; }
.boundary-columns p { margin: 0; color: var(--muted); }
.boundary-columns strong { color: var(--ink); }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { position: relative; padding: 22px 52px 22px 0; cursor: pointer; font-size: 17px; font-weight: 750; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { position: absolute; right: 8px; color: var(--brand); content: "+"; font-size: 26px; font-weight: 400; transition: transform .18s ease; }
.faq-list details[open] summary::after { transform: rotate(45deg); }
.faq-list details p { max-width: 900px; margin: -6px 0 22px; color: var(--muted); }

footer { padding-block: 28px; border-top: 1px solid var(--line); color: var(--muted); }
footer .shell { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand--footer img { width: 42px; height: 42px; }
footer p { margin: 0; font-size: 12px; }

dialog { width: min(520px, calc(100% - 24px)); max-height: calc(100svh - 24px); overflow-y: auto; padding: 0; border: 1px solid var(--line-bright); border-radius: var(--radius-md); color: var(--ink); background: var(--surface-raised); }
dialog::backdrop { background: rgba(3,2,8,.78); backdrop-filter: blur(8px); }
dialog form { position: relative; padding: 28px; }
.dialog-close { position: absolute; top: 12px; right: 12px; width: 40px; height: 40px; border: 0; color: var(--muted); background: transparent; cursor: pointer; font-size: 28px; }
.dialog-steps { display: grid; gap: 18px; margin: 24px 0; padding: 0; list-style: none; }
.dialog-steps li { display: flex; align-items: flex-start; gap: 12px; }
.dialog-steps p { margin: 2px 0 0; color: var(--muted); }

.member-dialog__panel { position: relative; padding: 28px; }
.member-dialog__panel h2 { margin-bottom: 8px; font-size: 30px; }
.member-dialog__intro, .member-dialog__note { color: var(--muted); }
.member-dialog__note { margin: 14px 0 0; font-size: 12px; text-align: center; }
.member-dialog__panel .member-login-form, .member-dialog__panel .member-password-form { position: static; display: grid; gap: 8px; }
.member-dialog__panel .member-login-form { padding: 16px 0 0; }
.member-login-form label, .member-password-form label { margin-top: 6px; color: #d6d1e5; font-size: 13px; font-weight: 750; }
.member-login-form input, .member-password-form input { width: 100%; min-height: 48px; padding: 11px 13px; border: 1px solid var(--line-bright); border-radius: var(--radius-sm); outline: 0; color: var(--ink); background: #0e0b1b; }
.member-login-form input:focus, .member-password-form input:focus { border-color: var(--cyan); }
.member-login-form .button { margin-top: 10px; }
.member-login-error { margin: 8px 0 0; padding: 10px 12px; border-left: 3px solid var(--danger); color: #ffd9de; background: rgba(255,128,144,.08); font-size: 13px; }
.member-session { padding-top: 16px; }
.member-session__badge { display: inline-flex; margin-bottom: 20px; padding: 6px 10px; border: 1px solid rgba(68,223,141,.42); border-radius: 999px; color: var(--green); background: rgba(68,223,141,.08); font-size: 12px; font-weight: 800; }
.member-session p { margin: 0; color: var(--muted); font-size: 12px; }
.member-session > strong { display: block; margin-bottom: 22px; overflow-wrap: anywhere; font-size: 18px; }
.member-session .button + .button { margin-top: 10px; }
.member-password-change { margin-top: 10px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: #17122b; }
.member-password-change summary { padding: 13px 15px; cursor: pointer; color: #dcd7eb; font-size: 14px; font-weight: 750; }
.member-password-change[open] summary { border-bottom: 1px solid var(--line); }
.member-dialog__panel .member-password-form { padding: 14px; }
.member-password-help { margin: 0 0 4px; color: var(--muted); font-size: 12px; }
.member-password-form small { color: var(--muted); font-size: 11px; }
.member-password-status { margin: 8px 0 0; padding: 10px 12px; border-left: 3px solid var(--danger); background: rgba(255,128,144,.08); color: #ffd9de; font-size: 13px; }
.member-password-status[data-tone="success"] { border-left-color: var(--green); background: rgba(68,223,141,.08); color: #caffdf; }
#member-logout-button { margin-top: 10px; }
.apk-download-status { margin: 10px 0 0; color: var(--muted); font-size: 12px; line-height: 1.45; }
.apk-download-status[data-tone="success"] { color: var(--green); }
.apk-download-status[data-tone="error"] { color: #ffd9de; }
[aria-disabled="true"] { cursor: wait; opacity: .72; pointer-events: none; }

.access-page { display: grid; min-height: 100svh; place-items: center; padding: 24px; }
.access-card { width: min(560px, 100%); padding: 40px; border: 1px solid var(--line-bright); border-radius: var(--radius-lg); background: var(--surface); text-align: center; }
.access-card img { width: 120px; height: 120px; margin: 0 auto 20px; object-fit: contain; }
.access-card h1 { margin-bottom: 16px; font-size: clamp(32px, 7vw, 52px); }
.access-card > p:not(.eyebrow) { color: var(--muted); }

@media (max-width: 900px) {
  .site-header { grid-template-columns: 1fr auto; }
  nav { display: none; }
  .hero { grid-template-columns: 1fr; min-height: auto; padding-block: 56px; }
  .hero__mark { min-height: 430px; }
  .overview-layout { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .guide-steps { grid-template-columns: repeat(2, 1fr); }
  .guide-steps > li:last-child { grid-column: 1 / -1; min-height: auto; }
  .prompt-examples { grid-template-columns: 1fr; }
  .command-center, .demo-layout { grid-template-columns: 1fr; }
  .key-panel { border-right: 0; border-bottom: 1px solid var(--line); }
  .demo-layout { gap: 40px; }
  .phone-video { width: min(100%, 420px); }
}

@media (max-width: 640px) {
  :root { --shell: min(100% - 24px, 1180px); }
  .site-header { min-height: 64px; padding-inline: 12px; }
  .brand img { width: 42px; height: 42px; }
  .brand strong { font-size: 17px; }
  .brand small, #install-button { display: none; }
  .site-header__actions { gap: 0; }
  #member-login-button { min-height: 38px; padding-inline: 12px; }
  .hero { gap: 36px; padding-block: 40px 56px; }
  h1 { font-size: clamp(44px, 15vw, 68px); }
  .hero__mark { min-height: 330px; }
  .hero__actions .button { width: 100%; }
  .section { padding-block: 64px; }
  .section-heading { align-items: flex-start; flex-direction: column; }
  .section-heading--wide > p { text-align: left; }
  .section-heading h2, .demo-copy h2, .boundary-card h2 { font-size: 30px; }
  .overview-main, .definition-card { padding: 22px; }
  .agent-flow { grid-template-columns: 1fr; }
  .agent-flow > div { min-height: auto; }
  .agent-flow i { transform: rotate(90deg); text-align: center; }
  .feature-grid, .guide-steps { grid-template-columns: 1fr; }
  .feature-grid article { min-height: auto; }
  .guide-steps > li, .guide-steps > li:last-child { grid-column: auto; min-height: auto; }
  .guide-steps > li > span, .feature-number { margin-bottom: 20px; }
  .command-center { border-radius: var(--radius-md); }
  .key-panel, .chat-panel { padding: 18px; }
  .chat-panel { min-height: 560px; }
  .chat-form { grid-template-columns: 1fr; }
  .message { max-width: 92%; }
  .install-grid, .boundary-columns { grid-template-columns: 1fr; }
  .install-card, .boundary-card { padding: 22px; }
  .boundary-card__title { align-items: flex-start; }
  .boundary-card__title > span { flex: 0 0 40px; width: 40px; height: 40px; }
  footer .shell { align-items: flex-start; flex-direction: column; }
  .member-dialog__panel { padding: 24px 20px; }
  .access-card { padding: 28px 20px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}