/* Existing SEC identity, refined for a small public landing page.
   DESIGN_VARIANCE 5 / MOTION_INTENSITY 2 / VISUAL_DENSITY 3.
   Native CSS. Supplied SEC shield identity; motion only provides feedback. */
.landing { --text: #f2f2f2; --muted: #ababab; --accent: #f2f2f2; font-family: "Segoe UI", Arial, sans-serif; }
.landing .shell { width: min(1080px, calc(100% - 72px)); }
.landing h1, .landing h2, .landing h3, .landing .brand { font-family: Bahnschrift, "Segoe UI", Arial, sans-serif; }
.landing .header { border-bottom: 0; }
.landing .header-inner { height: 84px; }
.landing .brand { font-size: 24px; font-weight: 700; }
.landing .brand::before { height: 40px; width: 32px; background-size: 64px; }
.landing .nav { gap: 30px; font-size: 13px; }
.landing .nav-invite { color: var(--accent); padding-left: 26px; border-left: 1px solid var(--line); }
.landing .nav-invite span { margin-left: 8px; }
.intro { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); align-items: center; gap: 80px; padding-top: 66px; padding-bottom: 85px; }
.intro > * { min-width: 0; }
.product-label { font-size: 13px; margin: 0 0 24px; color: var(--accent); }
.intro h1 { font-size: clamp(42px, 4.2vw, 57px); line-height: 1.13; font-weight: 600; letter-spacing: -.05em; margin: 0 0 26px; }
.intro-description { max-width: 405px; font-size: 16px; line-height: 1.75; color: var(--muted); margin: 0 0 29px; }
.landing .actions { align-items: center; gap: 23px; }
.landing .button { padding: 12px 19px; font-size: 13px; font-weight: 600; border-radius: 4px; }
.landing .button span { padding-left: 9px; }
.text-link { font-size: 13px; text-decoration: none; white-space: nowrap; }
.text-link span { margin-left: 7px; color: var(--muted); }
.brand-art { align-self: stretch; display: flex; flex-direction: column; justify-content: center; position: relative; min-width: 0; max-width: 100%; padding: 0 0 0 24px; }
.art-logo { display: block; width: 100%; max-width: 330px; margin-inline: auto; height: auto; aspect-ratio: 1; object-fit: contain; mix-blend-mode: lighten; }
.art-rule { height: 1px; width: 100%; background: var(--line); margin: 24px 0 17px; }
.art-caption { color: var(--muted); font: 12px Consolas, "Courier New", monospace; }
.product-overview { border-top: 1px solid var(--line); padding: 42px 0 55px; display: grid; grid-template-columns: 1fr 1.7fr; gap: 90px; }
.overview-title h2 { font-size: 28px; letter-spacing: -.035em; line-height: 1.2; margin-bottom: 16px; font-weight: 550; }
.overview-title p { color: var(--muted); font-size: 14px; line-height: 1.7; margin: 0; }
.overview-items { display: grid; gap: 26px; }
.overview-items article { display: grid; grid-template-columns: 1fr 1.5fr; align-items: start; gap: 28px; }
.overview-items h3 { font-size: 16px; letter-spacing: -.01em; line-height: 1.4; font-weight: 600; margin: 0; }
.overview-items p { color: var(--muted); font-size: 14px; line-height: 1.7; margin: 0; }
.command-section { background: #171717; padding: 57px 0 48px; }
.command-layout { display: grid; grid-template-columns: 1fr 1.7fr; gap: 90px; }
.command-heading h2, .setup-heading h2 { font-size: 31px; line-height: 1.18; letter-spacing: -.035em; font-weight: 550; margin-bottom: 19px; }
.command-heading p, .setup-heading p { color: var(--muted); font-size: 14px; line-height: 1.75; max-width: 245px; margin: 0 0 22px; }
.landing .command-tabs { margin: 0 0 25px; gap: 25px; border-bottom: 1px solid var(--line); flex-wrap: nowrap; }
.landing .command-tabs button { font: 13px "Segoe UI", Arial, sans-serif; border: 0; border-radius: 0; padding: 0 0 15px; margin-bottom: -1px; white-space: nowrap; background: transparent; color: var(--muted); border-bottom: 2px solid transparent; }
.landing .command-tabs [aria-selected=true] { background: transparent; color: var(--text); border-bottom-color: var(--accent); }
.landing .command-tabs button:hover { color: var(--text); }
.landing .command-list { display: grid; grid-template-columns: 1fr; gap: 20px; min-height: 236px; }
.landing .command-list li { display: grid; grid-template-columns: minmax(160px, 1fr) 1.25fr; gap: 22px; align-items: start; }
.landing .command-list code { font-size: 12px; line-height: 1.65; }
.landing .command-list span { font-size: 13px; color: #b7b7b7; line-height: 1.65; }
.command-footnote { font-size: 11px; color: var(--muted); margin: 28px 0 0; }
.onboarding { display: grid; grid-template-columns: 1fr; gap: 24px; padding-top: 55px; padding-bottom: 44px; }
.setup-heading h2 br { display: none; }
.setup-heading p { max-width: 540px; margin-bottom: 0; }
.onboarding-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 42px; padding-top: 25px; border-top: 1px solid var(--line); }
.onboarding-steps article { position: relative; padding: 0; }
.onboarding-steps h3 { font-size: 17px; font-weight: 600; letter-spacing: -.02em; margin: 0 0 8px; }
.onboarding-steps p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.75; max-width: 530px; }
.onboarding-steps code { font-size: 12px; }
.notes { padding-top: 12px; padding-bottom: 55px; display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.notes details { border-top: 1px solid var(--line); }
.notes summary { font-size: 13px; padding: 18px 25px 18px 0; cursor: pointer; list-style: none; position: relative; }
.notes summary::-webkit-details-marker { display: none; }
.notes summary::after { content: '+'; position: absolute; right: 2px; top: 15px; font-size: 19px; color: var(--muted); }
.notes details[open] summary::after { content: '−'; }
.notes details>div { padding: 0 22px 10px 0; }
.notes p { color: var(--muted); font-size: 13px; line-height: 1.8; margin: 0 0 14px; }
.landing .footer { padding: 27px 0 35px; }
.footer-identity { display: flex; align-items: center; gap: 24px; }
.footer-identity .brand { font-size: 19px; }
.footer-identity .brand::before { height: 32px; width: 26px; background-size: 50px; }
.footer-identity>span { font-size: 11px; }
.landing .footer-links { font-size: 12px; gap: 22px; }
@media (max-width: 1024px) {
  .intro { gap: 48px; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); padding-top: 50px; padding-bottom: 60px; }
  .intro h1 { font-size: 45px; }
  .art-logo { max-width: 300px; }
  .brand-art { padding-left: 0; }
  .product-overview, .command-layout { gap: 48px; grid-template-columns: .9fr 1.6fr; }
  .onboarding-steps { gap: 28px; }
  .overview-items article { grid-template-columns: 1fr; gap: 7px; }
  .landing .command-list li { grid-template-columns: 1fr 1fr; gap: 17px; }
  .footer-identity { gap: 15px; }
  .footer-identity>span { max-width: 160px; }
}
@media (max-width: 767px) {
  .landing .shell { width: calc(100% - 40px); }
  .landing .header-inner { height: 70px; }
  .landing .nav { top: 70px; gap: 18px; }
  .landing .nav-invite { border-left: 0; padding-left: 0; }
  .intro { grid-template-columns: 1fr; gap: 0; padding-top: 40px; padding-bottom: 46px; }
  .intro h1 { font-size: clamp(35px, 8.3vw, 48px); max-width: 500px; }
  .product-label { margin-bottom: 20px; font-size: 12px; }
  .intro-description { max-width: 400px; font-size: 15px; margin-bottom: 25px; }
  .brand-art { display: none; }
  .landing .actions { gap: 19px; }
  .text-link { font-size: 12px; }
  .product-overview { grid-template-columns: 1fr; gap: 27px; padding: 31px 0 40px; }
  .overview-title h2 { font-size: 26px; margin-bottom: 10px; }
  .overview-title h2 br, .overview-title p br { display: none; }
  .overview-items { gap: 23px; }
  .overview-items article { gap: 7px; }
  .overview-items p { max-width: 470px; }
  .command-section { padding: 38px 0; }
  .command-layout, .onboarding { grid-template-columns: 1fr; gap: 25px; }
  .command-heading h2, .setup-heading h2 { font-size: 28px; margin-bottom: 14px; }
  .command-heading h2 br, .setup-heading h2 br { display: none; }
  .command-heading p, .setup-heading p { max-width: 400px; margin-bottom: 16px; }
  .landing .command-tabs { gap: 23px; margin-bottom: 24px; }
  .landing .command-list { min-height: 334px; gap: 20px; }
  .landing .command-list li { grid-template-columns: 1fr; gap: 4px; }
  .landing .command-list code { font-size: 13px; }
  .command-footnote { margin-top: 25px; line-height: 1.7; }
  .onboarding { padding-top: 41px; padding-bottom: 30px; gap: 17px; }
  .onboarding-steps { grid-template-columns: 1fr; gap: 23px; padding-top: 23px; }
  .notes { grid-template-columns: 1fr; gap: 0; padding-top: 5px; padding-bottom: 30px; }
  .footer-identity { flex-direction: column; align-items: flex-start; gap: 12px; }
  .footer-identity>span { max-width: none; }
  .landing .footer-inner { gap: 23px; }
  .landing .footer-links { gap: 19px; }
}