:root {
  --page: #07110f;
  --panel: #0c1916;
  --panel-deep: #050b0a;
  --ink: #edf5ef;
  --muted: #9eaea5;
  --faint: #718078;
  --line: rgba(230, 249, 238, 0.14);
  --line-strong: rgba(230, 249, 238, 0.22);
  --mint: #71f5bd;
  --cyan: #70dcff;
  --lime: #d6ff67;
  --warning: #ffc66d;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}
html {
  min-width: 320px;
  color-scheme: dark;
  scroll-behavior: smooth;
}
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% 8%, rgba(113, 245, 189, 0.08), transparent 30rem), var(--page);
  font-family: var(--sans);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
button,
input {
  font: inherit;
}
a {
  color: inherit;
  text-decoration: none;
}
:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 3px;
}
.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 8px 13px;
  color: var(--page);
  background: var(--mint);
  font-weight: 750;
  transform: translateY(-180%);
}
.skip-link:focus {
  transform: translateY(0);
}
.site-header,
.demo-intro,
.boundary-strip,
.demo-toolbar,
.demo-grid,
.demo-mailbox,
.demo-explanation {
  width: min(calc(100% - 40px), 1420px);
  margin-inline: auto;
}
.site-header {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 68px;
  border-bottom: 1px solid var(--line);
  font-size: 0.78rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  justify-self: start;
}
.brand-logo {
  display: block;
  width: 164px;
  height: auto;
}
.site-header p {
  margin: 0;
  color: var(--muted);
}
.site-header strong,
.footer-demo-note {
  color: var(--mint);
}
.back-link {
  justify-self: end;
  color: var(--muted);
  font-weight: 650;
}
.back-link:hover,
.site-map-nav a:hover {
  color: var(--mint);
}
.demo-intro {
  padding: clamp(58px, 7vw, 100px) 0 40px;
  text-align: center;
}
.eyebrow {
  margin: 0 0 12px;
  color: var(--mint);
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 720;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.demo-intro h1,
.demo-explanation h2 {
  margin: 0;
  letter-spacing: -0.055em;
  line-height: 1.03;
}
.demo-intro h1 {
  font-size: clamp(2.7rem, 6vw, 5.7rem);
  font-weight: 650;
}
.demo-intro > p:last-child {
  max-width: 800px;
  margin: 22px auto 0;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.7;
}
.boundary-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-bottom: 24px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(12, 25, 22, 0.8);
}
.boundary-strip > div {
  min-width: 0;
  padding: 18px 22px;
  border-right: 1px solid var(--line);
}
.boundary-strip > div:last-child {
  border-right: 0;
}
.boundary-strip span,
.boundary-strip strong,
.boundary-strip small {
  display: block;
}
.boundary-strip span {
  color: var(--faint);
  font-family: var(--mono);
  font-size: 0.61rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.boundary-strip strong {
  margin-top: 5px;
  font-size: 0.92rem;
}
.boundary-strip small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.72rem;
}
.demo-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel-deep);
}
.demo-toolbar p {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
}
.primary-action {
  flex: 0 0 auto;
  padding: 10px 15px;
  border: 0;
  border-radius: 7px;
  color: var(--page);
  background: var(--mint);
  font-weight: 760;
  cursor: pointer;
}
.primary-action:disabled {
  cursor: wait;
  opacity: 0.55;
}
.client-panel,
.demo-mailbox {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(12, 25, 22, 0.92);
  box-shadow: 0 24px 68px rgba(0, 0, 0, 0.22);
}
.client-heading,
.demo-mailbox > header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 20px 22px;
  border-bottom: 1px solid var(--line);
}
.client-heading span,
.demo-mailbox header > span {
  display: block;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}
.client-heading h2,
.demo-mailbox h2 {
  margin: 4px 0 0;
  font-size: 1.25rem;
  letter-spacing: -0.035em;
}
.client-heading small {
  color: var(--mint);
  font-family: var(--mono);
  font-size: 0.65rem;
}
.demo-mailbox {
  margin-top: 24px;
}
.demo-mailbox header small {
  color: var(--mint);
  font-size: 0.7rem;
}
.mailbox-envelope {
  margin: 18px;
  padding: 16px;
  border: 1px dashed rgba(214, 255, 103, 0.3);
  border-radius: 10px;
  background: var(--panel-deep);
}
.mailbox-envelope strong {
  display: block;
  overflow: hidden;
  color: var(--lime);
  font-family: var(--mono);
  font-size: 0.68rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.mailbox-envelope pre {
  max-height: 150px;
  margin: 12px 0 0;
  overflow: auto;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.65rem;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.mailbox-note {
  margin: 0 20px 20px;
  color: var(--faint);
  font-size: 0.73rem;
}
.demo-explanation {
  padding: clamp(58px, 8vw, 100px) 0;
}
.demo-explanation h2 {
  max-width: 780px;
  font-size: clamp(2rem, 4vw, 3.7rem);
}
.demo-explanation > p:last-child {
  max-width: 820px;
  margin: 20px 0 0;
  color: var(--muted);
  line-height: 1.75;
}
.site-map-footer {
  border-top: 1px solid var(--line);
  background: #050b0a;
}
.site-map-footer-grid {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(520px, 1.4fr);
  gap: 70px;
  width: min(calc(100% - 40px), 1420px);
  margin: 0 auto;
  padding: 56px 0 46px;
}
.site-map-brand p {
  max-width: 280px;
  color: var(--muted);
  font-size: 0.82rem;
}
.site-map-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.site-map-nav section {
  display: grid;
  align-content: start;
  gap: 9px;
}
.site-map-nav h2 {
  margin: 0 0 5px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}
.site-map-nav a {
  color: var(--muted);
  font-size: 0.8rem;
}
.site-map-bottom {
  display: flex;
  justify-content: space-between;
  width: min(calc(100% - 40px), 1420px);
  margin: 0 auto;
  padding: 18px 0 24px;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font-family: var(--mono);
  font-size: 0.62rem;
}
@media (max-width: 820px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }
  .site-header p {
    display: none;
  }
  .boundary-strip,
  .site-map-footer-grid {
    grid-template-columns: 1fr;
  }
  .boundary-strip > div {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .boundary-strip > div:last-child {
    border-bottom: 0;
  }
  .site-map-footer-grid {
    gap: 40px;
  }
}
@media (max-width: 580px) {
  .site-header,
  .demo-intro,
  .boundary-strip,
  .demo-toolbar,
  .demo-grid,
  .demo-mailbox,
  .demo-explanation {
    width: min(calc(100% - 24px), 1420px);
  }
  .brand-logo {
    width: 136px;
  }
  .demo-toolbar,
  .site-map-bottom {
    align-items: flex-start;
    flex-direction: column;
  }
  .primary-action {
    width: 100%;
  }
  .site-map-nav {
    grid-template-columns: 1fr 1fr;
  }
}