:root {
  --exr-dark-blue: #006666;
  --exr-light-blue: #33cccc;
  --exr-black: #333333;
  --exr-bg: #0b1b1d;
  --exr-panel: #0f2a2d;
  --exr-panel-hover: #133538;
  --exr-border: rgba(51, 204, 204, 0.18);
  --exr-border-strong: rgba(51, 204, 204, 0.45);
  --exr-text: #eaf6f6;
  --exr-muted: #8fb1b1;
}

.landing-body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(1100px 600px at 15% -10%, rgba(0, 102, 102, 0.55), transparent 60%),
    radial-gradient(900px 500px at 100% 110%, rgba(51, 204, 204, 0.18), transparent 55%),
    var(--exr-bg);
  color: var(--exr-text);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

.landing-body > .landing-shell {
  align-self: center;
  padding: 56px 20px;
}

/* ---- Site header (parity with React AppHeader) ---- */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  height: 48px;
  padding: 8px 16px;
  border-bottom: 1px solid var(--exr-border);
  background: var(--exr-bg);
  flex-shrink: 0;
  position: sticky;
  top: 0;
  z-index: 20;
}
@media (min-width: 768px) {
  .site-header { padding: 8px; }
}
.site-header-left,
.site-header-right {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.app-switcher { position: relative; }
.app-switcher-trigger {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 32px;
  padding: 0 10px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 4px;
  color: var(--exr-text);
  font: inherit;
  cursor: pointer;
  transition: background 140ms ease, border-color 140ms ease;
}
.app-switcher-trigger:hover,
.app-switcher-trigger[aria-expanded="true"] {
  background: var(--exr-panel);
  border-color: var(--exr-border);
}
.app-switcher-wordmark {
  height: 18px;
  width: auto;
  display: block;
}
.app-switcher-divider {
  width: 1px;
  height: 16px;
  background: var(--exr-border-strong);
}
.app-switcher-app {
  font-size: 14px;
  font-weight: 600;
  color: var(--exr-text);
  white-space: nowrap;
}
.app-switcher-caret {
  width: 12px;
  height: 12px;
  color: var(--exr-muted);
  transition: transform 140ms ease;
}
.app-switcher-trigger[aria-expanded="true"] .app-switcher-caret {
  transform: rotate(180deg);
}

.app-switcher-menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 240px;
  background: var(--exr-panel);
  border: 1px solid var(--exr-border-strong);
  border-radius: 6px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.app-switcher-menu[hidden] { display: none; }

.app-switcher-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 10px;
  border-radius: 4px;
  color: var(--exr-text);
  text-decoration: none;
  transition: background 120ms ease;
}
.app-switcher-item:hover {
  background: var(--exr-panel-hover);
  text-decoration: none;
}
.app-switcher-item-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--exr-text);
}
.app-switcher-item-host {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 11px;
  color: var(--exr-muted);
}
.app-switcher-item.is-current {
  background: rgba(51, 204, 204, 0.10);
}
.app-switcher-item.is-current .app-switcher-item-name {
  color: var(--exr-light-blue);
}

.landing-shell {
  width: 100%;
  max-width: 960px;
  display: flex;
  flex-direction: column;
  gap: 44px;
}

.landing-header {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.logo-mark {
  width: auto;
  height: 140px;
  max-width: 100%;
  display: block;
  filter: drop-shadow(0 6px 24px rgba(51, 204, 204, 0.18));
}
@media (max-width: 720px) {
  .logo-mark { height: 110px; }
}

.landing-lede {
  font-size: 22px;
  color: var(--exr-text);
  margin: 0;
  max-width: 680px;
  line-height: 1.45;
  font-weight: 300;
  letter-spacing: 0.2px;
}

.landing-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}
@media (max-width: 720px) {
  .landing-cards { grid-template-columns: 1fr; }
}

.landing-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 28px;
  background: var(--exr-panel);
  border: 1px solid var(--exr-border);
  border-radius: 6px;
  color: var(--exr-text);
  text-decoration: none;
  transition: transform 140ms ease, border-color 140ms ease, background 140ms ease;
  min-height: 240px;
}
.landing-card:hover:not(.disabled) {
  transform: translateY(-2px);
  border-color: var(--exr-border-strong);
  background: var(--exr-panel-hover);
  text-decoration: none;
}
.landing-card h2 {
  margin: 0;
  font-size: 26px;
  font-weight: 600;
  color: var(--exr-text);
  letter-spacing: 0.3px;
}
.landing-card p {
  margin: 0;
  color: var(--exr-muted);
  line-height: 1.6;
  text-align: justify;
  hyphens: auto;
}
.landing-card-eyebrow {
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--exr-light-blue);
  font-weight: 600;
}
.landing-card-cta {
  margin-top: auto;
  padding-top: 14px;
  font-weight: 600;
  color: var(--exr-light-blue);
  letter-spacing: 0.3px;
}
.landing-card-cta.muted { color: var(--exr-muted); }
.landing-card .bookmark {
  display: inline-block;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 13px;
  background: rgba(51, 204, 204, 0.10);
  color: var(--exr-light-blue);
  padding: 3px 8px;
  border-radius: 3px;
  white-space: nowrap;
}
.landing-card.disabled {
  opacity: 0.78;
  cursor: not-allowed;
}

.beta-shell {
  text-align: center;
  padding: 32px 28px;
  background: linear-gradient(135deg, rgba(0, 102, 102, 0.45), rgba(51, 204, 204, 0.10));
  border: 1px solid var(--exr-border-strong);
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}
.beta-shell h3 {
  margin: 0;
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--exr-light-blue);
  font-weight: 600;
}
.beta-btn {
  font-size: 15px;
  padding: 13px 28px;
  background: var(--exr-light-blue);
  color: var(--exr-black);
  border-radius: 3px;
  border: none;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.5px;
  transition: background 140ms ease, color 140ms ease;
}
.beta-btn:hover {
  background: #5dd7d7;
  text-decoration: none;
}

.landing-footer {
  text-align: center;
  color: var(--exr-muted);
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
}