/* Shell: navigation and document footer share one continuous canvas. */
.app-shell {
  --sidebar: 208px;
  display: grid;
  grid-template-columns: var(--sidebar) minmax(0,1fr);
  min-height: 100dvh;
}
.app-sidebar {
  position: sticky;
  top: 0;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  padding: 24px 12px 16px;
  border-right: 1px solid var(--bdr);
  background: var(--bg);
  min-width: 0;
  z-index: 30;
}
.brand-lockup {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  padding: 0 8px;
  margin-bottom: 32px;
}
.calibration-mark {
  width: 34px;
  height: 34px;
  position: relative;
  border: 5px solid var(--text);
  border-radius: 50%;
  flex-shrink: 0;
}
.calibration-mark::before {
  content: "";
  position: absolute;
  inset: 6px;
  background: var(--text);
  border-radius: 50%;
}
.calibration-mark::after {
  content: "";
  position: absolute;
  right: -5px;
  top: -4px;
  width: 10px;
  height: 10px;
  border: 2px solid var(--bg);
  border-radius: 50%;
  background: var(--blue);
}
.calibration-mark>* {
  display: none;
}
.brand-copy span {
  display: block;
  font-size: 10px;
  color: var(--text2);
  letter-spacing: .01em;
}
.brand-copy .brand-name {
  font-size: 14px;
  font-weight: 650;
  color: var(--text);
  white-space: nowrap;
  margin-bottom: 2px;
}
.sidebar-collapse {
  position: absolute;
  right: -12px;
  top: 28px;
  width: 24px;
  height: 24px;
  padding: 3px;
  border-radius: 50%;
}
.sidebar-collapse svg {
  width: 14px;
  height: 14px;
}
.nav-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 10px;
  color: var(--text3);
  padding: 0 12px;
  margin-bottom: 10px;
}
.sidebar-version {
  display: inline-flex;
  padding: 3px 9px;
  border-radius: 999px;
  background: #e5edf8;
  color: #385d8b;
  font: 600 10px/1.4 var(--mono);
}
.side-nav {
  display: grid;
  gap: 4px;
}
.side-nav-btn {
  border: 0;
  background: transparent;
  min-height: 40px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  text-align: left;
  font-size: 13px;
  font-weight: 550;
  min-width: 0;
  border-radius: 7px;
}
.side-nav-btn svg {
  width: 18px;
  height: 18px;
}
.side-nav-btn.on,.side-nav-btn[aria-current=page] {
  color: var(--blue);
  background: var(--blue-lt);
}
.nav-count {
  margin-left: auto;
  color: var(--text2);
  font: 10px var(--mono);
}
.sidebar-spacer {
  flex: 1;
  min-height: 24px;
}
.sidebar-privacy {
  padding: 10px 12px;
  border: 0;
  border-radius: 0;
  font-size: 10px;
  line-height: 1.8;
  color: var(--text2);
  margin-bottom: 12px;
}
.sidebar-tools {
  display: grid;
  gap: 2px;
  padding: 6px;
  border: 1px solid #e3e8ef;
  border-radius: 10px;
  background: #edf1f6;
}
.sidebar-tool {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 36px;
  background: transparent;
  border: 1px solid transparent;
  text-align: left;
  padding: 7px 10px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text);
}
.sidebar-tool svg {width:16px;height:16px;color:#64778e;flex-shrink:0}
.sidebar-tool:hover {background:var(--surf);border-color:#dde5ef;color:var(--blue)}
.sidebar-tool:hover svg {color:var(--blue)}
.app-stage {
  min-width: 0;
  display: flex;
  flex-direction: column;
}
.app-topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  height: 68px;
  flex-shrink: 0;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: var(--bg);
  border-bottom: 1px solid var(--bdr);
}
.topbar-copy {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.topbar-eyebrow {
  font-size: 10px;
  color: var(--text3);
}
.topbar-title {
  font: 650 19px/1.3 var(--display);
  letter-spacing: -.025em;
}
.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}
.icon-button {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  padding: 8px;
}
.icon-button svg {
  width: 18px;
  height: 18px;
}
.topbar-primary {
  white-space: nowrap;
  font-size: 12px;
  min-height: 36px;
}
.app-main {
  min-width: 0;
  outline: none;
  flex: 1;
}
.page {
  display: none;
}
.page.on {
  display: block;
}
.page-frame,.history-grid,.community-page,.base-grid,.test-workspace {
  max-width: 1440px;
  padding: 20px 24px 24px;
  margin: 0 auto;
  min-width: 0;
}
.page-task-head {
  display: none;
}
.site-footer {
  width: calc(100% - 48px);
  max-width: 1392px;
  margin: 0 auto;
  padding: 16px 0 20px;
  border-top: 1px solid var(--bdr);
  color: var(--text3);
  font-size: 11px;
  line-height: 1.7;
  background: transparent;
}
.site-footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.site-footer-brand {
  font: 600 11px var(--mono);
  color: var(--text2);
}
.site-footer-brand span {
  margin-left: 12px;
  font: 11px var(--font);
  color: var(--text3);
}
.site-footer p {
  margin-top: 6px;
  max-width: 900px;
}
.site-filing {
  white-space: nowrap;
}
.app-shell.sidebar-collapsed {
  --sidebar: 68px;
}
.sidebar-collapsed .brand-copy,.sidebar-collapsed .nav-label,.sidebar-collapsed .side-nav-btn>span,.sidebar-collapsed .sidebar-tools,.sidebar-collapsed .sidebar-privacy {
  display: none;
}
.sidebar-collapsed .app-sidebar {
  padding: 24px 10px;
}
.sidebar-collapsed .brand-lockup {
  padding: 0 6px;
}
.sidebar-collapsed .side-nav-btn {
  justify-content: center;
  padding: 10px;
}
.sidebar-collapsed .sidebar-collapse {
  transform: rotate(180deg);
}
@media(max-width:1100px) and (min-width:761px) {
  .app-shell {
    --sidebar: 68px;
  }
  .app-sidebar {
    padding: 24px 10px;
  }
  .brand-copy,.nav-label,.side-nav-btn>span,.sidebar-tools,.sidebar-privacy,.sidebar-collapse {
    display: none;
  }
  .brand-lockup {
    padding: 0 6px;
  }
  .side-nav-btn {
    justify-content: center;
    padding: 10px;
  }
}
@media(max-width:760px) {
  body {
    padding-bottom: calc(76px + env(safe-area-inset-bottom));
  }
  .app-shell,.app-shell.sidebar-collapsed {
    display: block;
    --sidebar: 0px;
    min-height: calc(100dvh - 76px);
  }
  .app-stage {
    min-height: calc(100dvh - 76px);
  }
  .app-sidebar,.sidebar-collapsed .app-sidebar {
    position: fixed;
    inset: auto 12px max(8px,env(safe-area-inset-bottom));
    height: 58px;
    padding: 4px;
    background: #fff;
    border: 1px solid var(--bdr);
    border-radius: 12px;
    box-shadow: 0 4px 16px #18283812;
    display: block;
  }
  .brand-lockup,.brand-copy,.sidebar-spacer,.nav-label,.sidebar-collapse,.sidebar-privacy,.sidebar-tools,.side-nav-btn>span {
    display: none;
  }
  .side-nav {
    grid-template-columns: repeat(5,minmax(0,1fr));
    gap: 3px;
  }
  .side-nav-btn {
    justify-content: center;
    padding: 10px;
    min-height: 48px;
  }
  .app-topbar {
    height: 60px;
    padding: 10px 16px;
    gap: 12px;
  }
  .topbar-eyebrow {
    display: none;
  }
  .topbar-title {
    font-size: 18px;
  }
  .topbar-primary {
    padding: 8px 10px;
    min-height: 40px;
  }
  .topbar-actions {
    gap: 6px;
  }
  .icon-button {
    width: 40px;
    height: 40px;
  }
  .page-frame,.history-grid,.community-page,.base-grid,.test-workspace {
    padding: 16px;
  }
  .site-footer {
    width: calc(100% - 32px);
    padding: 12px 0 16px;
    font-size: 10px;
  }
  .site-footer-top {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }
  .site-footer-brand span {
    font-size: 10px;
  }
}