.skip-link {
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  left: 12px;
  padding: 10px 14px;
  position: fixed;
  top: -80px;
  z-index: 100;
}
.skip-link:focus { top: 12px; }

.app-layout { min-height: 100vh; }
.navigation-rail {
  background: var(--md-sys-color-surface-container);
  bottom: 0;
  display: flex;
  height: 72px;
  justify-content: space-around;
  left: 0;
  padding: 8px;
  position: fixed;
  right: 0;
  z-index: 20;
}
.nav-item {
  align-items: center;
  border-radius: var(--md-sys-shape-corner-large);
  color: var(--md-sys-color-on-surface-variant);
  display: flex;
  flex: 1;
  flex-direction: column;
  font: var(--md-sys-typescale-label-large);
  justify-content: center;
  max-width: 96px;
  text-decoration: none;
}
.nav-item[aria-current="page"] { background: var(--md-sys-color-secondary-container); color: var(--md-sys-color-on-secondary-container); }
.app-content { min-width: 0; padding-bottom: 80px; }
.top-app-bar {
  align-items: center;
  background: color-mix(in srgb, var(--md-sys-color-surface) 92%, transparent);
  display: flex;
  justify-content: space-between;
  min-height: 84px;
  padding: 12px 20px;
  position: sticky;
  top: 0;
  z-index: 10;
}
.top-app-bar h1 { font: var(--md-sys-typescale-title-large); margin: 0; }
.eyebrow { color: var(--md-sys-color-primary); font: var(--md-sys-typescale-label-large); text-transform: uppercase; }
#app-main { margin: 0 auto; max-width: 1480px; padding: 24px 16px; }
.page-header { align-items: end; display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between; margin-bottom: 24px; }
.page-header h2 { font: var(--md-sys-typescale-headline-medium); margin: 0; }
.environment-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr)); }
.content-grid { display: grid; gap: 16px; }
.creation-panel { margin-bottom: 20px; }
.creation-form { align-items: end; display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 190px), 1fr)); }
.settings-grid { grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); }

.auth-page {
  background:
    radial-gradient(circle at 10% 10%, color-mix(in srgb, var(--md-sys-color-primary-container) 70%, transparent), transparent 38%),
    var(--md-sys-color-surface);
  min-height: 100vh;
}
.auth-layout {
  display: grid;
  gap: 32px;
  margin: 0 auto;
  max-width: 1080px;
  min-height: 100vh;
  padding: 32px 20px;
  place-content: center;
}
.auth-brand { max-width: 440px; }
.auth-brand h1 { font: 600 2.8rem/1.05 system-ui, sans-serif; margin: 8px 0 16px; }
.auth-mark { color: var(--md-sys-color-primary); font-size: 3.5rem; }
.auth-card {
  background: var(--md-sys-color-surface-container-lowest);
  border-radius: var(--md-sys-shape-corner-extra-large);
  box-shadow: var(--md-sys-elevation-2);
  padding: 28px;
  width: min(100%, 460px);
}
.auth-card h2 { font: var(--md-sys-typescale-headline-medium); margin: 4px 0 24px; }
.auth-card form { display: grid; gap: 18px; }
.auth-card .md-filled-button { justify-self: start; }

@media (min-width: 600px) {
  .app-layout { display: grid; grid-template-columns: 88px minmax(0, 1fr); }
  .navigation-rail {
    align-items: center;
    bottom: auto;
    flex-direction: column;
    gap: 8px;
    height: 100vh;
    justify-content: flex-start;
    padding: 96px 8px 16px;
    right: auto;
    top: 0;
    width: 88px;
  }
  .nav-item { flex: 0 0 64px; width: 72px; }
  .app-content { grid-column: 2; padding-bottom: 0; }
  #app-main { padding: 32px; }
  .auth-layout { grid-template-columns: minmax(280px, 1fr) minmax(360px, 460px); padding: 48px; }
}

@media (min-width: 1200px) {
  .app-layout { grid-template-columns: 280px minmax(0, 1fr); }
  .navigation-rail { align-items: stretch; padding: 112px 16px 24px; width: 280px; }
  .nav-item { flex: 0 0 56px; flex-direction: row; gap: 14px; justify-content: flex-start; max-width: none; padding: 0 20px; width: auto; }
  #app-main { padding: 40px 48px; }
}