body {
  min-height: 100vh;
  background: var(--theme-background), var(--color-canvas);
}

.app-shell {
  min-height: 100vh;
}

.app-sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 30;
  display: flex;
  width: 250px;
  flex-direction: column;
  border-right: 1px solid var(--color-sidebar-border);
  background: var(--color-sidebar);
  transform: translateX(-102%);
  transition: transform 180ms ease;
}

.app-sidebar.sidebar-open {
  transform: translateX(0);
}

.sidebar-brand {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.75rem;
  min-height: 88px;
  padding: 1.2rem 1rem;
  border-bottom: 1px solid var(--color-sidebar-border);
}

.brand-mark {
  display: grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  border-radius: 50%;
  background: var(--color-primary);
  color: white;
  font-size: 1.35rem;
}

.sidebar-brand strong {
  display: block;
  font-size: 0.98rem;
  white-space: nowrap;
}

.sidebar-brand div span {
  display: block;
  margin-top: 0.15rem;
  color: var(--color-muted);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
}

.sidebar-close {
  display: block;
  border: 0;
  background: transparent;
  color: var(--color-text);
  font-size: 1.6rem;
}

.app-nav {
  display: grid;
  gap: 0.25rem;
  padding: 1rem 0.65rem;
}

.nav-item {
  position: relative;
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  align-items: center;
  gap: 0.55rem;
  min-height: 3.2rem;
  border: 0;
  border-radius: 0.65rem;
  background: transparent;
  color: var(--color-text);
  padding: 0.55rem 0.8rem;
  text-align: left;
  font-weight: 680;
}

.nav-item:hover,
.nav-item-active {
  background: var(--color-sidebar-active);
  color: var(--color-primary);
}

.nav-item-active::before {
  content: "";
  position: absolute;
  left: -0.65rem;
  width: 3px;
  height: 1.85rem;
  border-radius: 999px;
  background: var(--color-primary);
}

.nav-icon {
  font-size: 1.4rem;
  text-align: center;
}

.sidebar-account {
  display: grid;
  gap: 0.65rem;
  margin-top: auto;
  padding: 1rem;
  border-top: 1px solid var(--color-sidebar-border);
}

.current-theme-line {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  color: var(--color-muted);
  font-size: 0.74rem;
}

.current-theme-line strong {
  overflow: hidden;
  color: var(--color-text);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.45rem;
}

.sidebar-actions .button {
  min-height: 2.25rem;
  padding: 0.4rem 0.5rem;
  font-size: 0.75rem;
}

.app-workspace {
  min-height: 100vh;
  margin-left: 0;
}

.app-main {
  width: min(1120px, calc(100% - 3rem));
  margin: 0 auto;
  padding: 1.6rem 0 4rem;
}

.mobile-header {
  position: sticky;
  top: 0;
  z-index: 15;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  min-height: 3.5rem;
  border-bottom: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-canvas) 92%, transparent);
  padding: 0.55rem 1rem;
  backdrop-filter: blur(12px);
}

.menu-button {
  border: 0;
  background: transparent;
  color: var(--color-text);
  font-size: 1.35rem;
}

.view-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.3rem;
}

.view-header h1 {
  margin-bottom: 0.2rem;
  font-size: clamp(1.8rem, 4vw, 2.55rem);
}

.view-lead {
  margin: 0.35rem 0 0;
  color: var(--color-muted);
}

.phase-placeholder {
  display: grid;
  min-height: 420px;
  place-items: center;
  align-content: center;
  border: 1px dashed var(--color-border);
  border-radius: 1rem;
  background: var(--color-panel);
  padding: 2rem;
  text-align: center;
}

.phase-placeholder p {
  max-width: 38rem;
  color: var(--color-muted);
}

.placeholder-icon {
  color: var(--color-primary);
  font-size: 3rem;
}

.nav-scrim {
  display: none;
}

.nav-open .nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: block;
  background: var(--color-backdrop);
}

@media (max-width: 860px) {
  .app-main {
    width: min(100% - 1rem, 760px);
    padding-top: 1rem;
  }
}