.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  min-height: 100dvh;
}

.app--home {
  grid-template-columns: 1fr;
}

.app--home .sidebar {
  display: none;
}

.app--home .workspace__bar {
  display: flex;
}

.app--home .workspace__body {
  padding: 0;
  min-height: 100dvh;
}

.app--home .workspace__heading {
  max-width: 40rem;
}

/* Комната общения — на всю ширину workspace (не как узкая карточка входа) */
.app--room .workspace__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  padding: 0;
  overflow: hidden;
}

.app--room .tool-panel--room {
  display: flex;
  flex: 1;
  flex-direction: column;
  align-items: stretch;
  align-self: stretch;
  justify-content: flex-start;
  width: 100%;
  max-width: none;
  min-width: 0;
  min-height: 0;
  padding: 0;
  margin: 0;
  overflow: hidden;
}

.app--room .tool-panel--room > .p2p-room-root,
.app--room .p2p-room-root,
.app--room .p2p-room-tool-root {
  width: 100%;
  max-width: none;
  min-width: 0;
  flex: 1;
  align-self: stretch;
}

.app--room .p2p-room-root > .card {
  width: 100%;
  max-width: none;
  min-width: 0;
  flex: 1;
}

.tool-nav__link--back {
  color: var(--accent);
  font-weight: 600;
}

.tool-nav__link--room.is-active {
  background: var(--ttl-surface-hover);
  color: var(--accent);
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 0.85rem 0.65rem 0.75rem;
  background: var(--ttl-header);
  border-right: 1px solid var(--ttl-border);
  z-index: 40;
  overflow: hidden;
}

.sidebar__brand {
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.55rem 0.55rem;
  margin: 0 -0.1rem;
  border-radius: 0;
  background: var(--ttl-surface);
  border: 1px solid var(--ttl-border);
}

.brand-mark {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  border-radius: 0;
  box-shadow: none;
  overflow: hidden;
}

.brand-mark__icon {
  display: block;
  width: 100%;
  height: 100%;
}

.brand-copy {
  min-width: 0;
  flex: 1;
}

.brand-title {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.05em;
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
}

.brand-title__name {
  font-size: 1.15rem;
  color: var(--brand-name);
  text-transform: none;
  letter-spacing: 0;
}

.brand-title__tld {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--brand-tld);
  letter-spacing: 0;
}

.brand-sub {
  margin: 0.3rem 0 0;
  padding-top: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  line-height: 1.35;
  color: var(--accent);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-top: 1px solid var(--ttl-border);
}

.search {
  position: relative;
  display: flex;
  align-items: center;
}

.search__icon {
  position: absolute;
  left: 0.75rem;
  color: var(--text-faint);
  pointer-events: none;
}

.search input {
  padding-left: 2.35rem;
  padding-right: 2rem;
  background: var(--ttl-bg);
  border: 1px solid var(--ttl-border);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.search__hint {
  position: absolute;
  right: 0.6rem;
  pointer-events: none;
}

.tool-nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: 0.15rem;
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}

.tool-nav::-webkit-scrollbar {
  width: 5px;
}

.tool-nav::-webkit-scrollbar-thumb {
  background: var(--ttl-border);
  border-radius: 0;
}

.tool-nav__group {
  margin-bottom: 1.1rem;
}

.tool-nav__group--room-hub {
  padding: 0.3rem;
  border: 1px solid var(--ttl-border);
  border-radius: 0;
  background: var(--ttl-header);
}

.tool-nav__group--section {
  margin-bottom: 1.25rem;
}

.tool-nav__section-title {
  padding: 0.35rem 0.65rem 0.2rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.tool-nav__section-hint {
  margin: 0 0.65rem 0.5rem;
  font-size: 0.72rem;
  line-height: 1.42;
  color: var(--text-faint);
}

.tool-nav__categories {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.tool-nav__group--nested .tool-nav__label {
  padding-left: 0.85rem;
  font-size: 0.68rem;
}

.tool-nav__label {
  padding: 0 0.55rem 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.tool-nav__link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  width: 100%;
  padding: 0.4rem 0.6rem;
  margin-bottom: 0.1rem;
  border: 1px solid transparent;
  border-radius: 0;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition:
    background var(--dur-fast) var(--ease-out),
    color var(--dur-fast) var(--ease-out);
}

.tool-nav__link:hover {
  background: var(--ttl-surface);
  color: var(--text);
}

.tool-nav__link.is-active {
  background: var(--ttl-surface-hover);
  color: var(--accent);
}

.tool-nav__group--room-hub .tool-nav__link {
  margin-bottom: 0.2rem;
  padding: 0.5rem 0.65rem;
  border-radius: 0;
  font-size: 0.88rem;
}

.tool-nav__group--room-hub .tool-nav__link:last-child {
  margin-bottom: 0;
}

.tool-nav__icon {
  display: flex;
  flex-shrink: 0;
  width: 1.2rem;
  height: 1.2rem;
  opacity: 0.85;
}

.tool-nav__icon svg {
  width: 100%;
  height: 100%;
}

.tool-nav__link.is-active .tool-nav__icon {
  opacity: 1;
}

.sidebar__foot {
  margin-top: auto;
  padding: 0.6rem 0.35rem 0;
  border-top: 1px solid var(--ttl-border);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  line-height: 1.45;
  color: var(--text-faint);
}

.sidebar__foot p {
  margin: 0;
}

.workspace {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
  min-width: 0;
  background: transparent;
}

.workspace__bar {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--ttl-border);
  background: var(--ttl-header);
  position: sticky;
  top: 0;
  z-index: 30;
}

.workspace__bar::before {
  content: "◉";
  color: var(--accent);
  font-size: 0.65rem;
  margin-top: 0.35rem;
}

.menu-toggle {
  display: none;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.workspace__heading {
  min-width: 0;
  flex: 1;
}

.site-version {
  margin-left: auto;
  align-self: flex-start;
  flex-shrink: 0;
  padding-top: 0.2rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--text-muted);
  user-select: none;
  pointer-events: none;
}

.workspace__heading h2 {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  line-height: 1.2;
  color: var(--text);
}

.workspace__desc {
  margin: 0.25rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.45;
}

.workspace__desc kbd {
  padding: 0.1em 0.4em;
  border-radius: 0;
  border: 1px solid var(--ttl-border);
  background: var(--ttl-surface);
  font-family: var(--font-mono);
  font-size: 0.85em;
}

.workspace__body {
  flex: 1;
  min-height: 0;
  padding: 1.25rem 1.35rem 2rem;
  overflow-y: auto;
  overflow-x: hidden;
}

.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 35;
  background: rgba(5, 5, 5, 0.5);
  opacity: 0;
  transition: opacity var(--dur) var(--ease-out);
}

.sidebar-backdrop.is-visible {
  opacity: 1;
}

@media (max-width: 900px) {
  .app {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: min(var(--sidebar-w), 88vw);
    transform: translateX(-100%);
    transition: transform var(--dur) var(--ease-out);
  }

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

  .menu-toggle {
    display: inline-flex;
  }

  .sidebar-backdrop:not([hidden]) {
    display: block;
  }
}