.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  background: var(--bg);
}

.app-main {
  min-width: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 50;
  padding: 0.65rem 1.25rem 0.35rem;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px);
}

.app-content {
  width: min(var(--feed-max), 100%);
  margin: 0 auto;
  padding: var(--space-4) 1.25rem var(--space-7);
}

.app-view-title {
  font-size: 1.4rem;
  margin-bottom: var(--space-4);
}

.feed {
  display: flex;
  flex-direction: column;
}

.feed-section__cards {
  display: flex;
  flex-direction: column;
}

.collection-list,
.attachment-list {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  margin-top: var(--space-4);
}

.collection-create {
  display: flex;
  gap: 0.55rem;
  margin-bottom: var(--space-3);
}

.collection-create .uk-input {
  flex: 1;
}

.collection-pill,
.collection-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: var(--radius-pill);
  padding: 0.45rem 0.85rem;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 180ms ease, color 180ms ease, border-color 180ms ease;
}

.collection-pill {
  width: 100%;
  justify-content: space-between;
}

.collection-pill:hover,
.collection-chip:hover {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 30%, var(--border));
}

.attachment-row {
  display: block;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
  transition: background 180ms ease, transform 180ms ease;
}

.attachment-row:hover {
  background: var(--surface-2);
  transform: translateY(-1px);
}

.note-card__collections {
  margin-bottom: var(--space-2);
}

kbd {
  font-family: inherit;
  font-size: 0.8em;
  padding: 0.1em 0.35em;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--surface-2);
}

.login-screen {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: var(--space-5);
  background:
    radial-gradient(720px 360px at 50% -8%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 60%),
    var(--bg);
}

.login-card {
  width: min(400px, 100%);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  padding: 1.4rem;
}

.login-card label {
  display: block;
  margin-bottom: var(--space-3);
  color: var(--text-muted);
  font-size: 0.85rem;
}

.login-card input {
  width: 100%;
  margin-top: 0.35rem;
}

.mobile-menu-btn {
  display: none;
  margin-bottom: var(--space-3);
}

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

  .app-shell > .sidebar-slot {
    display: none;
  }

  .mobile-menu-btn {
    display: inline-flex;
  }
}