.nav3d-shell {
  display: grid;
  gap: 16px;
}

.nav3d-layout {
  display: grid;
  grid-template-columns: minmax(220px, 260px) minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.nav3d-sidebar {
  border: 1px solid rgba(113, 153, 196, 0.24);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(242, 248, 255, 0.96));
  box-shadow: 0 18px 32px -28px rgba(7, 37, 72, 0.58);
  padding: 10px;
  position: sticky;
  top: 14px;
  max-height: calc(100vh - 30px);
  overflow: auto;
}

.nav3d-group {
  border: 1px solid rgba(119, 160, 201, 0.2);
  border-radius: 14px;
  margin-bottom: 10px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.7);
}

.nav3d-group:last-child {
  margin-bottom: 0;
}

.nav3d-sidebar .nav3d-group-toggle {
  width: 100%;
  border: 0;
  text-align: left;
  background: linear-gradient(120deg, rgba(226, 239, 255, 0.96), rgba(245, 250, 255, 0.96));
  color: #244d7f;
  font-weight: 800;
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 11px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.nav3d-sidebar .nav3d-group-toggle::before {
  content: none;
  display: none;
}

.nav3d-group-chevron {
  width: 9px;
  height: 9px;
  border-right: 2px solid rgba(45, 85, 124, 0.76);
  border-bottom: 2px solid rgba(45, 85, 124, 0.76);
  transform: rotate(45deg);
  transition: transform 0.2s ease;
}

.nav3d-group.is-expanded .nav3d-group-chevron {
  transform: rotate(225deg);
}

.nav3d-group-body {
  display: none;
  padding: 8px;
  background: rgba(248, 252, 255, 0.94);
}

.nav3d-group.is-expanded .nav3d-group-body {
  display: grid;
  gap: 7px;
}

.nav3d-sidebar .nav3d-node {
  width: 100%;
  display: block;
  border: 1px solid rgba(120, 168, 218, 0.28);
  border-radius: 12px;
  background: #fff;
  color: #174a81;
  font: inherit;
  font-weight: 700;
  font-size: 13px;
  text-align: left;
  padding: 10px 12px;
  cursor: pointer;
  transition: transform 0.16s ease, box-shadow 0.16s ease, border-color 0.16s ease;
}

.nav3d-sidebar .nav3d-node::before {
  content: none;
  display: none;
}

.nav3d-sidebar .nav3d-node:hover,
.nav3d-sidebar .nav3d-node:focus-visible {
  border-color: rgba(53, 124, 202, 0.45);
  box-shadow: 0 8px 18px -14px rgba(17, 71, 128, 0.62);
  transform: translateX(2px);
}

.nav3d-sidebar .nav3d-node.is-active {
  border-color: rgba(43, 136, 240, 0.64);
  color: #fff;
  background: linear-gradient(130deg, #1d7ff8, #35bbff);
  box-shadow: 0 12px 22px -16px rgba(29, 118, 222, 0.84);
}

.nav3d-context {
  border: 1px solid rgba(113, 153, 196, 0.22);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(253, 254, 255, 0.98), rgba(244, 249, 255, 0.95));
  box-shadow: 0 18px 32px -28px rgba(7, 37, 72, 0.45);
  padding: 16px;
  display: grid;
  gap: 10px;
}

.nav3d-breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  color: #496d93;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.nav3d-crumb-root {
  color: #1f5488;
}

.nav3d-crumb-sep {
  color: #82a3c5;
}

.nav3d-context-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.nav3d-context-head h3 {
  margin: 0;
  color: #153f6f;
  font-size: 24px;
  line-height: 1.2;
}

.nav3d-context-head p {
  margin: 6px 0 0;
  color: #5f80a4;
  font-size: 14px;
}

.nav3d-mode-tabs,
.nav3d-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.nav3d-mode-tabs:empty {
  display: none;
}

.nav3d-mode-chip,
.nav3d-action-chip {
  border-radius: 999px;
  border: 1px solid rgba(126, 167, 210, 0.32);
  background: rgba(255, 255, 255, 0.92);
  color: #225488;
  font: inherit;
  font-size: 12px;
  font-weight: 800;
  padding: 8px 12px;
  cursor: pointer;
}

.nav3d-mode-chip.is-active {
  background: linear-gradient(130deg, #1f85ff, #2fbaff);
  color: #fff;
  border-color: transparent;
}

.nav3d-action-empty {
  margin: 0;
  color: #6a87a7;
  font-size: 13px;
}

.nav3d-content {
  display: grid;
  gap: 14px;
}

.nav3d-hidden {
  display: none !important;
}

@media (max-width: 1100px) {
  .nav3d-layout {
    grid-template-columns: 1fr;
  }

  .nav3d-sidebar {
    position: relative;
    top: auto;
    max-height: none;
  }
}