.tool-phase-nav {
  position: sticky;
  top: 12px;
  z-index: 20;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 7px;
  margin: 16px 0;
  padding: 7px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 14px;
  background: rgba(3, 7, 18, 0.95);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(16px);
}

.tool-phase-tab {
  min-height: 46px;
  border: 1px solid transparent;
  border-radius: 9px;
  padding: 9px 10px;
  background: transparent;
  color: #94a3b8;
  font-weight: 900;
  text-align: center;
}

.tool-phase-tab:hover {
  border-color: rgba(148, 163, 184, 0.22);
  background: rgba(255, 255, 255, 0.05);
  color: #e2e8f0;
}

.tool-phase-tab.active {
  border-color: rgba(56, 189, 248, 0.34);
  background: rgba(56, 189, 248, 0.12);
  color: #e0f2fe;
  box-shadow: inset 0 3px 0 #38bdf8;
}

.tool-view-heading {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
  margin-bottom: 14px;
  padding: 18px 20px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 14px;
  background: rgba(15, 23, 42, 0.86);
}

.tool-view-heading h2 {
  margin: 0;
  color: #f8fafc;
  font-size: 1.2rem;
}

.tool-view-heading p {
  margin: 5px 0 0;
  color: #94a3b8;
  font-size: 0.88rem;
  line-height: 1.45;
}

.tool-switch {
  position: relative;
}

.tool-switch summary {
  cursor: pointer;
  min-height: 42px;
  border: 1px solid rgba(148, 163, 184, 0.24);
  border-radius: 9px;
  padding: 10px 12px;
  color: #cbd5e1;
  font-size: 0.82rem;
  font-weight: 900;
  list-style: none;
  white-space: nowrap;
}

.tool-switch summary::-webkit-details-marker {
  display: none;
}

.tool-switch-menu {
  position: absolute;
  top: calc(100% + 7px);
  right: 0;
  z-index: 25;
  display: grid;
  width: 210px;
  gap: 5px;
  padding: 8px;
  border: 1px solid rgba(148, 163, 184, 0.24);
  border-radius: 10px;
  background: #0f172a;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.42);
}

.tool-switch-menu a {
  border-radius: 7px;
  padding: 10px 11px;
  color: #cbd5e1;
  font-size: 0.82rem;
  font-weight: 800;
  text-decoration: none;
}

.tool-switch-menu a:hover {
  background: rgba(56, 189, 248, 0.1);
  color: #e0f2fe;
}

.tool-overview-page,
.tool-info-page {
  display: grid;
  gap: 16px;
  padding: 22px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 18px;
  background: rgba(15, 23, 42, 0.82);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.2);
}

.tool-overview-page h2,
.tool-info-page h2 {
  margin: 0;
  color: #f8fafc;
  font-size: clamp(1.35rem, 3vw, 1.8rem);
}

.tool-overview-page > p,
.tool-info-page > p {
  max-width: 760px;
  margin: 0;
  color: #94a3b8;
  line-height: 1.65;
}

.tool-overview-actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 11px;
}

.tool-overview-action {
  display: grid;
  align-content: start;
  gap: 7px;
  min-height: 128px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 10px;
  padding: 17px;
  background: rgba(2, 6, 23, 0.38);
  color: #f8fafc;
  text-align: left;
}

.tool-overview-action:hover {
  border-color: rgba(56, 189, 248, 0.4);
  background: rgba(56, 189, 248, 0.09);
}

.tool-overview-action strong {
  font-size: 0.98rem;
}

.tool-overview-action span {
  color: #94a3b8;
  font-size: 0.82rem;
  line-height: 1.45;
}

.tool-info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.tool-info-card {
  padding: 17px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 10px;
  background: rgba(2, 6, 23, 0.38);
}

.tool-info-card h3 {
  margin: 0 0 7px;
  color: #f8fafc;
}

.tool-info-card p {
  margin: 0;
  color: #94a3b8;
  font-size: 0.86rem;
  line-height: 1.55;
}

.tool-info-card .btn,
.tool-info-card button,
.tool-info-card a {
  margin-top: 13px;
}

.tool-workspace-hidden,
.tool-view-hidden {
  display: none !important;
}

.tool-mobile-nav {
  display: none;
}

body.tool-navigation-ready .page-head .quick-guide,
body.tool-navigation-ready .page-head .product-strip {
  display: none;
}

body.tool-navigation-ready .page-head {
  padding-bottom: 22px;
}

body.tool-navigation-ready .page-head p {
  max-width: 800px;
}

body.tool-navigation-ready .workspace {
  align-items: start;
}

body.tool-navigation-ready .side-stack > .mini-card {
  display: none;
}

body.tool-navigation-ready .toolbar .btn {
  min-height: 46px;
}

body.tool-navigation-ready input,
body.tool-navigation-ready select,
body.tool-navigation-ready textarea {
  min-height: 44px;
}

@media (max-width: 680px) {
  body.tool-navigation-ready {
    padding-bottom: 88px;
  }

  .tool-phase-nav {
    display: none;
  }

  .tool-view-heading {
    display: grid;
    align-items: start;
    padding: 15px;
  }

  .tool-switch {
    width: 100%;
  }

  .tool-switch summary {
    width: 100%;
    text-align: center;
  }

  .tool-switch-menu {
    right: auto;
    left: 0;
    width: 100%;
  }

  .tool-overview-page,
  .tool-info-page {
    padding: 17px;
    border-radius: 14px;
  }

  .tool-overview-actions,
  .tool-info-grid {
    grid-template-columns: 1fr;
  }

  .tool-overview-action {
    min-height: 102px;
  }

  .tool-mobile-nav {
    position: fixed;
    right: 7px;
    bottom: max(7px, env(safe-area-inset-bottom));
    left: 7px;
    z-index: 40;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 4px;
    padding: 7px;
    border: 1px solid rgba(148, 163, 184, 0.3);
    border-radius: 13px;
    background: rgba(3, 7, 18, 0.98);
    box-shadow: 0 22px 60px rgba(0, 0, 0, 0.48);
    backdrop-filter: blur(16px);
  }

  .tool-mobile-nav .tool-phase-tab {
    min-height: 54px;
    padding: 7px 3px;
    font-size: 0.68rem;
    line-height: 1.2;
  }

  body.tool-navigation-ready .page-head {
    margin-bottom: 12px;
    padding: 18px;
  }

  body.tool-navigation-ready .page-head h1 {
    font-size: clamp(1.8rem, 10vw, 2.5rem);
  }

  body.tool-navigation-ready .workspace {
    margin-top: 0;
  }

  body.tool-navigation-ready .panel,
  body.tool-navigation-ready .summary-card,
  body.tool-navigation-ready .section {
    border-radius: 14px;
  }

  body.tool-navigation-ready .toolbar {
    display: grid;
    grid-template-columns: 1fr;
  }

  body.tool-navigation-ready .toolbar .btn {
    width: 100%;
    min-height: 50px;
  }

  body.tool-navigation-ready #toolContent > .toolbar:not(.tool-view-hidden) {
    position: sticky;
    bottom: 74px;
    z-index: 15;
    padding: 8px;
    border: 1px solid rgba(148, 163, 184, 0.25);
    border-radius: 12px;
    background: rgba(3, 7, 18, 0.96);
    box-shadow: 0 -12px 30px rgba(0, 0, 0, 0.35);
  }
}

@media print {
  .tool-phase-nav,
  .tool-view-heading,
  .tool-overview-page,
  .tool-info-page,
  .tool-mobile-nav {
    display: none !important;
  }

  .tool-view-hidden {
    display: block !important;
  }
}