/* SCOPED STYLING FOR TOOLNTIP VLAN DESIGNER v2.2.0 */
.toolntip-vlan-designer {
  --tt-navy: #0B1D33;
  --tt-deep-blue: #102C49;
  --tt-white: #FFFFFF;
  --tt-soft-surface: #F8FAFC;
  --tt-border: #E2E8F0;
  --tt-muted: #64748B;
  --tt-gold: #FFB800;
  --tt-success: #16A34A;
  --tt-danger: #DC2626;
  --tt-interactive: #2563EB;
  --tt-interactive-hover: #1D4ED8;
  
  font-family: 'Segoe UI', Inter, Arial, sans-serif;
  color: var(--tt-navy);
  background-color: var(--tt-soft-surface);
  padding: 24px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(11, 29, 51, 0.08);
  box-sizing: border-box;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  line-height: 1.5;
}

.toolntip-vlan-designer *, .toolntip-vlan-designer *::before, .toolntip-vlan-designer *::after {
  box-sizing: border-box;
}

/* SCREENS */
.toolntip-vlan-designer .tt-screen {
  display: none;
}
.toolntip-vlan-designer .tt-screen.tt-active-screen {
  display: block;
  animation: ttFadeIn 0.3s ease-in-out;
}

@keyframes ttFadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* SPLASH SCREEN */
.toolntip-vlan-designer .tt-splash-container {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
  padding: 20px 0;
}
.toolntip-vlan-designer .tt-brand-badge {
  display: inline-block;
  background-color: rgba(37, 99, 235, 0.1);
  color: var(--tt-interactive);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 6px 14px;
  border-radius: 20px;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.toolntip-vlan-designer .tt-splash-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--tt-navy);
  margin: 0 0 12px 0;
  letter-spacing: -0.5px;
}
.toolntip-vlan-designer .tt-splash-subtitle {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--tt-deep-blue);
  margin-bottom: 20px;
}
.toolntip-vlan-designer .tt-splash-desc {
  font-size: 1rem;
  color: var(--tt-muted);
  max-width: 760px;
  margin: 0 auto 32px auto;
  line-height: 1.6;
}
.toolntip-vlan-designer .tt-splash-cta-wrap {
  margin-bottom: 40px;
}
.toolntip-vlan-designer .tt-splash-steps {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.toolntip-vlan-designer .tt-step-pill {
  background: var(--tt-white);
  border: 1px solid var(--tt-border);
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--tt-navy);
  display: flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.02);
}
.toolntip-vlan-designer .tt-step-pill span {
  background: var(--tt-interactive);
  color: var(--tt-white);
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
}
.toolntip-vlan-designer .tt-splash-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  text-align: left;
  margin-bottom: 32px;
}
.toolntip-vlan-designer .tt-splash-card {
  background: var(--tt-white);
  border: 1px solid var(--tt-border);
  border-radius: 10px;
  padding: 24px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.02);
}
.toolntip-vlan-designer .tt-splash-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--tt-navy);
  margin-top: 0;
  margin-bottom: 12px;
}
.toolntip-vlan-designer .tt-splash-card p {
  font-size: 0.92rem;
  color: var(--tt-muted);
  margin-bottom: 12px;
}
.toolntip-vlan-designer .tt-splash-card ul {
  margin: 0 0 12px 20px;
  padding: 0;
  font-size: 0.92rem;
  color: var(--tt-navy);
}
.toolntip-vlan-designer .tt-splash-card ul li {
  margin-bottom: 6px;
}
.toolntip-vlan-designer .tt-sub-note {
  font-size: 0.85rem;
  color: var(--tt-muted);
  font-style: italic;
  margin: 0;
}
.toolntip-vlan-designer .tt-security-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--tt-success);
  background: rgba(22, 163, 74, 0.08);
  padding: 6px 12px;
  border-radius: 6px;
  margin-top: 12px;
}
.toolntip-vlan-designer .tt-disclaimer-banner {
  background: rgba(255, 184, 0, 0.1);
  border: 1px solid rgba(255, 184, 0, 0.3);
  padding: 14px 20px;
  border-radius: 8px;
  font-size: 0.88rem;
  color: #713F12;
  text-align: left;
}

/* WIZARD HEADER & STEPS */
.toolntip-vlan-designer .tt-wizard-header {
  margin-bottom: 24px;
  background: var(--tt-white);
  padding: 16px 24px;
  border-radius: 8px;
  border: 1px solid var(--tt-border);
}
.toolntip-vlan-designer .tt-wizard-progress-bar {
  height: 6px;
  background: var(--tt-border);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 10px;
}
.toolntip-vlan-designer .tt-progress-fill {
  height: 100%;
  background: var(--tt-interactive);
  transition: width 0.3s ease;
}
.toolntip-vlan-designer .tt-wizard-steps-indicator {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--tt-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.toolntip-vlan-designer .tt-wizard-body {
  background: var(--tt-white);
  border: 1px solid var(--tt-border);
  border-radius: 10px;
  padding: 32px;
  margin-bottom: 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.02);
}
.toolntip-vlan-designer .tt-wizard-step h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--tt-navy);
  margin-top: 0;
  margin-bottom: 8px;
}
.toolntip-vlan-designer .tt-step-desc {
  font-size: 0.95rem;
  color: var(--tt-muted);
  margin-bottom: 24px;
}
.toolntip-vlan-designer .tt-wizard-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.toolntip-vlan-designer .tt-spacer {
  flex: 1;
}

/* FORM CONTROLS */
.toolntip-vlan-designer .tt-form-group {
  margin-bottom: 20px;
}
.toolntip-vlan-designer .tt-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.toolntip-vlan-designer label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--tt-navy);
  margin-bottom: 6px;
}
.toolntip-vlan-designer .tt-input,
.toolntip-vlan-designer .tt-select,
.toolntip-vlan-designer .tt-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--tt-border);
  border-radius: 6px;
  font-size: 0.92rem;
  color: var(--tt-navy);
  background: var(--tt-white);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.toolntip-vlan-designer .tt-input:focus,
.toolntip-vlan-designer .tt-select:focus,
.toolntip-vlan-designer .tt-textarea:focus {
  outline: none;
  border-color: var(--tt-interactive);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
.toolntip-vlan-designer .tt-field-hint {
  display: block;
  font-size: 0.8rem;
  color: var(--tt-muted);
  margin-top: 4px;
}
.toolntip-vlan-designer .tt-checkbox-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  cursor: pointer;
}
.toolntip-vlan-designer .tt-checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--tt-interactive);
  cursor: pointer;
}

/* BUTTONS */
.toolntip-vlan-designer .tt-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  transition: background-color 0.2s, transform 0.1s;
  text-decoration: none;
}
.toolntip-vlan-designer .tt-btn:active {
  transform: scale(0.98);
}
.toolntip-vlan-designer .tt-btn-primary {
  background-color: var(--tt-interactive);
  color: var(--tt-white);
}
.toolntip-vlan-designer .tt-btn-primary:hover {
  background-color: var(--tt-interactive-hover);
}
.toolntip-vlan-designer .tt-btn-secondary {
  background-color: var(--tt-white);
  color: var(--tt-navy);
  border: 1px solid var(--tt-border);
}
.toolntip-vlan-designer .tt-btn-secondary:hover {
  background-color: var(--tt-soft-surface);
  border-color: var(--tt-muted);
}
.toolntip-vlan-designer .tt-btn-success {
  background-color: var(--tt-success);
  color: var(--tt-white);
}
.toolntip-vlan-designer .tt-btn-success:hover {
  background-color: #15803D;
}
.toolntip-vlan-designer .tt-btn-danger {
  background-color: var(--tt-danger);
  color: var(--tt-white);
}
.toolntip-vlan-designer .tt-btn-danger:hover {
  background-color: #B91C1C;
}
.toolntip-vlan-designer .tt-btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
}
.toolntip-vlan-designer .tt-btn-lg {
  padding: 14px 28px;
  font-size: 1.05rem;
}

/* RADIO CARDS */
.toolntip-vlan-designer .tt-radio-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 20px;
}
.toolntip-vlan-designer .tt-radio-card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--tt-white);
  border: 1px solid var(--tt-border);
  padding: 16px;
  border-radius: 8px;
  cursor: pointer;
  transition: border-color 0.2s, background-color 0.2s;
}
.toolntip-vlan-designer .tt-radio-card:hover {
  border-color: var(--tt-interactive);
}
.toolntip-vlan-designer .tt-radio-card input[type="radio"] {
  margin-top: 3px;
  accent-color: var(--tt-interactive);
}
.toolntip-vlan-designer .tt-radio-content strong {
  display: block;
  font-size: 0.95rem;
  color: var(--tt-navy);
  margin-bottom: 4px;
}
.toolntip-vlan-designer .tt-radio-content p {
  font-size: 0.88rem;
  color: var(--tt-muted);
  margin: 0;
}

/* SEGMENT CARDS (STEP 2) */
.toolntip-vlan-designer .tt-segments-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 24px;
}
.toolntip-vlan-designer .tt-segment-card {
  background: var(--tt-white);
  border: 1px solid var(--tt-border);
  border-radius: 8px;
  padding: 16px;
  transition: border-color 0.2s;
}
.toolntip-vlan-designer .tt-segment-card.tt-segment-active {
  border-color: var(--tt-interactive);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.05);
}
.toolntip-vlan-designer .tt-segment-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.toolntip-vlan-designer .tt-segment-config {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--tt-border);
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
  align-items: flex-end;
}
.toolntip-vlan-designer .tt-custom-segments-section {
  border-top: 1px solid var(--tt-border);
  padding-top: 24px;
  margin-top: 24px;
}
.toolntip-vlan-designer .tt-custom-segment-row {
  background: var(--tt-white);
  border: 1px solid var(--tt-border);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 12px;
  display: grid;
  grid-template-columns: 2fr 1.5fr 1.5fr auto;
  gap: 16px;
  align-items: flex-end;
}

/* RESULTS & DASHBOARD */
.toolntip-vlan-designer .tt-results-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 20px;
  background: var(--tt-white);
  padding: 24px;
  border-radius: 8px;
  border: 1px solid var(--tt-border);
}
.toolntip-vlan-designer .tt-results-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--tt-navy);
  margin: 0 0 6px 0;
}
.toolntip-vlan-designer .tt-results-sub {
  font-size: 0.92rem;
  color: var(--tt-muted);
  margin: 0;
}
.toolntip-vlan-designer .tt-results-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

/* NETWORK SUMMARY METRICS CARD */
.toolntip-vlan-designer .tt-network-summary-card {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  background: var(--tt-white);
  border: 1px solid var(--tt-border);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.02);
}
.toolntip-vlan-designer .tt-summary-metric {
  text-align: center;
  padding: 10px;
  background: var(--tt-soft-surface);
  border-radius: 6px;
  border: 1px solid var(--tt-border);
}
.toolntip-vlan-designer .tt-metric-value {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--tt-interactive);
  margin-bottom: 4px;
  font-family: monospace;
}
.toolntip-vlan-designer .tt-metric-label {
  font-size: 0.8rem;
  color: var(--tt-muted);
  font-weight: 600;
  text-transform: uppercase;
}

/* GRAPH CONTAINER */
.toolntip-vlan-designer .tt-graph-container {
  background: var(--tt-white);
  border: 1px solid var(--tt-border);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.02);
}
.toolntip-vlan-designer .tt-graph-container h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--tt-navy);
  margin: 0 0 6px 0;
}
.toolntip-vlan-designer .tt-bar-graph {
  display: flex;
  height: 32px;
  border-radius: 6px;
  overflow: hidden;
  background: var(--tt-border);
  gap: 2px;
  margin: 16px 0 12px 0;
}
.toolntip-vlan-designer .tt-bar-segment {
  height: 100%;
  transition: width 0.4s ease;
  cursor: pointer;
  position: relative;
}
.toolntip-vlan-designer .tt-bar-segment:hover {
  opacity: 0.85;
}
.toolntip-vlan-designer .tt-graph-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.82rem;
  color: var(--tt-muted);
}
.toolntip-vlan-designer .tt-legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  color: var(--tt-navy);
}
.toolntip-vlan-designer .tt-legend-color {
  width: 12px;
  height: 12px;
  border-radius: 3px;
}

/* VALIDATION BANNER */
.toolntip-vlan-designer .tt-validation-banner {
  display: flex;
  align-items: center;
  gap: 14px;
  background: rgba(22, 163, 74, 0.1);
  border: 1px solid rgba(22, 163, 74, 0.3);
  padding: 14px 20px;
  border-radius: 8px;
  margin-bottom: 20px;
  color: #14532D;
  font-weight: 600;
  font-size: 0.92rem;
}
.toolntip-vlan-designer .tt-validation-banner.tt-error {
  background: rgba(220, 38, 38, 0.1);
  border-color: rgba(220, 38, 38, 0.3);
  color: #7F1D1D;
}
.toolntip-vlan-designer .tt-validation-icon {
  font-size: 1.2rem;
}
.toolntip-vlan-designer .tt-validation-text {
  flex: 1;
}
.toolntip-vlan-designer .tt-close-banner {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: inherit;
  opacity: 0.7;
}
.toolntip-vlan-designer .tt-close-banner:hover {
  opacity: 1;
}

/* TABS */
.toolntip-vlan-designer .tt-tabs-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--tt-border);
  padding-bottom: 8px;
}
.toolntip-vlan-designer .tt-tab-btn {
  background: none;
  border: none;
  padding: 10px 18px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--tt-muted);
  cursor: pointer;
  border-radius: 6px;
  transition: background-color 0.2s, color 0.2s;
}
.toolntip-vlan-designer .tt-tab-btn:hover {
  color: var(--tt-navy);
  background: var(--tt-white);
}
.toolntip-vlan-designer .tt-tab-btn.tt-active {
  color: var(--tt-interactive);
  background: var(--tt-white);
  box-shadow: 0 2px 6px rgba(0,0,0,0.04);
  border: 1px solid var(--tt-border);
}
.toolntip-vlan-designer .tt-tab-content {
  display: none;
}
.toolntip-vlan-designer .tt-tab-content.tt-active {
  display: block;
}

/* TABLES */
.toolntip-vlan-designer .tt-table-responsive {
  background: var(--tt-white);
  border: 1px solid var(--tt-border);
  border-radius: 8px;
  overflow-x: auto;
}
.toolntip-vlan-designer .tt-vlan-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.88rem;
}
.toolntip-vlan-designer .tt-vlan-table th {
  background: var(--tt-soft-surface);
  color: var(--tt-navy);
  font-weight: 700;
  padding: 14px 16px;
  border-bottom: 1px solid var(--tt-border);
}
.toolntip-vlan-designer .tt-vlan-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--tt-border);
  color: var(--tt-navy);
}
.toolntip-vlan-designer .tt-vlan-table tr:last-child td {
  border-bottom: none;
}
.toolntip-vlan-designer .tt-vlan-badge {
  display: inline-block;
  background: var(--tt-soft-surface);
  border: 1px solid var(--tt-border);
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 700;
  font-family: monospace;
}

/* CARDS GRID */
.toolntip-vlan-designer .tt-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}
.toolntip-vlan-designer .tt-vlan-card {
  background: var(--tt-white);
  border: 1px solid var(--tt-border);
  border-radius: 8px;
  padding: 20px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.02);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.toolntip-vlan-designer .tt-vlan-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--tt-border);
  padding-bottom: 12px;
}
.toolntip-vlan-designer .tt-vlan-card-title h4 {
  margin: 0 0 4px 0;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--tt-navy);
}
.toolntip-vlan-designer .tt-vlan-card-details {
  font-size: 0.88rem;
  color: var(--tt-muted);
  margin-bottom: 16px;
}
.toolntip-vlan-designer .tt-vlan-card-details div {
  display: flex;
  justify-content: space-between;
  margin-bottom: 6px;
}
.toolntip-vlan-designer .tt-vlan-card-details span.val {
  font-weight: 600;
  color: var(--tt-navy);
  font-family: monospace;
}
.toolntip-vlan-designer .tt-vlan-card-footer {
  border-top: 1px solid var(--tt-border);
  padding-top: 12px;
  font-size: 0.8rem;
  color: var(--tt-muted);
  font-style: italic;
}

/* ADVANCED EDITOR */
.toolntip-vlan-designer .tt-advanced-toolbar {
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.toolntip-vlan-designer .tt-advanced-row {
  background: var(--tt-white);
  border: 1px solid var(--tt-border);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 12px;
  display: grid;
  grid-template-columns: 80px 1.5fr 1.5fr 1fr 1fr auto;
  gap: 12px;
  align-items: center;
}

/* DROPDOWN */
.toolntip-vlan-designer .tt-dropdown {
  position: relative;
  display: inline-block;
}
.toolntip-vlan-designer .tt-dropdown-content {
  display: none;
  position: absolute;
  right: 0;
  background-color: var(--tt-white);
  min-width: 220px;
  box-shadow: 0 8px 16px rgba(0,0,0,0.1);
  border: 1px solid var(--tt-border);
  border-radius: 6px;
  z-index: 10;
  overflow: hidden;
}
.toolntip-vlan-designer .tt-dropdown-content.tt-show {
  display: block;
}
.toolntip-vlan-designer .tt-dropdown-content a {
  color: var(--tt-navy);
  padding: 10px 16px;
  text-decoration: none;
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
}
.toolntip-vlan-designer .tt-dropdown-content a:hover {
  background-color: var(--tt-soft-surface);
  color: var(--tt-interactive);
}

/* MODAL */
.toolntip-vlan-designer .tt-modal-backdrop {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(11, 29, 51, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(2px);
}
.toolntip-vlan-designer .tt-modal {
  background: var(--tt-white);
  border-radius: 10px;
  width: 100%;
  max-width: 650px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  overflow: hidden;
  animation: ttFadeIn 0.2s ease-out;
}
.toolntip-vlan-designer .tt-modal-header {
  background: var(--tt-soft-surface);
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--tt-border);
}
.toolntip-vlan-designer .tt-modal-header h3 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--tt-navy);
}
.toolntip-vlan-designer .tt-close-modal {
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--tt-muted);
}
.toolntip-vlan-designer .tt-close-modal:hover {
  color: var(--tt-navy);
}
.toolntip-vlan-designer .tt-modal-body {
  padding: 20px;
  max-height: 75vh;
  overflow-y: auto;
}
.toolntip-vlan-designer .tt-modal-footer {
  background: var(--tt-soft-surface);
  padding: 14px 20px;
  border-top: 1px solid var(--tt-border);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* SUMMARY BOX */
.toolntip-vlan-designer .tt-summary-box {
  background: var(--tt-soft-surface);
  border: 1px solid var(--tt-border);
  border-radius: 8px;
  padding: 20px;
}
.toolntip-vlan-designer .tt-summary-item {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--tt-border);
  font-size: 0.9rem;
}
.toolntip-vlan-designer .tt-summary-item:last-child {
  border-bottom: none;
}

/* RESPONSIVE DESIGN */
@media (max-width: 768px) {
  .toolntip-vlan-designer .tt-splash-grid,
  .toolntip-vlan-designer .tt-form-row,
  .toolntip-vlan-designer .tt-segment-config,
  .toolntip-vlan-designer .tt-custom-segment-row,
  .toolntip-vlan-designer .tt-advanced-row {
    grid-template-columns: 1fr;
  }
  .toolntip-vlan-designer .tt-results-header {
    flex-direction: column;
    gap: 16px;
  }
  .toolntip-vlan-designer .tt-results-actions {
    width: 100%;
    flex-wrap: wrap;
  }
}

/* Inline copy feedback: avoids disruptive browser alert dialogs. */
.toolntip-vlan-designer .tt-dropdown-content a.tt-copy-success {
  font-weight: 700;
}

/* WEB-007.8 8.1.4 inline required-field validation */
.toolntip-vlan-designer .tt-input.tt-input-error,
.toolntip-vlan-designer .tt-select.tt-input-error,
.toolntip-vlan-designer .tt-textarea.tt-input-error {
  border-color: #dc2626;
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.10);
}
.toolntip-vlan-designer .tt-field-error {
  display: block;
  margin-top: 6px;
  color: #b91c1c;
  font-size: 0.8rem;
  font-weight: 600;
}
.toolntip-vlan-designer .tt-field-error::before {
  content: "! ";
  font-weight: 800;
}

/* v1.0.1: Wizard step navigation viewport target. */
.toolntip-vlan-designer .tt-wizard-steps-indicator {
  scroll-margin-top: 96px;
}