.n-intro-overlay {
  position: fixed;
  inset: 0;
  z-index: 10100;
  background: rgba(15, 23, 42, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  overflow-y: auto;
}
.theme-light .n-intro-overlay { background: rgba(15, 23, 42, 0.4); }
.n-intro-overlay.hidden { display: none; }

.n-intro-modal {
  width: 100%;
  max-width: 680px;
  background: var(--bg-elevated, #1a1d26);
  border: 1px solid rgba(255,255,255,0.09);
  border-radius: 16px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.theme-light .n-intro-modal {
  background: #fff;
  border-color: #e2e8f0;
}

/* inner padding wrapper (everything below the hero) */
.n-intro-modal > *:not(.n-intro-hero) {
  padding-left: 2.25rem;
  padding-right: 2.25rem;
}
.n-intro-modal > .n-intro-logos   { padding-top: 1.75rem; }
.n-intro-modal > .n-intro-title   { padding-top: 0.2rem; }
.n-intro-modal > .n-intro-lead    { padding-top: 0; }
.n-intro-modal > .n-intro-body    { padding-top: 0; }
.n-intro-modal > .n-intro-sensor-layout { padding-top: 0; }
.n-intro-modal > .n-intro-stats   { padding-top: 0; }
.n-intro-modal > .n-intro-footer  { padding-top: 0; padding-bottom: 1.5rem; }

/* spacing between sections */
.n-intro-logos          { margin-bottom: 0.9rem; }
.n-intro-title          { margin-bottom: 0.65rem; }
.n-intro-lead           { margin-bottom: 0.75rem; }
.n-intro-body           { margin-bottom: 0.6rem; }
.n-intro-sensor-layout  { margin-bottom: 0; }
.n-intro-stats          { margin-bottom: 0; }

/* hero image */
.n-intro-hero {
  width: 100%;
  line-height: 0;
  flex-shrink: 0;
}
.n-intro-hero-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  object-position: center 40%;
  display: block;
}

/* logos */
.n-intro-logos {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 0.25rem;
}
.n-intro-logo--gis  { height: 40px; width: auto; }
.n-intro-logo-sep {
  width: 1px;
  height: 44px;
  background: rgba(255,255,255,0.18);
  flex-shrink: 0;
  align-self: center;
}
.theme-light .n-intro-logo-sep { background: #cbd5e1; }

/* ECL badge: icon + text block */
.n-intro-ecl-badge {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}
.n-intro-ecl-icon {
  height: 40px;
  width: auto;
  flex-shrink: 0;
}
.n-intro-ecl-text {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  line-height: 1.2;
}
.n-intro-ecl-name {
  font-size: 0.97rem;
  font-weight: 700;
  color: var(--text-primary, #e8eaed);
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.theme-light .n-intro-ecl-name { color: #1e293b; }
.n-intro-ecl-sub {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-muted, #64748b);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}

/* dark/light icon switching */
.n-intro-logo--ecl-light          { display: none; }
.theme-light .n-intro-logo--ecl-dark  { display: none; }
.theme-light .n-intro-logo--ecl-light { display: block; }

/* title */
.n-intro-title {
  font-size: 1.45rem;
  font-weight: 640;
  line-height: 1.25;
  margin: 0;
  color: var(--text-primary, #e8eaed);
  letter-spacing: -0.015em;
}
.theme-light .n-intro-title { color: #0f172a; }

/* body text */
.n-intro-lead {
  font-size: 0.97rem;
  line-height: 1.6;
  color: var(--text-secondary, #94a3b8);
  margin: 0;
}
.n-intro-body {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--text-muted, #64748b);
  margin: 0;
}
.theme-light .n-intro-lead { color: #334155; }
.theme-light .n-intro-body { color: #475569; }

/* sensor layout: list left, map right */
.n-intro-sensor-layout {
  display: flex;
  gap: 1rem;
  align-items: stretch;
}
.n-intro-network-img {
  width: 200px;
  flex-shrink: 0;
  border-radius: 10px;
  object-fit: cover;
  border: 1px solid rgba(0,0,0,0.07);
}
.theme-light .n-intro-network-img { border-color: #e2e8f0; }

/* sensor list */
.n-intro-sensors {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 1rem 1.1rem;
  background: rgba(0,0,0,0.2);
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.06);
}
.theme-light .n-intro-sensors {
  background: #f8fafc;
  border-color: #e2e8f0;
}
.n-intro-sensor {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}
.n-intro-sensor-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 5px;
}
.n-intro-sensor > div {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.n-intro-sensor strong {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary, #e8eaed);
}
.theme-light .n-intro-sensor strong { color: #0f172a; }
.n-intro-sensor span {
  font-size: 0.78rem;
  color: var(--text-muted, #64748b);
}
.n-intro-sensor-vars {
  font-size: 0.75rem !important;
  color: var(--text-muted, #475569) !important;
  opacity: 0.75;
  letter-spacing: 0.01em;
}

/* stats strip */
.n-intro-stats {
  display: flex;
  gap: 0;
  border-top: 1px solid rgba(255,255,255,0.07);
  border-bottom: 1px solid rgba(255,255,255,0.07);
  padding: 0.9rem 0;
}
.theme-light .n-intro-stats {
  border-color: #e2e8f0;
}
.n-intro-stat {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  text-align: center;
}
.n-intro-stat + .n-intro-stat {
  border-left: 1px solid rgba(255,255,255,0.07);
}
.theme-light .n-intro-stat + .n-intro-stat { border-color: #e2e8f0; }
.n-intro-stat-val {
  font-size: 1.2rem;
  font-weight: 650;
  color: var(--text-primary, #e8eaed);
  letter-spacing: -0.02em;
}
.theme-light .n-intro-stat-val { color: #0f172a; }
.n-intro-stat span:last-child {
  font-size: 0.72rem;
  color: var(--text-muted, #64748b);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* footer row */
.n-intro-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.25rem;
}
.n-intro-skip-label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--text-muted, #64748b);
  cursor: pointer;
  user-select: none;
}
.n-intro-enter {
  padding: 0.55rem 1.5rem;
  border-radius: 8px;
  border: none;
  background: var(--accent, #3b82f6);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: opacity 0.15s;
}
.n-intro-enter:hover { opacity: 0.88; }

@media (max-width: 580px) {
  .n-intro-modal > *:not(.n-intro-hero) { padding-left: 1.25rem; padding-right: 1.25rem; }
  .n-intro-hero-img { height: 130px; }
  .n-intro-title { font-size: 1.15rem; }
  .n-intro-sensor-layout { flex-direction: column; }
  .n-intro-network-img { width: 100%; height: 160px; }
  .n-intro-stats { flex-direction: column; gap: 0.5rem; }
  .n-intro-stat + .n-intro-stat { border-left: none; border-top: 1px solid rgba(255,255,255,0.07); padding-top: 0.5rem; }
}