/* ── Nashantoo Design System ── */
:root {
  --nasn-primary:       #3B82F6;
  --nasn-primary-dark:  #1D4ED8;
  --nasn-primary-light: #EFF6FF;
  --nasn-text:          #0F172A;
  --nasn-text-muted:    #475569;
  --nasn-muted:         #64748B;
  --nasn-border:        #E2E8F0;
  --nasn-surface:       #F8FAFC;
  --nasn-surface-low:   #F1F5F9;
  --nasn-white:         #ffffff;
  --nasn-black:         #0A0F1E;
  --nasn-gradient-btn:  linear-gradient(135deg, #3B82F6 0%, #1D4ED8 100%);
  --nasn-shadow-card:   0 4px 20px rgba(15,23,42,0.06);
  --nasn-shadow-ambient:0 12px 40px rgba(59,130,246,0.12);
  --nasn-radius-card:   1.5rem;
  --nasn-radius-btn:    0.75rem;
  --nasn-font-headline: 'Manrope', system-ui, sans-serif;
  --nasn-font-body:     'Inter', system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--nasn-font-body);
  color: var(--nasn-text);
  background: var(--nasn-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; }

/* ── Layout ── */
.nasn-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ── Header ── */
.nasn-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(226,232,240,0.7);
  box-shadow: 0 1px 3px rgba(15,23,42,0.04);
}
.nasn-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.875rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.nasn-site-title {
  font-family: var(--nasn-font-headline);
  font-weight: 800;
  font-size: 1.375rem;
  letter-spacing: -0.02em;
  color: var(--nasn-text);
}
.nasn-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nasn-nav a {
  font-family: var(--nasn-font-body);
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--nasn-text-muted);
  transition: color 0.15s;
}
.nasn-nav a:hover { color: var(--nasn-primary); }

.nasn-btn-primary-link {
  display: inline-block;
  background: var(--nasn-gradient-btn);
  color: #fff !important;
  border-radius: var(--nasn-radius-btn);
  padding: 0.625rem 1.375rem;
  font-family: var(--nasn-font-headline);
  font-weight: 700;
  font-size: 0.875rem;
  box-shadow: 0 4px 14px rgba(59,130,246,0.25);
  transition: box-shadow 0.2s, transform 0.1s;
}
.nasn-btn-primary-link:hover {
  box-shadow: 0 8px 25px rgba(59,130,246,0.38);
  transform: translateY(-1px);
}
.nasn-btn-outline-link {
  display: inline-block;
  background: transparent;
  color: var(--nasn-text) !important;
  border: 1.5px solid var(--nasn-border);
  border-radius: var(--nasn-radius-btn);
  padding: 0.625rem 1.375rem;
  font-family: var(--nasn-font-headline);
  font-weight: 700;
  font-size: 0.875rem;
  transition: all 0.15s;
}
.nasn-btn-outline-link:hover {
  background: var(--nasn-surface-low);
  border-color: #94a3b8;
}

.nasn-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nasn-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--nasn-text);
  border-radius: 2px;
  transition: 0.2s;
}

/* ── Hero ── */
.nasn-hero {
  background:
    radial-gradient(circle at 70% 40%, #EFF6FF 0%, transparent 50%),
    var(--nasn-surface);
  padding: 5rem 0;
  min-height: 88vh;
  display: flex;
  align-items: center;
}
.nasn-hero-grid {
  display: grid;
  grid-template-columns: 55% 1fr;
  gap: clamp(2rem,4vw,4rem);
  align-items: center;
}
.nasn-label-chip {
  display: inline-block;
  background: var(--nasn-primary-light);
  color: var(--nasn-primary-dark);
  font-family: var(--nasn-font-headline);
  font-weight: 700;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  padding: 0.375rem 0.875rem;
  border-radius: 9999px;
  margin-bottom: 1.5rem;
}
.nasn-display {
  font-family: var(--nasn-font-headline);
  font-weight: 800;
  font-size: clamp(2.25rem,4.5vw,3.75rem);
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--nasn-text);
  margin-bottom: 1.25rem;
}
.nasn-text-primary { color: var(--nasn-primary); }
.nasn-hero-desc {
  color: var(--nasn-text-muted);
  font-family: var(--nasn-font-body);
  font-size: 1.125rem;
  line-height: 1.75;
  max-width: 38rem;
  margin-bottom: 2rem;
}
.nasn-hero-btns {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.nasn-hero-visual { position: relative; }
.nasn-hero-card {
  position: relative;
  border-radius: 2.5rem;
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(59,130,246,0.12);
}
.nasn-hero-card img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}
.nasn-hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  pointer-events: none;
  z-index: 0;
}
.nasn-metric-card {
  position: absolute;
  bottom: 1.5rem;
  left: 1.5rem;
  right: 1.5rem;
  background: rgba(255,255,255,0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.6);
  border-radius: 1.25rem;
  padding: 1.25rem 1.5rem;
  box-shadow: 0 8px 32px rgba(15,23,42,0.08);
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  z-index: 2;
}
.nasn-metric-label {
  font-family: var(--nasn-font-headline);
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--nasn-primary);
  margin-bottom: 0.25rem;
}
.nasn-metric-value {
  font-family: var(--nasn-font-headline);
  font-size: 2rem;
  font-weight: 800;
  color: var(--nasn-text);
  line-height: 1;
}
.nasn-metric-unit { font-size: 0.875rem; font-weight: 500; color: var(--nasn-text-muted); }
.nasn-metric-trend { font-family: var(--nasn-font-headline); font-weight: 700; font-size: 0.9375rem; color: #10B981; }

/* ── Solutions ── */
.nasn-features-section {
  background: var(--nasn-white);
  padding: 5rem 0;
}
.nasn-section-label {
  font-family: var(--nasn-font-headline);
  font-weight: 700;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--nasn-primary);
  margin-bottom: 1rem;
}
.nasn-section-heading {
  font-family: var(--nasn-font-headline);
  font-weight: 800;
  font-size: clamp(1.75rem,3vw,2.5rem);
  color: var(--nasn-text);
  letter-spacing: -0.025em;
  margin-bottom: 1rem;
}
.nasn-section-sub {
  font-family: var(--nasn-font-body);
  font-size: 1.0625rem;
  color: var(--nasn-muted);
  line-height: 1.75;
  max-width: 58ch;
  margin-bottom: 3rem;
}

.nasn-cards-row {
  display: grid;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}
.nasn-cards-row--top { grid-template-columns: 2fr 1fr; }
.nasn-cards-row--bottom { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.nasn-feature-card {
  background: var(--nasn-white);
  border-radius: var(--nasn-radius-card);
  padding: 2rem;
  border: 1px solid var(--nasn-border);
  transition: box-shadow 0.2s, transform 0.2s;
}
.nasn-feature-card:hover {
  box-shadow: var(--nasn-shadow-ambient);
  transform: translateY(-4px);
}
.nasn-card-large { background: var(--nasn-surface-low); border-color: transparent; }
.nasn-card-accent {
  background: linear-gradient(145deg, var(--nasn-primary), #60A5FA);
  border-color: transparent;
  color: #fff;
}
.nasn-card-accent .nasn-icon-box { background: rgba(255,255,255,0.2); }
.nasn-card-accent .nasn-icon-box .material-symbols-outlined,
.nasn-card-accent .nasn-card-title,
.nasn-card-accent .nasn-card-desc { color: #fff !important; }
.nasn-icon-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: 0.875rem;
  background: var(--nasn-primary-light);
  margin-bottom: 1.25rem;
}
.nasn-icon-box .material-symbols-outlined {
  font-size: 1.375rem;
  color: var(--nasn-primary);
  font-variation-settings: 'FILL' 0,'wght' 400,'GRAD' 0,'opsz' 24;
}
.nasn-card-title {
  font-family: var(--nasn-font-headline);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--nasn-text);
  margin-bottom: 0.75rem;
}
.nasn-card-desc {
  font-family: var(--nasn-font-body);
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--nasn-text-muted);
}

/* ── Feature card arrow ── */
.nasn-feature-card--arrow { position: relative; overflow: hidden; }
.nasn-card-arrow {
  position: absolute;
  bottom: 1.5rem;
  right: 1.5rem;
  font-size: 1.25rem;
  color: var(--nasn-border);
  transition: color 0.2s, transform 0.25s cubic-bezier(.22,1,.36,1);
  font-variation-settings: 'FILL' 0,'wght' 300,'GRAD' 0,'opsz' 24;
}
.nasn-feature-card--arrow:hover .nasn-card-arrow {
  color: var(--nasn-primary);
  transform: translate(4px, -4px);
}

/* ── Use Cases ── */
.nasn-usecase-section { background: var(--nasn-surface); padding: 5rem 0; }
.nasn-usecase-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 2rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}
.nasn-usecase-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}
.nasn-usecase-card { cursor: pointer; }
.nasn-usecase-img-wrap {
  position: relative;
  height: 420px;
  border-radius: 2rem;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(15,23,42,0.08);
  transition: box-shadow 0.3s;
}
.nasn-usecase-img-wrap:hover { box-shadow: 0 16px 48px rgba(15,23,42,0.15); }
.nasn-usecase-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s cubic-bezier(.22,1,.36,1);
  display: block;
}
.nasn-usecase-img-wrap:hover .nasn-usecase-img { transform: scale(1.1); }
.nasn-usecase-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15,23,42,0.88) 0%, rgba(15,23,42,0.15) 55%, transparent 100%);
}
.nasn-usecase-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 2rem 1.75rem;
}
.nasn-usecase-title {
  font-family: var(--nasn-font-headline);
  font-weight: 700;
  font-size: 1.375rem;
  color: #fff;
  margin-bottom: 0;
}
.nasn-usecase-text {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.75);
  margin-top: 0.5rem;
  line-height: 1.55;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.35s, transform 0.35s cubic-bezier(.22,1,.36,1);
}
.nasn-usecase-img-wrap:hover .nasn-usecase-text {
  opacity: 1;
  transform: translateY(0);
}

/* ── Stats ── */
.nasn-stats-section {
  background: #0F172A;
  padding: 5rem 0;
}
.nasn-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}
.nasn-stat-number {
  font-family: var(--nasn-font-headline);
  font-weight: 800;
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  color: var(--nasn-primary);
  line-height: 1;
  margin-bottom: 0.625rem;
  letter-spacing: -0.02em;
}
.nasn-stat-label {
  font-family: var(--nasn-font-headline);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: rgba(255,255,255,0.45);
}

/* ── Blog ── */
.nasn-blog-section {
  background: var(--nasn-surface);
  padding: 5rem 0;
}
.nasn-posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px,1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}
.nasn-post-card {
  background: var(--nasn-white);
  border-radius: var(--nasn-radius-card);
  border: 1px solid var(--nasn-border);
  overflow: hidden;
  transition: box-shadow 0.2s, transform 0.2s;
}
.nasn-post-card:hover {
  box-shadow: var(--nasn-shadow-ambient);
  transform: translateY(-4px);
}
.nasn-post-img img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}
.nasn-post-body { padding: 1.5rem; }
.nasn-post-date {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--nasn-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 0.5rem;
}
.nasn-post-title {
  font-family: var(--nasn-font-headline);
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--nasn-text);
  margin-bottom: 0.5rem;
  line-height: 1.35;
}
.nasn-post-excerpt {
  font-size: 0.9rem;
  color: var(--nasn-text-muted);
  line-height: 1.65;
}

/* ── Contact ── */
.nasn-contact-section {
  background: linear-gradient(135deg, #0F172A 0%, #1E3A5F 100%);
  padding: 5rem 0;
}
.nasn-contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.nasn-contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.nasn-contact-form input,
.nasn-contact-form textarea {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 0.75rem;
  padding: 0.875rem 1.125rem;
  color: #fff;
  font-family: var(--nasn-font-body);
  font-size: 0.9375rem;
  outline: none;
  transition: border-color 0.15s;
}
.nasn-contact-form input::placeholder,
.nasn-contact-form textarea::placeholder { color: rgba(255,255,255,0.4); }
.nasn-contact-form input:focus,
.nasn-contact-form textarea:focus { border-color: var(--nasn-primary); }
.nasn-contact-form button {
  background: var(--nasn-gradient-btn);
  color: #fff;
  border: none;
  border-radius: var(--nasn-radius-btn);
  padding: 1rem;
  font-family: var(--nasn-font-headline);
  font-weight: 700;
  font-size: 0.9375rem;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(59,130,246,0.3);
  transition: box-shadow 0.2s, transform 0.1s;
}
.nasn-contact-form button:hover {
  box-shadow: 0 8px 25px rgba(59,130,246,0.45);
  transform: translateY(-1px);
}

/* ── Footer ── */
.nasn-footer {
  background: var(--nasn-black);
  color: rgba(255,255,255,0.7);
  padding: 4rem 0 0;
}
.nasn-footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.nasn-footer-brand {
  font-family: var(--nasn-font-headline);
  font-weight: 800;
  font-size: 1.25rem;
  color: #fff;
  margin-bottom: 1rem;
}
.nasn-footer-about { font-size: 0.9rem; line-height: 1.7; }
.nasn-footer-heading {
  font-family: var(--nasn-font-headline);
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--nasn-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1.25rem;
}
.nasn-footer-links { list-style: none; display: flex; flex-direction: column; gap: 0.75rem; }
.nasn-footer-links a { color: rgba(255,255,255,0.65); font-size: 0.9rem; transition: color 0.15s; }
.nasn-footer-links a:hover { color: #fff; }
.nasn-footer-contact { list-style: none; display: flex; flex-direction: column; gap: 0.75rem; }
.nasn-footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.875rem;
}
.nasn-footer-contact .material-symbols-outlined { font-size: 1rem; color: var(--nasn-primary); flex-shrink: 0; margin-top: 2px; }
.nasn-footer-bar {
  padding: 1.5rem 0;
  font-size: 0.8125rem;
  text-align: center;
  color: rgba(255,255,255,0.35);
}

/* ── Animations ── */
@keyframes nasn-fade-up {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes nasn-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes nasn-slide-right {
  from { opacity: 0; transform: translateX(-24px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes nasn-scale-in {
  from { opacity: 0; transform: scale(0.92); }
  to   { opacity: 1; transform: scale(1); }
}

/* Hero entrance (runs immediately on load) */
.nasn-label-chip  { animation: nasn-fade-up 0.55s cubic-bezier(.22,1,.36,1) both; }
.nasn-display     { animation: nasn-fade-up 0.65s 0.08s cubic-bezier(.22,1,.36,1) both; }
.nasn-hero-desc   { animation: nasn-fade-up 0.65s 0.16s cubic-bezier(.22,1,.36,1) both; }
.nasn-hero-btns   { animation: nasn-fade-up 0.65s 0.24s cubic-bezier(.22,1,.36,1) both; }
.nasn-hero-visual { animation: nasn-scale-in 0.8s 0.1s cubic-bezier(.22,1,.36,1) both; }

/* Header slide-down */
.nasn-header { animation: nasn-fade-in 0.4s ease both; }

/* Scroll-reveal base state — JS adds .nasn-visible to trigger */
.nasn-reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s cubic-bezier(.22,1,.36,1), transform 0.65s cubic-bezier(.22,1,.36,1);
}
.nasn-reveal.nasn-visible {
  opacity: 1;
  transform: translateY(0);
}
/* Stagger siblings */
.nasn-reveal:nth-child(2) { transition-delay: 0.08s; }
.nasn-reveal:nth-child(3) { transition-delay: 0.16s; }
.nasn-reveal:nth-child(4) { transition-delay: 0.24s; }
.nasn-reveal:nth-child(5) { transition-delay: 0.32s; }

/* Users who prefer no motion */
@media (prefers-reduced-motion: reduce) {
  .nasn-label-chip, .nasn-display, .nasn-hero-desc,
  .nasn-hero-btns, .nasn-hero-visual, .nasn-header { animation: none; }
  .nasn-reveal { opacity: 1; transform: none; transition: none; }
}

/* ── Mega Menu ── */
.nasn-mega-trigger {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--nasn-font-body);
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--nasn-text-muted);
  padding: 0;
  transition: color 0.15s;
}
.nasn-mega-trigger:hover,
.nasn-mega-trigger.is-active { color: var(--nasn-primary); }
.nasn-chevron {
  font-size: 1.1rem;
  transition: transform 0.22s cubic-bezier(.22,1,.36,1);
  font-variation-settings: 'FILL' 0,'wght' 300,'GRAD' 0,'opsz' 24;
}
.nasn-mega-trigger.is-active .nasn-chevron { transform: rotate(180deg); }

/* Hidden on desktop — only shown inside @media (max-width: 900px) */
.nasn-mobile-solutions-toggle { display: none; }
.nasn-mobile-solutions-list { display: none; }

.nasn-mega-panel {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: #fff;
  border-top: 1px solid var(--nasn-border);
  box-shadow: 0 24px 60px rgba(15,23,42,0.1);
  z-index: 190;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 0.2s, transform 0.2s, visibility 0s 0.2s;
}
.nasn-mega-panel.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity 0.2s, transform 0.2s, visibility 0s 0s;
}
.nasn-mega-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  min-height: 300px;
}

/* Tabs (left column) */
.nasn-mega-tabs {
  width: 230px;
  flex-shrink: 0;
  border-right: 1px solid var(--nasn-border);
  padding: 1.25rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
}
.nasn-mega-tab {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.625rem 0.875rem;
  background: none;
  border: none;
  border-left: 3px solid transparent;
  border-radius: 0 0.5rem 0.5rem 0;
  cursor: pointer;
  text-align: left;
  font-family: var(--nasn-font-body);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--nasn-text-muted);
  transition: all 0.15s;
  line-height: 1.3;
}
.nasn-mega-tab .material-symbols-outlined {
  font-size: 1.05rem;
  flex-shrink: 0;
  font-variation-settings: 'FILL' 0,'wght' 300,'GRAD' 0,'opsz' 24;
}
.nasn-mega-tab:hover { background: var(--nasn-surface); color: var(--nasn-text); }
.nasn-mega-tab.is-active {
  background: var(--nasn-primary-light);
  border-left-color: var(--nasn-primary);
  color: var(--nasn-primary-dark);
  font-weight: 600;
}

/* Content area (right) */
.nasn-mega-contents {
  flex: 1;
  padding: 1.5rem 2rem;
  min-width: 0;
  overflow-y: auto;
  max-height: 420px;
}
.nasn-mega-content {
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}
.nasn-mega-content.is-active { display: grid; }
.nasn-mega-col { display: flex; flex-direction: column; gap: 1.5rem; }
.nasn-mega-group-title {
  font-family: var(--nasn-font-headline);
  font-weight: 700;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--nasn-primary);
  margin-bottom: 0.625rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--nasn-border);
}
.nasn-mega-items {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.nasn-mega-items li {
  font-size: 0.8125rem;
  color: var(--nasn-text-muted);
  padding: 0.3rem 0.625rem;
  border-radius: 0.375rem;
  cursor: default;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: background 0.12s, color 0.12s;
}
.nasn-mega-items li::before {
  content: '';
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--nasn-border);
  flex-shrink: 0;
  transition: background 0.12s;
}
.nasn-mega-items li:hover {
  background: var(--nasn-primary-light);
  color: var(--nasn-primary-dark);
}
.nasn-mega-items li:hover::before { background: var(--nasn-primary); }

/* ── Responsive ── */
@media (max-width: 900px) {
  /* Layout */
  .nasn-hero-grid { grid-template-columns: 1fr; }
  .nasn-hero-visual { display: none; }
  .nasn-hero { min-height: auto; padding: 4rem 0; }
  .nasn-cards-row--top { grid-template-columns: 1fr; }
  .nasn-contact-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .nasn-footer-grid { grid-template-columns: 1fr; }
  .nasn-container { padding: 0 1.25rem; }
  .nasn-usecase-grid { grid-template-columns: 1fr 1fr; gap: 0.75rem; }
  .nasn-usecase-img-wrap { height: 260px; }
  .nasn-usecase-title { font-size: 1.1rem; }
  .nasn-stats-grid { grid-template-columns: repeat(2, 1fr); gap: 2rem 1rem; }

  /* Header – show hamburger */
  .nasn-hamburger { display: flex; }
  .nasn-btn-primary-link { display: none; }

  /* Mobile nav: hidden by default, slides down when .open */
  .nasn-nav {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    border-top: 1px solid var(--nasn-border);
    box-shadow: 0 8px 24px rgba(15,23,42,0.1);
    padding: 0.75rem 1.5rem 1.5rem;
    gap: 0;
    z-index: 180;
  }
  .nasn-nav.open { display: flex; }
  .nasn-nav a {
    display: block;
    padding: 0.75rem 0;
    font-size: 1rem;
    border-bottom: 1px solid var(--nasn-border);
    color: var(--nasn-text);
  }
  .nasn-nav a:last-child { border-bottom: none; }

  /* Mobile Solutions accordion */
  .nasn-mobile-solutions-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0.75rem 0;
    font-size: 1rem;
    font-weight: 500;
    color: var(--nasn-text);
    background: none;
    border: none;
    border-bottom: 1px solid var(--nasn-border);
    cursor: pointer;
    font-family: var(--nasn-font-body);
  }
  .nasn-mobile-solutions-toggle .nasn-chevron {
    font-size: 1.2rem;
    transition: transform 0.22s;
  }
  .nasn-mobile-solutions-toggle.is-open .nasn-chevron { transform: rotate(180deg); }
  .nasn-mobile-solutions-list {
    display: none;
    flex-direction: column;
    padding: 0.5rem 0 0.25rem 1rem;
    gap: 0;
    border-bottom: 1px solid var(--nasn-border);
  }
  .nasn-mobile-solutions-list.is-open { display: flex; }
  .nasn-mobile-category {
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--nasn-primary);
    padding: 0.625rem 0 0.25rem;
  }
  .nasn-mobile-solutions-list a {
    font-size: 0.875rem;
    color: var(--nasn-text-muted);
    padding: 0.35rem 0;
    border: none;
  }

  /* Mega menu hidden on mobile */
  .nasn-mega-panel { display: none; }
  .nasn-mega-trigger { display: none; }
}