/* =========================================================
   Bright Tunnel Networks — styles.css
   Vanilla CSS3. No build step, no preprocessor.
   ========================================================= */

/* -------------------- Design Tokens -------------------- */
:root {
  /* Colors */
  --navy-900: #0a1530;
  --navy-800: #0d1b3e;
  --blue-700: #123c96;
  --blue-600: #1258c4;
  --blue-500: #1e6fff;
  --blue-400: #3b9dff;
  --blue-300: #7cc4ff;
  --sky-300: #38bdf8;
  --white: #ffffff;
  --gray-50: #f6f8fb;
  --gray-100: #eef1f6;
  --gray-200: #e2e7ef;
  --gray-500: #6b7686;
  --gray-600: #5a6472;

  --text-body: #333c4a;
  --text-muted: var(--gray-600);

  /* Gradients (used sparingly) */
  --gradient-brand: linear-gradient(120deg, var(--blue-700) 0%, var(--blue-500) 55%, var(--sky-300) 100%);
  --gradient-accent: linear-gradient(120deg, var(--blue-600), var(--sky-300));
  --gradient-soft: radial-gradient(circle at 15% 20%, rgba(30, 111, 255, 0.10), transparent 45%),
    radial-gradient(circle at 85% 15%, rgba(56, 189, 248, 0.12), transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(18, 60, 150, 0.06), transparent 55%);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    Helvetica, Arial, sans-serif;

  /* Spacing scale */
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4.5rem;
  --space-7: 6rem;

  /* Layout */
  --max-width: 1200px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;

  /* Motion */
  --transition-fast: 150ms ease;
  --transition-base: 240ms ease;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(10, 21, 48, 0.06);
  --shadow-md: 0 8px 24px rgba(10, 21, 48, 0.10);
  --shadow-lg: 0 18px 46px rgba(10, 21, 48, 0.16);
  --shadow-glow: 0 0 0 1px rgba(56, 189, 248, 0.18), 0 12px 34px rgba(18, 60, 150, 0.22);
}

/* -------------------- Reset -------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--text-body);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img,
picture,
svg {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
  padding: 0;
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

input,
textarea,
select {
  font: inherit;
  color: inherit;
}

/* -------------------- Accessibility -------------------- */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--blue-600);
  color: var(--white);
  padding: 0.75rem 1.25rem;
  z-index: 1000;
  border-radius: 0 0 var(--radius-sm) 0;
  font-weight: 600;
}

.skip-link:focus {
  left: 0;
}

:focus-visible {
  outline: 3px solid var(--blue-400);
  outline-offset: 3px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* -------------------- Typography -------------------- */
h1,
h2,
h3,
h4 {
  font-weight: 700;
  color: var(--navy-800);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(2.6rem, 5vw, 4.25rem);
  line-height: 1.08;
}

h2 {
  font-size: clamp(1.85rem, 3.2vw, 2.75rem);
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
}

h4 {
  font-size: 1.125rem;
}

p {
  color: var(--text-body);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue-600);
  margin-bottom: var(--space-2);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--blue-500);
  display: inline-block;
}

.section-heading {
  max-width: 720px;
  margin-bottom: var(--space-5);
}

.section-heading p {
  margin-top: var(--space-2);
  color: var(--text-muted);
  font-size: 1.05rem;
}

.section-heading.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-heading.center .eyebrow::before {
  display: none;
}

/* -------------------- Layout Helpers -------------------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

.section {
  padding-block: var(--space-6);
  position: relative;
}

.section-alt {
  background: var(--gray-50);
}

.section-dark {
  background: var(--gradient-brand);
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.section-dark h2,
.section-dark h3,
.section-dark .eyebrow {
  color: var(--white);
}

.section-dark .eyebrow::before {
  background: var(--sky-300);
}

.section-dark p {
  color: rgba(255, 255, 255, 0.82);
}

/* -------------------- Grid / circuit backgrounds -------------------- */
.bg-grid {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(124, 196, 255, 0.10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124, 196, 255, 0.10) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 40%, transparent 90%);
  mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 40%, transparent 90%);
}

.bg-grid.bg-grid-light {
  background-image:
    linear-gradient(rgba(20, 38, 80, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 38, 80, 0.05) 1px, transparent 1px);
}

.section > .container {
  position: relative;
  z-index: 1;
}

/* -------------------- Buttons -------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 1.7rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.98rem;
  border: 2px solid transparent;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast),
    background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  white-space: nowrap;
  position: relative;
}

.btn-primary {
  background: var(--blue-600);
  color: var(--white);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--blue-700);
  box-shadow: 0 10px 28px rgba(18, 60, 150, 0.35);
  transform: translateY(-2px);
}

.btn-secondary {
  background: transparent;
  color: var(--navy-800);
  border-color: var(--gray-200);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  border-color: var(--blue-500);
  color: var(--blue-600);
  transform: translateY(-2px);
}

.section-dark .btn-secondary {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.4);
}

.section-dark .btn-secondary:hover,
.section-dark .btn-secondary:focus-visible {
  border-color: var(--white);
  color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

.btn-block {
  width: 100%;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* -------------------- Header / Nav -------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 500;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--gray-200);
  transition: box-shadow var(--transition-base);
}

.site-header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
}

.site-header.is-scrolled {
  box-shadow: 0 8px 28px rgba(10, 21, 48, 0.10);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 1.1rem;
  gap: var(--space-3);
  position: relative;
  transition: padding-block var(--transition-base);
}

.site-header.is-scrolled .nav-wrap {
  padding-block: 0.55rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
  position: relative;
  padding: 0.5rem 0.75rem 0.5rem 0;
}

.brand-glow {
  position: absolute;
  left: -22px;
  top: 50%;
  transform: translateY(-50%);
  width: 150px;
  height: 150px;
  background: radial-gradient(circle, rgba(30, 111, 255, 0.16), rgba(56, 189, 248, 0) 70%);
  filter: blur(4px);
  opacity: 0.8;
  pointer-events: none;
  z-index: 0;
  animation: glowPulse 4.5s ease-in-out infinite;
}

.brand img.logo-full {
  position: relative;
  z-index: 1;
  height: 95px;
  width: auto;
  transition: height var(--transition-base);
}

.site-header.is-scrolled .brand img.logo-full {
  height: 66px;
}

.brand-text {
  display: none;
}

.primary-nav {
  display: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav-links a {
  font-weight: 600;
  font-size: 0.96rem;
  color: var(--text-body);
  white-space: nowrap;
  padding: 0.4rem 0.1rem;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--blue-500);
  transition: width var(--transition-fast);
}

.nav-links a:hover,
.nav-links a:focus-visible,
.nav-links a[aria-current="page"] {
  color: var(--blue-600);
}

.nav-links a:hover::after,
.nav-links a:focus-visible::after,
.nav-links a[aria-current="page"]::after {
  width: 100%;
}

.nav-cta {
  display: none;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.nav-toggle-bars {
  position: relative;
  width: 20px;
  height: 14px;
}

.nav-toggle-bars span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--navy-800);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base), top var(--transition-base);
}

.nav-toggle-bars span:nth-child(1) { top: 0; }
.nav-toggle-bars span:nth-child(2) { top: 6px; }
.nav-toggle-bars span:nth-child(3) { top: 12px; }

.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1) {
  top: 6px;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3) {
  top: 6px;
  transform: rotate(-45deg);
}

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  padding: var(--space-2) var(--space-3) var(--space-4);
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  box-shadow: 0 12px 24px rgba(10, 21, 48, 0.08);
}

.mobile-nav.is-open {
  display: flex;
}

.mobile-nav a {
  padding: 0.8rem 0.25rem;
  font-weight: 600;
  color: var(--navy-800);
  border-bottom: 1px solid var(--gray-100);
}

.mobile-nav a[aria-current="page"] {
  color: var(--blue-600);
}

.mobile-nav .btn {
  margin-top: var(--space-2);
}

@media (min-width: 900px) {
  .brand-text {
    display: block;
  }

  .brand img.logo-full {
    height: 142px;
  }

  .site-header.is-scrolled .brand img.logo-full {
    height: 80px;
  }
}

/* The full horizontal nav (links + CTA button) only switches on at 1280px.
   The logo's wider aspect ratio plus "Managed Networks" and the CTA button
   don't reliably fit next to it below that, so the mobile menu is used
   instead all the way up to 1280px. Nav gaps and the CTA button are also
   slightly tightened here (nav-specific only, not sitewide) to keep a
   comfortable safety margin. */
@media (min-width: 1280px) {
  .brand img.logo-full {
    height: 163px;
  }

  .site-header.is-scrolled .brand img.logo-full {
    height: 85px;
  }

  .primary-nav {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    flex: 1;
    justify-content: flex-end;
  }

  .nav-links {
    gap: 1.25rem;
  }

  .nav-cta {
    display: inline-flex;
    padding: 0.75rem 1.25rem;
    font-size: 0.92rem;
  }

  .nav-toggle,
  .mobile-nav {
    display: none !important;
  }
}

/* -------------------- Hero -------------------- */
.hero {
  position: relative;
  background: var(--white);
  color: var(--text-body);
  overflow: hidden;
  padding-block: var(--space-7) var(--space-6);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: var(--gradient-soft);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  gap: var(--space-6);
  align-items: center;
  position: relative;
  z-index: 1;
}

@media (min-width: 960px) {
  .hero-grid {
    grid-template-columns: 1.05fr 0.95fr;
  }
}

.hero-eyebrow {
  color: var(--blue-600);
}

.hero h1 {
  color: var(--navy-800);
  margin-bottom: var(--space-3);
}

.hero-lead {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: var(--space-4);
}

.hero-visual {
  position: relative;
  aspect-ratio: 4 / 3.1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(165deg, var(--gray-50) 0%, #eaf2ff 100%);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-lg);
}

.tunnel-svg,
.architecture-svg {
  width: 100%;
  height: 100%;
}

/* Network line + node classes used inside inline SVGs.
   Motion is reserved for the hero diagram only — elsewhere these
   render as clean static artwork so the page doesn't feel busy. */
.net-line {
  fill: none;
  stroke-linecap: round;
}

.net-node {
  transform-box: fill-box;
  transform-origin: center;
}

.net-ring {
  fill: none;
  transform-box: fill-box;
  transform-origin: center;
}

.hero .net-line {
  animation: dashFlow 3.6s linear infinite;
}

.hero .net-line.slow { animation-duration: 6s; }
.hero .net-line.fast { animation-duration: 2.2s; }

.hero .net-node {
  animation: pulseNode 2.6s ease-in-out infinite;
}

.net-node.delay-1 { animation-delay: 0.3s; }
.net-node.delay-2 { animation-delay: 0.6s; }
.net-node.delay-3 { animation-delay: 0.9s; }
.net-node.delay-4 { animation-delay: 1.2s; }
.net-node.delay-5 { animation-delay: 1.5s; }

.hero .net-ring {
  animation: ringSpin 40s linear infinite;
}

.hero .net-ring.reverse {
  animation-direction: reverse;
}

@keyframes dashFlow {
  to { stroke-dashoffset: -120; }
}

@keyframes pulseNode {
  0%, 100% { opacity: 0.55; transform: scale(0.88); }
  50% { opacity: 1; transform: scale(1.18); }
}

@keyframes glowPulse {
  0%, 100% { opacity: 0.35; transform: translateY(-50%) scale(0.94); }
  50% { opacity: 0.65; transform: translateY(-50%) scale(1.06); }
}

@keyframes ringSpin {
  to { transform: rotate(360deg); }
}

@keyframes floatSlow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* -------------------- Trust Bar -------------------- */
.trust-section {
  padding-block: var(--space-5);
  border-bottom: 1px solid var(--gray-200);
}

.trust-flow {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  text-align: center;
  margin-top: var(--space-4);
}

.trust-flow-item {
  padding: var(--space-3) var(--space-2);
  border-radius: var(--radius-md);
  background: var(--gray-50);
}

.trust-flow-item .step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--blue-500);
  color: var(--white);
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: var(--space-2);
}

.trust-flow-item h3 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.trust-flow-item p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* -------------------- Cards -------------------- */
.card-grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.card:hover,
.card:focus-within {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--blue-300);
}

.card:hover .card-icon {
  transform: scale(1.08) rotate(-4deg);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--blue-700), var(--blue-500));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  margin-bottom: var(--space-3);
  flex-shrink: 0;
  transition: transform var(--transition-base);
  box-shadow: 0 8px 18px rgba(18, 60, 150, 0.28);
}

.card h3 {
  margin-bottom: 0.5rem;
}

.card p {
  color: var(--text-muted);
  font-size: 0.98rem;
}

.card ul {
  margin-top: var(--space-2);
  display: grid;
  gap: 0.5rem;
}

.card ul li {
  font-size: 0.92rem;
  color: var(--text-muted);
  padding-left: 1.35rem;
  position: relative;
}

.card ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--blue-500);
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: var(--space-3);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--blue-600);
}

.card-link svg {
  transition: transform var(--transition-fast);
}

.card:hover .card-link svg {
  transform: translateX(4px);
}

/* -------------------- Why Section / Feature list -------------------- */
.feature-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
}

.feature-item {
  display: flex;
  gap: var(--space-2);
  align-items: flex-start;
  flex: 1 1 240px;
  max-width: 340px;
}

.feature-item .icon-badge {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(30, 111, 255, 0.12);
  color: var(--blue-600);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.section-dark .feature-item .icon-badge {
  background: rgba(255, 255, 255, 0.12);
  color: var(--blue-300);
}

.feature-item h3 {
  font-size: 1.05rem;
  margin-bottom: 0.2rem;
}

.feature-item p {
  font-size: 0.92rem;
  color: var(--text-muted);
}

.section-dark .feature-item p {
  color: rgba(255, 255, 255, 0.78);
}

/* -------------------- What We Manage -------------------- */
.manage-grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.manage-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.6rem;
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--white);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.manage-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--blue-300);
}

.manage-item .manage-icon {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: rgba(30, 111, 255, 0.10);
  border: 1px solid rgba(30, 111, 255, 0.22);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-600);
}

.manage-item h3 {
  font-size: 0.98rem;
  color: var(--navy-800);
}

/* -------------------- Problems We Solve -------------------- */
.problem-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
}

.problem-item {
  display: flex;
  gap: var(--space-2);
  align-items: flex-start;
  padding: var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-200);
  background: var(--white);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
  flex: 1 1 260px;
  max-width: 360px;
}

.problem-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.problem-item h3 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.problem-item p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* -------------------- Industries -------------------- */
.industry-grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.industry-card {
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--white);
  border: 1px solid var(--gray-200);
  text-align: left;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.industry-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.industry-card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
}

.industry-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.industry-detail {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin-bottom: var(--space-3);
  background: var(--white);
  transition: box-shadow var(--transition-base);
}

.industry-detail:hover {
  box-shadow: var(--shadow-md);
}

.industry-detail h3 {
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.industry-detail h3 .industry-icon {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgba(30, 111, 255, 0.1);
  color: var(--blue-600);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.industry-detail .challenge-solution {
  display: grid;
  gap: var(--space-3);
}

@media (min-width: 720px) {
  .industry-detail .challenge-solution {
    grid-template-columns: 1fr 1fr;
  }
}

.challenge-solution h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--blue-600);
  margin-bottom: 0.5rem;
}

.challenge-solution ul {
  display: grid;
  gap: 0.4rem;
}

.challenge-solution ul li {
  font-size: 0.92rem;
  color: var(--text-muted);
  padding-left: 1.2rem;
  position: relative;
}

.challenge-solution ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue-500);
}

.challenge-solution .solution ul li::before {
  background: #2fae66;
}

/* -------------------- Process / Lifecycle -------------------- */
.process-grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  counter-reset: step;
}

.process-step {
  position: relative;
  padding: var(--space-4) var(--space-3) var(--space-3);
  border-radius: var(--radius-md);
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
}

.process-step .step-index {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--blue-300);
  -webkit-text-stroke: 1px var(--blue-500);
  display: block;
  margin-bottom: var(--space-2);
}

.process-step h3 {
  margin-bottom: 0.4rem;
}

.process-step p {
  font-size: 0.92rem;
  color: var(--text-muted);
}

.lifecycle-track {
  position: relative;
  padding-top: var(--space-4);
}

.lifecycle-line-wrap {
  position: relative;
  height: 34px;
  margin-bottom: var(--space-2);
  display: none;
}

.lifecycle-line-wrap svg {
  width: 100%;
  height: 100%;
}

.lifecycle-steps {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  position: relative;
}

.lifecycle-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.6rem;
}

.lifecycle-step .lifecycle-dot {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--navy-800);
  border: 2px solid var(--sky-300);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.95rem;
  position: relative;
  z-index: 1;
  box-shadow: 0 0 0 6px rgba(56, 189, 248, 0.08);
}

.lifecycle-step h3 {
  font-size: 0.95rem;
}

.lifecycle-step p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

@media (min-width: 900px) {
  .lifecycle-line-wrap {
    display: block;
  }
}

/* -------------------- Split section (image/text) -------------------- */
.split {
  display: grid;
  gap: var(--space-5);
  align-items: center;
}

@media (min-width: 960px) {
  .split {
    grid-template-columns: 1fr 1fr;
  }

  .split.reverse .split-visual {
    order: 2;
  }
}

.split-visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--gradient-brand);
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  border: 1px solid rgba(124, 196, 255, 0.18);
  box-shadow: var(--shadow-lg);
}

.split-visual svg {
  width: 78%;
  height: 78%;
  position: relative;
  z-index: 1;
}

.split ul {
  margin-top: var(--space-3);
  display: grid;
  gap: 0.6rem;
}

.split ul li {
  padding-left: 1.6rem;
  position: relative;
  font-size: 0.98rem;
  color: var(--text-body);
}

.split ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: var(--blue-500);
}

/* -------------------- Note / Disclaimer boxes -------------------- */
.note-box {
  border-left: 4px solid var(--blue-500);
  background: var(--gray-50);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: var(--space-3);
  font-size: 0.94rem;
  color: var(--text-muted);
}

.note-box strong {
  color: var(--navy-800);
}

/* -------------------- CTA Section -------------------- */
.cta-section {
  text-align: center;
}

.cta-section .btn-row {
  justify-content: center;
  margin-top: var(--space-4);
}

/* -------------------- Forms -------------------- */
.form-grid {
  display: grid;
  gap: var(--space-3);
}

@media (min-width: 720px) {
  .form-grid.two-col {
    grid-template-columns: 1fr 1fr;
  }
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-field.full {
  grid-column: 1 / -1;
}

.form-field label {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--navy-800);
}

.form-field .hint {
  font-size: 0.82rem;
  color: var(--gray-500);
}

.form-field input,
.form-field select,
.form-field textarea {
  padding: 0.75rem 0.9rem;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  background: var(--white);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(30, 111, 255, 0.15);
  outline: none;
}

.form-field textarea {
  resize: vertical;
  min-height: 140px;
}

.form-status {
  margin-top: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-sm);
  background: rgba(30, 111, 255, 0.08);
  border: 1px solid rgba(30, 111, 255, 0.25);
  color: var(--navy-800);
  font-size: 0.94rem;
  display: none;
}

.form-status.is-visible {
  display: block;
}

.config-note {
  margin-top: var(--space-4);
}

.form-alt-contact {
  font-size: 0.92rem;
  color: var(--text-muted);
}

.form-alt-contact a {
  font-weight: 600;
}

/* -------------------- Footer -------------------- */
.site-footer {
  background: var(--navy-900);
  color: rgba(255, 255, 255, 0.8);
  padding-block: var(--space-6) var(--space-4);
  position: relative;
  overflow: hidden;
}

.footer-grid {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: 1fr;
}

@media (min-width: 780px) {
  .footer-grid {
    grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
  }
}

.footer-brand img.logo-full {
  height: 52px;
  width: auto;
  display: block;
  margin-bottom: var(--space-3);
}

@media (min-width: 700px) {
  .footer-brand img.logo-full {
    height: 64px;
  }
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.92rem;
  max-width: 320px;
}

.footer-col h4 {
  color: var(--white);
  font-size: 0.95rem;
  margin-bottom: var(--space-2);
  letter-spacing: 0.02em;
}

.footer-col ul {
  display: grid;
  gap: 0.55rem;
}

.footer-col a {
  font-size: 0.92rem;
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-fast);
}

.footer-col a:hover,
.footer-col a:focus-visible {
  color: var(--white);
}

.footer-col address {
  font-style: normal;
  font-size: 0.92rem;
  color: rgba(255, 255, 255, 0.7);
  display: grid;
  gap: 0.4rem;
}

.footer-bottom {
  margin-top: var(--space-6);
  padding-top: var(--space-3);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: space-between;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.55);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.7);
}

.footer-bottom a:hover {
  color: var(--white);
}

/* -------------------- Fade-in / reveal animations -------------------- */
.fade-in-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in-left.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in-right.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-scale {
  opacity: 0;
  transform: scale(0.94);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in-scale.is-visible {
  opacity: 1;
  transform: scale(1);
}

/* stagger helper delays, applied via inline style or nth-child in JS-free CSS */
.stagger-1 { transition-delay: 0.05s; }
.stagger-2 { transition-delay: 0.12s; }
.stagger-3 { transition-delay: 0.19s; }
.stagger-4 { transition-delay: 0.26s; }
.stagger-5 { transition-delay: 0.33s; }
.stagger-6 { transition-delay: 0.4s; }

@media (prefers-reduced-motion: reduce) {
  .fade-in-up,
  .fade-in-left,
  .fade-in-right,
  .fade-in-scale {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .net-line,
  .net-node,
  .net-ring,
  .brand-glow {
    animation: none !important;
  }
}

/* -------------------- Page hero (interior pages) -------------------- */
.page-hero {
  background: linear-gradient(165deg, var(--gray-50) 0%, #eef4ff 100%);
  color: var(--text-body);
  padding-block: var(--space-6) var(--space-5);
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--gray-200);
}

.page-hero h1 {
  color: var(--navy-800);
  margin-bottom: var(--space-2);
}

.page-hero p {
  color: var(--text-muted);
  max-width: 680px;
  font-size: 1.05rem;
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--gray-500);
  margin-bottom: var(--space-2);
}

.breadcrumb a {
  color: var(--blue-600);
}

/* -------------------- Service detail blocks -------------------- */
.service-detail {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-5) 0;
  border-bottom: 1px solid var(--gray-200);
  grid-template-columns: 1fr;
}

@media (min-width: 860px) {
  .service-detail {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: start;
  }

  .service-detail.reverse .service-visual {
    order: 2;
  }
}

.service-detail:last-child {
  border-bottom: none;
}

.service-detail .service-number {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--blue-600);
  letter-spacing: 0.06em;
}

.service-detail h3 {
  margin-bottom: 0.4rem;
}

.service-detail > div > p {
  color: var(--text-muted);
  margin-bottom: var(--space-3);
}

.service-detail ul {
  display: grid;
  gap: 0.5rem;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
}

.service-detail ul li {
  font-size: 0.92rem;
  color: var(--text-body);
  padding-left: 1.3rem;
  position: relative;
}

.service-detail ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--blue-500);
}

.service-visual {
  border-radius: var(--radius-lg);
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  padding: var(--space-3);
  display: flex;
  align-items: center;
  justify-content: center;
}

.service-visual svg {
  width: 100%;
  height: auto;
}

/* -------------------- 404 page -------------------- */
.error-page {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-block: var(--space-7);
}

.error-code {
  font-size: clamp(4rem, 10vw, 7rem);
  font-weight: 800;
  color: var(--blue-300);
  -webkit-text-stroke: 2px var(--navy-800);
  line-height: 1;
  margin-bottom: var(--space-3);
}

/* -------------------- Utility -------------------- */
.text-center {
  text-align: center;
}

.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }

.placeholder-flag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--blue-700);
  background: rgba(30, 111, 255, 0.1);
  border: 1px solid rgba(30, 111, 255, 0.25);
  border-radius: 4px;
  padding: 0.1rem 0.45rem;
  margin-left: 0.4rem;
  vertical-align: middle;
}

.float-slow {
  animation: floatSlow 5s ease-in-out infinite;
}

/* -------------------- Service Packages (tiers) -------------------- */
.package-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  align-items: stretch;
}

.package-card {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  position: relative;
}

.package-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--blue-300);
}

.package-card.featured {
  border-color: var(--blue-400);
  box-shadow: var(--shadow-glow);
}

.package-card.featured::before {
  content: "Most Popular";
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--blue-600);
  color: var(--white);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.3rem 0.9rem;
  border-radius: 999px;
  box-shadow: 0 6px 14px rgba(30, 111, 255, 0.35);
}

.package-name {
  font-size: 1.35rem;
  margin-bottom: 0.3rem;
}

.package-audience {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--gray-100);
}

.package-audience strong {
  color: var(--navy-800);
}

.package-card ul {
  display: grid;
  gap: 0.6rem;
  margin-bottom: var(--space-4);
  flex: 1;
}

.package-card ul li {
  font-size: 0.94rem;
  color: var(--text-body);
  padding-left: 1.5rem;
  position: relative;
}

.package-card ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.35em;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: rgba(30, 111, 255, 0.12);
}

.package-card ul li::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 0.62em;
  width: 6px;
  height: 3px;
  border-left: 2px solid var(--blue-600);
  border-bottom: 2px solid var(--blue-600);
  transform: rotate(-45deg);
}

.package-card .btn {
  margin-top: auto;
}