/* =========================================================
   Stack Link — Telephony Solutions page
   Shared visual language: LIGHT GREEN + WHITE theme
   ========================================================= */

:root {
  --deep-50: #eefaf2;
  /* light-green "dark section" background */
  --deep-100: #e2f6e9;
  --deep-200: #d3f1de;
  --deep-300: #c1ebd0;
  --green-600: #16a34a;
  /* primary accent */
  --green-500: #1fb457;
  --green-400: #34d17c;
  --green-300: #0f7a3c;
  /* readable dark-green text on light backgrounds */
  --ice-50: #ffffff;
  --ice-100: #f3fbf6;
  --line: rgba(22, 163, 74, 0.16);
  --line-strong: rgba(22, 163, 74, 0.32);
  --text-dim: #4b6b5b;
  --text-dim-dark: #3d6b52;
  --ink: #0b1f16;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--ice-50);
  color: var(--ink);
  font-family: 'Inter', sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
}

h1,
h2,
h3,
h4 {
  margin: 0;
  letter-spacing: -0.01em;
  font-weight: 700;
}

p {
  margin: 0;
}

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

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

:focus-visible {
  outline: 2px solid var(--green-600);
  outline-offset: 3px;
}

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------- SCROLL PROGRESS ---------- */
#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  z-index: 300;
  background: linear-gradient(90deg, var(--green-600), var(--green-400), var(--green-500));
  box-shadow: 0 0 10px rgba(22, 163, 74, .5);
  transition: width .1s linear;
}

/* ---------- REVEAL ANIMATIONS ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .7s cubic-bezier(.2, .7, .3, 1), transform .7s cubic-bezier(.2, .7, .3, 1);
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

.reveal-stagger>* {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s cubic-bezier(.2, .7, .3, 1), transform .6s cubic-bezier(.2, .7, .3, 1);
}

.reveal-stagger.in>* {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- PAGE HERO ---------- */
.page-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, var(--deep-50), var(--ice-50));
  color: var(--ink);
  padding: 90px 0 70px;
  border-bottom: 1px solid var(--line);
}

.page-hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 46px 46px;
  -webkit-mask-image: radial-gradient(ellipse 800px 500px at 70% 20%, #000, transparent 75%);
  mask-image: radial-gradient(ellipse 800px 500px at 70% 20%, #000, transparent 75%);
}

.page-hero-glow {
  position: absolute;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(22, 163, 74, .22), transparent 70%);
  right: -140px;
  top: -160px;
  filter: blur(10px);
  animation: breathe 6s ease-in-out infinite;
}

@keyframes breathe {

  0%,
  100% {
    transform: scale(1);
    opacity: .7;
  }

  50% {
    transform: scale(1.12);
    opacity: 1;
  }
}

.page-hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 44px;
  align-items: center;
}

.page-hero-crumb {
  color: var(--text-dim);
  font-size: 13px;
  margin-bottom: 18px;
}

.page-hero-crumb a {
  color: var(--green-600);
}

.page-hero-crumb a:hover {
  color: var(--ink);
}

.eyebrow {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .02em;
  margin-bottom: 4px;
  color: var(--green-600) !important;
}

.page-hero h1 {
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.12;
  margin-top: 6px;
  max-width: 560px;
  color: var(--ink);
}

.page-hero .lede {
  margin-top: 20px;
  color: var(--text-dim);
  font-size: 16.5px;
  line-height: 1.65;
  max-width: 520px;
}

.page-hero-actions {
  margin-top: 32px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary {
  background: var(--green-600);
  box-shadow: 0 10px 30px -10px rgba(22, 163, 74, .6);
  animation: ctaGlow 2.8s ease-in-out infinite;
}

@keyframes ctaGlow {

  0%,
  100% {
    box-shadow: 0 10px 30px -10px rgba(22, 163, 74, .55);
  }

  50% {
    box-shadow: 0 10px 34px -6px rgba(52, 209, 124, .8);
  }
}

.btn-ghost {
  background: #fff;
  border: 1px solid var(--line-strong);
  color: var(--ink);
  box-shadow: none;
}

.btn-ghost::before {
  display: none;
}

.btn-ghost:hover {
  background: var(--deep-100);
  border-color: var(--green-500);
}

/* hero card: icon + stats */
.page-hero-card {
  position: relative;
  z-index: 2;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 36px 28px 28px;
  box-shadow: 0 30px 60px -34px rgba(11, 61, 39, .25);
}

.page-hero-icon {
  position: relative;
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.phi-ring {
  position: absolute;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
}

.phi-ring-1 {
  width: 150px;
  height: 150px;
  animation: spin 30s linear infinite;
}

.phi-ring-2 {
  width: 190px;
  height: 190px;
  animation: spin 46s linear infinite reverse;
}

.phi-ring-3 {
  width: 230px;
  height: 230px;
  animation: spin 60s linear infinite;
}

.phi-ring-1::before,
.phi-ring-2::before,
.phi-ring-3::before {
  content: '';
  position: absolute;
  width: 6px;
  height: 6px;
  background: var(--green-500);
  border-radius: 50%;
  top: -3px;
  left: 50%;
  box-shadow: 0 0 12px 2px rgba(31, 180, 87, .6);
}

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

.phi-badge {
  position: relative;
  z-index: 2;
  width: 104px;
  height: 104px;
  border-radius: 26px;
  background: linear-gradient(160deg, var(--deep-50), #fff);
  border: 1px solid var(--line-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: floaty 5s ease-in-out infinite;
  box-shadow: 0 20px 40px -20px rgba(11, 61, 39, .25), inset 0 1px 0 rgba(255, 255, 255, .6);
}

@keyframes floaty {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-12px);
  }
}

.phi-badge svg {
  width: 44px;
  height: 44px;
  fill: none;
  stroke: var(--green-600);
  stroke-width: 1.6;
  filter: drop-shadow(0 0 10px rgba(31, 180, 87, .3));
  animation: ringShake 4.5s ease-in-out infinite;
  transform-origin: 50% 50%;
}

@keyframes ringShake {

  0%,
  88%,
  100% {
    transform: rotate(0deg) scale(1);
  }

  89% {
    transform: rotate(-10deg) scale(1.05);
  }

  90.5% {
    transform: rotate(9deg) scale(1.05);
  }

  92% {
    transform: rotate(-7deg) scale(1.03);
  }

  93.5% {
    transform: rotate(5deg) scale(1.02);
  }

  95% {
    transform: rotate(-3deg) scale(1);
  }

  96.5% {
    transform: rotate(0deg) scale(1);
  }
}

.page-hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 22px;
  border-top: 1px solid var(--line);
  padding-top: 22px;
}

.page-hero-stat {
  text-align: center;
}

.page-hero-stat b {
  display: block;
  font-size: 24px;
  font-weight: 700;
  color: var(--ink);
}

.page-hero-stat span {
  display: block;
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 4px;
}

@media (max-width:900px) {
  .page-hero-inner {
    grid-template-columns: 1fr;
  }
}

/* ---------- SECTION HEAD ---------- */
.section-pad {
  padding: 88px 0;
}

.section-head {
  max-width: 600px;
  margin-bottom: 50px;
}

.section-head .eyebrow {
  color: var(--green-600);
  font-size: 13.5px;
}

.bg-section .section-head .eyebrow {
  color: var(--green-600) !important;
}

.section-head h2 {
  font-size: clamp(25px, 3vw, 34px);
  color: var(--ink);
}

.bg-section .section-head h2 {
  color: var(--ink);
}

.section-head p {
  margin-top: 12px;
  color: var(--text-dim);
  font-size: 15.5px;
  line-height: 1.6;
}

.bg-section .section-head p {
  color: var(--text-dim);
}

.bg-section {
  background: var(--deep-50);
  color: var(--ink);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

/* ---------- INTRO ---------- */
.intro-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 48px;
  align-items: center;
}

.intro-grid img {
  border-radius: 16px;
  box-shadow: 0 30px 60px -30px rgba(11, 61, 39, .22);
}

.intro-copy .eyebrow {
  color: var(--green-600);
  font-size: 13.5px;
}

.intro-copy p {
  color: var(--text-dim);
  font-size: 15.5px;
  line-height: 1.7;
  margin-top: 14px;
}

@media (max-width:860px) {
  .intro-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- POINT GRID ---------- */
.point-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.point-card {
  display: flex;
  gap: 16px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 26px 22px;
  transition: transform .25s, border-color .25s, box-shadow .25s;
}

.point-card:hover {
  transform: translateY(-5px);
  border-color: var(--green-500);
  box-shadow: 0 18px 40px -22px rgba(11, 61, 39, .18);
}

.point-num {
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--green-600), var(--green-400));
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.point-num svg {
  width: 17px;
  height: 17px;
}

.point-card h4 {
  font-size: 15.5px;
  color: var(--ink);
  margin-bottom: 8px;
}

.point-card p {
  font-size: 13.6px;
  color: var(--text-dim);
  line-height: 1.6;
}

@media (max-width:900px) {
  .point-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width:560px) {
  .point-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- SERVICE GRID ---------- */
.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.service-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  transition: transform .25s, box-shadow .25s;
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 50px -24px rgba(11, 61, 39, .24);
}

.service-card-media {
  height: 150px;
  overflow: hidden;
}

.service-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}

.service-card:hover .service-card-media img {
  transform: scale(1.07);
}

.service-card-body {
  padding: 20px 20px 22px;
}

.service-card-body h3 {
  font-size: 16px;
  color: var(--ink);
  margin-bottom: 8px;
}

.service-card-body p {
  font-size: 13.6px;
  color: var(--text-dim);
  line-height: 1.55;
}

.service-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--green-600);
}

.service-card-link .arrow {
  transition: transform .2s;
}

.service-card-link:hover .arrow {
  transform: translateX(3px);
}

@media (max-width:900px) {
  .service-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width:560px) {
  .service-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- BRAND STRIP ---------- */
.brand-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.brand-pill {
  padding: 14px 26px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--line);
  font-weight: 600;
  font-size: 15px;
  color: var(--ink);
  transition: transform .2s, border-color .2s, color .2s;
}

.brand-pill:hover {
  transform: translateY(-3px);
  border-color: var(--green-500);
  color: var(--green-600);
}

/* ---------- FINAL CTA ---------- */
.final-cta {
  background: linear-gradient(135deg, var(--deep-100), var(--deep-50));
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 60px 48px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  flex-wrap: wrap;
  color: var(--ink);
}

.final-cta::after {
  content: '';
  position: absolute;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(22, 163, 74, .25), transparent 70%);
  right: -60px;
  top: -80px;
  filter: blur(6px);
}

.final-cta h2 {
  font-size: clamp(23px, 3vw, 30px);
  max-width: 440px;
  position: relative;
  z-index: 1;
  color: var(--ink);
}

.final-cta p {
  margin-top: 10px;
  color: var(--text-dim);
  font-size: 15px;
  position: relative;
  z-index: 1;
}

.final-cta p.phone {
  margin-top: 14px;
  color: var(--ink);
  font-weight: 600;
}

.final-cta p.phone a {
  color: var(--green-600);
}

.final-cta .btn {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
}

@media (max-width:760px) {
  .final-cta {
    flex-direction: column;
    align-items: flex-start;
    padding: 40px 26px;
  }
}

/* ---------- SECURE ACCESS SERVICE: page-specific additions ---------- */

/* article hero layout: text + quick-action rail instead of stats card */
.article-hero-inner {
  align-items: start;
}

.quick-rail {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.quick-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 18px;
  transition: transform .25s, border-color .25s, box-shadow .25s;
  overflow: hidden;
}

.quick-card:hover {
  transform: translateX(6px);
  border-color: var(--green-500);
  box-shadow: 0 16px 34px -20px rgba(11, 61, 39, .22);
}

.quick-pulse {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green-500);
}

.quick-pulse::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--green-500);
  animation: quickPing 2s ease-out infinite;
}

@keyframes quickPing {
  0% {
    transform: scale(1);
    opacity: .7;
  }

  100% {
    transform: scale(2.6);
    opacity: 0;
  }
}

.quick-ico {
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  border-radius: 11px;
  background: var(--deep-50);
  display: flex;
  align-items: center;
  justify-content: center;
}

.quick-ico svg {
  width: 20px;
  height: 20px;
  stroke: var(--green-600);
}

.quick-card h4 {
  font-size: 14.5px;
  color: var(--ink);
  margin-bottom: 2px;
}

.quick-card span {
  font-size: 12.5px;
  color: var(--text-dim);
}

.quick-arrow {
  margin-left: auto;
  color: var(--green-600);
  font-weight: 700;
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity .25s, transform .25s;
}

.quick-card:hover .quick-arrow {
  opacity: 1;
  transform: translateX(0);
}

@media (max-width:900px) {
  .article-hero-inner {
    grid-template-columns: 1fr;
  }
}

/* plain article text blocks (What is SAS / Final Thoughts) */
.article-block {
  max-width: 760px;
}

.article-block .eyebrow {
  color: var(--green-600);
}

.article-block h2 {
  font-size: clamp(24px, 3vw, 32px);
  color: var(--ink);
  max-width: 640px;
}

.article-block p {
  margin-top: 16px;
  color: var(--text-dim);
  font-size: 16px;
  line-height: 1.75;
}

/* feature trio with scan-line hover effect */
.feature-trio {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.scan-card {
  position: relative;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px 24px;
  transition: transform .25s, box-shadow .25s;
}

.scan-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 22px 44px -26px rgba(11, 61, 39, .24);
}

.scan-line {
  position: absolute;
  left: 0;
  right: 0;
  top: -2px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--green-400), transparent);
  opacity: 0;
  transform: translateY(-10px);
}

.scan-card:hover .scan-line {
  animation: scanSweep 1.4s ease-in-out infinite;
}

@keyframes scanSweep {
  0% {
    opacity: 0;
    transform: translateY(-10px);
  }

  15% {
    opacity: 1;
  }

  85% {
    opacity: 1;
  }

  100% {
    opacity: 0;
    transform: translateY(210px);
  }
}

.scan-ico {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--deep-50);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  transition: transform .25s;
}

.scan-card:hover .scan-ico {
  transform: scale(1.08) rotate(-3deg);
}

.scan-ico svg {
  width: 22px;
  height: 22px;
  stroke: var(--green-600);
}

.scan-card h3 {
  font-size: 16.5px;
  color: var(--ink);
  margin-bottom: 8px;
}

.scan-card p {
  font-size: 13.8px;
  color: var(--text-dim);
  line-height: 1.6;
}

@media (max-width:860px) {
  .feature-trio {
    grid-template-columns: 1fr;
  }
}

/* animated vertical timeline */
.timeline {
  position: relative;
  max-width: 720px;
  margin-top: 20px;
  padding-left: 8px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 23px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: var(--line-strong);
  height: 9vw;
}

.timeline-item {
  position: relative;
  display: flex;
  gap: 22px;
  padding: 0 0 34px 0;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-dot {
  flex: 0 0 auto;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--green-500);
  position: relative;
  z-index: 1;
  margin-top: 2px;
}

.timeline-dot::after {
  content: '';
  position: absolute;
  inset: 7px;
  border-radius: 50%;
  background: var(--green-500);
  transform: scale(0);
  transition: transform .4s cubic-bezier(.2, .8, .3, 1.2);
}

.reveal-stagger.in .timeline-dot::after {
  transform: scale(1);
}

.timeline-body h4 {
  font-size: 15.5px;
  color: var(--ink);
  margin-bottom: 6px;
}

.timeline-body p {
  font-size: 13.8px;
  color: var(--text-dim);
  line-height: 1.6;
}

/* compact challenge cards */
.mini-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.mini-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px 18px;
  transition: transform .22s, border-color .22s;
}

.mini-card:hover {
  transform: translateY(-4px);
  border-color: var(--green-500);
}

.mini-card h4 {
  font-size: 14.5px;
  color: var(--ink);
  margin-bottom: 6px;
}

.mini-card p {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.55;
}

@media (max-width:900px) {
  .mini-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width:560px) {
  .mini-grid {
    grid-template-columns: 1fr;
  }
}

/* stat band under final CTA */
.stat-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 34px;
  text-align: center;
}

.stat-band b {
  display: block;
  font-size: 28px;
  color: var(--ink);
  font-weight: 700;
}

.stat-band span {
  display: block;
  font-size: 13px;
  color: var(--text-dim);
  margin-top: 4px;
}

@media (max-width:640px) {
  .stat-band {
    grid-template-columns: 1fr;
  }
}

/* ---------- animated security visual (hero) ---------- */
.sas-visual {
  position: relative;
  height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 10px 0 26px;
}

.sas-badge {
  overflow: hidden;
  width: 140px !important;
  height: 140px !important;
  border-radius: 34px !important;
}

.sas-badge svg {
  stroke: var(--green-600);
  width: 60px !important;
  height: 60px !important;
}

.sas-check {
  animation: phiDraw 1.6s ease-out 1.6s forwards, checkPop 2s ease-in-out 3.4s infinite;
  stroke: var(--green-500) !important;
  stroke-width: 2.2;
}

@keyframes checkPop {

  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.18);
  }
}

.sas-beam {
  position: absolute;
  left: -10%;
  top: 0;
  width: 35%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(52, 209, 124, .35), transparent);
  transform: skewX(-18deg);
  animation: sasBeamSweep 3.2s ease-in-out infinite;
}

@keyframes sasBeamSweep {
  0% {
    left: -40%;
  }

  45% {
    left: 110%;
  }

  100% {
    left: 110%;
  }
}

.sas-tag {
  position: absolute;
  background: #fff;
  border: 1px solid var(--line-strong);
  color: var(--ink);
  font-size: 12px;
  font-weight: 600;
  padding: 6px 13px;
  border-radius: 999px;
  box-shadow: 0 10px 22px -12px rgba(11, 61, 39, .25);
  opacity: 0;
  animation: tagIn .6s ease forwards, tagFloat 4s ease-in-out infinite;
}

.sas-tag::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green-500);
  margin-right: 6px;
  vertical-align: middle;
}

.sas-tag-1 {
  top: 6px;
  left: 6%;
  animation-delay: .3s, 1.2s;
}

.sas-tag-2 {
  top: 14px;
  right: 2%;
  animation-delay: .6s, 1.6s;
}

.sas-tag-3 {
  bottom: 2px;
  left: 32%;
  animation-delay: .9s, 2s;
}

@keyframes tagIn {
  to {
    opacity: 1;
  }
}

@keyframes tagFloat {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-7px);
  }
}

@media (max-width:900px) {
  .sas-tag-1 {
    left: 2%;
  }

  .sas-tag-2 {
    right: 0;
  }

  .sas-tag-3 {
    left: 38%;
  }
}


/* enlarge + recenter the shared orbit rings specifically for the hero security visual */
.sas-visual .phi-ring-1 {
  width: 190px;
  height: 190px;
}

.sas-visual .phi-ring-2 {
  width: 240px;
  height: 240px;
}

.sas-visual .phi-ring-3 {
  width: 280px;
  height: 280px;
}

/* ---------- INDOOR WIRELESS: 4-column feature grid variant ---------- */
.indoor-quad {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width:960px) {
  .indoor-quad {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width:560px) {
  .indoor-quad {
    grid-template-columns: 1fr;
  }
}

/* ---------- signal-propagation hero visual (indoor wireless) ---------- */
.signal-visual {
  position: relative;
  height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 10px 0 26px;
}

.signal-ping {
  position: absolute;
  border-radius: 50%;
  border: 2px solid var(--green-400);
  width: 84px;
  height: 84px;
  opacity: 0;
  animation: pingOut 3s cubic-bezier(.15, .6, .4, 1) infinite;
}

.signal-ping-1 {
  animation-delay: 0s;
}

.signal-ping-2 {
  animation-delay: 1s;
}

.signal-ping-3 {
  animation-delay: 2s;
}

@keyframes pingOut {
  0% {
    width: 84px;
    height: 84px;
    opacity: .85;
    border-width: 3px;
  }

  85% {
    opacity: 0;
  }

  100% {
    width: 300px;
    height: 300px;
    opacity: 0;
    border-width: 1px;
  }
}

.signal-hub {
  position: relative;
  z-index: 3;
  width: 86px;
  height: 86px;
  border-radius: 22px;
  background: linear-gradient(160deg, #fff, var(--deep-50));
  border: 1px solid var(--line-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 20px 40px -18px rgba(11, 61, 39, .28), inset 0 1px 0 rgba(255, 255, 255, .7);
  animation: hubBreathe 3s ease-in-out infinite;
}

.signal-hub svg {
  width: 36px;
  height: 36px;
  stroke: var(--green-600);
}

@keyframes hubBreathe {

  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.06);
  }
}

.signal-device {
  position: absolute;
  z-index: 2;
  width: 46px;
  height: 46px;
  border-radius: 13px;
  background: #fff;
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 12px 24px -16px rgba(11, 61, 39, .2);
  animation: deviceGlow 3s ease-in-out infinite;
}

.signal-device svg {
  stroke: var(--text-dim);
  width: 20px;
  height: 20px;
  transition: stroke .3s;
}

@keyframes deviceGlow {

  0%,
  12%,
  100% {
    border-color: var(--line);
    box-shadow: 0 12px 24px -16px rgba(11, 61, 39, .2);
  }

  4% {
    border-color: var(--green-500);
    box-shadow: 0 0 0 7px rgba(52, 209, 124, .22), 0 12px 24px -16px rgba(11, 61, 39, .2);
  }
}

.signal-device.dev-phone {
  top: 18px;
  left: 20%;
  animation-delay: .3s;
}

.signal-device.dev-laptop {
  top: 26px;
  right: 16%;
  animation-delay: 1.3s;
}

.signal-device.dev-cam {
  bottom: 10px;
  left: 44%;
  animation-delay: 2.3s;
}

@media (max-width:900px) {
  .signal-device.dev-phone {
    left: 6%;
  }

  .signal-device.dev-laptop {
    right: 4%;
  }
}

/* ---------- signal-strength meter hero visual (v2, indoor wireless) ---------- */
.meter-visual {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 26px;
  margin: 14px 0 30px;
}

.meter-ap {
  position: relative;
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: linear-gradient(160deg, #fff, var(--deep-50));
  border: 1px solid var(--line-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 16px 32px -16px rgba(11, 61, 39, .28);
}

.meter-ap svg {
  width: 28px;
  height: 28px;
  stroke: var(--green-600);
}

.meter-ap-dot {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green-500);
}

.meter-ap-dot::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--green-500);
  animation: quickPing 2s ease-out infinite;
}

.meter-zones {
  display: flex;
  gap: 44px;
  align-items: flex-end;
}

.meter-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.meter-bars {
  display: flex;
  align-items: flex-end;
  gap: 5px;
  height: 64px;
}

.meter-bars span {
  display: block;
  width: 9px;
  border-radius: 3px;
  background: var(--line-strong);
  height: calc(16px + (var(--i) * 14px));
  animation: barFill 2.4s ease-in-out infinite;
  animation-delay: calc(var(--i) * .15s);
}

.meter-zone:nth-child(1) .meter-bars span {
  animation-delay-base: 0s;
}

.meter-zone:nth-child(2) .meter-bars span {}

.meter-zone:nth-child(1) .meter-bars span {
  animation-delay: calc(var(--i) * .15s + 0s);
}

.meter-zone:nth-child(2) .meter-bars span {
  animation-delay: calc(var(--i) * .15s + .5s);
}

.meter-zone:nth-child(3) .meter-bars span {
  animation-delay: calc(var(--i) * .15s + 1s);
}

@keyframes barFill {

  0%,
  100% {
    background: var(--line-strong);
    box-shadow: none;
  }

  35% {
    background: var(--green-500);
    box-shadow: 0 0 10px rgba(52, 209, 124, .4);
  }

  70% {
    background: var(--green-500);
  }
}

.meter-label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-dim);
}

@media (max-width:900px) {
  .meter-zones {
    gap: 26px;
  }
}

@media (max-width:640px) {
  .meter-zones {
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px 30px;
  }
}

/* ---------- mesh network hero visual (v3, indoor wireless) ---------- */
.mesh-visual {
  position: relative;
  max-width: 420px;
  margin: 10px auto 26px;
}

.mesh-svg {
  width: 100%;
  height: auto;
  display: block;
  overflow: visible;
}

.mesh-line {
  stroke: var(--line-strong);
  stroke-width: 2;
  stroke-dasharray: 6 7;
  stroke-linecap: round;
  animation: meshFlow 1.1s linear infinite;
}

@keyframes meshFlow {
  to {
    stroke-dashoffset: -26;
  }
}

.mesh-hub-ring {
  fill: none;
  stroke: var(--line-strong);
  stroke-width: 1.4;
}

.mesh-hub {
  fill: #fff;
  stroke: var(--green-600);
  stroke-width: 2;
}

.mesh-hub-icon {
  position: absolute;
  left: 50%;
  top: 50.8%;
  transform: translate(-50%, -50%);
  width: 34px;
  height: 34px;
}

.mesh-hub-icon svg {
  width: 100%;
  height: 100%;
  stroke: var(--green-600);
}

.mesh-sat {
  fill: #fff;
  stroke: var(--line-strong);
  stroke-width: 2;
  transform-origin: center;
  transform-box: fill-box;
  animation: satPulse 2.4s ease-in-out infinite;
  animation-delay: var(--d);
}

@keyframes satPulse {

  0%,
  100% {
    stroke: var(--line-strong);
    transform: scale(1);
  }

  40% {
    stroke: var(--green-500);
    transform: scale(1.22);
  }
}

.mesh-label {
  fill: var(--text-dim);
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  font-weight: 600;
}

/* ---------- building cross-section hero visual (v4, indoor wireless) ---------- */
.floor-visual {
  max-width: 360px;
  margin: 6px auto 26px;
  display: flex;
  flex-direction: column;
}

.floor-card {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 18px;
}

.floor-card-ap {
  border-color: var(--green-500);
  background: linear-gradient(160deg, #fff, var(--deep-50));
  box-shadow: 0 14px 30px -18px rgba(11, 61, 39, .28);
  gap: 12px;
  justify-content: flex-start;
}

.floor-ap-icon {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--green-600);
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
}

.floor-ap-icon svg {
  width: 18px;
  height: 18px;
  stroke: #fff;
}

.floor-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
}

.floor-bars {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 16px;
}

.floor-bars i {
  display: block;
  width: 4px;
  border-radius: 2px;
  background: var(--line-strong);
}

.floor-bars i:nth-child(1) {
  height: 6px;
}

.floor-bars i:nth-child(2) {
  height: 11px;
}

.floor-bars i:nth-child(3) {
  height: 16px;
}

.floor-glow {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(52, 209, 124, .18), transparent);
  opacity: 0;
  transform: translateX(-100%);
}

.floor-glow-up {
  animation: floorLightUp 3.4s ease-in-out infinite;
}

.floor-glow-down {
  animation: floorLightDown 3.4s ease-in-out infinite;
}

@keyframes floorLightUp {

  0%,
  20% {
    opacity: 0;
    transform: translateX(-100%);
  }

  32% {
    opacity: 1;
    transform: translateX(0%);
  }

  55%,
  100% {
    opacity: 0;
    transform: translateX(100%);
  }
}

@keyframes floorLightDown {

  0%,
  50% {
    opacity: 0;
    transform: translateX(-100%);
  }

  62% {
    opacity: 1;
    transform: translateX(0%);
  }

  85%,
  100% {
    opacity: 0;
    transform: translateX(100%);
  }
}

.floor-card:hover .floor-bars i {
  background: var(--green-500);
}

.floor-connector {
  position: relative;
  height: 34px;
  width: 2px;
  margin: 0 auto;
  background: var(--line-strong);
}

.floor-dot {
  position: absolute;
  left: 50%;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green-500);
  transform: translateX(-50%);
  box-shadow: 0 0 8px rgba(52, 209, 124, .6);
}

.floor-dot-up {
  top: 100%;
  animation: dotUp 3.4s ease-in-out infinite;
}

.floor-dot-down {
  top: 0%;
  animation: dotDown 3.4s ease-in-out infinite;
}

@keyframes dotUp {

  0%,
  20% {
    top: 100%;
    opacity: 0;
  }

  22% {
    opacity: 1;
  }

  38% {
    top: 0%;
    opacity: 1;
  }

  42%,
  100% {
    opacity: 0;
  }
}

@keyframes dotDown {

  0%,
  50% {
    top: 0%;
    opacity: 0;
  }

  52% {
    opacity: 1;
  }

  68% {
    top: 100%;
    opacity: 1;
  }

  72%,
  100% {
    opacity: 0;
  }
}

/* ---------- fanned tier-card deck hero visual (v2, multitier) ---------- */
.tier-stack {
  position: relative;
  height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 14px 0 30px;
}

.tier-card {
  position: absolute;
  width: 236px;
  padding: 16px 20px;
  border-radius: 18px;
  background: #fff;
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: 0 22px 44px -22px rgba(11, 61, 39, .26);
  animation: tierFloat 4.5s ease-in-out infinite;
}

.tier-card-1 {
  transform: translateY(-58px) rotate(-7deg);
  z-index: 1;
  animation-delay: 0s;
}

.tier-card-2 {
  transform: translateY(0) rotate(0deg);
  z-index: 3;
  border-color: var(--green-500);
  box-shadow: 0 26px 52px -20px rgba(11, 61, 39, .32);
  animation-delay: .3s;
}

.tier-card-3 {
  transform: translateY(58px) rotate(7deg);
  z-index: 2;
  animation-delay: .6s;
}

@keyframes tierFloat {

  0%,
  100% {}

  50% {
    transform: translateY(var(--fy, 0)) rotate(var(--fr, 0)) translateX(0) scale(1) translateY(-6px);
  }
}

.tier-card-1 {
  --fy: -58px;
  --fr: -7deg;
}

.tier-card-2 {
  --fy: 0px;
  --fr: 0deg;
}

.tier-card-3 {
  --fy: 58px;
  --fr: 7deg;
}

@keyframes tierFloat {

  0%,
  100% {
    transform: translateY(var(--fy)) rotate(var(--fr));
  }

  50% {
    transform: translateY(calc(var(--fy) - 8px)) rotate(var(--fr));
  }
}

.tier-ico {
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: var(--deep-50);
  display: flex;
  align-items: center;
  justify-content: center;
}

.tier-card-2 .tier-ico {
  background: var(--green-600);
}

.tier-ico svg {
  width: 19px;
  height: 19px;
  stroke: var(--green-600);
}

.tier-card-2 .tier-ico svg {
  stroke: #fff;
}

.tier-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

.tier-packet {
  position: absolute;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--green-500);
  box-shadow: 0 0 10px rgba(52, 209, 124, .7);
  animation: tierPacket 3.6s ease-in-out infinite;
}

@keyframes tierPacket {
  0% {
    left: 16%;
    top: 14%;
    opacity: 0;
  }

  8% {
    opacity: 1;
  }

  30% {
    left: 82%;
    top: 44%;
    opacity: 1;
  }

  38% {
    opacity: 0;
  }

  40% {
    left: 16%;
    top: 44%;
    opacity: 0;
  }

  48% {
    opacity: 1;
  }

  68% {
    left: 82%;
    top: 76%;
    opacity: 1;
  }

  76% {
    opacity: 0;
  }

  100% {
    opacity: 0;
  }
}

@media (max-width:900px) {
  .tier-stack {
    height: 260px;
  }

  .tier-card {
    width: 200px;
  }
}

/* ---------- layered network-topology hero visual (v3, multitier) ---------- */
.net-visual {
  position: relative;
  max-width: 340px;
  margin: 10px auto 26px;
}

.net-svg {
  width: 100%;
  height: auto;
  display: block;
  overflow: visible;
}

.net-trunk {
  stroke: var(--line-strong);
  stroke-width: 2;
  stroke-dasharray: 6 7;
  stroke-linecap: round;
  animation: meshFlow 1s linear infinite;
}

.net-branch {
  stroke: var(--line-strong);
  stroke-width: 1.6;
}

.net-sat {
  fill: #fff;
  stroke: var(--line-strong);
  stroke-width: 2;
  transform-origin: center;
  transform-box: fill-box;
  animation: satPulse 2.6s ease-in-out infinite;
  animation-delay: var(--d);
}

.net-hub {
  fill: #fff;
  stroke: var(--green-600);
  stroke-width: 2.4;
}

.net-hub-2 {
  fill: var(--green-600);
  stroke: var(--green-600);
}

.net-icon {
  position: absolute;
  width: 26px;
  height: 26px;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.net-icon svg {
  width: 16px;
  height: 16px;
  stroke: var(--green-600);
}

.net-icon-2 svg {
  stroke: #fff;
}

.net-icon-1 {
  left: 50%;
  top: 12.5%;
}

.net-icon-2 {
  left: 50%;
  top: 50%;
}

.net-icon-3 {
  left: 50%;
  top: 87.5%;
}

.net-label {
  position: absolute;
  left: calc(50% + 30px);
  transform: translateY(-50%);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 13px;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--ink);
  box-shadow: 0 10px 22px -14px rgba(11, 61, 39, .22);
  white-space: nowrap;
}

.net-label-1 {
  top: 12.5%;
}

.net-label-2 {
  top: 50%;
  border-color: var(--green-500);
  color: var(--green-600);
}

.net-label-3 {
  top: 87.5%;
}

@media (max-width:900px) {
  .net-label {
    left: calc(50% + 22px);
    font-size: 10.5px;
    padding: 5px 10px;
  }
}

/* ---------- core-switch hub-and-spoke hero visual ---------- */
.core-visual {
  position: relative;
  max-width: 320px;
  margin: 10px auto 28px;
}

.core-svg {
  width: 100%;
  height: auto;
  display: block;
  overflow: visible;
}

.core-spoke {
  stroke: var(--green-500);
  stroke-width: 2.4;
  stroke-dasharray: 6 7;
  stroke-linecap: round;
  opacity: .65;
  animation: meshFlow 1s linear infinite;
}

.core-router {
  fill: #fff;
  stroke: var(--green-600);
  stroke-width: 2.4;
  transform-origin: center;
  transform-box: fill-box;
  filter: drop-shadow(0 6px 14px rgba(11, 61, 39, .18));
  animation: satPulse 2.6s ease-in-out infinite;
  animation-delay: var(--d);
}

.core-hub {
  fill: #fff;
  stroke: var(--green-600);
  stroke-width: 3;
  filter: drop-shadow(0 10px 22px rgba(11, 61, 39, .28));
}

.core-hub-icon {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 34px;
  height: 34px;
}

.core-hub-icon svg {
  width: 100%;
  height: 100%;
  stroke: var(--green-600);
}

.core-center-label {
  position: absolute;
  left: 50%;
  top: calc(50% + 30px);
  transform: translateX(-50%);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .07em;
  color: var(--green-600);
  text-shadow: 0 1px 0 #fff;
}

.core-tag {
  position: absolute;
  background: #fff;
  border: 1.5px solid var(--green-500);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 11.5px;
  font-weight: 700;
  color: var(--ink);
  box-shadow: 0 10px 22px -12px rgba(11, 61, 39, .3);
}

.core-tag::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green-500);
  margin-right: 6px;
  vertical-align: middle;
  box-shadow: 0 0 6px rgba(52, 209, 124, .6);
}

.core-tag-1 {
  left: 50%;
  top: 2%;
  transform: translateX(-50%);
}

.core-tag-2 {
  right: 0%;
  top: 47%;
}

.core-tag-3 {
  left: 50%;
  bottom: 0%;
  transform: translateX(-50%);
}

.core-tag-4 {
  left: 0%;
  top: 47%;
}

@media (max-width:900px) {
  .core-visual {
    max-width: 280px;
  }
}

/* ---------- vs comparison cards ---------- */
.vs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}

.vs-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px 24px;
  transition: transform .25s, box-shadow .25s;
}

.vs-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 22px 44px -26px rgba(11, 61, 39, .24);
}

.vs-badge {
  display: inline-flex;
  padding: 7px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  background: var(--deep-50);
  color: var(--green-600);
  margin-bottom: 14px;
}

.vs-badge-alt {
  background: var(--green-600);
  color: #fff;
}

.vs-card p {
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.65;
}

@media (max-width:640px) {
  .vs-grid {
    grid-template-columns: 1fr;
  }
}