:root {
  color-scheme: dark;
  --ink: #050607;
  --carbon: #0c1015;
  --panel: #151b23;
  --panel-2: #202833;
  --text: #f7fafc;
  --muted: #aeb8c5;
  --paper: #f4f6f8;
  --paper-2: #ffffff;
  --paper-text: #141820;
  --paper-muted: #5f6977;
  --line: rgba(255, 255, 255, 0.12);
  --line-dark: rgba(20, 24, 32, 0.12);
  --cyan: #08c8f6;
  --blue: #096db6;
  --red: #e5242a;
  --lime: #92f36f;
  --amber: #ffb545;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.32);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

main,
section {
  scroll-margin-top: 96px;
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  line-height: 1.5;
  letter-spacing: 0;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  content: "";
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(180deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    #050607;
  background-size: 58px 58px;
}

body::after {
  position: fixed;
  inset: 0;
  z-index: -1;
  content: "";
  pointer-events: none;
  background:
    linear-gradient(115deg, rgba(8, 200, 246, 0.11), transparent 36%),
    linear-gradient(180deg, rgba(5, 6, 7, 0.08), #050607 72%);
}

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

button,
select {
  font: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 14px 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(5, 6, 7, 0.88);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 150px;
  font-weight: 950;
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: #fff;
}

.brand span {
  font-size: 1.08rem;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  color: var(--muted);
  font-size: 0.95rem;
}

.nav-links a {
  transition: color 180ms ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--text);
}

.header-cta,
.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-weight: 900;
  white-space: nowrap;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    border-color 180ms ease,
    background 180ms ease;
}

.header-cta,
.primary-button {
  color: #041014;
  background: linear-gradient(90deg, var(--cyan), var(--lime));
  box-shadow: 0 14px 38px rgba(8, 200, 246, 0.22);
}

.secondary-button {
  border-color: rgba(255, 255, 255, 0.18);
  color: var(--text);
  background: rgba(255, 255, 255, 0.07);
}

.header-cta:hover,
.primary-button:hover,
.secondary-button:hover,
.header-cta:focus-visible,
.primary-button:focus-visible,
.secondary-button:focus-visible {
  transform: translateY(-2px);
}

.secondary-button:hover,
.secondary-button:focus-visible {
  border-color: rgba(8, 200, 246, 0.46);
}

.hero-primary {
  min-height: 50px;
  padding-inline: 24px;
  font-size: 1rem;
}

.hero-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
  align-items: center;
  gap: 56px;
  min-height: calc(88vh - 72px);
  padding: 58px 6vw 42px;
}

.hero-copy {
  max-width: 720px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 950;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 22px;
  font-size: 4rem;
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 16px;
  font-size: 2.65rem;
  line-height: 1.04;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 1.16rem;
  line-height: 1.2;
  letter-spacing: 0;
}

.hero-lead,
.section-heading p,
.compat-copy p,
.spark-copy p,
.contact-section p {
  color: var(--muted);
  font-size: 1.08rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 30px 0;
}

.hero-proof {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-proof span,
.compat-notes span,
.product-tag,
.price-pill {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.06);
  font-size: 0.88rem;
  font-weight: 800;
}

.hero-gallery {
  display: grid;
  gap: 18px;
}

.hero-device {
  position: relative;
  display: grid;
  min-height: 520px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), transparent 52%),
    #0b0f14;
  box-shadow: var(--shadow);
}

.hero-device::before {
  position: absolute;
  inset: 0;
  content: "";
  background:
    linear-gradient(90deg, rgba(8, 200, 246, 0.16), transparent 28% 72%, rgba(229, 36, 42, 0.14)),
    linear-gradient(180deg, transparent 62%, rgba(0, 0, 0, 0.46));
  pointer-events: none;
}

.hero-device img {
  width: 100%;
  height: 420px;
  object-fit: contain;
  padding: 42px;
  background: #fff;
  transition:
    opacity 260ms ease,
    transform 260ms ease;
}

.hero-badge {
  position: absolute;
  top: 18px;
  left: 18px;
  z-index: 2;
  min-height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  color: #061016;
  background: var(--cyan);
  font-size: 0.82rem;
  font-weight: 950;
  line-height: 34px;
}

.hero-device-info {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 6px;
  padding: 22px;
  background: linear-gradient(180deg, rgba(12, 16, 21, 0.88), #0c1015);
}

.hero-device-info strong {
  font-size: 1.45rem;
}

.hero-device-info span {
  color: var(--muted);
}

.hero-rail {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 8px;
}

.rail-item {
  display: grid;
  place-items: center;
  aspect-ratio: 1.15;
  padding: 6px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.07);
  cursor: pointer;
  opacity: 0.58;
  transition:
    opacity 180ms ease,
    transform 180ms ease,
    border-color 180ms ease;
}

.rail-item img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 6px;
  background: #fff;
}

.rail-item.active,
.rail-item:hover,
.rail-item:focus-visible {
  opacity: 1;
  border-color: rgba(8, 200, 246, 0.6);
  transform: translateY(-2px);
}

.signal-band {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  padding: 0 6vw;
  background: rgba(255, 255, 255, 0.08);
}

.signal-band article {
  min-height: 190px;
  padding: 34px;
  background: rgba(12, 16, 21, 0.95);
}

.signal-band span {
  display: block;
  margin-bottom: 10px;
  color: var(--amber);
  font-size: 0.85rem;
  font-weight: 950;
}

.signal-band strong {
  display: block;
  margin-bottom: 12px;
  font-size: 1.25rem;
}

.signal-band p {
  margin-bottom: 0;
  color: var(--muted);
}

.section {
  padding: 96px 6vw;
}

.section-heading {
  max-width: 860px;
  margin-bottom: 32px;
}

.problem-section {
  background:
    linear-gradient(180deg, rgba(229, 36, 42, 0.08), transparent 48%),
    #080a0d;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.problem-card {
  min-height: 260px;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.075), rgba(255, 255, 255, 0.035)),
    #0c1015;
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.18);
}

.problem-card span {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  margin-bottom: 18px;
  border-radius: 999px;
  color: #140b00;
  background: var(--amber);
  font-size: 0.78rem;
  font-weight: 950;
}

.problem-card strong {
  display: block;
  margin-bottom: 12px;
  font-size: 1.18rem;
  line-height: 1.22;
}

.problem-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.product-section,
.faq-section,
.spark-section {
  color: var(--paper-text);
  background: var(--paper);
}

.product-section .section-heading p,
.faq-section .section-heading p,
.spark-section p {
  color: var(--paper-muted);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 30px;
}

.filter-button {
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid var(--line-dark);
  border-radius: 999px;
  color: var(--paper-text);
  background: #fff;
  cursor: pointer;
  font-weight: 900;
  transition:
    color 180ms ease,
    background 180ms ease,
    transform 180ms ease,
    border-color 180ms ease;
}

.filter-button:hover,
.filter-button:focus-visible,
.filter-button.active {
  color: #041014;
  border-color: transparent;
  background: var(--cyan);
  transform: translateY(-1px);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.product-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  overflow: hidden;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 16px 38px rgba(20, 24, 32, 0.09);
  transition:
    transform 200ms ease,
    box-shadow 200ms ease,
    border-color 200ms ease;
}

.product-card:hover,
.product-card:focus-within {
  border-color: rgba(8, 200, 246, 0.55);
  box-shadow: 0 22px 52px rgba(20, 24, 32, 0.14);
  transform: translateY(-4px);
}

.product-media {
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: 1.08;
  padding: 16px;
  background:
    linear-gradient(180deg, rgba(20, 24, 32, 0.06), transparent),
    #f9fafb;
}

.product-media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 18px 18px rgba(20, 24, 32, 0.15));
}

.best-seller {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  min-height: 30px;
  padding: 0 10px;
  border-radius: 999px;
  color: #140b00;
  background: var(--amber);
  font-size: 0.78rem;
  font-weight: 950;
  line-height: 30px;
}

.product-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 18px;
}

.product-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.product-tag {
  min-height: 28px;
  border-color: rgba(20, 24, 32, 0.12);
  color: var(--paper-muted);
  background: #f1f4f7;
  font-size: 0.78rem;
}

.price-pill {
  min-height: 28px;
  color: #151922;
  border-color: rgba(255, 181, 69, 0.55);
  background: rgba(255, 181, 69, 0.18);
  font-size: 0.78rem;
}

.price-pill.pending {
  color: var(--paper-muted);
  border-color: rgba(20, 24, 32, 0.12);
  background: #f1f4f7;
}

.product-card h3 {
  color: var(--paper-text);
}

.product-card p {
  color: var(--paper-muted);
}

.card-summary {
  display: -webkit-box;
  min-height: 78px;
  margin-bottom: 18px;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.feature-list {
  display: grid;
  gap: 8px;
  padding: 0;
  margin: 0 0 18px;
  list-style: none;
}

.feature-list li {
  position: relative;
  padding-left: 16px;
  color: var(--paper-muted);
  font-size: 0.93rem;
}

.feature-list li::before {
  position: absolute;
  top: 0.63em;
  left: 0;
  width: 6px;
  height: 6px;
  content: "";
  border-radius: 50%;
  background: var(--cyan);
}

.card-actions {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  margin-top: auto;
}

.card-actions button,
.card-actions a {
  min-height: 42px;
  border-radius: var(--radius);
  font-weight: 950;
}

.card-actions button {
  border: 1px solid rgba(20, 24, 32, 0.14);
  color: var(--paper-text);
  background: #fff;
  cursor: pointer;
}

.card-actions a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 14px;
  color: #041014;
  background: var(--lime);
}

.comparison-section {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.035), transparent),
    #080a0d;
}

.use-case-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.use-case {
  min-height: 150px;
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  color: var(--text);
  background: rgba(255, 255, 255, 0.055);
  cursor: pointer;
  text-align: left;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background 180ms ease;
}

.use-case span {
  display: block;
  margin-bottom: 14px;
  color: var(--cyan);
  font-size: 0.85rem;
  font-weight: 950;
}

.use-case strong {
  display: block;
  font-size: 1.15rem;
  line-height: 1.2;
}

.use-case:hover,
.use-case:focus-visible,
.use-case.active {
  border-color: rgba(8, 200, 246, 0.62);
  background: rgba(8, 200, 246, 0.08);
  transform: translateY(-3px);
}

.recommendation-panel {
  display: grid;
  grid-template-columns: minmax(240px, 0.36fr) minmax(0, 1fr);
  gap: 28px;
  min-height: 320px;
  margin-top: 20px;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
}

.recommendation-panel img {
  width: 100%;
  height: 270px;
  object-fit: contain;
  border-radius: var(--radius);
  background: #fff;
}

.recommendation-panel p {
  color: var(--muted);
}

.recommendation-panel ul {
  display: grid;
  gap: 8px;
  padding: 0;
  list-style: none;
}

.recommendation-panel li {
  padding: 10px 12px;
  border-left: 3px solid var(--cyan);
  background: rgba(255, 255, 255, 0.055);
}

.spark-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 0.76fr);
  gap: 38px;
  align-items: center;
}

.spark-card {
  display: grid;
  grid-template-columns: 0.42fr 1fr;
  gap: 18px;
  align-items: center;
  padding: 18px;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 18px 44px rgba(20, 24, 32, 0.1);
}

.spark-card img {
  width: 100%;
  height: 210px;
  object-fit: contain;
  border-radius: var(--radius);
  background: #f7f8fa;
}

.spark-card span {
  display: inline-flex;
  min-height: 30px;
  padding: 0 10px;
  align-items: center;
  border-radius: 999px;
  color: #140b00;
  background: rgba(255, 181, 69, 0.2);
  font-size: 0.82rem;
  font-weight: 950;
}

.spark-card strong {
  display: block;
  margin: 12px 0 8px;
  font-size: 1.3rem;
}

.spark-card .secondary-button {
  color: var(--paper-text);
  border-color: var(--line-dark);
}

.buyer-section {
  color: var(--paper-text);
  background:
    linear-gradient(180deg, #ffffff, #f2f5f8);
}

.buyer-section .section-heading p {
  color: var(--paper-muted);
}

.buyer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.buyer-grid article {
  min-height: 190px;
  padding: 22px;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 14px 34px rgba(20, 24, 32, 0.07);
}

.buyer-grid strong {
  display: block;
  margin-bottom: 10px;
  font-size: 1.14rem;
}

.buyer-grid p {
  margin-bottom: 0;
  color: var(--paper-muted);
}

.compatibility-section {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(360px, 0.72fr);
  gap: 56px;
  align-items: center;
  background:
    linear-gradient(180deg, rgba(8, 200, 246, 0.05), transparent),
    #0c1015;
}

.compat-notes {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.compat-form {
  display: grid;
  gap: 14px;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: var(--shadow);
}

.compat-form label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 900;
}

.compat-form select {
  width: 100%;
  min-height: 48px;
  padding: 0 12px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 6px;
  color: var(--text);
  background: #090c11;
}

.compat-result {
  min-height: 112px;
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  background: #07090d;
}

.compat-result strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1.2rem;
}

.compat-result p {
  margin-bottom: 0;
  color: var(--muted);
}

.compat-result.high {
  border-color: rgba(146, 243, 111, 0.5);
  box-shadow: inset 0 0 0 1px rgba(146, 243, 111, 0.12);
}

.compat-result.medium {
  border-color: rgba(255, 181, 69, 0.58);
  box-shadow: inset 0 0 0 1px rgba(255, 181, 69, 0.12);
}

.compat-result.low {
  border-color: rgba(229, 36, 42, 0.58);
  box-shadow: inset 0 0 0 1px rgba(229, 36, 42, 0.12);
}

.full-button {
  width: 100%;
}

.truth-section {
  background: #fff;
  color: var(--paper-text);
}

.truth-section .section-heading p {
  color: var(--paper-muted);
}

.truth-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.truth-grid article {
  min-height: 190px;
  padding: 22px;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  background: #f5f7f9;
}

.truth-grid strong {
  display: block;
  margin-bottom: 10px;
  font-size: 1.18rem;
}

.truth-grid p {
  color: var(--paper-muted);
}

.cta-strip {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
  padding: 46px 6vw;
  border-top: 1px solid rgba(255, 255, 255, 0.09);
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
  background:
    linear-gradient(90deg, rgba(8, 200, 246, 0.14), rgba(146, 243, 111, 0.08)),
    #080a0d;
}

.cta-strip strong {
  display: block;
  margin-bottom: 6px;
  font-size: 1.65rem;
  line-height: 1.1;
}

.cta-strip span {
  display: block;
  max-width: 720px;
  color: var(--muted);
}

.faq-list {
  display: grid;
  gap: 12px;
  max-width: 980px;
}

details {
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  background: #fff;
}

summary {
  min-height: 58px;
  padding: 18px 20px;
  cursor: pointer;
  font-weight: 950;
}

details p {
  padding: 0 20px 20px;
  color: var(--paper-muted);
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 34px;
  align-items: center;
  padding: 70px 6vw;
  background:
    linear-gradient(90deg, rgba(8, 200, 246, 0.12), rgba(229, 36, 42, 0.08)),
    #080a0d;
}

.contact-section h2 {
  max-width: 840px;
}

.contact-section p {
  max-width: 760px;
}

.contact-section strong {
  color: var(--text);
}

.site-footer {
  display: grid;
  grid-template-columns: minmax(220px, 0.7fr) auto minmax(240px, 0.7fr);
  align-items: start;
  gap: 24px;
  padding: 36px 6vw;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--muted);
  background: #050607;
  font-size: 0.9rem;
}

.site-footer strong {
  display: block;
  margin-bottom: 6px;
  color: var(--text);
  font-weight: 950;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

.site-footer a {
  color: var(--cyan);
}

.footer-tech {
  text-align: right;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: none;
  place-items: center;
  padding: 24px;
  background: rgba(3, 5, 7, 0.76);
  backdrop-filter: blur(12px);
}

.modal-backdrop.open {
  display: grid;
}

.product-modal {
  display: grid;
  grid-template-columns: minmax(240px, 0.72fr) minmax(0, 1fr);
  gap: 28px;
  width: min(940px, 100%);
  max-height: 90vh;
  overflow: auto;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: var(--radius);
  background: #0c1015;
  box-shadow: var(--shadow);
}

.product-modal img {
  width: 100%;
  height: 360px;
  object-fit: contain;
  border-radius: var(--radius);
  background: #fff;
}

.product-modal p {
  color: var(--muted);
}

.modal-close {
  position: sticky;
  top: 0;
  justify-self: end;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 50%;
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 950;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 650ms ease,
    transform 650ms ease;
}

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

@media (max-width: 1180px) {
  .product-grid,
  .problem-grid,
  .buyer-grid,
  .truth-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .use-case-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 980px) {
  .site-header {
    align-items: flex-start;
    flex-wrap: wrap;
    padding: 14px 24px;
  }

  .nav-links {
    order: 3;
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: none;
  }

  .nav-links::-webkit-scrollbar {
    display: none;
  }

  .hero-section,
  .compatibility-section,
  .contact-section,
  .spark-section,
  .cta-strip,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .hero-section {
    gap: 30px;
    min-height: auto;
    padding-top: 54px;
  }

  h1 {
    font-size: 3.05rem;
  }

  h2 {
    font-size: 2.2rem;
  }

  .hero-device {
    min-height: 480px;
  }

  .signal-band {
    grid-template-columns: 1fr;
  }

  .recommendation-panel,
  .product-modal {
    grid-template-columns: 1fr;
  }

  .contact-section {
    align-items: start;
  }

  .site-footer nav {
    justify-content: flex-start;
  }

  .footer-tech {
    text-align: left;
  }
}

@media (max-width: 760px) {
  main,
  section {
    scroll-margin-top: 170px;
  }

  .header-cta {
    display: none;
  }

  .brand {
    min-width: 0;
  }

  .hero-section,
  .section,
  .comparison-section {
    padding-left: 20px;
    padding-right: 20px;
  }

  .hero-actions {
    display: grid;
  }

  .hero-proof span,
  .compat-notes span {
    width: 100%;
  }

  h1 {
    font-size: 2.42rem;
  }

  h2 {
    font-size: 1.92rem;
  }

  .hero-device {
    min-height: 420px;
  }

  .hero-device img {
    height: 300px;
    padding: 28px;
  }

  .hero-rail {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .product-grid,
  .problem-grid,
  .buyer-grid,
  .use-case-grid,
  .truth-grid {
    grid-template-columns: 1fr;
  }

  .spark-card {
    grid-template-columns: 1fr;
  }

  .compat-form {
    padding: 18px;
  }

  .cta-strip {
    padding-left: 20px;
    padding-right: 20px;
  }

  .site-footer {
    flex-direction: column;
  }
}

@media (max-width: 430px) {
  .site-header {
    padding-left: 16px;
    padding-right: 16px;
  }

  .nav-links {
    gap: 14px;
    font-size: 0.85rem;
  }

  .hero-section,
  .section,
  .comparison-section {
    padding-left: 16px;
    padding-right: 16px;
  }

  h1 {
    font-size: 2.14rem;
  }

  h2 {
    font-size: 1.68rem;
  }

  .signal-band {
    padding-left: 16px;
    padding-right: 16px;
  }

  .signal-band article {
    padding: 26px;
  }

  .card-actions {
    grid-template-columns: 1fr;
  }
}

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