:root {
  color-scheme: dark;
  --bg: #05070a;
  --bg-soft: #090d12;
  --panel: rgba(16, 22, 30, 0.7);
  --panel-strong: rgba(18, 25, 34, 0.9);
  --line: rgba(170, 194, 220, 0.16);
  --line-bright: rgba(79, 195, 247, 0.36);
  --text: #f4f7fb;
  --muted: #b8c2ce;
  --subtle: #8290a0;
  --blue: #4fc3f7;
  --blue-deep: #0a84ff;
  --silver: #d6dde7;
  --max: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 72% 18%, rgba(79, 195, 247, 0.13), transparent 30rem),
    radial-gradient(circle at 20% 0%, rgba(214, 221, 231, 0.1), transparent 24rem),
    linear-gradient(180deg, #05070a 0%, #070a0f 45%, #05070a 100%);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

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

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(170, 194, 220, 0.12);
  background: rgba(5, 7, 10, 0.82);
  backdrop-filter: blur(18px);
}

.nav-shell {
  align-items: center;
  display: flex;
  gap: 28px;
  justify-content: space-between;
  margin: 0 auto;
  max-width: var(--max);
  min-height: 76px;
  padding: 0 24px;
}

.brand-link {
  align-items: center;
  display: inline-flex;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  border: 1px solid rgba(214, 221, 231, 0.28);
  border-radius: 8px;
  box-shadow: 0 0 28px rgba(79, 195, 247, 0.12);
  height: 44px;
  object-fit: cover;
  width: 44px;
}

.brand-name {
  color: var(--text);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1;
}

.nav-links {
  align-items: center;
  display: flex;
  gap: 22px;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0;
  transition: color 160ms ease;
}

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

.section-band {
  position: relative;
}

.section-inner {
  margin: 0 auto;
  max-width: var(--max);
  padding: 0 24px;
  position: relative;
  width: 100%;
}

.hero {
  isolation: isolate;
  overflow: hidden;
}

.hero::after {
  background:
    linear-gradient(90deg, rgba(5, 7, 10, 0.96) 0%, rgba(5, 7, 10, 0.74) 42%, rgba(5, 7, 10, 0.36) 100%),
    linear-gradient(180deg, rgba(5, 7, 10, 0.18) 0%, #05070a 100%);
  content: "";
  inset: 0;
  position: absolute;
  z-index: -1;
}

.hero-bg {
  background-image: url("./assets/vyroven-desktop-logo.png");
  background-position: center right;
  background-repeat: no-repeat;
  background-size: cover;
  filter: saturate(0.92) contrast(1.05);
  inset: 0;
  opacity: 0.74;
  position: absolute;
  z-index: -2;
}

.hero-inner {
  max-width: var(--max);
  padding-bottom: 58px;
  padding-top: 72px;
}

.eyebrow {
  color: var(--blue);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0;
  margin-bottom: 14px;
  text-transform: uppercase;
}

.hero h1 {
  color: var(--text);
  font-size: 4.6rem;
  font-weight: 800;
  letter-spacing: 0;
  line-height: 0.95;
  margin-bottom: 20px;
  max-width: 700px;
  text-shadow: 0 0 34px rgba(79, 195, 247, 0.18);
}

.hero-tagline {
  color: var(--silver);
  font-size: 1.42rem;
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.25;
  margin-bottom: 18px;
  max-width: 740px;
}

.hero-copy {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 660px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  align-items: center;
  border-radius: 8px;
  display: inline-flex;
  font-size: 0.95rem;
  font-weight: 800;
  justify-content: center;
  letter-spacing: 0;
  min-height: 48px;
  padding: 0 20px;
  transition:
    border-color 160ms ease,
    background 160ms ease,
    color 160ms ease,
    transform 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-deep) 100%);
  box-shadow: 0 18px 48px rgba(10, 132, 255, 0.22);
  color: #031018;
}

.button-secondary {
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid var(--line-bright);
  color: var(--text);
}

.about-section,
.build-section,
.edge-section,
.principles-section,
.vision-section,
.contact-section {
  padding: 88px 0;
}

.about-section {
  background:
    linear-gradient(180deg, rgba(8, 12, 17, 0.94), rgba(5, 7, 10, 0.96)),
    radial-gradient(circle at 80% 16%, rgba(79, 195, 247, 0.08), transparent 24rem);
  border-top: 1px solid rgba(170, 194, 220, 0.08);
}

.split-layout {
  align-items: start;
  display: grid;
  gap: 48px;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.15fr);
}

h2 {
  color: var(--text);
  font-size: 2.35rem;
  font-weight: 800;
  letter-spacing: 0;
  line-height: 1.08;
}

.copy-stack {
  color: var(--muted);
  display: grid;
  gap: 18px;
  font-size: 1.02rem;
}

.section-heading {
  margin-bottom: 34px;
  max-width: 720px;
}

.build-section {
  background:
    linear-gradient(180deg, #05070a 0%, #070b10 100%),
    radial-gradient(circle at 24% 12%, rgba(79, 195, 247, 0.08), transparent 24rem);
}

.feature-grid,
.capability-grid,
.principles-grid {
  display: grid;
  gap: 18px;
}

.feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-card,
.capability-card,
.principles-grid article,
.contact-panel {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.025)),
    var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.28);
}

.feature-card {
  min-height: 300px;
  overflow: hidden;
  padding: 28px;
  position: relative;
}

.card-accent {
  background: linear-gradient(90deg, var(--blue), transparent);
  height: 2px;
  left: 28px;
  position: absolute;
  right: 28px;
  top: 0;
}

h3 {
  color: var(--text);
  font-size: 1.16rem;
  font-weight: 800;
  letter-spacing: 0;
  line-height: 1.25;
}

.feature-card h3 {
  margin-bottom: 20px;
}

ul {
  color: var(--muted);
  display: grid;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
}

li {
  align-items: center;
  display: flex;
  gap: 10px;
}

li::before {
  background: var(--blue);
  border-radius: 999px;
  box-shadow: 0 0 18px rgba(79, 195, 247, 0.42);
  content: "";
  flex: 0 0 auto;
  height: 6px;
  width: 6px;
}

.edge-section {
  background:
    radial-gradient(circle at 76% 24%, rgba(79, 195, 247, 0.16), transparent 28rem),
    linear-gradient(180deg, #070b10 0%, #05070a 100%);
  border-bottom: 1px solid rgba(170, 194, 220, 0.08);
  border-top: 1px solid rgba(170, 194, 220, 0.08);
}

.edge-layout {
  align-items: center;
  display: grid;
  gap: 52px;
  grid-template-columns: minmax(220px, 340px) minmax(0, 1fr);
}

.edge-logo-wrap {
  align-items: center;
  display: flex;
  justify-content: center;
}

.edge-logo-wrap img {
  border: 1px solid rgba(214, 221, 231, 0.16);
  border-radius: 8px;
  box-shadow:
    0 0 60px rgba(79, 195, 247, 0.12),
    0 28px 80px rgba(0, 0, 0, 0.48);
  width: 100%;
}

.edge-content {
  color: var(--muted);
}

.edge-content h2,
.vision-copy h2,
.contact-layout h2 {
  margin-bottom: 20px;
}

.lead {
  color: var(--silver);
  font-size: 1.08rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.positioning-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.positioning-list span {
  background: rgba(79, 195, 247, 0.08);
  border: 1px solid rgba(79, 195, 247, 0.24);
  border-radius: 999px;
  color: var(--silver);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0;
  padding: 8px 12px;
}

.capability-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin-top: 34px;
}

.capability-card {
  min-height: 190px;
  padding: 22px;
}

.capability-card p,
.principles-grid p {
  color: var(--muted);
  font-size: 0.94rem;
  margin-top: 10px;
}

.principles-section {
  background:
    radial-gradient(circle at 18% 0%, rgba(214, 221, 231, 0.08), transparent 22rem),
    #05070a;
}

.principles-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.principles-grid article {
  min-height: 174px;
  padding: 24px;
}

.vision-section {
  background:
    linear-gradient(180deg, rgba(9, 13, 18, 0.88), rgba(5, 7, 10, 0.96)),
    radial-gradient(circle at 70% 0%, rgba(79, 195, 247, 0.1), transparent 24rem);
}

.vision-copy {
  max-width: 820px;
}

.vision-copy p:not(.eyebrow) {
  color: var(--muted);
  font-size: 1.08rem;
  margin-top: 16px;
}

.contact-section {
  background: #05070a;
}

.contact-layout {
  align-items: center;
  display: grid;
  gap: 42px;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 380px);
}

.contact-layout p {
  color: var(--muted);
  max-width: 620px;
}

.contact-panel {
  display: grid;
  gap: 16px;
  padding: 28px;
}

.contact-panel span {
  color: var(--subtle);
  font-size: 0.92rem;
  font-weight: 700;
}

.contact-email {
  color: var(--text);
  font-size: 1.16rem;
  font-weight: 800;
  overflow-wrap: anywhere;
}

.tester-section {
  background:
    radial-gradient(circle at 50% 0%, rgba(79, 195, 247, 0.16), transparent 30rem),
    linear-gradient(180deg, rgba(5, 7, 10, 0.96), #05070a);
  border-top: 1px solid rgba(170, 194, 220, 0.08);
  padding: 72px 0 82px;
}

.tester-inner {
  display: flex;
  justify-content: center;
}

.tester-card {
  align-items: center;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.075), rgba(255, 255, 255, 0.026)),
    rgba(13, 20, 29, 0.82);
  border: 1px solid rgba(79, 195, 247, 0.2);
  border-radius: 8px;
  box-shadow:
    0 0 54px rgba(79, 195, 247, 0.12),
    0 28px 90px rgba(0, 0, 0, 0.36);
  display: flex;
  flex-direction: column;
  max-width: 760px;
  padding: 46px;
  position: relative;
  text-align: center;
  width: 100%;
}

.tester-card::before {
  background: linear-gradient(90deg, transparent, rgba(79, 195, 247, 0.82), transparent);
  content: "";
  height: 1px;
  left: 42px;
  position: absolute;
  right: 42px;
  top: 0;
}

.tester-card h2 {
  margin-bottom: 16px;
}

.tester-card p:not(.eyebrow) {
  color: var(--muted);
  font-size: 1.08rem;
  margin-bottom: 28px;
  max-width: 600px;
}

.site-footer {
  border-top: 1px solid rgba(170, 194, 220, 0.1);
  color: var(--subtle);
  padding: 26px 0;
}

.footer-inner {
  align-items: center;
  display: flex;
  gap: 18px;
  justify-content: space-between;
}

.footer-inner span:first-child {
  color: var(--text);
  font-weight: 800;
}

@media (max-width: 980px) {
  .hero h1 {
    font-size: 3.6rem;
  }

  .hero-tagline {
    font-size: 1.22rem;
  }

  .split-layout,
  .edge-layout,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .feature-grid,
  .principles-grid {
    grid-template-columns: 1fr 1fr;
  }

  .capability-grid {
    grid-template-columns: 1fr 1fr;
  }

  .edge-logo-wrap {
    justify-content: flex-start;
    max-width: 280px;
  }
}

@media (max-width: 720px) {
  .nav-shell {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding-bottom: 16px;
    padding-top: 14px;
  }

  .nav-links {
    gap: 14px;
    overflow-x: auto;
    padding-bottom: 2px;
    width: 100%;
  }

  .nav-links a {
    flex: 0 0 auto;
    font-size: 0.88rem;
  }

  .hero::after {
    background:
      linear-gradient(180deg, rgba(5, 7, 10, 0.84) 0%, rgba(5, 7, 10, 0.7) 40%, #05070a 100%),
      linear-gradient(90deg, rgba(5, 7, 10, 0.84), rgba(5, 7, 10, 0.34));
  }

  .hero-bg {
    background-position: center top;
    opacity: 0.56;
  }

  .hero-inner {
    padding-bottom: 50px;
    padding-top: 48px;
  }

  .hero h1 {
    font-size: 3rem;
  }

  .hero-tagline {
    font-size: 1.12rem;
  }

  .hero-copy,
  .copy-stack,
  .vision-copy p:not(.eyebrow) {
    font-size: 1rem;
  }

  h2 {
    font-size: 2rem;
  }

  .about-section,
  .build-section,
  .edge-section,
  .principles-section,
  .vision-section,
  .contact-section,
  .tester-section {
    padding: 64px 0;
  }

  .feature-grid,
  .principles-grid,
  .capability-grid {
    grid-template-columns: 1fr;
  }

  .feature-card {
    min-height: 0;
  }

  .button {
    width: 100%;
  }

  .contact-panel {
    padding: 24px;
  }

  .tester-card {
    padding: 32px 24px;
  }

  .tester-card p:not(.eyebrow) {
    font-size: 1rem;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 540px) {
  .section-inner,
  .nav-shell {
    margin-left: 0;
    margin-right: auto;
    max-width: 430px;
  }
}

@media (max-width: 430px) {
  .section-inner,
  .nav-shell {
    padding-left: 18px;
    padding-right: 18px;
  }

  .brand-mark {
    height: 40px;
    width: 40px;
  }

  .hero h1 {
    font-size: 2.65rem;
  }

  h2 {
    font-size: 1.78rem;
  }

  .positioning-list span {
    width: 100%;
  }
}