:root {
  color-scheme: dark;
  --bg: #05070d;
  --bg-soft: #0c1020;
  --card: rgba(255, 255, 255, 0.07);
  --card-strong: rgba(255, 255, 255, 0.12);
  --text: #f7f8ff;
  --muted: #a9b0c7;
  --line: rgba(255, 255, 255, 0.12);
  --blue: #7dd3fc;
  --violet: #a78bfa;
  --green: #8cf4c9;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 20% 10%, rgba(125, 211, 252, 0.24), transparent 32rem),
    radial-gradient(circle at 80% 0%, rgba(167, 139, 250, 0.22), transparent 34rem),
    linear-gradient(180deg, #05070d 0%, #08101c 48%, #05070d 100%);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

button,
input,
textarea {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

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

p {
  color: var(--muted);
  line-height: 1.7;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: rgba(5, 7, 13, 0.78);
  backdrop-filter: blur(18px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 18px 0;
}

.brand,
.nav-links,
.trust-row,
.hero-actions,
.card-header {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  background: linear-gradient(135deg, var(--blue), var(--violet));
  color: #03101b;
  box-shadow: 0 12px 40px rgba(125, 211, 252, 0.25);
}

.nav-links {
  gap: 26px;
  color: var(--muted);
  font-size: 0.95rem;
}

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

.nav-cta {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  padding: 10px 16px;
  color: var(--text);
  font-weight: 700;
}

.section {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 78px 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
  gap: 64px;
  align-items: center;
  min-height: calc(100vh - 72px);
  padding-top: 74px;
}

.eyebrow {
  margin-bottom: 14px;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2 {
  letter-spacing: -0.06em;
  line-height: 0.96;
}

h1 {
  max-width: 780px;
  margin-bottom: 24px;
  font-size: clamp(2.6rem, 6.2vw, 5.2rem);
}

h2 {
  margin-bottom: 20px;
  font-size: clamp(2.3rem, 5vw, 4.7rem);
}

h3 {
  margin-bottom: 12px;
  color: var(--text);
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

.hero-copy {
  max-width: 640px;
  font-size: 1.14rem;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border-radius: 999px;
  padding: 0 22px;
  font-weight: 800;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: linear-gradient(135deg, var(--blue), var(--violet));
  color: #06111e;
}

.button-secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
}

.trust-row {
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

.trust-row span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 12px;
  color: var(--muted);
  font-size: 0.9rem;
}

.agent-card,
.feature-card,
.popup-card,
.a2a-card,
.steps article {
  border: 1px solid var(--line);
  background: var(--card);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
}

.agent-card {
  position: relative;
  overflow: hidden;
  border-radius: 32px;
  padding: 20px;
}

.agent-card::before {
  position: absolute;
  inset: -2px;
  z-index: -1;
  background: radial-gradient(circle at top right, rgba(125, 211, 252, 0.35), transparent 22rem);
  content: "";
}

.card-header {
  justify-content: space-between;
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 24px var(--green);
}

.chat-thread {
  display: grid;
  gap: 14px;
}

.message {
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 16px;
  color: #dfe5ff;
  line-height: 1.55;
}

.message span {
  display: block;
  margin-bottom: 6px;
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 800;
}

.message.agent {
  background: rgba(125, 211, 252, 0.1);
}

.message.user {
  margin-left: 34px;
  background: rgba(167, 139, 250, 0.1);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
  gap: 52px;
  align-items: start;
}

.feature-grid,
.popup-grid,
.steps,
.timeline {
  display: grid;
  gap: 18px;
}

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

.feature-card,
.popup-card,
.steps article {
  border-radius: 24px;
  padding: 24px;
}

.feature-card p,
.popup-card p,
.steps p {
  margin-bottom: 0;
}

.section-heading {
  max-width: 780px;
  margin-bottom: 34px;
}

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

.timeline article {
  position: relative;
  border-top: 1px solid var(--line);
  padding-top: 24px;
}

.timeline span,
.steps span,
.popup-card span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  color: var(--green);
  font-weight: 800;
}

.timeline span,
.steps span {
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: rgba(140, 244, 201, 0.08);
}

.popup-section {
  width: min(1220px, calc(100% - 40px));
}

.popup-card {
  min-height: 176px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.045)),
    var(--card);
}

.popup-card span {
  justify-content: flex-start;
  color: var(--blue);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.popup-card h3 {
  font-size: clamp(1.4rem, 3vw, 2.25rem);
  letter-spacing: -0.05em;
}

.a2a-card {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr);
  gap: 42px;
  align-items: center;
  border-radius: 34px;
  padding: clamp(28px, 6vw, 56px);
  background:
    radial-gradient(circle at 100% 0%, rgba(167, 139, 250, 0.3), transparent 26rem),
    var(--card);
}

.a2a-flow {
  display: grid;
  gap: 16px;
}

.a2a-flow div {
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 18px;
  background: rgba(5, 7, 13, 0.36);
  color: #edf2ff;
  font-weight: 800;
}

.a2a-flow span {
  width: 2px;
  height: 24px;
  margin-left: 24px;
  background: linear-gradient(var(--blue), var(--violet));
}

.network-section {
  padding-top: 30px;
}

.network-card {
  position: relative;
  min-height: 520px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 34px;
  background:
    radial-gradient(circle at 50% 48%, rgba(140, 244, 201, 0.18), transparent 16rem),
    radial-gradient(circle at 70% 20%, rgba(167, 139, 250, 0.2), transparent 22rem),
    rgba(255, 255, 255, 0.055);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
}

.network-node {
  position: absolute;
  z-index: 2;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  background: rgba(5, 7, 13, 0.78);
  color: var(--text);
  text-align: center;
  font-weight: 800;
}

.core-node {
  top: 50%;
  left: 50%;
  width: 250px;
  height: 250px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  align-content: center;
  gap: 10px;
  background:
    radial-gradient(circle at 35% 20%, rgba(255, 255, 255, 0.18), transparent 6rem),
    linear-gradient(135deg, rgba(125, 211, 252, 0.3), rgba(167, 139, 250, 0.26));
  box-shadow: 0 0 80px rgba(125, 211, 252, 0.18);
}

.core-node span {
  color: var(--green);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.core-node strong {
  max-width: 170px;
  margin: 0;
  font-size: 1.45rem;
  line-height: 1.1;
  letter-spacing: -0.04em;
}

.agent-node,
.admin-node {
  min-width: 132px;
  border-radius: 999px;
  padding: 14px 18px;
}

.admin-node {
  top: 34px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(140, 244, 201, 0.12);
  color: var(--green);
}

.node-a {
  top: 150px;
  left: 110px;
}

.node-b {
  top: 150px;
  right: 110px;
}

.node-c {
  bottom: 88px;
  left: 164px;
}

.node-d {
  right: 164px;
  bottom: 88px;
}

.network-line {
  position: absolute;
  z-index: 1;
  top: 50%;
  left: 50%;
  width: 230px;
  height: 2px;
  transform-origin: left center;
  background: linear-gradient(90deg, rgba(125, 211, 252, 0.1), rgba(125, 211, 252, 0.75));
}

.line-admin {
  width: 188px;
  transform: rotate(-90deg);
}

.line-a {
  transform: rotate(205deg);
}

.line-b {
  transform: rotate(-25deg);
}

.line-c {
  transform: rotate(145deg);
}

.line-d {
  transform: rotate(35deg);
}

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

.final-cta {
  width: min(960px, calc(100% - 40px));
  text-align: center;
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  border-top: 1px solid var(--line);
  padding: 28px 0 42px;
  color: var(--muted);
}

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

.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal.is-open {
  display: flex;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(5, 7, 13, 0.74);
  backdrop-filter: blur(12px);
}

.modal-card {
  position: relative;
  z-index: 1;
  width: min(520px, 100%);
  border: 1px solid var(--line);
  border-radius: 30px;
  background:
    radial-gradient(circle at 100% 0%, rgba(125, 211, 252, 0.16), transparent 22rem),
    rgba(12, 16, 32, 0.96);
  box-shadow: var(--shadow);
  padding: 34px;
}

.modal-card h2 {
  margin-bottom: 24px;
  font-size: clamp(2rem, 5vw, 3.4rem);
}

.modal-close {
  position: absolute;
  top: 18px;
  right: 18px;
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  font-size: 1.6rem;
  line-height: 1;
}

.access-form {
  display: grid;
  gap: 16px;
}

.access-form label {
  display: grid;
  gap: 8px;
  color: #dfe5ff;
  font-weight: 700;
}

.access-form input,
.access-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  padding: 14px 16px;
  outline: none;
}

.access-form textarea {
  resize: vertical;
}

.access-form input:focus,
.access-form textarea:focus {
  border-color: rgba(125, 211, 252, 0.7);
  box-shadow: 0 0 0 4px rgba(125, 211, 252, 0.12);
}

.access-form button:disabled {
  cursor: wait;
  opacity: 0.72;
}

.form-status {
  min-height: 1.4em;
  margin: 0;
  font-weight: 700;
}

.form-status.is-success {
  color: var(--green);
}

.form-status.is-error {
  color: #fca5a5;
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .hero,
  .split,
  .a2a-card {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .agent-card {
    max-width: 560px;
  }

  .timeline,
  .steps {
    grid-template-columns: 1fr;
  }

  .network-card {
    min-height: 660px;
  }

  .core-node {
    width: 220px;
    height: 220px;
  }

  .admin-node {
    top: 28px;
  }

  .node-a {
    top: 150px;
    left: 28px;
  }

  .node-b {
    top: 150px;
    right: 28px;
  }

  .node-c {
    bottom: 70px;
    left: 46px;
  }

  .node-d {
    right: 46px;
    bottom: 70px;
  }
}

@media (max-width: 640px) {
  .section {
    width: min(100% - 28px, 1120px);
    padding: 68px 0;
  }

  .nav {
    width: min(100% - 28px, 1120px);
  }

  .nav-cta {
    display: none;
  }

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

  .a2a-card {
    grid-template-columns: 1fr;
  }

  .message.user {
    margin-left: 0;
  }

  .footer {
    width: min(100% - 28px, 1120px);
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .network-card {
    display: grid;
    min-height: auto;
    gap: 12px;
    padding: 20px;
  }

  .network-node,
  .core-node,
  .agent-node,
  .admin-node {
    position: static;
    width: auto;
    height: auto;
    min-width: 0;
    transform: none;
    border-radius: 20px;
    padding: 16px;
  }

  .core-node strong {
    max-width: none;
  }

  .network-line {
    display: none;
  }
}