.landing-page {
  color-scheme: dark;
  background: radial-gradient(circle at 50% 36rem, var(--color-paper-2), var(--color-paper) 38rem);
}

.landing-page .site-nav {
  background: var(--color-paper);
  border-block-end-color: var(--color-transparent);
}

.landing-page .site-nav__inner {
  min-block-size: 4.25rem;
}

.landing-page .wordmark {
  font-size: var(--text-md);
}

.landing-page .wordmark__mark {
  color: var(--color-gate-copper);
}

.landing-page .site-nav__links {
  gap: var(--space-lg);
}

.landing-page .site-nav__links > a {
  display: inline-flex;
  align-items: center;
  min-block-size: var(--control-height);
  text-decoration: none;
}

@media (max-width: 39.999rem) {
  .landing-page .site-nav__links {
    gap: var(--space-md);
    font-size: var(--text-sm);
  }
}

.landing-page .command-trigger {
  background: var(--color-paper-2);
  color: var(--color-ink-2);
}

.landing-page .button--primary {
  box-shadow: 0 2px 10px var(--color-shadow);
}

.landing-page .button--secondary {
  border-color: var(--color-rule-2);
}

.landing-page .signal-hero {
  display: grid;
  justify-items: center;
  gap: 0;
  padding-block: var(--space-md) var(--space-2xl);
  text-align: center;
}

.landing-page .signal-hero__copy {
  display: grid;
  justify-items: center;
  gap: var(--space-xs);
  min-inline-size: 0;
}

.landing-page .signal-hero h1 {
  max-inline-size: 28ch;
  font-size: clamp(2.1rem, 4vw, 3.1rem);
  line-height: 1.15;
  text-wrap: balance;
}

.landing-page .signal-hero__lede {
  max-inline-size: 55ch;
  color: var(--color-ink-2);
  font-size: clamp(var(--text-base), 1.8vw, var(--text-md));
  line-height: 1.4;
  text-wrap: balance;
}

.landing-page .signal-hero__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
  margin-block-start: var(--space-sm);
}

.landing-page .signal-hero__actions .button {
  min-inline-size: 11.75rem;
}

.landing-page .signal-hero__gate {
  inline-size: min(34rem, 100%, max(17rem, calc(100dvh - 26rem)));
  min-inline-size: 0;
  margin-block-start: var(--space-xs);
}

.signal-gate {
  position: relative;
  inline-size: 100%;
}

.agent-prompt {
  display: grid;
  gap: var(--space-md);
  min-inline-size: 0;
}

.signal-hero .agent-prompt {
  max-inline-size: 42rem;
  margin-block-start: var(--space-md);
}

.agent-prompt__text {
  padding: var(--space-md) var(--space-lg);
  background: var(--color-paper-2);
  border: var(--rule-hair) solid var(--color-rule-2);
  border-inline-start: 2px solid var(--color-gate-copper);
  border-radius: var(--radius-control);
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.65;
  text-align: start;
  overflow-wrap: anywhere;
  user-select: text;
}

.agent-prompt__actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-md);
}

.signal-hero .agent-prompt__actions {
  justify-content: center;
}

.agent-prompt--compact .agent-prompt__actions {
  order: -1;
}

.agent-prompt--compact summary {
  color: var(--color-ink-2);
  cursor: pointer;
  font-size: var(--text-sm);
}

.agent-prompt--compact details[open] .agent-prompt__text {
  margin-block-start: var(--space-sm);
}

.agent-prompt__hint {
  color: var(--color-ink-2);
  font-size: var(--text-xs);
}

.agent-start {
  padding-block: var(--space-3xl) var(--space-xl);
}

.agent-start > h2,
.agent-start__lede {
  text-align: center;
  text-wrap: balance;
}

.agent-start__lede {
  margin-block: var(--space-sm) var(--space-xl);
  color: var(--color-ink-2);
}

.agent-start__path {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  min-inline-size: 0;
  padding: var(--space-lg);
  border-block-start: 2px solid var(--color-gate-copper);
  background: var(--color-paper-raised);
}

.agent-start__path:nth-child(2) {
  border-block-start-color: var(--color-gate-blue-light);
}

.agent-start__path > p {
  color: var(--color-ink-2);
}

.agent-start__path .agent-prompt {
  margin-block-start: auto;
}

.agent-start__outcome {
  font-size: var(--text-sm);
}

.agent-guide {
  max-inline-size: 52rem;
  padding-block: var(--space-xl) var(--space-3xl);
}

.agent-guide__links {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-block-end: var(--space-xl);
}

.agent-guide .prose a,
.agent-guide .prose :not(pre) > code {
  white-space: normal;
  overflow-wrap: anywhere;
}

.signal-gate__stage {
  position: relative;
  inline-size: 100%;
  aspect-ratio: 1;
}

.signal-gate__structure {
  position: absolute;
  z-index: var(--z-raised);
  inset: 0;
  inline-size: 100%;
  block-size: 100%;
  overflow: visible;
  pointer-events: none;
}

.signal-gate__canvas {
  position: absolute;
  z-index: var(--z-base);
  inset: 22%;
  inline-size: 56%;
  block-size: 56%;
  border-radius: var(--radius-round);
  pointer-events: none;
}

.signal-gate__toggle {
  display: grid;
  place-items: center;
  position: absolute;
  z-index: var(--z-raised);
  inset-block-end: var(--space-xs);
  inset-inline-end: var(--space-xs);
  min-block-size: var(--control-height);
  inline-size: var(--control-height);
  padding: 0;
  background: var(--color-transparent);
  color: var(--color-muted);
  border: var(--rule-hair) solid var(--color-transparent);
  border-radius: var(--radius-round);
  font-size: var(--text-xs);
  white-space: nowrap;
}

.signal-gate__toggle:hover {
  background: var(--color-paper-3);
}

.signal-gate__toggle svg {
  inline-size: 1rem;
  block-size: 1rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.signal-gate__toggle .signal-gate__play-icon,
.signal-gate__toggle[aria-pressed="true"] .signal-gate__pause-icon {
  display: none;
}

.signal-gate__toggle[aria-pressed="true"] .signal-gate__play-icon {
  display: block;
}

.signal-gate__toggle:active {
  transform: translateY(1px);
}

.signal-gate__toggle[data-state="success"] {
  background: var(--color-success-surface);
  border-color: var(--color-gate-blue);
}

.signal-gate__toggle[data-state="error"] {
  color: var(--color-error);
  border-color: var(--color-error);
}

.signal-gate__toggle:disabled,
.signal-gate__toggle[aria-busy="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.gate-water-dark { stop-color: var(--color-gate-metal-dark); }
.gate-water-blue { stop-color: var(--color-gate-blue); }
.gate-water-light { stop-color: var(--color-gate-blue-light); }

.gate-water-lines {
  stroke: var(--color-gate-blue-light);
  stroke-width: 2;
  opacity: 0.72;
}

.gate-water-lines path:first-child {
  stroke-width: 3;
}

.gate-water-lines circle {
  stroke-width: 1;
  opacity: 0.5;
}

.gate-glyph {
  color: var(--color-gate-copper);
  fill: var(--color-gate-copper);
  font-family: var(--font-glyph);
  font-size: 44px;
  filter: drop-shadow(0 0 5px var(--color-gate-copper));
}

.gate-inner-track {
  fill: none;
  stroke: var(--color-gate-edge);
  stroke-width: 2;
  opacity: 0.45;
}

.gate-index {
  fill: none;
  stroke: var(--color-gate-copper);
  stroke-width: 2;
  opacity: 0.75;
}

.landing-page .signal-flow {
  border-block: var(--rule-hair) solid var(--color-rule);
}

.landing-page .signal-flow__inner {
  display: grid;
  justify-items: center;
  gap: var(--space-lg);
  padding-block: var(--space-2xl);
}

.landing-page .signal-flow h2 {
  text-align: center;
  text-wrap: balance;
}

.landing-page .signal-flow__steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-xl);
  inline-size: min(100%, 36rem);
  padding: 0;
  margin: 0;
  list-style: none;
}

.landing-page .signal-flow__steps li {
  position: relative;
  display: grid;
  align-content: start;
  gap: var(--space-sm);
  min-inline-size: 0;
  padding: var(--space-lg);
  background: var(--color-paper-raised);
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-surface);
  color: var(--color-ink);
}

.landing-page .signal-flow__step-title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.landing-page .signal-flow__step-title h3 {
  font-family: var(--font-display);
}

.landing-page .signal-flow__steps svg {
  flex: 0 0 1.5rem;
  inline-size: 1.5rem;
  block-size: 1.5rem;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
  color: var(--color-gate-blue-light);
}

.landing-page .signal-flow__steps li > p {
  color: var(--color-ink-2);
}

.landing-page .signal-flow__steps li:not(:last-child)::after {
  content: "↓";
  position: absolute;
  inset-block-end: calc(var(--space-xl) * -0.75);
  inset-inline-start: 50%;
  transform: translateX(-50%);
  color: var(--color-gate-copper);
  font-size: var(--text-lg);
}

.landing-page .communication-tools {
  padding-block: var(--space-3xl);
}

.landing-page .communication-tools > h2 {
  margin-block-end: var(--space-xl);
  text-align: center;
  text-wrap: balance;
}

.communication-tools__columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-xl);
}

.communication-tool {
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: var(--space-lg);
  min-inline-size: 0;
  padding: var(--space-lg);
  background: var(--color-paper-raised);
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-surface);
}

.communication-tool__intro,
.communication-tool__details {
  display: grid;
  gap: var(--space-sm);
  align-content: start;
}

.communication-tool p {
  color: var(--color-ink-2);
}

.communication-tool__details {
  font-size: var(--text-sm);
}

.communication-tool pre {
  min-inline-size: 0;
  padding: var(--space-lg);
  overflow-x: auto;
  background: var(--color-graphite);
  color: var(--color-code);
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-control);
  font-size: var(--text-xs);
  line-height: 1.7;
}

.communication-tool .code-method,
.communication-tool .code-key {
  color: var(--color-gate-blue-light);
}

@media (min-width: 48rem) {
  .communication-tools__columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.landing-page .statement-footer {
  border-block-start: var(--rule-hair) solid var(--color-rule);
}

@media (min-width: 40rem) {
  .landing-page .signal-hero {
    padding-block-start: var(--space-lg);
  }
}

@media (min-width: 60rem) {
  .landing-page .site-nav__inner {
    min-block-size: 4.5rem;
  }

  .landing-page .command-trigger {
    display: none;
  }

  .landing-page .signal-hero {
    padding-block-start: var(--space-sm);
  }

  .landing-page .signal-flow__steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    inline-size: min(100%, 68rem);
  }

  .landing-page .signal-flow__steps li:not(:last-child)::after {
    content: "→";
    inset-block-start: 50%;
    inset-block-end: auto;
    inset-inline-start: auto;
    inset-inline-end: calc(var(--space-xl) * -0.75);
    transform: translateY(-50%);
  }
}

@media (max-width: 39.999rem) {
  .landing-page .signal-hero__gate {
    inline-size: min(100%, 27rem);
  }
}

@media (hover: hover) and (pointer: fine) {
  .landing-page .site-nav__links > a:hover {
    color: var(--color-gate-blue-light);
  }
}