:root {
  color-scheme: light;
  --ink: #121815;
  --muted: #5f6c67;
  --line: #d8e0db;
  --surface: #ffffff;
  --soft: #eef4f1;
  --deep: #123f35;
  --blue: #266d9d;
  --green: #257057;
  --amber: #a86315;
  --shadow: 0 24px 80px rgba(20, 34, 29, 0.12);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    linear-gradient(90deg, rgba(18, 63, 53, 0.045) 1px, transparent 1px),
    linear-gradient(0deg, rgba(38, 109, 157, 0.045) 1px, transparent 1px),
    linear-gradient(180deg, #fbfcfa 0%, #f1f5f2 54%, #e9f0ed 100%);
  background-size: 44px 44px, 44px 44px, auto;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px max(22px, calc((100vw - 1180px) / 2));
  border-bottom: 1px solid rgba(216, 224, 219, 0.74);
  background: rgba(251, 252, 250, 0.88);
  backdrop-filter: blur(18px);
}

.brand,
nav,
.hero-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand {
  font-weight: 850;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(38, 109, 157, 0.22), transparent 48%),
    linear-gradient(315deg, rgba(37, 112, 87, 0.24), transparent 52%),
    var(--surface);
  box-shadow: var(--shadow);
}

nav {
  color: var(--muted);
  font-size: 14px;
  font-weight: 750;
}

.header-cta,
.primary-cta,
.secondary-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border-radius: var(--radius);
  font-weight: 850;
  white-space: nowrap;
}

.header-cta,
.primary-cta {
  background: var(--deep);
  color: #ffffff;
}

.header-cta {
  padding: 0 16px;
}

.primary-cta {
  padding: 0 18px;
}

.secondary-cta {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.78);
  padding: 0 18px;
}

.hero,
.section,
.proof-strip {
  width: min(1180px, calc(100% - 44px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, 0.82fr);
  gap: 28px;
  align-items: center;
  min-height: calc(100vh - 82px);
  padding: 54px 0;
}

.hero-copy {
  display: grid;
  gap: 22px;
}

.eyebrow {
  margin: 0;
  color: var(--blue);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  max-width: 760px;
  font-size: clamp(44px, 6vw, 84px);
  line-height: 0.94;
  font-weight: 900;
}

h2 {
  max-width: 780px;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1;
  font-weight: 900;
}

.hero-copy > p:not(.eyebrow),
.section > div > p,
.diagnostic p {
  max-width: 680px;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.5;
}

.price-card,
.steps article,
.compare-grid article,
.proof-strip article {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow);
}

.hero-system {
  margin: 0;
  display: grid;
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.product-preview img,
.product-shot img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.product-preview figcaption {
  display: grid;
  gap: 7px;
}

.product-preview figcaption span,
.price-card span {
  color: var(--blue);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  padding: 10px 0 64px;
}

.proof-strip article,
.steps article,
.compare-grid article {
  display: grid;
  gap: 8px;
  padding: 18px;
}

.proof-strip strong,
.steps strong,
.compare-grid span {
  font-size: 18px;
  font-weight: 900;
}

.proof-strip span,
.steps span,
.compare-grid p,
.price-card li,
footer {
  color: var(--muted);
  line-height: 1.45;
}

.section {
  padding: 76px 0;
}

.split,
.diagnostic {
  display: grid;
  grid-template-columns: minmax(0, 0.74fr) minmax(420px, 1fr);
  gap: 28px;
}

.section > div:first-child {
  display: grid;
  align-content: start;
  gap: 16px;
}

.steps,
.compare-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.steps b {
  color: var(--blue);
}

.comparison {
  display: grid;
  gap: 18px;
}

.site-agent-section {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(380px, 0.74fr);
  gap: 28px;
  align-items: start;
}

.site-agent-copy {
  display: grid;
  gap: 18px;
}

.argument-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.argument-card {
  display: grid;
  gap: 9px;
  min-height: 132px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.86);
  box-shadow: var(--shadow);
  padding: 17px;
  color: inherit;
  cursor: pointer;
  text-align: left;
  transition:
    border-color 160ms ease,
    transform 160ms ease,
    background 160ms ease;
}

.argument-card:hover,
.argument-card.is-active {
  border-color: rgba(38, 109, 157, 0.58);
  background: linear-gradient(135deg, rgba(38, 109, 157, 0.13), rgba(255, 255, 255, 0.94));
  transform: translateY(-1px);
}

.argument-card span,
.idea-agent-top span,
.idea-message span {
  color: var(--blue);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.argument-card strong {
  font-size: 17px;
  line-height: 1.25;
}

.idea-agent {
  position: sticky;
  top: 96px;
  display: grid;
  gap: 15px;
  border: 1px solid rgba(18, 63, 53, 0.22);
  border-radius: var(--radius);
  background:
    linear-gradient(140deg, rgba(18, 63, 53, 0.08), transparent 42%),
    rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow);
  padding: 18px;
}

.idea-agent-top {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 16px;
}

.idea-agent-top div {
  display: grid;
  gap: 5px;
}

.idea-agent-top b {
  border: 1px solid rgba(37, 112, 87, 0.28);
  border-radius: var(--radius);
  color: var(--green);
  padding: 6px 8px;
  font-size: 12px;
}

.idea-agent-thread {
  display: grid;
  gap: 10px;
}

.idea-message {
  display: grid;
  gap: 7px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 13px;
}

.idea-message.human {
  justify-self: end;
  max-width: 88%;
  background: var(--deep);
  color: #ffffff;
}

.idea-message.human span {
  color: #d8fff2;
}

.idea-message.agent {
  background: #f7faf8;
}

.idea-message p {
  line-height: 1.48;
}

.prompt-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.prompt-chip {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  font-weight: 800;
  padding: 8px 10px;
}

.idea-agent-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
}

.idea-agent-form input {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  color: var(--ink);
  font: inherit;
  padding: 0 12px;
}

.idea-agent-form button {
  border: 0;
  border-radius: var(--radius);
  background: var(--deep);
  color: #ffffff;
  cursor: pointer;
  font: inherit;
  font-weight: 850;
  min-height: 42px;
  padding: 0 14px;
}

.product-section {
  display: grid;
  gap: 24px;
}

.product-shot {
  margin: 0;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: var(--shadow);
}

.winner {
  border-color: rgba(37, 112, 87, 0.55) !important;
  background: linear-gradient(135deg, rgba(37, 112, 87, 0.12), rgba(255, 255, 255, 0.96)) !important;
}

.diagnostic {
  align-items: start;
}

.price-card {
  display: grid;
  gap: 16px;
  padding: 22px;
}

.price-card strong {
  font-size: 64px;
  line-height: 0.95;
}

.price-card ul {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-left: 20px;
}

.price-card small {
  color: var(--muted);
}

footer {
  display: flex;
  justify-content: center;
  gap: 18px;
  padding: 42px 22px;
  border-top: 1px solid var(--line);
}

@media (max-width: 920px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  nav {
    flex-wrap: wrap;
  }

  .hero,
  .split,
  .diagnostic,
  .proof-strip,
  .site-agent-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-system {
    order: -1;
  }

  .idea-agent {
    position: static;
  }
}

@media (max-width: 640px) {
  .hero,
  .section,
  .proof-strip {
    width: min(100% - 28px, 1180px);
  }

  h1 {
    font-size: 42px;
  }

  .hero-actions,
  .argument-grid,
  .steps,
  .compare-grid {
    grid-template-columns: 1fr;
    display: grid;
  }

  .header-cta {
    width: 100%;
  }
}