:root {
  --ink: #0c2748;
  --text: #24364b;
  --muted: #69788a;
  --line: #e5eaf0;
  --soft: #f6f8fa;
  --blue: #0e5ad8;
  --blue-hover: #0a4dbb;
  --white: #ffffff;
  --shadow: 0 24px 70px rgba(23, 42, 69, .10);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--white);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; background: var(--white); }
a { color: inherit; text-decoration: none; }

.site-header {
  width: min(1180px, calc(100% - 48px));
  height: 84px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 720;
  letter-spacing: -.02em;
  color: var(--ink);
}

.brand-mark {
  width: 31px;
  height: 31px;
  display: inline-grid;
  place-items: center;
  border-radius: 10px;
  background: var(--ink);
  color: var(--white);
  font-size: 15px;
  font-weight: 750;
}

.brand-mark-small { width: 25px; height: 25px; border-radius: 8px; font-size: 12px; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 14px;
  background: var(--ink);
  color: var(--white);
  font-size: 15px;
  font-weight: 650;
  box-shadow: 0 8px 22px rgba(12, 39, 72, .12);
  transition: transform .18s ease, background .18s ease;
}

.button:hover { background: #143b67; transform: translateY(-1px); }
.button:focus-visible { outline: 3px solid rgba(14,90,216,.25); outline-offset: 3px; }
.button-small { min-height: 40px; padding: 0 18px; border-radius: 12px; font-size: 14px; }

.hero {
  width: min(1040px, calc(100% - 48px));
  margin: 0 auto;
  padding: 96px 0 72px;
}

.eyebrow {
  color: var(--blue);
  font-size: 13px;
  font-weight: 720;
  letter-spacing: .08em;
  text-transform: uppercase;
}

h1, h2, h3 { color: var(--ink); margin: 0; }
h1 {
  max-width: 900px;
  margin-top: 18px;
  font-size: clamp(52px, 7.5vw, 92px);
  line-height: .99;
  letter-spacing: -.065em;
  font-weight: 760;
}

.hero-copy {
  max-width: 680px;
  margin: 34px 0 0;
  font-size: clamp(19px, 2.2vw, 24px);
  line-height: 1.55;
  letter-spacing: -.018em;
  color: #4c5e73;
}

.hero-actions {
  margin-top: 34px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.access-note { color: var(--muted); font-size: 13px; }

.product-shell {
  width: min(1180px, calc(100% - 48px));
  min-height: 600px;
  margin: 20px auto 0;
  border: 1px solid var(--line);
  border-radius: 26px;
  display: grid;
  grid-template-columns: 245px 1fr;
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--white);
}

.mock-sidebar {
  border-right: 1px solid var(--line);
  background: #f8f9fb;
  padding: 23px 16px;
}

.mock-brand {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--ink);
  font-weight: 720;
  margin-bottom: 38px;
}

.mock-label {
  color: #8a96a5;
  font-size: 10px;
  font-weight: 720;
  letter-spacing: .09em;
  margin: 0 7px 12px;
}
.mock-label.second { margin-top: 28px; }

.mock-module, .mock-item, .mock-project, .mock-chat {
  border-radius: 9px;
  padding: 9px 9px;
  font-size: 13px;
  color: #445469;
}
.mock-module { color: var(--ink); font-weight: 680; display: flex; gap: 7px; }
.mock-item { padding-left: 27px; display: flex; gap: 8px; }
.mock-project { color: var(--ink); font-weight: 620; display: flex; gap: 7px; }
.mock-chat { padding-left: 28px; }
.mock-chat.selected { background: #e8edf3; color: var(--ink); }

.mock-main {
  position: relative;
  min-width: 0;
  display: flex;
  flex-direction: column;
  background: white;
}

.mock-top {
  height: 58px;
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  padding: 0 26px;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  font-size: 13px;
  font-weight: 650;
}

.mock-conversation {
  width: min(740px, calc(100% - 48px));
  margin: 0 auto;
  padding: 46px 0 112px;
  flex: 1;
}

.thread-chip {
  padding: 11px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--soft);
  font-size: 12px;
  font-weight: 630;
  color: #536175;
}

.user-bubble {
  width: max-content;
  max-width: 78%;
  margin: 32px 0 32px auto;
  padding: 12px 15px;
  border-radius: 18px 18px 5px 18px;
  background: #f0f3f6;
  color: #182a40;
  font-size: 14px;
}

.assistant-row { display: grid; grid-template-columns: 32px 1fr; gap: 12px; }
.assistant-icon {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  background: var(--ink);
  color: white;
  font-size: 12px;
  font-weight: 700;
}
.assistant-copy { font-size: 14px; line-height: 1.6; color: #314258; }
.assistant-copy strong { display: block; color: var(--ink); margin-bottom: 3px; }
.assistant-copy p { margin: 0 0 18px; }

.mock-composer {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  width: min(740px, calc(100% - 48px));
  min-height: 58px;
  padding: 10px 11px 10px 18px;
  border: 1px solid #dce2e8;
  border-radius: 18px;
  box-shadow: 0 8px 28px rgba(30, 48, 72, .08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #8a96a5;
  font-size: 13px;
  background: white;
}

.send {
  width: 36px;
  height: 36px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: white;
  font-size: 17px;
}

.section {
  width: min(1080px, calc(100% - 48px));
  margin: 0 auto;
  padding: 150px 0 130px;
}

.section-intro { max-width: 700px; }
.section h2, .privacy-band h2, .final-cta h2 {
  margin-top: 14px;
  font-size: clamp(38px, 5vw, 60px);
  line-height: 1.06;
  letter-spacing: -.045em;
  font-weight: 740;
}
.section-intro > p {
  margin: 24px 0 0;
  font-size: 18px;
  line-height: 1.65;
  color: #596a7d;
}

.feature-grid {
  margin-top: 70px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.feature {
  min-height: 230px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--white);
}
.feature-number { font-size: 12px; color: #9aa5b2; font-weight: 700; }
.feature h3 { margin-top: 34px; font-size: 24px; letter-spacing: -.025em; }
.feature p { max-width: 410px; margin: 12px 0 0; color: #68778a; line-height: 1.6; font-size: 15px; }

.privacy-band {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: 72px;
  border-radius: 28px;
  background: var(--ink);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
  align-items: end;
}
.privacy-band .eyebrow { color: #7fb1ff; }
.privacy-band h2 { color: white; }
.privacy-band p {
  margin: 0;
  color: #d2dce7;
  font-size: 18px;
  line-height: 1.65;
}

.final-cta {
  width: min(800px, calc(100% - 48px));
  margin: 0 auto;
  padding: 150px 0;
  text-align: center;
}
.final-cta p { color: #657589; font-size: 18px; margin: 18px 0 30px; }

footer {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  min-height: 90px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: #7c8998;
  font-size: 12px;
}

@media (max-width: 760px) {
  .site-header { width: min(100% - 30px, 1180px); height: 70px; }
  .hero { width: min(100% - 30px, 1040px); padding: 72px 0 54px; }
  h1 { font-size: clamp(46px, 14vw, 68px); }
  .hero-copy { font-size: 18px; margin-top: 26px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 12px; }

  .product-shell {
    width: calc(100% - 24px);
    min-height: 530px;
    grid-template-columns: 1fr;
    border-radius: 21px;
  }
  .mock-sidebar { display: none; }
  .mock-top { padding: 0 18px; }
  .mock-conversation { width: calc(100% - 28px); padding: 30px 0 104px; }
  .mock-composer { bottom: 16px; width: calc(100% - 28px); }
  .user-bubble { max-width: 88%; }

  .section { width: calc(100% - 30px); padding: 105px 0 90px; }
  .feature-grid { grid-template-columns: 1fr; margin-top: 48px; }
  .feature { min-height: 190px; }
  .privacy-band {
    width: calc(100% - 24px);
    padding: 38px 26px;
    grid-template-columns: 1fr;
    gap: 30px;
    border-radius: 22px;
  }
  .privacy-band p { font-size: 16px; }
  .final-cta { width: calc(100% - 30px); padding: 105px 0; }
  footer {
    width: calc(100% - 30px);
    min-height: 110px;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
}