:root {
  color-scheme: light;
  --ink: #172131;
  --muted: #526173;
  --subtle: #718093;
  --line: #c8d3df;
  --line-strong: #8ea0b3;
  --panel: #ffffff;
  --surface: #eef3f7;
  --surface-strong: #dfe8f0;
  --green: #24745f;
  --green-dark: #155643;
  --amber: #b67a18;
  --blue: #236aa3;
  --shadow: 0 18px 55px rgba(36, 55, 74, 0.16);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Hiragino Sans", "Yu Gothic", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--surface);
  line-height: 1.65;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 0 5vw;
  border-bottom: 1px solid rgba(142, 160, 179, 0.34);
  background: rgba(238, 243, 247, 0.9);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  color: var(--ink);
  font-size: 16px;
  font-weight: 800;
  text-decoration: none;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  width: 52px;
  flex: 0 0 auto;
}

.brand-mark span {
  display: block;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--blue);
}

.brand-mark span:first-child {
  width: 20px;
  height: 20px;
  border: 5px solid var(--green);
  background: transparent;
}

.brand-mark span:last-child {
  background: var(--amber);
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-nav a {
  padding: 8px 12px;
  border-radius: 6px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.header-nav a:hover {
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
}

.hero {
  position: relative;
  min-height: calc(100vh - 72px);
  overflow: hidden;
  display: grid;
  align-items: center;
  padding: 86px 5vw 120px;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(250, 252, 254, 0.92) 0%, rgba(250, 252, 254, 0.84) 38%, rgba(250, 252, 254, 0.5) 58%, rgba(238, 243, 247, 0.72) 100%),
    linear-gradient(90deg, rgba(202, 213, 224, 0.16) 1px, transparent 1px),
    linear-gradient(0deg, rgba(202, 213, 224, 0.16) 1px, transparent 1px),
    #f8fbfd;
  background-size: auto, 72px 72px, 72px 72px, auto;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(90deg, #f8fbfd 0%, rgba(248, 251, 253, 0.9) 38%, rgba(248, 251, 253, 0.36) 60%, rgba(248, 251, 253, 0.12) 100%);
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 2;
  height: 120px;
  background: linear-gradient(180deg, rgba(238, 243, 247, 0), var(--surface));
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
  padding-top: 28px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--green-dark);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 22px;
  max-width: 760px;
  font-size: clamp(48px, 7vw, 92px);
  line-height: 0.96;
  letter-spacing: 0;
}

.hero-lead {
  max-width: 720px;
  margin-bottom: 34px;
  color: #26374a;
  font-size: 22px;
  font-weight: 650;
  line-height: 1.55;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 18px;
  border: 1px solid var(--green-dark);
  border-radius: 8px;
  font-weight: 900;
  text-decoration: none;
}

.button.primary {
  background: var(--green);
  color: #ffffff;
}

.button.primary:hover {
  background: var(--green-dark);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.78);
  color: var(--green-dark);
}

.button.secondary:hover {
  background: #ffffff;
}

.hero-product-shot {
  position: absolute;
  top: 0;
  right: calc(-4vw + 80px);
  bottom: 0;
  z-index: 0;
  width: min(84vw, 1440px);
  height: 100%;
  background-image:
    linear-gradient(90deg, rgba(248, 251, 253, 0.88) 0%, rgba(248, 251, 253, 0.42) 30%, rgba(248, 251, 253, 0.08) 100%),
    linear-gradient(180deg, rgba(248, 251, 253, 0.46) 0%, rgba(248, 251, 253, 0.02) 36%, rgba(248, 251, 253, 0.34) 100%),
    url("./assets/hero-product-graph.png");
  background-position: 38% center;
  background-size: cover;
  filter: saturate(0.94) contrast(0.98);
  opacity: 0.72;
  pointer-events: none;
}

.notice {
  display: flex;
  justify-content: center;
  padding: 22px 5vw;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

.notice div {
  width: min(1120px, 100%);
  color: var(--muted);
  font-size: 15px;
}

.notice strong {
  color: var(--ink);
}

.section {
  padding: 88px 5vw;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.section:nth-of-type(even) {
  background: #f7fafc;
}

.section-heading {
  width: min(1120px, 100%);
  margin: 0 auto 34px;
}

.section-heading h2 {
  max-width: 820px;
  margin-bottom: 0;
  font-size: clamp(30px, 4vw, 54px);
  line-height: 1.12;
  letter-spacing: 0;
}

.problem-grid,
.demo-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
  gap: 36px;
  width: min(1120px, 100%);
  margin: 0 auto;
}

.problem-grid p,
.demo-copy p {
  color: var(--muted);
  font-size: 18px;
}

.problem-grid ul,
.demo-copy ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.problem-grid li,
.demo-copy li {
  position: relative;
  padding: 14px 0 14px 30px;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  font-weight: 750;
}

.problem-grid li::before,
.demo-copy li::before {
  content: "";
  position: absolute;
  top: 22px;
  left: 0;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--green);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  width: min(1120px, 100%);
  margin: 0 auto;
}

.feature-card {
  min-height: 260px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 10px 30px rgba(52, 72, 93, 0.08);
}

.feature-number {
  display: block;
  margin-bottom: 34px;
  color: var(--amber);
  font-size: 13px;
  font-weight: 900;
}

.feature-card h3,
.architecture-list h3,
.stack-group h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.25;
}

.feature-card p,
.architecture-list p {
  margin-bottom: 0;
  color: var(--muted);
}

.demo-section {
  background: #f7fafc;
}

.demo-link {
  align-self: start;
  display: inline-grid;
  gap: 4px;
  min-height: 88px;
  max-width: 360px;
  padding: 18px 22px;
  border: 1px solid var(--green-dark);
  border-radius: 8px;
  background: var(--green);
  color: #ffffff;
  text-decoration: none;
  box-shadow: var(--shadow);
}

.demo-link:hover {
  background: var(--green-dark);
}

.demo-link span {
  font-size: 13px;
  font-weight: 900;
  opacity: 0.86;
}

.demo-link strong {
  overflow-wrap: anywhere;
  font-size: 24px;
  line-height: 1.18;
}

.architecture-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  width: min(1120px, 100%);
  margin: 0 auto;
  border: 1px solid var(--line);
  background: var(--line);
}

.architecture-list > div {
  min-height: 180px;
  padding: 26px;
  background: var(--panel);
}

.stack-groups {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  width: min(1120px, 100%);
  margin: 0 auto;
}

.stack-group {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 10px 30px rgba(52, 72, 93, 0.08);
}

.stack-list {
  display: grid;
  gap: 12px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.stack-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 46px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fbfd;
  color: var(--ink);
  font-weight: 800;
}

.tech-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  border-radius: 8px;
  border: 1px solid rgba(202, 213, 224, 0.75);
  background: #ffffff;
  font-size: 12px;
  font-weight: 950;
  line-height: 1;
}

.tech-logo img {
  display: block;
  max-width: 28px;
  max-height: 28px;
  object-fit: contain;
}

.tech-logo-wide img {
  max-width: 32px;
}

.tech-logo-text {
  border-color: transparent;
  background: #336791;
  color: #ffffff;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 30px 5vw;
  background: var(--ink);
  color: #ffffff;
}

.site-footer p {
  margin: 0;
  color: #dce5ee;
}

.site-footer a {
  color: #ffffff;
  font-weight: 800;
}

@media (max-width: 980px) {
  .feature-grid,
  .architecture-list,
  .stack-groups,
  .problem-grid,
  .demo-layout {
    grid-template-columns: 1fr;
  }

  .hero-product-shot {
    width: 100%;
    opacity: 0.32;
  }

  .hero-lead {
    font-size: 19px;
  }
}

@media (max-width: 720px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
    padding-top: 18px;
    padding-bottom: 16px;
  }

  .header-nav {
    width: 100%;
    justify-content: space-between;
  }

  .header-nav a {
    padding-right: 8px;
    padding-left: 8px;
  }

  .hero {
    min-height: 720px;
    padding-top: 54px;
  }

  h1 {
    font-size: 48px;
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  .section {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .section-heading h2 {
    font-size: 32px;
  }

  .demo-link strong {
    font-size: 22px;
  }

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