:root {
  --bg: #f5f1e8;
  --bg-strong: #10322c;
  --paper: rgba(255, 250, 240, 0.74);
  --paper-strong: rgba(255, 251, 244, 0.92);
  --ink: #102220;
  --muted: #59635f;
  --line: rgba(16, 50, 44, 0.12);
  --teal: #0e7c70;
  --teal-deep: #0b5f56;
  --teal-soft: #d8efe9;
  --gold: #cb8a2f;
  --gold-soft: #f5e0bb;
  --shadow: 0 20px 50px rgba(16, 34, 32, 0.12);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-sm: 12px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(203, 138, 47, 0.18), transparent 28%),
    radial-gradient(circle at top right, rgba(14, 124, 112, 0.18), transparent 35%),
    radial-gradient(circle at 50% 20%, rgba(255, 255, 255, 0.55), transparent 26%),
    linear-gradient(180deg, #f9f6ef 0%, #f3ede2 60%, #efe7d9 100%);
  color: var(--ink);
  font-family: "Space Grotesk", sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
}

img,
svg {
  max-width: 100%;
}

.backdrop {
  position: fixed;
  inset: auto;
  pointer-events: none;
  z-index: 0;
  border-radius: 999px;
  filter: blur(70px);
  opacity: 0.6;
}

.backdrop-one {
  width: 28rem;
  height: 28rem;
  top: -9rem;
  right: -7rem;
  background: rgba(14, 124, 112, 0.16);
}

.backdrop-two {
  width: 24rem;
  height: 24rem;
  bottom: 10rem;
  left: -7rem;
  background: rgba(203, 138, 47, 0.14);
}

.site-header,
main,
.site-footer {
  position: relative;
  z-index: 1;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 2rem;
  position: sticky;
  top: 0;
  backdrop-filter: blur(18px);
  background: rgba(245, 241, 232, 0.78);
  border-bottom: 1px solid rgba(16, 50, 44, 0.06);
}

.site-header > *,
.hero-copy,
.hero-panel,
.mode-layout > * {
  min-width: 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  text-decoration: none;
  color: inherit;
}

.brand-mark {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--bg-strong), var(--teal));
  color: #fff;
  font-weight: 700;
}

.brand-copy {
  display: flex;
  flex-direction: column;
}

.brand-copy strong {
  font-size: 1rem;
}

.brand-copy small,
.site-nav a,
.signal-strip,
.mono,
.eyebrow {
  font-family: "IBM Plex Mono", monospace;
}

.brand-copy small,
.site-nav a {
  color: var(--muted);
}

.site-nav,
.header-actions,
.hero-actions,
.cta-group,
.footer-links,
.mode-picker {
  display: flex;
  gap: 0.8rem;
  align-items: center;
  flex-wrap: wrap;
}

.site-nav a,
.footer-links a {
  text-decoration: none;
  color: var(--muted);
}

.site-nav a {
  position: relative;
  white-space: nowrap;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.35rem;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: left;
  background: linear-gradient(90deg, var(--teal), var(--gold));
  transition: transform 180ms ease;
}

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

.site-nav a:hover::after {
  transform: scaleX(1);
}

.site-nav a.active {
  color: var(--ink);
}

.site-nav a.active::after {
  transform: scaleX(1);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.9rem 1.25rem;
  text-decoration: none;
  font-weight: 700;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
  text-align: center;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: linear-gradient(135deg, var(--bg-strong), var(--teal));
  color: #fff;
  box-shadow: 0 16px 35px rgba(14, 124, 112, 0.22);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.65);
  color: var(--ink);
  border: 1px solid rgba(16, 50, 44, 0.1);
}

main {
  padding: 0 2rem 4rem;
}

.hero,
.section,
.rails,
.site-footer {
  max-width: 1240px;
  margin: 0 auto;
}

.hero {
  padding: 4.5rem 0 3rem;
  display: grid;
  gap: 2rem;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  min-height: min(54rem, calc(100vh - 6rem));
}

.eyebrow {
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal-deep);
}

.hero h1,
.section-heading h2 {
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin: 0.3rem 0 1rem;
}

.hero h1 {
  font-size: clamp(3rem, 8vw, 6.4rem);
  max-width: 13ch;
  text-wrap: balance;
}

.hero-text,
.feature-card p,
.mode-layout p,
.rail-card p,
.faq-grid p,
.site-footer p {
  color: var(--muted);
  line-height: 1.7;
}

.signal-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  padding: 0;
  margin: 1.5rem 0 0;
  list-style: none;
  color: var(--teal-deep);
}

.signal-strip li {
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(14, 124, 112, 0.12);
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.signal-strip li:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.82);
  border-color: rgba(14, 124, 112, 0.24);
}

.hero-panel .panel-shell,
.feature-card,
.detail-card,
.rail-card,
.faq-grid details,
.surface-card {
  border: 1px solid var(--line);
  background: var(--paper);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
  will-change: transform;
}

.panel-shell {
  padding: 1.1rem;
  border-radius: var(--radius-xl);
}

.panel-topline,
.terminal-heading,
.metric-ribbon article span,
.detail-tag {
  color: var(--muted);
  font-size: 0.82rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.panel-topline .mono,
.terminal-heading .mono,
.detail-tag {
  overflow-wrap: anywhere;
}

.status-dot {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 999px;
  display: inline-block;
  background: #10b981;
  box-shadow: 0 0 0 6px rgba(16, 185, 129, 0.12);
}

.terminal-window {
  margin-top: 1rem;
  background: #0f1f1d;
  color: #d8f5ef;
  border-radius: 22px;
  overflow: hidden;
}

.terminal-heading {
  padding: 0.9rem 1rem;
  background: rgba(255, 255, 255, 0.06);
}

.terminal-output {
  min-height: 18rem;
  margin: 0;
  padding: 1.25rem;
  white-space: pre-wrap;
  line-height: 1.55;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.92rem;
}

.metric-ribbon {
  margin-top: 1rem;
  display: grid;
  gap: 0.8rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.metric-ribbon article {
  padding: 1rem;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.7);
}

.metric-ribbon strong {
  display: block;
  font-size: 2rem;
  margin-bottom: 0.35rem;
}

.section {
  padding: 4rem 0;
}

.section-heading {
  max-width: 52rem;
  margin-bottom: 1.8rem;
}

.section-heading.compact {
  max-width: 46rem;
}

.section-heading h2 {
  font-size: clamp(2.2rem, 5vw, 4rem);
}

.card-grid {
  display: grid;
  gap: 1.2rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.surface-grid {
  display: grid;
  gap: 1.2rem;
  grid-template-columns: 1.15fr 1fr 1fr;
}

.surface-card {
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.surface-card-primary {
  background:
    linear-gradient(145deg, rgba(16, 50, 44, 0.94), rgba(14, 124, 112, 0.88)),
    var(--paper-strong);
  color: #fff;
}

.surface-card-primary p,
.surface-card-primary .surface-label,
.surface-card-primary .inline-link {
  color: rgba(255, 255, 255, 0.78);
}

.surface-label {
  display: inline-flex;
  margin-bottom: 1rem;
  color: var(--teal-deep);
}

.surface-card h3 {
  font-size: clamp(1.5rem, 2.6vw, 2.3rem);
  margin: 0 0 0.8rem;
}

.inline-link {
  display: inline-flex;
  margin-top: 1rem;
  color: var(--teal-deep);
  text-decoration: none;
  font-weight: 700;
}

.inline-link:hover {
  color: var(--bg-strong);
}

.feature-card,
.detail-card,
.rail-card,
.faq-grid details,
.surface-card {
  border-radius: var(--radius-xl);
}

.feature-card {
  padding: 1.4rem;
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.feature-index {
  display: inline-flex;
  margin-bottom: 1rem;
  color: var(--gold);
  font-family: "IBM Plex Mono", monospace;
}

.feature-card h3,
.mode-layout h3,
.rail-card h3 {
  font-size: 1.5rem;
  margin: 0 0 0.7rem;
}

.mode-button {
  border: 0;
  background: rgba(255, 255, 255, 0.62);
  color: var(--muted);
  padding: 0.8rem 1rem;
  border-radius: 999px;
  cursor: pointer;
  font-family: "IBM Plex Mono", monospace;
  transition: transform 180ms ease, background 180ms ease, color 180ms ease;
}

.mode-button.active {
  background: var(--bg-strong);
  color: #fff;
}

.mode-button:hover {
  transform: translateY(-1px);
}

.mode-panel {
  display: none;
  margin-top: 1.2rem;
}

.mode-panel.active {
  display: block;
}

.mode-layout {
  display: grid;
  gap: 1.2rem;
  grid-template-columns: 1fr 0.9fr;
}

.detail-card {
  padding: 1.4rem;
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.stack-list {
  display: grid;
  gap: 1rem;
  margin-top: 1rem;
}

.stack-list div {
  display: grid;
  gap: 0.25rem;
}

.stack-list span,
.bullet-list {
  color: var(--muted);
}

.bullet-list {
  padding-left: 1.15rem;
  line-height: 1.7;
}

.architecture-card {
  display: grid;
  gap: 0.85rem;
  align-content: start;
}

.flow-node {
  padding: 1rem;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.66);
  border: 1px solid rgba(16, 50, 44, 0.1);
}

.flow-arrow {
  width: 2px;
  height: 1.1rem;
  background: linear-gradient(180deg, var(--gold), transparent);
  margin-left: 1rem;
}

.rails {
  display: grid;
  gap: 1.2rem;
  grid-template-columns: 1.2fr 0.8fr;
  padding-bottom: 2rem;
}

.rail-card {
  padding: 1.6rem;
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.rail-card.warm {
  background: linear-gradient(135deg, rgba(255, 247, 232, 0.95), rgba(250, 233, 203, 0.82));
}

.rail-card.dark {
  background: linear-gradient(135deg, rgba(16, 50, 44, 0.95), rgba(14, 124, 112, 0.9));
  color: #fff;
}

.rail-card.dark p,
.rail-card.dark .eyebrow {
  color: rgba(255, 255, 255, 0.78);
}

.faq-grid {
  display: grid;
  gap: 1rem;
}

.faq-grid details {
  padding: 1.2rem 1.3rem;
}

.panel-shell:hover,
.feature-card:hover,
.detail-card:hover,
.rail-card:hover,
.faq-grid details:hover,
.surface-card:hover {
  transform: translateY(-4px);
  border-color: rgba(14, 124, 112, 0.22);
  box-shadow: 0 24px 50px rgba(16, 34, 32, 0.16);
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 620ms ease,
    transform 620ms cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.faq-grid summary {
  cursor: pointer;
  font-weight: 700;
}

.faq-grid p {
  margin-bottom: 0;
}

.site-footer {
  padding: 2rem 2rem 3rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.site-header.scrolled {
  background: rgba(245, 241, 232, 0.92);
  box-shadow: 0 18px 40px rgba(16, 34, 32, 0.08);
}

@media (max-width: 1024px) {
  .hero,
  .mode-layout,
  .rails,
  .surface-grid {
    grid-template-columns: 1fr;
  }

  .metric-ribbon,
  .card-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .site-header,
  main,
  .site-footer {
    padding-left: 1rem;
    padding-right: 1rem;
  }

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

  .header-actions,
  .hero-actions,
  .cta-group {
    width: 100%;
  }

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

  .site-nav {
    display: flex;
    width: 100%;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 0.25rem;
  }

  .site-nav::-webkit-scrollbar {
    display: none;
  }

  .hero {
    padding-top: 2.5rem;
    min-height: auto;
  }

  .hero h1 {
    max-width: none;
  }

  .mode-picker {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 0.25rem;
  }

  .site-footer {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}