:root {
  --bg: #f6f9fc;
  --surface: #ffffff;
  --surface-2: #f9fbfe;
  --ink: #0f172a;
  --ink-soft: #42526b;
  --muted: #667892;
  --line: #d9e5f1;
  --line-strong: #bfd4e8;
  --brand: #0f172a;
  --accent: #18c4b0;
  --accent-2: #4f7cff;
  --accent-soft: rgba(24, 196, 176, 0.14);
  --warn: #fff5d6;
  --shadow: 0 18px 48px rgba(15, 23, 42, 0.08);
  --shadow-soft: 0 10px 26px rgba(15, 23, 42, 0.06);
  --radius: 28px;
  --radius-sm: 18px;
  --content: 1240px;
  --header-h: 78px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(24, 196, 176, 0.08), transparent 28%),
    linear-gradient(180deg, #f9fbfe 0%, #f5f9fd 42%, #ffffff 100%);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, textarea { font: inherit; }
:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 3px; }

.container {
  width: min(var(--content), calc(100% - 32px));
  margin: 0 auto;
}
.section {
  padding: 92px 0;
}
.card {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(191, 212, 232, 0.72);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(24, 196, 176, 0.18);
  color: #13887a;
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}
.section-intro {
  max-width: 860px;
  margin-bottom: 34px;
}
.section-intro.center,
.section-intro.center.narrow {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}
.section-intro.narrow,
.section-intro.center.narrow { max-width: 760px; }
.section-intro h2,
.analogy-copy h2,
.hero-copy h1,
.pilot-card h2 {
  margin: 16px 0 14px;
  line-height: 1.02;
  letter-spacing: -0.05em;
  text-wrap: balance;
}
.section-intro h2,
.analogy-copy h2,
.pilot-card h2 {
  font-size: clamp(2rem, 4vw, 3.8rem);
}
.section-intro p,
.analogy-copy p,
.pilot-card p,
.hero-lead {
  margin: 0;
  color: var(--ink-soft);
  font-size: clamp(1rem, 1.2vw, 1.1rem);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-h);
  backdrop-filter: blur(18px);
  background: rgba(246, 249, 252, 0.84);
  border-bottom: 1px solid rgba(191, 212, 232, 0.78);
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.04);
}
.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 900;
  letter-spacing: -0.02em;
}
.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: inline-grid;
  place-items: center;
  background: linear-gradient(180deg, #0f172a, #12243d);
  color: #fff;
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.18);
}
.brand-text { font-size: 1.05rem; }
.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}
.site-nav a,
.btn {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border-radius: 999px;
  font-weight: 700;
  transition: 160ms ease;
  white-space: nowrap;
}
.site-nav a:hover,
.site-nav a:focus-visible {
  background: rgba(255,255,255,0.9);
  box-shadow: var(--shadow-soft);
}
.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255,255,255,0.92);
  padding: 0;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 19px;
  height: 2px;
  background: var(--ink);
  margin: 4px auto;
  border-radius: 999px;
}
.btn { border: 1px solid transparent; cursor: pointer; }
.btn-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 18px 34px rgba(15, 23, 42, 0.15);
}
.btn-primary:hover { transform: translateY(-1px); }
.btn-secondary {
  background: rgba(255,255,255,0.92);
  border-color: var(--line);
  color: var(--ink);
}
.btn-secondary:hover { box-shadow: var(--shadow-soft); }
.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.hero {
  padding-top: 56px;
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 28px;
  align-items: center;
}
.hero-copy h1 {
  font-size: clamp(2.8rem, 6vw, 5.8rem);
  max-width: 11.5ch;
}
.hero-copy h1 span {
  display: block;
  color: #0f315a;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.hero-lead {
  max-width: 62ch;
}
.hero-points {
  margin-top: 30px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.point {
  padding: 18px;
  border-radius: 20px;
  background: rgba(255,255,255,0.76);
  border: 1px solid rgba(191, 212, 232, 0.72);
  min-height: 100%;
}
.point strong {
  display: block;
  margin-bottom: 5px;
  font-size: 0.98rem;
}
.point span {
  color: var(--ink-soft);
  font-size: 0.94rem;
}
.hero-visual {
  padding: 24px;
}
.hero-rail {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 14px;
  align-items: center;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.hero-rail span:nth-child(2) {
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(79, 124, 255, 0.2), rgba(24, 196, 176, 0.6));
}
.window-stack {
  position: relative;
  min-height: 500px;
  margin-top: 22px;
}
.mini-window {
  position: absolute;
  inset: auto;
  width: min(100%, 450px);
  padding: 18px 18px 20px;
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(255,255,255,0.96), rgba(250,252,255,0.96));
  border: 1px solid rgba(191, 212, 232, 0.74);
  box-shadow: 0 24px 54px rgba(15, 23, 42, 0.12);
}
.mini-window-left {
  left: 0;
  top: 50px;
  transform: rotate(-4deg);
}
.mini-window-right {
  right: 0;
  top: 130px;
  transform: rotate(4deg);
  border-color: rgba(24, 196, 176, 0.35);
}
.mini-topbar {
  display: flex;
  gap: 7px;
  margin-bottom: 14px;
}
.mini-topbar span {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: #d4dfec;
}
.mini-label {
  margin: 0 0 8px;
  color: #13887a;
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.mini-window h3 {
  margin: 0 0 10px;
  font-size: 1.2rem;
  line-height: 1.2;
  letter-spacing: -0.03em;
}
.mini-copy {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.96rem;
}
.mini-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.mini-meta span,
.meta-pill,
.toggle-btn,
.badge {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 10px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
}
.mini-meta span,
.meta-pill,
.badge {
  background: rgba(79, 124, 255, 0.08);
  color: #24456f;
  border: 1px solid rgba(79, 124, 255, 0.16);
}
.launch-grid {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.launch-grid div {
  padding: 12px;
  border-radius: 16px;
  background: rgba(24,196,176,0.08);
  border: 1px solid rgba(24,196,176,0.16);
}
.launch-grid strong,
.fit-item strong,
.route-card strong,
.compare-kicker,
.problem-card h3,
.workflow-card h3,
.outcome-card h3,
.panel h4,
.sidebar-box h3 {
  display: block;
  margin-bottom: 6px;
}
.launch-grid span,
.fit-item span,
.route-card span {
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.problem-strip {
  padding-top: 42px;
}
.problem-grid,
.workflow-grid,
.outcomes-grid,
.compare-grid {
  display: grid;
  gap: 18px;
}
.problem-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.problem-card,
.workflow-card,
.outcome-card,
.compare-card {
  padding: 24px;
}
.problem-card p,
.workflow-card p,
.outcome-card p,
.compare-card li,
.big-statement p,
.sidebar-box p,
.panel p,
.stage-copy p,
.fit-item span,
.route-card span,
.stage-list li,
#why-list li,
.panel li {
  color: var(--ink-soft);
}
.step-num {
  width: 40px;
  height: 40px;
  display: inline-grid;
  place-items: center;
  border-radius: 14px;
  background: rgba(24, 196, 176, 0.1);
  color: #11796d;
  font-weight: 800;
  margin-bottom: 16px;
}

.analogy-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 22px;
  align-items: center;
}
.analogy-visual {
  padding: 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 16px;
  align-items: center;
}
.analogy-label {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 800;
}
.room-tile,
.house-grid div {
  padding: 16px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.94);
  font-weight: 700;
}
.analogy-col {
  display: grid;
  gap: 10px;
}
.analogy-divider {
  font-size: 1.8rem;
  font-weight: 900;
  color: #11796d;
}
.house-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.whole-house {
  padding: 16px;
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(24, 196, 176, 0.08), rgba(79, 124, 255, 0.05));
}
.house-note {
  margin: 12px 0 0;
  font-weight: 700;
}

.demo-toolbar,
.demo-shell {
  padding: 22px;
}
.demo-toolbar {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-bottom: 18px;
}
.toolbar-label,
.sidebar-label,
.stage-label,
.panel-label {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.toggle-group,
.demo-steps {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.toggle-btn {
  background: rgba(255,255,255,0.96);
  border: 1px solid var(--line);
  color: var(--ink-soft);
  cursor: pointer;
  transition: 150ms ease;
}
.toggle-btn.active,
.toggle-btn:hover {
  color: var(--ink);
  border-color: rgba(24, 196, 176, 0.38);
  background: rgba(24, 196, 176, 0.08);
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.05);
}
.demo-steps {
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}
.demo-layout {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 22px;
  margin-top: 20px;
}
.demo-sidebar {
  display: grid;
  gap: 14px;
  align-content: start;
}
.sidebar-box {
  padding: 18px;
  border-radius: 20px;
  background: rgba(249, 251, 254, 0.9);
  border: 1px solid var(--line);
  min-height: 100%;
}
.sidebar-box h3 { margin: 0 0 8px; font-size: 1.08rem; line-height: 1.2; }
.sidebar-box p,
.sidebar-box ul { margin: 0; }
#why-list {
  padding-left: 18px;
  display: grid;
  gap: 8px;
}
.demo-stage-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 16px;
}
.demo-stage-header h3 {
  margin: 0;
  font-size: clamp(1.4rem, 2vw, 2rem);
  letter-spacing: -0.03em;
}
.assemble-btn { display: none; }
.assemble-btn.visible { display: inline-flex; }
.demo-panels {
  display: grid;
  grid-template-columns: minmax(260px, 0.44fr) minmax(0, 0.56fr);
  gap: 16px;
}
.panel {
  min-height: 440px;
  padding: 22px;
  border-radius: 24px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.94);
}
.panel-before {
  background: linear-gradient(180deg, rgba(250,252,255,0.98), rgba(245,249,253,0.98));
}
.panel-after {
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(250,252,255,0.98));
}
.panel h4 { margin: 0 0 10px; font-size: 1.22rem; line-height: 1.2; }
.meta-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.stage-copy h4,
.stage-block h4,
.route-list h4 {
  margin: 0 0 12px;
  font-size: 1.08rem;
}
.stage-copy p { margin: 0 0 14px; }
.stage-list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
}
.fit-grid,
.route-grid {
  display: grid;
  gap: 12px;
}
.fit-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.fit-item,
.route-card {
  padding: 16px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.96);
}
.fit-item.highlight {
  border-color: rgba(24,196,176,0.35);
  background: rgba(24,196,176,0.08);
}
.assembly-stack {
  display: grid;
  gap: 12px;
}
.assembly-item {
  opacity: 0.38;
  transform: translateY(8px);
  transition: 180ms ease;
  padding: 16px;
  border-radius: 18px;
  border: 1px dashed var(--line-strong);
  background: rgba(249, 251, 254, 0.9);
}
.assembly-item.revealed {
  opacity: 1;
  transform: translateY(0);
  border-style: solid;
  background: rgba(255,255,255,0.96);
}
.assembly-item header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 6px;
}
.route-card.best {
  border-color: rgba(24,196,176,0.35);
  background: linear-gradient(180deg, rgba(24,196,176,0.1), rgba(255,255,255,0.98));
}
.route-note {
  margin-top: 14px;
  padding: 14px 16px;
  border-radius: 16px;
  background: var(--warn);
  border: 1px solid #f0df9c;
  color: #6f5a15;
  font-weight: 600;
  line-height: 1.5;
}

.compare-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.compare-card ul {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 10px;
}
.compare-card.accent {
  border-color: rgba(24,196,176,0.32);
  background: linear-gradient(180deg, rgba(24,196,176,0.08), rgba(255,255,255,0.98));
}
.big-statement {
  margin-top: 18px;
  padding: 26px;
  text-align: center;
}
.big-statement strong {
  display: block;
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  letter-spacing: -0.03em;
}
.big-statement p { margin: 10px 0 0; }

.outcomes-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.pilot-card {
  padding: 30px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
}
.pilot-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-end;
}
.site-footer {
  padding: 30px 0 40px;
  border-top: 1px solid rgba(191, 212, 232, 0.65);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
}
.footer-inner p {
  margin: 6px 0 0;
  color: var(--muted);
}
.footer-inner a {
  font-weight: 700;
}

@media (max-width: 1120px) {
  .hero-grid,
  .analogy-grid,
  .demo-layout,
  .demo-panels,
  .pilot-card,
  .compare-grid,
  .outcomes-grid,
  .problem-grid,
  .workflow-grid,
  .hero-points {
    grid-template-columns: 1fr;
  }

  .window-stack {
    min-height: auto;
    display: grid;
    gap: 16px;
  }
  .mini-window {
    position: static;
    width: 100%;
    transform: none;
  }
  .demo-layout { gap: 18px; }
  .demo-panels { gap: 14px; }
  .pilot-actions { justify-content: flex-start; }
}

@media (max-width: 860px) {
  .section { padding: 74px 0; }
  .site-nav {
    position: absolute;
    top: calc(var(--header-h) - 1px);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 14px 16px 18px;
    background: rgba(246, 249, 252, 0.98);
    border-bottom: 1px solid var(--line);
  }
  .site-nav.open { display: flex; }
  .site-nav a {
    justify-content: flex-start;
    background: rgba(255,255,255,0.92);
    border: 1px solid var(--line);
  }
  .nav-toggle { display: inline-block; }
  .hero-copy h1 { max-width: none; }
  .demo-toolbar { grid-template-columns: 1fr; }
  .analogy-visual { grid-template-columns: 1fr; }
  .analogy-divider { display: none; }
}

@media (max-width: 560px) {
  .container { width: min(var(--content), calc(100% - 20px)); }
  .hero { padding-top: 36px; }
  .hero-actions, .pilot-actions { flex-direction: column; align-items: stretch; }
  .btn { width: 100%; }
  .hero-copy h1 { font-size: clamp(2.35rem, 11vw, 3.5rem); }
  .section-intro h2,
  .analogy-copy h2,
  .pilot-card h2 { font-size: clamp(1.9rem, 9vw, 2.7rem); }
  .card,
  .hero-visual,
  .demo-toolbar,
  .demo-shell,
  .pilot-card,
  .problem-card,
  .workflow-card,
  .outcome-card,
  .compare-card { border-radius: 22px; }
  .panel { min-height: auto; }
}