/* Signal Atomic: site */

:root {
  --navy: #101a2b;
  --navy-deep: #0a111d;
  --navy-soft: #1a2740;
  --orange: #f0592a;
  --orange-soft: #ff7a4d;
  --cream: #f4efe6;
  --cream-deep: #e9e2d4;
  --ink: #17202e;
  --ink-muted: #4d586b;
  --line: rgba(23, 32, 46, 0.16);
  --line-strong: rgba(23, 32, 46, 0.3);
  --white: #fbf9f4;
  --max: 1120px;
  --nav-h: 4.5rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font-display: "Space Grotesk", sans-serif;
  --font-mono: "Space Mono", monospace;
  --font-body: "Source Serif 4", Georgia, serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 17px;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(ellipse 90% 70% at 85% -5%, rgba(240, 89, 42, 0.1), transparent 55%),
    radial-gradient(ellipse 100% 60% at 0% 110%, rgba(16, 26, 43, 0.06), transparent 50%),
    linear-gradient(180deg, var(--cream) 0%, var(--cream-deep) 100%);
  background-attachment: fixed;
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
  height: auto;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--orange);
}

:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -100%;
  z-index: 100;
  background: var(--navy);
  color: var(--white);
  padding: 0.75rem 1rem;
  font-family: var(--font-display);
  font-size: 0.875rem;
}

.skip-link:focus {
  top: 1rem;
}

/* Atom mark */

.atom {
  position: relative;
  display: inline-block;
  width: 1.1em;
  height: 1.1em;
  flex: none;
}

.atom::before,
.atom::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1.5px solid currentColor;
  border-radius: 50%;
}

.atom::before {
  transform: rotate(0deg);
}

.atom::after {
  transform: rotate(60deg) scaleY(0.32);
}

.atom .e {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 0.22em;
  height: 0.22em;
  margin: -0.11em;
  border-radius: 50%;
  background: var(--orange);
}

.atom .e:first-child {
  transform: translate(0, -0.42em);
}

/* Nav */

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: background 0.4s var(--ease), backdrop-filter 0.4s var(--ease);
}

.site-header.is-solid,
.site-header.page-header {
  background: rgba(244, 239, 230, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.site-header.hero-over {
  color: var(--white);
}

.site-header.hero-over.is-solid {
  color: var(--ink);
}

.nav-inner {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  text-decoration: none;
  white-space: nowrap;
}

.brand .atom {
  color: var(--orange);
  font-size: 1.45em;
}

.brand:hover {
  color: inherit;
  opacity: 0.85;
}

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  padding: 0.5rem;
  cursor: pointer;
  color: inherit;
}

.nav-toggle span {
  display: block;
  width: 1.35rem;
  height: 1.5px;
  background: currentColor;
  margin: 5px 0;
  transition: transform 0.3s var(--ease), opacity 0.3s;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.nav-links a {
  display: inline-block;
  line-height: 1.2;
  text-decoration: none;
  opacity: 0.8;
  transition: opacity 0.2s;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  opacity: 1;
  color: inherit;
}

.nav-links a[aria-current="page"] {
  box-shadow: inset 0 -1.5px 0 var(--orange);
}

@media (max-width: 900px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    inset: var(--nav-h) 0 auto;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: rgba(244, 239, 230, 0.98);
    border-bottom: 1px solid var(--line);
    padding: 0.5rem 1.25rem 1rem;
    transform: translateY(-140%);
    transition: transform 0.35s var(--ease);
  }

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: 0.7rem 0;
    width: 100%;
    border-bottom: 1px solid var(--line);
    color: var(--ink);
  }

  .site-header.nav-open .nav-links {
    transform: translateY(0);
  }
}

/* Layout */

.wrap {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

.section {
  padding: clamp(4rem, 10vw, 7rem) 0;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--orange);
  margin: 0 0 1rem;
}

.section h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.85rem, 4vw, 2.75rem);
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 1.25rem;
  max-width: 20ch;
}

.section .lede {
  max-width: 38rem;
  color: var(--ink-muted);
  margin: 0 0 2.5rem;
  font-size: 1.2rem;
}

/* Hero */

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: center;
  color: var(--white);
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 80% 20%, rgba(240, 89, 42, 0.22), transparent 55%),
    radial-gradient(ellipse 120% 80% at 10% 110%, rgba(26, 39, 64, 0.9), transparent 60%),
    linear-gradient(160deg, var(--navy-soft) 0%, var(--navy) 45%, var(--navy-deep) 100%);
}

.hero-orbit {
  position: absolute;
  right: -8vmin;
  top: 50%;
  transform: translateY(-50%);
  width: 62vmin;
  height: 62vmin;
  opacity: 0.6;
  z-index: 0;
  pointer-events: none;
}

.hero-orbit .ring {
  position: absolute;
  inset: 0;
  border: 1px solid rgba(244, 239, 230, 0.35);
  border-radius: 50%;
}

.hero-orbit .ring:nth-child(2) {
  transform: rotate(60deg) scaleY(0.38);
}

.hero-orbit .ring:nth-child(3) {
  transform: rotate(-60deg) scaleY(0.38);
}

.hero-orbit .nucleus {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 6vmin;
  height: 6vmin;
  margin: -3vmin;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, var(--orange-soft), var(--orange) 70%);
  box-shadow: 0 0 6vmin rgba(240, 89, 42, 0.5);
  animation: nucleus-pulse 6s ease-in-out infinite;
}

.hero-orbit .electron {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 1.6vmin;
  height: 1.6vmin;
  margin: -0.8vmin;
  border-radius: 50%;
  background: var(--cream);
  animation: orbit-spin 14s linear infinite;
  transform-origin: center;
}

.hero-orbit .electron:nth-child(5) {
  animation-duration: 20s;
  animation-direction: reverse;
  background: var(--orange-soft);
}

@keyframes orbit-spin {
  from { transform: rotate(0deg) translateX(31vmin); }
  to { transform: rotate(360deg) translateX(31vmin); }
}

@keyframes nucleus-pulse {
  0%, 100% { box-shadow: 0 0 6vmin rgba(240, 89, 42, 0.45); }
  50% { box-shadow: 0 0 10vmin rgba(240, 89, 42, 0.7); }
}

@media (prefers-reduced-motion: reduce) {
  .hero-orbit .electron,
  .hero-orbit .nucleus {
    animation: none;
  }
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(100% - 2.5rem, var(--max));
  margin: 0 auto;
  padding: calc(var(--nav-h) + 2rem) 0 clamp(3.5rem, 8vw, 5.5rem);
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.1rem, 5.5vw, 3.75rem);
  letter-spacing: -0.025em;
  line-height: 1.08;
  margin: 0 0 1.25rem;
  max-width: 20ch;
  opacity: 0;
  transform: translateY(1.25rem);
  animation: rise 0.9s var(--ease) 0.2s forwards;
}

.hero-support {
  margin: 0 0 1.75rem;
  max-width: 36rem;
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  line-height: 1.5;
  color: rgba(244, 239, 230, 0.82);
  opacity: 0;
  transform: translateY(1.25rem);
  animation: rise 0.9s var(--ease) 0.4s forwards;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  opacity: 0;
  transform: translateY(1.25rem);
  animation: rise 0.9s var(--ease) 0.55s forwards;
}

.hero-ticks {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.6rem;
  margin: 2.25rem 0 0;
  padding: 0;
  max-width: 40rem;
  opacity: 0;
  transform: translateY(1.25rem);
  animation: rise 0.9s var(--ease) 0.7s forwards;
}

.hero-ticks li {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(244, 239, 230, 0.7);
  border: 1px solid rgba(244, 239, 230, 0.22);
  border-radius: 999px;
  padding: 0.4rem 0.8rem;
}

.hero-ticks li::before {
  content: "";
  display: inline-block;
  width: 0.45em;
  height: 0.45em;
  margin-right: 0.55em;
  border-radius: 50%;
  background: var(--orange);
  vertical-align: 0.05em;
}

@media (max-width: 700px) {
  .hero-orbit {
    right: 50%;
    top: 30%;
    transform: translateX(50%);
    width: 110vmin;
    height: 110vmin;
    opacity: 0.28;
  }

  .hero-ticks {
    margin-top: 1.75rem;
  }
}

@keyframes rise {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero h1,
  .hero-support,
  .hero-cta,
  .hero-ticks,
  .reveal {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid currentColor;
  cursor: pointer;
  padding: 0.95rem 1.6rem;
  transition: background 0.25s var(--ease), color 0.25s, border-color 0.25s, transform 0.25s var(--ease);
}

.btn:hover {
  color: inherit;
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--orange-soft);
  border-color: var(--orange-soft);
  color: var(--white);
}

.btn-solid {
  background: var(--navy);
  border-color: var(--navy);
  color: var(--white);
}

.btn-solid:hover {
  background: var(--navy-deep);
  border-color: var(--navy-deep);
  color: var(--white);
}

.btn-ghost {
  background: transparent;
  color: inherit;
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.08);
}

/* Doors (home capability index) */

.doors {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.doors li {
  border-bottom: 1px solid var(--line);
}

.doors a,
.doors.symptoms li,
.doors-three > div {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 1rem 2rem;
  align-items: baseline;
  padding: 1.75rem 0;
  text-decoration: none;
}

.doors-three {
  border-top: 1px solid var(--line);
}

.doors-three > div {
  border-bottom: 1px solid var(--line);
}

.doors.symptoms li h3,
.doors-three > div h3 {
  grid-column: 2;
}

.doors.symptoms li p,
.doors-three > div p {
  grid-column: 2;
  margin: 0;
  color: var(--ink-muted);
  font-size: 1.05rem;
  max-width: 38rem;
}

.symptom-bridge {
  margin-top: 2rem;
  font-size: 1.05rem;
  color: var(--ink-muted);
  max-width: 34rem;
}

.symptom-bridge a {
  color: var(--navy);
  font-weight: 600;
}

.doors a {
  transition: padding-left 0.35s var(--ease);
}

.doors a:hover {
  padding-left: 0.5rem;
  color: var(--navy);
}

.door-step {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--orange);
}

.door-tag {
  grid-column: 2;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 0.4rem;
}

.doors h3 {
  grid-column: 2;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.5vw, 1.65rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 0.35rem;
}

.doors p {
  grid-column: 2;
  margin: 0;
  color: var(--ink-muted);
  font-size: 1.05rem;
  max-width: 38rem;
}

.doors .arrow {
  grid-column: 3;
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--orange);
  align-self: center;
  transition: transform 0.3s var(--ease);
}

.doors a:hover .arrow {
  transform: translateX(4px);
}

/* Big statement band */

.statement-band {
  background: var(--navy);
  color: var(--cream);
  padding: clamp(4rem, 9vw, 6.5rem) 0;
  position: relative;
  overflow: hidden;
}

.statement-band::after {
  content: "";
  position: absolute;
  right: -10vmin;
  bottom: -25vmin;
  width: 60vmin;
  height: 60vmin;
  border: 1px solid rgba(244, 239, 230, 0.14);
  border-radius: 50%;
  pointer-events: none;
}

.statement-band p {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.5rem, 4vw, 2.4rem);
  line-height: 1.3;
  letter-spacing: -0.02em;
  max-width: 30ch;
  margin: 0;
}

.statement-band p .hl {
  color: var(--orange-soft);
}

/* Split media (no photos; use diagram panels) */

.split {
  display: grid;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

@media (min-width: 860px) {
  .split {
    grid-template-columns: 1.05fr 0.95fr;
  }

  .split.reverse {
    grid-template-columns: 0.95fr 1.05fr;
  }

  .split.reverse .split-media {
    order: 2;
  }

  .split.reverse .split-copy {
    order: 1;
  }
}

.diagram-panel {
  background: var(--navy);
  color: var(--cream);
  border-radius: 4px;
  padding: 2.5rem;
  aspect-ratio: 4 / 3;
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
}

.diagram-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 75% 25%, rgba(240, 89, 42, 0.16), transparent 60%);
}

.diagram-panel .atom {
  color: var(--orange);
  font-size: 9rem;
}

.photo-panel {
  margin: 0;
  background: var(--navy);
  border-radius: 4px;
  overflow: hidden;
  aspect-ratio: 2 / 3;
}

.photo-panel img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

.split-copy h2 {
  max-width: 16ch;
}

/* Prose */

.prose {
  max-width: 40rem;
}

.prose p {
  margin: 0 0 1.25rem;
  color: var(--ink-muted);
}

.prose p:last-child {
  margin-bottom: 0;
}

.prose strong {
  color: var(--ink);
  font-weight: 600;
}

/* Page hero (inner) */

.page-hero {
  padding: calc(var(--nav-h) + clamp(3rem, 8vw, 5rem)) 0 clamp(2.5rem, 6vw, 4rem);
  border-bottom: 1px solid var(--line);
}

.page-hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.25rem, 5.5vw, 3.5rem);
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin: 0 0 0.75rem;
  max-width: 22ch;
}

.page-hero .lede {
  margin: 0;
  max-width: 38rem;
  color: var(--ink-muted);
  font-size: clamp(1.1rem, 2vw, 1.25rem);
}

/* Detail grid */

.detail-grid {
  display: grid;
  gap: 2rem 3rem;
  margin-top: 3rem;
}

@media (min-width: 700px) {
  .detail-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.detail-grid h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 0.5rem;
}

.detail-grid p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 1.05rem;
}

/* Steps */

.steps {
  list-style: none;
  margin: 2.5rem 0 0;
  padding: 0;
  counter-reset: step;
}

.steps li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 1.25rem;
  padding: 1.75rem 0;
  border-top: 1px solid var(--line);
}

.steps li:last-child {
  border-bottom: 1px solid var(--line);
}

.steps li::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  color: var(--orange);
  padding-top: 0.2rem;
}

.steps h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0 0 0.4rem;
}

.steps p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 1.05rem;
}

/* Intake list */

.intake-list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
}

.intake-list li {
  position: relative;
  padding: 0.85rem 0 0.85rem 1.4rem;
  border-top: 1px solid var(--line);
  color: var(--ink-muted);
  font-size: 1.05rem;
}

.intake-list li:last-child {
  border-bottom: 1px solid var(--line);
}

.intake-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.5rem;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--orange);
}

/* Fit block */

.fit-block {
  margin-top: 3rem;
  padding-top: 0.5rem;
}

/* CTA band */

.cta-band {
  background: var(--orange);
  color: var(--white);
  padding: clamp(3.5rem, 8vw, 5.5rem) 0;
}

.cta-band h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 0.75rem;
  max-width: 20ch;
  color: var(--white);
}

.cta-band p {
  margin: 0 0 1.75rem;
  max-width: 34rem;
  color: rgba(255, 251, 245, 0.85);
}

.cta-band .btn-ghost {
  border-color: var(--white);
}

.cta-band .btn-ghost:hover {
  background: rgba(255, 255, 255, 0.14);
}

/* Contact */

.contact-panel {
  max-width: 40rem;
  padding: 2.5rem 0 1rem;
}

.contact-panel > p {
  color: var(--ink-muted);
  margin: 0 0 1.5rem;
}

.contact-expect {
  list-style: none;
  margin: 2.5rem 0 0;
  padding: 0;
}

.contact-expect li {
  padding: 1.25rem 0;
  border-top: 1px solid var(--line);
}

.contact-expect li:last-child {
  border-bottom: 1px solid var(--line);
}

.contact-expect h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 0.35rem;
}

.contact-expect p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 1.05rem;
}

.contact-email {
  margin-top: 2rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.contact-email a {
  color: var(--navy);
  text-decoration: none;
}

.contact-email a:hover {
  color: var(--orange);
  text-decoration: underline;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0 2.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.footer-inner {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
}

.site-footer a {
  text-decoration: none;
}

/* Reveal */

.reveal {
  opacity: 0;
  transform: translateY(1rem);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

/* Pull quote */

.pull {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.4rem, 3.2vw, 2rem);
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin: 0 0 1.5rem;
  max-width: 26ch;
}