@font-face {
  font-family: "Manrope";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("./assets/fonts/manrope-400.ttf") format("truetype");
}

@font-face {
  font-family: "Manrope";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("./assets/fonts/manrope-500.ttf") format("truetype");
}

@font-face {
  font-family: "Manrope";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("./assets/fonts/manrope-600.ttf") format("truetype");
}

@font-face {
  font-family: "Manrope";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("./assets/fonts/manrope-700.ttf") format("truetype");
}

@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("./assets/fonts/ibm-plex-mono-400.ttf") format("truetype");
}

@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("./assets/fonts/ibm-plex-mono-500.ttf") format("truetype");
}

:root {
  color-scheme: light dark;
  --bg: #ecece7;
  --surface: #f6f6f1;
  --surface-strong: #deded7;
  --ink: #171715;
  --muted: #5c5c55;
  --line: #b9b9b0;
  --accent: #d65324;
  --accent-ink: #fff8f2;
  --dark: #1d1d1a;
  --dark-muted: #aaa99f;
  --radius: 4px;
  --page: min(1400px, calc(100vw - 48px));
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171715;
    --surface: #20201d;
    --surface-strong: #2b2b27;
    --ink: #efefe9;
    --muted: #aaa99f;
    --line: #44443e;
    --accent: #e06132;
    --accent-ink: #171715;
    --dark: #10100f;
    --dark-muted: #a8a79d;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family: "Manrope", sans-serif;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: 20;
  pointer-events: none;
  content: "";
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.8'/%3E%3C/svg%3E");
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input {
  font: inherit;
}

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

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  transform: translateY(-150%);
  border-radius: var(--radius);
  background: var(--accent);
  color: var(--accent-ink);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: var(--page);
  height: 72px;
  margin: 0 auto;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-mark {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  width: 22px;
  height: 22px;
  padding: 4px;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
}

.brand-mark span {
  display: block;
  width: 3px;
  background: var(--accent);
}

.brand-mark span:nth-child(1) {
  height: 5px;
}

.brand-mark span:nth-child(2) {
  height: 9px;
}

.brand-mark span:nth-child(3) {
  height: 13px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  font-size: 0.82rem;
  font-weight: 600;
}

.site-nav a:not(.nav-cta) {
  color: var(--muted);
  transition: color 180ms ease;
}

.site-nav a:not(.nav-cta):hover {
  color: var(--ink);
}

.nav-cta {
  padding: 10px 15px;
  border-radius: var(--radius);
  background: var(--ink);
  color: var(--bg);
  transition: transform 180ms ease, background 180ms ease;
}

.nav-cta:hover {
  background: var(--accent);
  color: var(--accent-ink);
}

.nav-cta:active,
.button:active {
  transform: translateY(1px);
}

.menu-toggle {
  display: none;
}

.hero {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: clamp(36px, 6vw, 96px);
  align-items: center;
  width: var(--page);
  min-height: calc(100dvh - 72px);
  margin: 0 auto;
  padding: 48px 0 64px;
}

.hero-copy {
  position: relative;
  z-index: 1;
}

.eyebrow,
.kicker,
.flow-index,
.comparison-label {
  margin: 0 0 24px;
  color: var(--accent);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 10ch;
  margin-bottom: 28px;
  font-size: clamp(3.6rem, 6.3vw, 6.8rem);
  line-height: 0.94;
  letter-spacing: -0.075em;
}

.hero-intro {
  max-width: 36rem;
  margin-bottom: 36px;
  color: var(--muted);
  font-size: clamp(1rem, 1.4vw, 1.2rem);
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 24px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border: 0;
  border-radius: var(--radius);
  font-weight: 700;
  white-space: nowrap;
  cursor: pointer;
  transition: transform 180ms ease, background 180ms ease;
}

.button-primary {
  background: var(--accent);
  color: var(--accent-ink);
}

.button-primary:hover {
  background: var(--ink);
  color: var(--bg);
}

.text-link {
  padding-bottom: 4px;
  border-bottom: 1px solid var(--ink);
  font-size: 0.9rem;
  font-weight: 600;
}

.hero-visual {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  background: #292927;
}

.hero-visual::after {
  position: absolute;
  inset: 0;
  content: "";
  box-shadow: inset 0 0 0 1px rgb(255 255 255 / 0.1);
  pointer-events: none;
}

.hero-visual img {
  width: 100%;
  height: clamp(480px, 68dvh, 720px);
  object-fit: cover;
}

.hero-visual figcaption {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  display: flex;
  justify-content: space-between;
  padding: 14px 18px;
  background: rgb(18 18 17 / 0.82);
  color: #d5d4cc;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.65rem;
  letter-spacing: 0.04em;
  backdrop-filter: blur(12px);
}

.equation-band {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: center;
  gap: 28px;
  width: 100%;
  padding: 24px max(24px, calc((100vw - 1400px) / 2));
  background: var(--accent);
  color: var(--accent-ink);
  font-family: "IBM Plex Mono", monospace;
  font-size: clamp(0.68rem, 1vw, 0.82rem);
  text-align: center;
  text-transform: uppercase;
}

.equation-band p {
  margin: 0;
}

.equation-band span {
  font-size: 1.3rem;
}

.section-shell {
  width: var(--page);
  margin: 0 auto;
}

.principle {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 10vw;
  padding-top: clamp(96px, 13vw, 180px);
  padding-bottom: clamp(96px, 13vw, 180px);
}

.principle-statement h2,
.system-copy h2,
.comparison-title h2,
.applications-copy h2,
.pilot-copy h2 {
  margin-bottom: 28px;
  font-size: clamp(2.5rem, 5vw, 5.5rem);
  line-height: 1;
  letter-spacing: -0.065em;
}

.principle-statement > p:last-child,
.system-copy > p,
.applications-copy > p,
.pilot-copy > p {
  max-width: 38rem;
  color: var(--muted);
  line-height: 1.7;
}

.energy-ledger {
  align-self: end;
  padding: clamp(28px, 5vw, 64px);
  border-radius: var(--radius);
  background: var(--surface);
}

.ledger-input {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
}

.ledger-value {
  font-size: clamp(3rem, 7vw, 7rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.07em;
}

.ledger-label,
.ledger-outputs span {
  color: var(--muted);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.68rem;
}

.ledger-line {
  position: relative;
  height: 2px;
  margin: 42px 0;
  background: var(--line);
}

.ledger-line span {
  position: absolute;
  top: -4px;
  right: 22%;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
}

.ledger-outputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.ledger-outputs div {
  display: grid;
  gap: 8px;
}

.ledger-outputs strong {
  font-size: 1rem;
}

.system {
  padding-bottom: clamp(96px, 13vw, 180px);
}

.system-copy {
  max-width: 780px;
  margin: 0 0 72px auto;
}

.flow {
  display: grid;
  grid-template-columns: 1fr minmax(40px, 0.2fr) 1fr minmax(40px, 0.2fr) 1fr;
  align-items: stretch;
}

.flow-node {
  min-height: 290px;
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.flow-node h3 {
  margin: 62px 0 18px;
  font-size: clamp(1.4rem, 2vw, 2rem);
  letter-spacing: -0.04em;
}

.flow-node p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.flow-node-accent {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--accent-ink);
}

.flow-node-accent .flow-index,
.flow-node-accent p {
  color: var(--accent-ink);
}

.flow-connector {
  display: flex;
  align-items: center;
}

.flow-connector span {
  display: block;
  width: 100%;
  height: 1px;
  background: var(--line);
}

.comparison {
  padding: clamp(96px, 12vw, 160px) 0;
  background: var(--dark);
  color: #efefe9;
}

.comparison-title {
  max-width: 850px;
  margin-bottom: 80px;
}

.comparison-columns {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 1px;
  background: #4a4a45;
}

.comparison-columns article {
  min-height: 330px;
  padding: clamp(28px, 5vw, 64px);
  background: var(--dark);
}

.comparison-columns h3 {
  max-width: 12ch;
  margin: 80px 0 20px;
  font-size: clamp(2rem, 3.5vw, 4rem);
  line-height: 1;
  letter-spacing: -0.055em;
}

.comparison-columns article > p:last-child {
  max-width: 36rem;
  margin: 0;
  color: var(--dark-muted);
  line-height: 1.65;
}

.comparison-better {
  box-shadow: inset 5px 0 0 var(--accent);
}

.comparison-better .comparison-label {
  color: var(--accent);
}

.applications {
  padding-top: clamp(96px, 13vw, 180px);
  padding-bottom: clamp(96px, 13vw, 180px);
}

.applications-copy {
  max-width: 700px;
  margin-bottom: 72px;
}

.application-grid {
  display: grid;
  grid-template-columns: 1.45fr 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 12px;
}

.application-grid article {
  min-height: 250px;
  padding: 28px;
  border-radius: var(--radius);
  background: var(--surface);
}

.application-grid h3 {
  max-width: 15ch;
  margin: 0 0 14px;
  font-size: clamp(1.25rem, 2vw, 1.8rem);
  line-height: 1.1;
  letter-spacing: -0.04em;
}

.application-grid p {
  max-width: 30rem;
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.6;
}

.application-feature {
  grid-row: 1 / 3;
}

.application-image {
  height: 320px;
  margin: -28px -28px 28px;
  overflow: hidden;
  border-radius: var(--radius) var(--radius) 0 0;
}

.application-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 75% center;
}

.application-dark {
  background: var(--dark) !important;
  color: #efefe9;
}

.application-dark p {
  color: var(--dark-muted);
}

.pilot {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 10vw;
  align-items: end;
  padding-top: clamp(80px, 10vw, 140px);
  padding-bottom: clamp(80px, 10vw, 140px);
  border-top: 1px solid var(--line);
}

.pilot-form {
  padding: 32px;
  border-radius: var(--radius);
  background: var(--surface);
}

.form-field {
  display: grid;
  gap: 9px;
  margin-bottom: 20px;
}

.honeypot {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

label {
  font-size: 0.82rem;
  font-weight: 700;
}

input {
  min-width: 0;
  height: 52px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  outline: none;
  background: var(--bg);
  color: var(--ink);
}

input::placeholder {
  color: var(--muted);
  opacity: 0.85;
}

input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent);
}

input[aria-invalid="true"] {
  border-color: #b3342e;
}

.field-help,
.field-error,
.form-status {
  font-size: 0.72rem;
  line-height: 1.4;
}

.field-help {
  color: var(--muted);
}

.field-error {
  color: #b3342e;
}

.pilot-form .button {
  width: 100%;
}

.pilot-form .button:disabled {
  cursor: wait;
  opacity: 0.72;
}

.form-status {
  min-height: 1.2em;
  margin: 14px 0 0;
  color: var(--muted);
}

.form-status.is-success {
  color: var(--ink);
}

.form-status.is-error {
  color: #b3342e;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  width: var(--page);
  min-height: 120px;
  margin: 0 auto;
  border-top: 1px solid var(--line);
  font-size: 0.78rem;
}

.site-footer p {
  margin: 0;
  color: var(--muted);
}

.site-footer > a:last-child {
  justify-self: end;
  font-family: "IBM Plex Mono", monospace;
}

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

@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 700ms cubic-bezier(0.16, 1, 0.3, 1),
      transform 700ms cubic-bezier(0.16, 1, 0.3, 1);
  }

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

  .hero-copy {
    animation: hero-in 800ms 120ms cubic-bezier(0.16, 1, 0.3, 1) both;
  }

  .hero-visual {
    animation: hero-in 900ms 220ms cubic-bezier(0.16, 1, 0.3, 1) both;
  }
}

@keyframes hero-in {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1024px) {
  :root {
    --page: min(100% - 32px, 720px);
  }

  .menu-toggle {
    display: inline-flex;
    padding: 8px 0;
    border: 0;
    background: transparent;
    color: var(--ink);
    font-size: 0.8rem;
    font-weight: 700;
    cursor: pointer;
  }

  .menu-close {
    display: none;
  }

  .menu-toggle[aria-expanded="true"] .menu-open {
    display: none;
  }

  .menu-toggle[aria-expanded="true"] .menu-close {
    display: inline;
  }

  .site-nav {
    position: absolute;
    top: 72px;
    right: 0;
    left: 0;
    display: none;
    align-items: stretch;
    gap: 0;
    padding: 16px;
    border-bottom: 1px solid var(--line);
    background: var(--bg);
  }

  .site-nav.is-open {
    display: grid;
  }

  .site-nav a {
    padding: 14px 0;
  }

  .site-nav .nav-cta {
    margin-top: 8px;
    padding: 13px 15px;
    text-align: center;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 64px 0;
  }

  .hero-copy {
    max-width: 700px;
  }

  h1 {
    max-width: 9ch;
    font-size: clamp(3.4rem, 12vw, 6rem);
  }

  .hero-visual img {
    height: 560px;
  }

  .principle,
  .pilot {
    grid-template-columns: 1fr;
    gap: 64px;
  }

  .system-copy {
    margin-left: 0;
  }

  .flow {
    grid-template-columns: 1fr;
  }

  .flow-connector {
    width: 1px;
    height: 40px;
    margin-left: 32px;
  }

  .flow-connector span {
    width: 1px;
    height: 100%;
  }

  .application-grid {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto;
  }

  .application-feature {
    grid-column: 1 / 3;
    grid-row: auto;
  }

  .site-footer {
    grid-template-columns: 1fr auto;
  }

  .site-footer p {
    display: none;
  }
}

@media (max-width: 600px) {
  .site-header {
    height: 64px;
  }

  .site-nav {
    top: 64px;
  }

  .hero {
    gap: 28px;
    padding: 32px 0;
  }

  h1 {
    font-size: clamp(3rem, 15vw, 4.4rem);
  }

  .hero-actions {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero-visual img {
    height: 290px;
    object-position: 69% center;
  }

  .equation-band {
    grid-template-columns: 1fr;
    gap: 10px;
    padding-block: 28px;
  }

  .equation-band span {
    transform: rotate(90deg);
  }

  .principle-statement h2,
  .system-copy h2,
  .comparison-title h2,
  .applications-copy h2,
  .pilot-copy h2 {
    font-size: clamp(2.4rem, 12vw, 3.5rem);
  }

  .ledger-input {
    display: grid;
  }

  .ledger-label {
    order: -1;
  }

  .ledger-outputs {
    grid-template-columns: 1fr;
  }

  .comparison-columns {
    grid-template-columns: 1fr;
  }

  .comparison-better {
    box-shadow: inset 0 5px 0 var(--accent);
  }

  .comparison-columns h3 {
    margin-top: 48px;
  }

  .application-grid {
    grid-template-columns: 1fr;
  }

  .application-feature {
    grid-column: auto;
  }

  .application-grid article {
    min-height: 220px;
  }

  .site-footer {
    grid-template-columns: 1fr;
    gap: 14px;
    align-content: center;
    padding: 30px 0;
  }

  .site-footer > a:last-child {
    justify-self: start;
  }
}

@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;
  }
}