@font-face {
  font-family: "Inter";
  src: url("../fonts/inter-latin.woff2") format("woff2");
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
}

:root {
  --protocol-paper: #f4f0e9;
  --protocol-paper-strong: #fffdf9;
  --protocol-ink: #202123;
  --protocol-muted: #6f675f;
  --protocol-copper: #b97850;
  --protocol-copper-dark: #8f5534;
  --protocol-green: #647d68;
  --protocol-line: rgba(32, 33, 35, 0.16);
  --protocol-line-dark: rgba(255, 255, 255, 0.16);
  --protocol-shell: min(1240px, calc(100vw - 80px));
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--protocol-paper);
  color: var(--protocol-ink);
  font-family: "Inter", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}

body,
button,
a {
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

p,
h1,
h2,
h3,
ol,
ul,
dl,
dd {
  margin: 0;
}

ul,
ol {
  padding: 0;
}

:focus-visible {
  outline: 3px solid var(--protocol-copper);
  outline-offset: 4px;
}

.protocol-shell {
  width: var(--protocol-shell);
  margin-inline: auto;
}

.protocol-skip {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  background: var(--protocol-paper-strong);
  color: var(--protocol-ink);
  font-weight: 700;
  translate: 0 -160%;
}

.protocol-skip:focus {
  translate: 0;
}

.protocol-header {
  position: relative;
  z-index: 10;
  border-bottom: 1px solid var(--protocol-line);
  background: rgba(244, 240, 233, 0.94);
  backdrop-filter: blur(12px);
}

.protocol-header__inner {
  display: grid;
  min-height: 92px;
  grid-template-columns: minmax(180px, 1fr) auto minmax(180px, 1fr);
  align-items: center;
  gap: 32px;
}

.protocol-brand {
  width: 156px;
}

.protocol-header__nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  min-width: 0;
}

.protocol-header__label {
  color: var(--protocol-muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.protocol-home-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--protocol-ink);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.1em;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
}

.protocol-home-link span {
  color: var(--protocol-copper-dark);
  transition: translate 180ms ease;
}

.protocol-home-link:hover span,
.protocol-home-link:focus-visible span {
  translate: 3px 0;
}

.protocol-header__cta,
.protocol-button {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 0 24px;
  border: 1px solid var(--protocol-ink);
  background: var(--protocol-ink);
  color: var(--protocol-paper-strong);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.11em;
  text-decoration: none;
  text-transform: uppercase;
  transition: background-color 180ms ease, color 180ms ease, translate 180ms ease;
}

.protocol-header__cta {
  justify-self: end;
}

.protocol-header__cta:hover,
.protocol-button:hover {
  background: var(--protocol-copper-dark);
  border-color: var(--protocol-copper-dark);
  translate: 0 -2px;
}

.protocol-hero {
  padding-block: clamp(72px, 8vw, 126px);
  overflow: hidden;
}

.protocol-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.87fr) minmax(440px, 1.13fr);
  align-items: center;
  gap: clamp(54px, 8vw, 126px);
}

.protocol-eyebrow,
.protocol-index {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--protocol-copper-dark);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.protocol-eyebrow span {
  display: inline-grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid var(--protocol-copper);
}

.protocol-hero h1 {
  max-width: 670px;
  margin-top: 28px;
  font-size: clamp(48px, 5.5vw, 82px);
  font-weight: 680;
  letter-spacing: -0.065em;
  line-height: 0.96;
}

.protocol-hero__lead {
  max-width: 650px;
  margin-top: 30px;
  color: var(--protocol-muted);
  font-size: clamp(18px, 1.6vw, 23px);
  line-height: 1.55;
}

.protocol-hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 26px;
  margin-top: 38px;
}

.protocol-text-link {
  padding-block: 8px;
  border-bottom: 1px solid var(--protocol-ink);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
}

.protocol-signals {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  margin-top: 44px;
  color: var(--protocol-muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  list-style: none;
  text-transform: uppercase;
}

.protocol-signals li::before {
  color: var(--protocol-copper);
  content: "■";
  font-size: 7px;
  margin-right: 10px;
  vertical-align: 2px;
}

.protocol-demo {
  position: relative;
  padding: clamp(24px, 3vw, 40px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: var(--protocol-ink);
  box-shadow: 0 34px 80px rgba(32, 33, 35, 0.22);
  color: var(--protocol-paper-strong);
}

.protocol-demo::before {
  position: absolute;
  z-index: -1;
  inset: 20px -22px -22px 24px;
  border: 1px solid var(--protocol-copper);
  content: "";
}

.protocol-demo__topbar,
.protocol-demo__heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.protocol-demo__topbar {
  padding-bottom: 22px;
  border-bottom: 1px solid var(--protocol-line-dark);
  font-size: 10px;
  letter-spacing: 0.13em;
}

.protocol-demo__topbar > div {
  display: flex;
  align-items: center;
  gap: 12px;
}

.protocol-demo__mark {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--protocol-copper);
}

.protocol-demo__status {
  padding: 5px 9px;
  border-radius: 2px;
  background: var(--protocol-green);
  font-weight: 800;
}

.protocol-demo__heading {
  padding-block: 25px 18px;
}

.protocol-demo__heading p {
  font-size: clamp(20px, 2vw, 28px);
  font-weight: 680;
  letter-spacing: -0.035em;
}

.protocol-demo__heading span {
  color: rgba(255, 255, 255, 0.58);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.protocol-demo__steps {
  border-top: 1px solid var(--protocol-line-dark);
  list-style: none;
}

.protocol-demo__steps li {
  display: grid;
  min-height: 68px;
  grid-template-columns: 44px 1fr 30px;
  align-items: center;
  gap: 14px;
  border-bottom: 1px solid var(--protocol-line-dark);
}

.protocol-demo__steps li > span {
  color: var(--protocol-copper);
  font-size: 13px;
  font-weight: 800;
}

.protocol-demo__steps strong,
.protocol-demo__steps small {
  display: block;
}

.protocol-demo__steps strong {
  font-size: 13px;
  font-weight: 670;
}

.protocol-demo__steps small {
  margin-top: 2px;
  color: rgba(255, 255, 255, 0.5);
  font-size: 10px;
}

.protocol-demo__steps i {
  display: grid;
  width: 26px;
  height: 26px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: rgba(255, 255, 255, 0.48);
  font-size: 9px;
  font-style: normal;
}

.protocol-demo__steps .is-complete i {
  border-color: var(--protocol-green);
  background: var(--protocol-green);
  color: white;
}

.protocol-demo__steps .is-progress {
  background: rgba(185, 120, 80, 0.09);
}

.protocol-demo__steps .is-progress i {
  border-color: var(--protocol-copper);
  color: var(--protocol-copper);
}

.protocol-demo__note {
  margin-top: 18px;
  color: rgba(255, 255, 255, 0.48);
  font-size: 10px;
}

.protocol-section {
  padding-block: clamp(84px, 9vw, 138px);
}

.protocol-purpose {
  border-block: 1px solid var(--protocol-line);
  background: var(--protocol-paper-strong);
}

.protocol-purpose__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(50px, 10vw, 160px);
}

.protocol-purpose h2,
.protocol-section__heading h2,
.protocol-output h2,
.protocol-faq h2,
.protocol-contact h2 {
  margin-top: 20px;
  font-size: clamp(38px, 4.4vw, 64px);
  font-weight: 650;
  letter-spacing: -0.055em;
  line-height: 1.02;
}

.protocol-purpose__copy > p {
  max-width: 600px;
  color: var(--protocol-muted);
  font-size: 20px;
}

.protocol-purpose__copy dl {
  margin-top: 40px;
  border-top: 1px solid var(--protocol-line);
}

.protocol-purpose__copy dl > div {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 22px;
  padding-block: 19px;
  border-bottom: 1px solid var(--protocol-line);
}

.protocol-purpose dt {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.protocol-purpose dd {
  color: var(--protocol-muted);
  font-size: 14px;
}

.protocol-documents {
  background: var(--protocol-ink);
  color: var(--protocol-paper-strong);
}

.protocol-index--light {
  color: #e1a781;
}

.protocol-section__heading {
  display: grid;
  grid-template-columns: 0.72fr 1.5fr 0.78fr;
  align-items: end;
  gap: 44px;
  margin-bottom: 66px;
}

.protocol-section__heading .protocol-index {
  align-self: start;
  margin-top: 12px;
}

.protocol-section__heading h2 {
  margin-top: 0;
}

.protocol-section__heading > p:last-child {
  color: rgba(255, 255, 255, 0.58);
  font-size: 14px;
}

.protocol-document-list {
  border-top: 1px solid var(--protocol-line-dark);
  list-style: none;
}

.protocol-document-list > li {
  display: grid;
  grid-template-columns: 120px 1fr 1.1fr;
  align-items: center;
  gap: 38px;
  padding-block: 31px;
  border-bottom: 1px solid var(--protocol-line-dark);
}

.protocol-document-list__number {
  display: flex;
  align-items: center;
  gap: 16px;
}

.protocol-document-list__number span {
  color: rgba(255, 255, 255, 0.34);
  font-size: 10px;
}

.protocol-document-list__number strong {
  color: var(--protocol-copper);
  font-size: 24px;
  letter-spacing: -0.02em;
}

.protocol-document-list h3 {
  font-size: clamp(22px, 2.1vw, 31px);
  font-weight: 640;
  letter-spacing: -0.035em;
}

.protocol-document-list div > p {
  margin-top: 5px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 13px;
}

.protocol-document-list ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px 20px;
  color: rgba(255, 255, 255, 0.75);
  font-size: 12px;
  list-style: none;
}

.protocol-document-list ul li::before {
  color: var(--protocol-copper);
  content: "·";
  font-size: 18px;
  margin-right: 8px;
}

.protocol-scope {
  background: var(--protocol-paper-strong);
}

.protocol-section__heading--dark > p:last-child {
  color: var(--protocol-muted);
}

.protocol-scope__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-block: 1px solid var(--protocol-line);
}

.protocol-scope article {
  display: flex;
  min-height: 390px;
  flex-direction: column;
  padding: 38px;
  border-right: 1px solid var(--protocol-line);
}

.protocol-scope article:last-child {
  border-right: 0;
}

.protocol-card-index {
  color: var(--protocol-copper-dark);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.protocol-scope h3 {
  margin-top: 48px;
  font-size: 30px;
  font-weight: 650;
  letter-spacing: -0.04em;
  line-height: 1.08;
}

.protocol-scope article > p:not(.protocol-card-index) {
  margin-top: 22px;
  color: var(--protocol-muted);
  font-size: 14px;
}

.protocol-scope article > span {
  margin-top: auto;
  padding-top: 34px;
  color: var(--protocol-ink);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.protocol-output {
  border-block: 1px solid var(--protocol-line);
}

.protocol-output__grid {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: clamp(48px, 9vw, 140px);
}

.protocol-output__copy > p:last-child {
  max-width: 520px;
  margin-top: 26px;
  color: var(--protocol-muted);
  font-size: 17px;
}

.protocol-output__cards {
  border-top: 1px solid var(--protocol-line);
}

.protocol-output__cards article {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 26px;
  padding-block: 34px;
  border-bottom: 1px solid var(--protocol-line);
}

.protocol-output__icon {
  display: grid;
  width: 64px;
  height: 64px;
  place-items: center;
  border: 1px solid var(--protocol-copper);
  color: var(--protocol-copper-dark);
  font-size: 23px;
  font-weight: 750;
}

.protocol-output__cards p {
  color: var(--protocol-copper-dark);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.protocol-output__cards h3 {
  margin-top: 4px;
  font-size: 27px;
  font-weight: 650;
  letter-spacing: -0.035em;
}

.protocol-output__cards div > span {
  display: block;
  margin-top: 10px;
  color: var(--protocol-muted);
  font-size: 14px;
}

.protocol-faq {
  background: var(--protocol-paper-strong);
}

.protocol-faq__grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(50px, 10vw, 160px);
}

.protocol-faq__list {
  border-top: 1px solid var(--protocol-line);
}

.protocol-faq details {
  border-bottom: 1px solid var(--protocol-line);
}

.protocol-faq summary {
  position: relative;
  padding: 25px 44px 25px 0;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  list-style: none;
}

.protocol-faq summary::-webkit-details-marker {
  display: none;
}

.protocol-faq summary::after {
  position: absolute;
  top: 25px;
  right: 6px;
  color: var(--protocol-copper-dark);
  content: "+";
  font-size: 21px;
  font-weight: 400;
}

.protocol-faq details[open] summary::after {
  content: "−";
}

.protocol-faq details p {
  max-width: 650px;
  padding: 0 54px 25px 0;
  color: var(--protocol-muted);
  font-size: 14px;
}

.protocol-contact {
  padding-block: clamp(82px, 9vw, 132px);
  background: var(--protocol-copper-dark);
  color: var(--protocol-paper-strong);
}

.protocol-contact__grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(50px, 10vw, 160px);
}

.protocol-contact h2 {
  max-width: 760px;
}

.protocol-contact__grid > div:last-child > p {
  max-width: 560px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 18px;
}

.protocol-button--light {
  margin-top: 32px;
  border-color: var(--protocol-paper-strong);
  background: var(--protocol-paper-strong);
  color: var(--protocol-ink);
}

.protocol-button--light:hover {
  border-color: var(--protocol-ink);
  background: var(--protocol-ink);
  color: var(--protocol-paper-strong);
}

.protocol-contact__email {
  display: block;
  width: fit-content;
  margin-top: 22px;
  color: rgba(255, 255, 255, 0.84);
  font-size: 14px;
  overflow-wrap: anywhere;
  text-underline-offset: 5px;
}

.protocol-footer {
  padding-block: 42px;
  background: var(--protocol-ink);
  color: rgba(255, 255, 255, 0.62);
}

.protocol-footer__inner {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 42px;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.protocol-footer a {
  width: 142px;
}

@media (max-width: 1000px) {
  :root {
    --protocol-shell: min(100% - 48px, 820px);
  }

  .protocol-header__inner {
    grid-template-columns: 160px minmax(0, 1fr) auto;
  }

  .protocol-header__nav {
    justify-self: center;
    gap: 18px;
  }

  .protocol-header__label {
    display: none;
  }

  .protocol-hero__grid,
  .protocol-purpose__grid,
  .protocol-output__grid,
  .protocol-faq__grid,
  .protocol-contact__grid {
    grid-template-columns: 1fr;
  }

  .protocol-hero__grid {
    gap: 70px;
  }

  .protocol-section__heading {
    grid-template-columns: 1fr 2fr;
  }

  .protocol-section__heading > p:last-child {
    grid-column: 2;
  }

  .protocol-document-list > li {
    grid-template-columns: 92px 1fr;
  }

  .protocol-document-list > li > ul {
    grid-column: 2;
  }

  .protocol-scope__grid {
    grid-template-columns: 1fr;
  }

  .protocol-scope article {
    min-height: 0;
    border-right: 0;
    border-bottom: 1px solid var(--protocol-line);
  }

  .protocol-scope article:last-child {
    border-bottom: 0;
  }

  .protocol-scope article > span {
    margin-top: 42px;
  }
}

@media (max-width: 640px) {
  :root {
    --protocol-shell: calc(100% - 32px);
  }

  .protocol-header__inner {
    min-height: 0;
    grid-template-columns: 124px 1fr;
    gap: 16px;
    padding-block: 14px 16px;
  }

  .protocol-brand {
    width: 122px;
  }

  .protocol-header__cta {
    min-height: 44px;
    justify-self: end;
    grid-column: 2;
    grid-row: 1;
    padding-inline: 14px;
    font-size: 9px;
    letter-spacing: 0.08em;
  }

  .protocol-home-link {
    font-size: 9px;
    letter-spacing: 0.08em;
  }

  .protocol-header__cta span {
    display: none;
  }

  .protocol-header__nav {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-self: start;
    padding-top: 2px;
  }

  .protocol-hero {
    padding-block: 58px 76px;
  }

  .protocol-hero h1 {
    font-size: clamp(43px, 13vw, 58px);
  }

  .protocol-hero__lead {
    font-size: 18px;
  }

  .protocol-hero__actions {
    align-items: stretch;
    flex-direction: column;
  }

  .protocol-button,
  .protocol-text-link {
    width: 100%;
  }

  .protocol-text-link {
    text-align: center;
  }

  .protocol-signals {
    align-items: flex-start;
    flex-direction: column;
  }

  .protocol-demo {
    padding: 20px;
  }

  .protocol-demo::before {
    inset: 12px -8px -12px 10px;
  }

  .protocol-demo__heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 5px;
  }

  .protocol-demo__steps li {
    grid-template-columns: 32px 1fr 28px;
    gap: 10px;
  }

  .protocol-demo__steps strong {
    font-size: 12px;
  }

  .protocol-purpose__copy dl > div {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .protocol-section__heading {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .protocol-section__heading > p:last-child {
    grid-column: auto;
  }

  .protocol-document-list > li {
    grid-template-columns: 1fr;
    gap: 18px;
    padding-block: 28px;
  }

  .protocol-document-list > li > ul {
    grid-column: auto;
    grid-template-columns: 1fr;
  }

  .protocol-scope article {
    padding: 28px 0;
  }

  .protocol-scope h3 {
    margin-top: 28px;
  }

  .protocol-output__cards article {
    grid-template-columns: 52px 1fr;
    gap: 18px;
  }

  .protocol-output__icon {
    width: 48px;
    height: 48px;
    font-size: 18px;
  }

  .protocol-footer__inner {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

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

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

@media print {
  .protocol-header__cta,
  .protocol-hero__actions,
  .protocol-contact {
    display: none;
  }
}