:root {
  color-scheme: dark;

  /* Color tokens */
  --color-bg: #000000;
  --color-text: #ffffff;
  --color-muted: #9a9a9a;
  --color-faint: #5f5f5f;
  --color-line: rgba(255, 255, 255, 0.18);
  --color-line-strong: rgba(255, 255, 255, 0.52);
  --color-surface: rgba(255, 255, 255, 0.045);
  --color-header: rgba(0, 0, 0, 0.9);

  /* Typography tokens */
  --font-display: "Druk Wide", "Compacta", "DIN Condensed", "Bahnschrift Condensed", Impact, "Arial Narrow", sans-serif;
  --font-body: "Berkeley Mono", "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  --font-size-label: 0.68rem;
  --font-size-nav: 0.72rem;
  --font-size-nav-mobile: 0.68rem;
  --font-size-nav-tiny: 0.62rem;
  --font-size-brand: 0.78rem;
  --font-size-brand-mobile: 0.95rem;
  --font-size-brand-tiny: 0.86rem;
  --font-size-button: 0.7rem;
  --font-size-small: 0.8rem;
  --font-size-body: 0.9rem;
  --font-size-principle: 0.86rem;
  --font-size-lead: 1rem;
  --font-size-h3: 1rem;
  --font-size-h2: clamp(1.55rem, 2.6vw, 2.7rem);
  --font-size-h1: clamp(2.7rem, 5.2vw, 5.15rem);
  --line-height-tight: 0.9;
  --line-height-heading: 0.98;
  --line-height-body: 1.75;
  --tracking-label: 0.16em;
  --tracking-nav: 0.1em;
  --tracking-heading-lg: -0.055em;
  --tracking-heading-md: -0.04em;
  --tracking-heading-sm: -0.01em;

  /* Layout tokens */
  --container: min(1240px, calc(100% - 48px));
  --container-mobile: min(100% - 28px, 1240px);
  --rail-width: 260px;
  --content-gap: 60px;
  --section-gap: 36px;
  --label-column: 160px;
  --section-y: 64px;
  --section-y-mobile: 62px;
  --page-top: 112px;
  --header-top: 16px;

  /* Spacing tokens */
  --space-1: 8px;
  --space-2: 10px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 18px;
  --space-6: 20px;
  --space-7: 22px;
  --space-8: 24px;
  --space-9: 26px;
  --space-10: 28px;
  --space-11: 34px;
  --space-12: 40px;
  --space-13: 48px;
  --space-14: 54px;
  --space-15: 56px;
  --space-16: 70px;
  --space-17: 76px;

  /* Component tokens */
  --button-height: 44px;
  --button-x: 15px;
  --icon-button-size: 34px;
  --mark-sm: 24px;
  --mark-lg: 76px;
  --border: 1px solid var(--color-line);
  --border-strong: 1px solid var(--color-line-strong);
  --motion-fast: 160ms ease;
  --motion-reveal: 520ms ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--color-text);
  background: var(--color-bg);
  font-family: var(--font-body);
  overflow-x: hidden;
}

body::before {
  position: fixed;
  inset: var(--space-3);
  z-index: -1;
  content: "";
  border: 1px solid rgba(255, 255, 255, 0.07);
  pointer-events: none;
}

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

.text-link {
  color: var(--color-text);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

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

h1,
h2,
h3 {
  color: var(--color-text);
  font-family: var(--font-display);
  font-weight: 900;
  text-transform: uppercase;
}

h1 {
  max-width: 760px;
  margin-bottom: var(--space-8);
  font-size: var(--font-size-h1);
  line-height: var(--line-height-tight);
  letter-spacing: var(--tracking-heading-lg);
}

h2 {
  max-width: 650px;
  margin-bottom: var(--space-5);
  font-size: var(--font-size-h2);
  line-height: var(--line-height-heading);
  letter-spacing: var(--tracking-heading-md);
}

h3 {
  margin-bottom: 0;
  font-size: var(--font-size-h3);
  line-height: 1;
  letter-spacing: var(--tracking-heading-sm);
}

p {
  color: var(--color-muted);
  line-height: var(--line-height-body);
}

.site-header {
  position: fixed;
  top: 0;
  left: 50%;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: var(--container);
  margin-top: var(--header-top);
  padding: var(--space-3) 0;
  border-bottom: 1px solid transparent;
  transform: translateX(-50%);
  transition: background var(--motion-fast), border-color var(--motion-fast), padding var(--motion-fast);
}

.site-header.is-scrolled {
  padding: var(--space-3) var(--space-4);
  border-color: var(--color-line);
  background: var(--color-header);
  backdrop-filter: blur(14px);
}

.brand,
.nav {
  display: flex;
  align-items: center;
}

.brand {
  gap: var(--space-2);
  font-size: var(--font-size-brand);
  font-weight: 700;
  letter-spacing: var(--tracking-nav);
  text-transform: uppercase;
}

.brand-mark,
.rail-mark {
  flex: 0 0 auto;
  width: var(--mark-sm);
  height: var(--mark-sm);
  display: block;
  object-fit: contain;
}

.nav {
  gap: var(--space-7);
}

.menu-toggle {
  display: none;
}

.nav a {
  color: var(--color-muted);
  font-size: var(--font-size-nav);
  font-weight: 600;
  letter-spacing: var(--tracking-nav);
  text-transform: uppercase;
  transition: color var(--motion-fast);
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--color-text);
}

.page {
  display: grid;
  grid-template-columns: var(--rail-width) minmax(0, 1fr);
  gap: var(--content-gap);
  width: var(--container);
  margin: 0 auto;
  padding: var(--page-top) 0 var(--space-12);
}

.identity-rail {
  position: sticky;
  top: var(--page-top);
  align-self: start;
  min-height: calc(100vh - 144px);
  padding: 0 0 var(--space-8);
  border-right: var(--border);
}

.rail-mark {
  width: var(--mark-lg);
  height: var(--mark-lg);
  margin-bottom: var(--space-13);
}

.identity-rail dl {
  display: grid;
  gap: var(--space-8);
  width: min(190px, 100%);
  margin: 0;
}

.identity-rail dt,
.section-label,
.kicker,
.service span {
  color: var(--color-text);
  font-size: var(--font-size-label);
  font-weight: 700;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
}

.identity-rail dd {
  margin: var(--space-1) 0 0;
  color: var(--color-muted);
  font-size: var(--font-size-small);
  line-height: 1.6;
}

.focus-list {
  display: grid;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
  list-style: none;
}

.focus-list li {
  position: relative;
  padding-left: var(--space-4);
}

.focus-list li::before {
  position: absolute;
  top: 0.75em;
  left: 0;
  width: 6px;
  height: 1px;
  content: "";
  background: var(--color-text);
}

.content {
  min-width: 0;
}

.hero {
  display: grid;
  align-content: end;
  min-height: clamp(520px, 72vh, 680px);
  padding-bottom: var(--space-12);
  border-bottom: var(--border);
}

.kicker,
.section-label {
  margin: 0 0 var(--space-5);
}

.lead {
  max-width: 610px;
  margin-bottom: 0;
  font-size: var(--font-size-lead);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-11);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--button-height);
  padding: 0 var(--button-x);
  border: var(--border);
  color: var(--color-text);
  font-size: var(--font-size-button);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: border-color var(--motion-fast), background var(--motion-fast), color var(--motion-fast);
}

.button:hover,
.button:focus-visible {
  border-color: var(--color-line-strong);
}

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

.button.secondary {
  background: transparent;
}

.statement,
.work,
.principles,
.signals,
.contact {
  padding: var(--section-y) 0;
  border-bottom: var(--border);
}

.statement,
.section-head,
.contact {
  display: grid;
  grid-template-columns: var(--label-column) minmax(0, 1fr);
  gap: var(--section-gap);
}

.statement {
  grid-template-columns: var(--label-column) minmax(0, 1fr);
}

.statement p:not(.section-label) {
  grid-column: 2;
  max-width: 860px;
  margin-bottom: 0;
}

.section-head {
  align-items: end;
  margin-bottom: var(--space-8);
}

.section-head h2 {
  margin-bottom: 0;
}

.service-list {
  border-top: var(--border);
}

.service {
  display: grid;
  grid-template-columns: 72px minmax(150px, 0.35fr) minmax(0, 1fr);
  gap: var(--space-8);
  align-items: baseline;
  padding: var(--space-7) 0;
  border-bottom: var(--border);
}

.service span {
  color: var(--color-faint);
}

.service p {
  max-width: 560px;
  margin-bottom: 0;
  font-size: var(--font-size-body);
}

.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: var(--border);
  border-left: var(--border);
}

.principle {
  min-height: 190px;
  padding: var(--space-6);
  border-right: var(--border);
  border-bottom: var(--border);
  background: var(--color-surface);
}

.principle h3 {
  margin-bottom: var(--space-10);
}

.principle p {
  margin-bottom: 0;
  font-size: var(--font-size-principle);
}

.contact {
  margin-bottom: 0;
}

.contact h2 {
  max-width: 690px;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
  margin-top: var(--space-6);
}

.contact-link {
  display: inline-block;
  padding-bottom: 7px;
  border-bottom: 1px solid var(--color-text);
  color: var(--color-text);
  font-size: var(--font-size-body);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.copy-button {
  position: relative;
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
  width: var(--icon-button-size);
  height: var(--icon-button-size);
  padding: 0;
  border: var(--border);
  color: var(--color-text);
  background: transparent;
  cursor: pointer;
  transition: border-color var(--motion-fast), background var(--motion-fast), color var(--motion-fast);
}

.copy-button:hover,
.copy-button:focus-visible {
  border-color: var(--color-line-strong);
}

.copy-button.is-copied {
  background: var(--color-text);
  color: var(--color-bg);
}

.copy-icon,
.copy-icon::before {
  display: block;
  width: 12px;
  height: 14px;
  border: 1px solid currentColor;
}

.copy-icon {
  position: relative;
  transform: translate(2px, 1px);
}

.copy-icon::before {
  position: absolute;
  top: -5px;
  left: -5px;
  content: "";
  background: var(--color-bg);
}

.copy-button.is-copied .copy-icon::before {
  background: var(--color-text);
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--motion-reveal), transform var(--motion-reveal);
}

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

@media (max-width: 980px) {
  :root {
    --content-gap: 0;
    --section-gap: var(--space-3);
  }

  .page {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .identity-rail {
    position: static;
    min-height: 0;
    padding: 0 0 var(--space-11);
    border-right: 0;
    border-bottom: var(--border);
  }

  .rail-mark {
    width: 52px;
    height: 52px;
    margin-bottom: var(--space-10);
  }

  .identity-rail dl {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
  }

  .hero {
    min-height: auto;
    padding: var(--space-14) 0 var(--space-12);
  }

  .statement,
  .section-head,
  .contact {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  .statement p:not(.section-label) {
    grid-column: auto;
    max-width: 100%;
  }

  .service {
    grid-template-columns: 52px 1fr;
  }

  .service p {
    grid-column: 2;
  }

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

@media (max-width: 640px) {
  :root {
    --container-mobile: min(100% - 24px, 1240px);
    --font-size-h1: clamp(2.25rem, 12vw, 3.35rem);
    --font-size-h2: clamp(1.45rem, 8vw, 2.15rem);
    --font-size-lead: 0.95rem;
    --line-height-tight: 0.94;
    --section-y-mobile: 30px;
  }

  body::before {
    display: none;
  }

  .site-header,
  .page {
    width: var(--container-mobile);
  }

  .site-header {
    position: absolute;
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr) 44px;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-3);
    padding-bottom: var(--space-3);
    border-bottom-color: var(--color-line);
  }

  .brand {
    grid-column: 2;
    justify-content: center;
    justify-self: center;
    min-width: 0;
    font-size: var(--font-size-brand-mobile);
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }

  .menu-toggle {
    position: relative;
    grid-column: 3;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    justify-self: end;
    width: 44px;
    height: 44px;
    padding: 0;
    border: var(--border);
    color: var(--color-text);
    background: transparent;
    cursor: pointer;
  }

  .menu-toggle span:first-child {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
  }

  .menu-icon,
  .menu-icon::before,
  .menu-icon::after {
    display: block;
    width: 18px;
    height: 1px;
    background: var(--color-text);
    transition: transform var(--motion-fast), opacity var(--motion-fast);
  }

  .menu-icon {
    position: relative;
  }

  .menu-icon::before,
  .menu-icon::after {
    position: absolute;
    left: 0;
    content: "";
  }

  .menu-icon::before {
    transform: translateY(-6px);
  }

  .menu-icon::after {
    transform: translateY(6px);
  }

  .site-header.is-menu-open .menu-icon {
    background: transparent;
  }

  .site-header.is-menu-open .menu-icon::before {
    transform: rotate(45deg);
  }

  .site-header.is-menu-open .menu-icon::after {
    transform: rotate(-45deg);
  }

  .nav {
    grid-column: 1 / -1;
    display: none;
    width: 100%;
    justify-content: center;
    gap: var(--space-2);
    padding-top: var(--space-3);
    border-top: var(--border);
  }

  .site-header.is-menu-open .nav {
    display: flex;
  }

  .nav a {
    font-size: var(--font-size-nav-mobile);
    letter-spacing: 0.08em;
  }

  .page {
    padding-top: 112px;
    padding-bottom: var(--space-6);
  }

  .identity-rail {
    display: none;
  }

  .hero {
    padding-top: var(--space-8);
    padding-bottom: var(--space-8);
  }

  .section-head {
    margin-bottom: var(--space-5);
  }

  .lead,
  .statement p:not(.section-label),
  .service p,
  .principle p {
    max-width: 100%;
  }

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

  .button {
    min-height: 46px;
    text-align: center;
  }

  .service {
    grid-template-columns: 1fr;
    gap: var(--space-1);
    padding: var(--space-4) 0;
  }

  .service p {
    grid-column: auto;
  }

  .principle {
    min-height: 0;
    padding: var(--space-4);
  }

  .principle h3 {
    margin-bottom: var(--space-4);
  }

  .contact-link {
    max-width: 100%;
    overflow-wrap: anywhere;
  }

  .contact-actions {
    width: 100%;
  }

  .statement,
  .work,
  .principles,
  .signals,
  .contact {
    padding: var(--section-y-mobile) 0;
  }
}

@media (max-width: 380px) {
  :root {
    --font-size-h1: clamp(2rem, 11vw, 2.8rem);
    --font-size-h2: clamp(1.3rem, 7vw, 1.9rem);
  }

  .brand {
    font-size: var(--font-size-brand-tiny);
  }

  .nav a {
    font-size: var(--font-size-nav-tiny);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

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