:root {
  --color-bg: #f7f8f6;
  --color-surface: #ffffff;
  --color-surface-muted: #e9ecee;
  --color-surface-strong: #eef3f1;
  --color-text: #1b2326;
  --color-text-muted: #556167;
  --color-text-soft: #6b767b;
  --color-border: #d7dddf;
  --color-border-strong: #b9c3c7;
  --color-petrol: #0f3f46;
  --color-petrol-soft: #1a6074;
  --color-gold: #cda255;
  --color-focus: #1a6074;
  --shadow-soft: 0 18px 40px rgba(15, 63, 70, 0.08);
  --shadow-panel: 0 12px 28px rgba(27, 35, 38, 0.08);
  --radius-sm: 0.625rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --content-width: 74rem;
  --content-narrow: 58rem;
  --space-2xs: 0.375rem;
  --space-xs: 0.75rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4.5rem;
  --space-3xl: 6rem;
  --font-sans: "IBM Plex Sans", "Aptos", "Segoe UI", sans-serif;
  --line-body: 1.65;
  --line-heading: 1.18;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: var(--line-body);
  text-rendering: optimizeLegibility;
}

body[data-menu-open="true"] {
  overflow: hidden;
}

main {
  display: block;
}

:where(section, main, article)[id] {
  scroll-margin-top: 6.5rem;
}

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

a {
  color: var(--color-petrol);
  text-decoration-thickness: 0.09em;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--color-petrol-soft);
}

button,
input,
textarea,
select {
  font: inherit;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: var(--space-sm);
  top: var(--space-sm);
  z-index: 20;
  transform: translateY(-220%);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--color-petrol);
  color: #fff;
  text-decoration: none;
}

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

.site-shell {
  width: min(calc(100% - 2rem), var(--content-width));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(185, 195, 199, 0.7);
  background: rgba(247, 248, 246, 0.94);
  backdrop-filter: blur(10px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  min-height: 5rem;
  padding: 1rem 0;
}

.wordmark {
  display: inline-flex;
  align-items: baseline;
  gap: 0.08em;
  color: var(--color-text);
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-decoration: none;
}

.wordmark__accent {
  color: var(--color-petrol);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--color-border-strong);
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-text);
}

.nav-toggle__icon,
.nav-toggle__icon::before,
.nav-toggle__icon::after {
  width: 1rem;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  transition: transform 160ms ease, opacity 160ms ease;
  content: "";
  display: block;
}

.nav-toggle__icon {
  position: relative;
}

.nav-toggle__icon::before,
.nav-toggle__icon::after {
  position: absolute;
  left: 0;
}

.nav-toggle__icon::before {
  top: -0.35rem;
}

.nav-toggle__icon::after {
  top: 0.35rem;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon::before {
  transform: translateY(0.35rem) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon::after {
  transform: translateY(-0.35rem) rotate(-45deg);
}

.site-header__panel {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.4rem;
}

.site-nav a {
  position: relative;
  color: var(--color-text);
  font-size: 0.96rem;
  font-weight: 500;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--color-petrol);
}

.site-nav a[aria-current="page"]::after {
  position: absolute;
  right: 0;
  bottom: -0.45rem;
  left: 0;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  content: "";
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem 1rem;
  align-items: center;
}

.button,
.link-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  min-height: 3rem;
  padding: 0.85rem 1.15rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.button:hover,
.link-button:hover {
  transform: translateY(-1px);
}

.button--primary {
  background: var(--color-petrol);
  color: #fff;
}

.button--primary:hover {
  background: var(--color-petrol-soft);
  color: #fff;
}

.button--secondary {
  border-color: var(--color-border-strong);
  background: transparent;
  color: var(--color-petrol);
}

.button--secondary:hover {
  border-color: var(--color-petrol-soft);
  background: rgba(26, 96, 116, 0.06);
  color: var(--color-petrol-soft);
}

.text-link,
.link-button {
  padding: 0;
  min-height: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--color-petrol);
  font-weight: 600;
  cursor: pointer;
}

.text-link:hover,
.link-button:hover {
  color: var(--color-petrol-soft);
}

.text-link__arrow,
.button__arrow,
.link-button__arrow {
  font-size: 1.05em;
}

.section {
  padding: var(--space-2xl) 0;
}

.section--soft {
  background: linear-gradient(180deg, rgba(233, 236, 238, 0.48), rgba(233, 236, 238, 0.72));
}

.section--tight {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xl);
}

.section__intro {
  max-width: 44rem;
  margin-bottom: var(--space-xl);
}

.eyebrow {
  margin: 0 0 var(--space-xs);
  color: var(--color-petrol);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--color-text);
  line-height: var(--line-heading);
}

h1 {
  font-size: clamp(2.55rem, 4vw, 3.45rem);
  letter-spacing: -0.035em;
}

h2 {
  font-size: clamp(2rem, 2.6vw, 2.5rem);
  letter-spacing: -0.03em;
}

h3 {
  font-size: clamp(1.28rem, 1.5vw, 1.48rem);
  letter-spacing: -0.02em;
}

h4 {
  font-size: 1rem;
  font-weight: 700;
}

p {
  margin: 0;
}

.lead {
  font-size: clamp(1.08rem, 1.45vw, 1.15rem);
  color: var(--color-text-muted);
}

.hero {
  padding: clamp(2rem, 4vw, 3.5rem) 0 var(--space-2xl);
}

.about-hero {
  padding-top: clamp(2.5rem, 5vw, 4.5rem);
}

.about-hero__content {
  max-width: 50rem;
  display: grid;
  gap: var(--space-md);
}

.about-hero__slogan {
  color: var(--color-text);
}

.selected-work-hero {
  padding-top: clamp(2.5rem, 5vw, 4.5rem);
}

.selected-work-hero__content {
  max-width: 52rem;
  display: grid;
  gap: var(--space-md);
}

.selected-work-note {
  max-width: 48rem;
  padding-left: 1rem;
  border-left: 3px solid rgba(15, 63, 70, 0.28);
  color: var(--color-text-muted);
}

.contact-hero {
  padding-top: clamp(2.5rem, 5vw, 4.5rem);
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 24rem);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

.contact-layout__intro {
  max-width: 44rem;
}

.contact-card {
  display: grid;
  gap: var(--space-lg);
  padding: clamp(1.35rem, 2vw, 1.75rem);
  border: 1px solid rgba(215, 221, 223, 0.92);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow-panel);
}

.contact-card__section {
  display: grid;
  gap: 0.7rem;
}

.contact-details {
  display: grid;
  gap: 0.85rem;
  margin: 0;
}

.contact-details__row {
  display: grid;
  gap: 0.2rem;
}

.contact-details__row dt {
  color: var(--color-text-muted);
  font-weight: 600;
}

.contact-details__row dd {
  margin: 0;
}

.contact-details__row a {
  overflow-wrap: anywhere;
  word-break: break-word;
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(17rem, 0.82fr);
  align-items: center;
  gap: clamp(1.5rem, 4vw, 4rem);
}

.hero__content {
  display: grid;
  gap: var(--space-md);
}

.hero__highlight {
  color: var(--color-text);
  font-weight: 600;
}

.hero__slogan {
  color: var(--color-text-soft);
  font-size: 0.98rem;
  font-weight: 500;
}

.hero__graphic-frame {
  position: relative;
  min-height: 22rem;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.systems-graphic {
  width: 100%;
  height: auto;
  color: var(--color-petrol-soft);
}

.systems-graphic__dot {
  fill: rgba(85, 97, 103, 0.44);
}

.systems-graphic__lines {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2.6;
}

.systems-graphic__lines--soft {
  stroke: rgba(188, 197, 203, 0.92);
}

.systems-graphic__lines--accent {
  stroke: var(--color-petrol-soft);
}

.systems-graphic__node {
  stroke-width: 2;
}

.systems-graphic__node--white,
.systems-graphic__node--white-dot {
  fill: #ffffff;
  stroke: rgba(145, 164, 178, 0.9);
}

.systems-graphic__node--ring {
  fill: #ffffff;
  stroke: rgba(145, 164, 178, 0.92);
}

.systems-graphic__node--ring-dark {
  fill: #ffffff;
  stroke: rgba(27, 35, 38, 0.92);
}

.systems-graphic__node--gold-ring {
  fill: #ffffff;
  stroke: var(--color-gold);
  stroke-width: 4;
}

.systems-graphic__node--soft-ring {
  fill: #ffffff;
  stroke: rgba(173, 184, 191, 0.94);
  stroke-width: 2.4;
}

.systems-graphic__node--petrol,
.systems-graphic__node--petrol-core {
  fill: var(--color-petrol-soft);
  stroke: #f7f8f6;
  stroke-width: 2.2;
}

.section-header {
  max-width: var(--content-narrow);
  display: grid;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}

.section-header--flush {
  margin-bottom: 0;
}

.section-header--spaced {
  margin-top: 2rem;
  margin-bottom: 0;
}

.editorial-stack {
  max-width: 52rem;
  display: grid;
  gap: var(--space-md);
}

.editorial-emphasis {
  padding: 0.15rem 0 0.15rem 1rem;
  border-left: 3px solid var(--color-petrol);
  color: var(--color-text);
  font-size: clamp(1.12rem, 1.6vw, 1.28rem);
  line-height: 1.45;
}

.about-principles-section {
  background:
    radial-gradient(circle at top right, rgba(205, 162, 85, 0.09), transparent 24rem),
    linear-gradient(180deg, rgba(233, 236, 238, 0.3), rgba(247, 248, 246, 0));
}

.about-principles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-md);
}

.principle-panel {
  padding: clamp(1.4rem, 2vw, 1.8rem);
  border: 1px solid rgba(215, 221, 223, 0.92);
  border-top-width: 4px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow-panel);
}

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

.principle-panel__body {
  display: grid;
  gap: var(--space-sm);
}

.principle-panel--petrol {
  border-top-color: var(--color-petrol);
}

.principle-panel--neutral {
  border-top-color: var(--color-text);
}

.principle-panel--gold {
  border-top-color: var(--color-gold);
}

.expectations-list {
  display: grid;
  gap: var(--space-md);
}

.expectation-item {
  display: grid;
  grid-template-columns: minmax(0, 15rem) minmax(0, 1fr);
  gap: var(--space-md);
  align-items: start;
  padding: 1.35rem;
  border: 1px solid rgba(215, 221, 223, 0.92);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.9);
}

.expectation-item__body {
  display: grid;
  gap: 0.7rem;
}

.selected-work-list {
  display: grid;
  gap: var(--space-lg);
}

.selected-case {
  padding: clamp(1.4rem, 2vw, 1.85rem);
  border-top: 1px solid rgba(185, 195, 199, 0.78);
}

.selected-case:first-child {
  border-top: 0;
  padding-top: 0;
}

.selected-case__header {
  max-width: 44rem;
  display: grid;
  gap: 0.55rem;
  margin-bottom: var(--space-md);
}

.selected-case__when {
  color: var(--color-petrol);
  font-weight: 600;
}

.selected-case__body {
  max-width: 52rem;
  display: grid;
  gap: var(--space-md);
}

.selected-case__summary {
  display: grid;
  gap: 0.7rem;
  margin-top: 0.25rem;
  padding: 1rem 1.15rem;
  border-left: 3px solid rgba(15, 63, 70, 0.72);
  background: rgba(255, 255, 255, 0.74);
}

.problem-grid,
.service-grid,
.principle-grid,
.step-grid {
  display: grid;
  gap: var(--space-md);
}

.problem-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.service-grid,
.principle-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.principle-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.step-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.panel,
.case-study,
.step-card,
.service-card,
.problem-card,
.principle-card {
  height: 100%;
  border: 1px solid rgba(215, 221, 223, 0.92);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.problem-card,
.service-card,
.principle-card {
  padding: 1.35rem;
}

.problem-card {
  display: grid;
  gap: 0.85rem;
  text-align: left;
}

.service-card,
.principle-card {
  display: grid;
  gap: 0.85rem;
  box-shadow: var(--shadow-panel);
}

.service-card__lead {
  font-weight: 700;
}

.icon-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.9rem;
  height: 2.9rem;
  border-radius: 0.95rem;
  background: rgba(15, 63, 70, 0.07);
  color: var(--color-petrol);
}

.icon-badge svg {
  width: 1.45rem;
  height: 1.45rem;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.approach {
  background:
    radial-gradient(circle at top right, rgba(205, 162, 85, 0.08), transparent 24rem),
    linear-gradient(180deg, rgba(233, 236, 238, 0.42), rgba(247, 248, 246, 0));
}

.step-card {
  padding: 1.5rem;
  box-shadow: var(--shadow-panel);
}

.step-card__number {
  margin-bottom: var(--space-sm);
  color: var(--color-petrol);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.case-study-stack {
  display: grid;
  gap: var(--space-md);
}

.case-study {
  padding: clamp(1.5rem, 2vw, 2rem);
  background: linear-gradient(45deg, rgba(255, 255, 255, 0.98), rgba(238, 243, 241, 0.42));
}

.case-study__body {
  display: grid;
  gap: var(--space-md);
}

.outcome {
  padding-top: var(--space-sm);
  border-top: 1px solid rgba(185, 195, 199, 0.78);
  color: var(--color-text-muted);
  font-size: 0.98rem;
}

.principle-card {
  background: rgba(255, 255, 255, 0.88);
}

.cta-panel {
  padding: clamp(1.7rem, 2.5vw, 2.4rem);
  border: 1px solid rgba(215, 221, 223, 0.92);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(238, 243, 241, 0.72));
  box-shadow: var(--shadow-soft);
}

.cta-panel__content {
  max-width: 44rem;
  display: grid;
  gap: var(--space-md);
}

.cta-panel__email {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--color-text);
  font-weight: 600;
  text-decoration: none;
}

.cta-panel__email:hover {
  color: var(--color-petrol);
}

.site-footer {
  border-top: 1px solid rgba(185, 195, 199, 0.78);
  background: rgba(255, 255, 255, 0.76);
}

.site-footer__inner {
  display: flex;
  justify-content: center;
  padding: var(--space-lg) 0 var(--space-xl);
}

.site-footer__copy {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  color: var(--color-text-soft);
  font-size: 0.95rem;
  text-align: center;
}

.site-footer__copy a {
  color: var(--color-petrol);
  text-decoration: none;
}

.site-footer__copy a:hover,
.site-footer__copy a[aria-current="page"] {
  color: var(--color-petrol-soft);
}

.legal-page {
  padding-top: clamp(2.5rem, 5vw, 4.5rem);
}

.legal-page__content {
  max-width: 44rem;
  margin: 0 auto;
}

.legal-page__meta {
  margin-top: var(--space-sm);
  color: var(--color-text-muted);
  font-weight: 600;
}

.legal-page__body {
  display: grid;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.legal-page__body section {
  display: grid;
  gap: var(--space-sm);
}

.legal-page__body h2 {
  font-size: clamp(1.35rem, 2vw, 1.6rem);
}

.legal-contact {
  font-style: normal;
  display: grid;
  gap: 0.35rem;
}

@media (max-width: 70rem) {
  .problem-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .about-principles,
  .service-grid,
  .principle-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .step-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 56rem) {
  .site-header__inner {
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .site-header__panel {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    padding-bottom: 0.25rem;
  }

  .site-header__panel[data-open="true"] {
    display: flex;
  }

  .site-nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
    padding-top: var(--space-xs);
  }

  .site-nav a[aria-current="page"]::after {
    bottom: -0.25rem;
  }

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

  .contact-layout,
  .about-principles,
  .expectation-item {
    grid-template-columns: 1fr;
  }

  .hero__graphic-frame {
    min-height: 17rem;
    order: -1;
  }

  .problem-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 40rem) {
  body {
    font-size: 0.98rem;
  }

  .site-shell {
    width: min(calc(100% - 1.25rem), var(--content-width));
  }

  .section {
    padding: var(--space-xl) 0;
  }

  .problem-grid,
  .about-principles,
  .service-grid,
  .principle-grid,
  .step-grid {
    grid-template-columns: 1fr;
  }

  .button-row {
    align-items: stretch;
  }

  .button-row .button {
    width: 100%;
  }

  .hero__graphic-frame {
    min-height: 14rem;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0s !important;
    transition-duration: 0s !important;
  }
}