/* ───────────────────────────────────────────
   Variables
   ─────────────────────────────────────────── */

:root {
  --background: oklch(0.99 0 0);
  --foreground: oklch(0.18 0 0);
  --muted-foreground: oklch(0.45 0 0);
  --border: oklch(0.85 0 0);
  --accent: oklch(0.18 0 0);
  --font-sans: "Montserrat", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --content-max: 68rem;
  --gutter: 1.5rem;
  --gutter-md: 3rem;
  --gutter-lg: 4.5rem;
  --section-y: 5rem;
  --section-y-md: 8rem;
  --section-y-lg: 10rem;
  --header-h: 3.5rem;
  --border-30: color-mix(in oklab, var(--border) 30%, transparent);
  --border-40: color-mix(in oklab, var(--border) 40%, transparent);
  --accent-60: color-mix(in oklab, var(--accent) 60%, transparent);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 160ms;
  --duration-base: 240ms;
  --duration-slow: 720ms;
}

@supports not (color: color-mix(in oklab, white 50%, transparent)) {
  :root {
    --border-30: rgba(0, 0, 0, 0.08);
    --border-40: rgba(0, 0, 0, 0.12);
    --accent-60: rgba(0, 0, 0, 0.6);
  }
}

/* ───────────────────────────────────────────
   Reset & base
   ─────────────────────────────────────────── */

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

html {
  overflow-x: hidden;
  max-width: 100vw;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1.5rem);
  scrollbar-width: thin;
  scrollbar-color: hsl(0, 0%, 70%) hsl(0, 0%, 96%);
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--background);
  color: var(--foreground);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

html::-webkit-scrollbar {
  width: 10px;
}

html::-webkit-scrollbar-track {
  background: hsl(0, 0%, 96%);
}

html::-webkit-scrollbar-thumb {
  background: hsl(0, 0%, 70%);
}

html::-webkit-scrollbar-thumb:hover {
  background: hsl(0, 0%, 55%);
}

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

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

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

h1,
h2,
h3,
h4,
h5,
h6,
p {
  margin: 0;
}

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

button {
  background: none;
  border: 0;
  color: inherit;
  font: inherit;
  padding: 0;
  cursor: pointer;
}

::selection {
  background: var(--accent);
  color: var(--background);
}

/* ───────────────────────────────────────────
   Motion
   ─────────────────────────────────────────── */

.motion-ready .scroll-reveal {
  opacity: 0;
  transform: translate3d(0, 14px, 0);
  transition:
    opacity var(--duration-slow) var(--ease-out),
    transform var(--duration-slow) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}

.motion-ready .scroll-reveal.is-visible {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

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

  .nav-toggle-line,
  .btn,
  .scroll-reveal,
  .back-to-top,
  .site-header,
  .nav-overlay,
  .nav-links a,
  .contact-email,
  .colophon-link,
  .pillar-card::after,
  .process-row::after,
  .principle::before {
    transition: none;
  }
}

/* ───────────────────────────────────────────
   Skip link
   ─────────────────────────────────────────── */

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  padding: 0.5rem 1rem;
  background: var(--foreground);
  color: var(--background);
  font-family: var(--font-sans);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  z-index: 200;
}

.skip-link:focus {
  top: 0.75rem;
}

/* ───────────────────────────────────────────
   Site header & navigation
   ─────────────────────────────────────────── */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  border-bottom: 1px solid transparent;
  transition:
    background var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out);
}

.site-header.is-scrolled {
  background: rgba(255, 249, 249, 0.92);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom-color: var(--border-30);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--content-max);
  margin: 0 auto;
  height: 100%;
  padding: 0 var(--gutter);
}

.site-nav-main {
  justify-content: flex-end;
}

@media (min-width: 768px) {
  .site-nav-main {
    justify-content: center;
  }

  .site-nav {
    padding: 0 var(--gutter-md);
  }
}

@media (min-width: 1024px) {
  .site-nav {
    padding: 0 var(--gutter-lg);
  }
}

.nav-logo {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--foreground);
}

.nav-links {
  display: none;
  gap: 2.5rem;
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
}

.nav-links a {
  font-family: var(--font-sans);
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted-foreground);
  transition: color var(--duration-fast) var(--ease-out);
}

.nav-links a.is-active {
  color: var(--foreground);
}

@media (hover: hover) and (pointer: fine) {
  .nav-links a:hover {
    color: var(--foreground);
  }
}

/* Hamburger */

.nav-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  height: 28px;
  justify-content: center;
  align-items: center;
}

@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }
}

.nav-toggle-line {
  display: block;
  width: 18px;
  height: 1px;
  background: var(--foreground);
  transform-origin: center;
  transition: transform var(--duration-base) var(--ease-out);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:first-child {
  transform: translateY(3px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:last-child {
  transform: translateY(-3px) rotate(-45deg);
}

/* Mobile overlay */

.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 99;
  background: var(--background);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-base) var(--ease-out);
}

.nav-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

.nav-overlay-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.5rem;
}

.nav-overlay-links a {
  font-family: var(--font-sans);
  font-size: clamp(1.25rem, 4vw, 1.75rem);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--foreground);
  font-weight: 400;
}

/* ───────────────────────────────────────────
   Grid background
   ─────────────────────────────────────────── */

.grid-bg {
  position: fixed;
  inset: 0;
  opacity: 0.08;
  pointer-events: none;
  background-image: linear-gradient(to right, oklch(0.9 0 0) 1px, transparent 1px),
    linear-gradient(to bottom, oklch(0.9 0 0) 1px, transparent 1px);
  background-position: 0 var(--grid-y, 0);
  background-size: 80px 80px;
  z-index: 0;
}

/* ───────────────────────────────────────────
   Page & section layout
   ─────────────────────────────────────────── */

.page {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
}

.page-content {
  position: relative;
  z-index: 1;
}

.section {
  position: relative;
  padding: var(--section-y) var(--gutter);
}

@media (min-width: 768px) {
  .section {
    padding: var(--section-y-md) var(--gutter-md);
  }
}

@media (min-width: 1024px) {
  .section {
    padding: var(--section-y-lg) var(--gutter-lg);
  }
}

.section-inner {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
}

.section-header {
  margin-bottom: 3.5rem;
}

@media (min-width: 768px) {
  .section-header {
    margin-bottom: 4.5rem;
  }
}

.eyebrow {
  font-family: var(--font-sans);
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--muted-foreground);
  font-weight: 400;
}

/* ───────────────────────────────────────────
   Hero
   ─────────────────────────────────────────── */

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: clamp(3rem, 10vh, 6rem) var(--gutter);
  overflow: hidden;
}

@media (min-width: 768px) {
  .hero {
    padding-left: var(--gutter-md);
    padding-right: var(--gutter-md);
  }
}

@media (min-width: 1024px) {
  .hero {
    padding-left: var(--gutter-lg);
    padding-right: var(--gutter-lg);
  }
}

.hero-inner {
  position: relative;
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  flex: 1;
}

.hero-content {
  width: 100%;
  max-width: 52rem;
  position: relative;
  z-index: 1;
  margin: 0 auto;
  text-align: center;
}

.hero-title {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-wordmark {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: clamp(2.5rem, 9vw, 6rem);
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--foreground);
}

.hero-subtitle {
  margin-top: 2rem;
  font-family: var(--font-sans);
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--muted-foreground);
}

.hero-lede {
  margin: 2rem auto 0;
  max-width: 36rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--muted-foreground);
  line-height: 1.7;
}

@media (min-width: 768px) {
  .hero-lede {
    font-size: 1rem;
  }
}

.hero-actions {
  margin-top: 3rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

@media (min-width: 640px) {
  .hero-actions {
    flex-direction: row;
    align-items: center;
    gap: 2rem;
  }
}

@media (min-width: 768px) {
  .hero-actions {
    margin-top: 3.5rem;
  }
}

/* ───────────────────────────────────────────
   Button
   ─────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.875rem 2rem;
  border: 1px solid var(--foreground);
  background: var(--foreground);
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--background);
  transition:
    background var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out),
    color var(--duration-base) var(--ease-out),
    transform var(--duration-base) var(--ease-out);
}

/* ───────────────────────────────────────────
   Pillars grid (3-column)
   ─────────────────────────────────────────── */

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

@media (min-width: 768px) {
  .pillars-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pillar-card {
  position: relative;
  padding: 2.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  border-top: 1px solid var(--border);
}

.pillar-card::after {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--foreground);
  opacity: 0.16;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-slow) var(--ease-out);
}

.pillar-card.is-visible::after {
  transform: scaleX(1);
}

@media (min-width: 768px) {
  .pillar-card {
    padding: 3rem 2.5rem 3rem 0;
  }

  .pillar-card:last-child {
    padding-right: 0;
  }

  .pillar-card + .pillar-card {
    padding-left: 2.5rem;
  }
}

.pillar-body {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  flex: 1;
}

.pillar-tag {
  font-family: var(--font-sans);
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted-foreground);
}

.pillar-title {
  font-family: var(--font-sans);
  font-size: 1.75rem;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--foreground);
  font-weight: 500;
  margin: 0;
}

@media (min-width: 768px) {
  .pillar-title {
    font-size: 2rem;
  }
}

.pillar-desc {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--muted-foreground);
  line-height: 1.6;
  margin: 0;
}

.pillar-list {
  margin-top: 1rem;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.pillar-list li {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  color: var(--muted-foreground);
  line-height: 1.6;
  padding-left: 1rem;
  position: relative;
}

.pillar-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 4px;
  height: 1px;
  background: var(--border);
}

/* ───────────────────────────────────────────
   Process list
   ─────────────────────────────────────────── */

.process-list {
  display: flex;
  flex-direction: column;
}

.process-row {
  position: relative;
  padding: 1.75rem 0;
  border-top: 1px solid var(--border);
}

.process-row::after {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--foreground);
  opacity: 0.14;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-slow) var(--ease-out);
}

.process-row.is-visible::after {
  transform: scaleX(1);
}

.process-row:last-child {
  border-bottom: 1px solid var(--border);
}

@media (min-width: 768px) {
  .process-row {
    padding: 2.25rem 0;
  }
}

.process-body {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

@media (min-width: 768px) {
  .process-body {
    flex-direction: row;
    align-items: baseline;
    gap: 2.5rem;
  }
}

.process-title {
  font-family: var(--font-sans);
  font-size: 1.125rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--foreground);
  flex-shrink: 0;
  min-width: 12rem;
}

.process-text {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--muted-foreground);
  line-height: 1.6;
  max-width: 36rem;
}

/* ───────────────────────────────────────────
   Principles
   ─────────────────────────────────────────── */

.principles-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 768px) {
  .principles-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem 3rem;
  }
}

.principle {
  position: relative;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--foreground);
  padding-left: 1.25rem;
  border-left: 1px solid var(--border);
}

.principle::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: -1px;
  width: 1px;
  background: var(--foreground);
  opacity: 0.16;
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--duration-slow) var(--ease-out);
}

.principle.is-visible::before {
  transform: scaleY(1);
}

@media (min-width: 768px) {
  .principle {
    font-size: 1.125rem;
  }
}

/* ───────────────────────────────────────────
   Hover states
   ─────────────────────────────────────────── */

@media (hover: hover) and (pointer: fine) {
  .btn:hover {
    background: transparent;
    border-color: var(--foreground);
    color: var(--foreground);
    transform: translateY(-1px);
  }
}

/* ───────────────────────────────────────────
   Contact section
   ─────────────────────────────────────────── */

.contact {
  text-align: center;
}

.contact-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.contact-title {
  font-family: var(--font-sans);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  letter-spacing: -0.03em;
  line-height: 1;
  font-weight: 400;
  color: var(--foreground);
}

.contact-text {
  max-width: 28rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--muted-foreground);
  line-height: 1.6;
}

@media (min-width: 768px) {
  .contact-text {
    font-size: 1rem;
  }
}

.contact-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .contact-actions {
    flex-direction: row;
    gap: 2.5rem;
  }
}

.contact-email {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--muted-foreground);
  border-bottom: 1px solid var(--border);
  padding-bottom: 2px;
  transition:
    color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .contact-email:hover {
    color: var(--foreground);
    border-color: var(--foreground);
  }
}

/* ───────────────────────────────────────────
   Footer / colophon
   ─────────────────────────────────────────── */

.colophon {
  border-top: 1px solid var(--border-30);
  padding-top: 2.5rem;
  padding-bottom: 2.5rem;
}

@media (min-width: 768px) {
  .colophon {
    padding-top: 3rem;
    padding-bottom: 3rem;
  }
}

.colophon-inner {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .colophon-inner {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
  }
}

.colophon-col {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.colophon-logo {
  width: clamp(120px, 18vw, 180px);
  height: auto;
  opacity: 0.82;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .colophon-col:nth-child(2) {
    align-items: center;
  }

  .colophon-col:last-child {
    align-items: flex-end;
  }
}

.colophon-name {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--foreground);
  font-weight: 500;
}

.colophon-text {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

.colophon-link {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--muted-foreground);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition:
    color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .colophon-link:hover {
    color: var(--foreground);
    border-color: var(--foreground);
  }
}

/* ───────────────────────────────────────────
   Back to top
   ─────────────────────────────────────────── */

.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-40);
  background: rgba(255, 249, 249, 0.9);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  color: var(--foreground);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition:
    opacity var(--duration-base) var(--ease-out),
    transform var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out);
  z-index: 50;
}

.back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

@media (hover: hover) and (pointer: fine) {
  .back-to-top:hover {
    border-color: var(--accent-60);
  }
}

/* ───────────────────────────────────────────
   Responsive overrides
   ─────────────────────────────────────────── */

@media (max-width: 1024px) {
  .hero-content {
    max-width: 100%;
  }
}

@media (max-width: 640px) {
  :root {
    --gutter: 1.25rem;
    --section-y: 4rem;
  }

  .grid-bg {
    background-size: 40px 40px;
  }
}