/* ---------- Design tokens ---------- */
:root {
  --ink: #0a0a0a;
  --paper: #fafafa;
  --ink-70: rgba(10, 10, 10, 0.7);
  --ink-45: rgba(10, 10, 10, 0.55);
  --ink-12: rgba(10, 10, 10, 0.12);
  --paper-70: rgba(250, 250, 250, 0.7);
  --paper-45: rgba(250, 250, 250, 0.55);
  --paper-16: rgba(250, 250, 250, 0.16);

  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --gutter: clamp(1.5rem, 5vw, 4rem);
  --section-pad-y: clamp(4.5rem, 12vw, 9rem);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.01em;
}

/* fixed, non-scrolling grain texture for tactile depth */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  opacity: 0.035;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 0.75rem 1.25rem;
  z-index: 1000;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 4px;
}

/* ---------- Nav ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color 0.4s var(--ease), border-color 0.4s var(--ease),
    backdrop-filter 0.4s var(--ease);
}

.nav.is-scrolled {
  background: rgba(250, 250, 250, 0.82);
  border-bottom-color: var(--ink-12);
  backdrop-filter: blur(10px);
}

.nav__inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.25rem var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__mark {
  font-family: var(--font-body);
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.15em;
}

.nav__links {
  display: flex;
  gap: 2.25rem;
}

.nav__links a {
  position: relative;
  font-size: 0.9rem;
  font-weight: 500;
  padding-bottom: 4px;
}

.nav__links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 1px;
  width: 100%;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.35s var(--ease);
}

.nav__links a:hover::after,
.nav__links a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav__toggle span {
  display: block;
  height: 1.5px;
  background: var(--ink);
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

/* ---------- Section base ---------- */
.section {
  padding: var(--section-pad-y) var(--gutter);
  position: relative;
}

.section--light {
  background: var(--paper);
  color: var(--ink);
}

.section--dark {
  background: var(--ink);
  color: var(--paper);
}

.kicker {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.9rem 1.75rem;
  border-radius: 2px;
  transition: background-color 0.25s var(--ease), color 0.25s var(--ease),
    border-color 0.25s var(--ease), transform 0.15s var(--ease);
}

.btn:active {
  transform: scale(0.98);
}

.btn--solid {
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
}

.btn--solid:hover {
  background: transparent;
  color: var(--ink);
}

.btn--ghost {
  background: transparent;
  border: 1px solid transparent;
  color: var(--ink-70);
  padding-inline: 0.25rem;
}

.btn--ghost:hover {
  color: var(--ink);
}

.btn--ghost span {
  transition: transform 0.25s var(--ease);
  display: inline-block;
}

.btn--ghost:hover span {
  transform: translateY(3px);
}

/* ---------- Hero ---------- */
.hero {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--section-pad-y) + 3rem);
  overflow: hidden;
}

.hero__watermark {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-body);
  font-weight: 800;
  font-size: clamp(6rem, 32vw, 26rem);
  letter-spacing: -0.02em;
  color: var(--ink);
  opacity: 0.035;
  white-space: nowrap;
  z-index: 0;
  user-select: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 780px;
}

.hero__headline {
  font-size: clamp(2.5rem, 6vw, 5rem);
  margin-bottom: 1.75rem;
}

.hero__sub {
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  color: var(--ink-70);
  max-width: 56ch;
  margin-bottom: 2.5rem;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

/* ---------- Work / What We Do ---------- */
.section__head {
  max-width: 900px;
  margin-bottom: clamp(3rem, 6vw, 5rem);
}

.section__head h2 {
  font-size: clamp(2rem, 4vw, 3.25rem);
  margin-bottom: 1rem;
}

.section__sub {
  color: var(--paper-70);
  font-size: 1.1rem;
}

.pillars {
  display: grid;
  grid-template-columns: 1fr 1px 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  max-width: 1200px;
}

.pillar__divider {
  background: var(--paper-16);
}

.pillar {
  max-width: 46ch;
}

.pillar__num {
  display: block;
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--paper-45);
  margin-bottom: 1rem;
}

.pillar h3 {
  font-size: clamp(1.4rem, 2.4vw, 1.85rem);
  margin-bottom: 1rem;
}

.pillar p {
  color: var(--paper-70);
  margin-bottom: 1.5rem;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.tags li {
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid var(--paper-16);
  border-radius: 2px;
  padding: 0.4rem 0.75rem;
  color: var(--paper-70);
}

.work__closing {
  margin-top: clamp(3rem, 6vw, 5rem);
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  max-width: 46ch;
}

/* ---------- About ---------- */
.about__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2.5rem, 6vw, 4rem);
  max-width: 1200px;
}

.about__lead {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  line-height: 1.25;
  max-width: 32ch;
}

.principle {
  border-top: 1px solid var(--ink-12);
  padding-top: 1.5rem;
  margin-bottom: 2rem;
}

.principle h3 {
  font-size: 1.15rem;
  margin-bottom: 0.6rem;
}

.principle p {
  color: var(--ink-70);
  max-width: 60ch;
}

.about__closing {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-top: 2.5rem;
}

/* ---------- Contact ---------- */
.contact {
  text-align: center;
}

.contact__content {
  max-width: 640px;
  margin: 0 auto;
}

.contact h2 {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  margin-bottom: 1rem;
}

.contact__sub {
  color: var(--paper-70);
  margin-bottom: 2.5rem;
}

.contact__email {
  display: inline-block;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  border-bottom: 1px solid var(--paper-45);
  padding-bottom: 0.35rem;
  transition: border-color 0.25s var(--ease), opacity 0.25s var(--ease);
}

.contact__email:hover {
  border-color: var(--paper);
}

.contact__meta {
  margin-top: 2.5rem;
  font-size: 0.9rem;
  color: var(--paper-45);
}

/* ---------- Footer ---------- */
.footer {
  background: var(--ink);
  color: var(--paper-45);
  padding: 1.75rem var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  border-top: 1px solid var(--paper-16);
}

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

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

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

  * {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .about__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  .nav__links {
    position: fixed;
    inset: 0 0 auto 0;
    top: 0;
    flex-direction: column;
    background: var(--paper);
    padding: 6rem var(--gutter) 2.5rem;
    gap: 1.75rem;
    transform: translateY(-100%);
    transition: transform 0.4s var(--ease);
    border-bottom: 1px solid var(--ink-12);
  }

  .nav__links.is-open {
    transform: translateY(0);
  }

  .nav__links a {
    font-size: 1.25rem;
  }

  .nav__toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(6.5px) rotate(45deg);
  }

  .nav__toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
  }

  .nav__toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-6.5px) rotate(-45deg);
  }

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

  .pillar__divider {
    width: 100%;
    height: 1px;
  }

  .hero {
    padding-top: calc(var(--section-pad-y) + 5.5rem);
  }
}

@media (max-width: 480px) {
  .hero__actions {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.25rem;
  }

  .footer {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }
}