:root {
  /* Color primitives */
  --color-white:    #FFFFFF;
  --color-gray-100: #F7F7F7;
  --color-gray-200: #F0F0F0;
  --color-gray-250: #EDEDED;
  --color-gray-300: #E0E0E0;
  --color-gray-400: #BFBFBF;
  --color-gray-500: #999999;
  --color-gray-550: #878787;
  --color-gray-600: #737373;  /* Text-tertiary */
  --color-gray-650: #5F5F5F;  /* secondary color */
  --color-gray-700: #424242;
  --color-gray-800: #333333; 
  --color-gray-850: #262626;  /* dark background */
  --color-gray-900: #212121;
  --color-gray-1000: #0D0D0D; /* Text-primary */
       

  /* Semantic colors */
  --color-bg-default: var(--color-white);
  --color-bg-light-gray: var(--color-gray-200);
  --color-bg-black: var(--color-gray-1000);
  --color-text-primary-on-light: var(--color-gray-1000);   /* on light */
  --color-text-secondary-on-light: var(--color-gray-650); /* on light */
  --color-text-tertiary-on-light: var(--color-gray-600);
  --color-text-primary-on-dark: var(--color-white);       /* on dark */
  --color-text-secondary-on-dark: var(--color-gray-550);  /* on dark */
  --color-border: var(--color-gray-200);


  --opacity-body: 0.6;




  /* Spacing */
  --spacing-0: 0rem;
  --spacing-2: 0.125rem;
  --spacing-4: 0.25rem;
  --spacing-8: 0.5rem;
  --spacing-12: 0.75rem;
  --spacing-16: 1rem;
  --spacing-24: 1.5rem;
  --spacing-32: 2rem;
  --spacing-40: 2.5rem;
  --spacing-48: 3rem;
  --spacing-64: 4rem;
  --spacing-80: 5rem; /* 80px */
  --spacing-120: 7.5rem;
  --spacing-160: 10rem; /* 160px */
  --spacing-200: 12.5rem; /* 200px */
  --spacing-400: 25rem;

  /* Radius */
  --radius-0: 0rem;
  --radius-4: 0.25rem;
  --radius-8: 0.5rem;
  --radius-max: 9999;


  /* Font family */
  /* --font-family: "Neue Haas Unica", "Helvetica Neue", Helvetica, Arial, sans-serif; */
  --font-family: "univers-next-pro", "Helvetica Neue", Helvetica, Arial, sans-serif; 


  /* Font Size tokens */
  --text-display-56: 3.5rem; /* 56px */

  --text-display-lg-min: 2rem; /* 32px */
  --text-display-lg-max: 3.5rem; /* 56px */
  --text-display-lg: clamp(var(--text-display-lg-min), 1.7rem + 1.5vw, var(--text-display-lg-max));

  --text-display-48: 3rem; /* 48px */
  --text-heading-40: 2.5rem; /* 40px */ 
  --text-heading-32: 2rem; /* 32px */
  --text-heading-28: 1.75rem; /* 28px */
  --text-heading-24: 1.5rem; /* 24px*/
  --text-heading-20: 1.25rem; /* 20px */
  --text-heading-18: 1.125rem; /* 18px */
  --text-heading-16: 1rem; /* 16px */
  --text-body-18: 1.125rem; /* 18px */
  --text-body-16: 1rem;
  --text-body-16-r: clamp(1rem,0.9681rem + 0.1307vw, 1.125rem); 
  --text-body-14: 0.875rem; /* 14px */
  --text-nav-link: 0.9375rem; /* 15px */
  --text-caption-14: 0.875rem; /* 14px */
  --text-caption-13: 0.8125rem; /* 13px */
  --text-caps: 0.6875rem; /* 11px */

  --text-title: clamp(var(--text-heading-20),calc(1.189rem + 0.259vw),var(--text-heading-24));
  /* --text-hp-intro: clamp(var(--text-heading-20), 1.2rem + 0.25vw, var(--text-heading-24)); */

  
  /* Weights */
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;


  /* Line-height tokens */
  --line-height-display: 1.1;
  --line-height-heading: 1.1;
  --line-height-body: 1.45;
  --line-height-caption: 1.1;
  --line-height-label: 1.2;


  /* Letter-spacing tokens */ 
  --letter-spacing-display: -0.0325em;
  --letter-spacing-heading: -0.0325em;
  --letter-spacing-heading-sm: -0.0175em;
  --letter-spacing-body: -0.01em;
  --letter-spacing-caption: 0.005em;
  --letter-spacing-nav: -0.005em;
  --letter-spacing-caps: 0.06em;


  /* Text block max width */
  --text-max-width: 75ch;


  /* Grid */
  --grid-columns: 12;
  --margin: 1.5rem;   /* 24px */
  --gutter: 1rem;     /* 16px */
  --margin-mobile: 1rem;
  --gutter-mobile: 0.5rem;
  

  /* Motion */
  --transition-fast: 0.2s ease;
  --transition-slow: 0.6s ease;
}



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


html, body {
overflow-x: clip;
}

html {
  /* Reserve the scrollbar's width permanently — otherwise locking scroll on
     menu-open (body.nav-open below) hands that width back to the viewport,
     which can push a window near the 768px breakpoint across it and flip
     the mobile nav overlay's media query off mid-open. */
  scrollbar-gutter: stable;
}

html, body, h1, h2, h3, h4, p, ul, ol, li, figure, figcaption, blockquote, dl, dd {
margin: 0;
padding: 0;
}

body {
  font-family: var(--font-family);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;

  font-feature-settings: "lnum" 1, "pnum" 1; 
  /* font-variant-numeric: oldstyle-nums proportional-nums; */
  /* font-feature-settings: "tnum" on, "lnum" on, "pnum" on; */

  background-color: var(--color-bg-default);
  transition: background-color var(--transition-slow);
}

body.is-dark-section {
  background-color: var(--color-bg-black);
}

ul, ol {
list-style: none;
}

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

input, button, textarea, select {
font: inherit;
color: inherit;
margin: 0;
}

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

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


/* TYPOGRAPHY */
.paragraph {
  font-family: var(--font-family);
  font-size: var(--text-body-16);
  font-weight: var(--font-weight-regular);
  letter-spacing: var(--letter-spacing-body);
  color: var(--color-text-primary-on-light);
}

.subheader {
  font-family: var(--font-family);
  font-size: var(--text-heading-28);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-heading);
  letter-spacing: var(--letter-spacing-heading);
  max-width: var(--text-max-width);
  color: var(--color-text-primary-on-light);
}

.text-link {
  font-size: inherit;
  font-weight: var(--font-weight-light);
  font-style: italic;
}



/* LAYOUT */
.container {
  width: 100%;
  padding-inline: var(--margin);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gutter);
}

.section {
  padding-bottom: var(--spacing-120);
}


@media (max-width: 768px) {

  .container {
    padding-inline: var(--margin-mobile);
  }
.grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  column-gap:  var(--gutter-mobile);
}

.section {
  padding-bottom: var(--spacing-48);
}
}


/* PROJECT CARD — shared across the homepage work grid and case study "next project" links */
.project-card-link {
  display: block;
  grid-column: span 3;
}

.project-card {
  display: flex;
  flex-direction: column;
  row-gap: var(--spacing-12);
}

.project-media {
  /* aspect-ratio: 4 / 5; */
  width: 100%;
  height: auto;
  overflow: hidden;
  background-color: var(--color-bg-light-gray);
}

.project-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-info {
  display: flex;
  flex-direction: column;
  row-gap: var(--spacing-0);
}

.project-title {
  font-family: var(--font-family);
  font-size: var(--text-body-16);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-body);
  letter-spacing: var(--letter-spacing-body);
  color: var(--color-text-primary-on-light);
}

.project-tags {
  font-family: var(--font-family);
  font-size: var(--text-body-16);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-body);
  letter-spacing: var(--letter-spacing-body);
  color: var(--color-text-secondary-on-light);
}

.project-eyebrow {
  font-family: var(--font-family);
  font-size: var(--text-caption-12);
  font-weight: var(--font-weight-regular);
  letter-spacing: var(--letter-spacing-caption);
  color: var(--color-text-secondary-on-light);
}

/* Mobile: cards stack full-width instead of sitting 3-columns-wide */
@media (max-width: 768px) {
  .project-card-link {
    grid-column: 1 / -1;
  }
}


/* NAV */
.site-nav {
  position: fixed;
  left: 0;
  width: 100%;
  top: 0;
  z-index: 50;
  background-color: var(--color-bg-default);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.nav-inner {
  align-items: center;
  padding-block: var(--spacing-16);
}

.nav-name {
  grid-column: 1 / span 3;
  font-family: var(--font-family);
  font-size: var(--text-nav-link);
  line-height: var(--line-height-label);
  font-weight: var(--font-weight-regular);
  letter-spacing: var(--letter-spacing-nav);
  color: var(--color-text-primary-on-light);
  transition: color var(--transition-fast);
}

.nav-name:hover {
  color: var(--color-text-secondary-on-light);
}

.nav-links {
  display: contents;
  /* transform/opacity declared unconditionally (not inside the mobile media
     query) so these values never change when the breakpoint is crossed —
     only .is-open toggling changes them. If they only existed inside the
     media query, entering it would introduce transform/opacity for the
     first time, and the browser would animate in from their implicit
     desktop defaults (transform: none, opacity: 1 — i.e. a fully visible
     box) before settling on the closed state, flashing the overlay open on
     resize. At desktop these are inert since display: contents generates no
     box. pointer-events is NOT part of this — it's not in the transition
     list below, so it's kept mobile-only; pointer-events inherits to
     children, and set here it would silently block clicks/hover on the
     desktop nav links. */
  transform: translateY(-100%);
  opacity: 0;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-link {
  position: relative;
  font-family: var(--font-family);
  font-size: var(--text-nav-link);
  line-height: var(--line-height-label);
  font-weight: var(--font-weight-regular);
  letter-spacing: var(--letter-spacing-nav);
  color: var(--color-text-primary-on-light);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.nav-link.is-active,
.nav-link:hover {
  color: var(--color-text-secondary-on-light);
}

.nav-link[data-nav-link="work"] {
  grid-column: 7 / span 1;
}

.nav-link[data-nav-link="about"] {
  grid-column: 8 / span 1;
}

/* Copy-email button — shared control used by both the nav and footer
   "Copy email" buttons so they look and behave identically. .nav-contact
   and .footer-cta-button (further down) carry only what's unique to each
   placement — grid position for one, nothing extra yet for the other. */
.copy-email-btn {
  position: relative;
  background: none;
  border: none;
  padding: 0;
  font-family: var(--font-family);
  font-size: var(--text-nav-link);
  font-weight: var(--font-weight-regular);
  letter-spacing: var(--letter-spacing-nav);
  color: var(--color-text-primary-on-light);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.copy-email-btn:hover {
  color: var(--color-text-secondary-on-light);
}

body.is-dark-section .copy-email-btn {
  color: var(--color-text-primary-on-dark);
}

body.is-dark-section .copy-email-btn:hover {
  color: var(--color-text-secondary-on-dark);
}

.nav-contact {
  grid-column: 9 / span 4;
  justify-self: end;
  text-align: right;
}

.font-weight-light {
  font-weight: var(--font-weight-light);
}

/* Shared tooltip that pops under both copy-email buttons; .nav-tooltip and
   .footer-tooltip (further down) only set which side it hangs from, since
   the buttons sit at opposite ends of their containers. */
.copy-email-tooltip {
  position: absolute;
  top: calc(100% + var(--spacing-8));
  padding: var(--spacing-4) var(--spacing-8);
  font-size: var(--text-caption-14);
  color: var(--color-text-primary-on-dark);
  background-color: var(--color-bg-black);
  border-radius: var(--radius-0);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
}

.copy-email-tooltip.is-visible {
  opacity: 1;
}

.nav-tooltip {
  right: 0;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  row-gap: var(--spacing-4);
  grid-column: 12 / span 1;
  justify-self: end;
  background: none;
  border: none;
  min-width: 2.75rem; /* 44px tap target */
  min-height: 2.75rem;
  cursor: pointer;
}

.nav-toggle-bar {
  width: 24px;
  height: 1px;
  background-color: var(--color-text-primary-on-light);
  transition: background-color var(--transition-fast), transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
    transform: translateY(calc(var(--spacing-4) + 1px)) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
    transform: translateY(calc(-1 * (var(--spacing-4) + 1px))) rotate(-45deg);
}

/* Dark background sync — active while .about-offscreen is in view */
body.is-dark-section .site-nav {
  background-color: var(--color-bg-black);
  border-bottom-color: var(--color-gray-850);
}

body.is-dark-section .nav-name,
body.is-dark-section .nav-link {
  color: var(--color-text-primary-on-dark);
}

body.is-dark-section .nav-name:hover,
body.is-dark-section .nav-link.is-active,
body.is-dark-section .nav-link:hover {
  color: var(--color-text-secondary-on-dark);
}

body.is-dark-section .nav-toggle-bar {
  background-color: var(--color-text-primary-on-dark);
}

/* The open mobile menu is always the light theme, even over the about
   page's dark section — these win on specificity (extra .nav-open class)
   over the body.is-dark-section rules above regardless of source order. */
body.nav-open.is-dark-section .site-nav {
  background-color: var(--color-bg-default);
  border-bottom-color: var(--color-border);
}

body.nav-open.is-dark-section .nav-name,
body.nav-open.is-dark-section .nav-link {
  color: var(--color-text-primary-on-light);
}

body.nav-open.is-dark-section .nav-name:hover,
body.nav-open.is-dark-section .nav-link.is-active,
body.nav-open.is-dark-section .nav-link:hover {
  color: var(--color-text-secondary-on-light);
}

body.nav-open.is-dark-section .nav-toggle-bar {
  background-color: var(--color-text-primary-on-light);
}

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

/* NAV MOBILE */

@media (max-width: 768px) {
    .nav-name {
        position: relative;
        z-index: 2;
    }

    .nav-toggle {
        display: flex;
        grid-column: 4 / span 2;
        position: relative;
        z-index: 2;
    }

    .nav-links {
        display: flex;
        grid-column: 1 / -1;
        position: fixed;
        inset: 0;
        z-index: 1;
        flex-direction: column;
        justify-content: center;
        /* align-items: flex-start; */
        align-items: center;
        gap: var(--spacing-24);
        padding-inline: var(--margin);
        background-color: var(--color-bg-default);
        pointer-events: none;
    }

    .nav-link {
      font-size: var(--text-heading-28);
      font-weight: var(--font-weight-regular);
      line-height: var(--line-height-heading);
      /* Flex items blockify, so this padding grows the actual tap area
         (text alone is ~31px tall) up past the 44px target. */
      padding-block: var(--spacing-8);
    }

    .nav-contact {
      margin-top: var(--spacing-80);
    }

    .nav-links.is-open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .nav-link[data-nav-link="work"],
    .nav-link[data-nav-link="about"] {
        grid-column: auto;
    }

    .nav-contact {
        grid-column: auto;
        justify-self: auto;
        text-align: left;
    }

    body.nav-open {
        overflow: hidden;
    }
}




/* FOOTER */
.footer {
  padding-top: var(--spacing-64);
  padding-bottom: var(--spacing-40);
  border-top: 1px solid var(--color-border);
  transition: border-color var(--transition-fast);
}

.footer-grid {
  align-items: start;
}

.footer-metadata {
  grid-column: 1 / span 2;
  font-family: var(--font-family);
  font-size: var(--text-caption-13);
  font-weight: var(--font-weight-regular);
  letter-spacing: var(--letter-spacing-caption);
  line-height: var(--line-height-body);
  color: var(--color-text-secondary-on-light);
  /* text-transform: uppercase; */
  transition: color var(--transition-fast);
  /* align-self: end; */
}


.footer-cta {
  grid-column: 7 / span 4;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  row-gap: var(--spacing-4);
  align-self: flex-start;
}

.footer-cta-label {
  font-family: var(--font-family);
  font-size: var(--text-heading-16);
  font-weight: var(--font-weight-regular);
  letter-spacing: var(--letter-spacing-body);
  line-height: var(--line-height-body);
  color: var(--color-text-secondary-on-light);
  transition: color var(--transition-fast);
} 

.footer-cta-button {
 font-size: var(--text-heading-16);
}


.footer-tooltip {
  left: 0;
}


.footer-links {
  grid-column: 12 / span 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start; /* left-align within the column, not flex-end */
  row-gap: var(--spacing-2);
  align-self: end;
} 

.footer-link {
  display: inline-flex;
  align-items: center;
  column-gap: var(--spacing-2);
  font-family: var(--font-family);
  font-size: var(--text-caps);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-body);
  letter-spacing: var(--letter-spacing-caps);
  color: var(--color-text-secondary-on-light);
  transition: color var(--transition-fast);
  text-transform: uppercase;
}

.footer-link-icon {
  width: 1rem;
  height: 1rem;
  opacity: 0;
  transform: translate(-0.15rem, 0.15rem);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-text-primary-on-light);
}

.footer-link:hover .footer-link-icon {
  opacity: 1;
  transform: translate(0, 0);
  color: var(--color-text-primar-on-light);
}

/* Dark background sync — active while .about-offscreen is in view */
body.is-dark-section .footer {
  border-top-color: var(--color-gray-850);
}

body.is-dark-section .footer-metadata,
body.is-dark-section .footer-cta-label,
body.is-dark-section .footer-link {
  color: var(--color-text-secondary-on-dark);
}

body.is-dark-section .footer-link:hover {
  color: var(--color-text-primary-on-dark);
}

body.is-dark-section .footer-link-icon {
  filter: invert(1);
}



@media (max-width: 768px) {
  .footer-grid {
    display: flex;
    flex-direction: column;
    row-gap: var(--spacing-32);
  }

  .footer-cta,
  .footer-links,
  .footer-metadata {
    grid-column: auto;
  }

  .footer-links {
    align-items: flex-start;
    align-self: flex-start;
    order: 2;
  }

  .footer-cta {
    order: 1;
  }

  .footer-metadata {
    order: 3;
  }
}