/* -- Custom properties ----------------------------------------------------- */
:root {
  /* Palette — raw color tokens */
  --primary-red:    #FF2C2C;
  --primary-yellow: #FFC72C;
  --primary-green:  #14AE5C;
  --primary-blue:   #58A9FF;
  --accent-red:     oklch(from var(--primary-red) calc(l * .75) c h);
  --accent-yellow:  oklch(from var(--primary-yellow) calc(l * .75) c h);
  --accent-green:   oklch(from var(--primary-green) calc(l * .75) c h);
  --accent-blue:    oklch(from var(--primary-blue) calc(l * .75) c h);

  --paper-0:   #fff;
  --paper-50:  #fbfaf6;
  --paper-100: #f4f1e8;
  --paper-200: #e8e3d3;
  --paper-300: #d4ccb3;

  --ink-900: #121416;
  --ink-700: #2a2f36;
  --ink-500: #4a5158;
  --ink-400: #6b7178;
  --ink-300: #9a9ea3;

  --ember-700: #b7410e;
  --ember-600: #d0541a;
  --ember-500: #e8742f;
  --ember-100: #fde8d8;

  --moss-800: #1f3a2e;
  --moss-100: #dde8e1;

  /* Semantic tokens */
  --bg:         var(--paper-0);
  --bg-raised:  #ffffff;
  --bg-sunken:  var(--paper-50);
  --bg-inverse: var(--ink-900);

  --fg:               var(--ink-900);
  --fg-muted:         var(--ink-500);
  --fg-subtle:        var(--ink-400);
  --fg-inverse:       rgb(from var(--fg) calc(255 - r) calc(255 - g) calc(255 - b) );
  --fg-muted-inverse: rgb(from var(--ink-700) calc(255 - r) calc(255 - g) calc(255 - b) );

  --accent:       var(--ember-600);
  --accent-hover: var(--ember-500);
  --accent-press: var(--ember-700);
  --accent-text:  var(--ember-700);

  --border:     var(--paper-200);
  --border-ink: var(--ink-900);
  --focus-ring: var(--ember-600);

  /* Typography */
  --font-serif: 'Stack Sans Headline', Georgia, serif;
  --font-sans:  'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono:  'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  --fs-display: clamp(2.75rem, 5vw + 1.5rem, 5.75rem);
  --fs-h2-lg:   clamp(2rem, 3vw + 0.5rem, 3.25rem);
  --fs-h2:      clamp(1.75rem, 2.5vw + 0.25rem, 2.75rem);
  --fs-h3:      1.375rem;
  --fs-body:    1.0625rem;
  --fs-small:   0.9375rem;
  --fs-micro:   0.8125rem;
  --fs-mono:    0.875rem;

  --lh-tight: 1.05;
  --lh-snug:  1.2;
  --lh-body:  1.55;

  --tracking-tight: -0.025em;
  --tracking-snug:  -0.01em;
  --tracking-caps:   0.14em;

  /* Spacing — 4px base ladder */
  --sp-1:  0.25rem;   /*  4px */
  --sp-2:  0.5rem;    /*  8px */
  --sp-3:  0.75rem;   /* 12px */
  --sp-4:  1rem;      /* 16px */
  --sp-5:  1.5rem;    /* 24px */
  --sp-6:  2rem;      /* 32px */
  --sp-7:  3rem;      /* 48px */
  --sp-8:  4rem;      /* 64px */
  --sp-9:  6rem;      /* 96px */
  --sp-10: 8rem;      /* 128px */
  --sp-11: 10rem;     /* 160px */

  --new-sp-factor: calc();
  --new-sp-1: calc();

  /* Layout */
  --max-width:  75rem;
  --gutter:     var(--sp-6);
  --section-v:  var(--sp-10);

  /* Radius */
  --radius-1:   2px;

  /* Shadows */
  --shadow-1: 0 1px 0 rgba(18,20,22,.04), 0 1px 2px rgba(18,20,22,.06);
  --shadow-2: 0 2px 0 rgba(18,20,22,.04), 0 6px 16px -4px rgba(18,20,22,.10);
  /* "shadow-print" — hairline ink outline + 4px offset = risograph print feel */
  --shadow-print: 0 1px 0 var(--ink-900), 0 4px 0 -1px var(--ink-900);

  /* Motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-fast: 120ms;
  --dur-base: 200ms;
}

/* -- Reset & base ---------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 17px;
  font-family: var(--font-sans);
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  margin: 0;
  line-height: var(--lh-body);
}

img,
svg {
  display: block;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  line-height: var(--lh-tight);
}

p {
  margin: 0;
}

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

a {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  transition: color var(--dur-fast) var(--ease-out),
              text-decoration-thickness var(--dur-fast) var(--ease-out);
}

a:hover {
  color: var(--ember-500);
  text-decoration-thickness: 2px;
}

::selection {
  background: var(--ember-100);
  color: var(--ink-900);
}

*:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
  border-radius: var(--radius-1);
}

/* -- Utility: section heading ---------------------------------------------- */
.heading {
  font-family: var(--font-serif);
  font-size: var(--fs-h2);
  font-weight: 500;
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-tight);
  font-variation-settings: 'opsz' 60;
}

/* -- Utility: eyebrow label ------------------------------------------------ */
.eyebrow {
  font-family: var(--font-serif);
  font-size: var(--fs-micro);
  font-weight: 500;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--primary-red);
  line-height: 1.4;
}

/* -- Utility: button ------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: var(--fs-small);
  letter-spacing: -0.005em;
  padding: calc(var(--sp-3) - 0.125rem) 1.25rem; /* 11px 20px */
  border-radius: var(--sp-2);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out);
}

.btn--primary {
  background: var(--primary-green);
  color: var(--paper-0);
  border: 1px solid var(--accent-green);
  text-shadow: 0px 0.025rem 0.3rem rgba(0 0 0 / 0.5);
}
.btn--primary:hover {
  background: var(--primary-green);
  text-decoration: none;
}
.btn--primary:active {
  background: var(--primary-green);
}

.btn--secondary {
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border-ink);
}
.btn--secondary:hover {
  background: var(--bg-sunken);
  color: var(--fg);
  text-decoration: none;
}

.btn--sm {
  font-size: var(--fs-micro);
  padding: 0.375rem 0.75rem;
}

/* -- Navigation ------------------------------------------------------------ */
.nav {
  position: sticky;
  top: 0;
  z-index: 1;

  padding: 1.125rem var(--gutter);
  background: var(--bg);
  border-bottom: 1px solid transparent;
  transition: background var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out),
              backdrop-filter var(--dur-base) var(--ease-out);
}

.nav--scrolled {
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom-color: var(--border);
}

.nav__inner {
  max-width: var(--max-width);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-5);
}

/* Logo lockup: mark image + stacked wordmark text */
.nav__brand {
  display: flex;
  align-items: center;
  gap: 0.6875rem;
  text-decoration: none;
  flex-shrink: 0;
  color: var(--fg);
}
.nav__brand:hover {
  text-decoration: none;
  color: var(--fg);
}

.nav__logo-mark {
  height: var(--sp-7);
  width: auto;
  flex-shrink: 0;
}

.nav__logo-wordmark {
  display: flex;
  flex-direction: column;
  line-height: 0.8;
  gap: 0;
}

.nav__logo-line {
  font-family: var(--font-serif);
  font-size: 1.175rem;
  font-weight: 600;
  letter-spacing: var(--tracking-tight);
  font-variation-settings: 'opsz' 16;
  color: var(--fg);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--sp-2);
  color: var(--fg);
  line-height: 1;
}

.nav__toggle-icon {
  display: block;
}
.nav__toggle-icon--close {
  display: none;
}

.nav--open .nav__toggle-icon {
  display: none;
}
.nav--open .nav__toggle-icon--close {
  display: block;
}

/* Mobile-only CTA inside the nav dropdown — hidden on desktop */
.nav__cta-mobile {
  display: none;
}

/* -- Hero ------------------------------------------------------------------ */
.hero {
  padding: calc(var(--sp-7) + var(--sp-5)) var(--gutter) var(--section-v);
}

.hero__inner {
  max-width: var(--max-width);
  margin-inline: auto;
}

.hero__heading {
  font-size: var(--fs-display);
  color: var(--fg);
  margin: 0 0 var(--sp-6);
  max-width: 61.25rem;
  text-wrap: balance;
}

.hero__heading-accent {
  color: var(--primary-red);
  font-style: normal;
  font-variation-settings: 'opsz' 60;
}

.hero__lede {
  font-family: var(--font-sans);
  font-size: 1.375rem;
  line-height: 1.45;
  color: var(--fg-muted);
  max-width: 45rem;
  margin: 0 0 calc(var(--sp-7) - var(--sp-3)); /* 40px */
  text-wrap: pretty;
}

.hero__actions {
  display: flex;
  gap: 0.875rem;
  align-items: center;
  flex-wrap: wrap;
}

/* -- Services -------------------------------------------------------------- */
.services {
  padding: var(--section-v) var(--gutter);
  background: var(--bg-sunken);
}

.services__inner {
  max-width: var(--max-width);
  margin-inline: auto;
}

.services__header {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-8);
  margin-bottom: var(--sp-8);
  align-items: start;
}

.services__header-eyebrow {
  margin-bottom: var(--sp-4);
}

.services__heading {
  color: var(--fg);
}

.services__intro {
  font-family: var(--font-sans);
  font-size: 1.125rem;
  line-height: var(--lh-body);
  color: var(--fg-muted);
  max-width: 35rem;
}

.services__list {
  display: flex;
  flex-direction: column;
}

.services__item {
  display: grid;
  grid-template-columns: 3rem 1fr 1fr 12.5rem;
  gap: var(--sp-6);
  padding: 1.75rem 0;
  border-top: 1px solid var(--border-ink);
  align-items: start;
}

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

.services__item-num {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  font-weight: 800;
}

.services__item-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 500;
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-snug);
  color: var(--fg);
}

.services__item-body {
  font-family: var(--font-sans);
  font-size: var(--fs-small);
  line-height: var(--lh-body);
  color: var(--fg-muted);
}

.services__item-estimate {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--fg-subtle);
  letter-spacing: 0.04em;
  line-height: 1.5;
}
.services__item-estimate:before {
  display: block;
  content: "Typical engagement";
  font-weight: 800;
}

/* -- Work (case studies) --------------------------------------------------- */
.work {
  padding: var(--section-v) var(--gutter);
}

.work__inner {
  max-width: var(--max-width);
  margin-inline: auto;
}

.work__eyebrow {
  margin-bottom: var(--sp-4);
}

.work__heading {
  color: var(--fg);
  margin: 0 0 var(--sp-8);
  max-width: 47.5rem;
}

.work__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-5);
}

/* -- Case card ------------------------------------------------------------- */
.case-card {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  padding: 1.75rem 1.75rem 2rem;
  display: flex;
  flex-direction: column;
  min-height: 15rem;
}

.case-card--featured {
  border-color: var(--border-ink);
  box-shadow: var(--shadow-print);
}

.case-card__tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 0.875rem;
}

.case-card--featured .case-card__tag {
  color: var(--accent-text);
}

.case-card__title {
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  font-weight: 500;
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-snug);
  color: var(--fg);
  margin: 0 0 0.875rem;
}

.case-card__body {
  font-family: var(--font-sans);
  font-size: var(--fs-small);
  line-height: var(--lh-body);
  color: var(--fg-muted);
  margin: 0 0 auto;
}

.case-card__meta {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--fg-subtle);
  margin-top: var(--sp-5);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--border);
}

/* -- Standards (dark section) ---------------------------------------------- */
.standards {
  padding: var(--section-v) var(--gutter);
}

.standards__inner {
  max-width: var(--max-width);
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-8);
  align-items: start;
}

.standards__eyebrow {
  color: var(--primary-red);
  margin-bottom: var(--sp-4);
}

.standards__body {
  font-family: var(--font-sans);
  font-size: 1.125rem;
  line-height: var(--lh-body);
}

.standards__body + .standards__body {
  margin-top: var(--sp-4);
}

.standards__body a {
  color: var(--ember-500);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.standards__body a:hover {
  color: var(--ember-400); text-decoration-thickness: 2px;
}

/* -- Contact --------------------------------------------------------------- */
.contact {
  background: var(--bg-inverse);
  padding: var(--section-v) var(--gutter);
  color: var(--fg-muted-inverse);
}

.contact__inner {
  max-width: var(--max-width);
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-8);
  align-items: start;
}

.contact__eyebrow {
  margin-bottom: var(--sp-4);
}

.contact__heading {
  color: var(--fg-inverse);
  margin: 0 0 var(--sp-5);
}

.contact__lede {
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  text-wrap: pretty;
}

.contact__actions {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  justify-content: flex-start;
}

.contact__action-note {
  font-family: var(--font-sans);
  font-size: var(--fs-small);
  line-height: var(--lh-body);
  padding-top: var(--sp-3);
}

/* -- Footer ---------------------------------------------------------------- */
.footer {
  border-top: 1px solid var(--border-ink);
  padding: var(--sp-8) var(--gutter) var(--sp-7);
}

.footer__bottom {
  max-width: var(--max-width);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--sp-3);
}

.footer__bottom-text {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--fg-subtle);
  letter-spacing: 0.04em;
}

/* -- Logo mark SVG fill — set via CSS so both light instances match fg -- */
.nav__logo-mark path,
.footer__logo-mark path {
  fill: var(--fg);
}

/* -- Media queries — tablet ------------------------------------------------ */
@media (max-width: 899px) {
  :root {
    --gutter: 1.5rem;
    --section-v: var(--sp-8);
  }

  /* Nav: collapse links behind hamburger */
  .nav__links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    background: var(--bg);
    border-bottom: 1px solid var(--border-ink);
    padding: var(--sp-4) var(--gutter) var(--sp-5);
    gap: var(--sp-4);
    box-shadow: var(--shadow-2);
  }

  .nav--open .nav__links {
    display: flex;
  }

  .nav__cta {
    display: none;
  }

  .nav__toggle {
    display: flex;
    align-items: center;
  }

  .nav__cta-mobile {
    display: inline-flex;
  }

  /* Hero */
  .hero {
    padding-top: var(--sp-8);
  }

  .hero__lede {
    font-size: 1.125rem;
  }

  /* Services header: single column */
  .services__header {
    grid-template-columns: 1fr;
    gap: var(--sp-7);
    margin-bottom: var(--sp-7);
  }

  /* Services item: collapse to 2-col then wrap */
  .services__item {
    grid-template-columns: 3.5rem 1fr;
    grid-template-rows: auto auto auto;
  }
  .services__item-num   {
    grid-row: 1;
    grid-column: 1;
  }
  .services__item-title {
    grid-row: 1;
    grid-column: 2;
  }
  .services__item-body  {
    grid-row: 2;
    grid-column: 1 / -1;
  }
  .services__item-estimate  {
    grid-row: 3;
    grid-column: 1 / -1;
    color: var(--fg-subtle);
  }
  .services__item-estimate:before {
    content: "Typical engagement:";
    display: inline-block;
    padding-right: .5rem;
  }

  /* Work: 2 columns */
  .work__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Standards: stack */
  .standards__inner {
    grid-template-columns: 1fr;
    gap: var(--sp-7);
  }

  /* Contact: stack */
  .contact__inner {
    grid-template-columns: 1fr;
    gap: var(--sp-7);
  }
  .contact__actions {
    padding-top: 0;
    flex-direction: row;
    flex-wrap: wrap;
  }
  .contact__heading {
    margin-bottom: var(--sp-7);
  }

  /* Footer: 2-col */
  .footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-6);
  }
  .footer__brand {
    grid-column: 1 / -1;
  }
}

/* -- Media queries — phone ------------------------------------------------- */
@media (max-width: 639px) {
  :root {
    --gutter: 1rem;
    --section-v: var(--sp-8);
  }

  /* Hero */
  .hero__lede {
    font-size: 1rem;
  }

  /* Work: single column */
  .work__grid {
    grid-template-columns: 1fr;
  }

  /* Footer: single column */
  .footer__inner {
    grid-template-columns: 1fr;
  }
  .footer__brand {
    grid-column: auto;
  }

  .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sp-2);
  }

  /* Buttons: allow wrap */
  .hero__actions {
    flex-direction: column;
    align-items: flex-start;
  }

  .contact__heading {
    margin-bottom: var(--sp-7);
  }
}