/* ============================================================
   graymatter — from ideas to value
   editorial advisory identity · mobile-first
   ============================================================ */

:root {
  /* palette */
  --ink:        #16151A;   /* deep warm charcoal */
  --ink-2:      #1D1C23;   /* raised charcoal */
  --ink-3:      #272531;   /* card surface on dark */
  --bone:       #ECEAE3;   /* warm off-white, cooled */
  --bone-2:     #E3E0D8;   /* dim bone */
  --lavender:   #9B97AD;   /* muted gray-lavender */
  --lavender-2: #6E6B7E;   /* dim lavender */
  --brass:      #B18A57;   /* muted brass accent */
  --brass-2:    #C6A272;   /* brass, lifted for dark bg */

  --line-dark:  rgba(155,151,173,.18);
  --line-light: rgba(22,21,26,.14);

  /* type */
  --serif: "Fraunces", Georgia, "Times New Roman", serif;
  --sans:  "Hanken Grotesk", system-ui, -apple-system, sans-serif;
  --mono:  "Space Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* metrics */
  --wrap: 1180px;
  --pad: clamp(1.25rem, 5vw, 4rem);
  --sect: clamp(4.5rem, 10vw, 8.5rem);
}

/* ── reset ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bone);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { margin: 0; font-weight: 420; letter-spacing: -.01em; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--pad);
}

/* offset anchor targets for the sticky nav */
#services, #approach, #contact { scroll-margin-top: 80px; }

.skip-link {
  position: absolute; left: 50%; top: -60px; transform: translateX(-50%);
  background: var(--ink); color: var(--bone); padding: .6rem 1rem;
  font-family: var(--mono); font-size: .8rem; border-radius: 2px; z-index: 100;
  transition: top .2s ease;
}
.skip-link:focus { top: .5rem; }

:focus-visible { outline: 2px solid var(--brass); outline-offset: 3px; }

/* ── shared type devices ───────────────────────────── */
.eyebrow {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--lavender-2);
  margin: 0 0 1.4rem;
}
.eyebrow--brass { color: var(--brass); }

.section__title {
  font-family: var(--serif);
  font-size: clamp(1.6rem, 4.2vw, 2.55rem);
  line-height: 1.12;
  max-width: 20ch;
}

/* ── nav ───────────────────────────────────────────── */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bone) 82%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line-light);
}
.nav__inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 66px;
}
.wordmark { display: inline-flex; align-items: center; gap: .6rem; }
.wordmark__mark {
  width: 12px; height: 12px; flex: none;
  background: var(--ink);
  border: 3px solid var(--brass);
  border-radius: 50%;
}
.wordmark__text {
  font-family: var(--serif);
  font-size: 1.28rem;
  font-weight: 500;
  letter-spacing: -.02em;
}
.nav__links { display: flex; align-items: center; gap: 1.1rem; }
.nav__links a:not(.nav__cta) { display: none; }
.nav__links a {
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--lavender-2);
  transition: color .2s ease;
}
.nav__links a:hover { color: var(--ink); }
.nav__cta {
  color: var(--ink) !important;
  border: 1px solid var(--line-light);
  padding: .5rem .95rem;
  border-radius: 2px;
  transition: border-color .2s ease, background .2s ease;
}
.nav__cta:hover { border-color: var(--brass); background: transparent; }

@media (min-width: 760px) {
  .nav__links { gap: 2rem; }
  .nav__links a:not(.nav__cta) { display: inline; }
}

/* ── buttons ───────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: var(--mono);
  font-size: .82rem;
  letter-spacing: .04em;
  padding: .85rem 1.5rem;
  border-radius: 2px;
  border: 1px solid transparent;
  transition: transform .18s ease, background .2s ease, border-color .2s ease, color .2s ease;
}
.btn--primary { background: var(--brass); color: #16130E; }
.btn--primary:hover { background: var(--brass-2); transform: translateY(-2px); }
.btn--ghost { border-color: rgba(236,234,227,.28); color: var(--bone); }
.btn--ghost:hover { border-color: var(--brass); color: #fff; }

/* ── hero ──────────────────────────────────────────── */
.hero {
  background: var(--ink);
  color: var(--bone);
  padding: clamp(3.5rem, 12vh, 7rem) 0 clamp(3rem, 8vh, 5rem);
  position: relative;
  overflow: hidden;
}
.hero::after {
  /* faint meridian atmosphere */
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(120% 90% at 85% -10%, rgba(177,138,87,.10), transparent 55%),
    linear-gradient(180deg, transparent, rgba(0,0,0,.15));
  pointer-events: none;
}
.hero__inner { position: relative; z-index: 1; }
.hero .eyebrow { color: var(--lavender); }
.hero__h {
  font-family: var(--serif);
  font-weight: 340;
  font-size: clamp(3rem, 12vw, 6.5rem);
  line-height: .98;
  letter-spacing: -.03em;
  margin: 0 0 1.6rem;
}
.hero__h span { display: block; }
.hero__h--accent { color: var(--brass-2); font-style: italic; font-weight: 420; }
.hero__sub {
  max-width: 46ch;
  font-size: clamp(1.05rem, 2.4vw, 1.28rem);
  line-height: 1.55;
  color: color-mix(in srgb, var(--bone) 80%, transparent);
}
.hero__actions {
  display: flex; flex-wrap: wrap; gap: .9rem;
  margin-top: 2.4rem;
}

/* corridor signature */
.corridor { margin-top: clamp(3rem, 8vh, 5rem); }
.corridor__line {
  display: block; height: 1px; width: 100%;
  background: linear-gradient(90deg, transparent, var(--line-dark) 12%, var(--line-dark) 88%, transparent);
  margin-bottom: 1.3rem;
}
.corridor__stops {
  display: flex; flex-wrap: wrap; gap: 1.6rem 3rem;
}
.stop { display: flex; flex-direction: column; gap: .3rem; }
.stop__city {
  font-family: var(--serif);
  font-size: 1.2rem;
  color: var(--bone);
}
.stop__coord {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--lavender-2);
}

/* ── sections base ─────────────────────────────────── */
.section { padding-block: var(--sect); }
.section--tight { padding-top: 0; }
.section--light { background: var(--bone); color: var(--ink); }
.section--dark  { background: var(--ink); color: var(--bone); }
.section--dark .eyebrow { color: var(--lavender); }
.section--dark .eyebrow--brass { color: var(--brass); }

.section__head { margin-bottom: clamp(2.5rem, 5vw, 3.75rem); }

/* ── what we do : advisory notes ───────────────────── */
.notes {
  display: grid;
  gap: 1px;
  background: var(--line-light);
  border: 1px solid var(--line-light);
}
.note {
  background: var(--bone);
  padding: clamp(1.75rem, 3.5vw, 2.75rem);
  position: relative;
  transition: background .25s ease, transform .25s ease;
}
.note::before {
  content: ""; position: absolute; left: 0; top: 0; height: 100%; width: 2px;
  background: var(--brass); transform: scaleY(0); transform-origin: top;
  transition: transform .3s ease;
}
.note:hover { background: #F2F0EA; }
.note:hover::before { transform: scaleY(1); }
.note__index {
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .12em;
  color: var(--brass);
  text-transform: uppercase;
}
.note__title {
  font-family: var(--serif);
  font-size: 1.5rem;
  margin: 1.1rem 0 .7rem;
}
.note__body { color: #43414B; max-width: 34ch; }

@media (min-width: 820px) {
  .notes { grid-template-columns: repeat(3, 1fr); }
}

/* ── who we work with ──────────────────────────────── */
.who { display: grid; gap: clamp(2rem, 5vw, 3.5rem); }
.who__head .section__title { max-width: 22ch; }
.who__list {
  border-top: 1px solid var(--line-light);
}
.who__list li {
  font-family: var(--serif);
  font-size: clamp(1.25rem, 3.2vw, 1.75rem);
  line-height: 1.25;
  color: var(--ink);
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--line-light);
  display: flex; align-items: baseline; gap: 1rem;
  transition: padding-left .25s ease, color .25s ease;
}
.who__list li::before {
  content: "→";
  font-family: var(--mono);
  font-size: .9rem;
  color: var(--brass);
  transform: translateY(-.15em);
}
.who__list li:hover { padding-left: .6rem; }

@media (min-width: 900px) {
  .who { grid-template-columns: 0.8fr 1.2fr; align-items: start; }
}

/* ── operating thesis ──────────────────────────────── */
.thesis__inner { max-width: 42ch; }
.thesis__h {
  font-family: var(--serif);
  font-weight: 340;
  font-size: clamp(2.4rem, 7vw, 4.5rem);
  line-height: 1.02;
  letter-spacing: -.025em;
  margin-bottom: 1.6rem;
}
.thesis__body {
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  line-height: 1.6;
  color: color-mix(in srgb, var(--bone) 78%, transparent);
  max-width: 52ch;
}

/* ── approach : steps ──────────────────────────────── */
.steps {
  border-top: 1px solid var(--line-light);
}
.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.25rem;
  padding: clamp(1.5rem, 3.5vw, 2.4rem) 0;
  border-bottom: 1px solid var(--line-light);
  align-items: start;
}
.step__num {
  font-family: var(--mono);
  font-size: .85rem;
  color: var(--brass);
  letter-spacing: .05em;
  padding-top: .45rem;
}
.step__title {
  font-family: var(--serif);
  font-size: clamp(1.35rem, 3.5vw, 2rem);
  margin-bottom: .35rem;
}
.step__body p { color: #43414B; max-width: 48ch; }

@media (min-width: 720px) {
  .step { grid-template-columns: 5rem 1fr; gap: 2.5rem; }
}

/* ── regions ───────────────────────────────────────── */
.regions__inner { display: grid; gap: clamp(2.5rem, 6vw, 4rem); }
.regions__h {
  font-family: var(--serif);
  font-weight: 340;
  font-size: clamp(2rem, 5.5vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: -.02em;
  margin-bottom: 1.4rem;
}
.regions__body {
  color: color-mix(in srgb, var(--bone) 76%, transparent);
  max-width: 44ch;
}
.regions__map {
  border: 1px solid var(--line-dark);
  padding: clamp(2rem, 5vw, 3rem) clamp(1.5rem, 4vw, 2.5rem);
  background: linear-gradient(180deg, var(--ink-2), var(--ink));
}
.meridian {
  position: relative;
  height: 190px;
  border-left: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}
.meridian__dot {
  position: absolute; bottom: 0; left: var(--x);
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--brass);
  box-shadow: 0 0 0 5px rgba(177,138,87,.14);
}
.meridian__dot::before {
  /* rising line */
  content: ""; position: absolute; left: 50%; bottom: 4px;
  width: 1px; height: 60px; transform: translateX(-.5px);
  background: linear-gradient(180deg, rgba(177,138,87,.5), transparent);
}
.meridian__dot em {
  position: absolute; bottom: 74px; left: 50%; transform: translateX(-50%);
  font-family: var(--mono); font-style: normal; font-size: .72rem;
  letter-spacing: .08em; color: var(--lavender); white-space: nowrap;
}
.meridian__label {
  position: absolute; bottom: -1.6rem; left: 0;
  font-family: var(--mono); font-size: .68rem; letter-spacing: .1em;
  color: var(--lavender-2);
}
.meridian__label--end { left: auto; right: 0; }

@media (min-width: 900px) {
  .regions__inner { grid-template-columns: 1fr 1fr; align-items: center; }
}

/* ── contact ───────────────────────────────────────── */
.contact { border-top: 1px solid var(--line-dark); }
.contact__grid { display: grid; gap: clamp(2.75rem, 6vw, 5rem); }
.contact__h {
  font-family: var(--serif);
  font-weight: 340;
  font-size: clamp(1.9rem, 5vw, 3rem);
  line-height: 1.08;
  letter-spacing: -.02em;
  margin-bottom: 1.3rem;
  max-width: 16ch;
}
.contact__body {
  color: color-mix(in srgb, var(--bone) 76%, transparent);
  max-width: 42ch; margin-bottom: 2.25rem;
}
.contact__or {
  font-family: var(--mono); font-size: .72rem; letter-spacing: .14em;
  text-transform: uppercase; color: var(--lavender-2); margin-bottom: .5rem;
}
.contact__mail {
  display: inline-block;
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(1.3rem, 3.5vw, 1.8rem);
  color: var(--brass-2);
  border-bottom: 1px solid rgba(198,162,114,.35);
  padding-bottom: .15rem;
  transition: border-color .2s ease, color .2s ease;
}
.contact__mail:hover { color: #fff; border-color: var(--brass-2); }
.contact__loc {
  font-family: var(--mono); font-size: .72rem; letter-spacing: .12em;
  color: var(--lavender-2); margin-top: 2rem;
}

/* form */
.form { display: grid; gap: 1.5rem; align-content: start; }
.form__trap { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.field { display: grid; gap: .55rem; }
.field label {
  font-family: var(--mono); font-size: .72rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--lavender);
}
.field__opt { color: var(--lavender-2); text-transform: none; letter-spacing: .04em; }
.field input,
.field select,
.field textarea {
  width: 100%;
  font-family: var(--sans);
  font-size: 1rem;
  color: var(--bone);
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line-dark);
  padding: .55rem 0;
  border-radius: 0;
  transition: border-color .2s ease;
  -webkit-appearance: none;
  appearance: none;
}
.field textarea { resize: vertical; min-height: 3.5rem; line-height: 1.5; }
.field select {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path d='M1 1l5 5 5-5' fill='none' stroke='%23B18A57' stroke-width='1.5'/></svg>");
  background-repeat: no-repeat;
  background-position: right .1rem center;
  padding-right: 1.5rem;
  color: var(--bone);
}
.field select option { color: #16151A; background: var(--bone); }
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-bottom-color: var(--brass);
}
.field input::placeholder,
.field textarea::placeholder { color: var(--lavender-2); }
.form__submit { justify-self: start; margin-top: .5rem; cursor: pointer; }

@media (min-width: 880px) {
  .contact__grid { grid-template-columns: 1fr 1fr; align-items: start; }
}

/* ── footer ────────────────────────────────────────── */
.footer {
  background: var(--ink);
  color: var(--lavender);
  padding-block: clamp(2.5rem, 6vw, 4rem) 2rem;
  border-top: 1px solid var(--line-dark);
}
.footer__inner {
  display: grid; gap: 1.75rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--line-dark);
}
.footer__word {
  color: var(--bone); font-size: 1.35rem; display: block; margin-bottom: .35rem;
}
.footer__tag {
  font-family: var(--serif); font-style: italic; color: var(--lavender);
}
.footer__meta { display: flex; flex-direction: column; gap: .5rem; }
.footer__loc { font-family: var(--mono); font-size: .78rem; letter-spacing: .1em; }
.footer__meta a { transition: color .2s ease; }
.footer__meta a:hover { color: var(--brass-2); }
.footer__base {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem;
  margin-top: 2rem;
  font-family: var(--mono); font-size: .7rem; letter-spacing: .08em;
  color: var(--lavender-2);
}
.footer__credit { color: var(--lavender-2); transition: color .2s ease; }
.footer__credit:hover { color: var(--brass-2); }

@media (min-width: 700px) {
  .footer__inner { grid-template-columns: 1fr auto; align-items: end; }
  .footer__meta { align-items: flex-end; text-align: right; }
}

/* ── reveal motion ─────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1);
  transition-delay: calc(var(--i, 0) * 90ms);
}
.reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn, .note, .who__list li { transition: none; }
  *, *::before, *::after { animation: none !important; }
}