/* ── Reset & Base ──────────────────────────────────────────── */

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

:root {
  --color-paper:      #ffffff;
  --color-paper-alt:  #f5f5f5;
  --color-ink:        #1a1814;
  --color-ink-mid:    #4a443e;
  --color-ink-faint:  #8a837a;
  --color-rule:       #c4bdb0;

  --font-display: 'DM Sans', system-ui, sans-serif;
  --font-sans:    system-ui, -apple-system, sans-serif;

  --max-width: 1100px;
  --max-width-narrow: 660px;
  --section-pad: 6rem;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-ink-mid);
  background: var(--color-paper);
  -webkit-font-smoothing: antialiased;
}

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

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


/* ── Layout ───────────────────────────────────────────────── */

.container {
  width: 88%;
  max-width: var(--max-width);
  margin-inline: auto;
}

.container--narrow {
  max-width: var(--max-width-narrow);
}

.section {
  padding-block: var(--section-pad);
}

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


/* ── Typography ───────────────────────────────────────────── */

.section-label {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-ink-faint);
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 600;
  color: var(--color-ink);
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.section-sub {
  font-size: 0.95rem;
  color: var(--color-ink-faint);
  max-width: 54ch;
  margin-bottom: 3.5rem;
  line-height: 1.75;
}


/* ── Navigation ───────────────────────────────────────────── */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--color-rule);
  backdrop-filter: blur(6px);
}

.nav {
  width: 88%;
  max-width: var(--max-width);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 1.1rem;
  position: relative;
}

.nav-brand {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-ink);
}

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

.nav-links a {
  font-size: 0.78rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--color-ink-faint);
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--color-ink);
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-ink);
}


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

.hero {
  padding-block: 9rem 8rem;
  border-bottom: 1px solid var(--color-rule);
  background-image: url('../assets/images/1-52.jpg');
  background-size: cover;
  background-position: center;
}

.hero-inner {
  max-width: 800px;
  position: relative;
}


.eyebrow {
  font-size: 0.72rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 2.5rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 9vw, 7.5rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: #ffffff;
  margin-bottom: 2rem;
}

.hero-sub {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.85);
  max-width: 52ch;
  margin-bottom: 3.5rem;
  line-height: 1.8;
}

.btn {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: #ffffff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.6);
  padding-bottom: 0.15rem;
  transition: color 0.2s, border-color 0.2s;
}

.btn:hover {
  color: rgba(255, 255, 255, 0.7);
  border-color: rgba(255, 255, 255, 0.3);
}


/* ── Service Cards ────────────────────────────────────────── */

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.card {
  padding: 2.5rem 2.5rem 2.5rem 0;
}

.card-num {
  font-family: var(--font-display);
  font-size: 0.82rem;
  color: var(--color-ink-faint);
  margin-bottom: 1.4rem;
}

.card h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 0.8rem;
  line-height: 1.35;
}

.card p {
  font-size: 0.875rem;
  color: var(--color-ink-mid);
  line-height: 1.75;
}


/* ── Education Bar ────────────────────────────────────────── */

.edu-bar {
  padding-block: 1rem;
  border-bottom: 1px solid var(--color-rule);
}

.edu-bar p {
  font-size: 0.8rem;
  color: var(--color-ink-faint);
  line-height: 1.8;
}


/* ── Client Logos ─────────────────────────────────────────── */

.client-logos {
  padding-block: 2.5rem;
  border-bottom: 1px solid var(--color-rule);
}

.client-logos-label {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-ink-faint);
  margin-bottom: 2rem;
}

.client-logos-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2.5rem 3.5rem;
}

.client-logos-row img {
  height: 36px;
  width: auto;
  opacity: 0.85;
  transition: opacity 0.2s;
}

.client-logos-row img:hover {
  opacity: 1;
}


/* ── Past Work ────────────────────────────────────────────── */

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

.work-item {
  display: grid;
  grid-template-columns: 148px 1fr 260px;
  gap: 2.5rem;
  padding-block: 2.5rem;
  border-top: 1px solid var(--color-rule);
  align-items: start;
}

.work-item:last-child {
  border-bottom: 1px solid var(--color-rule);
}

.work-meta {
  padding-top: 0.15rem;
}

.work-tag {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-faint);
  margin-bottom: 0.35rem;
}

.work-year {
  display: block;
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--color-ink-faint);
}

.work-body h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 0.6rem;
  line-height: 1.4;
}

.work-body p {
  font-size: 0.9rem;
  color: var(--color-ink-mid);
  max-width: 64ch;
  line-height: 1.75;
}

.work-body h3 a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: text-decoration 0.2s;
}

.work-body h3 a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 3px;
  outline: 2px solid var(--color-ink-faint);
  outline-offset: 2px;
  border-radius: 1px;
}

.work-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 3px;
}


/* ── Interactive Viz Feature Link ────────────────────────── */

.viz-feature {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  margin-bottom: 2rem;
  border: 1px solid var(--color-rule);
  border-radius: 4px;
  text-decoration: none;
  transition: background 0.2s, border-color 0.2s;
}

.viz-feature:hover {
  background: var(--color-paper-alt);
  border-color: var(--color-ink-faint);
}

.viz-feature-label {
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-ink-faint);
  white-space: nowrap;
  flex-shrink: 0;
}

.viz-feature-title {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-ink);
  flex: 1;
}

.viz-feature-arrow {
  font-size: 1rem;
  color: var(--color-ink-faint);
  flex-shrink: 0;
  transition: color 0.2s;
}

.viz-feature:hover .viz-feature-arrow {
  color: var(--color-ink);
}


/* ── Maps Grid ────────────────────────────────────────────── */

.map-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.map-item {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.map-item img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 3px;
  transition: opacity 0.2s;
}

.map-item img:hover {
  opacity: 0.85;
}

.map-item figcaption {
  font-size: 0.75rem;
  color: var(--color-ink-faint);
  line-height: 1.4;
}

.map-context {
  display: block;
  font-size: 0.68rem;
  color: var(--color-ink-faint);
  opacity: 0.7;
  margin-top: 0.2rem;
}


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

.email-link {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-ink);
  border-bottom: 2px solid var(--color-ink);
  padding-bottom: 0.1rem;
  transition: opacity 0.2s;
}

.email-link:hover {
  opacity: 0.7;
}


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

.site-footer {
  padding-block: 2rem;
  border-top: 1px solid var(--color-rule);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-footer p {
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--color-ink-faint);
}

.footer-coord {
  font-family: var(--font-display);
  letter-spacing: 0.02em;
}


/* ── Lightbox ─────────────────────────────────────────────── */

.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 500;
  background: rgba(0, 0, 0, 0.88);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 1rem;
  padding: 2rem;
}

.lightbox.is-open {
  display: flex;
}

.lightbox-img {
  max-width: 90vw;
  max-height: 82vh;
  object-fit: contain;
  border-radius: 3px;
}

.lightbox-caption {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.6);
  text-align: center;
}

.lightbox-close {
  position: absolute;
  top: 1.25rem;
  right: 1.5rem;
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.7);
  font-size: 2rem;
  line-height: 1;
  cursor: pointer;
  transition: color 0.2s;
}

.lightbox-close:hover {
  color: #ffffff;
}


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

@media (max-width: 820px) {
  .map-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .card {
    border-bottom: 1px solid var(--color-rule);
    padding: 2rem 0;
  }

  .card:last-child {
    border-bottom: none;
  }

  .work-item {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .work-image {
    aspect-ratio: 16 / 9;
  }
}

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

  .hero {
    padding-block: 5rem 4rem;
  }

  .nav-hamburger {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(255, 255, 255, 0.97);
    border-bottom: 1px solid var(--color-rule);
    padding: 0 6%;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.25s ease, opacity 0.2s ease;
  }

  .nav-links li {
    padding-block: 0.75rem;
    border-bottom: 1px solid var(--color-rule);
  }

  .nav-links li:last-child {
    border-bottom: none;
  }

  .nav.is-open .nav-links {
    max-height: 300px;
    opacity: 1;
  }

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

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
  }
}