@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@300;400;500;600&family=IBM+Plex+Sans:wght@200;300;400;500;600;700&display=swap');

:root {
  --black: #161513;
  --charcoal: #2b2a27;
  --stone: #6f6c66;
  --sand: #d9d4c9;
  --cream: #f6f4ee;
  --white: #ffffff;
  --line: rgba(22,21,19,0.12);
  --ease: cubic-bezier(0.65, 0, 0.35, 1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--cream);
  color: var(--black);
  font-family: 'IBM Plex Mono', 'Courier New', monospace;
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .display {
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 400;
  letter-spacing: 0;
  margin: 0;
}

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

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

.wrap {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
}

/* ---------- Header / Nav ---------- */

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 40px;
  color: var(--black);
}

.logo-mark {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--cream);
  color: var(--black);
  transition: width 0.45s var(--ease);
}

.logo-frame {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.logo-frame--solid {
  border: 1.5px solid currentColor;
  transition: opacity 0.25s ease;
}

.logo-frame--corners {
  opacity: 0;
  transition: opacity 0.3s ease 0.15s;
}

.logo-mark:hover .logo-frame--solid {
  opacity: 0;
  transition-delay: 0s;
}

.logo-mark:hover .logo-frame--corners {
  opacity: 1;
}

.logo-corner {
  position: absolute;
  width: 9px;
  height: 9px;
}

.logo-corner--tl { top: -1.5px; left: -1.5px; border-top: 1.5px solid currentColor; border-left: 1.5px solid currentColor; }
.logo-corner--tr { top: -1.5px; right: -1.5px; border-top: 1.5px solid currentColor; border-right: 1.5px solid currentColor; }
.logo-corner--bl { bottom: -1.5px; left: -1.5px; border-bottom: 1.5px solid currentColor; border-left: 1.5px solid currentColor; }
.logo-corner--br { bottom: -1.5px; right: -1.5px; border-bottom: 1.5px solid currentColor; border-right: 1.5px solid currentColor; }

.logo-compact,
.logo-full {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  white-space: nowrap;
  font-family: 'IBM Plex Sans', sans-serif;
  font-weight: 300;
  letter-spacing: 0.06em;
  transition: opacity 0.2s ease;
}

.logo-compact {
  font-size: 0.92rem;
  opacity: 1;
}

.logo-full {
  font-size: 0.98rem;
  opacity: 0;
  transition-delay: 0.18s;
}

.logo-mark:hover {
  width: 128px;
}

.logo-mark:hover .logo-compact {
  opacity: 0;
  transition-delay: 0s;
}

.logo-mark:hover .logo-full {
  opacity: 1;
}

.site-header nav {
  display: flex;
  gap: 36px;
}

@media (min-width: 901px) {
  .site-header nav {
    display: none;
  }
}

.site-header nav a {
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding-bottom: 3px;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease);
}

.site-header nav a:hover,
.site-header nav a.active {
  border-bottom-color: currentColor;
}

.site-header--photo {
  mix-blend-mode: normal;
  color: var(--white);
}

.site-header--photo nav a {
  text-shadow: 0 1px 5px rgba(0,0,0,0.55);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--black);
  font-size: 1rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
}

.site-header--photo .nav-toggle {
  color: var(--white);
  text-shadow: 0 1px 5px rgba(0,0,0,0.55);
}

/* ---------- Page transition ---------- */

.page-transition {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--cream);
  opacity: 1;
  transition: opacity 0.4s ease;
}

.page-transition.revealed {
  opacity: 0;
  pointer-events: none;
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  height: 100vh;
  min-height: 560px;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  overflow: hidden;
  background: var(--black);
}

.hero img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-sky-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0.06) 0%, rgba(0,0,0,0.04) 55%, rgba(0,0,0,0.4) 100%);
}

.hero-logo {
  position: absolute;
  z-index: 2;
  left: 37.42%;
  top: calc(39vh - 7.415vw);
  width: 4.96vw;
  height: 4.96vw;
  background: transparent;
  color: var(--white);
  opacity: 0;
  animation: hero-mark-in 1s ease 0.2s forwards;
}

.hero-logo .logo-frame--solid {
  border-width: 1.8px;
}

.hero-logo .logo-corner {
  width: calc(4.96vw * 0.22);
  height: calc(4.96vw * 0.22);
}

.hero-logo .logo-corner--tl,
.hero-logo .logo-corner--tr,
.hero-logo .logo-corner--bl,
.hero-logo .logo-corner--br {
  border-width: 1.8px;
}

.hero-logo .logo-compact,
.hero-logo .logo-full {
  font-family: 'IBM Plex Sans', sans-serif;
  font-weight: 400;
  letter-spacing: 0.06em;
  font-size: 1.75vw;
}

.hero-logo.logo-mark:hover,
.hero-logo.is-tapped {
  width: 16.67vw;
}

.hero-logo.is-tapped .logo-frame--solid { opacity: 0; }
.hero-logo.is-tapped .logo-frame--corners { opacity: 1; }
.hero-logo.is-tapped .logo-compact { opacity: 0; }
.hero-logo.is-tapped .logo-full { opacity: 1; }

@keyframes hero-mark-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ---------- Sections ---------- */

section { padding: 120px 0; }

.section-label {
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--stone);
  margin-bottom: 22px;
}

/* ---------- Project tile ---------- */

.project-tile {
  display: block;
  cursor: pointer;
  transition: filter 0.5s ease, opacity 0.5s ease;
}

.tile-frame {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--sand);
  aspect-ratio: 3 / 2;
}

.tile-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%) contrast(1.02);
  transition: transform 1s var(--ease), filter 0.6s ease;
}

.project-tile:hover .tile-photo {
  transform: scale(1.05);
  filter: grayscale(0%) saturate(1.05) contrast(1.04);
}

.tile-caption {
  display: block;
  margin-top: 10px;
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 500;
  font-size: 0.8rem;
  letter-spacing: 0.03em;
  color: var(--charcoal);
  transition: color 0.3s ease;
}

.project-tile:hover .tile-caption {
  color: var(--black);
}

/* ---------- Agency section ---------- */

.agency {
  border-top: 1px solid var(--line);
  padding-top: 90px;
}

.agency-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 60px;
  align-items: start;
}

.agency-title {
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  margin: 0;
}

.agency-body p {
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--charcoal);
  margin: 0 0 24px;
}

.agency-awards-label {
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--stone);
  margin: 0 0 14px;
}

.agency-awards {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.agency-awards li {
  font-size: 0.86rem;
  line-height: 1.55;
  color: var(--charcoal);
  padding-left: 18px;
  position: relative;
}

.agency-awards li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--stone);
}

/* ---------- Projects grid page ---------- */

.projects-hero {
  padding: 90px 0 8px;
}

.projects-hero h1 {
  font-size: clamp(1.7rem, 3vw, 2.3rem);
}

.project-group {
  padding: 0 0 16px;
}

.category-label {
  display: block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--charcoal);
  margin: 0 0 8px;
  border-bottom: 1px solid transparent;
  cursor: default;
  transition: border-color 0.3s ease, color 0.3s ease;
}

.category-label:hover {
  color: var(--black);
  border-bottom-color: var(--black);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px 20px;
}

body.hover-logements .project-tile[data-group="equipements"],
body.hover-equipements .project-tile[data-group="logements"] {
  filter: blur(5px) brightness(0.6);
  opacity: 0.55;
}

/* ---------- Project detail ---------- */

.project-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  grid-template-areas:
    "sidebar photos"
    "sidebar next";
  align-items: start;
  padding-top: 28px;
}

.project-sidebar {
  grid-area: sidebar;
  position: sticky;
  top: 28px;
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  display: flex;
  flex-direction: column;
  padding: 90px 32px 60px 32px;
}

.project-sidebar::-webkit-scrollbar {
  display: none;
}

.project-back {
  display: inline-block;
  font-size: 0.64rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--stone);
  margin-top: -4px;
  margin-bottom: 16px;
}
.project-back:hover { color: var(--black); }

.project-title {
  font-size: clamp(1.2rem, 1.6vw, 1.6rem);
  font-weight: 300;
  line-height: 1.15;
  margin-bottom: 20px;
}

.project-title--mobile {
  display: none;
}

.project-meta {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--stone);
  margin-bottom: 26px;
}

.project-photos {
  grid-area: photos;
  min-width: 0;
  padding: 0 32px;
  display: flex;
  flex-direction: column;
  gap: 3mm;
}

.project-photo {
  margin: 0;
}

.project-photo img {
  width: 100%;
  display: block;
}

.project-description {
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.project-description-section h3 {
  font-size: 0.54rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--stone);
  font-weight: 400;
  margin-bottom: 2px;
}

.project-description-section p {
  margin: 0;
  font-size: 0.7rem;
  line-height: 1.45;
  color: var(--charcoal);
}

.project-plan-figure {
  margin: 26px 0 0 0;
}

.project-plan-figure + .project-plan-figure {
  margin-top: 16px;
}

.project-plan-label {
  font-size: 0.54rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--stone);
  margin-bottom: 5px;
}

.project-plan {
  width: 100%;
  background: var(--cream);
  cursor: zoom-in;
  transition: opacity 0.25s ease;
}

.project-plan:hover {
  opacity: 0.8;
}

.plan-lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: rgba(22, 21, 19, 0.94);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.plan-lightbox.open {
  opacity: 1;
  pointer-events: auto;
}

.plan-lightbox img {
  max-width: 100%;
  max-height: 100%;
  background: var(--cream);
  cursor: zoom-out;
}

.project-next {
  grid-area: next;
  margin-top: 40px;
  padding: 70px 40px 90px 0;
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.project-next-label {
  display: inline-block;
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--stone);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, color 0.3s ease;
}

.project-next:hover .project-next-label {
  color: var(--black);
  border-bottom-color: currentColor;
}

.project-next-title {
  font-family: 'IBM Plex Mono', monospace;
  font-size: clamp(1.4rem, 2.6vw, 2rem);
}

/* ---------- Footer ---------- */

.site-footer {
  background: var(--cream);
  color: var(--charcoal);
  padding: 32px 0 20px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.footer-col-label {
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--stone);
  margin-bottom: 8px;
}

.footer-col a, .footer-col p {
  display: block;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--charcoal);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  padding-top: 16px;
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: var(--stone);
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .wrap { padding: 0 22px; }
  .site-header { padding: 22px; }
  .site-header nav {
    position: fixed;
    top: 74px; right: 22px;
    height: auto;
    width: auto;
    min-width: 170px;
    background: var(--sand);
    box-shadow: 0 14px 34px rgba(22,21,19,0.18);
    border-radius: 4px;
    flex-direction: column;
    align-items: flex-end;
    justify-content: center;
    gap: 18px;
    padding: 24px 22px;
    transform-origin: top right;
    transform: scale(0.92) translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s var(--ease), opacity 0.25s ease;
    mix-blend-mode: normal;
  }
  .site-header nav.open {
    transform: scale(1) translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .site-header nav a { color: var(--black); }
  .site-header { mix-blend-mode: normal; background: transparent; }

  .projects-grid { grid-template-columns: repeat(2, 1fr); gap: 24px 16px; }
  .agency-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-top { grid-template-columns: 1fr; gap: 36px; }
  .footer-bottom { flex-direction: column; gap: 10px; }

  .hero-logo {
    left: 22px;
    top: 64px;
    width: clamp(48px, 12vw, 76px);
    height: clamp(48px, 12vw, 76px);
  }

  .hero-logo .logo-frame--solid,
  .hero-logo .logo-corner--tl,
  .hero-logo .logo-corner--tr,
  .hero-logo .logo-corner--bl,
  .hero-logo .logo-corner--br {
    border-width: 1.5px;
  }

  .hero-logo .logo-corner {
    width: calc(clamp(48px, 12vw, 76px) * 0.22);
    height: calc(clamp(48px, 12vw, 76px) * 0.22);
  }

  .hero-logo .logo-compact,
  .hero-logo .logo-full {
    font-size: 0.92rem;
  }

  .hero-logo.logo-mark:hover,
  .hero-logo.is-tapped {
    width: clamp(154px, 38vw, 243px);
  }

  .project-layout {
    display: flex;
    flex-direction: column;
    padding-top: 90px;
  }
  .project-title--mobile {
    display: block;
    order: 0;
    margin: 0 22px 22px;
  }
  .project-photos { order: 1; padding: 0 0; gap: 3mm; }
  .project-sidebar {
    order: 2;
    position: static;
    width: 100%;
    max-height: none;
    overflow-y: visible;
    padding: 0 22px 40px;
  }
  .project-sidebar .project-title { display: none; }
  .project-next { order: 3; margin-top: 0; padding: 50px 22px 70px; }
  .project-back { margin-bottom: 24px; }
  .plan-lightbox { padding: 24px; }
}