/* ============================================================
   H'ABT ARCHITECTURE · Biologie de l'habitat
   Feuille de style du site vitrine statique
   ============================================================ */

:root {
  --ink: #1b1a17;
  --ink-soft: #46443e;
  --paper: #f6f4ef;
  --paper-deep: #edeae2;
  --stone: #8b8779;
  --line: #d9d5ca;
  --moss: #63734a;
  --moss-deep: #4c5a38;
  --white: #fdfcfa;

  --font-display: "Cormorant Garamond", Georgia, serif;
  --font-body: "Manrope", "Segoe UI", sans-serif;

  --w-max: 1360px;
  --pad: clamp(1.25rem, 4vw, 4rem);
  --ease: cubic-bezier(.22, .8, .26, .99);
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
::selection { background: var(--moss); color: var(--white); }

/* ---------- typographie ---------- */

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.08;
  margin: 0;
}

.display {
  font-size: clamp(2.6rem, 7vw, 5.6rem);
  letter-spacing: -0.015em;
}

.display em, h2 em {
  font-style: italic;
  font-weight: 400;
  color: var(--moss);
}

h2.section-title {
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  max-width: 18em;
}

.overline {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--stone);
}

.lead {
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 46em;
}

/* ---------- structure ---------- */

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

section { padding-block: clamp(4rem, 9vw, 8.5rem); }

.section-head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.5rem 3rem;
  align-items: baseline;
  margin-bottom: clamp(2.5rem, 5vw, 4.5rem);
}

.section-num {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.15rem;
  color: var(--moss);
  white-space: nowrap;
}

.section-num::after {
  content: "";
  display: inline-block;
  width: 3.5rem;
  height: 1px;
  background: var(--line);
  vertical-align: middle;
  margin-left: 1rem;
}

.rule { border: 0; border-top: 1px solid var(--line); margin: 0; }

/* ---------- header ---------- */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 90;
  transition: background .45s var(--ease), box-shadow .45s var(--ease);
}

.site-header.solid {
  background: rgba(246, 244, 239, .92);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--line);
}

.site-header .bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding-block: 1.1rem;
  transition: padding .45s var(--ease);
}

.site-header.solid .bar { padding-block: .7rem; }

.brand { line-height: 1.25; }

.brand strong {
  font-family: var(--font-body);
  font-weight: 800;
  font-size: 1.02rem;
  letter-spacing: 0.14em;
}

.brand span {
  display: block;
  font-size: 0.64rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--stone);
}

/* header sur image sombre */
.on-hero:not(.solid) { color: var(--white); }
.on-hero:not(.solid) .brand span { color: rgba(253, 252, 250, .75); }

.site-nav { display: flex; gap: 2.2rem; align-items: center; }

.site-nav a {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  position: relative;
  padding-block: .3rem;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .35s var(--ease);
}

.site-nav a:hover::after,
.site-nav a[aria-current="page"]::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  color: inherit;
  cursor: pointer;
  padding: .5rem;
}

.nav-toggle .lines,
.nav-toggle .lines::before,
.nav-toggle .lines::after {
  content: "";
  display: block;
  width: 26px;
  height: 2px;
  background: currentColor;
  transition: transform .3s var(--ease), opacity .3s;
}

.nav-toggle .lines { position: relative; }
.nav-toggle .lines::before { position: absolute; top: -8px; }
.nav-toggle .lines::after { position: absolute; top: 8px; }

@media (max-width: 860px) {
  .nav-toggle { display: block; z-index: 95; }
  .site-nav {
    position: fixed;
    inset: 0;
    flex-direction: column;
    justify-content: center;
    gap: 2.4rem;
    background: var(--ink);
    color: var(--paper);
    opacity: 0;
    pointer-events: none;
    transition: opacity .4s var(--ease);
  }
  body.nav-open .site-nav { opacity: 1; pointer-events: auto; }
  body.nav-open .site-header { color: var(--paper); }
  body.nav-open .nav-toggle .lines { transform: rotate(45deg); }
  body.nav-open .nav-toggle .lines::before { transform: rotate(-90deg); top: 0; }
  body.nav-open .nav-toggle .lines::after { opacity: 0; }
  body.nav-open { overflow: hidden; }
  .site-nav a { font-size: 1rem; }
}

/* ---------- hero ---------- */

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  color: var(--white);
  padding: 0;
  isolation: isolate;
}

.hero-media, .hero-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(180deg, rgba(20, 20, 17, .38) 0%, rgba(20, 20, 17, .05) 38%, rgba(20, 20, 17, .72) 100%);
}

.hero .wrap {
  position: relative;
  z-index: 2;
  width: 100%;
  padding-block: clamp(3rem, 8vh, 6rem);
}

.hero .overline { color: rgba(253, 252, 250, .8); }

.hero-sub {
  max-width: 34em;
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  color: rgba(253, 252, 250, .88);
}

.hero-footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  margin-top: clamp(2rem, 5vh, 3.5rem);
  padding-top: 1.6rem;
  border-top: 1px solid rgba(253, 252, 250, .28);
}

.hero-caption {
  font-size: .72rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: rgba(253, 252, 250, .65);
}

.scroll-cue {
  display: inline-flex;
  align-items: center;
  gap: .8rem;
  font-size: .72rem;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: rgba(253, 252, 250, .85);
}

.scroll-cue::after {
  content: "";
  width: 1px;
  height: 2.6rem;
  background: currentColor;
  animation: cue 2.2s var(--ease) infinite;
  transform-origin: top;
}

@keyframes cue {
  0% { transform: scaleY(0); opacity: 0; }
  35% { transform: scaleY(1); opacity: 1; }
  100% { transform: scaleY(1) translateY(1.2rem); opacity: 0; }
}

/* ---------- stats ---------- */

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.stat {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: clamp(1.4rem, 3vw, 2.4rem);
}

.stat b {
  display: block;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.4rem, 4.5vw, 3.6rem);
  line-height: 1;
}

.stat b sup { font-size: .45em; color: var(--moss); }

.stat span {
  display: block;
  margin-top: .6rem;
  font-size: .78rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--stone);
}

/* ---------- grilles projets ---------- */

.grid {
  display: grid;
  gap: clamp(1.2rem, 2.6vw, 2.4rem);
  grid-template-columns: repeat(12, 1fr);
}

.card { grid-column: span 4; }

.card.wide { grid-column: span 8; }
.card.tall { grid-column: span 4; }

@media (max-width: 1000px) {
  .card, .card.wide { grid-column: span 6; }
}
@media (max-width: 620px) {
  .card, .card.wide { grid-column: span 12; }
}

.card a { display: block; }

.card figure {
  margin: 0;
  position: relative;
  overflow: hidden;
  background: var(--paper-deep);
  aspect-ratio: 4 / 3;
}

.card.wide figure { aspect-ratio: 16 / 9.5; }

.card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.1s var(--ease), filter 1.1s var(--ease);
}

.card a:hover img { transform: scale(1.045); }

.card figcaption {
  position: absolute;
  inset: auto 0 0 0;
  padding: 2.2rem 1.2rem .9rem;
  background: linear-gradient(180deg, transparent, rgba(20, 20, 17, .55));
  color: var(--white);
  font-size: .7rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity .45s var(--ease), transform .45s var(--ease);
}

.card a:hover figcaption { opacity: 1; transform: none; }

.card-meta { margin-top: .9rem; }

.card-meta h3 {
  font-size: 1.35rem;
  font-weight: 500;
}

.card-meta p {
  margin: .25rem 0 0;
  font-size: .74rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--stone);
}

.badge {
  display: inline-block;
  font-size: .62rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--moss-deep);
  border: 1px solid var(--moss);
  border-radius: 2rem;
  padding: .15rem .6rem;
  margin-left: .5rem;
  vertical-align: middle;
}

/* ---------- filtres ---------- */

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  margin-bottom: clamp(2rem, 4vw, 3.2rem);
}

.filter-btn {
  font-family: var(--font-body);
  font-size: .74rem;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: none;
  border: 1px solid var(--line);
  border-radius: 2rem;
  padding: .55rem 1.25rem;
  cursor: pointer;
  transition: all .3s var(--ease);
}

.filter-btn:hover { border-color: var(--stone); }

.filter-btn.active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.filter-count {
  color: var(--stone);
  font-size: .8rem;
  margin-left: auto;
  align-self: center;
  letter-spacing: .08em;
}

.pgrid {
  display: grid;
  gap: 2rem 1.6rem;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.pcard.hidden { display: none; }

/* ---------- sections sombres ---------- */

.dark {
  background: var(--ink);
  color: var(--paper);
}

.dark .overline, .dark .stat span { color: var(--stone); }
.dark .lead { color: rgba(246, 244, 239, .82); }
.dark .stats, .dark .stat { border-color: #33322c; }

/* ---------- démarche : liste principes ---------- */

.principles { display: grid; gap: 0; margin-top: 1rem; }

.principle {
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: 1.5rem;
  padding: 1.8rem 0;
  border-top: 1px solid var(--line);
  align-items: baseline;
}

.dark .principle { border-color: #33322c; }

.principle i {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.3rem;
  color: var(--moss);
}

.principle h3 { font-size: 1.55rem; margin-bottom: .4rem; }

.principle p { margin: 0; color: var(--ink-soft); max-width: 52em; }

.dark .principle p { color: rgba(246, 244, 239, .75); }

/* ---------- deux colonnes édito ---------- */

.duo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 6vw, 6rem);
  align-items: center;
}

@media (max-width: 900px) { .duo { grid-template-columns: 1fr; } }

.duo figure { margin: 0; overflow: hidden; }
.duo figure img { width: 100%; height: 100%; object-fit: cover; }

/* ---------- fiche projet ---------- */

.project-hero {
  position: relative;
  min-height: 68svh;
  display: flex;
  align-items: flex-end;
  color: var(--white);
  isolation: isolate;
  padding: 0;
}

.project-hero .hero-media::after {
  background: linear-gradient(180deg, rgba(20,20,17,.42) 0%, rgba(20,20,17,.1) 40%, rgba(20,20,17,.68) 100%);
}

.project-hero .wrap { position: relative; z-index: 2; width: 100%; padding-block: clamp(2.5rem, 6vh, 4.5rem); }

.project-title { font-size: clamp(2.2rem, 5.5vw, 4.4rem); max-width: 16em; }

.project-meta {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 2rem;
  margin-top: 1.2rem;
  font-size: .74rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: rgba(253, 252, 250, .82);
}

.project-body { padding-block: clamp(3rem, 7vw, 5.5rem); }

.project-text {
  max-width: 46em;
  font-size: 1.06rem;
  color: var(--ink-soft);
}

/* galerie fiche projet */
.gallery {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  margin-top: clamp(2rem, 5vw, 3.5rem);
}

.gallery a {
  display: block;
  overflow: hidden;
  background: var(--paper-deep);
  aspect-ratio: 4 / 3;
  cursor: zoom-in;
}

.gallery img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .9s var(--ease);
}

.gallery a:hover img { transform: scale(1.05); }

/* navigation précédent / suivant */
.project-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line);
}

.project-nav a {
  padding: clamp(1.6rem, 4vw, 2.6rem) var(--pad);
  transition: background .35s var(--ease);
}

.project-nav a:hover { background: var(--paper-deep); }

.project-nav a + a { border-left: 1px solid var(--line); text-align: right; }

.project-nav .overline { display: block; margin-bottom: .4rem; }

.project-nav h3 { font-size: 1.4rem; }

/* ---------- lightbox ---------- */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(18, 18, 15, .96);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity .35s var(--ease);
}

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

.lightbox img {
  max-width: min(92vw, 1500px);
  max-height: 86vh;
  object-fit: contain;
  box-shadow: 0 30px 80px rgba(0, 0, 0, .5);
}

.lb-btn {
  position: absolute;
  background: none;
  border: 0;
  color: rgba(253, 252, 250, .85);
  font-size: 1rem;
  cursor: pointer;
  padding: 1rem;
  transition: color .25s, transform .25s;
  font-family: var(--font-body);
  letter-spacing: .2em;
  text-transform: uppercase;
}

.lb-btn:hover { color: var(--white); }

.lb-close { top: 1rem; right: 1.2rem; font-size: 1.6rem; line-height: 1; }
.lb-prev { left: .8rem; top: 50%; transform: translateY(-50%); font-size: 2rem; }
.lb-next { right: .8rem; top: 50%; transform: translateY(-50%); font-size: 2rem; }

.lb-count {
  position: absolute;
  bottom: 1.2rem;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(253, 252, 250, .6);
  font-size: .74rem;
  letter-spacing: .3em;
}

/* ---------- bandeau CTA ---------- */

.cta-band {
  text-align: center;
  padding-block: clamp(4.5rem, 10vw, 8rem);
}

.cta-band h2 {
  font-size: clamp(2.2rem, 5vw, 4rem);
  max-width: 20em;
  margin-inline: auto;
}

.btn {
  display: inline-block;
  margin-top: 2.2rem;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
  padding: 1rem 2.6rem;
  border: 1px solid currentColor;
  border-radius: 3rem;
  transition: all .35s var(--ease);
}

.btn:hover { background: var(--moss); border-color: var(--moss); color: var(--white); }

.dark .btn:hover { background: var(--paper); border-color: var(--paper); color: var(--ink); }

/* ---------- footer ---------- */

.site-footer {
  background: var(--ink);
  color: var(--paper);
  padding-block: clamp(3.5rem, 7vw, 6rem) 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid #33322c;
}

@media (max-width: 800px) { .footer-grid { grid-template-columns: 1fr; gap: 2rem; } }

.site-footer h3 {
  font-size: 1.9rem;
  font-weight: 500;
  max-width: 14em;
}

.site-footer .overline { margin-bottom: .9rem; display: block; }

.site-footer address {
  font-style: normal;
  color: rgba(246, 244, 239, .78);
  line-height: 2;
}

.site-footer a:hover { color: var(--moss); }

.footer-links { display: grid; gap: .5rem; align-content: start; }

.footer-links a {
  font-size: .82rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: rgba(246, 244, 239, .78);
  transition: color .25s;
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1.6rem;
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--stone);
}

/* ---------- carte contact ---------- */

.map-embed {
  border: 0;
  width: 100%;
  height: min(60vh, 520px);
  filter: grayscale(.85) contrast(1.05);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: clamp(2rem, 6vw, 5rem);
}

@media (max-width: 900px) { .contact-grid { grid-template-columns: 1fr; } }

.contact-item { padding: 1.4rem 0; border-top: 1px solid var(--line); }

.contact-item .overline { display: block; margin-bottom: .3rem; }

.contact-item a, .contact-item span {
  font-family: var(--font-display);
  font-size: 1.5rem;
}

.contact-item a:hover { color: var(--moss-deep); }

/* ---------- révélations au scroll ---------- */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .9s var(--ease), transform .9s var(--ease);
}

.reveal.in { opacity: 1; transform: none; }

.reveal-d1 { transition-delay: .12s; }
.reveal-d2 { transition-delay: .24s; }
.reveal-d3 { transition-delay: .36s; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .scroll-cue::after { animation: none; }
  html { scroll-behavior: auto; }
}