:root {
  --night: #0b1514;
  --night-2: #102322;
  --text: #eef2f0;
  --muted: rgba(238, 242, 240, 0.64);
  --line: rgba(238, 242, 240, 0.13);
  --accent: #4fc2ba;
  --accent-soft: #9fd8d3;
  --mauve: #b499c2;
  --red: #e06a5a;
  --gutter: 5vw;
  --sans: 'Manrope', sans-serif;
  --display: 'Space Grotesk', sans-serif;
  --dot-teal: rgba(79, 194, 186, 0.55);
  --dot-mauve: rgba(180, 153, 194, 0.55);
  --dot-red: rgba(224, 106, 90, 0.55);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; background: var(--night); }

body {
  margin: 0;
  font-family: var(--sans);
  background: linear-gradient(180deg, var(--night) 0%, var(--night-2) 100%);
  color: var(--text);
  line-height: 1.55;
}

a { color: inherit; }
a:focus-visible { outline: 2px solid var(--accent-soft); outline-offset: 4px; }
em { color: var(--accent-soft); font-style: normal; }

main, footer { position: relative; }

/* Lucioles (générées par site.js) */

.fireflies {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  overflow: hidden;
}

.fireflies span {
  position: absolute;
  left: var(--x);
  top: var(--y);
  width: var(--size);
  height: var(--size);
  border-radius: 50%;
  background: var(--color);
  box-shadow: 0 0 14px 4px var(--color);
  opacity: 0;
  animation: firefly-drift var(--dur) ease-in-out infinite;
  animation-delay: var(--delay);
}

@keyframes firefly-drift {
  0%   { transform: translate(0, 0) scale(0.85); opacity: 0; }
  15%  { opacity: 0.8; }
  30%  { transform: translate(var(--tx), var(--ty)) scale(1.05); }
  50%  { transform: translate(var(--tx2), var(--ty2)) scale(1.1); opacity: 1; }
  70%  { transform: translate(var(--tx3), var(--ty3)) scale(1.02); opacity: 0.6; }
  85%  { opacity: 0.33; }
  100% { transform: translate(0, 0) scale(0.85); opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .fireflies { display: none; }
  html { scroll-behavior: auto; }
}

/* En-tête */

.site-header {
  padding: 28px var(--gutter);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: absolute;
  width: 100%;
  top: 0;
  z-index: 5;
}

.logo {
  font-family: var(--display);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
}
.logo span { color: var(--accent); }

nav { display: flex; gap: 30px; align-items: center; }

nav > a, .menu-trigger {
  font-family: var(--display);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
  opacity: 0.88;
}
nav > a:hover, .menu-trigger:hover, .has-menu:focus-within .menu-trigger { color: var(--accent-soft); opacity: 1; }

.nav-contact { border-bottom: 1px solid #fff; padding-bottom: 3px; }
.nav-contact span { color: var(--accent); }

.has-menu { position: relative; padding: 10px 0; }
.submenu {
  position: absolute;
  top: 100%;
  left: -18px;
  min-width: 250px;
  padding: 10px;
  background: rgba(11, 21, 20, 0.94);
  border: 1px solid var(--line);
  border-radius: 6px;
  backdrop-filter: blur(10px);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
}
.has-menu:hover .submenu, .has-menu:focus-within .submenu { opacity: 1; visibility: visible; transform: none; }
.submenu a {
  display: block;
  padding: 10px 12px;
  border-radius: 4px;
  font-family: var(--display);
  font-size: 0.9rem;
  color: #fff;
  text-decoration: none;
}
.submenu a:hover { background: rgba(79, 194, 186, 0.14); color: var(--accent-soft); }

/* Hero (accueil et pages) */

.hero, .page-hero {
  position: relative;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  background: var(--night);
}
.hero { min-height: 92vh; }
.page-hero { min-height: 64vh; }

.hero-bg {
  position: absolute;
  left: 0;
  right: 0;
  top: -60px;
  bottom: 0;
  z-index: 0;
  background: var(--img, url('../assets/images/montagnes-coucher-soleil.jpg')) center var(--pos, 50%) / cover no-repeat;
  will-change: transform;
}

.hero .hero-bg { top: -130px; }

.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(0deg, var(--night) 0%, rgba(11, 21, 20, 0.5) 30%, rgba(11, 21, 20, 0.06) 68%, rgba(11, 21, 20, 0.22) 100%);
}

.hero-content {
  position: relative;
  z-index: 3;
  width: 100%;
  padding: 18vh var(--gutter) 8vh;
}
.page-hero .hero-content { padding-top: 24vh; }

.eyebrow-pill {
  display: inline-block;
  margin: 0 0 4vh;
  padding: 9px 20px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 30px;
  font-size: 0.85rem;
  color: #fff;
  backdrop-filter: blur(6px);
}

.hero h1, .page-hero h1 {
  max-width: 980px;
  margin: 0 0 4vh;
  font-family: var(--display);
  font-size: clamp(2.6rem, 6.4vw, 5.4rem);
  font-weight: 300;
  letter-spacing: -0.04em;
  line-height: 1.02;
}

.hero-bottom { display: flex; justify-content: space-between; align-items: end; gap: 30px; }
.hero-intro { max-width: 460px; margin: 0; font-size: 1.05rem; color: rgba(255, 255, 255, 0.86); }
.text-link { font-family: var(--display); font-size: 0.95rem; color: #fff; text-decoration: none; }
.text-link span { color: var(--accent-soft); font-size: 1.2rem; margin-left: 12px; }
.text-link:hover { color: var(--accent-soft); }

/* Sections */

.services, .realisations, .methode, .contact, .page-section, .page-cta { padding: 11vw var(--gutter); }
.page-section, .page-cta { padding: 8vw var(--gutter); }
.page-section-soft { background: var(--night-2); }

/* Sections claires : on change les variables, tout le contenu suit */
.realisations, .contact, .page-section:not(.page-section-soft) {
  --text: #0f1c1b;
  --muted: rgba(15, 28, 27, 0.68);
  --line: rgba(15, 28, 27, 0.16);
  --accent: #1a7f77;
  --accent-soft: #1a7f77;
  background: #eef1ee;
  color: var(--text);
}

.eyebrow { margin: 0; color: var(--accent); font-family: var(--display); font-size: 0.95rem; font-weight: 500; }

.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 20px;
  border-top: 1px solid var(--line);
  padding-top: 20px;
}
.section-heading h2 {
  max-width: 640px;
  margin: 0;
  font-family: var(--display);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 300;
  letter-spacing: -0.035em;
  line-height: 1.1;
  text-align: right;
}
.page-section .section-heading + * { margin-top: 5vw; }

/* Services : carreaux 2 x 2 */

.service-list { margin-top: 5vw; display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.6vw; }
.service {
  position: relative;
  display: flex;
  align-items: flex-end;
  aspect-ratio: 16 / 8.2;
  padding: 26px 28px;
  border-radius: 4px;
  overflow: hidden;
  text-decoration: none;
  color: #fff;
  background: var(--img) center var(--pos, 50%) / cover no-repeat;
  outline: 1px solid transparent;
  transition: outline-color 0.3s ease;
}
.service::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(11, 21, 20, 0.85) 0%, rgba(11, 21, 20, 0.25) 50%, rgba(11, 21, 20, 0) 100%);
}
.service > div { position: relative; }
.service h3 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.7rem, 2.8vw, 2.6rem);
  font-weight: 300;
  letter-spacing: -0.04em;
  line-height: 1.05;
  transition: color 0.3s ease;
}
.service p { margin: 8px 0 0; max-width: 420px; color: rgba(238, 242, 240, 0.76); }
.service:hover, .service:focus-visible { outline-color: rgba(79, 194, 186, 0.6); }
.service:hover h3, .service:focus-visible h3 { font-weight: 700; color: #9fd8d3; }

/* Réalisations */

.realisations { overflow: hidden; }
.project-track {
  display: flex;
  gap: 24px;
  margin: 5vw calc(var(--gutter) * -1) 0;
  padding: 0 var(--gutter) 6px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-padding-left: var(--gutter);
  scrollbar-width: none;
  cursor: grab;
}
.project-track::-webkit-scrollbar { display: none; }
.project-track[data-glisse] { cursor: grabbing; user-select: none; scroll-snap-type: none; }
.project-track:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; border-radius: 4px; }
.project-track .project { flex: 0 0 clamp(240px, 26vw, 380px); scroll-snap-align: start; }
.project-image { aspect-ratio: 4 / 3; background-size: cover; background-position: top center; border-radius: 3px; box-shadow: inset 0 0 0 1px rgba(15, 28, 27, 0.1); transition: transform 0.5s ease; }

.dots { display: flex; justify-content: center; gap: 8px; margin-top: 26px; }
.dots[hidden] { display: none; }
.dots i { width: 8px; height: 8px; border-radius: 999px; background: rgba(15, 28, 27, 0.18); transition: width 0.25s, background 0.25s; }
.dots i.on { width: 22px; background: var(--accent); }
.project { text-decoration: none; }
.project-image { aspect-ratio: 1.15; background-size: cover; background-position: center; border-radius: 3px; transition: transform 0.5s ease; }
.project:hover .project-image { transform: scale(0.98); }
.project-meta { display: flex; flex-direction: column; gap: 4px; padding: 16px 0; }
.project-meta span:first-child { font-family: var(--display); font-size: 1.1rem; font-weight: 500; }
.project-meta span:last-child { font-size: 0.85rem; color: var(--muted); }

/* Méthode (une vraie suite d'étapes) */

.methode { background: var(--night-2); }
.methode-list {
  margin-top: 5vw;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4vw;
  border-top: 1px solid var(--line);
  padding-top: 4vw;
}
.methode-step span { font-family: var(--display); color: var(--accent); font-size: 1rem; display: block; margin-bottom: 14px; }
.methode-step h3 { margin: 0 0 10px; font-family: var(--display); font-size: 1.6rem; font-weight: 500; letter-spacing: -0.02em; }
.methode-step p { margin: 0; font-size: 0.95rem; color: var(--muted); }

/* Contact */

.contact { min-height: 60vh; display: flex; flex-direction: column; justify-content: center; }
.contact h2, .page-cta h2 {
  margin: 4vw 0 5vw;
  font-family: var(--display);
  font-size: clamp(3.2rem, 9vw, 8rem);
  font-weight: 300;
  letter-spacing: -0.05em;
  line-height: 0.95;
}
.page-cta { display: flex; flex-direction: column; }
.page-cta h2 { font-size: clamp(2.6rem, 6.4vw, 5.4rem); }
.contact-link {
  align-self: flex-end;
  padding-bottom: 5px;
  border-bottom: 1px solid var(--text);
  font-family: var(--display);
  font-size: 1.05rem;
  text-decoration: none;
}
.contact-link span { color: var(--accent); }
.contact-link:hover { color: var(--accent-soft); border-color: var(--accent-soft); }

/* Pages de service */

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 5vw; }
.two-col p { margin: 0; color: var(--muted); font-size: 1.05rem; }
.two-col strong { color: var(--text); font-weight: 600; }
.two-col + .card-grid { margin-top: 5vw; }

.card-grid { display: grid; grid-template-columns: repeat(2, 1fr); column-gap: 5vw; }
.card-grid-3 { grid-template-columns: repeat(3, 1fr); column-gap: 4vw; }
.card { padding: 26px 0; border-top: 1px solid var(--line); }
.card h3 { margin: 0 0 8px; font-family: var(--display); font-size: 1.3rem; font-weight: 500; letter-spacing: -0.02em; }
.card p { margin: 0; color: var(--muted); font-size: 0.97rem; max-width: 460px; }

.tiers { display: grid; grid-template-columns: repeat(2, 1fr); gap: 3vw; }
.tier { padding: 36px; border: 1px solid var(--line); border-radius: 4px; }
.tier-featured { background: rgba(79, 194, 186, 0.1); border-color: rgba(79, 194, 186, 0.45); }
.tier-label { font-family: var(--display); font-size: 0.95rem; color: var(--accent); }
.tier h3 { margin: 8px 0 14px; font-family: var(--display); font-size: 2.4rem; font-weight: 300; letter-spacing: -0.04em; }
.tier p { margin: 0 0 20px; color: var(--muted); }
.tier ul { margin: 0; padding: 0; list-style: none; }
.tier li { padding: 11px 0; border-top: 1px solid var(--line); font-size: 0.95rem; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4vw; }
.step span { font-family: var(--display); color: var(--accent); font-size: 1rem; display: block; margin-bottom: 14px; }
.step h3 { margin: 0 0 10px; font-family: var(--display); font-size: 1.5rem; font-weight: 500; letter-spacing: -0.02em; }
.step p { margin: 0; color: var(--muted); }

.see-also { display: grid; grid-template-columns: repeat(3, 1fr); gap: 3vw; }
.see-also a {
  display: block;
  padding: 22px 0;
  border-top: 1px solid var(--line);
  font-family: var(--display);
  font-size: 1.5rem;
  font-weight: 300;
  letter-spacing: -0.03em;
  text-decoration: none;
  transition: color 0.3s ease, padding-left 0.3s ease;
}
.see-also a span { color: var(--accent); }
.see-also a:hover { color: var(--accent-soft); padding-left: 10px; }

/* Pied de page */

footer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 30px 6vw;
  padding: 40px var(--gutter) 32px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}
footer .logo { font-size: 0.95rem; }
footer p { margin: 8px 0 0; max-width: 320px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 10px 28px; align-items: start; justify-content: flex-end; }
.footer-links a { text-decoration: none; }
.footer-links a:hover { color: var(--accent-soft); }
.footer-copy { grid-column: 1 / -1; padding-top: 22px; border-top: 1px solid var(--line); font-size: 0.8rem; display: flex; justify-content: space-between; gap: 20px; }
.footer-copy a { text-decoration: none; }

@media (max-width: 900px) {
  .service { aspect-ratio: 1 / 0.85; padding: 18px; }
  .service p { font-size: 0.85rem; }
  .two-col, .tiers, .card-grid, .card-grid-3, .steps, .see-also { grid-template-columns: 1fr; }
  .methode-list { grid-template-columns: repeat(2, 1fr); }
  .project-track .project { flex-basis: min(62vw, 300px); }
  .two-col { gap: 20px; }
  .tiers { gap: 16px; }
  .steps { gap: 28px; }
  .tier { padding: 28px; }
  .page-section .section-heading + * { margin-top: 32px; }
}

@media (max-width: 650px) {
  .site-header { padding: 22px var(--gutter); }
  nav { gap: 14px; }
  nav > a:not(.nav-contact), .has-menu { display: none; }
  .hero { min-height: 88vh; }
  .page-hero { min-height: 56vh; }
  .hero-content { padding-top: 20vh; }
  .hero-bottom, .section-heading { align-items: flex-start; flex-direction: column; }
  .section-heading h2 { text-align: left; }
  .text-link { margin-top: 20px; }
  .service-list { grid-template-columns: 1fr; gap: 14px; }
  .service { aspect-ratio: 16 / 11; padding: 20px; }
  .service::before { background: linear-gradient(0deg, rgba(11, 21, 20, 0.82) 0%, rgba(11, 21, 20, 0.4) 50%, rgba(11, 21, 20, 0) 100%); }
  .methode-list { grid-template-columns: 1fr; }
  .contact { min-height: 50vh; }
  .contact-link { align-self: flex-start; }
  footer { grid-template-columns: 1fr; }
  .footer-links { justify-content: flex-start; }
  .footer-copy { flex-direction: column; gap: 8px; }
}

/* Formulaire de demande */
.contact-form { margin-top: 3vw; max-width: 640px; display: grid; gap: 18px; }
.contact-form label { display: grid; gap: 6px; font-size: 0.9rem; font-weight: 600; }
.contact-form input, .contact-form select, .contact-form textarea {
  font: inherit; font-weight: 400; padding: 12px 14px; border: 1px solid rgba(15, 28, 27, 0.25);
  border-radius: 3px; background: #fff; color: inherit;
}
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { outline: 2px solid rgba(79, 194, 186, 0.6); border-color: transparent; }
.contact-form button {
  justify-self: start; font: inherit; font-weight: 600; padding: 14px 26px; border: 0; border-radius: 30px;
  background: var(--night); color: #fff; cursor: pointer; transition: background 0.2s ease;
}
.contact-form button:hover { background: #1b3a37; }
.form-note { margin: 0; font-size: 0.85rem; opacity: 0.7; }

/* Lisibilité du texte sur les photos (les voiles sont légers) */
.hero-content h1, .hero-content .hero-intro, .hero-content .text-link, .eyebrow-pill, .service h3, .service p { text-shadow: 0 1px 14px rgba(0, 0, 0, 0.45); }