/* ================================================
   TARN CLIM – Stylesheet
   ================================================ */

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --c-primary:   #0ea5e9;
  --c-primary-d: #0284c7;
  --c-primary-l: #e0f2fe;
  --c-dark:      #0f172a;
  --c-text:      #334155;
  --c-text-soft: #64748b;
  --c-border:    #e2e8f0;
  --c-bg:        #f8fafc;
  --c-white:     #ffffff;
  --c-accent:    #38bdf8;
  --radius:      14px;
  --shadow:      0 4px 24px rgba(15,23,42,.08);
  --shadow-lg:   0 16px 48px rgba(15,23,42,.14);
  --nav-h:       72px;
  --transition:  .3s cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--c-text);
  background: var(--c-white);
  overflow-x: hidden;
}

img { display: block; max-width: 100%; height: auto; }
a   { color: inherit; text-decoration: none; }
ul  { list-style: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }

.container {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
}

/* ── Typography ── */
h1 { font-size: clamp(2.4rem, 5vw, 4rem); font-weight: 800; line-height: 1.1; letter-spacing: -.02em; }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.75rem); font-weight: 700; line-height: 1.15; letter-spacing: -.015em; }
h3 { font-size: 1.25rem; font-weight: 600; }
h4 { font-size: 1rem; font-weight: 600; }

.text-accent { color: var(--c-accent); }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .875rem 1.75rem;
  border-radius: 100px;
  font-size: .9375rem;
  font-weight: 600;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--c-primary);
  color: var(--c-white);
  box-shadow: 0 4px 20px rgba(14,165,233,.35);
}
.btn-primary:hover {
  background: var(--c-primary-d);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(14,165,233,.45);
}
.btn-ghost {
  background: rgba(255,255,255,.15);
  color: var(--c-white);
  border: 1.5px solid rgba(255,255,255,.5);
  backdrop-filter: blur(4px);
}
.btn-ghost:hover {
  background: rgba(255,255,255,.25);
  transform: translateY(-2px);
}
.btn-full { width: 100%; justify-content: center; }
.btn-nav {
  padding: .5rem 1.25rem;
  border-radius: 100px;
  background: var(--c-primary);
  color: var(--c-white);
  font-weight: 600;
  font-size: .875rem;
  transition: var(--transition);
}
.btn-nav:hover { background: var(--c-primary-d); }

/* ── Reveal animations ── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .65s cubic-bezier(.4,0,.2,1), transform .65s cubic-bezier(.4,0,.2,1);
}
.reveal.visible          { opacity: 1; transform: none; }
.reveal-delay-1.visible  { transition-delay: .1s; }
.reveal-delay-2.visible  { transition-delay: .2s; }
.reveal-delay-3.visible  { transition-delay: .3s; }

/* ── Section header ── */
.section-header { text-align: center; max-width: 640px; margin-inline: auto; margin-bottom: 3.5rem; }
.section-header--left { text-align: left; margin-inline: 0; }
.section-tag {
  display: inline-block;
  padding: .3rem .85rem;
  border-radius: 100px;
  background: var(--c-primary-l);
  color: var(--c-primary-d);
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.section-header h2 { margin-bottom: 1rem; color: var(--c-dark); }
.section-header p  { color: var(--c-text-soft); font-size: 1.0625rem; }

/* ================================================
   HEADER / NAV
   ================================================ */
#header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  transition: background var(--transition), box-shadow var(--transition);
}
#header.scrolled {
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--c-border);
}

.nav {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--c-white);
  transition: color var(--transition);
}
#header.scrolled .logo { color: var(--c-dark); }
.logo-icon { font-size: 1.5rem; }
.logo-text strong { color: var(--c-primary); }

.nav-links {
  display: flex;
  align-items: center;
  gap: .25rem;
}
.nav-links a {
  padding: .5rem .9rem;
  border-radius: 8px;
  font-size: .9375rem;
  font-weight: 500;
  color: rgba(255,255,255,.85);
  transition: var(--transition);
}
.nav-links a:hover { color: var(--c-white); background: rgba(255,255,255,.1); }
#header.scrolled .nav-links a { color: var(--c-text); }
#header.scrolled .nav-links a:hover { color: var(--c-primary); background: var(--c-primary-l); }
#header.scrolled .nav-links .btn-nav { color: var(--c-white); }

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--c-white);
  border-radius: 2px;
  transition: var(--transition);
}
#header.scrolled .burger span { background: var(--c-dark); }
.burger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ================================================
   HERO
   ================================================ */
#hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  transform: scale(1.04);
  animation: heroZoom 12s ease-in-out infinite alternate;
}
@keyframes heroZoom {
  from { transform: scale(1.04); }
  to   { transform: scale(1.12); }
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(2,36,58,.82) 0%,
    rgba(14,165,233,.35) 60%,
    rgba(2,36,58,.7) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  padding-top: calc(var(--nav-h) + 2rem);
  padding-bottom: 6rem;
  max-width: 760px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .4rem 1rem;
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.3);
  border-radius: 100px;
  color: rgba(255,255,255,.9);
  font-size: .8125rem;
  font-weight: 500;
  letter-spacing: .03em;
  backdrop-filter: blur(8px);
  margin-bottom: 1.5rem;
}
.hero-content h1 {
  color: var(--c-white);
  margin-bottom: 1.5rem;
  text-shadow: 0 2px 24px rgba(0,0,0,.3);
}
.hero-sub {
  color: rgba(255,255,255,.85);
  font-size: clamp(1rem, 2vw, 1.1875rem);
  margin-bottom: 2.5rem;
  line-height: 1.7;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; }

.scroll-down {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid rgba(255,255,255,.45);
  border-radius: 50%;
  color: rgba(255,255,255,.8);
  animation: bounce 2s ease-in-out infinite;
}
.scroll-down svg { width: 20px; height: 20px; }
@keyframes bounce {
  0%,100% { transform: translateX(-50%) translateY(0); }
  50%      { transform: translateX(-50%) translateY(6px); }
}

/* ================================================
   STATS
   ================================================ */
#stats {
  background: var(--c-dark);
  padding: 4rem 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.stat { text-align: center; }
.stat-num {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 800;
  color: var(--c-accent);
  line-height: 1;
}
.stat-unit { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 700; color: var(--c-accent); }
.stat p { color: rgba(255,255,255,.6); margin-top: .4rem; font-size: .9rem; }

/* ================================================
   SERVICES
   ================================================ */
#services {
  padding: 6rem 0;
  background: var(--c-bg);
}
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.service-card {
  background: var(--c-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.service-img-wrap {
  position: relative;
  height: 220px;
  overflow: hidden;
}
.service-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .6s ease;
}
.service-card:hover .service-img-wrap img { transform: scale(1.06); }
.service-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15,23,42,.5) 0%, transparent 60%);
  display: flex;
  align-items: flex-end;
  padding: 1rem;
}
.service-icon { font-size: 2rem; }

.service-body { padding: 1.5rem; }
.service-body h3 { color: var(--c-dark); margin-bottom: .65rem; }
.service-body p  { color: var(--c-text-soft); font-size: .9375rem; margin-bottom: 1rem; }
.service-list { display: flex; flex-direction: column; gap: .35rem; }
.service-list li {
  font-size: .875rem;
  color: var(--c-text-soft);
  padding-left: 1.1rem;
  position: relative;
}
.service-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--c-primary);
  font-size: .75rem;
  top: 2px;
}

.service-card--cta {
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-d) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}
.service-cta-inner { text-align: center; padding: 2.5rem 2rem; }
.cta-emoji { font-size: 3rem; display: block; margin-bottom: 1rem; }
.service-cta-inner h3 { color: var(--c-white); margin-bottom: .75rem; font-size: 1.4rem; }
.service-cta-inner p  { color: rgba(255,255,255,.85); margin-bottom: 1.75rem; }
.service-cta-inner .btn-primary {
  background: var(--c-white);
  color: var(--c-primary-d);
  box-shadow: 0 4px 20px rgba(0,0,0,.15);
}
.service-cta-inner .btn-primary:hover { background: var(--c-primary-l); }

/* ================================================
   POURQUOI NOUS
   ================================================ */
#pourquoi {
  padding: 6rem 0;
  background: var(--c-white);
}
.pourquoi-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

.pourquoi-visual {
  position: relative;
  border-radius: var(--radius);
  overflow: visible;
}
.pourquoi-visual img {
  width: 100%;
  height: 520px;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}
.pourquoi-badge {
  position: absolute;
  bottom: -1.5rem;
  right: -1.5rem;
  background: var(--c-white);
  border-radius: var(--radius);
  padding: 1rem 1.5rem;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 130px;
  border: 2px solid var(--c-primary-l);
}
.pourquoi-badge strong { font-size: 1.25rem; color: var(--c-dark); }
.pourquoi-badge span   { font-size: .8125rem; color: var(--c-primary); font-weight: 600; }

.arguments { display: flex; flex-direction: column; gap: 1.75rem; margin-top: 2rem; }
.arg {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}
.arg-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--c-primary);
  color: var(--c-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: .9rem;
  margin-top: 2px;
}
.arg h4 { color: var(--c-dark); margin-bottom: .3rem; }
.arg p   { font-size: .9375rem; color: var(--c-text-soft); }

/* ================================================
   RÉALISATIONS
   ================================================ */
#realisations {
  padding: 6rem 0;
  background: var(--c-bg);
}
.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto auto;
  gap: 1rem;
}
.gallery-item {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  margin: 0;
}
.gallery-item img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  transition: transform .6s ease;
}
.gallery-item--tall img { height: 540px; }
.gallery-item--wide {
  grid-column: 2 / 4;
}
.gallery-item--wide img { height: 260px; }
.gallery-item:hover img { transform: scale(1.04); }
.gallery-item figcaption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: .75rem 1rem;
  background: linear-gradient(to top, rgba(15,23,42,.75), transparent);
  color: var(--c-white);
  font-size: .875rem;
  font-weight: 500;
}

/* ================================================
   TÉMOIGNAGES
   ================================================ */
#temoignages {
  padding: 6rem 0;
  background: var(--c-dark);
  overflow: hidden;
}
#temoignages .section-header h2 { color: var(--c-white); }

.temoignages-track {
  display: flex;
  gap: 1.5rem;
  overflow: hidden;
  cursor: grab;
}
.temo-card {
  flex: 0 0 calc(33.333% - 1rem);
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius);
  padding: 2rem;
  transition: transform var(--transition);
  backdrop-filter: blur(8px);
}
.temo-stars { color: #fbbf24; font-size: 1.1rem; margin-bottom: 1rem; letter-spacing: .1em; }
.temo-card p  { color: rgba(255,255,255,.8); font-size: .9375rem; font-style: italic; margin-bottom: 1.25rem; line-height: 1.7; }
.temo-card cite { color: var(--c-accent); font-size: .875rem; font-style: normal; font-weight: 500; }

.temo-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-top: 2.5rem;
}
.temo-btn {
  width: 42px; height: 42px;
  border-radius: 50%;
  background: rgba(255,255,255,.1);
  color: var(--c-white);
  font-size: 1.1rem;
  transition: var(--transition);
  border: 1px solid rgba(255,255,255,.15);
}
.temo-btn:hover { background: var(--c-primary); }
.temo-dots { display: flex; gap: .5rem; }
.temo-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,.3);
  transition: var(--transition);
  cursor: pointer;
}
.temo-dot.active { background: var(--c-primary); transform: scale(1.3); }

/* ================================================
   CONTACT
   ================================================ */
#contact {
  padding: 6rem 0;
  background: var(--c-white);
}

.contact-cards {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}
.contact-card {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 2rem 3rem;
  border-radius: 20px;
  transition: transform var(--transition), box-shadow var(--transition);
  min-width: 280px;
}
.contact-card--phone {
  background: var(--c-primary);
  color: var(--c-white);
  box-shadow: 0 8px 32px rgba(14,165,233,.35);
}
.contact-card--phone:hover {
  background: var(--c-primary-d);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(14,165,233,.45);
}
.contact-card--email {
  background: var(--c-bg);
  color: var(--c-dark);
  border: 2px solid var(--c-border);
  box-shadow: var(--shadow);
}
.contact-card--email:hover {
  border-color: var(--c-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.contact-card-icon { font-size: 2.5rem; flex-shrink: 0; }
.contact-card strong {
  display: block;
  font-size: .8125rem;
  font-weight: 500;
  opacity: .65;
  margin-bottom: .2rem;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.contact-card span:last-child {
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: -.01em;
}

.contact-meta {
  display: flex;
  gap: 2.5rem;
  justify-content: center;
  flex-wrap: wrap;
}
.contact-meta-item {
  display: flex;
  align-items: center;
  gap: .5rem;
  color: var(--c-text-soft);
  font-size: .9375rem;
}

.certif-badges { display: flex; flex-wrap: wrap; gap: .5rem; }
.badge {
  padding: .35rem .85rem;
  border-radius: 100px;
  background: var(--c-primary-l);
  color: var(--c-primary-d);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .03em;
}

/* ================================================
   FOOTER
   ================================================ */
#footer { background: var(--c-dark); color: rgba(255,255,255,.7); }
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 4rem;
  padding-top: 4rem;
  padding-bottom: 3rem;
}
.footer-brand .logo { color: var(--c-white); margin-bottom: 1rem; }
.footer-brand p { font-size: .9375rem; line-height: 1.7; max-width: 360px; }
.footer-links h4 { color: var(--c-white); margin-bottom: 1.25rem; font-size: .9375rem; }
.footer-links ul { display: flex; flex-direction: column; gap: .65rem; }
.footer-links a { font-size: .9375rem; transition: color var(--transition); }
.footer-links a:hover { color: var(--c-primary); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 1.5rem 0;
}
.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: .5rem;
}
.footer-bottom p, .footer-bottom a { font-size: .875rem; }
.footer-bottom a { color: var(--c-accent); }
.footer-bottom a:hover { text-decoration: underline; }

/* ================================================
   BACK TO TOP
   ================================================ */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 999;
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--c-primary);
  color: var(--c-white);
  border-radius: 50%;
  font-size: 1.2rem;
  box-shadow: 0 4px 16px rgba(14,165,233,.4);
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity var(--transition), transform var(--transition);
}
.back-to-top.visible { opacity: 1; pointer-events: auto; transform: none; }
.back-to-top:hover { background: var(--c-primary-d); transform: translateY(-2px); }

/* ================================================
   RESPONSIVE
   ================================================ */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .pourquoi-layout { gap: 3rem; }
  .pourquoi-visual img { height: 420px; }
  .gallery {
    grid-template-columns: repeat(2, 1fr);
  }
  .gallery-item--tall { grid-row: span 1; }
  .gallery-item--tall img { height: 260px; }
  .gallery-item--wide { grid-column: span 1; }
  .gallery-item--wide img { height: 260px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  :root { --nav-h: 64px; }

  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    flex-direction: column;
    background: var(--c-white);
    padding: 1.5rem 2rem 2rem;
    gap: .5rem;
    box-shadow: 0 8px 32px rgba(0,0,0,.12);
    transform: translateY(-120%);
    opacity: 0;
    transition: transform .35s cubic-bezier(.4,0,.2,1), opacity .35s;
    pointer-events: none;
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-links a { color: var(--c-text) !important; padding: .75rem 1rem; border-radius: 10px; }
  .nav-links a:hover { background: var(--c-bg) !important; }
  .burger { display: flex; }

  .stats-grid { grid-template-columns: repeat(3, 1fr); }
  .services-grid { grid-template-columns: 1fr; }
  .pourquoi-layout { grid-template-columns: 1fr; gap: 3rem; }
  .pourquoi-visual img { height: 320px; }
  .pourquoi-badge { right: 1rem; }
  .gallery { grid-template-columns: 1fr; }
  .gallery-item--wide { grid-column: span 1; }
  .temo-card { flex: 0 0 85vw; }
  .contact-layout { grid-template-columns: 1fr; gap: 3rem; }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .footer-bottom .container { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; }
  .btn { justify-content: center; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
  .contact-form { padding: 1.5rem; }
}