/* style.css corrigé */
:root {
  --brand: #5D2490;
  --brand-2: #6C399A;
  --brand-dark: #3B145D;
  --brand-soft: #ECE6F2;
  --bg: #f7f7fb;
  --card: #ffffff;
  --ink: #0b1020;
  --muted: #667085;
  --ring: rgba(93, 36, 144, .28);
  --border: rgba(15, 23, 42, .10);
  --shadow: 0 12px 40px rgba(15, 23, 42, .12);
  --shadow2: 0 18px 70px rgba(15, 23, 42, .18);
  --shadow-glow: 0 0 40px rgba(93, 36, 144, .15);
  --radius: 18px;
  --radius-lg: 24px;
  --container: 1120px;
  --transition: all .25s cubic-bezier(.4, 0, .2, 1);
  --transition-slow: all .4s cubic-bezier(.4, 0, .2, 1);
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-heading: 'Manrope', system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: clamp(1rem, 0.95rem + 0.2vw, 1.0625rem);
  line-height: 1.6;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 20% -10%, rgba(93,36,144,.12), transparent 60%),
    radial-gradient(900px 500px at 90% 10%, rgba(108,57,154,.10), transparent 55%),
    var(--bg);
  overflow-x: hidden;
}

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

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

p {
  color: rgba(11,16,32,.78);
}

.container {
  width: min(var(--container), calc(100% - 40px));
  margin-inline: auto;
}

.center {
  display: flex;
  justify-content: center;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip-link:focus {
  left: 12px;
  top: 12px;
  width: auto;
  height: auto;
  padding: 10px 12px;
  border-radius: 12px;
  background: #fff;
  box-shadow: var(--shadow);
  z-index: 1000;
  outline: 3px solid var(--brand);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(255,255,255,.85);
  border-bottom: 1px solid rgba(15,23,42,.06);
  transition: var(--transition);
}

.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
}

.logo img {
  height: 44px;
  width: auto;
  transition: transform .3s ease;
}

.logo img:hover {
  transform: scale(1.03);
}

nav ul {
  list-style: none;
  display: flex;
  gap: 8px;
  padding: 0;
  margin: 0;
  align-items: center;
  flex-wrap: wrap;
}

nav a {
  border-radius: 12px;
  padding: 10px 14px;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

nav a:hover {
  background: rgba(93,36,144,.08);
  transform: translateY(-1px);
  color: var(--brand);
}

nav a:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px var(--ring);
}

nav a[aria-current="page"] {
  background: rgba(93,36,144,.12);
  font-weight: 700;
  color: var(--brand-dark);
}

nav a::after {
  content: '';
  position: absolute;
  bottom: 6px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--brand);
  transition: var(--transition);
  transform: translateX(-50%);
  border-radius: 2px;
}

nav a:hover::after {
  width: 60%;
}

/* Buttons */
.btn-primary,
.btn-cta,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 14px;
  font-weight: 700;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary,
.btn-cta {
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  box-shadow: 0 10px 24px rgba(93,36,144,.22);
}

.btn-primary:hover,
.btn-cta:hover {
  background: linear-gradient(135deg, var(--brand-2), var(--brand));
  transform: translateY(-2px);
  box-shadow: var(--shadow2), var(--shadow-glow);
}

.btn-secondary {
  background: rgba(255,255,255,.85);
  border-color: rgba(93,36,144,.22);
  color: var(--brand-dark);
}

.btn-secondary:hover {
  background: rgba(236,230,242,.9);
  border-color: var(--brand);
  transform: translateY(-1px);
}

.btn-primary:focus-visible,
.btn-secondary:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px var(--ring);
}

/* Sections */
section {
  padding: clamp(3rem, 6vw, 4.5rem) 0;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
  flex-wrap: wrap;
}

.section-head h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 1.5rem + 1.2vw, 2.25rem);
  font-weight: 800;
  line-height: 1.1;
  background: linear-gradient(135deg, var(--ink), var(--brand-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin: 0;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  max-width: 560px;
  font-size: 1.05rem;
}

/* Hero */
.hero-pro {
  position: relative;
  min-height: clamp(500px, 70vh, 800px);
  display: grid;
  place-items: center;
  overflow: hidden;
  padding: 0;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.02);
  filter: contrast(1.05) saturate(1.05);
  transition: opacity .4s ease;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  background:
    radial-gradient(900px 500px at 18% 20%, rgba(93,36,144,.68), transparent 60%),
    radial-gradient(800px 420px at 92% 28%, rgba(108,57,154,.48), transparent 55%),
    linear-gradient(90deg, rgba(9, 10, 20, .82) 0%, rgba(9, 10, 20, .48) 55%, rgba(9, 10, 20, .24) 100%);
}

.hero-inner {
  position: relative;
  z-index: 3;
  padding: clamp(2rem, 5vw, 4rem) 0;
  max-width: 920px;
  text-align: center;
  color: white;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  background: rgba(255,255,255,.14);
  border: 1px solid rgba(255,255,255,.22);
  color: rgba(255,255,255,.95);
  backdrop-filter: blur(10px);
  font-weight: 700;
  font-size: 0.875rem;
  margin: 0 0 1rem;
  animation: fadeInDown .5s ease;
}

.hero-inner h1 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 1.5rem + 3.5vw, 3.5rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
  animation: fadeInUp .6s ease .1s both;
}

.hero-grad {
  background: linear-gradient(90deg, #ffffff, rgba(255,255,255,.6));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  color: rgba(255,255,255,.9);
  font-size: clamp(1rem, 0.95rem + 0.4vw, 1.15rem);
  line-height: 1.65;
  margin: 0 0 1.5rem;
  max-width: 720px;
  margin-inline: auto;
  animation: fadeInUp .6s ease .2s both;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 2rem;
  animation: fadeInUp .6s ease .3s both;
}

.hero-proof {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-top: 1rem;
  max-width: 820px;
  margin-inline: auto;
  animation: fadeInUp .6s ease .4s both;
}

.proof {
  padding: 12px 16px;
  border-radius: 16px;
  background: rgba(0,0,0,.3); /* plus contrasté */
  border: 1px solid rgba(255,255,255,.2);
  backdrop-filter: blur(10px);
  text-align: left;
}

.proof strong {
  display: block;
  color: #fff;
  font-weight: 800;
  margin-bottom: 2px;
  font-size: 0.95rem;
}

.proof span {
  display: block;
  color: rgba(255,255,255,.9);
  font-size: 0.9rem;
}

.hero-thumbs {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 1.5rem;
}

/* Thumbnails corrigés */
.thumb {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,.5);
  background-size: cover;
  background-position: center;
  background-color: rgba(0,0,0,.3); /* fallback */
  cursor: pointer;
  transition: var(--transition);
}

.thumb:hover {
  transform: scale(1.1);
  border-color: white;
}

.thumb.is-active {
  border-color: white;
  box-shadow: 0 0 0 3px rgba(255,255,255,.3);
  transform: scale(1.1);
}

/* Attribution des images via data-hero */
.thumb[data-hero="images/hero-pylone.jpg"] {
  background-image: url('images/hero-pylone.jpg');
}
.thumb[data-hero="images/hero-charpente.jpg"] {
  background-image: url('images/hero-charpente.jpg');
}

/* Stats */
.stats {
  padding: clamp(1.5rem, 3vw, 2.5rem) 0;
  background: rgba(255,255,255,.6);
  border-bottom: 1px solid var(--border);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.stat {
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius);
  background: rgba(255,255,255,.85);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: var(--transition);
  border-left: 3px solid var(--brand-2);
}

.stat:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow2);
}

.stat h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  margin: 0 0 0.4rem;
  color: var(--brand-dark);
  font-weight: 700;
}

.stat p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Cards Premium */
.cards.premium {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.card.pcard {
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,.95);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: var(--transition-slow);
  position: relative;
  overflow: hidden;
  min-height: 280px;
}

.card.pcard::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand), var(--brand-2), var(--brand));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s ease;
}

.card.pcard:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow2), var(--shadow-glow);
  border-color: rgba(93,36,144,.25);
}

.card.pcard:hover::before {
  transform: scaleX(1);
}

.pcard-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.pcard h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0;
  color: var(--ink);
  line-height: 1.3;
}

.chip {
  font-size: 0.75rem;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(93,36,144,.12);
  color: var(--brand-dark);
  font-weight: 700;
  white-space: nowrap;
  line-height: 1.2;
  flex-shrink: 0;
  align-self: flex-start;
}

.pcard p {
  margin: 0.5rem 0 1rem;
  color: var(--muted);
  flex-grow: 1;
  font-size: 0.95rem;
  line-height: 1.5;
}

.pcard-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-weight: 700;
  color: var(--brand);
  transition: gap .3s ease;
  margin-top: auto;
}

.card.pcard:hover .pcard-cta {
  gap: 0.5rem;
}

/* Projects */
.project-grid.modern {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 2rem;
}

.project-card {
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,.85);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 1rem;
  transition: var(--transition);
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow2);
}

.pimg {
  height: 180px;
  border-radius: 14px;
  overflow: hidden;
  margin-bottom: 1rem;
  background: #ece6f2; /* fallback */
}

.pimg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}

.project-card:hover .pimg img {
  transform: scale(1.05);
}

.project-card h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
}

.project-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* CTA Final */
.cta-final {
  padding: clamp(2.5rem, 5vw, 4rem) 0;
}

.cta-box {
  display: grid;
  gap: 1.5rem;
  padding: clamp(1.5rem, 3vw, 2rem);
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(93,36,144,.16), rgba(108,57,154,.12));
  border: 1px solid rgba(15,23,42,.12);
  box-shadow: var(--shadow2);
}

.cta-box h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 1.3rem + 1vw, 2rem);
  font-weight: 800;
  margin: 0 0 0.5rem;
  color: var(--brand-dark);
}

.cta-box p {
  margin: 0;
  color: var(--muted);
  max-width: 600px;
}

.cta-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* Footer */
footer {
  padding: 2rem 0 2.5rem;
  border-top: 1px solid var(--border);
  background: rgba(255,255,255,.7);
  text-align: center;
  font-size: 0.9rem;
}

footer p {
  margin: 0.5rem 0;
  color: var(--muted);
}

footer a {
  color: var(--brand);
  font-weight: 700;
  transition: var(--transition);
}

footer a:hover {
  color: var(--brand-dark);
  text-decoration: underline;
}

/* Animations */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Accessibilité & réduction de mouvement */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

:focus-visible {
  outline: 3px solid var(--brand);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Responsive */
@media (max-width: 980px) {
  .top-bar {
    flex-direction: column;
    padding: 10px 0;
  }

  nav ul {
    justify-content: center;
    gap: 4px;
  }

  nav a {
    padding: 8px 10px;
    font-size: 0.9rem;
  }

  .section-head {
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
  }

  .hero-proof {
    grid-template-columns: 1fr;
  }

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

  .cards.premium {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .project-grid.modern {
    grid-template-columns: 1fr;
  }

  .cta-box {
    text-align: center;
  }

  .cta-actions {
    justify-content: center;
  }
}

@media (max-width: 640px) {
  .cards.premium {
    grid-template-columns: 1fr;
  }

  .pcard-top {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .chip {
    align-self: flex-start;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
    max-width: 320px;
  }
}