/* --------------------------------------------------------
   PÉRIODES — mise en page dédiée (non destructive)
---------------------------------------------------------*/

.periodes-wrap{
  width: 100%;
  /* header fixed dans style.css => on descend le contenu */
  padding-top: 72px;
  padding-bottom: 60px;
}

.periodes-container{
  width: 90%;
  max-width: 1180px;
  margin: 0 auto;
}

.periodes-top,
.periodes-bottom{
  display: flex;
  justify-content: center;
  margin: 8px 0 18px;
}

/* Bouton : même esprit que biographie/contact */
.periodes-btn{
  display: inline-block;
  padding: 10px 18px;
  border-radius: 10px;
  border: 1px solid rgba(58,42,26,0.25);
  background: rgba(255,255,255,0.55);
  color: #3a2a1a;
  text-decoration: none;
  font-weight: 600;
  transition: transform .15s ease, box-shadow .15s ease;
}

.periodes-btn:hover{
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(0,0,0,0.08);
}

.periodes-head{
  text-align: center;
  margin: 0 auto 18px;
  padding: 8px 12px 6px;
}

.periodes-h1{
  font-size: 2.2rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 700;
  margin: 0;
}

.periodes-subtitle{
  margin-top: 10px;
  font-size: 1.02rem;
  opacity: 0.9;
}

.periodes-h2{
  margin: 24px 0 12px;
  font-size: 1.08rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.periodes-menu-grid{
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  align-items: stretch; /* bas alignés */
}

.periodes-menu-card{
  background: rgba(255,255,255,0.35);
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: 18px;
  padding: 16px 16px 10px;
  box-shadow: 0 14px 30px rgba(0,0,0,0.06);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.periodes-h3{
  font-size: 1.02rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 10px;
}

.periodes-menu-list{
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 1;
}

.periodes-menu-item{
  padding: 10px 0;
  border-top: 1px solid rgba(0,0,0,0.06);
}

.periodes-menu-item:first-child{
  border-top: none;
}

.periodes-menu-link{
  color: #3a2a1a;
  text-decoration: none;
  font-weight: 600;
  display: inline-block;
}

.periodes-menu-link:hover{
  color: #8c6239;
}

.periodes-menu-desc{
  margin-top: 6px;
  font-size: 0.95rem;
  opacity: 0.9;
}

.periodes-content{
  margin-top: 28px;
}

.periodes-card{
  background: rgba(241,227,207,0.85);
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: 18px;
  padding: 18px 18px 12px;
  box-shadow: 0 14px 30px rgba(0,0,0,0.06);
  margin: 18px 0;
}

/* Fix scroll under fixed header */
.periodes-card,
.periodes-anchor{
  scroll-margin-top: 110px;
}

.periodes-range{
  margin: 0 0 6px;
  font-size: 1.35rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.periodes-title{
  margin: 0 0 14px;
  font-size: 1.05rem;
  font-weight: 700;
}

.periodes-p{
  margin: 0 0 10px;
  font-size: 1rem;
  line-height: 1.75;
}

.periodes-sub{
  margin: 14px 0 8px;
  font-size: 1rem;
  font-weight: 700;
}

.periodes-reperes{
  margin: 14px 0 10px;
  font-size: 0.98rem;
  font-style: italic;
  opacity: 0.92;
}

.periodes-anchor{
  display: block;
  height: 0;
}

/* Responsive */
@media (max-width: 980px){
  .periodes-menu-grid{
    grid-template-columns: 1fr;
  }
  .periodes-wrap{
    padding-top: 70px;
  }
}


/* Défense contre les styles globaux du site (ex: header { position: fixed; ... })
   Le bloc titre de page doit rester dans le flux normal (pas de superposition). */
.periodes-page .periodes-head{
  position: static !important;
  inset: auto !important;
  top: auto !important;
  left: auto !important;
  right: auto !important;
  z-index: auto !important;
}



/* Préambule : cartouche entre le titre et le sous-titre */
.periodes-preambule{
  margin: 14px auto 12px;
  max-width: 980px;
  background: rgba(255,255,255,0.35);
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: 18px;
  padding: 14px 16px 8px;
  box-shadow: 0 14px 30px rgba(0,0,0,0.06);
  text-align: left;
}

.periodes-preambule-p{
  margin: 0 0 10px;
  font-size: 1rem;
  line-height: 1.7;
  opacity: 0.95;
}

@media (max-width: 980px){
  .periodes-preambule{
    margin-left: auto;
    margin-right: auto;
  }
}


/* Préambule : titre (1ère ligne) — plus gros, gras, centré */
.periodes-preambule .periodes-preambule-p:first-child{
  font-weight: 700;
  font-size: 1.10rem;
  text-align: center;
  letter-spacing: 0.02em;
}