/* ======== BANNIÈRE REPORTAGE MODERNE ======== */

.alumni-banner {
  display: flex;
  width: 100%;
  height: 260px;
  border-radius: 20px;
  overflow: hidden;
  position: relative;
  text-decoration: none;
  color: white;
  margin: 30px 0;
  box-shadow: 0 8px 25px rgba(0,0,0,0.22);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.alumni-banner:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(0,0,0,0.28);
}

.banner-left {
  flex: 1.1;
  padding: 34px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: linear-gradient(
      to right,
      var(--c1) 0%,
      var(--c1) 55%,
      rgba(0,0,0,0) 100%
  );
}

.banner-left h3 {
  margin: 0 0 8px;
  font-size: 1.5rem;
  color: #ffffff;
}

.banner-left p {
  margin: 0 0 14px;
  max-width: 480px;
  line-height: 1.5;
  opacity: 0.95;
}

.banner-link {
  font-weight: 600;
  opacity: 0.95;
  font-size: 1.05rem;
}

.banner-right {
  flex: 1;
  position: relative;
}

.banner-right img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

@media (max-width: 900px) {
  .alumni-banner {
    flex-direction: column;
    height: auto;
  }

  .banner-left {
    padding: 24px;
    background: linear-gradient(
      to bottom,
      var(--c1) 0%, 
      var(--c1) 65%, 
      rgba(0,0,0,0) 100%
    );
  }

  .banner-right {
    height: 180px;
  }
}

/* ======== BANNIÈRE THÈSE DE DOCTORAT ======== */

.thesis-banner {
  display: block;
  width: 100%;
  border-radius: 20px;
  overflow: hidden;
  text-decoration: none;
  color: #ffffff;
  margin: 20px 0 30px;
  box-shadow: 0 8px 25px rgba(0,0,0,0.18);
  background: linear-gradient(
    to right,
    var(--c2) 0%,
    var(--c1) 40%,
    var(--c3) 100%
  );
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.thesis-banner:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(0,0,0,0.25);
}

.thesis-left {
  padding: 26px 32px;
}

.thesis-left h3 {
  margin: 0 0 8px;
  font-size: 1.4rem;
}

.thesis-left p {
  margin: 0 0 10px;
  max-width: 650px;
  line-height: 1.5;
  opacity: 0.95;
}

.thesis-link {
  font-weight: 600;
  font-size: 1.05rem;
  opacity: 0.97;
}

/* mobile */
@media (max-width: 900px) {
  .thesis-left {
    padding: 18px 20px;
  }

  .thesis-left h3 {
    font-size: 1.2rem;
  }

  .thesis-left p {
    font-size: 0.95rem;
  }
}

/* Container */
.panel-container {
  position: relative;
  overflow: hidden;
  width: 100%;
  height: auto;
}

/* Panneaux animés */
.panel {
  position: absolute;
  inset: 0;
  transition: transform 0.6s ease;
  opacity: 0;
  pointer-events: none;
}

/* panneau visible */
.panel.active {
  opacity: 1;
  pointer-events: auto;
  position: relative;
  transform: translateX(0);
}

/* panneau à droite (sortie) */
.panel.exit-right {
  transform: translateX(120%);
}

/* panneau à gauche (entrée) */
.panel.enter-left {
  transform: translateX(-120%);
}

/* Boutons */
.panel-buttons {
  margin-top: 20px;
  display: flex;
  gap: 15px;
}

.panel-buttons button {
  padding: 10px 20px;
  border-radius: 10px;
  border: none;
  background: var(--c1);
  color: white;
  font-size: 1rem;
  cursor: pointer;
  transition: 0.2s;
}

.panel-buttons button:hover {
  background: var(--c2);
}

/* ===== SLIDER ENTRE REPORTAGE & THESE ===== */
/* ===== SLIDER CONTAINER ===== */
/* ===== SLIDER CONTAINER ===== */

.feature-slider {
  position: relative;
  width: 100%;
  margin: 25px 0 10px;
  overflow: hidden;
}

/* base state: all slides hidden, stacked */
.feature-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: translateX(100%);
  transition: transform 0.6s ease, opacity 0.6s ease;
  pointer-events: none;
}

/* slide visible */
.feature-slide.is-current {
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
}

/* 🔐 fallback: si JS ne tourne pas, on montre quand même le 1er slide */
.feature-slide:first-child {
  position: relative;
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
}

/* hauteur des bannières (desktop) */
.feature-slider .alumni-banner,
.feature-slider .thesis-banner {
  height: 260px;
}
/* ===== BIG OVERLAY ARROWS FOR SLIDER ===== */

.feature-slider {
  position: relative; /* important for absolute arrows */
}

/* base style for both arrows */
.slider-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 52px;
  height: 52px;
  border-radius: 999px;
  border: none;
  background: rgba(0, 0, 0, 0.45);
  color: #ffffff;
  font-size: 2.2rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  transition:
    opacity 0.2s ease,
    background 0.2s ease,
    transform 0.2s ease;
  z-index: 10;
}

/* left & right positions */
.slider-arrow-left {
  left: 14px;
}

.slider-arrow-right {
  right: 14px;
}

/* hover effect on desktop: show arrows */
.feature-slider:hover .slider-arrow {
  opacity: 1;
}

/* click feedback */
.slider-arrow:active {
  transform: translateY(-50%) scale(0.95);
  background: rgba(0, 0, 0, 0.65);
}

/* MOBILE: no hover → arrows always visible and big tap area */
@media (max-width: 900px) {
  .slider-arrow {
    opacity: 0.95;
    width: 56px;
    height: 56px;
    font-size: 2.4rem;
  }

  .feature-slider:hover .slider-arrow {
    opacity: 0.95;
  }
}

/* mobile: hauteur auto */
@media (max-width: 900px) {
  .feature-slider .alumni-banner,
  .feature-slider .thesis-banner {
    height: auto;
  }

  .feature-slider {
    margin-top: 18px;
  }
}