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

:root {
  --primary: #8019c8;
  --primary-dark: #6a14a8;
  --dark: #0c0c0c;
  --text: #333;
  --bg: #f5f5f5;
  --transition: 0.3s ease;
}

body {
  font-family: "Roboto", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== HEADER ===== */
.header {
  background: var(--dark);
  color: #fff;
  padding: 60px 0 40px;
  text-align: center;
}

.header h1 {
  font-size: 42px;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.header h1 span {
  color: var(--primary);
}

.header p {
  font-size: 18px;
  opacity: 0.8;
}

/* ===== FILTERS ===== */
.filters {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  padding: 40px 0 30px;
}

.filter-btn {
  padding: 10px 24px;
  border: 2px solid var(--primary);
  background: transparent;
  color: var(--primary);
  border-radius: 25px;
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}

.filter-btn:hover {
  background: var(--primary);
  color: #fff;
}

/* ===== FILTER RADIO LOGIC ===== */
#filter-all:checked ~ .container .gallery .gallery-item,
#filter-evenements:checked ~ .container .gallery .evenements,
#filter-paysages:checked ~ .container .gallery .paysages,
#filter-portraits:checked ~ .container .gallery .portraits {
  display: block;
}

#filter-evenements:checked ~ .container .gallery .portraits,
#filter-evenements:checked ~ .container .gallery .paysages,
#filter-paysages:checked ~ .container .gallery .portraits,
#filter-paysages:checked ~ .container .gallery .evenements,
#filter-portraits:checked ~ .container .gallery .evenements,
#filter-portraits:checked ~ .container .gallery .paysages {
  display: none;
}

#filter-all:checked ~ .container .filters label[for="filter-all"],
#filter-evenements:checked ~ .container .filters label[for="filter-evenements"],
#filter-paysages:checked ~ .container .filters label[for="filter-paysages"],
#filter-portraits:checked ~ .container .filters label[for="filter-portraits"] {
  background: var(--primary);
  color: #fff;
}

/* ===== GALLERY GRID ===== */
.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  padding-bottom: 60px;
}

.gallery-item {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  transition: transform var(--transition);
}

.gallery-item:hover {
  transform: translateY(-4px);
}

.gallery-item.featured {
  grid-column: span 2;
  grid-row: span 2;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  aspect-ratio: 1;
}

.gallery-item.featured img {
  aspect-ratio: 16/10;
}

/* ===== OVERLAY ===== */
.overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  color: #fff;
  text-align: center;
}

.gallery-item:hover .overlay {
  opacity: 1;
  visibility: visible;
}

.overlay h3 {
  font-size: 20px;
  text-transform: uppercase;
  margin-bottom: 8px;
  transform: translateY(10px);
  transition: transform var(--transition);
}

.gallery-item:hover .overlay h3 {
  transform: translateY(0);
}

.overlay p {
  font-size: 14px;
  opacity: 0.9;
  transform: translateY(10px);
  transition: transform var(--transition) 0.05s;
  line-height: 1.5;
}

.gallery-item:hover .overlay p {
  transform: translateY(0);
}

/* ===== FOOTER ===== */
.footer {
  background: var(--dark);
  color: #fff;
  text-align: center;
  padding: 20px 0;
  font-size: 14px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 992px) {
  .gallery {
    grid-template-columns: repeat(2, 1fr);
  }

  .gallery-item.featured {
    grid-column: span 2;
    grid-row: span 2;
  }

  .header h1 {
    font-size: 1.6rem;
  }
}

@media (max-width: 576px) {
  .gallery {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  .gallery-item.featured {
    grid-column: span 1;
    grid-row: span 1;
  }

  .gallery-item.featured img {
    aspect-ratio: 1;
  }

  .header {
    padding: 40px 0 30px;
  }

  .header h1 {
    font-size: 1.3rem;
  }

  .header p {
    font-size: 15px;
  }

  .filters {
    gap: 8px;
  }

  .filter-btn {
    padding: 8px 16px;
    font-size: 12px;
  }
}