* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: sans-serif;
  background: #f5f6f7;
}

.header {
  text-align: center;
  text-transform: uppercase;
  padding: 32px 16px;
  background-color: #0a0a23;
  color: #fff;
  border-bottom: 4px solid #fdb347;
}

.header h1 {
  margin: 0;
  font-size: clamp(1.2rem, 4vw, 2rem);
  letter-spacing: 0.05em;
}

/* 
=======================
  GALLERY — BASE (mobile first)
  1 column on mobile (<480px)
=======================
*/
.gallery {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
  align-items: stretch;
  gap: 12px;
  max-width: 1400px;
  margin: 0 auto;
  padding: 16px 12px;
}

.gallery img {
  width: 100%;          /* full width on mobile */
  height: 220px;
  object-fit: cover;
  border-radius: 10px;
  display: block;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.gallery img:hover {
  transform: scale(1.03);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.18);
}

/* ghost element to keep last row left-aligned */
.gallery::after {
  content: "";
  width: 100%;
}

/* 
=======================
  SMALL TABLETS  ≥ 480px
  2 columns
=======================
*/
@media screen and (min-width: 480px) {
  .gallery img {
    width: calc(50% - 8px);   /* 2 per row */
    height: 240px;
  }

  .gallery::after {
    width: calc(50% - 8px);
  }
}

/* 
=======================
  TABLETS  ≥ 768px
  3 columns
=======================
*/
@media screen and (min-width: 768px) {
  .gallery {
    gap: 16px;
    padding: 24px 16px;
  }

  .gallery img {
    width: calc(33.33% - 12px);   /* 3 per row */
    height: 260px;
  }

  .gallery::after {
    width: calc(33.33% - 12px);
  }
}

/* 
=======================
  DESKTOP  ≥ 1024px
  3 columns, larger cards
=======================
*/
@media screen and (min-width: 1024px) {
  .gallery {
    gap: 20px;
    padding: 32px 20px;
  }

  .gallery img {
    width: calc(33.33% - 14px);
    height: 300px;
  }

  .gallery::after {
    width: calc(33.33% - 14px);
  }
}

/* 
=======================
  LARGE DESKTOP  ≥ 1200px
  fixed max card width, natural 3-4 columns
=======================
*/
@media screen and (min-width: 1200px) {
  .gallery img {
    width: 350px;
    height: 300px;
  }

  .gallery::after {
    width: 350px;
  }
}