/* --- Base layout --- */
body {
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  background: #071532; /* medium gray-blue */
  color: #ffffff;
  font-family: Helvetica, Arial, sans-serif;
  overflow-y: auto;
  height: auto;
  min-height: 100vh;
  position: relative;
}

/* --- Full-screen moving grid --- */
.grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #071532;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.15) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.15) 1px, transparent 1px),
    linear-gradient(to right, rgba(255, 255, 255, 0.25) 1px, transparent 30px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.25) 1px, transparent 60px);
  background-size: 60px 60px, 60px 60px, 300px 300px, 300px 300px;
  background-repeat: repeat;
  z-index: 0;
  cursor: grab;
  will-change: background-position;
  transition: background-image 0.3s ease;
}

/* --- Back button --- */
.back-button {
  position: fixed;
  top: 2rem;
  left: 2rem;
  text-decoration: none;
  color: #ffffff;
  font-family: 'Press Start 2P', monospace;
  font-size: 0.8rem;
  z-index: 10;
  transition: color 0.3s ease, transform 0.3s ease;
}

.back-button:hover {
  color: rgba(255, 255, 255, 0.8);
  transform: translateX(-4px);
}

/* --- Gallery --- */
.gallery {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: 0;
  width: 100%;
  z-index: 1;
}

.gallery img {
  width: 80vw;
  max-width: 1400px;
  height: auto;
  border-radius: 0; /* perfectly rectangular */
  object-fit: cover;
  display: block;
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.2);
  margin-bottom: -6px; /* slight overlap removes visible grid lines */
}

/* --- Text Panel --- */

  .sidebar-right {
    position: fixed;
    right: 3rem;
    top: 50%;
    transform: translateY(-50%);
    width: 18vw;
    max-width: 340px;
    color: #ffffff;
    font-size: 0.9rem;
    line-height: 1.6;
    z-index: 5;
    background: rgba(128, 128, 128, 0.7);
    backdrop-filter: blur(4px);
    padding: 1rem;
    border-radius: 8px;
  }