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

body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: #f5f5f5;
  color: #222;
}

header {
  background: #fff;
  border-bottom: 1px solid #ddd;
  padding: 1rem 2rem;
}

header h1 { margin: 0; font-size: 1.4rem; }

main {
  max-width: 640px;
  margin: 2rem auto;
  padding: 0 1rem;
}

#feed {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.post-card {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 8px;
  overflow: hidden;
}

.post-card img {
  width: 100%;
  display: block;
  max-height: 600px;
  object-fit: contain;
  background: #000;
}

.caption {
  padding: 0.75rem 1rem 0.25rem;
  margin: 0;
}

.date {
  display: block;
  padding: 0 1rem 0.75rem;
  color: #888;
  font-size: 0.8rem;
}

.load-more {
  text-align: center;
  padding: 1rem;
}

.load-more button {
  padding: 0.5rem 1.5rem;
  cursor: pointer;
  border: 1px solid #ccc;
  border-radius: 4px;
  background: #fff;
}

.empty-state {
  text-align: center;
  padding: 4rem 1rem;
  color: #888;
}