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

:root {
  --bg: #fafafa;
  --text: #1a1a1a;
  --dim: #999;
  --border: #e0e0e0;
  --hover: #f0f0f0;
  --green: #2a7d2a;
  --red: #c43c3c;
}

body {
  font-family: "SF Mono", "Fira Code", "Cascadia Code", Menlo, monospace;
  font-size: 13px;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.hidden { display: none !important; }

a { color: var(--text); }

/* Auth */
#auth-screen {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.auth-box h1 {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.auth-box p {
  color: var(--dim);
}

/* Header */
header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

header h1 { font-size: 13px; font-weight: 600; }

.home-link {
  color: var(--dim);
  text-decoration: none;
  font-weight: 400;
}

.home-link:hover { color: var(--text); }

.stats-bar {
  display: flex;
  gap: 1rem;
  font-size: 11px;
  color: var(--dim);
}

/* Upload Zone */
.upload-zone {
  border: 1px dashed var(--border);
  padding: 1.5rem;
  text-align: center;
  cursor: pointer;
  font-size: 12px;
  color: var(--dim);
  transition: border-color 0.15s, color 0.15s;
  margin-bottom: 1.5rem;
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--text);
  color: var(--text);
}

.upload-progress {
  text-align: center;
  font-size: 11px;
  color: var(--dim);
  margin-bottom: 1rem;
}

/* Image Grid */
.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.75rem;
}

.grid-item {
  cursor: pointer;
  border: 1px solid var(--border);
  overflow: hidden;
  position: relative;
  aspect-ratio: 1;
  background: var(--hover);
}

.grid-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.grid-item-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.6);
  color: #fff;
  font-size: 10px;
  padding: 3px 6px;
  display: flex;
  justify-content: space-between;
  opacity: 0;
  transition: opacity 0.15s;
}

.grid-item:hover .grid-item-info {
  opacity: 1;
}

/* Load More */
.load-more {
  display: block;
  width: 100%;
  margin-top: 1.5rem;
  padding: 0.5rem;
  background: none;
  border: 1px solid var(--border);
  font: inherit;
  font-size: 12px;
  color: var(--dim);
  cursor: pointer;
}

.load-more:hover {
  border-color: var(--text);
  color: var(--text);
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 100;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.modal-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.modal-actions {
  display: flex;
  gap: 1rem;
}

.modal-preview {
  display: flex;
  justify-content: center;
  margin-bottom: 1rem;
  background: var(--hover);
  padding: 1rem;
  border: 1px solid var(--border);
}

.modal-preview img {
  max-width: 100%;
  max-height: 60vh;
  object-fit: contain;
}

.modal-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 11px;
  color: var(--dim);
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}

/* Shared */
.link-btn {
  background: none;
  border: none;
  font: inherit;
  font-size: 11px;
  color: var(--dim);
  cursor: pointer;
  padding: 0;
}

.link-btn:hover { color: var(--text); }
.link-btn.delete-btn:hover { color: var(--red); }
.link-btn.copied { color: var(--green); }

/* Mobile */
@media (max-width: 600px) {
  body {
    padding: 1rem;
    padding-top: max(1rem, env(safe-area-inset-top));
    padding-bottom: max(1rem, env(safe-area-inset-bottom));
    font-size: 14px;
  }

  .image-grid {
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 0.5rem;
  }

  .grid-item-info {
    opacity: 1;
  }

  .upload-zone {
    padding: 1.25rem;
    font-size: 13px;
  }

  .modal-inner {
    padding: 1rem;
    padding-top: max(1rem, env(safe-area-inset-top, 1rem));
  }

  .link-btn {
    padding: 8px 4px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }

  .stats-bar {
    font-size: 10px;
    gap: 0.5rem;
  }
}