* { box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  margin: 0;
  background: #f6f7f9;
  color: #222;
}
header {
  background: #1f2937;
  color: #fff;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
header h1 { margin: 0; font-size: 1.25rem; }
header .logout button {
  background: transparent;
  color: #fff;
  border: 1px solid #fff;
  padding: 0.4rem 0.8rem;
  border-radius: 4px;
  cursor: pointer;
}
main { max-width: 1100px; margin: 2rem auto; padding: 0 1rem; }
section { background: #fff; padding: 1.5rem; border-radius: 8px; margin-bottom: 1.5rem; box-shadow: 0 1px 3px rgba(0,0,0,0.06); }
h2 { margin-top: 0; }
.login { max-width: 360px; margin: 4rem auto; background: #fff; padding: 2rem; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.1); }
.login label { display: block; margin: 0.5rem 0 0.25rem; font-weight: 500; }
.login input { width: 100%; padding: 0.5rem; font-size: 1rem; border: 1px solid #ccc; border-radius: 4px; }
.login button { margin-top: 1rem; width: 100%; padding: 0.6rem; background: #2563eb; color: #fff; border: none; border-radius: 4px; font-size: 1rem; cursor: pointer; }
.login .error { color: #b91c1c; }
.upload form { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; }
.upload input[type=file] { flex: 1; min-width: 16rem; }
.upload progress {
  flex-basis: 100%;
  height: 1.4rem;
  margin: 0.5rem 0 0;
  display: block;
}
.upload progress[hidden] { display: none; }
.upload #upload-status {
  flex-basis: 100%;
  margin-top: 0.25rem;
  font-size: 0.9rem;
  color: #4b5563;
}
.upload #upload-status.error { color: #b91c1c; }
.upload form.uploading button[type=submit] { opacity: 0.5; cursor: not-allowed; }
button { padding: 0.5rem 1rem; background: #2563eb; color: #fff; border: none; border-radius: 4px; cursor: pointer; font-size: 0.95rem; }
button.danger { background: #dc2626; }
button:hover { opacity: 0.9; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 0.6rem 0.5rem; border-bottom: 1px solid #eee; vertical-align: middle; }
th { background: #f3f4f6; font-weight: 600; }
td a { color: #2563eb; text-decoration: none; word-break: break-all; }
td a:hover { text-decoration: underline; }
td .empty { text-align: center; color: #6b7280; padding: 1.5rem; }
td form { margin: 0; }