* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  background: #f5f6f8;
  color: #1f2329;
  line-height: 1.6;
}
header {
  background: #f6821f;
  color: #fff;
  padding: 1.5rem 1rem;
  text-align: center;
}
header h1 { margin: 0; font-size: 1.4rem; }
header .sub { margin: 0.3rem 0 0; opacity: 0.9; font-size: 0.9rem; }

.auth-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  max-width: 720px;
  margin: 1rem auto 0;
  padding: 0.6rem 1rem;
}
.auth-bar label { font-size: 0.85rem; color: #5a6068; }
.auth-bar input[type=password] {
  flex: 1 1 180px;
  min-width: 0;
  margin: 0;
  padding: 0.45rem 0.6rem;
  border: 1px solid #d0d3d9;
  border-radius: 8px;
  font-size: 0.9rem;
}
.auth-bar button { padding: 0.45rem 0.9rem; font-size: 0.9rem; }
.auth-status { font-size: 0.82rem; }
.auth-status.ok { color: #1f8b4c; }
.auth-status.ng { color: #8a9099; }

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  max-width: 720px;
  margin: 1rem auto 0;
  padding: 0 1rem;
}
.tab {
  flex: 1 1 auto;
  padding: 0.6rem 0.5rem;
  border: 1px solid #d0d3d9;
  background: #fff;
  border-radius: 8px 8px 0 0;
  cursor: pointer;
  font-size: 0.9rem;
}
.tab.active { background: #fff; border-bottom-color: #fff; font-weight: 700; color: #f6821f; }

main { max-width: 720px; margin: 0 auto; padding: 0 1rem 3rem; }
.panel { display: none; background: #fff; border: 1px solid #d0d3d9; border-radius: 0 0 12px 12px; padding: 1.2rem; }
.panel.active { display: block; }
.panel h2 { margin-top: 0; font-size: 1.1rem; }
.desc { color: #5a6068; font-size: 0.88rem; margin-top: -0.3rem; }

.categories { margin: 0.6rem 0; padding-left: 1.1rem; color: #5a6068; font-size: 0.85rem; }
.categories li { margin: 0.15rem 0; }
.categories b { color: #1f2329; }

textarea, input[type=file] { width: 100%; margin: 0.5rem 0; }
textarea { padding: 0.6rem; border: 1px solid #d0d3d9; border-radius: 8px; font-size: 0.95rem; resize: vertical; }

.actions { display: flex; gap: 0.5rem; margin: 0.5rem 0; }
button {
  background: #f6821f;
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 0.55rem 1.1rem;
  font-size: 0.95rem;
  cursor: pointer;
}
button:disabled { background: #c8ccd2; cursor: not-allowed; }
button.tab { color: #5a6068; background: #f0f1f3; }
button.tab.active { color: #f6821f; background: #fff; }

.output {
  white-space: pre-wrap;
  word-break: break-word;
  background: #f7f8fa;
  border: 1px solid #e3e5e9;
  border-radius: 8px;
  padding: 0.8rem;
  min-height: 2.5rem;
  margin-top: 0.5rem;
  font-family: inherit;
  font-size: 0.95rem;
}
.output.loading { color: #8a9099; }
.output.error { color: #c0392b; }

#caption-preview, #image-output { max-width: 100%; border-radius: 8px; margin: 0.5rem 0; }
#image-download { display: inline-block; margin-top: 0.5rem; color: #f6821f; }