/* Base layout */
body {
  font-family: Arial, sans-serif;
  max-width: 720px;
  margin: 40px auto;
  padding: 0 16px;
  line-height: 1.5;
}

.page-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 10px;
}

.qu-logo {
  height: 56px;
  width: auto;
  object-fit: contain;
  flex-shrink: 0;
}

h1 {
  font-size: 1.35rem;
  margin: 0 0 2px;
}

.subtitle {
  color: #555;
  font-size: 0.95rem;
  margin: 0 0 4px;
}

.authors {
  color: #777;
  font-size: 0.85rem;
  margin: 0 0 4px;
}

.repo-link {
  margin: 0 0 20px;
  font-size: 0.85rem;
}

.repo-link a {
  color: #1a5fb4;
}

.repo-link a:hover {
  text-decoration: underline;
}

h2 {
  font-size: 1.1rem;
  margin-top: 0;
}

.card {
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 20px;
}

.row {
  margin: 12px 0;
}

label {
  display: block;
  margin-bottom: 4px;
  font-weight: 600;
}

textarea {
  width: 100%;
  min-height: 100px;
  box-sizing: border-box;
  padding: 8px;
  font-family: inherit;
  font-size: 0.95rem;
}

select {
  padding: 6px 10px;
  font-size: 1rem;
  max-width: 100%;
  box-sizing: border-box;
}

button {
  padding: 8px 14px;
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
  box-sizing: border-box;
}

input[type="file"] {
  max-width: 100%;
  font-size: 0.95rem;
}

.msg {
  margin-top: 14px;
  font-weight: 600;
}

.ok {
  color: #0a7a2f;
}

.err {
  color: #b42318;
}

.answer {
  margin-top: 12px;
  white-space: pre-wrap;
  font-weight: normal;
  border-top: 1px solid #eee;
  padding-top: 12px;
}

.sources {
  margin-top: 10px;
  font-size: 0.9rem;
  color: #444;
  font-weight: normal;
  white-space: pre-wrap;
  font-family: ui-monospace, monospace;
  overflow-x: auto;
}

.context-debug {
  margin-top: 12px;
  font-size: 0.8rem;
  color: #333;
  font-weight: normal;
}

.context-debug pre {
  margin: 8px 0 0;
  padding: 10px;
  background: #f6f6f6;
  border: 1px solid #e0e0e0;
  border-radius: 6px;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

/* Phone and small tablets */
@media (max-width: 600px) {
  body {
    margin: 16px auto;
    padding: 0 12px;
  }

  .page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .qu-logo {
    height: 48px;
  }

  h1 {
    font-size: 1.2rem;
    line-height: 1.25;
  }

  .subtitle {
    font-size: 0.9rem;
  }

  .authors {
    margin-bottom: 4px;
  }

  .repo-link {
    margin-bottom: 16px;
  }

  .card {
    padding: 14px 12px;
  }

  h2 {
    font-size: 1.05rem;
  }

  textarea {
    min-height: 120px;
    font-size: 16px; /* avoids iOS zoom-on-focus */
  }

  select,
  input[type="file"] {
    font-size: 16px;
  }

  button {
    width: 100%;
    justify-content: center;
  }
}