* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Hiragino Sans", "Yu Gothic", sans-serif;
  background: #f5f6f8;
  color: #222;
}
header {
  background: #2b3a55;
  color: #fff;
  padding: 12px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
header a { color: #cdd8ff; text-decoration: none; font-size: 14px; }
main { max-width: 760px; margin: 0 auto; padding: 20px; }

/* --- チャット画面 --- */
#chat-log { display: flex; flex-direction: column; gap: 12px; margin-bottom: 16px; }
.msg { padding: 10px 14px; border-radius: 10px; max-width: 80%; white-space: pre-wrap; line-height: 1.6; }
.msg.user { align-self: flex-end; background: #2b3a55; color: #fff; }
.msg.assistant { align-self: flex-start; background: #fff; border: 1px solid #ddd; }
.msg.assistant.pending { color: #888; }
.sources { margin-top: 8px; font-size: 12px; color: #666; }
.sources span { display: inline-block; background: #eef1f7; border-radius: 6px; padding: 2px 8px; margin-right: 6px; }

#disclaimer { margin-top: 10px; font-size: 11px; color: #999; text-align: center; }
#chat-form { display: flex; gap: 8px; }
#question { flex: 1; padding: 10px; font-size: 15px; border: 1px solid #ccc; border-radius: 8px; }
button { padding: 10px 18px; border: none; border-radius: 8px; background: #2b3a55; color: #fff; font-size: 14px; cursor: pointer; }
button:disabled { background: #aaa; cursor: default; }

/* --- 管理画面 --- */
#dropzone {
  border: 2px dashed #99a3b8;
  border-radius: 10px;
  padding: 30px;
  text-align: center;
  color: #556;
  background: #fff;
  margin-bottom: 20px;
}
#dropzone.dragover { background: #eef1f7; border-color: #2b3a55; }
table { width: 100%; border-collapse: collapse; background: #fff; margin-bottom: 24px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid #eee; font-size: 14px; }
.status-badge { padding: 2px 8px; border-radius: 6px; font-size: 12px; background: #eef1f7; }
.status-badge.error { background: #fde2e2; color: #a33; }
.status-badge.done { background: #e2f5e6; color: #2a7; }
h2 { font-size: 16px; color: #2b3a55; }