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

body {
  background: #0a0a0f;
  color: #d0c8e0;
  font-family: 'Hiragino Mincho ProN', Georgia, serif;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  user-select: none;
}

/* 上部：時計・日付 */
#clock-area {
  text-align: center;
  padding: 20px 0 8px;
  flex-shrink: 0;
}

#clock {
  font-size: 2.8rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  color: #c8b8e8;
}

#date {
  font-size: 0.85rem;
  color: #7a6a8a;
  margin-top: 4px;
  letter-spacing: 0.05em;
}

/* 中央：メッセージ */
#center-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  padding-bottom: 24px;
}

#message-box {
  min-height: 3.5rem;
  max-width: 80vw;
  text-align: center;
  font-size: 1.05rem;
  line-height: 1.9;
  color: #e8e0f0;
  letter-spacing: 0.03em;
  white-space: pre-wrap;
  transition: opacity 0.4s ease;
}

#message-box.thinking {
  color: #5a4a6a;
  font-style: italic;
}

/* 下部：入力欄 */
#input-area {
  flex-shrink: 0;
  padding: 12px 16px 32px;
  display: flex;
  gap: 10px;
  align-items: flex-end;
  border-top: 1px solid #1e1828;
  background: #0a0a0f;
}

#user-input {
  flex: 1;
  background: #12101a;
  border: 1px solid #2a2040;
  border-radius: 20px;
  padding: 12px 16px;
  color: #d0c8e0;
  font-size: 1rem;
  font-family: inherit;
  resize: none;
  outline: none;
  line-height: 1.5;
  max-height: 120px;
  overflow-y: auto;
}

#user-input::placeholder {
  color: #3a3050;
}

#send-btn {
  background: #2a1a3e;
  border: 1px solid #3a2a50;
  border-radius: 50%;
  width: 44px;
  height: 44px;
  color: #c8b8e8;
  font-size: 1.1rem;
  cursor: pointer;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
  -webkit-tap-highlight-color: transparent;
}

#send-btn:active {
  background: #3a2a50;
}