:root {
  --bg: #8cabd9;
  --bar: #ffffff;
  --text: #1a1a1a;
  --muted: #5b6573;
  --bubble-me: #06c755;
  --bubble-me-text: #ffffff;
  --ok: #06893c;
  --warn: #b3261e;
  --connecting: #c27c00;
  --composer: #ffffff;
  --field: #f2f3f5;
  --border: #d9dce1;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c2433;
    --bar: #11161f;
    --text: #eef1f5;
    --muted: #a3adbb;
    --bubble-me: #05a647;
    --ok: #4cd987;
    --warn: #ff8a80;
    --connecting: #ffc14d;
    --composer: #11161f;
    --field: #232c3b;
    --border: #2f3a4c;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
}

/* 画面全体を「実際に見えている範囲」に固定する。
   キーボードが出たときは app.js が高さを縮め、履歴の最後が隠れないようにする。 */
body {
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  height: 100dvh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", sans-serif;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: calc(env(safe-area-inset-top) + 10px) 16px 10px;
  background: var(--bar);
  border-bottom: 1px solid var(--border);
}

.title { font-weight: 700; font-size: 17px; margin-right: auto; }

.status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
}
.status .dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: currentColor;
}
.status-online { color: var(--ok); }
.status-connecting { color: var(--connecting); }
.status-offline { color: var(--warn); }

.conn-btn {
  flex: none;
  height: 32px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 14px;
  font-weight: 600;
}
.conn-btn.connect {
  border-color: var(--bubble-me);
  background: var(--bubble-me);
  color: #fff;
}

.log {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  -webkit-overflow-scrolling: touch;
}

.hint {
  align-self: center;
  max-width: 340px;
  padding: 12px 16px;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.18);
  color: #fff;
  font-size: 14px;
  line-height: 1.6;
  text-align: center;
}
.hint small { opacity: 0.85; }

.notice {
  align-self: center;
  max-width: 340px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.22);
  color: #fff;
  font-size: 13px;
  text-align: center;
}

.msg {
  align-self: flex-end;
  max-width: 82%;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}

.bubble {
  padding: 10px 14px;
  border-radius: 18px 18px 4px 18px;
  background: var(--bubble-me);
  color: var(--bubble-me-text);
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.5;
}

.meta {
  font-size: 12px;
  font-weight: 600;
  color: #fff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.35);
}
.meta.ok::before { content: "✓ "; }
.meta.ng {
  max-width: 100%;
  padding: 6px 10px;
  border-radius: 8px;
  background: #c62828;
  color: #fff;
  line-height: 1.5;
  text-shadow: none;
  white-space: pre-line;
  cursor: pointer;
}
.meta.ng::before { content: "⚠ "; }

.composer {
  padding: 6px 12px calc(env(safe-area-inset-bottom) + 8px);
  background: var(--composer);
  border-top: 1px solid var(--border);
}

.enter-option {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 2px 6px;
  padding: 2px 4px 6px;
  font-size: 13px;
  color: var(--text);
}
.enter-option input { width: 18px; height: 18px; margin: 0; accent-color: var(--bubble-me); }
.enter-option small { color: var(--muted); font-size: 12px; }

.composer-row {
  display: flex;
  align-items: flex-end;
  gap: 8px;
}

.composer textarea {
  flex: 1;
  min-height: 44px;
  max-height: 132px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: var(--field);
  color: var(--text);
  font: inherit;
  font-size: 17px;
  line-height: 1.4;
  resize: none;
  outline: none;
}
.composer textarea:focus { border-color: var(--bubble-me); }

.composer button {
  flex: none;
  height: 44px;
  min-width: 72px;
  padding: 0 16px;
  border: none;
  border-radius: 22px;
  background: var(--bubble-me);
  color: #fff;
  font: inherit;
  font-size: 16px;
  font-weight: 700;
}
.composer button:disabled { opacity: 0.4; }
.composer button:active:not(:disabled) { filter: brightness(0.9); }