:root {
  --bg: #161616;
  --panel: #1f1f1f;
  --text: #f2f2f2;
  --muted: #9a9a9a;
  --honjin: #d32f2f;
  --honjin-press: #962020;
  --toppa: #ef6c00;
  --onmitsu: #7b3fb5;
  --awase: #2e9b4f;
  --teikei: #e8e8e8;
  --teikei-text: #1a1a1a;
  --grey: #555;
  --machigai: #c2410c;
  --ok: #2e9b4f;
  --err: #d32f2f;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  font-size: 16px;
}

body {
  padding-bottom: env(safe-area-inset-bottom);
}

h2 {
  font-size: 0.85rem;
  font-weight: 700;
  margin: 14px 4px 6px;
  letter-spacing: 0.05em;
}
.sec-toppa { color: var(--toppa); }
.sec-onmitsu { color: var(--onmitsu); }
.sec-awase { color: var(--awase); }
.sec-teikei { color: var(--muted); }

/* ---- ボタン共通 ---- */
.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  border: none;
  border-radius: 12px;
  color: #fff;
  font-size: 1.05rem;
  font-weight: 700;
  padding: 16px 10px;
  min-height: 58px;
  cursor: pointer;
  user-select: none;
  text-align: center;
  line-height: 1.25;
  transition: transform 0.05s ease, filter 0.1s ease;
}
.btn:active { transform: scale(0.97); filter: brightness(0.85); }
.btn:disabled { opacity: 0.55; }

.honjin { background: var(--honjin); }
.honjin-xl { font-size: 1.55rem; min-height: 92px; margin-bottom: 8px; }
.honjin-lg { font-size: 1.15rem; min-height: 68px; }
.toppa { background: var(--toppa); }
.onmitsu { background: var(--onmitsu); }
.awase { background: var(--awase); }
.teikei { background: var(--teikei); color: var(--teikei-text); }
.machigai { background: var(--machigai); font-size: 1.2rem; min-height: 64px; border: 2px solid #fff3; }
.kaijo { background: var(--grey); }
.test { background: var(--grey); }

/* ---- レイアウト ---- */
.grid2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

main { padding: 8px 10px 12px; }
section { margin-bottom: 6px; }

.sticky-top {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--bg);
  padding: 8px 10px 10px;
  box-shadow: 0 4px 10px #0008;
}
.title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}
.title { font-size: 0.95rem; font-weight: 700; color: var(--muted); }
.sender-btn {
  background: var(--panel);
  color: var(--text);
  border: 1px solid #333;
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 0.8rem;
}

.sticky-bottom {
  position: sticky;
  bottom: 0;
  z-index: 20;
  background: var(--bg);
  padding: 10px 10px calc(10px + env(safe-area-inset-bottom));
  box-shadow: 0 -4px 10px #0008;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* ---- 自由入力TTS ---- */
.free-tts textarea {
  width: 100%;
  background: var(--panel);
  color: var(--text);
  border: 1px solid #333;
  border-radius: 10px;
  padding: 10px;
  font-size: 1rem;
  resize: none;
}
.free-tts-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 8px;
}
.free-tts-row .btn { width: auto; flex: 1; }
.count { color: var(--muted); font-size: 0.8rem; white-space: nowrap; }

/* ---- バナー / トースト ---- */
.error-banner {
  position: sticky;
  top: 0;
  z-index: 30;
  background: var(--err);
  color: #fff;
  text-align: center;
  padding: 8px;
  font-weight: 700;
  font-size: 0.9rem;
}
.hidden { display: none; }

.toast-container {
  position: fixed;
  left: 50%;
  bottom: 120px;
  transform: translateX(-50%);
  z-index: 50;
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: calc(100% - 32px);
  max-width: 420px;
  pointer-events: none;
}
.toast {
  background: #333;
  color: #fff;
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 700;
  text-align: center;
  box-shadow: 0 4px 16px #0009;
  animation: toast-in 0.15s ease;
}
.toast.ok { background: var(--ok); }
.toast.err { background: var(--err); }
.toast.warn { background: var(--toppa); }
@keyframes toast-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}