/* =========================
   KAIWA — 会話 Chat Styles
========================= */

/* ── Setup card ──────────────────────────────────── */
.kw-setup-intro {
  font-size: 0.88rem;
  line-height: 1.7;
  opacity: 0.7;
  margin-bottom: 20px;
}

.kw-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.5;
  margin-bottom: 10px;
}

/* ── Level grid ──────────────────────────────────── */
.kw-level-section { margin-bottom: 22px; }

.kw-level-grid {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.kw-level-group-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  opacity: 0.4;
  margin-top: 10px;
  margin-bottom: 2px;
}

.kw-level-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  width: 100%;
  padding: 10px 14px;
  background: transparent;
  border: var(--stroke) solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  font-family: inherit;
  color: var(--ink);
  text-align: left;
  transition: border-color 120ms, background 120ms;
}
.kw-level-btn:hover {
  border-color: var(--accent-stroke);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}
.kw-level-btn.active {
  border-color: var(--accent-stroke);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
}

.kw-level-name {
  font-family: 'Kosugi Maru', sans-serif;
  font-size: 0.92rem;
}
.kw-level-desc {
  font-size: 0.76rem;
  opacity: 0.55;
}

/* ── Topic pills ─────────────────────────────────── */
.kw-topic-section { margin-bottom: 22px; }

.kw-topic-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.kw-topic-btn {
  padding: 6px 14px;
  border: var(--stroke) solid var(--border);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--ink);
  font-family: 'Kosugi Maru', sans-serif;
  font-size: 0.82rem;
  cursor: pointer;
  transition: border-color 120ms, background 120ms;
}
.kw-topic-btn:hover {
  border-color: var(--accent-stroke);
}
.kw-topic-btn.active {
  border-color: var(--accent-stroke);
  color: var(--accent-stroke);
  background: color-mix(in srgb, var(--accent-stroke) 8%, transparent);
}

/* ── Start button ────────────────────────────────── */
.kw-start-row {
  margin-top: 8px;
  text-align: center;
}
.kw-start-btn {
  font-size: 0.95rem;
  padding: 10px 32px;
}

/* ── Chat layout ─────────────────────────────────── */
.kw-chat-wrap {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  height: calc(100vh - 160px);
  min-height: 400px;
}

.kw-chat-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0 14px;
  border-bottom: var(--stroke) solid var(--border);
  margin-bottom: 12px;
  flex-shrink: 0;
}
.kw-chat-title {
  font-family: 'Kosugi Maru', sans-serif;
  font-size: 0.88rem;
  opacity: 0.7;
}

/* ── Messages area ───────────────────────────────── */
.kw-messages {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.kw-system-msg {
  text-align: center;
  font-size: 0.84rem;
  line-height: 1.7;
  opacity: 0.55;
  padding: 16px 12px;
}

/* ── Bubbles ─────────────────────────────────────── */
.kw-bubble {
  display: flex;
  max-width: 85%;
}

.kw-bubble-user {
  align-self: flex-end;
}
.kw-bubble-user .kw-bubble-inner {
  border: var(--stroke) solid var(--accent-stroke);
  border-radius: 16px 16px 4px 16px;
  padding: 10px 14px;
  font-family: 'Kosugi Maru', sans-serif;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--ink);
  background: color-mix(in srgb, var(--accent-stroke) 8%, transparent);
}

.kw-bubble-assistant {
  align-self: flex-start;
  flex-direction: column;
  gap: 8px;
}
.kw-bubble-assistant .kw-bubble-inner {
  border: var(--stroke) solid var(--border);
  border-radius: 16px 16px 16px 4px;
  padding: 10px 14px;
  font-family: 'Kosugi Maru', sans-serif;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--ink);
}
.kw-bubble-assistant .kw-conversation {
  /* main Japanese reply */
}

/* ── Correction block ────────────────────────────── */
.kw-correction {
  border: var(--stroke) solid var(--accent2-stroke);
  border-radius: 12px;
  padding: 10px 14px;
  background: color-mix(in srgb, var(--accent2-stroke) 6%, transparent);
}
.kw-correction-label {
  font-size: 0.72rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent2-stroke);
  margin-bottom: 6px;
}
.kw-correction-body {
  font-size: 0.84rem;
  line-height: 1.8;
  font-family: 'Funnel Display', sans-serif;
  font-weight: 300;
}
.kw-correction-body strong {
  font-weight: 500;
}

/* Strikethrough for wrong → right corrections */
.kw-strike {
  text-decoration: line-through;
  opacity: 0.5;
}

/* ── Typing indicator ────────────────────────────── */
.kw-typing .kw-bubble-inner {
  display: flex;
  gap: 5px;
  padding: 12px 18px;
}
.kw-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--muted);
  animation: kwBounce 1.2s infinite;
}
.kw-dot:nth-child(2) { animation-delay: 0.15s; }
.kw-dot:nth-child(3) { animation-delay: 0.30s; }
@keyframes kwBounce {
  0%, 60%, 100% { opacity: 0.3; transform: translateY(0); }
  30%           { opacity: 1;   transform: translateY(-4px); }
}

/* ── Input bar ───────────────────────────────────── */
.kw-input-bar {
  display: flex;
  gap: 8px;
  align-items: flex-end;
  padding: 12px 0 4px;
  border-top: var(--stroke) solid var(--border);
  flex-shrink: 0;
}
.kw-input {
  flex: 1;
  resize: none;
  border: var(--stroke) solid var(--border-strong);
  border-radius: 12px;
  padding: 10px 14px;
  font-family: 'Kosugi Maru', sans-serif;
  font-size: 0.92rem;
  line-height: 1.6;
  background: transparent;
  color: var(--ink);
  min-height: 44px;
  max-height: 120px;
}
.kw-input:focus {
  outline: none;
  border-color: var(--accent-stroke);
}
.kw-input::placeholder {
  font-family: 'Kosugi Maru', sans-serif;
  opacity: 0.4;
}

.kw-send-btn {
  flex-shrink: 0;
  padding: 10px 18px;
  font-size: 0.88rem;
}
.kw-send-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ── Mobile ──────────────────────────────────────── */
@media (max-width: 600px) {
  .kw-chat-wrap {
    height: calc(100vh - 140px);
    height: calc(100dvh - 140px);
  }
  .kw-bubble { max-width: 92%; }
  .kw-level-btn { padding: 8px 12px; }
  .kw-topic-btn { font-size: 0.78rem; padding: 5px 10px; }
}