/* ─── Page shell ────────────────────────────────────────────── */

.rs-page {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  background: var(--bg-base);
}

.rs-main {
  flex: 1;
  display: flex;
  justify-content: center;
  overflow: hidden;
  padding-top: 58px;
}

/* ─── Navbar active state ────────────────────────────────────── */

.rs-navbar-active {
  box-shadow: 0 0 0 2px rgba(91, 141, 238, 0.4);
}

/* ─── Chat root ─────────────────────────────────────────────── */

.rs-chat-root {
  width: 100%;
  max-width: 720px;
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 0 1.25rem;
}

/* ─── Thread (scrollable) ───────────────────────────────────── */

.rs-thread {
  flex: 1;
  overflow-y: auto;
  padding: 2rem 0 1rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.rs-thread::-webkit-scrollbar {
  width: 4px;
}

.rs-thread::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: var(--radius-full);
}

/* ─── Message rows ──────────────────────────────────────────── */

.rs-msg-row {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  animation: fade-up 0.25s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.rs-msg-row--bot {
  flex-direction: row;
}

.rs-msg-row--user {
  flex-direction: row-reverse;
}

/* ─── Bot avatar ─────────────────────────────────────────────── */

.rs-avatar {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  background: rgba(91, 141, 238, 0.12)
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 22 22' fill='none'%3E%3Crect x='2' y='7' width='11' height='11' rx='2' fill='%235b8dee' fill-opacity='0.9'/%3E%3Crect x='9' y='2' width='11' height='11' rx='2' fill='%2382acf3' fill-opacity='0.8'/%3E%3C/svg%3E")
    center / 16px 16px no-repeat;
  border: 1px solid rgba(91, 141, 238, 0.22);
  flex-shrink: 0;
  margin-top: 2px;
}

/* ─── Bubbles ────────────────────────────────────────────────── */

.rs-bubble {
  max-width: 80%;
  padding: 0.6875rem 1rem;
  border-radius: var(--radius-lg);
  font-size: 0.9375rem;
  line-height: 1.6;
}

.rs-bubble--bot {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-top-left-radius: var(--radius-sm);
}

.rs-bubble--user {
  background: var(--accent);
  border: 1px solid rgba(91, 141, 238, 0.3);
  color: #ffffff;
  border-top-right-radius: var(--radius-sm);
}

/* ─── Typing indicator ──────────────────────────────────────── */

.rs-bubble--typing {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 0.75rem 1rem;
  min-width: 58px;
}

@keyframes rs-dot-bounce {
  0%, 80%, 100% { transform: translateY(0); opacity: 0.4; }
  40%            { transform: translateY(-5px); opacity: 1; }
}

.rs-typing-dot {
  display: block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-secondary);
  animation: rs-dot-bounce 1.2s infinite ease-in-out;
}

.rs-typing-dot:nth-child(1) { animation-delay: 0s; }
.rs-typing-dot:nth-child(2) { animation-delay: 0.2s; }
.rs-typing-dot:nth-child(3) { animation-delay: 0.4s; }

/* ─── Input area ─────────────────────────────────────────────── */

.rs-input-area {
  padding: 1rem 0 1.75rem;
  border-top: 1px solid var(--border);
  min-height: 80px;
  display: flex;
  align-items: flex-start;
}

/* ─── Option chips ───────────────────────────────────────────── */

.rs-chips {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
}

.rs-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.4375rem 0.875rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 450;
  color: var(--text-secondary);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.rs-chip:hover {
  border-color: var(--border-accent);
  color: var(--text-primary);
  background: var(--bg-elevated);
}

/* ─── Generate button ────────────────────────────────────────── */

.rs-generate-row {
  width: 100%;
  display: flex;
  justify-content: center;
  padding-top: 0.25rem;
}

.rs-generate-btn {
  padding: 0.6875rem 2rem;
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 600;
  color: #ffffff;
  background: var(--accent);
  border: 1px solid rgba(91, 141, 238, 0.28);
  cursor: pointer;
  transition: background 0.18s, box-shadow 0.18s, transform 0.18s;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.rs-generate-btn:hover:not(:disabled) {
  background: var(--accent-dim);
  box-shadow: 0 0 24px rgba(91, 141, 238, 0.38);
  transform: translateY(-1px);
}

.rs-generate-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}