/* AiMY QA shared session/chat components.

   One contract for conversation rows, message bubbles, typing, suggestions,
   and the overlay input across every surface. Page shells may still position
   the overlay/thread; typography, ratio, and message geometry live here. */
:root {
  --chat-font-family: "Urbanist", system-ui, sans-serif;
  --chat-max-width: 720px;
  --chat-msg-max-width: 540px;
  --chat-gap: 20px;
  --chat-bubble-padding-y: 12px;
  --chat-bubble-padding-x: 16px;
  --chat-bubble-line-height: 1.6;
  --chat-user-bubble-bg: rgba(var(--qa-accent-rgb), 0.08);
  --chat-user-bubble-border: rgba(var(--qa-accent-rgb), 0.22);
  --chat-frame-border: rgba(151, 187, 235, 0.18);
  --chat-input-font-size: 15px;
}

.overlay-thread {
  width: 100%;
  max-width: var(--chat-max-width);
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--chat-gap);
  transform: translateY(16px);
  transition: transform 300ms cubic-bezier(0.22, 1, 0.36, 1);
}
.aimy-overlay.open .overlay-thread { transform: translateY(0); }

.overlay-thread::-webkit-scrollbar { width: 4px; }
.overlay-thread::-webkit-scrollbar-track { background: transparent; }
.overlay-thread::-webkit-scrollbar-thumb { background: var(--wash-7); border-radius: 2px; }

.chat-msg {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 0 4px;
}
.chat-msg.user {
  flex-direction: row-reverse;
  justify-content: flex-start;
}

.msg-avatar {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}
.msg-avatar.aimy-av {
  background: rgba(70, 40, 140, 0.35);
  border: 1px solid rgba(139, 79, 244, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
}
.msg-avatar.aimy-av svg {
  width: 14px;
  height: 16px;
}
.msg-avatar.user-av {
  background: linear-gradient(135deg, #7c3aed, var(--brand));
  color: #fff;
  font-size: 9px;
}

.msg-bubble {
  max-width: var(--chat-msg-max-width);
  padding: var(--chat-bubble-padding-y) var(--chat-bubble-padding-x);
  border-radius: 12px;
  font-size: var(--fs-chat);
  font-weight: 400 !important;
  line-height: var(--chat-bubble-line-height);
  color: var(--d50);
  font-family: var(--chat-font-family);
}
.chat-msg.aimy .msg-bubble {
  background: transparent;
  border: 1px solid var(--wash-7);
  border-radius: 4px 12px 12px 12px;
}
.chat-msg.aimy.chat-evidence-msg .msg-bubble {
  max-width: 640px;
  padding: 0;
  background: transparent;
  border: 0;
  border-radius: 0;
}
.chat-msg.user .msg-bubble {
  background: var(--chat-user-bubble-bg) !important;
  border: 1px solid var(--chat-user-bubble-border);
  border-radius: 12px 4px 12px 12px;
  color: var(--d100);
}

.chat-call-frame {
  padding: 10px;
  margin: 14px 0;
  background: transparent;
  border: 1px solid var(--chat-frame-border);
  border-radius: 10px;
  backdrop-filter: blur(18px) saturate(1.2);
  -webkit-backdrop-filter: blur(18px) saturate(1.2);
}

.typing-dots {
  display: flex;
  gap: 4px;
  padding: 6px 4px;
  align-items: center;
}
.typing-dots span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--d500);
  animation: typingBounce 1.2s ease-in-out infinite;
}
.typing-dots span:nth-child(2) { animation-delay: 0.15s; }
.typing-dots span:nth-child(3) { animation-delay: 0.3s; }
@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-5px); opacity: 1; }
}

.overlay-input-wrap {
  width: 100%;
  max-width: var(--chat-max-width);
  flex-shrink: 0;
  transform: translateY(12px);
  opacity: 0;
  transition:
    transform 300ms 80ms cubic-bezier(0.22, 1, 0.36, 1),
    opacity 300ms 80ms ease;
}
.aimy-overlay.open .overlay-input-wrap {
  transform: translateY(0);
  opacity: 1;
}

.overlay-input-bar {
  background: transparent;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--wash-9);
  border-radius: 40px;
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.4),
    inset 0 1px 0 var(--wash-5);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 12px 12px 16px;
  transition:
    border-color var(--transition-base),
    box-shadow var(--transition-base);
}
.overlay-input-bar:focus-within {
  border-color: rgba(var(--qa-accent-rgb), 0.45);
  box-shadow:
    0 12px 40px rgba(0, 0, 0, 0.5),
    0 0 0 3px rgba(var(--qa-accent-rgb), 0.1),
    inset 0 1px 0 var(--wash-7);
}

.overlay-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  font-family: var(--chat-font-family);
  font-size: var(--chat-input-font-size);
  font-weight: 500;
  color: var(--d50);
  caret-color: var(--qa-accent);
  line-height: 1.4;
  resize: none;
  min-height: 24px;
  max-height: 120px;
  overflow-y: auto;
}
.overlay-input::placeholder {
  color: var(--d500);
  font-weight: 400;
}

.overlay-send {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--qa-accent);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), color var(--transition-fast), opacity var(--transition-fast);
  box-shadow: 0 2px 10px rgba(var(--qa-accent-rgb), 0.4);
}
.overlay-send:hover {
  box-shadow: 0 4px 20px rgba(var(--qa-accent-rgb), 0.55);
  transform: translateY(-1px);
}
.overlay-send svg {
  width: 15px;
  height: 15px;
  stroke: #fff;
}

.overlay-suggestions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding: 0 4px;
  justify-content: center;
  transition:
    opacity 200ms cubic-bezier(0.22, 1, 0.36, 1),
    transform 200ms cubic-bezier(0.22, 1, 0.36, 1),
    visibility 200ms;
}
.overlay-suggestions.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(6px);
}
.overlay-sugg-chip {
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  color: var(--d300);
  padding: 7px 14px;
  background: transparent;
  border: 1px solid var(--wash-8);
  border-radius: 20px;
  cursor: pointer;
}