/* ==================================================================
   TPM Expert — chat + voice widget
   Floating button bottom-right → expands to panel.
   Streaming responses with inline citation chips.
   Voice tap-to-talk.
   ================================================================== */

/* Floating launcher button */
.tpm-chat-fab {
  position: fixed; right: 22px; bottom: 22px; z-index: 60;
  width: 60px; height: 60px; border-radius: 50%;
  border: none; cursor: pointer;
  background: var(--grad-spine, linear-gradient(135deg, #3B82F6, #6366F1));
  color: #fff;
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.45);
  display: grid; place-items: center;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.tpm-chat-fab:hover { transform: translateY(-2px); box-shadow: 0 14px 36px rgba(99,102,241,.55); }
.tpm-chat-fab:focus-visible { outline: 3px solid #FBCFE8; outline-offset: 2px; }
.tpm-chat-fab svg { width: 26px; height: 26px; }
.tpm-chat-fab .label-kn {
  position: absolute; top: -12px; right: -10px;
  background: #fff; color: var(--engine, #3B82F6);
  font-weight: 800; font-size: 12px;
  padding: 3px 8px; border-radius: 999px;
  font-family: var(--font-kn, "Noto Sans Kannada", sans-serif);
  box-shadow: 0 4px 12px rgba(0,0,0,.18);
  pointer-events: none;
}
.tpm-chat-fab[aria-expanded="true"] { transform: scale(0.85); opacity: 0; pointer-events: none; }

/* Panel — desktop: docked bottom-right; mobile: full-screen sheet */
.tpm-chat-panel {
  position: fixed; right: 22px; bottom: 22px; z-index: 65;
  width: 400px; max-width: calc(100vw - 24px);
  height: 620px; max-height: calc(100vh - 80px);
  background: var(--paper, #FFFFFF);
  color: var(--ink, #0F172A);
  border-radius: 18px;
  box-shadow: 0 24px 80px rgba(15,23,42,.28), 0 6px 16px rgba(15,23,42,.12);
  display: flex; flex-direction: column;
  overflow: hidden;
  transform: translateY(20px) scale(0.96);
  opacity: 0; pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
  border: 1px solid var(--line-soft, #ECEFF5);
}
.tpm-chat-panel[data-open="true"] {
  opacity: 1; transform: translateY(0) scale(1); pointer-events: auto;
}
@media (max-width: 540px) {
  .tpm-chat-panel {
    right: 0; bottom: 0; left: 0;
    width: 100vw; height: 92vh; max-height: 92vh;
    border-radius: 18px 18px 0 0;
  }
}

/* Header */
.tpm-chat-header {
  padding: 14px 16px;
  background: var(--grad-spine, linear-gradient(135deg, #3B82F6, #6366F1));
  color: #fff;
  display: flex; align-items: center; gap: 10px;
}
.tpm-chat-header .avatar {
  width: 36px; height: 36px; border-radius: 10px;
  background: rgba(255,255,255,.18);
  display: grid; place-items: center;
  font-weight: 800; font-size: 16px;
  font-family: var(--font-kn, sans-serif);
}
.tpm-chat-header .titles { flex: 1; line-height: 1.1; }
.tpm-chat-header .name {
  font-size: 15px; font-weight: 800;
  display: flex; align-items: center; gap: 6px;
}
.tpm-chat-header .pill-beta {
  font-size: 9px; font-weight: 800; letter-spacing: 0.08em;
  background: rgba(0,0,0,.22); padding: 2px 6px; border-radius: 999px;
}
.tpm-chat-header .sub { font-size: 11px; opacity: 0.85; margin-top: 2px; }
.tpm-chat-header .icon-btn {
  background: rgba(255,255,255,.15); border: 0; border-radius: 8px;
  width: 32px; height: 32px; display: grid; place-items: center;
  color: #fff; cursor: pointer;
}
.tpm-chat-header .icon-btn:hover { background: rgba(255,255,255,.25); }

/* Transparency strip */
.tpm-chat-disclaimer {
  font-size: 11px; padding: 8px 14px; line-height: 1.4;
  background: var(--surface, #F1F5FA);
  color: var(--muted, #5B6776);
  border-bottom: 1px solid var(--line-soft, #ECEFF5);
}

/* Messages area */
.tpm-chat-messages {
  flex: 1; overflow-y: auto;
  padding: 14px;
  display: flex; flex-direction: column; gap: 12px;
  scroll-behavior: smooth;
}
.tpm-chat-messages::-webkit-scrollbar { width: 8px; }
.tpm-chat-messages::-webkit-scrollbar-thumb { background: var(--line, #DDE3EC); border-radius: 4px; }

.tpm-msg { display: flex; gap: 8px; max-width: 90%; }
.tpm-msg.user { align-self: flex-end; flex-direction: row-reverse; }
.tpm-msg .bubble {
  padding: 10px 14px; border-radius: 14px;
  font-size: 14px; line-height: 1.55;
  word-wrap: break-word;
}
.tpm-msg.bot .bubble {
  background: var(--surface, #F1F5FA);
  color: var(--ink, #0F172A);
  border-bottom-left-radius: 4px;
}
.tpm-msg.user .bubble {
  background: var(--grad-spine, linear-gradient(135deg, #3B82F6, #6366F1));
  color: #fff;
  border-bottom-right-radius: 4px;
}
.tpm-msg .bubble p { margin: 0 0 8px; }
.tpm-msg .bubble p:last-child { margin-bottom: 0; }
.tpm-msg .bubble strong { font-weight: 700; }

/* Streaming cursor */
.tpm-msg.bot .bubble.streaming::after {
  content: "▋";
  display: inline-block; margin-left: 2px;
  animation: tpm-blink 0.8s infinite;
  color: var(--engine, #3B82F6);
}
@keyframes tpm-blink { 0%, 50% { opacity: 1 } 51%, 100% { opacity: 0 } }

/* Citation chips */
.tpm-citations { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 8px; }
.tpm-citation {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 10.5px; font-weight: 600;
  padding: 3px 8px; border-radius: 999px;
  background: rgba(59, 130, 246, 0.12);
  color: var(--engine, #3B82F6);
  text-decoration: none;
  border: 1px solid rgba(59, 130, 246, 0.2);
  transition: background 0.15s;
}
.tpm-citation:hover { background: rgba(59, 130, 246, 0.22); }
.tpm-citation .num {
  font-size: 9.5px; font-weight: 800;
  background: var(--engine, #3B82F6); color: #fff;
  padding: 0 4px; border-radius: 4px; min-width: 12px; text-align: center;
}

/* Greeting / suggested prompts */
.tpm-greeting { padding: 4px 6px; color: var(--muted, #5B6776); font-size: 13px; }
.tpm-greeting p { margin: 0 0 12px; }
.tpm-suggestions { display: grid; gap: 6px; }
.tpm-suggestion {
  text-align: left; background: var(--paper, #fff);
  border: 1px solid var(--line, #DDE3EC); border-radius: 10px;
  padding: 10px 12px; font-size: 13px;
  color: var(--ink, #0F172A); cursor: pointer;
  transition: border-color 0.15s, transform 0.1s;
}
.tpm-suggestion:hover { border-color: var(--engine, #3B82F6); transform: translateX(2px); }
.tpm-suggestion .eyebrow {
  font-size: 10px; font-weight: 800; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--engine, #3B82F6);
  display: block; margin-bottom: 2px;
}

/* Composer */
.tpm-chat-composer {
  border-top: 1px solid var(--line-soft, #ECEFF5);
  padding: 10px 12px;
  display: flex; gap: 8px; align-items: flex-end;
  background: var(--paper, #FFFFFF);
}
.tpm-chat-composer textarea {
  flex: 1; resize: none;
  border: 1px solid var(--line, #DDE3EC); border-radius: 12px;
  padding: 10px 14px; font: inherit; font-size: 14px; line-height: 1.4;
  background: var(--chalk, #FAFBFD); color: var(--ink, #0F172A);
  max-height: 120px; min-height: 42px;
  outline: none;
  transition: border-color 0.15s;
}
.tpm-chat-composer textarea:focus { border-color: var(--engine, #3B82F6); }
.tpm-chat-composer textarea::placeholder { color: var(--muted-2, #8B95A3); }
.tpm-chat-composer .btn-icon {
  width: 42px; height: 42px; border-radius: 12px;
  border: 0; cursor: pointer;
  display: grid; place-items: center;
  flex: 0 0 42px;
  transition: background 0.15s, transform 0.1s;
}
.tpm-chat-composer .btn-send {
  background: var(--grad-spine, linear-gradient(135deg, #3B82F6, #6366F1));
  color: #fff;
}
.tpm-chat-composer .btn-send:hover { transform: translateY(-1px); }
.tpm-chat-composer .btn-send:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }
.tpm-chat-composer .btn-icon svg { width: 18px; height: 18px; }

/* Footer hint */
.tpm-chat-foot {
  padding: 6px 12px 10px; text-align: center;
  font-size: 10.5px; color: var(--muted-2, #8B95A3);
}
.tpm-chat-foot a { color: var(--engine, #3B82F6); }

/* Dark mode */
[data-theme="dark"] .tpm-chat-panel {
  background: var(--surface, #1E293B);
  color: var(--ink, #F1F5F9);
}
[data-theme="dark"] .tpm-suggestion { background: var(--surface-2, #334155); color: var(--ink, #F1F5F9); }
[data-theme="dark"] .tpm-chat-composer textarea { background: var(--surface-2, #334155); color: var(--ink, #F1F5F9); }