/* ==========================================================================
   Clovantis — chat.css
   Floating assistant: launcher, panel, message stream, composer.
   ========================================================================== */

/* ---------- Launcher ------------------------------------------------------ */
.chat-launcher {
  position: fixed; z-index: 870;
  inset-block-end: var(--sp-5); inset-inline-end: var(--sp-5);
  display: inline-flex; align-items: center; gap: 0.65rem;
  padding: 0.5rem 1.05rem 0.5rem 0.5rem;
  border-radius: var(--r-pill);
  background: color-mix(in srgb, var(--bg-elevated) 92%, transparent);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
          backdrop-filter: blur(16px) saturate(150%);
  border: 1px solid var(--hairline);
  box-shadow: var(--shadow-md);
  color: var(--text);
  transition: transform 360ms var(--ease-spring), box-shadow var(--t-base), opacity 260ms, visibility 260ms;
}
:root[dir="rtl"] .chat-launcher { padding: 0.5rem 0.5rem 0.5rem 1.05rem; }
.chat-launcher:hover { transform: translateY(-3px); box-shadow: var(--glow); }
.chat-launcher__mark {
  position: relative; display: grid; place-items: center; flex: none;
  inline-size: 2.1rem; block-size: 2.1rem; border-radius: 50%;
  background: linear-gradient(140deg, var(--navy-700), var(--navy-990));
  border: 1px solid var(--hairline);
}
.chat-launcher__mark img { inline-size: 1.15rem; block-size: 1.15rem; border-radius: 2px; }
.chat-launcher__label { font-size: var(--step--1); font-weight: 500; white-space: nowrap; }
.chat-launcher__ping {
  position: absolute; inset-block-start: -1px; inset-inline-end: -1px;
  inline-size: 0.5rem; block-size: 0.5rem; border-radius: 50%;
  background: #3DDC8A; border: 2px solid var(--bg-elevated);
}
.chat-launcher[aria-expanded="true"] { opacity: 0; visibility: hidden; transform: scale(.9); }
@media (max-width: 520px) { .chat-launcher__label { display: none; } .chat-launcher { padding: 0.5rem; } }

/* Back-to-top moves to the opposite corner so the two never overlap */
.to-top { inset-inline-end: auto; inset-inline-start: var(--sp-5); }

/* ---------- Panel ---------------------------------------------------------- */
.chat {
  position: fixed; z-index: 875;
  inset-block-end: var(--sp-5); inset-inline-end: var(--sp-5);
  inline-size: min(25rem, calc(100vw - 2 * var(--sp-5)));
  max-block-size: min(38rem, calc(100svh - 2 * var(--sp-5)));
  display: grid; grid-template-rows: auto 1fr auto;
  background: var(--bg-elevated);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  opacity: 0; visibility: hidden; transform: translateY(16px) scale(.97);
  transform-origin: bottom right;
  transition: opacity 320ms var(--ease-out), transform 380ms var(--ease-out), visibility 320ms;
}
:root[dir="rtl"] .chat { transform-origin: bottom left; }
.chat[data-open="true"] { opacity: 1; visibility: visible; transform: none; }
@media (max-width: 560px) {
  .chat {
    inset: auto 0 0 0; inline-size: 100%;
    max-block-size: 88svh; border-radius: var(--r-lg) var(--r-lg) 0 0;
    border-inline: 0; border-block-end: 0;
  }
}

/* Header */
.chat__head {
  display: flex; align-items: center; gap: 0.7rem;
  padding: 0.85rem 0.9rem;
  border-block-end: 1px solid var(--hairline-soft);
  background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 9%, transparent), transparent);
}
.chat__avatar {
  display: grid; place-items: center; flex: none;
  inline-size: 2.2rem; block-size: 2.2rem; border-radius: 50%;
  background: linear-gradient(140deg, var(--navy-700), var(--navy-990));
  border: 1px solid var(--hairline);
}
.chat__avatar img { inline-size: 1.2rem; block-size: 1.2rem; border-radius: 2px; }
.chat__id { display: grid; gap: 0.05rem; min-inline-size: 0; flex: 1; }
.chat__id b { font-size: var(--step--1); font-weight: 600; letter-spacing: -0.01em; }
.chat__id span { font-size: var(--step--2); color: var(--text-muted); display: inline-flex; align-items: center; gap: 0.35rem; }
.chat__id i { inline-size: 0.4rem; block-size: 0.4rem; border-radius: 50%; background: #3DDC8A; display: block; flex: none; }
.chat__head .icon-btn { inline-size: 2rem; block-size: 2rem; }
.chat__head .icon-btn svg { inline-size: 0.95rem; block-size: 0.95rem; }

/* Message stream */
.chat__log {
  overflow-y: auto; overscroll-behavior: contain;
  padding: var(--sp-5) 0.9rem;
  display: grid; gap: 0.7rem; align-content: start;
  scrollbar-width: thin; scrollbar-color: var(--hairline-loud) transparent;
}
.chat__log::-webkit-scrollbar { inline-size: 6px; }
.chat__log::-webkit-scrollbar-thumb { background: var(--hairline-loud); border-radius: 3px; }

.msg {
  max-inline-size: 86%;
  padding: 0.7rem 0.95rem;
  border-radius: var(--r-md);
  font-size: var(--step--1); line-height: 1.6;
  animation: msg-in 420ms var(--ease-out) both;
}
@keyframes msg-in { from { opacity: 0; transform: translateY(8px); } }
.msg--bot {
  justify-self: start;
  background: var(--surface); border: 1px solid var(--hairline-soft);
  color: var(--text-soft);
  border-start-start-radius: var(--r-xs);
}
.msg--user {
  justify-self: end;
  background: var(--accent-strong); color: #fff;
  border-end-end-radius: var(--r-xs);
}
.msg strong { color: var(--text); font-weight: 600; }
.msg--user strong { color: #fff; }
.msg a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.msg--bot ul { display: grid; gap: 0.3rem; margin-block-start: 0.45rem; }
.msg--bot li { display: flex; gap: 0.5rem; }
.msg--bot li::before { content: ""; flex: none; margin-block-start: 0.6em; inline-size: 0.28rem; block-size: 0.28rem; border-radius: 50%; background: var(--accent); }

.msg__cta {
  display: inline-flex; align-items: center; gap: 0.4rem;
  margin-block-start: 0.6rem; padding: 0.45rem 0.85rem;
  border-radius: var(--r-pill); border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
  background: var(--accent-soft); color: var(--accent);
  font-size: var(--step--2); font-weight: 500; text-decoration: none;
  transition: background-color var(--t-fast), transform var(--t-fast);
}
.msg__cta:hover { background: color-mix(in srgb, var(--accent) 22%, transparent); transform: translateY(-1px); text-decoration: none; }

/* Typing indicator */
.typing { display: inline-flex; gap: 0.25rem; align-items: center; padding-block: 0.3rem; }
.typing span {
  inline-size: 0.35rem; block-size: 0.35rem; border-radius: 50%;
  background: var(--text-muted); animation: blink 1.3s var(--ease-in-out) infinite;
}
.typing span:nth-child(2) { animation-delay: .18s; }
.typing span:nth-child(3) { animation-delay: .36s; }
@keyframes blink { 0%, 60%, 100% { opacity: .25; transform: translateY(0); } 30% { opacity: 1; transform: translateY(-2px); } }

/* Quick replies */
.chat__chips {
  display: flex; flex-wrap: wrap; gap: 0.4rem;
  padding: 0 0.9rem 0.7rem;
}
.chat__chips:empty { display: none; }
.chip {
  padding: 0.42rem 0.8rem; border-radius: var(--r-pill);
  border: 1px solid var(--hairline); background: var(--surface);
  font-size: var(--step--2); color: var(--text-soft); text-align: start;
  transition: all var(--t-fast) var(--ease-out);
  animation: msg-in 360ms var(--ease-out) both;
}
.chip:hover { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }

/* Composer */
.chat__form {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.7rem 0.9rem 0.9rem;
  border-block-start: 1px solid var(--hairline-soft);
}
.chat__form input {
  flex: 1; min-inline-size: 0;
  padding: 0.7rem 0.95rem; border-radius: var(--r-pill);
  background: var(--surface); border: 1px solid var(--hairline); color: var(--text);
  font-size: var(--step--1);
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
.chat__form input::placeholder { color: var(--text-faint); }
.chat__form input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.chat__send {
  display: grid; place-items: center; flex: none;
  inline-size: 2.4rem; block-size: 2.4rem; border-radius: 50%;
  background: var(--accent-strong); color: #fff;
  transition: transform var(--t-fast) var(--ease-spring), opacity var(--t-fast);
}
.chat__send:hover { transform: scale(1.06); }
.chat__send:disabled { opacity: .4; cursor: not-allowed; transform: none; }
.chat__send svg { inline-size: 1rem; block-size: 1rem; }
:root[dir="rtl"] .chat__send svg { transform: scaleX(-1); }

.chat__disclaimer {
  grid-column: 1 / -1;
  padding: 0 0.9rem 0.75rem;
  font-size: var(--step--2); color: var(--text-faint); line-height: 1.5; text-align: center;
}
.chat__disclaimer a { color: var(--text-muted); text-decoration: underline; text-underline-offset: 2px; }

@media (prefers-reduced-motion: reduce) {
  .msg, .chip { animation: none; }
  .typing span { animation: none; opacity: .6; }
}