/* ============ ARC CHAT WIDGET (floating, all pages) ============ */

.arcw {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  font-family: 'Geist', 'Inter', system-ui, sans-serif;
  cursor: auto;
}

.arcw__btn {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--fg);
  color: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(0,0,0,.35);
  transition: transform var(--t-fast), background var(--t-fast);
  position: relative;
}
.arcw__btn:hover { transform: translateY(-2px); }
.arcw__btn svg { width: 26px; height: 26px; }
.arcw__live {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: oklch(0.78 0.20 120);
  box-shadow: 0 0 0 3px var(--bg);
}
.arcw__btn--open .arcw__live { display: none; }

.arcw__panel {
  position: absolute;
  bottom: 76px;
  right: 0;
  width: 380px;
  height: 560px;
  max-height: calc(100vh - 120px);
  background: var(--bg-2);
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  opacity: 0;
  transform: translateY(8px) scale(.98);
  pointer-events: none;
  transition: opacity var(--t-fast), transform var(--t-fast);
}
.arcw--open .arcw__panel {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.arcw__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  flex-shrink: 0;
}
.arcw__head-id {
  display: flex;
  align-items: center;
  gap: 10px;
}
.arcw__avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--line);
  position: relative;
  background: var(--bg-3);
}
.arcw__avatar::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: oklch(0.78 0.20 120);
  border: 2px solid var(--bg-2);
}
.arcw__name {
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--fg);
}
.arcw__sub {
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 10px;
  color: var(--fg-2);
  margin-top: 2px;
}
.arcw__head-actions {
  display: flex;
  gap: 4px;
}
.arcw__icon-btn {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--fg-2);
  transition: color var(--t-fast);
}
.arcw__icon-btn:hover { color: var(--fg); }
.arcw__icon-btn svg { width: 16px; height: 16px; }

.arcw__log {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.arcw__msg { max-width: 85%; }
.arcw__msg-label {
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 9px;
  letter-spacing: .1em;
  color: var(--fg-3);
  margin-bottom: 4px;
}
.arcw__msg-body {
  font-size: 14px;
  line-height: 1.45;
  padding: 10px 12px;
  background: var(--bg-3);
  color: var(--fg);
  border: 1px solid var(--line);
  white-space: pre-wrap;
  word-wrap: break-word;
}
.arcw__msg--user { align-self: flex-end; text-align: right; }
.arcw__msg--user .arcw__msg-body {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}
.arcw__msg--typing .arcw__msg-body::after {
  content: '●';
  animation: arcw-pulse 1s infinite;
}
@keyframes arcw-pulse { 0%, 100% { opacity: .3 } 50% { opacity: 1 } }

.arcw__form {
  border-top: 1px solid var(--line);
  padding: 10px 12px;
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}
.arcw__input {
  flex: 1;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--fg);
  padding: 10px 12px;
  font: inherit;
  font-size: 14px;
  outline: none;
  transition: border-color var(--t-fast);
}
.arcw__input:focus { border-color: var(--fg-2); }
.arcw__send {
  background: var(--fg);
  color: var(--bg);
  padding: 0 14px;
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  transition: opacity var(--t-fast);
}
.arcw__send:hover { opacity: .85; }
.arcw__send:disabled { opacity: .4; cursor: not-allowed; }

/* Mobile: full-screen panel */
@media (max-width: 560px) {
  .arcw { bottom: 16px; right: 16px; }
  .arcw__panel {
    position: fixed;
    bottom: 0;
    right: 0;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    max-height: none;
  }
}