/* C5–C6 mobile — event chat + read-only */

.m-chat {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  background: var(--color-background);
  position: relative;
}

.m-chat-head {
  flex-shrink: 0;
  padding: 8px 16px 10px;
  background: var(--color-surface);
  border-bottom: 1px solid color-mix(in srgb, var(--color-outline) 60%, transparent);
}

.m-chat-event {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--color-on-surface);
}

.m-chat-meta {
  margin: 0 0 8px;
  font-size: 0.78rem;
  color: var(--color-on-surface-variant);
  line-height: 1.35;
}

.m-chat-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
}

.m-chat-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  flex: 1;
  min-width: 0;
}

.m-chat-links a {
  font-size: 0.82rem;
  font-weight: 650;
  color: var(--color-primary);
  text-decoration: none;
}

.m-chat-count {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: 30px;
  padding: 0 10px;
  border-radius: 999px;
  border: 1px solid var(--color-outline);
  background: var(--color-surface-variant);
  font: inherit;
  font-size: 0.76rem;
  font-weight: 650;
  color: var(--color-on-surface);
  cursor: pointer;
  white-space: nowrap;
}

.m-chat-count:hover,
.m-chat-count[aria-expanded="true"] {
  border-color: color-mix(in srgb, var(--color-primary) 40%, var(--color-outline));
  background: var(--color-primary-container);
  color: var(--color-on-primary-container);
}

.m-chat-count svg {
  width: 12px;
  height: 12px;
  opacity: 0.7;
}

.m-chat-banner {
  flex-shrink: 0;
  margin: 10px 16px 0;
  padding: 10px 12px;
  border-radius: var(--radius);
  border: 1px solid var(--color-outline);
  background: var(--color-primary-container);
  color: var(--color-on-primary-container);
  font-size: 0.8rem;
  line-height: 1.4;
}

.m-chat-banner.is-muted {
  background: var(--color-surface-variant);
  color: var(--color-on-surface);
}

.m-chat-banner strong {
  display: block;
  margin-bottom: 2px;
  font-family: var(--font-display);
  font-weight: 650;
}

.m-chat-thread {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 12px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.m-chat-day {
  align-self: center;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-on-surface-variant);
  background: var(--color-surface-variant);
}

.m-msg {
  display: flex;
  gap: 8px;
  max-width: 88%;
}

.m-msg.is-mine {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.m-msg-av {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--color-surface-variant);
  font-size: 0.65rem;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 18px;
}

.m-msg-av.is-org,
.m-msg.is-mine .m-msg-av {
  background: var(--color-primary-container);
  color: var(--color-on-primary-container);
}

.m-msg-meta {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 3px;
  font-size: 0.68rem;
  color: var(--color-on-surface-variant);
}

.m-msg.is-mine .m-msg-meta {
  flex-direction: row-reverse;
}

.m-msg-meta strong {
  font-size: 0.76rem;
  font-weight: 650;
  color: var(--color-on-surface);
}

.m-msg-bubble {
  padding: 8px 11px;
  border-radius: 14px;
  background: var(--color-surface);
  border: 1px solid var(--color-outline);
  font-size: 0.86rem;
  line-height: 1.4;
}

.m-msg.is-mine .m-msg-bubble {
  background: var(--color-primary-container);
  border-color: color-mix(in srgb, var(--color-primary) 30%, var(--color-outline));
  color: var(--color-on-primary-container);
}

.m-msg.is-org .m-msg-bubble {
  background: color-mix(in srgb, var(--color-primary) 10%, var(--color-surface));
  border-color: color-mix(in srgb, var(--color-primary) 40%, var(--color-outline));
  border-left: 3px solid var(--color-primary);
}

.msg-org-badge {
  display: inline-flex;
  align-items: center;
  height: 16px;
  padding: 0 6px;
  border-radius: 999px;
  background: var(--color-primary-container);
  color: var(--color-on-primary-container);
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.m-msg-system {
  align-self: center;
  max-width: 90%;
  text-align: center;
  padding: 6px 10px;
  font-size: 0.74rem;
  line-height: 1.35;
  color: var(--color-on-surface-variant);
}

.m-chat-composer {
  flex-shrink: 0;
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 10px 12px calc(12px + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid color-mix(in srgb, var(--color-outline) 55%, transparent);
  background: color-mix(in srgb, var(--color-surface) 94%, transparent);
  backdrop-filter: blur(10px);
}

.m-chat-composer textarea {
  flex: 1;
  min-height: 40px;
  max-height: 100px;
  resize: none;
  padding: 10px 12px;
  border-radius: var(--radius);
  border: 1px solid var(--color-outline);
  background: var(--color-background);
  font: inherit;
  font-size: 0.88rem;
  line-height: 1.35;
  color: inherit;
}

.m-chat-composer textarea:focus {
  outline: 2px solid color-mix(in srgb, var(--color-primary) 45%, transparent);
  outline-offset: 1px;
}

.m-chat-composer .btn {
  flex-shrink: 0;
  height: 40px;
  padding: 0 14px;
  border-radius: var(--radius);
  border: none;
  background: var(--color-primary);
  color: var(--color-on-primary);
  font: inherit;
  font-size: 0.84rem;
  font-weight: 650;
  cursor: pointer;
}

.m-chat-readonly {
  flex-shrink: 0;
  padding: 14px 16px calc(16px + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid color-mix(in srgb, var(--color-outline) 55%, transparent);
  background: var(--color-surface-variant);
  text-align: center;
}

.m-chat-readonly p {
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.4;
  color: var(--color-on-surface-variant);
}

.m-chat .mock-state {
  margin: 0 0 10px;
}

/* Roster popup */
.m-chat-pop {
  position: absolute;
  inset: 0;
  z-index: 30;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  pointer-events: none;
  visibility: hidden;
}

.m-chat-pop.is-open {
  pointer-events: auto;
  visibility: visible;
}

.m-chat-pop-backdrop {
  position: absolute;
  inset: 0;
  border: none;
  padding: 0;
  margin: 0;
  background: color-mix(in srgb, #000 38%, transparent);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.18s ease;
}

.m-chat-pop.is-open .m-chat-pop-backdrop {
  opacity: 1;
}

.m-chat-pop-sheet {
  position: relative;
  z-index: 1;
  max-height: min(62%, 420px);
  display: flex;
  flex-direction: column;
  border-radius: 16px 16px 0 0;
  background: var(--color-surface);
  border: 1px solid color-mix(in srgb, var(--color-outline) 70%, transparent);
  border-bottom: 0;
  box-shadow: 0 -8px 28px color-mix(in srgb, #000 18%, transparent);
  transform: translateY(12px);
  opacity: 0;
  transition: transform 0.18s ease, opacity 0.18s ease;
}

.m-chat-pop.is-open .m-chat-pop-sheet {
  transform: translateY(0);
  opacity: 1;
}

.m-chat-pop-handle {
  width: 36px;
  height: 4px;
  margin: 10px auto 6px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--color-outline) 80%, transparent);
}

.m-chat-pop-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 4px 16px 10px;
  border-bottom: 1px solid color-mix(in srgb, var(--color-outline) 55%, transparent);
}

.m-chat-pop-top h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.m-chat-pop-close {
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 50%;
  background: var(--color-surface-variant);
  font-size: 1.2rem;
  line-height: 1;
  color: var(--color-on-surface-variant);
  cursor: pointer;
}

.m-chat-pop-list {
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 4px 16px calc(16px + env(safe-area-inset-bottom, 0px));
}

.m-chat-pop-list .m-person:first-child {
  border-top: 0;
  padding-top: 10px;
}

.m-chat-pop-list .m-person-avatar.is-org,
.m-chat-pop-list .m-person.is-you .m-person-avatar {
  background: var(--color-primary-container);
  color: var(--color-on-primary-container);
}