/* TTTM messenger — typography, surfaces and interaction states. */
.messenger-page { --chat-ink: #152c3e; --chat-muted: #627587; --chat-accent: #087c83; --chat-line: #e5ebef; }
.chat-icon { width: 19px; height: 19px; flex: 0 0 19px; vertical-align: middle; }
.chat-page-header { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding: 4px 0 24px; }
.chat-eyebrow { color: #657987; font-size: 10px; font-weight: 700; letter-spacing: 2px; }
.chat-page-header h2 { color: var(--chat-ink); font-size: clamp(28px, 3vw, 38px); line-height: 1.1; letter-spacing: -1.4px; margin: 9px 0; font-weight: 700; }
.chat-title-dot { color: var(--chat-accent); }
.chat-page-header p { margin: 0; font-size: 13px; color: var(--chat-muted); }
.chat-page-actions { display: flex; gap: 10px; }
.messenger-page .chat-page-actions .nut { display: inline-flex; justify-content: center; align-items: center; gap: 8px; min-height: 42px; padding: 10px 16px; border-radius: 10px; background: var(--chat-ink); box-shadow: 0 4px 10px #152c3e12; }
.messenger-page .chat-page-actions .nut.phu { background: #fff; color: var(--chat-ink); border: 1px solid #dce4e9; box-shadow: none; }
.messenger-page .chat-page-actions .nut:hover { background: #25465a; color: white; }
.messenger-page .chat-modern { height: min(800px, calc(100dvh - 245px)); min-height: 470px; grid-template-columns: 310px minmax(0, 1fr); border: 1px solid #dfe6eb; border-radius: 18px; box-shadow: 0 14px 50px -25px #20384c38; }
.messenger-page .chat-sidebar { background: #fcfdfe; border-right: 1px solid var(--chat-line); }
.messenger-page .chat-sidebar-head { padding: 24px 18px 12px; }
.chat-list-heading { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 16px; }
.chat-list-heading h3 { margin: 0; font-size: 16px; letter-spacing: -.3px; color: var(--chat-ink); }
.chat-count { color: #718391; font-size: 10px; font-weight: 500; white-space: nowrap; }
.chat-search-wrap { position: relative; }
.chat-search-wrap > svg { position: absolute; left: 12px; top: 12px; color: #718391; pointer-events: none; width: 17px; }
.messenger-page .chat-sidebar-head input { margin: 0 0 16px; padding: 12px 12px 12px 37px; border: 1px solid #edf1f4; background: #f1f5f7; font-size: 13px; }
.messenger-page .chat-filters { gap: 4px; padding-bottom: 12px; border-bottom: 1px solid var(--chat-line); }
.messenger-page .chat-filters button { border-radius: 7px; font-size: 12px; padding: 8px 12px; color: #657787; }
.messenger-page .chat-filters button[aria-pressed="true"] { color: #076970; background: #e7f3f2; }
.messenger-page #chat-nhom { padding: 0 10px 12px; scrollbar-width: thin; scrollbar-color: #ced8df transparent; }
.messenger-page .chat-group { position: relative; min-height: 78px; border: 1px solid transparent; padding: 13px 12px; gap: 12px; transition: background .15s, border-color .15s; }
.messenger-page .chat-group.selected { background: #eaf4f3; border-color: #d5eae7; }
.messenger-page .chat-group.selected::before { content: ''; position: absolute; width: 3px; height: 28px; background: var(--chat-accent); left: -1px; top: calc(50% - 14px); border-radius: 0 4px 4px 0; }
.messenger-page .chat-group:hover { background: #f0f5f6; }
.messenger-page .chat-avatar, .messenger-page .chat-group .chat-avatar { width: 43px; height: 43px; flex-basis: 43px; border-radius: 14px; background: #e1ecf1; color: #34556c; font-size: 13px; letter-spacing: .3px; border: 1px solid #fff9; }
.messenger-page .chat-group:nth-child(3n+2) .chat-avatar { background: #eee8e0; color: #846d4b; }
.messenger-page .chat-group:nth-child(3n) .chat-avatar { background: #e1eeea; color: #397466; }
.messenger-page .chat-group-copy strong { color: #203747; font-size: 13px; font-weight: 600; line-height: 1.45; }
.messenger-page .chat-group .chat-group-copy span { color: #758491; font-size: 11px; line-height: 1.7; margin-top: 3px; }
.messenger-page .chat-unread-badge { background: var(--chat-accent); font-size: 10px; min-width: 20px; padding: 3px 5px; text-align: center; }
.chat-sidebar-footer { display: flex; flex: 0 0 auto; gap: 11px; align-items: center; padding: 15px 22px; border-top: 1px solid var(--chat-line); background: #f8fafb; }
.chat-sidebar-footer strong { display: block; color: #294050; font-size: 12px; }
.chat-sidebar-footer > div { min-width: 0; overflow-wrap: anywhere; }
.chat-sidebar-footer small { display: block; color: #778996; margin-top: 4px; font-size: 10px; }
.messenger-page .chat-sidebar-footer .chat-avatar { width: 34px; height: 34px; flex-basis: 34px; border-radius: 11px; background: #193b4d; color: white; font-size: 11px; }
.messenger-page .chat-room > .thanh-toolbar { padding: 19px 26px 12px; border: 0; gap: 13px; }
.messenger-page .chat-room h3 { color: var(--chat-ink); font-size: 16px; letter-spacing: -.25px; }
.messenger-page #chat-goi { display: inline-flex; align-items: center; justify-content: center; gap: 8px; background: #eef7f5; color: #087078; border: 1px solid #dfede8; min-height: 40px; border-radius: 10px; font-size: 12px; }
.messenger-page #chat-goi:hover:not(:disabled) { background: #dcefeb; }
.messenger-page #chat-goi-huong-dan { padding: 0 26px 12px; color: #72828e; font-size: 11px; }
.messenger-page #chat-thanh-vien { padding: 0 26px 11px; margin: 0; border-bottom: 1px solid var(--chat-line); }
.messenger-page #chat-thanh-vien summary { font-size: 11px; color: #526a7a; }
.messenger-page #chat-thanh-vien p { line-height: 1.7; }
.messenger-page #chat-thanh-vien .nut { font-size: 11px; padding: 6px 10px; margin-bottom: 6px; }
.messenger-page .chat-messages { padding: 22px 30px; background: #f3f6f8; scrollbar-width: thin; scrollbar-color: #ced8df transparent; }
.chat-day { text-align: center; margin: 0 0 24px; clear: both; }
.chat-day:not(:first-child) { margin-top: 24px; }
.chat-day span { display: inline-block; background: #e8edf1; color: #6c7f8c; font-size: 10px; padding: 5px 12px; border-radius: 20px; }
.messenger-page .chat-message { background: white; border: 1px solid #e5ebef; border-radius: 3px 14px 14px; margin-bottom: 16px; box-shadow: 0 2px 3px #243b4d04; padding: 12px 16px; max-width: 76%; }
.messenger-page .chat-message strong { font-size: 10px; color: #567689; font-weight: 600; }
.messenger-page .chat-message p { margin: 6px 0; font-size: 14px; line-height: 1.65; color: #263e4e; }
.messenger-page .chat-message.mine { background: #183c4e; border-color: #183c4e; border-radius: 14px 3px 14px 14px; }
.messenger-page .chat-message.mine p { color: #f3f8fa; }
.messenger-page .chat-message.mine strong { color: #b4d3de; }
.messenger-page .chat-message time { color: #7c8e9b; font-size: 10px; margin-top: 5px; }
.messenger-page .chat-message.mine time { color: #afc9d3; }
.messenger-page #chat-gui { padding: 15px 22px; border-color: var(--chat-line); background: white; }
.messenger-page #chat-noi-dung { background: #f8fafb; border: 1px solid #e6edf1; border-radius: 11px; min-height: 58px; padding: 13px 15px; }
.messenger-page #chat-noi-dung:focus { background: white; border-color: #65a1a4; box-shadow: 0 0 0 3px #087c8310; }
.messenger-page .chat-compose-actions { margin-top: 10px; }
.messenger-page .chat-compose-actions small { color: #768794; font-size: 10px; }
.chat-compose-actions small span { padding: 0 6px; }
.messenger-page .chat-compose-actions .nut { display: inline-flex; width: auto; gap: 12px; align-items: center; justify-content: center; min-width: 92px; min-height: 40px; padding: 9px 17px; background: #08777e; border-radius: 9px; font-size: 12px; }
.messenger-page .chat-compose-actions .nut:hover { background: #06636a; }
.chat-welcome { display: flex; min-height: 100%; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 28px 12px; }
.chat-welcome > span { display: grid; place-items: center; width: 72px; height: 72px; border-radius: 24px; background: #e4eeef; color: #527c87; margin-bottom: 20px; transform: rotate(-5deg); }
.chat-welcome .chat-icon { width: 31px; height: 31px; }
.messenger-page .chat-welcome h3 { flex: 0; font-size: 22px; line-height: 1.4; color: #345365; margin-bottom: 12px; letter-spacing: -.5px; }
.chat-welcome p { color: #758894; font-size: 12px; line-height: 1.8; margin: 0; }
.messenger-page #chat-tao-hop, .messenger-page #chat-danh-ba-hop { border: 1px solid #dce5eb; border-radius: 14px; box-shadow: 0 8px 24px #1938490a; padding: 22px; }
.messenger-page button:focus-visible { outline: 3px solid #66aaad; outline-offset: 2px; }
@media (max-width: 1050px) and (min-width: 821px) { .messenger-page .chat-modern { grid-template-columns: 270px minmax(0, 1fr); } .chat-page-header { gap: 12px; } .chat-page-actions { gap: 6px; } }
@media (max-width: 820px) {
  .chat-page-header { align-items: flex-start; gap: 14px; padding: 4px 0 18px; flex-wrap: wrap; }
  .chat-page-header h2 { font-size: 29px; margin: 7px 0; }
  .chat-page-header p { font-size: 11px; }
  .chat-eyebrow { font-size: 8px; letter-spacing: 1.5px; }
  .chat-page-actions { margin-left: auto; }
  .messenger-page .chat-page-actions .nut { min-height: 38px; font-size: 11px; padding: 8px 11px; }
  .messenger-page .chat-modern { grid-template-columns: minmax(0, 1fr); height: calc(100dvh - 275px); min-height: 400px; border-radius: 14px; }
  .messenger-page .chat-sidebar-head { padding: 18px 16px 8px; }
  .messenger-page .chat-room > .thanh-toolbar { padding: 13px 12px 10px; gap: 8px; }
  .messenger-page .chat-room h3 { font-size: 14px; }
  .messenger-page #chat-goi { min-height: 36px; font-size: 11px; padding: 8px 10px; }
  .messenger-page #chat-goi-huong-dan { padding: 0 16px 10px; font-size: 10px; }
  .messenger-page #chat-thanh-vien { padding: 0 16px 10px; }
  .messenger-page .chat-messages { padding: 18px 14px; }
  .messenger-page .chat-message { max-width: 88%; padding: 10px 13px; }
  .messenger-page #chat-gui { padding: 12px; }
  .chat-sidebar-footer { padding: 12px 20px; }
  .messenger-page .chat-welcome h3 { font-size: 19px; }
}
@media (prefers-reduced-motion: reduce) { .messenger-page * { transition: none !important; } }