:root{
  --tf-blue:#168acd;
  --tf-blue-dark:#087fbd;
  --tf-blue-soft:#e8f4fb;
  --tf-text:#111418;
  --tf-muted:#8b9299;
  --tf-line:#e8eaed;
  --tf-panel:#fff;
  --tf-chat-bg:#e7edf1;
  --safe-top:env(safe-area-inset-top,0px);
  --safe-bottom:env(safe-area-inset-bottom,0px);
}
*{box-sizing:border-box}
html,body,#app{margin:0;width:100%;height:100%;min-height:100%;font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--tf-text)}
body{background:#fff;overflow:hidden}
button,input,textarea{font:inherit}
button{cursor:pointer;-webkit-tap-highlight-color:transparent}
.hidden{display:none!important}

/* Email authentication */
.auth{min-height:100%;height:100%;display:grid;place-items:center;padding:24px;background:linear-gradient(145deg,#e8f5fc,#f8fbfd);overflow:auto}
.auth-card{width:min(420px,94vw);background:#fff;border:1px solid #edf0f2;border-radius:22px;padding:34px 30px;box-shadow:0 18px 60px #17384b16}
.logo{width:68px;height:68px;border-radius:22px;display:grid;place-items:center;background:linear-gradient(145deg,#39a9e8,#117fbe);color:white;font-size:31px;font-weight:800;margin:0 auto 19px;box-shadow:0 8px 22px #168acd30}
.auth-card h1{text-align:center;margin:0 0 8px;font-size:25px;letter-spacing:-.45px}
.auth-card p{color:#7d8991;text-align:center;margin:0 0 20px;line-height:1.5}
.field{width:100%;height:49px;border:1px solid #dfe5e9;border-radius:11px;padding:0 14px;outline:none;margin:6px 0;background:#fff}
.field:focus{border-color:var(--tf-blue);box-shadow:0 0 0 3px #168acd18}
.primary{height:49px;width:100%;border:0;border-radius:11px;background:var(--tf-blue);color:#fff;font-weight:700;margin-top:9px}
.primary:hover{background:var(--tf-blue-dark)}
.foot{text-align:center;color:#a2abb1;font-size:12px;margin-top:19px}

/* Messenger shell */
.layout{height:100%;height:100dvh;width:100%;display:grid;grid-template-columns:380px minmax(0,1fr);background:#fff;overflow:hidden}
.sidebar{background:#fff;border-right:1px solid var(--tf-line);display:flex;flex-direction:column;min-width:0;min-height:0;z-index:2}
.list-header{height:61px;min-height:61px;padding:0 17px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;background:#fff}
.header-action{border:0;background:transparent;color:var(--tf-blue);padding:8px 0;font-size:16px;font-weight:500;justify-self:start}
.list-title{font-size:19px;font-weight:700;text-align:center;letter-spacing:-.2px}
.header-action.compose{justify-self:end;width:38px;height:38px;display:grid;place-items:center;padding:0}
.header-action svg{width:26px;height:26px;stroke:currentColor;stroke-width:1.8;fill:none;stroke-linecap:round;stroke-linejoin:round}
.search-wrap{padding:6px 17px 12px;border-bottom:1px solid #f0f1f2;background:#fff}
.search{height:40px;border-radius:10px;background:#f0f1f3;display:flex;align-items:center;padding:0 11px;gap:8px;color:#969da3}
.search svg{width:18px;height:18px;stroke:currentColor;stroke-width:2;fill:none;flex:none}
.search input{border:0;outline:0;background:transparent;width:100%;height:100%;font-size:16px;color:#222}
.search input::placeholder{color:#9ba1a6}
.chats{overflow-y:auto;overscroll-behavior:contain;flex:1;min-height:0;background:#fff;scrollbar-width:thin}
.chat{width:100%;min-height:91px;padding:11px 17px;border:0;border-bottom:1px solid #f0f1f2;background:#fff;display:flex;align-items:center;gap:14px;text-align:left;color:var(--tf-text);position:relative}
.chat:hover{background:#fafbfc}
.chat.active{background:#f1f8fc}
.avatar{width:64px;height:64px;border-radius:50%;background:linear-gradient(145deg,#83cce8,#368bc1);color:#fff;display:grid;place-items:center;font-size:24px;font-weight:600;flex:none;overflow:hidden;position:relative}
.avatar img{width:100%;height:100%;object-fit:cover;display:block}
.avatar.avatar-small{width:48px;height:48px;font-size:19px}
.avatar.avatar-large{width:54px;height:54px;font-size:22px}
.chat-main{flex:1;min-width:0;align-self:center}
.chat-topline{display:flex;align-items:center;gap:5px;min-width:0;margin-bottom:4px}
.chat-topline b{font-size:16.5px;line-height:1.2;font-weight:650;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0;flex:1}
.chat-time{font-size:13px;color:#8f969c;white-space:nowrap;align-self:flex-start;padding-left:5px}
.chat-preview{font-size:14.5px;line-height:1.35;color:#8a9197;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:block}
.chat-preview .preview-sender{color:#30363b}
.chat-trailing{display:flex;align-items:center;gap:7px;margin-top:5px;justify-content:flex-end;min-height:17px}
.unread{min-width:20px;height:20px;padding:0 6px;border-radius:11px;background:#168fe5;color:#fff;font-size:12px;font-weight:650;display:inline-flex;align-items:center;justify-content:center}
.pin{width:15px;height:15px;color:#a6adb2;display:inline-grid;place-items:center}
.pin svg{width:14px;height:14px;fill:currentColor}
.read-ticks{color:#45a5d6;font-size:15px;letter-spacing:-5px;font-weight:700;white-space:nowrap;padding-right:4px}
.verified-badge{width:16px;height:16px;border-radius:50%;background:#168fe5;color:#fff;display:inline-grid;place-items:center;flex:none;vertical-align:middle}
.verified-badge svg{width:10px;height:10px;stroke:#fff;stroke-width:2.5;fill:none;stroke-linecap:round;stroke-linejoin:round}
.premium-mark{color:#d2a23c;font-size:12px;vertical-align:middle}
.list-empty{padding:45px 20px;text-align:center;color:#929aa0;font-size:14px}
.bottom-tabs{height:68px;min-height:68px;padding:5px 7px calc(5px + var(--safe-bottom));border-top:1px solid #e9ebed;background:#fff;display:grid;grid-template-columns:repeat(4,1fr);align-items:center;z-index:3}
.nav-tab{border:0;background:transparent;color:#92999f;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:11px;min-width:0;height:56px;position:relative}
.nav-tab svg{width:27px;height:27px;stroke:currentColor;stroke-width:1.8;fill:none;stroke-linecap:round;stroke-linejoin:round}
.nav-tab.active{color:var(--tf-blue)}
.nav-tab.active svg{stroke-width:2.1}
.nav-tab .nav-badge{position:absolute;top:0;left:calc(50% + 5px);min-width:17px;height:17px;border-radius:10px;background:#ee4d55;color:white;font-size:10px;display:grid;place-items:center;padding:0 4px;border:1.5px solid white}

/* Conversation pane (desktop and mobile detail) */
.main{min-width:0;min-height:0;display:flex;flex-direction:column;background:var(--tf-chat-bg);position:relative}
.header{height:62px;min-height:62px;background:#fff;border-bottom:1px solid var(--tf-line);display:flex;align-items:center;gap:11px;padding:0 16px;z-index:1}
.back-chat{display:none;border:0;background:transparent;color:var(--tf-blue);font-size:16px;padding:8px 3px 8px 0;align-items:center;gap:3px}
.back-chat svg{width:20px;height:20px;stroke:currentColor;stroke-width:2;fill:none}
.header-copy{flex:1;min-width:0;display:flex;flex-direction:column;gap:3px}
.header-copy b{font-size:16px;font-weight:650;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.online{font-size:12px;color:var(--tf-muted)}
.header-tools{display:flex;gap:5px}
.header-tools .icon{border:0;background:transparent;width:39px;height:39px;border-radius:50%;display:grid;place-items:center;color:#7c858b}
.header-tools .icon svg{width:22px;height:22px;stroke:currentColor;stroke-width:1.8;fill:none;stroke-linecap:round;stroke-linejoin:round}
.messages{flex:1;overflow:auto;padding:22px max(5%,28px);background-color:#e6edf1;background-image:radial-gradient(#d4e0e6 1px,transparent 1px);background-size:18px 18px;overscroll-behavior:contain}
.day{width:max-content;margin:0 auto 16px;padding:5px 11px;background:#9aaab3a8;color:#fff;border-radius:14px;font-size:12px}
.msg{display:flex;margin:6px 0;align-items:flex-end}
.msg.mine{justify-content:flex-end}
.bubble{max-width:min(680px,78%);padding:9px 11px 6px;background:#fff;border-radius:14px 14px 14px 4px;box-shadow:0 1px 1px #0000000b;overflow-wrap:anywhere;font-size:15px;line-height:1.4}
.mine .bubble{background:#e1ffc7;border-radius:14px 14px 4px 14px}
.meta{font-size:11px;color:#8b969b;display:flex;justify-content:flex-end;gap:5px;margin-top:4px}
.composer{min-height:62px;background:#fff;display:flex;gap:7px;align-items:center;padding:7px 10px calc(7px + var(--safe-bottom));border-top:1px solid #e8ebed}
.composer .icon{border:0;background:transparent;width:38px;height:42px;border-radius:50%;display:grid;place-items:center;color:#879198;font-size:25px}
.composer input{border:0;outline:0;flex:1;min-width:0;height:42px;padding:0 9px;font-size:16px;background:transparent}
.composer input::placeholder{color:#9aa1a6}
.send{height:40px;width:40px;flex:none;border:0;border-radius:50%;background:var(--tf-blue);color:#fff;font-size:18px;display:grid;place-items:center}
.main-empty{margin:auto;text-align:center;color:#7d898f;padding:24px}
.main-empty .empty-symbol{width:70px;height:70px;margin:0 auto 14px;border-radius:50%;background:#d5e2e9;display:grid;place-items:center;color:#7e9aaa;font-size:30px}
.panel{position:fixed;right:16px;top:72px;width:340px;max-width:calc(100vw - 32px);background:#fff;border-radius:16px;box-shadow:0 14px 50px #0002;border:1px solid var(--tf-line);padding:15px;z-index:20}
.panel h3{margin:0 0 10px}
.user-card{display:flex;gap:10px;align-items:center;padding:8px 0}
.muted{color:var(--tf-muted);font-size:13px}
.empty{color:var(--tf-muted);text-align:center;padding:50px 20px}
.simple-page{flex:1;overflow:auto;background:#f7f8fa;padding:20px}
.simple-page h2{font-size:26px;margin:7px 0 18px}
.simple-card{background:#fff;border-radius:13px;padding:17px;margin:10px 0;border:1px solid #edf0f2}
.simple-card button{border:0;background:transparent;color:var(--tf-blue);padding:0}

@media(max-width:760px){
  .layout{grid-template-columns:minmax(0,1fr)}
  .sidebar{display:flex;border-right:0;width:100%;height:100%;padding-top:var(--safe-top)}
  .main{display:none}
  .layout.mobile-chat-open .sidebar{display:none}
  .layout.mobile-chat-open .main{display:flex;height:100%;padding-top:var(--safe-top)}
  .list-header{height:57px;min-height:57px;padding:0 17px}
  .search-wrap{padding:5px 17px 11px}
  .chat{min-height:91px;padding:10px 17px;gap:13px}
  .avatar{width:64px;height:64px}
  .bottom-tabs{height:67px;min-height:67px}
  .header{height:58px;min-height:58px;padding:0 13px}
  .back-chat{display:flex}
  .messages{padding:18px 12px}
  .composer{padding-bottom:calc(7px + var(--safe-bottom))}
}
@media(min-width:761px){
  .bottom-tabs{padding-bottom:5px}
}
@media(max-width:360px){
  .chat{padding-left:12px;padding-right:12px;gap:10px}
  .avatar{width:57px;height:57px}
  .chat-topline b{font-size:15.5px}
  .chat-preview{font-size:13.5px}
}
.read-ticks.is-sent{color:#9ca6ac;letter-spacing:0;padding-right:3px}
.read-ticks.is-read{color:#45a5d6}
.chat-preview .preview-sender{color:#353c41;font-weight:550}