:root{
  --orange:#ff6b1a;
  --orange-dark:#d94e00;
  --ink:#171717;
  --muted:#6f6f73;
  --line:#e8e8eb;
  --surface:#ffffff;
  --soft:#f7f7f8;
  --success:#147a48;
  --danger:#c83232;
  --shadow:0 24px 70px rgba(20,20,28,.14);
  font-family:Tahoma,Arial,sans-serif;
  color:var(--ink);
  background:#f4f4f5;
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;background:#f4f4f5}
body{min-height:100vh;overflow:hidden}
button,input,textarea{font:inherit}
button,a{touch-action:manipulation}
button{cursor:pointer}
a{color:inherit}
[hidden]{display:none!important}
.ambient{position:fixed;border-radius:999px;filter:blur(10px);opacity:.22;pointer-events:none}
.ambient-one{width:360px;height:360px;background:var(--orange);top:-180px;right:-80px}
.ambient-two{width:280px;height:280px;background:#ffc3a0;left:-120px;bottom:-100px}
.login-shell{min-height:100vh;display:grid;place-items:center;padding:28px;position:relative;z-index:1}
.login-card{width:min(470px,100%);background:rgba(255,255,255,.96);border:1px solid rgba(255,255,255,.9);border-radius:26px;padding:34px;box-shadow:var(--shadow);position:relative}
.brand-lockup,.topbar-brand{display:flex;align-items:center;gap:14px}
.brand-mark{width:52px;height:52px;border-radius:17px;background:linear-gradient(145deg,var(--orange),#ff8f51);display:grid;place-items:center;color:white;font-weight:800;font-size:24px;box-shadow:0 10px 30px rgba(255,107,26,.28)}
.brand-mark.small{width:38px;height:38px;border-radius:12px;font-size:18px}
.eyebrow{margin:0 0 5px;color:var(--orange-dark);font-weight:800;letter-spacing:.13em;font-size:11px}
h1,h2,p{margin-top:0}
h1{font-size:31px;margin-bottom:0;letter-spacing:-.03em}
.login-copy{margin:24px 0;color:var(--muted);line-height:1.6}
.login-form{display:grid;gap:15px}
label{display:grid;gap:7px;font-size:13px;font-weight:700}
input,textarea{width:100%;border:1px solid #d9d9dd;border-radius:13px;background:#fff;color:var(--ink);padding:12px 13px;outline:none;transition:border-color .2s,box-shadow .2s}
input:focus,textarea:focus{border-color:var(--orange);box-shadow:0 0 0 4px rgba(255,107,26,.12)}
textarea{resize:none;line-height:1.45}
.primary-button,.secondary-button,.icon-button{border:0;border-radius:12px;font-weight:800}
.primary-button{background:var(--orange);color:#fff;padding:13px 18px;box-shadow:0 8px 22px rgba(255,107,26,.22)}
.primary-button:hover{background:var(--orange-dark)}
.primary-button:disabled,.secondary-button:disabled{opacity:.55;cursor:not-allowed}
.primary-button.compact{padding:11px 22px}
.secondary-button{background:#f0f0f2;color:#333;padding:10px 14px}
.secondary-button:hover{background:#e5e5e8}
.form-status{margin:0;min-height:18px;color:var(--muted);font-size:12px;line-height:1.45}
.form-status.error{color:var(--danger)}
.form-status.success{color:var(--success)}
.login-links{display:flex;gap:18px;flex-wrap:wrap;margin-top:18px;font-size:13px;font-weight:700}
.login-links a{color:var(--orange-dark);text-decoration:none}
.security-note{border-top:1px solid var(--line);margin:22px 0 0;padding-top:18px;color:#777;font-size:11px;line-height:1.55}
.version-pill{display:inline-block;margin-top:14px;background:#fff1e8;color:var(--orange-dark);font-size:11px;font-weight:800;padding:6px 9px;border-radius:999px}
.messenger-shell{min-height:100vh;display:grid;grid-template-rows:66px 1fr;position:relative;z-index:1}
.topbar{height:66px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 20px;gap:20px}
.topbar-brand strong{display:block;font-size:15px}
.topbar-brand span{display:block;color:var(--success);font-size:11px;margin-top:2px}
.profile-menu{display:flex;align-items:center;gap:14px}
.profile-summary{text-align:right}
.profile-summary strong,.profile-summary span{display:block}
.profile-summary strong{font-size:13px}
.profile-summary span{font-size:11px;color:var(--muted);margin-top:2px}
.quiet-link{font-size:12px;color:var(--orange-dark);text-decoration:none;font-weight:700}
.workspace{min-height:0;display:grid;grid-template-columns:350px 1fr}
.sidebar{background:#fff;border-right:1px solid var(--line);min-height:0;display:flex;flex-direction:column;padding:20px 16px 14px}
.sidebar-head,.directory-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.sidebar-head h2{margin:0;font-size:22px}
.conversation-list{display:grid;gap:7px;margin:17px 0 18px;max-height:39vh;overflow:auto;padding-right:3px}
.conversation-item,.member-item{border:0;background:transparent;text-align:left;width:100%;border-radius:15px;padding:11px 12px;display:grid;grid-template-columns:auto 1fr auto;gap:11px;align-items:center}
.conversation-item:hover,.member-item:hover{background:var(--soft)}
.conversation-item.active{background:#fff0e7;box-shadow:inset 0 0 0 1px rgba(255,107,26,.15)}
.avatar{width:40px;height:40px;border-radius:14px;background:#ececef;display:grid;place-items:center;font-weight:800;color:#555;flex:none}
.avatar.group{background:linear-gradient(145deg,var(--orange),#ff9b62);color:white}
.item-copy{min-width:0}
.item-copy strong,.item-copy span,.item-copy small{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.item-copy strong{font-size:13px}
.item-copy span{font-size:11px;color:var(--muted);margin-top:3px}
.item-copy small{font-size:10px;color:#999;margin-top:3px}
.badge{min-width:22px;height:22px;border-radius:999px;padding:0 7px;background:var(--orange);color:#fff;font-size:11px;font-weight:800;display:grid;place-items:center}
.directory-head{border-top:1px solid var(--line);padding-top:17px;display:grid}
.directory-head>div{display:flex;justify-content:space-between;align-items:center}
.directory-head span{font-size:11px;color:var(--muted)}
.directory-head input{padding:10px 11px;font-size:12px}
.member-list{display:grid;gap:4px;overflow:auto;margin-top:10px;padding-right:3px}
.member-item{grid-template-columns:auto 1fr;padding:9px 10px}
.member-item.current{opacity:.6;cursor:default}
.chat-panel{min-width:0;min-height:0;background:#f7f7f8;display:grid;grid-template-rows:auto 1fr auto}
.chat-head{background:#fff;border-bottom:1px solid var(--line);padding:17px 24px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.chat-head h2{font-size:20px;margin:0}
.chat-head span{display:block;color:var(--muted);font-size:12px;margin-top:4px}
.message-list{overflow:auto;padding:26px max(24px,5vw);display:flex;flex-direction:column;gap:14px;scroll-behavior:smooth}
.empty-state{margin:auto;text-align:center;color:var(--muted);max-width:360px;line-height:1.6}
.empty-state strong{display:block;color:var(--ink);font-size:18px;margin-bottom:6px}
.message-row{display:flex;gap:10px;align-items:flex-end;max-width:min(760px,88%)}
.message-row.own{align-self:flex-end;flex-direction:row-reverse}
.message-row.other{align-self:flex-start}
.message-card{background:#fff;border:1px solid var(--line);border-radius:18px 18px 18px 5px;padding:11px 13px;box-shadow:0 6px 18px rgba(25,25,35,.05);min-width:140px}
.message-row.own .message-card{background:#fff0e7;border-color:#ffd6bd;border-radius:18px 18px 5px 18px}
.message-meta{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:6px}
.message-meta strong{font-size:11px}
.message-meta span{font-size:9px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.message-body{white-space:pre-wrap;overflow-wrap:anywhere;font-size:13px;line-height:1.52}
.message-body.deleted{font-style:italic;color:#999}
.message-footer{display:flex;justify-content:flex-end;align-items:center;gap:9px;margin-top:7px}
.message-footer time{font-size:9px;color:#999}
.message-delete{border:0;background:transparent;color:var(--danger);font-size:10px;font-weight:800;padding:0}
.attachment-link{display:inline-flex;margin-top:9px;padding:8px 10px;border-radius:10px;background:#f2f2f4;color:#333;text-decoration:none;font-size:11px;font-weight:700;max-width:100%;overflow:hidden;text-overflow:ellipsis}
.composer{background:#fff;border-top:1px solid var(--line);padding:14px 22px 18px;display:grid;gap:9px}
.composer textarea{min-height:52px;max-height:150px}
.attachment-fields{display:grid;grid-template-columns:1fr 2fr;gap:9px}
.composer-actions{display:flex;align-items:center;gap:10px}
.composer-actions .form-status{flex:1}
.icon-button{width:38px;height:38px;background:#f0f0f2;font-size:20px}
.mobile-only{display:none}
.toast{position:fixed;right:18px;bottom:18px;z-index:20;background:#222;color:#fff;border-radius:13px;padding:12px 16px;box-shadow:var(--shadow);font-size:12px;opacity:0;transform:translateY(12px);pointer-events:none;transition:.2s}
.toast.show{opacity:1;transform:none}
.toast.error{background:#a92222}
@media(max-width:850px){
  body{overflow:auto}
  .messenger-shell{height:100dvh;min-height:650px}
  .workspace{grid-template-columns:1fr}
  .sidebar{position:fixed;left:0;top:66px;bottom:0;width:min(350px,92vw);z-index:10;transform:translateX(-105%);transition:transform .22s;box-shadow:20px 0 50px rgba(0,0,0,.15)}
  .sidebar.open{transform:none}
  .mobile-only{display:grid}
  .quiet-link,.profile-summary{display:none}
  .topbar{padding:0 12px}
  .chat-head{padding:14px 16px}
  .message-list{padding:20px 14px}
  .message-row{max-width:94%}
  .composer{padding:12px}
  .attachment-fields{grid-template-columns:1fr}
}
@media(max-width:500px){
  .login-shell{padding:14px}
  .login-card{padding:26px 20px;border-radius:20px}
  h1{font-size:27px}
  .topbar-brand strong{font-size:13px}
  .secondary-button{padding:9px 11px;font-size:11px}
}