:root{
  --bg:#0a0d0c;
  --card:#111714;
  --card-2:#141a17;
  --line:rgba(255,255,255,.07);
  --line-strong:rgba(255,255,255,.12);
  --text:#eef4f1;
  --muted:#97a8a1;
  --muted-2:#65726c;
  --accent:#2dd4bf;
  --accent-2:#14b8a6;
  --accent-soft:rgba(45,212,191,.14);
  --danger:#f4685f;
}
*{box-sizing:border-box;margin:0;padding:0}
body{
  font-family:'Manrope',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.5;height:100vh;overflow:hidden;
}
.hidden{display:none !important}
button{font-family:inherit;cursor:pointer;border:none;border-radius:10px;transition:.15s}
.btn{padding:11px 18px;font-weight:700;font-size:14px}
.btn-primary{background:var(--accent);color:#04211d}
.btn-primary:hover{background:var(--accent-2)}
.btn-ghost{background:rgba(255,255,255,.05);color:var(--text);border:1px solid var(--line-strong)}
.btn-ghost:hover{background:rgba(255,255,255,.09)}
.btn-sm{padding:8px 14px;font-size:13px}

/* Auth */
.auth{min-height:100dvh;display:flex;align-items:center;justify-content:center;padding:24px}
.auth-card{width:100%;max-width:360px;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:32px;text-align:center}
.auth-title{font-size:20px;font-weight:800;margin-bottom:6px}
.auth-sub{color:var(--muted);font-size:14px;margin-bottom:18px}
.auth-card input{width:100%;background:#111;border:1.5px solid var(--line-strong);border-radius:10px;padding:12px 14px;color:#fff;font-size:14px;margin-bottom:12px;outline:none}
.auth-card input:focus{border-color:var(--accent)}
.auth-card .btn{width:100%}
.auth-error{color:var(--danger);font-size:13px;margin-top:10px}

/* App shell */
.app{display:grid;grid-template-columns:320px 1fr;height:100vh}
.sidebar{border-right:1px solid var(--line);display:flex;flex-direction:column;background:var(--card)}
.sidebar-head{padding:18px 16px 12px}
.sidebar-head .logo{display:block;font-weight:800;font-size:16px}
.sidebar-head .sub{color:var(--muted);font-size:12px}
.tabs{display:flex;gap:6px;padding:0 12px 12px;border-bottom:1px solid var(--line)}
.tab{flex:1;background:none;color:var(--muted);padding:9px;font-weight:700;font-size:13px;border-radius:8px}
.tab.active{background:var(--accent-soft);color:var(--accent)}
.ticket-list{flex:1;overflow-y:auto;padding:8px}
.empty{color:var(--muted);font-size:13px;text-align:center;padding:24px 12px}

.ticket-item{padding:12px;border-radius:12px;cursor:pointer;margin-bottom:4px;border:1px solid transparent}
.ticket-item:hover{background:rgba(255,255,255,.04)}
.ticket-item.active{background:var(--accent-soft);border-color:rgba(45,212,191,.25)}
.ticket-item .ti-name{font-weight:700;font-size:14px;display:flex;justify-content:space-between;gap:8px}
.ticket-item .ti-time{color:var(--muted-2);font-size:11px;font-weight:500;flex:none}
.ticket-item .ti-preview{color:var(--muted);font-size:12.5px;margin-top:3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ticket-item .ti-cat{color:var(--accent);font-size:11px;margin-top:4px;font-weight:600}

/* Conversation */
.conversation{display:flex;flex-direction:column;min-width:0}
.empty-state{flex:1;display:flex;align-items:center;justify-content:center;color:var(--muted)}
.conv-inner{display:flex;flex-direction:column;height:100%}
.conv-head{display:flex;align-items:center;justify-content:space-between;padding:16px 22px;border-bottom:1px solid var(--line)}
.conv-name{font-weight:800;font-size:16px}
.conv-meta{color:var(--muted);font-size:12.5px;margin-top:2px}

.messages{flex:1;overflow-y:auto;padding:20px 22px;display:flex;flex-direction:column;gap:10px}
.msg{max-width:65%;padding:10px 14px;border-radius:14px;font-size:14px;line-height:1.45;white-space:pre-wrap;word-break:break-word}
.msg.user{align-self:flex-start;background:var(--card-2);border:1px solid var(--line)}
.msg.operator{align-self:flex-end;background:var(--accent);color:#04211d;font-weight:500}
.msg-meta{font-size:10.5px;color:var(--muted-2);margin-top:4px}
.msg.operator .msg-meta{color:rgba(4,33,29,.6)}

.reply-form{display:flex;gap:10px;padding:16px 22px;border-top:1px solid var(--line);align-items:flex-end}
.reply-form textarea{flex:1;background:var(--card-2);border:1.5px solid var(--line-strong);border-radius:12px;padding:11px 14px;color:#fff;font-family:inherit;font-size:14px;resize:none;outline:none}
.reply-form textarea:focus{border-color:var(--accent)}
.btn-attach{background:rgba(255,255,255,.05);border:1px solid var(--line-strong);color:var(--muted);width:44px;height:44px;border-radius:12px;font-size:18px;flex:none}
.btn-attach:hover{background:rgba(255,255,255,.09);color:var(--text)}
.btn-attach.active{background:var(--accent-soft);color:var(--accent);border-color:rgba(45,212,191,.35)}
.attach-preview{display:flex;align-items:center;gap:10px;padding:8px 22px;background:var(--card-2);border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
.attach-preview button{background:none;color:var(--muted);padding:2px 6px;font-size:13px}
.attach-preview button:hover{color:var(--danger)}

/* Media messages */
.msg img{max-width:100%;border-radius:10px;display:block}
.msg .file-link{display:flex;align-items:center;gap:8px;color:inherit;text-decoration:underline}
.msg .file-caption{margin-top:6px}

.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--card-2);border:1px solid var(--line-strong);color:var(--text);padding:12px 20px;border-radius:999px;font-weight:600;font-size:13px;opacity:0;pointer-events:none;transition:.25s}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

@media(max-width:760px){
  .app{grid-template-columns:1fr}
  .conversation.has-selection{display:flex}
  .sidebar.has-selection{display:none}
}