:root{--accent:#0d9488;--accent-soft:#ccfbf1;--bg:#f1f5f9;--panel:#ffffff;--border:#e2e8f0;--text:#0f172a;--muted:#64748b;--me:#0d9488;--them:#e2e8f0;--radius:14px;--shadow:0 1px 3px rgba(15,23,42,0.08),0 8px 24px rgba(15,23,42,0.04)}*{box-sizing:border-box}body,html{height:100%;margin:0}body{font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}button,input,textarea{font:inherit}.topbar{height:56px;display:flex;align-items:center;gap:10px;padding:0 20px;background:var(--panel);border-bottom:1px solid var(--border)}.topbar .dot{width:28px;height:28px;border-radius:8px;background:var(--accent);color:#fff;display:grid;place-items:center}.topbar .dot,.topbar .title{font-weight:700}.topbar .sub{color:var(--muted);font-size:13px;margin-left:auto}.app{display:grid;grid-template-columns:320px 1fr;height:calc(100vh - 56px)}.sidebar{background:var(--panel);border-right:1px solid var(--border);display:flex;flex-direction:column;min-height:0}.sidebar-header{padding:14px 16px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border)}.sidebar-header h2{margin:0;font-size:15px}.ticket-list{overflow-y:auto;flex:1 1;padding:8px}.ticket-item{width:100%;text-align:left;cursor:pointer;border:1px solid transparent;background:transparent;border-radius:10px;padding:10px 12px;margin-bottom:4px;display:flex;flex-direction:column;gap:4px}.ticket-item:hover{background:var(--bg)}.ticket-item.active{background:var(--accent-soft);border-color:var(--accent)}.ticket-item .t-title{font-weight:600;font-size:14px}.ticket-item .t-meta{font-size:12px;color:var(--muted);display:flex;gap:6px;align-items:center}.badge{font-size:11px;font-weight:600;padding:2px 8px;border-radius:999px;background:var(--border);color:var(--muted);text-transform:capitalize}.badge.open{background:#dbeafe;color:#1d4ed8}.badge.in_progress{background:#fef3c7;color:#b45309}.badge.answered{background:#dcfce7;color:#15803d}.badge.closed{background:#e2e8f0;color:#475569}.main{display:flex;flex-direction:column;min-height:0}.main-header{padding:14px 20px;border-bottom:1px solid var(--border);background:var(--panel);display:flex;align-items:center;gap:10px}.main-header h3{margin:0;font-size:16px}.thread{flex:1 1;overflow-y:auto;padding:24px;display:flex;flex-direction:column;gap:12px}.bubble{max-width:70%;padding:10px 14px;border-radius:var(--radius);font-size:14px;line-height:1.45;box-shadow:var(--shadow);white-space:pre-wrap}.bubble .author{font-size:11px;font-weight:700;opacity:.7;margin-bottom:3px}.bubble .time{font-size:10px;opacity:.55;margin-top:4px}.bubble.them{align-self:flex-start;background:var(--panel)}.bubble.me{align-self:flex-end;background:var(--me);color:#fff}.bubble.system{align-self:center;background:transparent;box-shadow:none;color:var(--muted);font-size:12px;font-style:italic}.composer{border-top:1px solid var(--border);background:var(--panel);padding:14px 20px;display:flex;gap:10px;align-items:flex-end}.input,.textarea{width:100%;border:1px solid var(--border);border-radius:10px;padding:10px 12px;outline:none;resize:none}.input:focus,.textarea:focus{border-color:var(--accent)}.btn{background:var(--accent);color:#fff;border:none;cursor:pointer;border-radius:10px;padding:10px 18px;font-weight:600;white-space:nowrap}.btn:hover{filter:brightness(.95)}.btn.secondary{background:var(--panel);color:var(--text);border:1px solid var(--border)}.btn:disabled{opacity:.5;cursor:not-allowed}.empty{flex:1 1;display:grid;place-items:center;color:var(--muted);text-align:center}.empty .big{font-size:40px;margin-bottom:8px}.newform{padding:24px;max-width:520px;margin:0 auto;width:100%}.newform h3{margin-top:0}.field{margin-bottom:14px}.field label{display:block;font-size:13px;font-weight:600;margin-bottom:6px}.row{display:flex;gap:10px}