:root {
  --bg: #f8fafc; --panel: #ffffff; --side: #f1f5f9; --text: #0f172a; --muted: #64748b;
  --border: #e2e8f0; --accent: #2563eb; --accent-text: #ffffff; --user: #2563eb; --user-text: #fff;
  --bot: #ffffff; --code: #f1f5f9; --danger: #dc2626; --warn-bg: #fef3c7; --warn: #92400e;
  --ok: #16a34a;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1120; --panel: #111827; --side: #0f172a; --text: #e5e7eb; --muted: #94a3b8;
    --border: #1f2937; --accent: #3b82f6; --user: #1d4ed8; --bot: #111827; --code: #1e293b;
    --warn-bg: #422006; --warn: #fcd34d;
  }
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { background: var(--bg); color: var(--text);
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", sans-serif; }
[hidden] { display: none !important; }
button { font: inherit; cursor: pointer; }
.muted { color: var(--muted); }
.error { color: var(--danger); min-height: 1.2em; }

/* login */
.login { min-height: 100%; display: grid; place-items: center; padding: 16px; }
.login-card { width: 100%; max-width: 340px; background: var(--panel); border: 1px solid var(--border);
  border-radius: 16px; padding: 28px; display: grid; gap: 12px; text-align: center; }
.login-card h1 { margin: 0; }
.login-card p { margin: 0; }
.login-card input { padding: 12px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--bg); color: var(--text); font: inherit; }
.login-card button { padding: 12px; border: 0; border-radius: 10px; background: var(--accent); color: var(--accent-text); }
.logo { width: 48px; height: 48px; margin: 0 auto; border-radius: 14px; display: grid; place-items: center;
  background: linear-gradient(135deg, #2563eb, #7c3aed); color: #fff; font-weight: 700; font-size: 22px; }
.logo.big { width: 64px; height: 64px; font-size: 30px; }

/* layout */
.app { display: flex; height: 100dvh; }
.sidebar { width: 280px; background: var(--side); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; padding: 12px; gap: 8px; overflow-y: auto; }
.new-chat { padding: 10px; border-radius: 10px; border: 1px solid var(--border); background: var(--panel); color: var(--text); }
.conv-list { flex: 1; min-height: 120px; overflow-y: auto; display: flex; flex-direction: column; gap: 2px; }
.conv { display: flex; align-items: center; gap: 4px; padding: 8px 10px; border-radius: 8px; color: var(--text);
  cursor: pointer; }
.conv:hover, .conv.active { background: var(--panel); }
.conv .name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.conv .act { visibility: hidden; border: 0; background: none; color: var(--muted); padding: 2px 4px; }
.conv:hover .act, .conv.active .act { visibility: visible; }
.link { border: 0; background: none; color: var(--muted); padding: 8px; text-align: left; }
.backdrop { display: none; }

.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar { display: flex; align-items: center; gap: 10px; padding: 10px 16px; border-bottom: 1px solid var(--border);
  background: var(--panel); }
.topbar h2 { flex: 1; margin: 0; font-size: 16px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.icon-btn { display: none; border: 0; background: none; color: var(--text); font-size: 20px; }
.pill { font-size: 12px; padding: 3px 10px; border-radius: 999px; border: 1px solid var(--border); color: var(--muted); white-space: nowrap; }
.pill.ok { color: var(--ok); border-color: currentColor; }
.pill.busy { color: var(--accent); border-color: currentColor; }
.pill.bad { color: var(--danger); border-color: currentColor; }
.banner { background: var(--warn-bg); color: var(--warn); padding: 8px 16px; font-size: 14px; }

/* messages */
.messages { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.empty { margin: auto; text-align: center; color: var(--muted); }
.msg { max-width: min(760px, 100%); padding: 10px 14px; border-radius: 14px; overflow-wrap: anywhere; }
.msg.user { align-self: flex-end; background: var(--user); color: var(--user-text); white-space: pre-wrap; border-bottom-right-radius: 4px; }
.msg.assistant { align-self: flex-start; background: var(--bot); border: 1px solid var(--border); border-bottom-left-radius: 4px; }
.msg.error { align-self: flex-start; color: var(--danger); border: 1px solid var(--danger); background: transparent; }
.msg.assistant p { margin: 0 0 8px; } .msg.assistant p:last-child { margin-bottom: 0; }
.msg pre { background: var(--code); padding: 10px; border-radius: 8px; overflow-x: auto; }
.msg code { background: var(--code); padding: 1px 4px; border-radius: 4px; font-size: 13px; }
.msg pre code { padding: 0; background: none; }
.msg table { border-collapse: collapse; display: block; overflow-x: auto; }
.msg th, .msg td { border: 1px solid var(--border); padding: 4px 8px; }
.meta { font-size: 11px; color: var(--muted); margin-top: 4px; }
.tool { align-self: flex-start; max-width: min(760px, 100%); font-size: 13px; color: var(--muted);
  border: 1px dashed var(--border); border-radius: 10px; padding: 6px 10px; }
.tool summary { cursor: pointer; }
.tool pre { white-space: pre-wrap; font-size: 12px; max-height: 240px; overflow: auto; background: var(--code); padding: 8px; border-radius: 6px; }
.typing::after { content: "▍"; animation: blink 1s infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* composer */
.composer { display: flex; gap: 8px; padding: 12px 16px calc(12px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--border); background: var(--panel); }
.composer textarea { flex: 1; resize: none; max-height: 200px; padding: 10px 12px; border-radius: 12px;
  border: 1px solid var(--border); background: var(--bg); color: var(--text); font: inherit; }
.composer button { width: 44px; border: 0; border-radius: 12px; background: var(--accent); color: var(--accent-text); font-size: 18px; }
.composer button:disabled { opacity: .5; cursor: not-allowed; }
.composer .stop { background: var(--danger); }

/* đội ngũ */
.section-title { margin: 6px 4px 2px; font-size: 12px; font-weight: 600; text-transform: uppercase;
  letter-spacing: .04em; color: var(--muted); }
.team-list { display: flex; flex-direction: column; gap: 6px; }
.agent { display: grid; grid-template-columns: 36px 1fr; gap: 2px 10px; align-items: center;
  padding: 8px; border-radius: 10px; background: var(--panel); border: 1px solid var(--border);
  border-left: 3px solid var(--agent-color, var(--border)); }
.agent .avatar { grid-row: span 4; width: 36px; height: 36px; border-radius: 10px; display: grid; place-items: center;
  font-size: 18px; background: color-mix(in srgb, var(--agent-color) 18%, transparent); }
.agent .head { display: flex; align-items: baseline; gap: 6px; min-width: 0; }
.agent .name { font-weight: 600; }
.agent .role { font-size: 12px; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.agent .mission { font-size: 12px; color: var(--muted); line-height: 1.35;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.agent .state { font-size: 12px; display: flex; align-items: center; gap: 6px; color: var(--muted); min-width: 0; }
.agent .state span:last-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: #94a3b8; flex: none; }
.agent.active .dot { background: var(--ok); box-shadow: 0 0 0 3px color-mix(in srgb, var(--ok) 25%, transparent);
  animation: pulse 1.4s infinite; }
.agent.active .state { color: var(--ok); }
@keyframes pulse { 50% { box-shadow: 0 0 0 6px transparent; } }
.agent .rank { margin-left: auto; font-size: 10px; padding: 1px 6px; border-radius: 999px; white-space: nowrap;
  color: var(--agent-color); background: color-mix(in srgb, var(--agent-color) 12%, transparent); }

/* cấp bậc: trưởng nhóm ở trên, thành viên nối cây bên dưới */
.agent.leader { grid-template-columns: 44px 1fr; padding: 10px; border: 1px solid var(--agent-color);
  border-left-width: 4px; background: linear-gradient(135deg,
  color-mix(in srgb, var(--agent-color) 10%, var(--panel)), var(--panel)); }
.agent.leader .avatar { width: 44px; height: 44px; font-size: 22px; }
.agent.leader .name { font-size: 16px; }
.reports { font-size: 11px; color: var(--muted); margin: 2px 0 0 20px; padding-left: 12px;
  border-left: 2px solid var(--border); padding-top: 4px; }
.members { display: flex; flex-direction: column; gap: 6px; margin-left: 20px; padding-left: 12px;
  border-left: 2px solid var(--border); position: relative; }
.members .agent { position: relative; }
.members .agent::before { content: ""; position: absolute; left: -14px; top: 50%; width: 12px;
  border-top: 2px solid var(--border); }
.members .agent:last-child::after { content: ""; position: absolute; left: -15px; top: calc(50% + 1px);
  bottom: -8px; width: 4px; background: var(--side); }

.tool.delegate { border-style: solid; border-color: var(--agent-color, var(--border)); color: var(--text); }
.tool .by { font-size: 11px; color: var(--muted); }

/* bộ kỹ năng */
.agent .skills-link { grid-column: 2; justify-self: start; border: 0; background: none; padding: 0;
  font-size: 11px; color: var(--accent); }
.skills-view { flex: 1; overflow-y: auto; padding: 16px; }
.skills-head { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-bottom: 10px; }
.skills-head input { flex: 1; min-width: 180px; padding: 8px 12px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--bg); color: var(--text); font: inherit; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { border: 1px solid var(--border); background: var(--panel); color: var(--text); border-radius: 999px;
  padding: 4px 10px; font-size: 13px; }
.chip.on { background: var(--agent-color, var(--accent)); border-color: var(--agent-color, var(--accent)); color: #fff; }
.skill-group { margin: 18px 0 8px; font-size: 13px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.skill-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 10px; }
.skill { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 12px; display: flex; flex-direction: column; gap: 6px; }
.skill code { font-size: 13px; font-weight: 600; background: none; padding: 0; }
.skill p { margin: 0; font-size: 14px; }
.skill .who { display: flex; flex-wrap: wrap; gap: 4px; margin-top: auto; }
.skill .who span { font-size: 11px; padding: 1px 8px; border-radius: 999px;
  background: color-mix(in srgb, var(--agent-color) 15%, transparent); color: var(--text); }
.skill .needs { font-size: 11px; color: var(--warn); background: var(--warn-bg); padding: 1px 8px; border-radius: 999px; align-self: flex-start; }
.skill.missing { opacity: .55; }

/* mobile */
@media (max-width: 760px) {
  .sidebar { position: fixed; inset: 0 auto 0 0; z-index: 20; transform: translateX(-100%); transition: transform .2s; }
  .sidebar.open { transform: none; }
  .backdrop.show { display: block; position: fixed; inset: 0; z-index: 10; background: rgba(0,0,0,.4); }
  .icon-btn { display: block; }
  .conv .act { visibility: visible; }
}