:root {
  --bg: #0d0d0f;
  --sidebar: #151517;
  --main: #0d0d0f;
  --panel: #1a1a1d;
  --elevated: #222225;
  --fg: #ececf1;
  --fg-dim: #9a9aa5;
  --fg-dimmer: #6a6a75;
  --accent: #7c5cff;
  --accent-soft: rgba(124, 92, 255, 0.14);
  --user-bubble: #2a2a2e;
  --border: #262629;
  --border-soft: #1e1e21;
  --ok: #3ecf8e;
  --warn: #f5a623;
  --danger: #ff5a6a;
  --radius: 14px;
  --mono: ui-monospace, 'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;
  --sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; overflow: hidden; }
body { background: var(--bg); color: var(--fg); font-family: var(--sans); font-size: 15px; line-height: 1.6; -webkit-font-smoothing: antialiased; }

#app { display: grid; grid-template-columns: 264px 1fr; height: 100vh; transition: grid-template-columns 0.2s ease; }
#app.sidebar-collapsed { grid-template-columns: 0 1fr; }

/* ░░ sidebar ░░ */
#chat-sidebar { background: var(--sidebar); border-right: 1px solid var(--border-soft); display: flex; flex-direction: column; overflow: hidden; }
.sidebar-head { padding: 12px; }
#new-chat {
  width: 100%; display: flex; align-items: center; gap: 8px; justify-content: flex-start;
  background: transparent; border: 1px solid var(--border); color: var(--fg);
  padding: 11px 12px; border-radius: 10px; font-size: 14px; font-weight: 500; cursor: pointer; transition: background 0.12s;
}
#new-chat:hover { background: var(--elevated); }
#conversation-list { flex: 1; overflow-y: auto; padding: 4px 8px; display: flex; flex-direction: column; gap: 2px; }
.conv {
  display: flex; align-items: center; gap: 8px; padding: 9px 11px; border-radius: 9px;
  cursor: pointer; color: var(--fg-dim); font-size: 13.5px; transition: background 0.1s;
  white-space: nowrap; overflow: hidden;
}
.conv:hover { background: var(--elevated); color: var(--fg); }
.conv.active { background: var(--elevated); color: var(--fg); }
.conv-title { flex: 1; overflow: hidden; text-overflow: ellipsis; }
.conv-del { opacity: 0; color: var(--fg-dimmer); font-size: 15px; line-height: 1; padding: 2px 4px; border-radius: 5px; }
.conv:hover .conv-del { opacity: 1; }
.conv-del:hover { color: var(--danger); background: rgba(255,90,106,0.1); }
.sidebar-foot { padding: 12px 16px; border-top: 1px solid var(--border-soft); display: flex; align-items: center; justify-content: space-between; }
.brand { font-weight: 800; letter-spacing: 0.14em; font-size: 15px; background: linear-gradient(120deg, var(--accent), #b89bff); -webkit-background-clip: text; background-clip: text; color: transparent; }
.status { font-size: 10px; text-transform: uppercase; letter-spacing: 0.08em; padding: 3px 7px; border-radius: 999px; font-weight: 600; }
.status.online { background: rgba(62,207,142,0.14); color: var(--ok); }
.status.offline { background: rgba(255,90,106,0.14); color: var(--danger); }

/* ░░ main ░░ */
#main { display: flex; flex-direction: column; min-width: 0; height: 100vh; }
#topbar { display: flex; align-items: center; justify-content: space-between; padding: 10px 16px; border-bottom: 1px solid var(--border-soft); gap: 12px; }
.topbar-left, .topbar-right { display: flex; align-items: center; gap: 8px; }
#chat-title { font-size: 14px; color: var(--fg-dim); font-weight: 500; max-width: 50vw; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.icon-btn { background: transparent; border: none; color: var(--fg-dim); cursor: pointer; padding: 7px; border-radius: 8px; display: flex; transition: background 0.1s, color 0.1s; }
.icon-btn:hover { background: var(--elevated); color: var(--fg); }
.pill-select, .pill-btn {
  background: var(--panel); border: 1px solid var(--border); color: var(--fg); border-radius: 999px;
  padding: 7px 13px; font-size: 13px; font-family: var(--sans); cursor: pointer; display: flex; align-items: center; gap: 6px;
}
.pill-select:hover, .pill-btn:hover { background: var(--elevated); }

/* ░░ messages ░░ */
#messages { flex: 1; overflow-y: auto; padding: 28px 0 10px; scroll-behavior: smooth; }
.msg { max-width: 760px; margin: 0 auto 22px; padding: 0 28px; }
.msg-role { font-size: 11px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--fg-dimmer); font-weight: 700; margin-bottom: 7px; }
.msg-user .msg-wrap { display: flex; justify-content: flex-end; }
.msg-user .msg-content { background: var(--user-bubble); padding: 11px 16px; border-radius: 18px 18px 4px 18px; max-width: 80%; }
.msg-assistant .msg-role { color: var(--accent); }
.msg-content { white-space: pre-wrap; word-wrap: break-word; }
.msg-thinking { max-width: 760px; margin: 0 auto 14px; padding: 0 28px; }
.msg-thinking .msg-content { color: var(--fg-dimmer); font-size: 13px; font-style: italic; padding-left: 12px; border-left: 2px solid var(--border); }
.msg-thinking .msg-role { color: var(--fg-dimmer); }
.msg-tool { max-width: 760px; margin: 0 auto 14px; padding: 0 28px; }
.msg-tool .msg-content {
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 10px 14px;
  font-family: var(--mono); font-size: 12px; color: var(--fg-dim); overflow-x: auto; max-height: 360px; overflow-y: auto;
}
.msg-tool .msg-role { color: var(--warn); }
.msg-content pre { background: #08080a; border: 1px solid var(--border); border-radius: 10px; padding: 13px 15px; overflow-x: auto; margin: 10px 0; font-size: 13px; font-family: var(--mono); }
.msg-content code { font-family: var(--mono); font-size: 13px; color: #c3b5ff; background: var(--accent-soft); padding: 1px 5px; border-radius: 4px; }
.msg-content pre code { color: var(--fg); background: none; padding: 0; }
.msg-content a { color: #a28bff; text-decoration: underline; text-underline-offset: 2px; }
.msg-content table { border-collapse: collapse; margin: 10px 0; font-size: 13px; }
.msg-content th, .msg-content td { border: 1px solid var(--border); padding: 6px 10px; text-align: left; }
.msg-content th { background: var(--panel); }
.msg-content h2 { font-size: 17px; margin: 14px 0 6px; }
.msg-content strong { color: var(--fg); font-weight: 650; }

.empty-state { max-width: 560px; margin: 14vh auto 0; text-align: center; color: var(--fg-dim); padding: 0 28px; }
.empty-state .big { font-size: 34px; font-weight: 800; letter-spacing: 0.1em; background: linear-gradient(120deg, var(--accent), #b89bff); -webkit-background-clip: text; background-clip: text; color: transparent; margin-bottom: 10px; }
.empty-state .chips { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 22px; }
.chip { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 10px 14px; font-size: 13px; cursor: pointer; color: var(--fg); text-align: left; transition: background 0.1s; }
.chip:hover { background: var(--elevated); }

/* ░░ composer ░░ */
#composer-wrap { padding: 8px 28px 16px; }
#composer { max-width: 760px; margin: 0 auto; background: var(--panel); border: 1px solid var(--border); border-radius: 22px; display: flex; align-items: flex-end; padding: 8px 8px 8px 18px; gap: 8px; transition: border-color 0.12s; }
#composer:focus-within { border-color: var(--accent); }
#input { flex: 1; background: transparent; border: none; color: var(--fg); font-family: var(--sans); font-size: 15px; resize: none; max-height: 200px; padding: 8px 0; line-height: 1.5; }
#input:focus { outline: none; }
#send { background: var(--accent); color: #fff; border: none; width: 38px; height: 38px; border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; flex-shrink: 0; transition: filter 0.1s, opacity 0.1s; }
#send:hover { filter: brightness(1.12); }
#send:disabled { opacity: 0.4; cursor: default; }
.agent-status { max-width: 760px; margin: 8px auto 0; font-family: var(--mono); font-size: 12px; color: var(--accent); min-height: 16px; }
.agent-status.working::before { content: ''; display: inline-block; width: 7px; height: 7px; margin-right: 7px; border-radius: 50%; background: var(--accent); animation: pulse 1s ease-in-out infinite; vertical-align: middle; }
.agent-status.warn { color: var(--warn); }
.composer-hint { max-width: 760px; margin: 6px auto 0; text-align: center; font-size: 11px; color: var(--fg-dimmer); }
@keyframes pulse { 0%,100% { opacity: 0.25; } 50% { opacity: 1; } }

/* ░░ tools slide-over ░░ */
.overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 40; }
.overlay.hidden { display: none; }
#tools-panel { position: fixed; top: 0; right: 0; width: 400px; max-width: 92vw; height: 100vh; background: var(--sidebar); border-left: 1px solid var(--border); z-index: 50; display: flex; flex-direction: column; transform: translateX(0); transition: transform 0.22s ease; box-shadow: -20px 0 50px rgba(0,0,0,0.4); }
#tools-panel.hidden { transform: translateX(105%); }
.panel-head { padding: 18px 20px 10px; border-bottom: 1px solid var(--border-soft); position: relative; }
.panel-head h2 { font-size: 16px; }
.panel-sub { font-size: 12px; color: var(--fg-dimmer); }
#tools-close { position: absolute; top: 16px; right: 16px; font-size: 14px; }
.panel-row { padding: 12px 20px; }
#tool-filter { width: 100%; background: var(--panel); border: 1px solid var(--border); color: var(--fg); border-radius: 9px; padding: 9px 12px; font-size: 13px; font-family: var(--sans); }
#tool-filter:focus { outline: none; border-color: var(--accent); }
#tool-groups { flex: 1; overflow-y: auto; padding: 0 14px 20px; }
.group { margin-bottom: 18px; }
.group-title { font-size: 11px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--fg-dimmer); margin: 6px 6px 8px; }
.tool { padding: 9px 10px; border-radius: 9px; transition: background 0.1s; }
.tool:hover { background: var(--elevated); }
.tool-name { font-family: var(--mono); font-size: 12.5px; color: var(--fg); font-weight: 500; }
.tool-desc { font-size: 12px; color: var(--fg-dim); margin-top: 2px; }
.tool.active { background: var(--accent-soft); }
.tool.active .tool-name { color: #b89bff; }

/* ░░ settings menu ░░ */
.menu { position: fixed; top: 54px; right: 120px; background: var(--elevated); border: 1px solid var(--border); border-radius: 12px; padding: 8px; z-index: 60; min-width: 220px; box-shadow: 0 16px 40px rgba(0,0,0,0.5); }
.menu.hidden { display: none; }
.menu-row { display: flex; align-items: center; justify-content: space-between; padding: 9px 11px; font-size: 13.5px; color: var(--fg); border-radius: 8px; }
.menu-row:hover { background: var(--panel); }
.menu-sep { height: 1px; background: var(--border); margin: 6px 4px; }
.tor-dot { font-family: var(--mono); font-size: 11px; padding: 2px 8px; border-radius: 999px; font-weight: 700; }
.tor-dot.unknown { background: var(--panel); color: var(--fg-dimmer); }
.tor-dot.up { background: rgba(62,207,142,0.16); color: var(--ok); }
.tor-dot.down { background: rgba(255,90,106,0.16); color: var(--danger); }
input[type="checkbox"] { accent-color: var(--accent); width: 16px; height: 16px; }

/* ░░ scrollbar ░░ */
::-webkit-scrollbar { width: 9px; height: 9px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #303034; border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: #3f3f45; }

@media (max-width: 720px) {
  #app { grid-template-columns: 0 1fr; }
  .msg, .msg-tool, .msg-thinking, #composer, .agent-status, .composer-hint { padding-left: 16px; padding-right: 16px; }
}

/* ─── thinking indicator (patched) ─── */
.msg.is-thinking .msg-content {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--fg-dim);
  font-style: italic;
}
.msg.is-thinking .msg-content::before { content: 'VOID is thinking'; }
.msg.is-thinking .msg-content::after {
  content: '';
  width: 10px; height: 10px;
  border: 2px solid var(--accent);
  border-top-color: transparent;
  border-radius: 50%;
  animation: void-spin 0.9s linear infinite;
  display: inline-block;
}
.agent-status.working::before {
  content: '';
  display: inline-block;
  width: 8px; height: 8px;
  margin-right: 8px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: void-spin 0.9s linear infinite;
  vertical-align: middle;
}
.msg-content .hint { color: var(--fg-dimmer); font-size: 0.9em; }
@keyframes void-spin { to { transform: rotate(360deg); } }