:root {
  --bg: #0e1116;
  --sidebar: #141a23;
  --card: #1a222e;
  --border: #2a3342;
  --text: #e6edf3;
  --muted: #8b96a5;
  --accent: #3b82f6;
  --accent-2: #8b5cf6;
  --user: #3b82f6;
  --assistant: #2a2f3a;
  --green: #22c55e;
  --red: #ef4444;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  overflow: hidden;
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

/* ---------- App frame ---------- */
.app {
  display: grid;
  grid-template-columns: 300px 1fr;
  height: 100vh;
  width: 100%;
}

/* ---------- Sidebar ---------- */
.sidebar {
  background: var(--sidebar);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  min-width: 260px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 16px 10px;
  border-bottom: 1px solid var(--border);
}
.brand-logo { font-size: 26px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong { color: var(--text); }
.brand-text strong::after { content: ""; }
.brand-text small { color: var(--muted); font-size: 12px; }

.side-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  color: var(--muted);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.btn-icon {
  width: 28px; height: 28px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  color: var(--accent);
  font-size: 18px;
  cursor: pointer;
}

.bot-list { flex: 1; overflow-y: auto; padding: 2px 8px; }
.bot-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 11px 12px;
  margin-bottom: 6px;
  border: none;
  border-radius: 10px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  text-align: left;
}
.bot-item:hover { background: var(--card); }
.bot-item.active { background: var(--card); border: 1px solid var(--accent); }
.bot-item .avatar { font-size: 20px; }
.bot-item .b-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 600; }
.bot-item .b-tools { color: var(--muted); font-size: 11px; margin-left: auto; }
.bot-empty { color: var(--muted); font-size: 13px; padding: 12px; }

.splitter { border-top: 1px solid var(--border); margin: 4px 0; }

.side-foot { padding: 12px 14px; border-top: 1px solid var(--border); }
.side-foot select { width: 100%; margin-bottom: 8px; }
.foot-row { display: flex; gap: 8px; align-items: center; }
.badge {
  padding: 3px 9px; border-radius: 999px; font-size: 11px;
  background: var(--card); border: 1px solid var(--border); color: var(--muted);
}
.badge.ok { color: var(--green); border-color: var(--green); }

/* ---------- Main chat ---------- */
.chat { display: flex; flex-direction: column; }

.empty {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  height: 100%; text-align: center; color: var(--muted);
}
.empty-icon { font-size: 64px; margin-bottom: 12px; }
.empty h2 { color: var(--text); margin: 0 0 8px; font-size: 22px; }
.empty p { margin: 0 0 20px; max-width: 480px; }

.chat-header {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  background: var(--sidebar);
}
.avatar {
  width: 44px; height: 44px; border-radius: 50%;
  background-color: var(--card);
  background-size: cover; background-position: center;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px; border: 1px solid var(--border);
  flex-shrink: 0;
}
.avatar-img { font-size: 0; background-size: cover; background-position: center; }
.avatar-preview { width: 52px; height: 52px; font-size: 26px; }
.avatar-row { display: flex; align-items: center; gap: 10px; margin-top: 6px; }
.chat-title { display: flex; flex-direction: column; flex: 1; }
.chat-title strong { font-size: 17px; }
.chat-title span { font-size: 12px; }
.chat-actions { display: flex; gap: 8px; }

.messages { flex: 1; overflow-y: auto; padding: 16px 20px; display: flex; flex-direction: column; gap: 12px; }
.msg {
  display: flex; gap: 10px; max-width: 82%;
  padding: 11px 14px; border-radius: 14px;
  line-height: 1.5; white-space: pre-wrap; word-break: break-word;
}
.msg.user { align-self: flex-end; background: var(--user); color: #fff; }
.msg.assistant { align-self: flex-start; background: var(--assistant); border: 1px solid var(--border); }
.msg.system { align-self: center; background: transparent; color: var(--muted); font-size: 12px; border: none; padding: 4px 10px; }
.msg .m-role { display: block; font-size: 11px; color: var(--muted); margin-bottom: 2px; }
.msg.user .m-role { color: rgba(255,255,255,.8); }

.typing {
  align-self: flex-start; color: var(--muted); font-size: 13px;
  padding: 6px 12px; border: 1px dashed var(--border); border-radius: 10px;
  animation: blink 1.1s infinite;
}
@keyframes blink { 50% { opacity: .35; } }

.chat-input {
  display: flex; align-items: flex-end; gap: 10px;
  padding: 14px 18px;
  border-top: 1px solid var(--border);
  background: var(--sidebar);
}
.chat-input textarea {
  flex: 1; resize: none; min-height: 44px; max-height: 140px;
  padding: 12px 14px; background: var(--bg);
  border: 1px solid var(--border); border-radius: 12px; color: var(--text);
  font-size: 15px; font-family: inherit;
}
.send {
  width: 44px; height: 44px; border: none; border-radius: 12px; cursor: pointer;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; font-size: 18px;
}

/* ---------- Shared controls ---------- */
button {
  border: none; border-radius: 8px; padding: 9px 14px; cursor: pointer;
  font-weight: 600; font-size: 14px; color: var(--text); background: var(--card);
}
button.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff;
}
button.ghost { background: transparent; border: 1px solid var(--border); }
button.danger { background: var(--red); color: #fff; }
button:disabled { opacity: .5; cursor: wait; }

label { display: block; color: var(--muted); font-size: 13px; margin-bottom: 6px; }
label:not(.keys-title) { margin-top: 8px; }
input, textarea, select {
  width: 100%; margin-top: 4px; padding: 9px 11px;
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
  color: var(--text); font-size: 14px;
}
select[multiple] { height: auto; }

.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.row { display: flex; gap: 10px; align-items: center; }
.row.right { justify-content: flex-end; margin-top: 14px; }
.muted { color: var(--muted); }

/* Friendly tools picker — chips with checkboxes */
.tools-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; margin-top: 4px; }
.tool-chip {
  display: flex; align-items: center; gap: 6px;
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg); cursor: pointer; font-size: 13px; user-select: none;
}
.tool-chip:hover { border-color: var(--accent); }
.tool-chip input { width: auto; margin: 0; accent-color: var(--accent); }
.tool-chip:has(input:checked) { border-color: var(--accent); background: var(--card); }
button.small { padding: 5px 10px; font-size: 12px; }

/* ---------- Modal ---------- */
.modal {
  position: fixed; inset: 0; background: rgba(0,0,0,.6);
  display: flex; align-items: center; justify-content: center; z-index: 50; padding: 16px;
}
.modal-box {
  width: 100%; max-width: 620px; max-height: 92vh; overflow-y: auto;
  background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 20px;
}
.modal-head { display: flex; align-items: center; justify-content: space-between; }
.modal-head h2 { margin: 0; }
.modal-x { background: none; border: none; color: var(--muted); font-size: 20px; padding: 2px 8px; }
.keys-box { display: flex; flex-direction: column; gap: 6px; }
.keys-title { color: var(--muted); font-size: 12px; text-transform: uppercase; margin: 0; }

@media (max-width: 720px) {
  .app { grid-template-columns: 240px 1fr; }
  .grid2 { grid-template-columns: 1fr; }
}