:root {
  --bg: #0b0d12;
  --panel: #111419;
  --panel-2: #161a21;
  --border: #232833;
  --text: #e6e9ef;
  --muted: #8a93a3;
  --accent: #7c5cff;
  --accent-2: #36d399;
  --warn: #ffb454;
  --error: #ff6b6b;
  --code: #0f131a;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 22px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, #0d1017, #0b0d12);
  position: sticky;
  top: 0;
  z-index: 5;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand h1 { font-size: 16px; margin: 0; letter-spacing: 0.2px; }
.brand .tag { color: var(--muted); font-size: 12px; }
.logo-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #b39dff, var(--accent));
  box-shadow: 0 0 12px var(--accent);
}
.actions { display: flex; gap: 10px; align-items: center; }
.base-url-wrap {
  display: flex; align-items: center; gap: 8px;
  background: var(--panel); border: 1px solid var(--border);
  padding: 6px 10px; border-radius: 8px;
}
.base-url-wrap span { color: var(--muted); font-size: 12px; }
.base-url-wrap input {
  background: transparent; border: 0; color: var(--text); width: 320px; outline: none;
}

.layout { display: grid; grid-template-columns: 280px 1fr; min-height: calc(100vh - 56px); }
.sidebar {
  border-right: 1px solid var(--border);
  background: var(--panel);
  padding: 14px 10px;
  overflow-y: auto;
}
.assistant-nav { display: flex; flex-direction: column; gap: 2px; }
.assistant-nav button {
  text-align: left;
  background: transparent; color: var(--text);
  border: 0; padding: 10px 12px; border-radius: 8px;
  cursor: pointer; font-size: 13px;
  display: flex; flex-direction: column; gap: 2px;
}
.assistant-nav button:hover { background: var(--panel-2); }
.assistant-nav button.active { background: var(--panel-2); outline: 1px solid var(--border); }
.assistant-nav button .desc { color: var(--muted); font-size: 11px; }

.content { padding: 22px; overflow: auto; }
.content .empty { color: var(--muted); padding: 20px; }

.assistant-header {
  margin-bottom: 14px;
  display: flex; align-items: baseline; justify-content: space-between; gap: 12px;
}
.assistant-header h2 { margin: 0; font-size: 20px; }
.assistant-header p { margin: 4px 0 0; color: var(--muted); }

.tool-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 14px;
  overflow: hidden;
}
.tool-head {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 12px 14px;
  cursor: pointer;
  user-select: none;
  border-bottom: 1px solid transparent;
}
.tool-head:hover { background: var(--panel-2); }
.tool-card.open .tool-head { border-bottom-color: var(--border); }
.tool-name { font-weight: 600; }
.tool-method {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  background: #1c2230; color: #b9c4d8;
  padding: 2px 8px; border-radius: 6px;
}
.tool-method.get  { background: #1a2a1f; color: #8be3a8; }
.tool-method.post { background: #1a1f2c; color: #9aa9ff; }
.tool-desc { color: var(--muted); font-size: 12px; margin: 2px 0 0; }
.tool-body { display: none; padding: 12px 14px; }
.tool-card.open .tool-body { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.form-grid { display: grid; gap: 10px; }
.field label {
  display: block; color: var(--muted); font-size: 12px; margin-bottom: 4px;
}
.field input, .field select, .field textarea {
  width: 100%;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12.5px;
}
.field textarea { min-height: 70px; resize: vertical; }
.field .hint { color: var(--muted); font-size: 11px; margin-top: 4px; }
.field.required label::after { content: " *"; color: var(--error); }

.btn {
  background: var(--accent);
  border: 0; color: white; padding: 8px 14px; border-radius: 8px; cursor: pointer; font-size: 13px;
}
.btn:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn.small { padding: 6px 10px; font-size: 12px; }

.tool-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 8px; }
.tool-output { background: var(--code); border: 1px solid var(--border); border-radius: 8px; padding: 10px; }
.tool-output pre {
  margin: 0; white-space: pre-wrap; word-break: break-word;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px; color: #cfd6e4;
}
.tool-output .label { font-size: 11px; color: var(--muted); margin: 0 0 4px; text-transform: uppercase; letter-spacing: 0.06em; }
.tool-output .ok { color: var(--accent-2); }
.tool-output .err { color: var(--error); }
.tool-output + .tool-output { margin-top: 8px; }

@media (max-width: 880px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { border-right: 0; border-bottom: 1px solid var(--border); }
  .tool-card.open .tool-body { grid-template-columns: 1fr; }
}