:root {
  --bg: #0d1117; --bg2: #161b22; --bg3: #21262d; --border: #30363d;
  --text: #e6edf3; --text2: #8b949e; --accent: #58a6ff; --green: #3fb950;
  --red: #f85149; --yellow: #d29922;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font); background: var(--bg); color: var(--text); font-size: 14px; }

.app { display: flex; height: 100vh; }

/* Sidebar */
.sidebar { width: 260px; background: var(--bg2); border-right: 1px solid var(--border); display: flex; flex-direction: column; flex-shrink: 0; }
.sidebar h1 { font-size: 16px; padding: 16px; border-bottom: 1px solid var(--border); }
.sidebar h1 span { color: var(--text2); font-weight: normal; font-size: 12px; }
.sidebar-section { padding: 12px 16px; border-bottom: 1px solid var(--border); }
.sidebar-section label { display: block; font-size: 11px; text-transform: uppercase; color: var(--text2); margin-bottom: 6px; letter-spacing: 0.5px; }
.sidebar-section select,
.sidebar-section input { width: 100%; padding: 6px 8px; background: var(--bg3); border: 1px solid var(--border); color: var(--text); border-radius: 4px; font-size: 13px; }

/* Nav */
.nav { flex: 1; overflow-y: auto; padding: 8px 0; }
.nav-item { display: block; width: 100%; padding: 8px 16px; background: none; border: none; color: var(--text2); text-align: left; cursor: pointer; font-size: 13px; font-family: var(--font); }
.nav-item:hover { background: var(--bg3); color: var(--text); }
.nav-item.active { background: var(--bg3); color: var(--accent); border-left: 2px solid var(--accent); }

/* Main content */
.main { flex: 1; overflow-y: auto; padding: 24px; }

/* Panels */
.panel { background: var(--bg2); border: 1px solid var(--border); border-radius: 6px; margin-bottom: 16px; }
.panel-header { padding: 12px 16px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
.panel-header h2 { font-size: 14px; font-weight: 600; }
.panel-body { padding: 16px; }
.panel-body.no-pad { padding: 0; }

/* Tables */
table { width: 100%; border-collapse: collapse; }
th, td { padding: 8px 12px; text-align: left; border-bottom: 1px solid var(--border); font-size: 13px; }
th { color: var(--text2); font-weight: 500; font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; background: var(--bg); }
td { vertical-align: top; }

/* Utilities */
.mono { font-family: 'SF Mono', 'Fira Code', monospace; font-size: 12px; }
.truncate { max-width: 300px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Badges */
.badge { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 11px; font-weight: 500; }
.badge-green { background: rgba(63,185,80,0.15); color: var(--green); }
.badge-red { background: rgba(248,81,73,0.15); color: var(--red); }
.badge-yellow { background: rgba(210,153,34,0.15); color: var(--yellow); }
.badge-blue { background: rgba(88,166,255,0.15); color: var(--accent); }

/* Buttons */
.btn { padding: 6px 12px; border-radius: 4px; border: 1px solid var(--border); background: var(--bg3); color: var(--text); cursor: pointer; font-size: 12px; font-family: var(--font); }
.btn:hover { background: var(--border); }
.btn-primary { background: rgba(88,166,255,0.15); border-color: var(--accent); color: var(--accent); }
.btn-danger { background: rgba(248,81,73,0.1); border-color: var(--red); color: var(--red); }
.btn-sm { padding: 3px 8px; font-size: 11px; }

/* Status */
.status { display: flex; align-items: center; gap: 8px; padding: 12px 16px; font-size: 12px; color: var(--text2); border-top: 1px solid var(--border); }
.dot { width: 8px; height: 8px; border-radius: 50%; }
.dot-green { background: var(--green); }
.dot-red { background: var(--red); }
.dot-yellow { background: var(--yellow); }

/* Forms */
.form-row { display: flex; gap: 8px; margin-bottom: 8px; }
.form-row input,
.form-row textarea { flex: 1; padding: 6px 8px; background: var(--bg); border: 1px solid var(--border); color: var(--text); border-radius: 4px; font-family: var(--font); font-size: 13px; }
.form-row textarea { min-height: 60px; resize: vertical; }

/* Config */
.config-field { margin-bottom: 16px; }
.config-field label { display: block; font-size: 12px; color: var(--text2); margin-bottom: 4px; }
.config-field textarea { width: 100%; min-height: 80px; padding: 8px; background: var(--bg); border: 1px solid var(--border); color: var(--text); border-radius: 4px; font-family: 'SF Mono', monospace; font-size: 12px; resize: vertical; }
.config-field .hint { font-size: 11px; color: var(--text2); margin-top: 4px; }

/* JSON viewer */
.json-view { background: var(--bg); border: 1px solid var(--border); border-radius: 4px; padding: 12px; overflow-x: auto; white-space: pre-wrap; word-break: break-all; font-family: 'SF Mono', monospace; font-size: 12px; color: var(--text2); max-height: 300px; overflow-y: auto; }

/* Tool calls */
.tool-call { border: 1px solid var(--border); border-radius: 4px; margin-bottom: 8px; overflow: hidden; }
.tool-call-header { padding: 8px 12px; background: var(--bg); display: flex; justify-content: space-between; align-items: center; cursor: pointer; }
.tool-call-header:hover { background: var(--bg3); }
.tool-call-body { padding: 12px; border-top: 1px solid var(--border); display: none; }
.tool-call.expanded .tool-call-body { display: block; }

/* Messages */
.message { padding: 12px; border-bottom: 1px solid var(--border); }
.message:last-child { border-bottom: none; }
.message-role { font-size: 11px; text-transform: uppercase; color: var(--text2); margin-bottom: 4px; letter-spacing: 0.5px; }
.message-role.user { color: var(--accent); }
.message-role.assistant { color: var(--green); }
.message-role.system { color: var(--yellow); }
.message-content { font-size: 13px; line-height: 1.5; white-space: pre-wrap; word-break: break-word; }

/* Tabs */
.tabs { display: flex; border-bottom: 1px solid var(--border); }
.tab { padding: 8px 16px; background: none; border: none; color: var(--text2); cursor: pointer; font-size: 13px; font-family: var(--font); border-bottom: 2px solid transparent; }
.tab:hover { color: var(--text); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }

/* Spinner */
.spinner { display: inline-block; width: 14px; height: 14px; border: 2px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Toast */
.toast { position: fixed; bottom: 20px; right: 20px; padding: 10px 16px; border-radius: 6px; font-size: 13px; z-index: 100; animation: fadeIn 0.2s; }
.toast-success { background: rgba(63,185,80,0.9); color: #fff; }
.toast-error { background: rgba(248,81,73,0.9); color: #fff; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.empty { color: var(--text2); font-style: italic; padding: 24px; text-align: center; }