*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #0f172a; --surface: #1e293b; --border: #334155;
  --text: #f1f5f9; --muted: #94a3b8; --accent: #3b82f6;
  --success: #22c55e; --warn: #f59e0b; --danger: #ef4444;
  --radius: 8px;
}
html, body { height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.6;
  display: flex; flex-direction: column;
}
.login-page { display: flex; align-items: center; justify-content: center; height: 100vh; }
.login-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 40px; width: 380px; text-align: center;
}
.login-card h1 { font-size: 22px; margin-bottom: 6px; }
.login-card p { color: var(--muted); font-size: 13px; margin-bottom: 24px; }
.login-card input {
  width: 100%; padding: 12px 14px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--bg); color: var(--text);
  font-size: 14px; outline: none; margin-bottom: 16px;
}
.login-card input:focus { border-color: var(--accent); }
.login-card button {
  width: 100%; padding: 12px; border-radius: var(--radius);
  background: var(--accent); color: #fff; border: none; font-size: 14px;
  font-weight: 600; cursor: pointer;
}
.login-card button:hover { opacity: .9; }
.login-error { color: var(--danger); font-size: 13px; margin-top: 10px; min-height: 20px; }

.layout { display: flex; height: 100vh; }
.sidebar {
  width: 220px; background: var(--surface); border-right: 1px solid var(--border);
  padding: 20px 0; display: flex; flex-direction: column; flex-shrink: 0;
}
.sidebar h2 { font-size: 16px; padding: 0 20px 20px; border-bottom: 1px solid var(--border); margin-bottom: 8px; }
.sidebar a {
  display: block; padding: 10px 20px; color: var(--muted); text-decoration: none;
  font-size: 13px; border-left: 3px solid transparent; transition: all .15s;
}
.sidebar a:hover, .sidebar a.active { color: var(--text); background: rgba(255,255,255,.04); border-left-color: var(--accent); }
.main { flex: 1; overflow-y: auto; padding: 32px; }
.page { display: none; }
.page.active { display: block; }

.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; margin-bottom: 16px;
}
.card h3 { font-size: 15px; margin-bottom: 12px; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; margin-bottom: 24px; }
.stat {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px;
}
.stat-label { font-size: 12px; color: var(--muted); margin-bottom: 4px; text-transform: uppercase; letter-spacing: .5px; }
.stat-value { font-size: 26px; font-weight: 700; }
.stat-value.green { color: var(--success); }
.stat-value.blue { color: var(--accent); }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th { text-align: left; padding: 10px 12px; color: var(--muted); font-weight: 600; border-bottom: 1px solid var(--border); font-size: 11px; text-transform: uppercase; letter-spacing: .5px; }
td { padding: 10px 12px; border-bottom: 1px solid var(--border); }
tr:hover td { background: rgba(255,255,255,.02); }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 6px; font-weight: 600; text-transform: uppercase; letter-spacing: .5px; }
.form-group input, .form-group select {
  width: 100%; padding: 10px 12px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--bg); color: var(--text);
  font-size: 13px; outline: none; max-width: 480px;
}
.form-group input:focus { border-color: var(--accent); }
.form-row { display: flex; gap: 16px; }
.form-row .form-group { flex: 1; }
.form-hint { font-size: 11px; color: var(--muted); margin-top: 4px; }

.btn {
  display: inline-flex; align-items: center; gap: 6px; padding: 10px 20px;
  border-radius: var(--radius); font-size: 13px; font-weight: 600;
  border: none; cursor: pointer; transition: all .15s;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { opacity: .9; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { background: rgba(255,255,255,.05); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-row { display: flex; gap: 8px; margin-top: 16px; }

.toast {
  position: fixed; top: 20px; right: 20px; z-index: 999;
  padding: 12px 20px; border-radius: var(--radius); font-size: 13px;
  opacity: 0; transform: translateY(-10px); transition: all .3s;
  max-width: 360px;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.success { background: #166534; color: #bbf7d0; border: 1px solid #22c55e; }
.toast.error { background: #7f1d1d; color: #fecaca; border: 1px solid #ef4444; }

.spinner { display: inline-block; width: 16px; height: 16px; border: 2px solid rgba(255,255,255,.3); border-top-color: #fff; border-radius: 50%; animation: spin .6s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.status-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 6px; }
.status-dot.idle { background: var(--muted); }
.status-dot.active { background: var(--success); animation: pulse 1.5s infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.4} }

.empty-state { text-align: center; padding: 40px 20px; color: var(--muted); }
.empty-state p { font-size: 13px; }

.chart-container { height: 200px; position: relative; margin: 12px 0; }
.chart-container canvas { width: 100% !important; height: 100% !important; }

.log-viewer {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px; max-height: 400px; overflow-y: auto; font-family: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
  font-size: 12px; line-height: 1.7; white-space: pre-wrap; word-break: break-all;
}
.log-line.info { color: var(--muted); }
.log-line.warn { color: var(--warn); }
.log-line.error { color: var(--danger); }
.log-line.relay { color: var(--accent); }

@media (max-width: 700px) {
  .layout { flex-direction: column; }
  .sidebar { width: 100%; flex-direction: row; overflow-x: auto; padding: 10px; }
  .sidebar h2 { padding: 0 12px 0 0; border: none; margin: 0; font-size: 14px; }
  .sidebar a { border-left: none; border-bottom: 2px solid transparent; padding: 8px 10px; white-space: nowrap; }
  .sidebar a.active { border-left: none; border-bottom-color: var(--accent); }
  .main { padding: 16px; }
  .form-row { flex-direction: column; }
}