:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel-2: #334155;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-2: #818cf8;
  --success: #34d399;
  --danger: #f87171;
  --border: #475569;
  --radius: 10px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; }

.app-shell {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.25rem;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.25rem;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.brand {
  font-weight: 700;
  font-size: 1.1rem;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.15s ease;
}
.btn:hover { background: var(--border); }
.btn-primary {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border: none;
  color: #0b1220;
  font-weight: 600;
}
.btn-primary:hover { filter: brightness(1.1); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.field { margin-bottom: 1rem; }
.field label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 500;
}
.field input, .field textarea, .field select {
  width: 100%;
  padding: 0.6rem 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.95rem;
}
.field input:focus, .field textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.badge {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
}
.badge-ok { background: rgba(52,211,153,0.18); color: var(--success); }
.badge-warn { background: rgba(248,113,113,0.18); color: var(--danger); }
.badge-info { background: rgba(56,189,248,0.18); color: var(--accent); }

.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 0.8rem 1.2rem;
  border-radius: var(--radius);
  z-index: 5000;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}
.toast.error { border-color: var(--danger); color: var(--danger); }
.toast.success { border-color: var(--success); color: var(--success); }

@media (max-width: 640px) {
  .app-shell { padding: 0.75rem; }
  .topbar { padding: 0.75rem; }
}