:root {
  --bg: #f5f5f5;
  --card: #fff;
  --accent: #1a73e8;
  --danger: #d93025;
  --ok: #188038;
  --border: #dadce0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: #202124;
  font-size: 16px;
  line-height: 1.4;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header h1 { margin: 0; font-size: 1.25rem; }

.main {
  padding: 16px;
  max-width: 960px;
  margin: 0 auto;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
}

.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.tab {
  flex: 1;
  min-width: 100px;
  padding: 10px;
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.95rem;
}

.tab.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn {
  display: inline-block;
  padding: 10px 16px;
  border-radius: 8px;
  border: none;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
  text-decoration: none;
  min-height: 44px;
}

.btn.secondary { background: #5f6368; }
.btn.danger { background: var(--danger); }
.btn.block { display: block; width: 100%; text-align: center; margin-top: 8px; }

input, select {
  width: 100%;
  padding: 12px;
  margin: 6px 0 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th, td {
  border: 1px solid var(--border);
  padding: 8px;
  text-align: left;
}

.status-connected { color: var(--ok); font-weight: 600; }
.status-error { color: var(--danger); font-weight: 600; }
.status-pending { color: #e37400; }

.perm-grid { overflow-x: auto; }

@media (min-width: 768px) {
  .main { padding: 24px; }
}