:root {
  --bg: #f5f7fb;
  --card: #ffffff;
  --primary: #0a66c2;
  --text: #1d2226;
  --muted: #6b7280;
  --border: #e5e7eb;
  --danger: #dc2626;
  --success: #16a34a;
  --warn: #d97706;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.topbar {
  background: var(--primary);
  color: #fff;
  padding: 12px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.topbar .brand { font-weight: 700; font-size: 18px; }
.topbar nav a, .topbar nav button.link {
  color: #fff;
  text-decoration: none;
  margin-left: 18px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 14px;
}
.topbar nav a:hover, .topbar nav button.link:hover { text-decoration: underline; }

.container { max-width: 1100px; margin: 24px auto; padding: 0 16px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.03);
}

h1 { margin-top: 0; }
h2 { margin-top: 0; font-size: 18px; }
.muted { color: var(--muted); font-size: 14px; }

label {
  display: block;
  margin-bottom: 14px;
  font-size: 14px;
  color: #374151;
}
input[type="text"], input[type="url"], input[type="password"],
textarea, select {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  margin-top: 4px;
  background: #fff;
}

label.checkbox { display: flex; align-items: center; gap: 8px; }
label.checkbox input { width: auto; margin: 0; }

button, .button {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
  color: var(--text);
  font-size: 14px;
}
button.primary, .button.primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
button.link { background: none; border: none; padding: 0; color: var(--primary); cursor: pointer; }
button.link.danger { color: var(--danger); }

.alert.error {
  background: #fee2e2;
  color: var(--danger);
  padding: 10px 12px;
  border-radius: 6px;
  margin-bottom: 12px;
}

.login-card { max-width: 400px; margin: 60px auto; }

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 8px;
  font-size: 14px;
}
table th, table td {
  border-bottom: 1px solid var(--border);
  padding: 8px 6px;
  text-align: left;
  vertical-align: top;
}
table th { font-weight: 600; color: var(--muted); }
.truncate { max-width: 280px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  background: #e5e7eb;
  color: #374151;
}
.badge.completed { background: #dcfce7; color: var(--success); }
.badge.invite_sent { background: #fef3c7; color: var(--warn); }
.badge.error { background: #fee2e2; color: var(--danger); }
.badge.received { background: #dbeafe; color: #1d4ed8; }

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
@media (max-width: 700px) {
  .grid-2 { grid-template-columns: 1fr; }
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9em;
  background: #f3f4f6;
  padding: 2px 4px;
  border-radius: 4px;
}
hr { border: none; border-top: 1px solid var(--border); margin: 18px 0; }