:root {
  --bg: #0f172a;
  --card: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --primary: #3b82f6;
  --danger: #ef4444;
  --ok: #10b981;
}

* { box-sizing: border-box; }
body {
  margin: 0; font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: linear-gradient(150deg, #0b1220, #0f172a);
  color: var(--text);
  min-height: 100vh;
  display: flex; flex-direction: column;
}
.topbar {
  display: flex; align-items: center; gap: 16px;
  padding: 12px 16px; background: #0b1220; border-bottom: 1px solid #1f2937;
}
.topbar .spacer { flex: 1; }
.card {
  width: 100%; max-width: 720px; margin: 24px auto; padding: 20px;
  background: var(--card); border: 1px solid #1f2937; border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,.3);
}
h1, h2 { margin: 0 0 16px; }
label { display: block; margin: 8px 0 4px; color: var(--muted); }
input[type="text"], input[type="password"] {
  width: 100%; padding: 10px 12px; border-radius: 8px; border: 1px solid #374151;
  background: #0b1220; color: var(--text); outline: none;
}
.row { display: flex; gap: 8px; margin-bottom: 12px; }
.btn {
  padding: 8px 12px; border: 1px solid #374151; background: #0b1220; color: var(--text);
  border-radius: 8px; cursor: pointer;
}
.btn.primary { background: var(--primary); border-color: var(--primary); color: white; }
.btn.danger { background: var(--danger); border-color: var(--danger); color: white; }
.btn.small { padding: 6px 10px; font-size: 12px; }
.user { margin-right: 12px; color: var(--muted); }
.list { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.list-item {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 10px 12px; border: 1px solid #1f2937; border-radius: 10px; background: #0b1220;
}
.checkbox { display: flex; align-items: center; gap: 10px; }
.done { text-decoration: line-through; color: var(--muted); }
.actions { display: flex; gap: 6px; }
.editor { margin-top: 8px; display: flex; gap: 8px; }
.error { color: #fca5a5; margin-top: 8px; }
.muted { color: var(--muted); margin-left: 8px; }
.footer { text-align: center; margin-top: auto; padding: 16px; color: var(--muted); }