:root {
  --bg: #121212; --card: #1e1e1e; --text: #e0e0e0; --border: #333;
  --accent: #4a90d9; --danger: #d94a4a;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: Arial, Helvetica, sans-serif; background: var(--bg); color: var(--text); }
.hidden { display: none; }
input, select, textarea, button {
  font-family: inherit; font-size: 1rem; padding: .5rem; margin: .25rem 0;
  background: var(--card); color: var(--text); border: 1px solid var(--border); border-radius: 4px; width: 100%;
}
button { background: var(--accent); color: #fff; cursor: pointer; border: none; width: auto; padding: .5rem 1rem; }
button.danger { background: var(--danger); }
.login-box { max-width: 320px; margin: 3rem auto; padding: 1rem; text-align: center; }
header { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; padding: .75rem 1rem; background: var(--card); border-bottom: 1px solid var(--border); }
header h1 { font-size: 1.2rem; margin: 0; }
nav { display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; }
nav a { color: var(--text); text-decoration: none; padding: .25rem .5rem; }
nav a:hover { color: var(--accent); }
nav button { padding: .25rem .75rem; }
main { padding: 1rem; max-width: 900px; margin: 0 auto; }
table { width: 100%; border-collapse: collapse; margin: .5rem 0; display: block; overflow-x: auto; white-space: nowrap; }
th, td { border: 1px solid var(--border); padding: .5rem; text-align: left; font-size: .9rem; }
th { background: var(--card); }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 6px; padding: 1rem; margin-bottom: 1rem; }
.grid { display: grid; grid-template-columns: 1fr; gap: .5rem; }
@media (min-width: 600px) { .grid { grid-template-columns: 1fr 1fr; } }
.error { color: var(--danger); }
label { font-size: .8rem; opacity: .8; display: block; margin-top: .5rem; }