:root {
  --bg: #0f1419;
  --card: #1a2332;
  --border: #2d3a4f;
  --text: #e8edf4;
  --muted: #8b9cb3;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --danger: #dc2626;
  --ok: #16a34a;
  font-family: "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); min-height: 100vh; }

.login-page { display: flex; align-items: center; justify-content: center; padding: 2rem; }
.login-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  width: 100%;
  max-width: 400px;
}
.login-card h1 { margin: 0 0 0.25rem; font-size: 1.5rem; }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--card);
}
.topbar .muted { margin-left: 0.75rem; font-size: 0.9rem; }
.topbar-actions { display: flex; gap: 0.75rem; align-items: center; }

.layout { max-width: 960px; margin: 0 auto; padding: 1.5rem; display: flex; flex-direction: column; gap: 1.25rem; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
}
.card h2 { margin: 0 0 1rem; font-size: 1.1rem; }

label { display: block; margin-bottom: 1rem; font-size: 0.9rem; }
input[type=text], input[type=password], input[type=file], textarea, select {
  display: block;
  width: 100%;
  margin-top: 0.35rem;
  padding: 0.6rem 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 1rem;
}
textarea { resize: vertical; min-height: 80px; }

.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  text-decoration: none;
  font-size: 0.9rem;
}
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-hover); }
.btn.danger { border-color: var(--danger); color: #fca5a5; }
.btn:hover { opacity: 0.9; }

.muted { color: var(--muted); }
.error { color: #f87171; font-size: 0.9rem; }
.lang-form.inline select { width: auto; display: inline-block; margin: 0; }

table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
th, td { text-align: left; padding: 0.5rem 0.25rem; border-bottom: 1px solid var(--border); }

.chat-card textarea { margin-bottom: 0.75rem; }
.answer {
  margin-top: 1rem;
  padding: 1rem;
  background: var(--bg);
  border-radius: 8px;
  white-space: pre-wrap;
  line-height: 1.5;
}
.sources { margin-top: 1rem; }
.sources h3 { font-size: 0.95rem; margin: 0 0 0.5rem; color: var(--muted); }
.sources ul { margin: 0; padding-left: 1.25rem; color: var(--muted); font-size: 0.9rem; }
.hidden { display: none; }

@media (max-width: 600px) {
  .topbar { flex-direction: column; gap: 0.75rem; align-items: flex-start; }
}