:root {
  --bg: #0f1115;
  --card-bg: #1a1d24;
  --text: #e6e8eb;
  --muted: #9aa1ab;
  --accent: #4f8cff;
  --ok: #3ecf7a;
  --warning: #f5b942;
  --error: #f2545b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  border-bottom: 1px solid #2a2d35;
}

.brand {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
}

.topbar nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 1.5rem;
}

.topbar nav a:hover { color: var(--accent); }

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem;
}

.subtitle { color: var(--muted); }

.cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2rem;
}

@media (max-width: 600px) {
  .cards { grid-template-columns: 1fr; }
}

.card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 1.5rem;
  text-decoration: none;
  color: var(--text);
  border: 1px solid #2a2d35;
  transition: border-color 0.15s;
}

.card:hover { border-color: var(--accent); }

.upload-form {
  display: flex;
  gap: 0.75rem;
  margin: 1.5rem 0;
  flex-wrap: wrap;
}

input[type="file"], input[type="text"] {
  background: var(--card-bg);
  border: 1px solid #2a2d35;
  color: var(--text);
  padding: 0.6rem;
  border-radius: 8px;
  flex: 1;
  min-width: 200px;
}

button {
  background: var(--accent);
  color: white;
  border: none;
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
}

button:hover { opacity: 0.9; }

.narrative { list-style: none; padding: 0; }
.narrative li {
  background: var(--card-bg);
  padding: 1rem;
  border-radius: 8px;
  margin-bottom: 0.75rem;
  border-left: 4px solid var(--muted);
}
.severity-alta { border-left-color: var(--error); }
.severity-media { border-left-color: var(--warning); }

.ok { color: var(--ok); }
.warning { color: var(--warning); }
.error { color: var(--error); }

.footer {
  text-align: center;
  color: var(--muted);
  padding: 2rem;
  font-size: 0.85rem;
}