:root {
  --bg: #0f1115;
  --card: #171a21;
  --text: #e8e8ea;
  --muted: #9aa0aa;
  --accent: #5865F2;
  --danger: #ef4444;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

header {
  padding: 24px 32px;
  border-bottom: 1px solid #23262e;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

header .marca {
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.02em;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 20px;
  font-size: 0.95rem;
}

nav a:hover { color: var(--text); }

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 48px 24px;
}

.card {
  background: var(--card);
  border: 1px solid #23262e;
  border-radius: 12px;
  padding: 28px;
  margin-bottom: 20px;
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: white;
  padding: 12px 22px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  border: none;
  cursor: pointer;
}

.btn:hover { opacity: 0.9; }

.aviso-error {
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid var(--danger);
  color: #fca5a5;
  padding: 14px 18px;
  border-radius: 8px;
  margin-bottom: 20px;
}

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

form label {
  display: block;
  margin-top: 16px;
  margin-bottom: 6px;
  font-size: 0.9rem;
  color: var(--muted);
}

form input, form textarea, form select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid #2a2e38;
  background: #10131a;
  color: var(--text);
  font-family: inherit;
}