:root {
  --bg: #0d0a12;
  --bg-card: #1a1425;
  --primary: #8b5cf6;
  --primary-hover: #7c3aed;
  --text: #f1f0f5;
  --text-muted: #a89fb5;
  --border: #2e2640;
  --danger: #ef4444;
}

[data-theme="indigo"] {
  --bg: #0a0b14;
  --bg-card: #141726;
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --border: #262a45;
}

[data-theme="verde"] {
  --bg: #0a120d;
  --bg-card: #142218;
  --primary: #22c55e;
  --primary-hover: #16a34a;
  --border: #1f3326;
}

[data-theme="azul"] {
  --bg: #0a0f18;
  --bg-card: #131c2b;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --border: #1e2c42;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.5rem;
  width: 100%;
  max-width: 360px;
}

h1 {
  font-size: 1.4rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
  margin-top: 1rem;
}

input {
  width: 100%;
  padding: 0.7rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 1rem;
}

input:focus { outline: none; border-color: var(--primary); }

button {
  width: 100%;
  padding: 0.8rem;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  margin-top: 1.5rem;
  cursor: pointer;
}

button:hover { background: var(--primary-hover); }

.error {
  color: var(--danger);
  font-size: 0.85rem;
  margin-top: 1rem;
  text-align: center;
  display: none;
}