/* Batman theme: negro + amarillo */
:root {
  --bg: #0b0b0b;
  --card: #111214;
  --text: #f4f4f4;
  --muted: #b8b8b8;
  --primary: #ffd400; /* amarillo */
  --danger: #e5484d;
  --border: #22242a;
  --shadow: rgba(0,0,0,0.45);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica Neue, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.app-header, .app-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: #0e0e0f;
  border-bottom: 1px solid var(--border);
}

.app-footer {
  margin-top: auto;
  font-size: 12px;
  color: var(--muted);
  border-top: 1px solid var(--border);
  border-bottom: none;
}

.brand { display: flex; gap: 10px; align-items: center; }
.brand h1 { margin: 0; font-size: 18px; letter-spacing: 0.3px; }
.brand-icon { width: 28px; height: 28px; border-radius: 8px; box-shadow: 0 4px 16px var(--shadow); }

main#app {
  padding: 28px 16px;
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
}

.card {
  background: linear-gradient(180deg, #121317, #0f1013 40%);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 20px;
  box-shadow: 0 10px 30px var(--shadow);
}

h2 { margin: 0 0 12px; }
h3 { margin: 16px 0 8px; }

label { display: grid; gap: 6px; margin: 10px 0; font-size: 14px; color: var(--muted); }
input, textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #0a0b0d;
  color: var(--text);
  outline: none;
}
input:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(255, 212, 0, 0.18);
}

button {
  border: none;
  padding: 10px 14px;
  border-radius: 12px;
  cursor: pointer;
  background: #1a1b1f;
  color: var(--text);
  transition: transform .05s ease, filter .2s ease;
  border: 1px solid var(--border);
}
button:hover { filter: brightness(1.1); }
button:active { transform: translateY(1px); }

button.primary {
  background: var(--primary);
  color: #1b1b1b;
  font-weight: 700;
}
button.danger {
  background: var(--danger);
  color: white;
}

.ghost-btn {
  background: transparent;
  border-color: var(--border);
}

.grid { display: grid; gap: 16px; grid-template-columns: 1fr; }
.row { display: flex; gap: 8px; flex-wrap: wrap; }

.hint { color: var(--muted); font-size: 12px; margin-top: 8px; }