:root {
  --fondo: #F9F5F0;
  --primario: #D2A679;
  --primario-oscuro: #B58B5A;
  --texto: #5C4033;
  --texto-claro: #8B7A6B;
  --blanco: #FFFFFF;
  --sombra: 0 4px 12px rgba(92,64,51,0.1);
  --border-radius: 12px;
}
* { box-sizing: border-box; margin:0; padding:0; }
body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: var(--fondo);
  color: var(--texto);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}
#app {
  width: 100%;
  max-width: 1200px;
  margin: auto;
  padding: 16px;
  padding-bottom: 80px;
}
/* Splash */
.splash-screen {
  text-align: center; padding: 40px;
}
.splash-screen h1 { color: var(--primario); font-size: 2em; }
/* Tarjetas */
.card {
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(10px);
  border-radius: var(--border-radius);
  box-shadow: var(--sombra);
  padding: 20px;
  margin-bottom: 16px;
}
/* Botones */
.btn {
  background: var(--primario);
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.3s;
}
.btn:hover { background: var(--primario-oscuro); }
.btn-outline {
  background: transparent;
  border: 2px solid var(--primario);
  color: var(--primario);
}
/* Formularios */
input, select, textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid #ddd;
  border-radius: 8px;
  margin: 8px 0;
  font-size: 1rem;
  background: white;
}
/* Navegación inferior móvil */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0; right: 0;
  background: white;
  display: flex;
  justify-content: space-around;
  box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
  padding: 8px 0;
  z-index: 1000;
}
.bottom-nav button {
  background: none; border: none;
  color: var(--texto-claro);
  font-size: 0.8rem;
  display: flex; flex-direction: column; align-items: center;
}
.bottom-nav button.active { color: var(--primario); font-weight: bold; }
/* Sidebar escritorio */
.sidebar {
  position: fixed; left: 0; top: 0; bottom: 0;
  width: 240px; background: white; box-shadow: 2px 0 10px rgba(0,0,0,0.1);
  padding: 20px; display: none;
}
@media (min-width: 768px) {
  .sidebar { display: block; }
  #app { margin-left: 240px; padding-bottom: 20px; }
  .bottom-nav { display: none; }
}
/* Utilidades */
.text-center { text-align: center; }
.mt-2 { margin-top: 16px; }
.flex { display: flex; gap: 12px; }
.hidden { display: none; }
.alerta-roja { color: #c0392b; font-weight: bold; }