/* Estilos básicos inspirados en Material Design 2014 */

/* Tipografía */
body {
    font-family: 'Roboto', sans-serif;
    font-size: 16px;
    background-color: #FAFAFA;
    color: #212121;
    margin: 0;
    padding: 0;
}

/* Encabezado */
.header {
    background-color: #2196F3; /* Azul de acento */
    color: white;
    padding: 16px;
    text-align: center;
    font-size: 24px;
    font-weight: 500;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* Botón flotante de acción (FAB) */
.fab {
    position: fixed;
    bottom: 16px;
    right: 16px;
    width: 56px;
    height: 56px;
    background-color: #2196F3;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}
.fab:hover {
    background-color: #1976D2;
    transform: scale(1.1);
}

/* Tarjetas */
.card {
    background: white;
    margin: 16px;
    padding: 16px;
    border-radius: 4px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    transition: box-shadow 0.3s, transform 0.2s;
}
.card:hover {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    transform: translateY(-4px);
}

/* Botones estándar */
.button {
    background-color: #2196F3;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s, transform 0.2s;
}
.button:hover {
    background-color: #1976D2;
    transform: scale(1.05);
}

/* Enlaces */
a {
    color: #2196F3;
    text-decoration: none;
    transition: color 0.3s;
}
a:hover {
    color: #1976D2;
}

/* Menú de navegación */
.navbar {
    background-color: #2196F3;
    padding: 8px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: white;
    font-size: 18px;
}

/* Animación de carga */
.loader {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #2196F3;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}